1 |
/* $Header$ */
|
2 |
/*
|
3 |
* tclBasic.c --
|
4 |
*
|
5 |
* Contains the basic facilities for TCL command interpretation,
|
6 |
* including interpreter creation and deletion, command creation
|
7 |
* and deletion, and command parsing and execution.
|
8 |
*
|
9 |
* Copyright (c) 1987-1994 The Regents of the University of California.
|
10 |
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
|
11 |
* Copyright (c) 1998-1999 by Scriptics Corporation.
|
12 |
*
|
13 |
* See the file "license.terms" for information on usage and redistribution
|
14 |
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
15 |
*
|
16 |
* RCS: @(#) $Id: tclbasic.c,v 1.1.1.1 2001/06/13 04:33:43 dtashley Exp $
|
17 |
*/
|
18 |
|
19 |
#include "tclInt.h"
|
20 |
#include "tclCompile.h"
|
21 |
#ifndef TCL_GENERIC_ONLY
|
22 |
# include "tclPort.h"
|
23 |
#endif
|
24 |
|
25 |
/*
|
26 |
* Static procedures in this file:
|
27 |
*/
|
28 |
|
29 |
static void DeleteInterpProc _ANSI_ARGS_((Tcl_Interp *interp));
|
30 |
static void ProcessUnexpectedResult _ANSI_ARGS_((
|
31 |
Tcl_Interp *interp, int returnCode));
|
32 |
static void RecordTracebackInfo _ANSI_ARGS_((
|
33 |
Tcl_Interp *interp, Tcl_Obj *objPtr,
|
34 |
int numSrcBytes));
|
35 |
|
36 |
extern TclStubs tclStubs;
|
37 |
|
38 |
/*
|
39 |
* The following structure defines the commands in the Tcl core.
|
40 |
*/
|
41 |
|
42 |
typedef struct {
|
43 |
char *name; /* Name of object-based command. */
|
44 |
Tcl_CmdProc *proc; /* String-based procedure for command. */
|
45 |
Tcl_ObjCmdProc *objProc; /* Object-based procedure for command. */
|
46 |
CompileProc *compileProc; /* Procedure called to compile command. */
|
47 |
int isSafe; /* If non-zero, command will be present
|
48 |
* in safe interpreter. Otherwise it will
|
49 |
* be hidden. */
|
50 |
} CmdInfo;
|
51 |
|
52 |
/*
|
53 |
* The built-in commands, and the procedures that implement them:
|
54 |
*/
|
55 |
|
56 |
static CmdInfo builtInCmds[] = {
|
57 |
/*
|
58 |
* Commands in the generic core. Note that at least one of the proc or
|
59 |
* objProc members should be non-NULL. This avoids infinitely recursive
|
60 |
* calls between TclInvokeObjectCommand and TclInvokeStringCommand if a
|
61 |
* command name is computed at runtime and results in the name of a
|
62 |
* compiled command.
|
63 |
*/
|
64 |
|
65 |
{"append", (Tcl_CmdProc *) NULL, Tcl_AppendObjCmd,
|
66 |
(CompileProc *) NULL, 1},
|
67 |
{"array", (Tcl_CmdProc *) NULL, Tcl_ArrayObjCmd,
|
68 |
(CompileProc *) NULL, 1},
|
69 |
{"binary", (Tcl_CmdProc *) NULL, Tcl_BinaryObjCmd,
|
70 |
(CompileProc *) NULL, 1},
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71 |
{"break", (Tcl_CmdProc *) NULL, Tcl_BreakObjCmd,
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TclCompileBreakCmd, 1},
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73 |
{"case", (Tcl_CmdProc *) NULL, Tcl_CaseObjCmd,
|
74 |
(CompileProc *) NULL, 1},
|
75 |
{"catch", (Tcl_CmdProc *) NULL, Tcl_CatchObjCmd,
|
76 |
TclCompileCatchCmd, 1},
|
77 |
{"clock", (Tcl_CmdProc *) NULL, Tcl_ClockObjCmd,
|
78 |
(CompileProc *) NULL, 1},
|
79 |
{"concat", (Tcl_CmdProc *) NULL, Tcl_ConcatObjCmd,
|
80 |
(CompileProc *) NULL, 1},
|
81 |
{"continue", (Tcl_CmdProc *) NULL, Tcl_ContinueObjCmd,
|
82 |
TclCompileContinueCmd, 1},
|
83 |
{"encoding", (Tcl_CmdProc *) NULL, Tcl_EncodingObjCmd,
|
84 |
(CompileProc *) NULL, 0},
|
85 |
{"error", (Tcl_CmdProc *) NULL, Tcl_ErrorObjCmd,
|
86 |
(CompileProc *) NULL, 1},
|
87 |
{"eval", (Tcl_CmdProc *) NULL, Tcl_EvalObjCmd,
|
88 |
(CompileProc *) NULL, 1},
|
89 |
{"exit", (Tcl_CmdProc *) NULL, Tcl_ExitObjCmd,
|
90 |
(CompileProc *) NULL, 0},
|
91 |
{"expr", (Tcl_CmdProc *) NULL, Tcl_ExprObjCmd,
|
92 |
TclCompileExprCmd, 1},
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93 |
{"fcopy", (Tcl_CmdProc *) NULL, Tcl_FcopyObjCmd,
|
94 |
(CompileProc *) NULL, 1},
|
95 |
{"fileevent", (Tcl_CmdProc *) NULL, Tcl_FileEventObjCmd,
|
96 |
(CompileProc *) NULL, 1},
|
97 |
{"for", (Tcl_CmdProc *) NULL, Tcl_ForObjCmd,
|
98 |
TclCompileForCmd, 1},
|
99 |
{"foreach", (Tcl_CmdProc *) NULL, Tcl_ForeachObjCmd,
|
100 |
TclCompileForeachCmd, 1},
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101 |
{"format", (Tcl_CmdProc *) NULL, Tcl_FormatObjCmd,
|
102 |
(CompileProc *) NULL, 1},
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103 |
{"global", (Tcl_CmdProc *) NULL, Tcl_GlobalObjCmd,
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104 |
(CompileProc *) NULL, 1},
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105 |
{"if", (Tcl_CmdProc *) NULL, Tcl_IfObjCmd,
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106 |
TclCompileIfCmd, 1},
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107 |
{"incr", (Tcl_CmdProc *) NULL, Tcl_IncrObjCmd,
|
108 |
TclCompileIncrCmd, 1},
|
109 |
{"info", (Tcl_CmdProc *) NULL, Tcl_InfoObjCmd,
|
110 |
(CompileProc *) NULL, 1},
|
111 |
{"join", (Tcl_CmdProc *) NULL, Tcl_JoinObjCmd,
|
112 |
(CompileProc *) NULL, 1},
|
113 |
{"lappend", (Tcl_CmdProc *) NULL, Tcl_LappendObjCmd,
|
114 |
(CompileProc *) NULL, 1},
|
115 |
{"lindex", (Tcl_CmdProc *) NULL, Tcl_LindexObjCmd,
|
116 |
(CompileProc *) NULL, 1},
|
117 |
{"linsert", (Tcl_CmdProc *) NULL, Tcl_LinsertObjCmd,
|
118 |
(CompileProc *) NULL, 1},
|
119 |
{"list", (Tcl_CmdProc *) NULL, Tcl_ListObjCmd,
|
120 |
(CompileProc *) NULL, 1},
|
121 |
{"llength", (Tcl_CmdProc *) NULL, Tcl_LlengthObjCmd,
|
122 |
(CompileProc *) NULL, 1},
|
123 |
{"load", (Tcl_CmdProc *) NULL, Tcl_LoadObjCmd,
|
124 |
(CompileProc *) NULL, 0},
|
125 |
{"lrange", (Tcl_CmdProc *) NULL, Tcl_LrangeObjCmd,
|
126 |
(CompileProc *) NULL, 1},
|
127 |
{"lreplace", (Tcl_CmdProc *) NULL, Tcl_LreplaceObjCmd,
|
128 |
(CompileProc *) NULL, 1},
|
129 |
{"lsearch", (Tcl_CmdProc *) NULL, Tcl_LsearchObjCmd,
|
130 |
(CompileProc *) NULL, 1},
|
131 |
{"lsort", (Tcl_CmdProc *) NULL, Tcl_LsortObjCmd,
|
132 |
(CompileProc *) NULL, 1},
|
133 |
{"namespace", (Tcl_CmdProc *) NULL, Tcl_NamespaceObjCmd,
|
134 |
(CompileProc *) NULL, 1},
|
135 |
{"package", (Tcl_CmdProc *) NULL, Tcl_PackageObjCmd,
|
136 |
(CompileProc *) NULL, 1},
|
137 |
{"proc", (Tcl_CmdProc *) NULL, Tcl_ProcObjCmd,
|
138 |
(CompileProc *) NULL, 1},
|
139 |
{"regexp", (Tcl_CmdProc *) NULL, Tcl_RegexpObjCmd,
|
140 |
(CompileProc *) NULL, 1},
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141 |
{"regsub", (Tcl_CmdProc *) NULL, Tcl_RegsubObjCmd,
|
142 |
(CompileProc *) NULL, 1},
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143 |
{"rename", (Tcl_CmdProc *) NULL, Tcl_RenameObjCmd,
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144 |
(CompileProc *) NULL, 1},
|
145 |
{"return", (Tcl_CmdProc *) NULL, Tcl_ReturnObjCmd,
|
146 |
(CompileProc *) NULL, 1},
|
147 |
{"scan", (Tcl_CmdProc *) NULL, Tcl_ScanObjCmd,
|
148 |
(CompileProc *) NULL, 1},
|
149 |
{"set", (Tcl_CmdProc *) NULL, Tcl_SetObjCmd,
|
150 |
TclCompileSetCmd, 1},
|
151 |
{"split", (Tcl_CmdProc *) NULL, Tcl_SplitObjCmd,
|
152 |
(CompileProc *) NULL, 1},
|
153 |
{"string", (Tcl_CmdProc *) NULL, Tcl_StringObjCmd,
|
154 |
(CompileProc *) NULL, 1},
|
155 |
{"subst", (Tcl_CmdProc *) NULL, Tcl_SubstObjCmd,
|
156 |
(CompileProc *) NULL, 1},
|
157 |
{"switch", (Tcl_CmdProc *) NULL, Tcl_SwitchObjCmd,
|
158 |
(CompileProc *) NULL, 1},
|
159 |
{"trace", (Tcl_CmdProc *) NULL, Tcl_TraceObjCmd,
|
160 |
(CompileProc *) NULL, 1},
|
161 |
{"unset", (Tcl_CmdProc *) NULL, Tcl_UnsetObjCmd,
|
162 |
(CompileProc *) NULL, 1},
|
163 |
{"uplevel", (Tcl_CmdProc *) NULL, Tcl_UplevelObjCmd,
|
164 |
(CompileProc *) NULL, 1},
|
165 |
{"upvar", (Tcl_CmdProc *) NULL, Tcl_UpvarObjCmd,
|
166 |
(CompileProc *) NULL, 1},
|
167 |
{"variable", (Tcl_CmdProc *) NULL, Tcl_VariableObjCmd,
|
168 |
(CompileProc *) NULL, 1},
|
169 |
{"while", (Tcl_CmdProc *) NULL, Tcl_WhileObjCmd,
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170 |
TclCompileWhileCmd, 1},
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171 |
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172 |
/*
|
173 |
* Commands in the UNIX core:
|
174 |
*/
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175 |
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176 |
#ifndef TCL_GENERIC_ONLY
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177 |
{"after", (Tcl_CmdProc *) NULL, Tcl_AfterObjCmd,
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178 |
(CompileProc *) NULL, 1},
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179 |
{"cd", (Tcl_CmdProc *) NULL, Tcl_CdObjCmd,
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180 |
(CompileProc *) NULL, 0},
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181 |
{"close", (Tcl_CmdProc *) NULL, Tcl_CloseObjCmd,
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182 |
(CompileProc *) NULL, 1},
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183 |
{"eof", (Tcl_CmdProc *) NULL, Tcl_EofObjCmd,
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184 |
(CompileProc *) NULL, 1},
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185 |
{"fblocked", (Tcl_CmdProc *) NULL, Tcl_FblockedObjCmd,
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186 |
(CompileProc *) NULL, 1},
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187 |
{"fconfigure", (Tcl_CmdProc *) NULL, Tcl_FconfigureObjCmd,
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188 |
(CompileProc *) NULL, 0},
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189 |
{"file", (Tcl_CmdProc *) NULL, Tcl_FileObjCmd,
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190 |
(CompileProc *) NULL, 0},
|
191 |
{"flush", (Tcl_CmdProc *) NULL, Tcl_FlushObjCmd,
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192 |
(CompileProc *) NULL, 1},
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193 |
{"gets", (Tcl_CmdProc *) NULL, Tcl_GetsObjCmd,
|
194 |
(CompileProc *) NULL, 1},
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195 |
{"glob", (Tcl_CmdProc *) NULL, Tcl_GlobObjCmd,
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196 |
(CompileProc *) NULL, 0},
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197 |
{"open", (Tcl_CmdProc *) NULL, Tcl_OpenObjCmd,
|
198 |
(CompileProc *) NULL, 0},
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199 |
{"pid", (Tcl_CmdProc *) NULL, Tcl_PidObjCmd,
|
200 |
(CompileProc *) NULL, 1},
|
201 |
{"puts", (Tcl_CmdProc *) NULL, Tcl_PutsObjCmd,
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202 |
(CompileProc *) NULL, 1},
|
203 |
{"pwd", (Tcl_CmdProc *) NULL, Tcl_PwdObjCmd,
|
204 |
(CompileProc *) NULL, 0},
|
205 |
{"read", (Tcl_CmdProc *) NULL, Tcl_ReadObjCmd,
|
206 |
(CompileProc *) NULL, 1},
|
207 |
{"seek", (Tcl_CmdProc *) NULL, Tcl_SeekObjCmd,
|
208 |
(CompileProc *) NULL, 1},
|
209 |
{"socket", (Tcl_CmdProc *) NULL, Tcl_SocketObjCmd,
|
210 |
(CompileProc *) NULL, 0},
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211 |
{"tell", (Tcl_CmdProc *) NULL, Tcl_TellObjCmd,
|
212 |
(CompileProc *) NULL, 1},
|
213 |
{"time", (Tcl_CmdProc *) NULL, Tcl_TimeObjCmd,
|
214 |
(CompileProc *) NULL, 1},
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215 |
{"update", (Tcl_CmdProc *) NULL, Tcl_UpdateObjCmd,
|
216 |
(CompileProc *) NULL, 1},
|
217 |
{"vwait", (Tcl_CmdProc *) NULL, Tcl_VwaitObjCmd,
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218 |
(CompileProc *) NULL, 1},
|
219 |
|
220 |
#ifdef MAC_TCL
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221 |
{"beep", (Tcl_CmdProc *) NULL, Tcl_BeepObjCmd,
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222 |
(CompileProc *) NULL, 0},
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223 |
{"echo", Tcl_EchoCmd, (Tcl_ObjCmdProc *) NULL,
|
224 |
(CompileProc *) NULL, 0},
|
225 |
{"ls", (Tcl_CmdProc *) NULL, Tcl_LsObjCmd,
|
226 |
(CompileProc *) NULL, 0},
|
227 |
{"resource", (Tcl_CmdProc *) NULL, Tcl_ResourceObjCmd,
|
228 |
(CompileProc *) NULL, 1},
|
229 |
{"source", (Tcl_CmdProc *) NULL, Tcl_MacSourceObjCmd,
|
230 |
(CompileProc *) NULL, 0},
|
231 |
#else
|
232 |
{"exec", (Tcl_CmdProc *) NULL, Tcl_ExecObjCmd,
|
233 |
(CompileProc *) NULL, 0},
|
234 |
{"source", (Tcl_CmdProc *) NULL, Tcl_SourceObjCmd,
|
235 |
(CompileProc *) NULL, 0},
|
236 |
#endif /* MAC_TCL */
|
237 |
|
238 |
#endif /* TCL_GENERIC_ONLY */
|
239 |
{NULL, (Tcl_CmdProc *) NULL, (Tcl_ObjCmdProc *) NULL,
|
240 |
(CompileProc *) NULL, 0}
|
241 |
};
|
242 |
|
243 |
|
244 |
/*
|
245 |
*----------------------------------------------------------------------
|
246 |
*
|
247 |
* Tcl_CreateInterp --
|
248 |
*
|
249 |
* Create a new TCL command interpreter.
|
250 |
*
|
251 |
* Results:
|
252 |
* The return value is a token for the interpreter, which may be
|
253 |
* used in calls to procedures like Tcl_CreateCmd, Tcl_Eval, or
|
254 |
* Tcl_DeleteInterp.
|
255 |
*
|
256 |
* Side effects:
|
257 |
* The command interpreter is initialized with an empty variable
|
258 |
* table and the built-in commands.
|
259 |
*
|
260 |
*----------------------------------------------------------------------
|
261 |
*/
|
262 |
|
263 |
Tcl_Interp *
|
264 |
Tcl_CreateInterp()
|
265 |
{
|
266 |
Interp *iPtr;
|
267 |
Tcl_Interp *interp;
|
268 |
Command *cmdPtr;
|
269 |
BuiltinFunc *builtinFuncPtr;
|
270 |
MathFunc *mathFuncPtr;
|
271 |
Tcl_HashEntry *hPtr;
|
272 |
CmdInfo *cmdInfoPtr;
|
273 |
int i;
|
274 |
union {
|
275 |
char c[sizeof(short)];
|
276 |
short s;
|
277 |
} order;
|
278 |
#ifdef TCL_COMPILE_STATS
|
279 |
ByteCodeStats *statsPtr;
|
280 |
#endif /* TCL_COMPILE_STATS */
|
281 |
|
282 |
TclInitSubsystems(NULL);
|
283 |
|
284 |
/*
|
285 |
* Panic if someone updated the CallFrame structure without
|
286 |
* also updating the Tcl_CallFrame structure (or vice versa).
|
287 |
*/
|
288 |
|
289 |
if (sizeof(Tcl_CallFrame) != sizeof(CallFrame)) {
|
290 |
/*NOTREACHED*/
|
291 |
panic("Tcl_CallFrame and CallFrame are not the same size");
|
292 |
}
|
293 |
|
294 |
/*
|
295 |
* Initialize support for namespaces and create the global namespace
|
296 |
* (whose name is ""; an alias is "::"). This also initializes the
|
297 |
* Tcl object type table and other object management code.
|
298 |
*/
|
299 |
|
300 |
iPtr = (Interp *) ckalloc(sizeof(Interp));
|
301 |
interp = (Tcl_Interp *) iPtr;
|
302 |
|
303 |
iPtr->result = iPtr->resultSpace;
|
304 |
iPtr->freeProc = NULL;
|
305 |
iPtr->errorLine = 0;
|
306 |
iPtr->objResultPtr = Tcl_NewObj();
|
307 |
Tcl_IncrRefCount(iPtr->objResultPtr);
|
308 |
iPtr->handle = TclHandleCreate(iPtr);
|
309 |
iPtr->globalNsPtr = NULL;
|
310 |
iPtr->hiddenCmdTablePtr = NULL;
|
311 |
iPtr->interpInfo = NULL;
|
312 |
Tcl_InitHashTable(&iPtr->mathFuncTable, TCL_STRING_KEYS);
|
313 |
|
314 |
iPtr->numLevels = 0;
|
315 |
iPtr->maxNestingDepth = 1000;
|
316 |
iPtr->framePtr = NULL;
|
317 |
iPtr->varFramePtr = NULL;
|
318 |
iPtr->activeTracePtr = NULL;
|
319 |
iPtr->returnCode = TCL_OK;
|
320 |
iPtr->errorInfo = NULL;
|
321 |
iPtr->errorCode = NULL;
|
322 |
|
323 |
iPtr->appendResult = NULL;
|
324 |
iPtr->appendAvl = 0;
|
325 |
iPtr->appendUsed = 0;
|
326 |
|
327 |
Tcl_InitHashTable(&iPtr->packageTable, TCL_STRING_KEYS);
|
328 |
iPtr->packageUnknown = NULL;
|
329 |
iPtr->cmdCount = 0;
|
330 |
iPtr->termOffset = 0;
|
331 |
TclInitLiteralTable(&(iPtr->literalTable));
|
332 |
iPtr->compileEpoch = 0;
|
333 |
iPtr->compiledProcPtr = NULL;
|
334 |
iPtr->resolverPtr = NULL;
|
335 |
iPtr->evalFlags = 0;
|
336 |
iPtr->scriptFile = NULL;
|
337 |
iPtr->flags = 0;
|
338 |
iPtr->tracePtr = NULL;
|
339 |
iPtr->assocData = (Tcl_HashTable *) NULL;
|
340 |
iPtr->execEnvPtr = NULL; /* set after namespaces initialized */
|
341 |
iPtr->emptyObjPtr = Tcl_NewObj(); /* another empty object */
|
342 |
Tcl_IncrRefCount(iPtr->emptyObjPtr);
|
343 |
iPtr->resultSpace[0] = 0;
|
344 |
|
345 |
iPtr->globalNsPtr = NULL; /* force creation of global ns below */
|
346 |
iPtr->globalNsPtr = (Namespace *) Tcl_CreateNamespace(interp, "",
|
347 |
(ClientData) NULL, (Tcl_NamespaceDeleteProc *) NULL);
|
348 |
if (iPtr->globalNsPtr == NULL) {
|
349 |
panic("Tcl_CreateInterp: can't create global namespace");
|
350 |
}
|
351 |
|
352 |
/*
|
353 |
* Initialize support for code compilation and execution. We call
|
354 |
* TclCreateExecEnv after initializing namespaces since it tries to
|
355 |
* reference a Tcl variable (it links to the Tcl "tcl_traceExec"
|
356 |
* variable).
|
357 |
*/
|
358 |
|
359 |
iPtr->execEnvPtr = TclCreateExecEnv(interp);
|
360 |
|
361 |
/*
|
362 |
* Initialize the compilation and execution statistics kept for this
|
363 |
* interpreter.
|
364 |
*/
|
365 |
|
366 |
#ifdef TCL_COMPILE_STATS
|
367 |
statsPtr = &(iPtr->stats);
|
368 |
statsPtr->numExecutions = 0;
|
369 |
statsPtr->numCompilations = 0;
|
370 |
statsPtr->numByteCodesFreed = 0;
|
371 |
(VOID *) memset(statsPtr->instructionCount, 0,
|
372 |
sizeof(statsPtr->instructionCount));
|
373 |
|
374 |
statsPtr->totalSrcBytes = 0.0;
|
375 |
statsPtr->totalByteCodeBytes = 0.0;
|
376 |
statsPtr->currentSrcBytes = 0.0;
|
377 |
statsPtr->currentByteCodeBytes = 0.0;
|
378 |
(VOID *) memset(statsPtr->srcCount, 0, sizeof(statsPtr->srcCount));
|
379 |
(VOID *) memset(statsPtr->byteCodeCount, 0,
|
380 |
sizeof(statsPtr->byteCodeCount));
|
381 |
(VOID *) memset(statsPtr->lifetimeCount, 0,
|
382 |
sizeof(statsPtr->lifetimeCount));
|
383 |
|
384 |
statsPtr->currentInstBytes = 0.0;
|
385 |
statsPtr->currentLitBytes = 0.0;
|
386 |
statsPtr->currentExceptBytes = 0.0;
|
387 |
statsPtr->currentAuxBytes = 0.0;
|
388 |
statsPtr->currentCmdMapBytes = 0.0;
|
389 |
|
390 |
statsPtr->numLiteralsCreated = 0;
|
391 |
statsPtr->totalLitStringBytes = 0.0;
|
392 |
statsPtr->currentLitStringBytes = 0.0;
|
393 |
(VOID *) memset(statsPtr->literalCount, 0,
|
394 |
sizeof(statsPtr->literalCount));
|
395 |
#endif /* TCL_COMPILE_STATS */
|
396 |
|
397 |
/*
|
398 |
* Initialise the stub table pointer.
|
399 |
*/
|
400 |
|
401 |
iPtr->stubTable = &tclStubs;
|
402 |
|
403 |
|
404 |
/*
|
405 |
* Create the core commands. Do it here, rather than calling
|
406 |
* Tcl_CreateCommand, because it's faster (there's no need to check for
|
407 |
* a pre-existing command by the same name). If a command has a
|
408 |
* Tcl_CmdProc but no Tcl_ObjCmdProc, set the Tcl_ObjCmdProc to
|
409 |
* TclInvokeStringCommand. This is an object-based wrapper procedure
|
410 |
* that extracts strings, calls the string procedure, and creates an
|
411 |
* object for the result. Similarly, if a command has a Tcl_ObjCmdProc
|
412 |
* but no Tcl_CmdProc, set the Tcl_CmdProc to TclInvokeObjectCommand.
|
413 |
*/
|
414 |
|
415 |
for (cmdInfoPtr = builtInCmds; cmdInfoPtr->name != NULL;
|
416 |
cmdInfoPtr++) {
|
417 |
int new;
|
418 |
Tcl_HashEntry *hPtr;
|
419 |
|
420 |
if ((cmdInfoPtr->proc == (Tcl_CmdProc *) NULL)
|
421 |
&& (cmdInfoPtr->objProc == (Tcl_ObjCmdProc *) NULL)
|
422 |
&& (cmdInfoPtr->compileProc == (CompileProc *) NULL)) {
|
423 |
panic("Tcl_CreateInterp: builtin command with NULL string and object command procs and a NULL compile proc\n");
|
424 |
}
|
425 |
|
426 |
hPtr = Tcl_CreateHashEntry(&iPtr->globalNsPtr->cmdTable,
|
427 |
cmdInfoPtr->name, &new);
|
428 |
if (new) {
|
429 |
cmdPtr = (Command *) ckalloc(sizeof(Command));
|
430 |
cmdPtr->hPtr = hPtr;
|
431 |
cmdPtr->nsPtr = iPtr->globalNsPtr;
|
432 |
cmdPtr->refCount = 1;
|
433 |
cmdPtr->cmdEpoch = 0;
|
434 |
cmdPtr->compileProc = cmdInfoPtr->compileProc;
|
435 |
if (cmdInfoPtr->proc == (Tcl_CmdProc *) NULL) {
|
436 |
cmdPtr->proc = TclInvokeObjectCommand;
|
437 |
cmdPtr->clientData = (ClientData) cmdPtr;
|
438 |
} else {
|
439 |
cmdPtr->proc = cmdInfoPtr->proc;
|
440 |
cmdPtr->clientData = (ClientData) NULL;
|
441 |
}
|
442 |
if (cmdInfoPtr->objProc == (Tcl_ObjCmdProc *) NULL) {
|
443 |
cmdPtr->objProc = TclInvokeStringCommand;
|
444 |
cmdPtr->objClientData = (ClientData) cmdPtr;
|
445 |
} else {
|
446 |
cmdPtr->objProc = cmdInfoPtr->objProc;
|
447 |
cmdPtr->objClientData = (ClientData) NULL;
|
448 |
}
|
449 |
cmdPtr->deleteProc = NULL;
|
450 |
cmdPtr->deleteData = (ClientData) NULL;
|
451 |
cmdPtr->deleted = 0;
|
452 |
cmdPtr->importRefPtr = NULL;
|
453 |
Tcl_SetHashValue(hPtr, cmdPtr);
|
454 |
}
|
455 |
}
|
456 |
|
457 |
/*
|
458 |
* Register the builtin math functions.
|
459 |
*/
|
460 |
|
461 |
i = 0;
|
462 |
for (builtinFuncPtr = builtinFuncTable; builtinFuncPtr->name != NULL;
|
463 |
builtinFuncPtr++) {
|
464 |
Tcl_CreateMathFunc((Tcl_Interp *) iPtr, builtinFuncPtr->name,
|
465 |
builtinFuncPtr->numArgs, builtinFuncPtr->argTypes,
|
466 |
(Tcl_MathProc *) NULL, (ClientData) 0);
|
467 |
hPtr = Tcl_FindHashEntry(&iPtr->mathFuncTable,
|
468 |
builtinFuncPtr->name);
|
469 |
if (hPtr == NULL) {
|
470 |
panic("Tcl_CreateInterp: Tcl_CreateMathFunc incorrectly registered '%s'", builtinFuncPtr->name);
|
471 |
return NULL;
|
472 |
}
|
473 |
mathFuncPtr = (MathFunc *) Tcl_GetHashValue(hPtr);
|
474 |
mathFuncPtr->builtinFuncIndex = i;
|
475 |
i++;
|
476 |
}
|
477 |
iPtr->flags |= EXPR_INITIALIZED;
|
478 |
|
479 |
/*
|
480 |
* Do Multiple/Safe Interps Tcl init stuff
|
481 |
*/
|
482 |
|
483 |
TclInterpInit(interp);
|
484 |
|
485 |
/*
|
486 |
* We used to create the "errorInfo" and "errorCode" global vars at this
|
487 |
* point because so much of the Tcl implementation assumes they already
|
488 |
* exist. This is not quite enough, however, since they can be unset
|
489 |
* at any time.
|
490 |
*
|
491 |
* There are 2 choices:
|
492 |
* + Check every place where a GetVar of those is used
|
493 |
* and the NULL result is not checked (like in tclLoad.c)
|
494 |
* + Make SetVar,... NULL friendly
|
495 |
* We choose the second option because :
|
496 |
* + It is easy and low cost to check for NULL pointer before
|
497 |
* calling strlen()
|
498 |
* + It can be helpfull to other people using those API
|
499 |
* + Passing a NULL value to those closest 'meaning' is empty string
|
500 |
* (specially with the new objects where 0 bytes strings are ok)
|
501 |
* So the following init is commented out: -- dl
|
502 |
*
|
503 |
* (void) Tcl_SetVar2((Tcl_Interp *)iPtr, "errorInfo", (char *) NULL,
|
504 |
* "", TCL_GLOBAL_ONLY);
|
505 |
* (void) Tcl_SetVar2((Tcl_Interp *)iPtr, "errorCode", (char *) NULL,
|
506 |
* "NONE", TCL_GLOBAL_ONLY);
|
507 |
*/
|
508 |
|
509 |
#ifndef TCL_GENERIC_ONLY
|
510 |
TclSetupEnv(interp);
|
511 |
#endif
|
512 |
|
513 |
/*
|
514 |
* Compute the byte order of this machine.
|
515 |
*/
|
516 |
|
517 |
order.s = 1;
|
518 |
Tcl_SetVar2(interp, "tcl_platform", "byteOrder",
|
519 |
((order.c[0] == 1) ? "littleEndian" : "bigEndian"),
|
520 |
TCL_GLOBAL_ONLY);
|
521 |
|
522 |
/*
|
523 |
* Set up other variables such as tcl_version and tcl_library
|
524 |
*/
|
525 |
|
526 |
Tcl_SetVar(interp, "tcl_patchLevel", TCL_PATCH_LEVEL, TCL_GLOBAL_ONLY);
|
527 |
Tcl_SetVar(interp, "tcl_version", TCL_VERSION, TCL_GLOBAL_ONLY);
|
528 |
Tcl_TraceVar2(interp, "tcl_precision", (char *) NULL,
|
529 |
TCL_GLOBAL_ONLY|TCL_TRACE_READS|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
|
530 |
TclPrecTraceProc, (ClientData) NULL);
|
531 |
TclpSetVariables(interp);
|
532 |
|
533 |
#ifdef TCL_THREADS
|
534 |
/*
|
535 |
* The existence of the "threaded" element of the tcl_platform array indicates
|
536 |
* that this particular Tcl shell has been compiled with threads turned on.
|
537 |
* Using "info exists tcl_platform(threaded)" a Tcl script can introspect on the
|
538 |
* interpreter level of thread safety.
|
539 |
*/
|
540 |
|
541 |
|
542 |
Tcl_SetVar2(interp, "tcl_platform", "threaded", "1",
|
543 |
TCL_GLOBAL_ONLY);
|
544 |
#endif
|
545 |
|
546 |
/*
|
547 |
* Register Tcl's version number.
|
548 |
*/
|
549 |
|
550 |
Tcl_PkgProvideEx(interp, "Tcl", TCL_VERSION, (ClientData) &tclStubs);
|
551 |
|
552 |
#ifdef Tcl_InitStubs
|
553 |
#undef Tcl_InitStubs
|
554 |
#endif
|
555 |
Tcl_InitStubs(interp, TCL_VERSION, 1);
|
556 |
|
557 |
return interp;
|
558 |
}
|
559 |
|
560 |
/*
|
561 |
*----------------------------------------------------------------------
|
562 |
*
|
563 |
* TclHideUnsafeCommands --
|
564 |
*
|
565 |
* Hides base commands that are not marked as safe from this
|
566 |
* interpreter.
|
567 |
*
|
568 |
* Results:
|
569 |
* TCL_OK if it succeeds, TCL_ERROR else.
|
570 |
*
|
571 |
* Side effects:
|
572 |
* Hides functionality in an interpreter.
|
573 |
*
|
574 |
*----------------------------------------------------------------------
|
575 |
*/
|
576 |
|
577 |
int
|
578 |
TclHideUnsafeCommands(interp)
|
579 |
Tcl_Interp *interp; /* Hide commands in this interpreter. */
|
580 |
{
|
581 |
register CmdInfo *cmdInfoPtr;
|
582 |
|
583 |
if (interp == (Tcl_Interp *) NULL) {
|
584 |
return TCL_ERROR;
|
585 |
}
|
586 |
for (cmdInfoPtr = builtInCmds; cmdInfoPtr->name != NULL; cmdInfoPtr++) {
|
587 |
if (!cmdInfoPtr->isSafe) {
|
588 |
Tcl_HideCommand(interp, cmdInfoPtr->name, cmdInfoPtr->name);
|
589 |
}
|
590 |
}
|
591 |
return TCL_OK;
|
592 |
}
|
593 |
|
594 |
/*
|
595 |
*--------------------------------------------------------------
|
596 |
*
|
597 |
* Tcl_CallWhenDeleted --
|
598 |
*
|
599 |
* Arrange for a procedure to be called before a given
|
600 |
* interpreter is deleted. The procedure is called as soon
|
601 |
* as Tcl_DeleteInterp is called; if Tcl_CallWhenDeleted is
|
602 |
* called on an interpreter that has already been deleted,
|
603 |
* the procedure will be called when the last Tcl_Release is
|
604 |
* done on the interpreter.
|
605 |
*
|
606 |
* Results:
|
607 |
* None.
|
608 |
*
|
609 |
* Side effects:
|
610 |
* When Tcl_DeleteInterp is invoked to delete interp,
|
611 |
* proc will be invoked. See the manual entry for
|
612 |
* details.
|
613 |
*
|
614 |
*--------------------------------------------------------------
|
615 |
*/
|
616 |
|
617 |
void
|
618 |
Tcl_CallWhenDeleted(interp, proc, clientData)
|
619 |
Tcl_Interp *interp; /* Interpreter to watch. */
|
620 |
Tcl_InterpDeleteProc *proc; /* Procedure to call when interpreter
|
621 |
* is about to be deleted. */
|
622 |
ClientData clientData; /* One-word value to pass to proc. */
|
623 |
{
|
624 |
Interp *iPtr = (Interp *) interp;
|
625 |
static int assocDataCounter = 0;
|
626 |
#ifdef TCL_THREADS
|
627 |
static Tcl_Mutex assocMutex;
|
628 |
#endif
|
629 |
int new;
|
630 |
char buffer[32 + TCL_INTEGER_SPACE];
|
631 |
AssocData *dPtr = (AssocData *) ckalloc(sizeof(AssocData));
|
632 |
Tcl_HashEntry *hPtr;
|
633 |
|
634 |
Tcl_MutexLock(&assocMutex);
|
635 |
sprintf(buffer, "Assoc Data Key #%d", assocDataCounter);
|
636 |
assocDataCounter++;
|
637 |
Tcl_MutexUnlock(&assocMutex);
|
638 |
|
639 |
if (iPtr->assocData == (Tcl_HashTable *) NULL) {
|
640 |
iPtr->assocData = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable));
|
641 |
Tcl_InitHashTable(iPtr->assocData, TCL_STRING_KEYS);
|
642 |
}
|
643 |
hPtr = Tcl_CreateHashEntry(iPtr->assocData, buffer, &new);
|
644 |
dPtr->proc = proc;
|
645 |
dPtr->clientData = clientData;
|
646 |
Tcl_SetHashValue(hPtr, dPtr);
|
647 |
}
|
648 |
|
649 |
/*
|
650 |
*--------------------------------------------------------------
|
651 |
*
|
652 |
* Tcl_DontCallWhenDeleted --
|
653 |
*
|
654 |
* Cancel the arrangement for a procedure to be called when
|
655 |
* a given interpreter is deleted.
|
656 |
*
|
657 |
* Results:
|
658 |
* None.
|
659 |
*
|
660 |
* Side effects:
|
661 |
* If proc and clientData were previously registered as a
|
662 |
* callback via Tcl_CallWhenDeleted, they are unregistered.
|
663 |
* If they weren't previously registered then nothing
|
664 |
* happens.
|
665 |
*
|
666 |
*--------------------------------------------------------------
|
667 |
*/
|
668 |
|
669 |
void
|
670 |
Tcl_DontCallWhenDeleted(interp, proc, clientData)
|
671 |
Tcl_Interp *interp; /* Interpreter to watch. */
|
672 |
Tcl_InterpDeleteProc *proc; /* Procedure to call when interpreter
|
673 |
* is about to be deleted. */
|
674 |
ClientData clientData; /* One-word value to pass to proc. */
|
675 |
{
|
676 |
Interp *iPtr = (Interp *) interp;
|
677 |
Tcl_HashTable *hTablePtr;
|
678 |
Tcl_HashSearch hSearch;
|
679 |
Tcl_HashEntry *hPtr;
|
680 |
AssocData *dPtr;
|
681 |
|
682 |
hTablePtr = iPtr->assocData;
|
683 |
if (hTablePtr == (Tcl_HashTable *) NULL) {
|
684 |
return;
|
685 |
}
|
686 |
for (hPtr = Tcl_FirstHashEntry(hTablePtr, &hSearch); hPtr != NULL;
|
687 |
hPtr = Tcl_NextHashEntry(&hSearch)) {
|
688 |
dPtr = (AssocData *) Tcl_GetHashValue(hPtr);
|
689 |
if ((dPtr->proc == proc) && (dPtr->clientData == clientData)) {
|
690 |
ckfree((char *) dPtr);
|
691 |
Tcl_DeleteHashEntry(hPtr);
|
692 |
return;
|
693 |
}
|
694 |
}
|
695 |
}
|
696 |
|
697 |
/*
|
698 |
*----------------------------------------------------------------------
|
699 |
*
|
700 |
* Tcl_SetAssocData --
|
701 |
*
|
702 |
* Creates a named association between user-specified data, a delete
|
703 |
* function and this interpreter. If the association already exists
|
704 |
* the data is overwritten with the new data. The delete function will
|
705 |
* be invoked when the interpreter is deleted.
|
706 |
*
|
707 |
* Results:
|
708 |
* None.
|
709 |
*
|
710 |
* Side effects:
|
711 |
* Sets the associated data, creates the association if needed.
|
712 |
*
|
713 |
*----------------------------------------------------------------------
|
714 |
*/
|
715 |
|
716 |
void
|
717 |
Tcl_SetAssocData(interp, name, proc, clientData)
|
718 |
Tcl_Interp *interp; /* Interpreter to associate with. */
|
719 |
char *name; /* Name for association. */
|
720 |
Tcl_InterpDeleteProc *proc; /* Proc to call when interpreter is
|
721 |
* about to be deleted. */
|
722 |
ClientData clientData; /* One-word value to pass to proc. */
|
723 |
{
|
724 |
Interp *iPtr = (Interp *) interp;
|
725 |
AssocData *dPtr;
|
726 |
Tcl_HashEntry *hPtr;
|
727 |
int new;
|
728 |
|
729 |
if (iPtr->assocData == (Tcl_HashTable *) NULL) {
|
730 |
iPtr->assocData = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable));
|
731 |
Tcl_InitHashTable(iPtr->assocData, TCL_STRING_KEYS);
|
732 |
}
|
733 |
hPtr = Tcl_CreateHashEntry(iPtr->assocData, name, &new);
|
734 |
if (new == 0) {
|
735 |
dPtr = (AssocData *) Tcl_GetHashValue(hPtr);
|
736 |
} else {
|
737 |
dPtr = (AssocData *) ckalloc(sizeof(AssocData));
|
738 |
}
|
739 |
dPtr->proc = proc;
|
740 |
dPtr->clientData = clientData;
|
741 |
|
742 |
Tcl_SetHashValue(hPtr, dPtr);
|
743 |
}
|
744 |
|
745 |
/*
|
746 |
*----------------------------------------------------------------------
|
747 |
*
|
748 |
* Tcl_DeleteAssocData --
|
749 |
*
|
750 |
* Deletes a named association of user-specified data with
|
751 |
* the specified interpreter.
|
752 |
*
|
753 |
* Results:
|
754 |
* None.
|
755 |
*
|
756 |
* Side effects:
|
757 |
* Deletes the association.
|
758 |
*
|
759 |
*----------------------------------------------------------------------
|
760 |
*/
|
761 |
|
762 |
void
|
763 |
Tcl_DeleteAssocData(interp, name)
|
764 |
Tcl_Interp *interp; /* Interpreter to associate with. */
|
765 |
char *name; /* Name of association. */
|
766 |
{
|
767 |
Interp *iPtr = (Interp *) interp;
|
768 |
AssocData *dPtr;
|
769 |
Tcl_HashEntry *hPtr;
|
770 |
|
771 |
if (iPtr->assocData == (Tcl_HashTable *) NULL) {
|
772 |
return;
|
773 |
}
|
774 |
hPtr = Tcl_FindHashEntry(iPtr->assocData, name);
|
775 |
if (hPtr == (Tcl_HashEntry *) NULL) {
|
776 |
return;
|
777 |
}
|
778 |
dPtr = (AssocData *) Tcl_GetHashValue(hPtr);
|
779 |
if (dPtr->proc != NULL) {
|
780 |
(dPtr->proc) (dPtr->clientData, interp);
|
781 |
}
|
782 |
ckfree((char *) dPtr);
|
783 |
Tcl_DeleteHashEntry(hPtr);
|
784 |
}
|
785 |
|
786 |
/*
|
787 |
*----------------------------------------------------------------------
|
788 |
*
|
789 |
* Tcl_GetAssocData --
|
790 |
*
|
791 |
* Returns the client data associated with this name in the
|
792 |
* specified interpreter.
|
793 |
*
|
794 |
* Results:
|
795 |
* The client data in the AssocData record denoted by the named
|
796 |
* association, or NULL.
|
797 |
*
|
798 |
* Side effects:
|
799 |
* None.
|
800 |
*
|
801 |
*----------------------------------------------------------------------
|
802 |
*/
|
803 |
|
804 |
ClientData
|
805 |
Tcl_GetAssocData(interp, name, procPtr)
|
806 |
Tcl_Interp *interp; /* Interpreter associated with. */
|
807 |
char *name; /* Name of association. */
|
808 |
Tcl_InterpDeleteProc **procPtr; /* Pointer to place to store address
|
809 |
* of current deletion callback. */
|
810 |
{
|
811 |
Interp *iPtr = (Interp *) interp;
|
812 |
AssocData *dPtr;
|
813 |
Tcl_HashEntry *hPtr;
|
814 |
|
815 |
if (iPtr->assocData == (Tcl_HashTable *) NULL) {
|
816 |
return (ClientData) NULL;
|
817 |
}
|
818 |
hPtr = Tcl_FindHashEntry(iPtr->assocData, name);
|
819 |
if (hPtr == (Tcl_HashEntry *) NULL) {
|
820 |
return (ClientData) NULL;
|
821 |
}
|
822 |
dPtr = (AssocData *) Tcl_GetHashValue(hPtr);
|
823 |
if (procPtr != (Tcl_InterpDeleteProc **) NULL) {
|
824 |
*procPtr = dPtr->proc;
|
825 |
}
|
826 |
return dPtr->clientData;
|
827 |
}
|
828 |
|
829 |
/*
|
830 |
*----------------------------------------------------------------------
|
831 |
*
|
832 |
* Tcl_InterpDeleted --
|
833 |
*
|
834 |
* Returns nonzero if the interpreter has been deleted with a call
|
835 |
* to Tcl_DeleteInterp.
|
836 |
*
|
837 |
* Results:
|
838 |
* Nonzero if the interpreter is deleted, zero otherwise.
|
839 |
*
|
840 |
* Side effects:
|
841 |
* None.
|
842 |
*
|
843 |
*----------------------------------------------------------------------
|
844 |
*/
|
845 |
|
846 |
int
|
847 |
Tcl_InterpDeleted(interp)
|
848 |
Tcl_Interp *interp;
|
849 |
{
|
850 |
return (((Interp *) interp)->flags & DELETED) ? 1 : 0;
|
851 |
}
|
852 |
|
853 |
/*
|
854 |
*----------------------------------------------------------------------
|
855 |
*
|
856 |
* Tcl_DeleteInterp --
|
857 |
*
|
858 |
* Ensures that the interpreter will be deleted eventually. If there
|
859 |
* are no Tcl_Preserve calls in effect for this interpreter, it is
|
860 |
* deleted immediately, otherwise the interpreter is deleted when
|
861 |
* the last Tcl_Preserve is matched by a call to Tcl_Release. In either
|
862 |
* case, the procedure runs the currently registered deletion callbacks.
|
863 |
*
|
864 |
* Results:
|
865 |
* None.
|
866 |
*
|
867 |
* Side effects:
|
868 |
* The interpreter is marked as deleted. The caller may still use it
|
869 |
* safely if there are calls to Tcl_Preserve in effect for the
|
870 |
* interpreter, but further calls to Tcl_Eval etc in this interpreter
|
871 |
* will fail.
|
872 |
*
|
873 |
*----------------------------------------------------------------------
|
874 |
*/
|
875 |
|
876 |
void
|
877 |
Tcl_DeleteInterp(interp)
|
878 |
Tcl_Interp *interp; /* Token for command interpreter (returned
|
879 |
* by a previous call to Tcl_CreateInterp). */
|
880 |
{
|
881 |
Interp *iPtr = (Interp *) interp;
|
882 |
|
883 |
/*
|
884 |
* If the interpreter has already been marked deleted, just punt.
|
885 |
*/
|
886 |
|
887 |
if (iPtr->flags & DELETED) {
|
888 |
return;
|
889 |
}
|
890 |
|
891 |
/*
|
892 |
* Mark the interpreter as deleted. No further evals will be allowed.
|
893 |
*/
|
894 |
|
895 |
iPtr->flags |= DELETED;
|
896 |
|
897 |
/*
|
898 |
* Ensure that the interpreter is eventually deleted.
|
899 |
*/
|
900 |
|
901 |
Tcl_EventuallyFree((ClientData) interp,
|
902 |
(Tcl_FreeProc *) DeleteInterpProc);
|
903 |
}
|
904 |
|
905 |
/*
|
906 |
*----------------------------------------------------------------------
|
907 |
*
|
908 |
* DeleteInterpProc --
|
909 |
*
|
910 |
* Helper procedure to delete an interpreter. This procedure is
|
911 |
* called when the last call to Tcl_Preserve on this interpreter
|
912 |
* is matched by a call to Tcl_Release. The procedure cleans up
|
913 |
* all resources used in the interpreter and calls all currently
|
914 |
* registered interpreter deletion callbacks.
|
915 |
*
|
916 |
* Results:
|
917 |
* None.
|
918 |
*
|
919 |
* Side effects:
|
920 |
* Whatever the interpreter deletion callbacks do. Frees resources
|
921 |
* used by the interpreter.
|
922 |
*
|
923 |
*----------------------------------------------------------------------
|
924 |
*/
|
925 |
|
926 |
static void
|
927 |
DeleteInterpProc(interp)
|
928 |
Tcl_Interp *interp; /* Interpreter to delete. */
|
929 |
{
|
930 |
Interp *iPtr = (Interp *) interp;
|
931 |
Tcl_HashEntry *hPtr;
|
932 |
Tcl_HashSearch search;
|
933 |
Tcl_HashTable *hTablePtr;
|
934 |
ResolverScheme *resPtr, *nextResPtr;
|
935 |
|
936 |
/*
|
937 |
* Punt if there is an error in the Tcl_Release/Tcl_Preserve matchup.
|
938 |
*/
|
939 |
|
940 |
if (iPtr->numLevels > 0) {
|
941 |
panic("DeleteInterpProc called with active evals");
|
942 |
}
|
943 |
|
944 |
/*
|
945 |
* The interpreter should already be marked deleted; otherwise how
|
946 |
* did we get here?
|
947 |
*/
|
948 |
|
949 |
if (!(iPtr->flags & DELETED)) {
|
950 |
panic("DeleteInterpProc called on interpreter not marked deleted");
|
951 |
}
|
952 |
|
953 |
TclHandleFree(iPtr->handle);
|
954 |
|
955 |
/*
|
956 |
* Dismantle everything in the global namespace except for the
|
957 |
* "errorInfo" and "errorCode" variables. These remain until the
|
958 |
* namespace is actually destroyed, in case any errors occur.
|
959 |
*
|
960 |
* Dismantle the namespace here, before we clear the assocData. If any
|
961 |
* background errors occur here, they will be deleted below.
|
962 |
*/
|
963 |
|
964 |
TclTeardownNamespace(iPtr->globalNsPtr);
|
965 |
|
966 |
/*
|
967 |
* Delete all the hidden commands.
|
968 |
*/
|
969 |
|
970 |
hTablePtr = iPtr->hiddenCmdTablePtr;
|
971 |
if (hTablePtr != NULL) {
|
972 |
/*
|
973 |
* Non-pernicious deletion. The deletion callbacks will not be
|
974 |
* allowed to create any new hidden or non-hidden commands.
|
975 |
* Tcl_DeleteCommandFromToken() will remove the entry from the
|
976 |
* hiddenCmdTablePtr.
|
977 |
*/
|
978 |
|
979 |
hPtr = Tcl_FirstHashEntry(hTablePtr, &search);
|
980 |
for ( ; hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) {
|
981 |
Tcl_DeleteCommandFromToken(interp,
|
982 |
(Tcl_Command) Tcl_GetHashValue(hPtr));
|
983 |
}
|
984 |
Tcl_DeleteHashTable(hTablePtr);
|
985 |
ckfree((char *) hTablePtr);
|
986 |
}
|
987 |
/*
|
988 |
* Tear down the math function table.
|
989 |
*/
|
990 |
|
991 |
for (hPtr = Tcl_FirstHashEntry(&iPtr->mathFuncTable, &search);
|
992 |
hPtr != NULL;
|
993 |
hPtr = Tcl_NextHashEntry(&search)) {
|
994 |
ckfree((char *) Tcl_GetHashValue(hPtr));
|
995 |
}
|
996 |
Tcl_DeleteHashTable(&iPtr->mathFuncTable);
|
997 |
|
998 |
/*
|
999 |
* Invoke deletion callbacks; note that a callback can create new
|
1000 |
* callbacks, so we iterate.
|
1001 |
*/
|
1002 |
|
1003 |
while (iPtr->assocData != (Tcl_HashTable *) NULL) {
|
1004 |
AssocData *dPtr;
|
1005 |
|
1006 |
hTablePtr = iPtr->assocData;
|
1007 |
iPtr->assocData = (Tcl_HashTable *) NULL;
|
1008 |
for (hPtr = Tcl_FirstHashEntry(hTablePtr, &search);
|
1009 |
hPtr != NULL;
|
1010 |
hPtr = Tcl_FirstHashEntry(hTablePtr, &search)) {
|
1011 |
dPtr = (AssocData *) Tcl_GetHashValue(hPtr);
|
1012 |
Tcl_DeleteHashEntry(hPtr);
|
1013 |
if (dPtr->proc != NULL) {
|
1014 |
(*dPtr->proc)(dPtr->clientData, interp);
|
1015 |
}
|
1016 |
ckfree((char *) dPtr);
|
1017 |
}
|
1018 |
Tcl_DeleteHashTable(hTablePtr);
|
1019 |
ckfree((char *) hTablePtr);
|
1020 |
}
|
1021 |
|
1022 |
/*
|
1023 |
* Finish deleting the global namespace.
|
1024 |
*/
|
1025 |
|
1026 |
Tcl_DeleteNamespace((Tcl_Namespace *) iPtr->globalNsPtr);
|
1027 |
|
1028 |
/*
|
1029 |
* Free up the result *after* deleting variables, since variable
|
1030 |
* deletion could have transferred ownership of the result string
|
1031 |
* to Tcl.
|
1032 |
*/
|
1033 |
|
1034 |
Tcl_FreeResult(interp);
|
1035 |
interp->result = NULL;
|
1036 |
Tcl_DecrRefCount(iPtr->objResultPtr);
|
1037 |
iPtr->objResultPtr = NULL;
|
1038 |
if (iPtr->errorInfo != NULL) {
|
1039 |
ckfree(iPtr->errorInfo);
|
1040 |
iPtr->errorInfo = NULL;
|
1041 |
}
|
1042 |
if (iPtr->errorCode != NULL) {
|
1043 |
ckfree(iPtr->errorCode);
|
1044 |
iPtr->errorCode = NULL;
|
1045 |
}
|
1046 |
if (iPtr->appendResult != NULL) {
|
1047 |
ckfree(iPtr->appendResult);
|
1048 |
iPtr->appendResult = NULL;
|
1049 |
}
|
1050 |
TclFreePackageInfo(iPtr);
|
1051 |
while (iPtr->tracePtr != NULL) {
|
1052 |
Trace *nextPtr = iPtr->tracePtr->nextPtr;
|
1053 |
|
1054 |
ckfree((char *) iPtr->tracePtr);
|
1055 |
iPtr->tracePtr = nextPtr;
|
1056 |
}
|
1057 |
if (iPtr->execEnvPtr != NULL) {
|
1058 |
TclDeleteExecEnv(iPtr->execEnvPtr);
|
1059 |
}
|
1060 |
Tcl_DecrRefCount(iPtr->emptyObjPtr);
|
1061 |
iPtr->emptyObjPtr = NULL;
|
1062 |
|
1063 |
resPtr = iPtr->resolverPtr;
|
1064 |
while (resPtr) {
|
1065 |
nextResPtr = resPtr->nextPtr;
|
1066 |
ckfree(resPtr->name);
|
1067 |
ckfree((char *) resPtr);
|
1068 |
resPtr = nextResPtr;
|
1069 |
}
|
1070 |
|
1071 |
/*
|
1072 |
* Free up literal objects created for scripts compiled by the
|
1073 |
* interpreter.
|
1074 |
*/
|
1075 |
|
1076 |
TclDeleteLiteralTable(interp, &(iPtr->literalTable));
|
1077 |
ckfree((char *) iPtr);
|
1078 |
}
|
1079 |
|
1080 |
/*
|
1081 |
*---------------------------------------------------------------------------
|
1082 |
*
|
1083 |
* Tcl_HideCommand --
|
1084 |
*
|
1085 |
* Makes a command hidden so that it cannot be invoked from within
|
1086 |
* an interpreter, only from within an ancestor.
|
1087 |
*
|
1088 |
* Results:
|
1089 |
* A standard Tcl result; also leaves a message in the interp's result
|
1090 |
* if an error occurs.
|
1091 |
*
|
1092 |
* Side effects:
|
1093 |
* Removes a command from the command table and create an entry
|
1094 |
* into the hidden command table under the specified token name.
|
1095 |
*
|
1096 |
*---------------------------------------------------------------------------
|
1097 |
*/
|
1098 |
|
1099 |
int
|
1100 |
Tcl_HideCommand(interp, cmdName, hiddenCmdToken)
|
1101 |
Tcl_Interp *interp; /* Interpreter in which to hide command. */
|
1102 |
char *cmdName; /* Name of command to hide. */
|
1103 |
char *hiddenCmdToken; /* Token name of the to-be-hidden command. */
|
1104 |
{
|
1105 |
Interp *iPtr = (Interp *) interp;
|
1106 |
Tcl_Command cmd;
|
1107 |
Command *cmdPtr;
|
1108 |
Tcl_HashTable *hiddenCmdTablePtr;
|
1109 |
Tcl_HashEntry *hPtr;
|
1110 |
int new;
|
1111 |
|
1112 |
if (iPtr->flags & DELETED) {
|
1113 |
|
1114 |
/*
|
1115 |
* The interpreter is being deleted. Do not create any new
|
1116 |
* structures, because it is not safe to modify the interpreter.
|
1117 |
*/
|
1118 |
|
1119 |
return TCL_ERROR;
|
1120 |
}
|
1121 |
|
1122 |
/*
|
1123 |
* Disallow hiding of commands that are currently in a namespace or
|
1124 |
* renaming (as part of hiding) into a namespace.
|
1125 |
*
|
1126 |
* (because the current implementation with a single global table
|
1127 |
* and the needed uniqueness of names cause problems with namespaces)
|
1128 |
*
|
1129 |
* we don't need to check for "::" in cmdName because the real check is
|
1130 |
* on the nsPtr below.
|
1131 |
*
|
1132 |
* hiddenCmdToken is just a string which is not interpreted in any way.
|
1133 |
* It may contain :: but the string is not interpreted as a namespace
|
1134 |
* qualifier command name. Thus, hiding foo::bar to foo::bar and then
|
1135 |
* trying to expose or invoke ::foo::bar will NOT work; but if the
|
1136 |
* application always uses the same strings it will get consistent
|
1137 |
* behaviour.
|
1138 |
*
|
1139 |
* But as we currently limit ourselves to the global namespace only
|
1140 |
* for the source, in order to avoid potential confusion,
|
1141 |
* lets prevent "::" in the token too. --dl
|
1142 |
*/
|
1143 |
|
1144 |
if (strstr(hiddenCmdToken, "::") != NULL) {
|
1145 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1146 |
"cannot use namespace qualifiers as hidden command",
|
1147 |
"token (rename)", (char *) NULL);
|
1148 |
return TCL_ERROR;
|
1149 |
}
|
1150 |
|
1151 |
/*
|
1152 |
* Find the command to hide. An error is returned if cmdName can't
|
1153 |
* be found. Look up the command only from the global namespace.
|
1154 |
* Full path of the command must be given if using namespaces.
|
1155 |
*/
|
1156 |
|
1157 |
cmd = Tcl_FindCommand(interp, cmdName, (Tcl_Namespace *) NULL,
|
1158 |
/*flags*/ TCL_LEAVE_ERR_MSG | TCL_GLOBAL_ONLY);
|
1159 |
if (cmd == (Tcl_Command) NULL) {
|
1160 |
return TCL_ERROR;
|
1161 |
}
|
1162 |
cmdPtr = (Command *) cmd;
|
1163 |
|
1164 |
/*
|
1165 |
* Check that the command is really in global namespace
|
1166 |
*/
|
1167 |
|
1168 |
if ( cmdPtr->nsPtr != iPtr->globalNsPtr ) {
|
1169 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1170 |
"can only hide global namespace commands",
|
1171 |
" (use rename then hide)", (char *) NULL);
|
1172 |
return TCL_ERROR;
|
1173 |
}
|
1174 |
|
1175 |
/*
|
1176 |
* Initialize the hidden command table if necessary.
|
1177 |
*/
|
1178 |
|
1179 |
hiddenCmdTablePtr = iPtr->hiddenCmdTablePtr;
|
1180 |
if (hiddenCmdTablePtr == NULL) {
|
1181 |
hiddenCmdTablePtr = (Tcl_HashTable *)
|
1182 |
ckalloc((unsigned) sizeof(Tcl_HashTable));
|
1183 |
Tcl_InitHashTable(hiddenCmdTablePtr, TCL_STRING_KEYS);
|
1184 |
iPtr->hiddenCmdTablePtr = hiddenCmdTablePtr;
|
1185 |
}
|
1186 |
|
1187 |
/*
|
1188 |
* It is an error to move an exposed command to a hidden command with
|
1189 |
* hiddenCmdToken if a hidden command with the name hiddenCmdToken already
|
1190 |
* exists.
|
1191 |
*/
|
1192 |
|
1193 |
hPtr = Tcl_CreateHashEntry(hiddenCmdTablePtr, hiddenCmdToken, &new);
|
1194 |
if (!new) {
|
1195 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1196 |
"hidden command named \"", hiddenCmdToken, "\" already exists",
|
1197 |
(char *) NULL);
|
1198 |
return TCL_ERROR;
|
1199 |
}
|
1200 |
|
1201 |
/*
|
1202 |
* Nb : This code is currently 'like' a rename to a specialy set apart
|
1203 |
* name table. Changes here and in TclRenameCommand must
|
1204 |
* be kept in synch untill the common parts are actually
|
1205 |
* factorized out.
|
1206 |
*/
|
1207 |
|
1208 |
/*
|
1209 |
* Remove the hash entry for the command from the interpreter command
|
1210 |
* table. This is like deleting the command, so bump its command epoch;
|
1211 |
* this invalidates any cached references that point to the command.
|
1212 |
*/
|
1213 |
|
1214 |
if (cmdPtr->hPtr != NULL) {
|
1215 |
Tcl_DeleteHashEntry(cmdPtr->hPtr);
|
1216 |
cmdPtr->hPtr = (Tcl_HashEntry *) NULL;
|
1217 |
cmdPtr->cmdEpoch++;
|
1218 |
}
|
1219 |
|
1220 |
/*
|
1221 |
* Now link the hash table entry with the command structure.
|
1222 |
* We ensured above that the nsPtr was right.
|
1223 |
*/
|
1224 |
|
1225 |
cmdPtr->hPtr = hPtr;
|
1226 |
Tcl_SetHashValue(hPtr, (ClientData) cmdPtr);
|
1227 |
|
1228 |
/*
|
1229 |
* If the command being hidden has a compile procedure, increment the
|
1230 |
* interpreter's compileEpoch to invalidate its compiled code. This
|
1231 |
* makes sure that we don't later try to execute old code compiled with
|
1232 |
* command-specific (i.e., inline) bytecodes for the now-hidden
|
1233 |
* command. This field is checked in Tcl_EvalObj and ObjInterpProc,
|
1234 |
* and code whose compilation epoch doesn't match is recompiled.
|
1235 |
*/
|
1236 |
|
1237 |
if (cmdPtr->compileProc != NULL) {
|
1238 |
iPtr->compileEpoch++;
|
1239 |
}
|
1240 |
return TCL_OK;
|
1241 |
}
|
1242 |
|
1243 |
/*
|
1244 |
*----------------------------------------------------------------------
|
1245 |
*
|
1246 |
* Tcl_ExposeCommand --
|
1247 |
*
|
1248 |
* Makes a previously hidden command callable from inside the
|
1249 |
* interpreter instead of only by its ancestors.
|
1250 |
*
|
1251 |
* Results:
|
1252 |
* A standard Tcl result. If an error occurs, a message is left
|
1253 |
* in the interp's result.
|
1254 |
*
|
1255 |
* Side effects:
|
1256 |
* Moves commands from one hash table to another.
|
1257 |
*
|
1258 |
*----------------------------------------------------------------------
|
1259 |
*/
|
1260 |
|
1261 |
int
|
1262 |
Tcl_ExposeCommand(interp, hiddenCmdToken, cmdName)
|
1263 |
Tcl_Interp *interp; /* Interpreter in which to make command
|
1264 |
* callable. */
|
1265 |
char *hiddenCmdToken; /* Name of hidden command. */
|
1266 |
char *cmdName; /* Name of to-be-exposed command. */
|
1267 |
{
|
1268 |
Interp *iPtr = (Interp *) interp;
|
1269 |
Command *cmdPtr;
|
1270 |
Namespace *nsPtr;
|
1271 |
Tcl_HashEntry *hPtr;
|
1272 |
Tcl_HashTable *hiddenCmdTablePtr;
|
1273 |
int new;
|
1274 |
|
1275 |
if (iPtr->flags & DELETED) {
|
1276 |
/*
|
1277 |
* The interpreter is being deleted. Do not create any new
|
1278 |
* structures, because it is not safe to modify the interpreter.
|
1279 |
*/
|
1280 |
|
1281 |
return TCL_ERROR;
|
1282 |
}
|
1283 |
|
1284 |
/*
|
1285 |
* Check that we have a regular name for the command
|
1286 |
* (that the user is not trying to do an expose and a rename
|
1287 |
* (to another namespace) at the same time)
|
1288 |
*/
|
1289 |
|
1290 |
if (strstr(cmdName, "::") != NULL) {
|
1291 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1292 |
"can not expose to a namespace ",
|
1293 |
"(use expose to toplevel, then rename)",
|
1294 |
(char *) NULL);
|
1295 |
return TCL_ERROR;
|
1296 |
}
|
1297 |
|
1298 |
/*
|
1299 |
* Get the command from the hidden command table:
|
1300 |
*/
|
1301 |
|
1302 |
hPtr = NULL;
|
1303 |
hiddenCmdTablePtr = iPtr->hiddenCmdTablePtr;
|
1304 |
if (hiddenCmdTablePtr != NULL) {
|
1305 |
hPtr = Tcl_FindHashEntry(hiddenCmdTablePtr, hiddenCmdToken);
|
1306 |
}
|
1307 |
if (hPtr == (Tcl_HashEntry *) NULL) {
|
1308 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1309 |
"unknown hidden command \"", hiddenCmdToken,
|
1310 |
"\"", (char *) NULL);
|
1311 |
return TCL_ERROR;
|
1312 |
}
|
1313 |
cmdPtr = (Command *) Tcl_GetHashValue(hPtr);
|
1314 |
|
1315 |
|
1316 |
/*
|
1317 |
* Check that we have a true global namespace
|
1318 |
* command (enforced by Tcl_HideCommand() but let's double
|
1319 |
* check. (If it was not, we would not really know how to
|
1320 |
* handle it).
|
1321 |
*/
|
1322 |
if ( cmdPtr->nsPtr != iPtr->globalNsPtr ) {
|
1323 |
/*
|
1324 |
* This case is theoritically impossible,
|
1325 |
* we might rather panic() than 'nicely' erroring out ?
|
1326 |
*/
|
1327 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1328 |
"trying to expose a non global command name space command",
|
1329 |
(char *) NULL);
|
1330 |
return TCL_ERROR;
|
1331 |
}
|
1332 |
|
1333 |
/* This is the global table */
|
1334 |
nsPtr = cmdPtr->nsPtr;
|
1335 |
|
1336 |
/*
|
1337 |
* It is an error to overwrite an existing exposed command as a result
|
1338 |
* of exposing a previously hidden command.
|
1339 |
*/
|
1340 |
|
1341 |
hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, cmdName, &new);
|
1342 |
if (!new) {
|
1343 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1344 |
"exposed command \"", cmdName,
|
1345 |
"\" already exists", (char *) NULL);
|
1346 |
return TCL_ERROR;
|
1347 |
}
|
1348 |
|
1349 |
/*
|
1350 |
* Remove the hash entry for the command from the interpreter hidden
|
1351 |
* command table.
|
1352 |
*/
|
1353 |
|
1354 |
if (cmdPtr->hPtr != NULL) {
|
1355 |
Tcl_DeleteHashEntry(cmdPtr->hPtr);
|
1356 |
cmdPtr->hPtr = NULL;
|
1357 |
}
|
1358 |
|
1359 |
/*
|
1360 |
* Now link the hash table entry with the command structure.
|
1361 |
* This is like creating a new command, so deal with any shadowing
|
1362 |
* of commands in the global namespace.
|
1363 |
*/
|
1364 |
|
1365 |
cmdPtr->hPtr = hPtr;
|
1366 |
|
1367 |
Tcl_SetHashValue(hPtr, (ClientData) cmdPtr);
|
1368 |
|
1369 |
/*
|
1370 |
* Not needed as we are only in the global namespace
|
1371 |
* (but would be needed again if we supported namespace command hiding)
|
1372 |
*
|
1373 |
* TclResetShadowedCmdRefs(interp, cmdPtr);
|
1374 |
*/
|
1375 |
|
1376 |
|
1377 |
/*
|
1378 |
* If the command being exposed has a compile procedure, increment
|
1379 |
* interpreter's compileEpoch to invalidate its compiled code. This
|
1380 |
* makes sure that we don't later try to execute old code compiled
|
1381 |
* assuming the command is hidden. This field is checked in Tcl_EvalObj
|
1382 |
* and ObjInterpProc, and code whose compilation epoch doesn't match is
|
1383 |
* recompiled.
|
1384 |
*/
|
1385 |
|
1386 |
if (cmdPtr->compileProc != NULL) {
|
1387 |
iPtr->compileEpoch++;
|
1388 |
}
|
1389 |
return TCL_OK;
|
1390 |
}
|
1391 |
|
1392 |
/*
|
1393 |
*----------------------------------------------------------------------
|
1394 |
*
|
1395 |
* Tcl_CreateCommand --
|
1396 |
*
|
1397 |
* Define a new command in a command table.
|
1398 |
*
|
1399 |
* Results:
|
1400 |
* The return value is a token for the command, which can
|
1401 |
* be used in future calls to Tcl_GetCommandName.
|
1402 |
*
|
1403 |
* Side effects:
|
1404 |
* If a command named cmdName already exists for interp, it is deleted.
|
1405 |
* In the future, when cmdName is seen as the name of a command by
|
1406 |
* Tcl_Eval, proc will be called. To support the bytecode interpreter,
|
1407 |
* the command is created with a wrapper Tcl_ObjCmdProc
|
1408 |
* (TclInvokeStringCommand) that eventially calls proc. When the
|
1409 |
* command is deleted from the table, deleteProc will be called.
|
1410 |
* See the manual entry for details on the calling sequence.
|
1411 |
*
|
1412 |
*----------------------------------------------------------------------
|
1413 |
*/
|
1414 |
|
1415 |
Tcl_Command
|
1416 |
Tcl_CreateCommand(interp, cmdName, proc, clientData, deleteProc)
|
1417 |
Tcl_Interp *interp; /* Token for command interpreter returned by
|
1418 |
* a previous call to Tcl_CreateInterp. */
|
1419 |
char *cmdName; /* Name of command. If it contains namespace
|
1420 |
* qualifiers, the new command is put in the
|
1421 |
* specified namespace; otherwise it is put
|
1422 |
* in the global namespace. */
|
1423 |
Tcl_CmdProc *proc; /* Procedure to associate with cmdName. */
|
1424 |
ClientData clientData; /* Arbitrary value passed to string proc. */
|
1425 |
Tcl_CmdDeleteProc *deleteProc;
|
1426 |
/* If not NULL, gives a procedure to call
|
1427 |
* when this command is deleted. */
|
1428 |
{
|
1429 |
Interp *iPtr = (Interp *) interp;
|
1430 |
ImportRef *oldRefPtr = NULL;
|
1431 |
Namespace *nsPtr, *dummy1, *dummy2;
|
1432 |
Command *cmdPtr, *refCmdPtr;
|
1433 |
Tcl_HashEntry *hPtr;
|
1434 |
char *tail;
|
1435 |
int new;
|
1436 |
ImportedCmdData *dataPtr;
|
1437 |
|
1438 |
if (iPtr->flags & DELETED) {
|
1439 |
/*
|
1440 |
* The interpreter is being deleted. Don't create any new
|
1441 |
* commands; it's not safe to muck with the interpreter anymore.
|
1442 |
*/
|
1443 |
|
1444 |
return (Tcl_Command) NULL;
|
1445 |
}
|
1446 |
|
1447 |
/*
|
1448 |
* Determine where the command should reside. If its name contains
|
1449 |
* namespace qualifiers, we put it in the specified namespace;
|
1450 |
* otherwise, we always put it in the global namespace.
|
1451 |
*/
|
1452 |
|
1453 |
if (strstr(cmdName, "::") != NULL) {
|
1454 |
TclGetNamespaceForQualName(interp, cmdName, (Namespace *) NULL,
|
1455 |
CREATE_NS_IF_UNKNOWN, &nsPtr, &dummy1, &dummy2, &tail);
|
1456 |
if ((nsPtr == NULL) || (tail == NULL)) {
|
1457 |
return (Tcl_Command) NULL;
|
1458 |
}
|
1459 |
} else {
|
1460 |
nsPtr = iPtr->globalNsPtr;
|
1461 |
tail = cmdName;
|
1462 |
}
|
1463 |
|
1464 |
hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &new);
|
1465 |
if (!new) {
|
1466 |
/*
|
1467 |
* Command already exists. Delete the old one.
|
1468 |
* Be careful to preserve any existing import links so we can
|
1469 |
* restore them down below. That way, you can redefine a
|
1470 |
* command and its import status will remain intact.
|
1471 |
*/
|
1472 |
|
1473 |
cmdPtr = (Command *) Tcl_GetHashValue(hPtr);
|
1474 |
oldRefPtr = cmdPtr->importRefPtr;
|
1475 |
cmdPtr->importRefPtr = NULL;
|
1476 |
|
1477 |
Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr);
|
1478 |
hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &new);
|
1479 |
if (!new) {
|
1480 |
/*
|
1481 |
* If the deletion callback recreated the command, just throw
|
1482 |
* away the new command (if we try to delete it again, we
|
1483 |
* could get stuck in an infinite loop).
|
1484 |
*/
|
1485 |
|
1486 |
ckfree((char*) Tcl_GetHashValue(hPtr));
|
1487 |
}
|
1488 |
}
|
1489 |
cmdPtr = (Command *) ckalloc(sizeof(Command));
|
1490 |
Tcl_SetHashValue(hPtr, cmdPtr);
|
1491 |
cmdPtr->hPtr = hPtr;
|
1492 |
cmdPtr->nsPtr = nsPtr;
|
1493 |
cmdPtr->refCount = 1;
|
1494 |
cmdPtr->cmdEpoch = 0;
|
1495 |
cmdPtr->compileProc = (CompileProc *) NULL;
|
1496 |
cmdPtr->objProc = TclInvokeStringCommand;
|
1497 |
cmdPtr->objClientData = (ClientData) cmdPtr;
|
1498 |
cmdPtr->proc = proc;
|
1499 |
cmdPtr->clientData = clientData;
|
1500 |
cmdPtr->deleteProc = deleteProc;
|
1501 |
cmdPtr->deleteData = clientData;
|
1502 |
cmdPtr->deleted = 0;
|
1503 |
cmdPtr->importRefPtr = NULL;
|
1504 |
|
1505 |
/*
|
1506 |
* Plug in any existing import references found above. Be sure
|
1507 |
* to update all of these references to point to the new command.
|
1508 |
*/
|
1509 |
|
1510 |
if (oldRefPtr != NULL) {
|
1511 |
cmdPtr->importRefPtr = oldRefPtr;
|
1512 |
while (oldRefPtr != NULL) {
|
1513 |
refCmdPtr = oldRefPtr->importedCmdPtr;
|
1514 |
dataPtr = (ImportedCmdData*)refCmdPtr->objClientData;
|
1515 |
dataPtr->realCmdPtr = cmdPtr;
|
1516 |
oldRefPtr = oldRefPtr->nextPtr;
|
1517 |
}
|
1518 |
}
|
1519 |
|
1520 |
/*
|
1521 |
* We just created a command, so in its namespace and all of its parent
|
1522 |
* namespaces, it may shadow global commands with the same name. If any
|
1523 |
* shadowed commands are found, invalidate all cached command references
|
1524 |
* in the affected namespaces.
|
1525 |
*/
|
1526 |
|
1527 |
TclResetShadowedCmdRefs(interp, cmdPtr);
|
1528 |
return (Tcl_Command) cmdPtr;
|
1529 |
}
|
1530 |
|
1531 |
/*
|
1532 |
*----------------------------------------------------------------------
|
1533 |
*
|
1534 |
* Tcl_CreateObjCommand --
|
1535 |
*
|
1536 |
* Define a new object-based command in a command table.
|
1537 |
*
|
1538 |
* Results:
|
1539 |
* The return value is a token for the command, which can
|
1540 |
* be used in future calls to Tcl_GetCommandName.
|
1541 |
*
|
1542 |
* Side effects:
|
1543 |
* If no command named "cmdName" already exists for interp, one is
|
1544 |
* created. Otherwise, if a command does exist, then if the
|
1545 |
* object-based Tcl_ObjCmdProc is TclInvokeStringCommand, we assume
|
1546 |
* Tcl_CreateCommand was called previously for the same command and
|
1547 |
* just set its Tcl_ObjCmdProc to the argument "proc"; otherwise, we
|
1548 |
* delete the old command.
|
1549 |
*
|
1550 |
* In the future, during bytecode evaluation when "cmdName" is seen as
|
1551 |
* the name of a command by Tcl_EvalObj or Tcl_Eval, the object-based
|
1552 |
* Tcl_ObjCmdProc proc will be called. When the command is deleted from
|
1553 |
* the table, deleteProc will be called. See the manual entry for
|
1554 |
* details on the calling sequence.
|
1555 |
*
|
1556 |
*----------------------------------------------------------------------
|
1557 |
*/
|
1558 |
|
1559 |
Tcl_Command
|
1560 |
Tcl_CreateObjCommand(interp, cmdName, proc, clientData, deleteProc)
|
1561 |
Tcl_Interp *interp; /* Token for command interpreter (returned
|
1562 |
* by previous call to Tcl_CreateInterp). */
|
1563 |
char *cmdName; /* Name of command. If it contains namespace
|
1564 |
* qualifiers, the new command is put in the
|
1565 |
* specified namespace; otherwise it is put
|
1566 |
* in the global namespace. */
|
1567 |
Tcl_ObjCmdProc *proc; /* Object-based procedure to associate with
|
1568 |
* name. */
|
1569 |
ClientData clientData; /* Arbitrary value to pass to object
|
1570 |
* procedure. */
|
1571 |
Tcl_CmdDeleteProc *deleteProc;
|
1572 |
/* If not NULL, gives a procedure to call
|
1573 |
* when this command is deleted. */
|
1574 |
{
|
1575 |
Interp *iPtr = (Interp *) interp;
|
1576 |
ImportRef *oldRefPtr = NULL;
|
1577 |
Namespace *nsPtr, *dummy1, *dummy2;
|
1578 |
Command *cmdPtr, *refCmdPtr;
|
1579 |
Tcl_HashEntry *hPtr;
|
1580 |
char *tail;
|
1581 |
int new;
|
1582 |
ImportedCmdData *dataPtr;
|
1583 |
|
1584 |
if (iPtr->flags & DELETED) {
|
1585 |
/*
|
1586 |
* The interpreter is being deleted. Don't create any new
|
1587 |
* commands; it's not safe to muck with the interpreter anymore.
|
1588 |
*/
|
1589 |
|
1590 |
return (Tcl_Command) NULL;
|
1591 |
}
|
1592 |
|
1593 |
/*
|
1594 |
* Determine where the command should reside. If its name contains
|
1595 |
* namespace qualifiers, we put it in the specified namespace;
|
1596 |
* otherwise, we always put it in the global namespace.
|
1597 |
*/
|
1598 |
|
1599 |
if (strstr(cmdName, "::") != NULL) {
|
1600 |
TclGetNamespaceForQualName(interp, cmdName, (Namespace *) NULL,
|
1601 |
CREATE_NS_IF_UNKNOWN, &nsPtr, &dummy1, &dummy2, &tail);
|
1602 |
if ((nsPtr == NULL) || (tail == NULL)) {
|
1603 |
return (Tcl_Command) NULL;
|
1604 |
}
|
1605 |
} else {
|
1606 |
nsPtr = iPtr->globalNsPtr;
|
1607 |
tail = cmdName;
|
1608 |
}
|
1609 |
|
1610 |
hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &new);
|
1611 |
if (!new) {
|
1612 |
cmdPtr = (Command *) Tcl_GetHashValue(hPtr);
|
1613 |
|
1614 |
/*
|
1615 |
* Command already exists. If its object-based Tcl_ObjCmdProc is
|
1616 |
* TclInvokeStringCommand, we just set its Tcl_ObjCmdProc to the
|
1617 |
* argument "proc". Otherwise, we delete the old command.
|
1618 |
*/
|
1619 |
|
1620 |
if (cmdPtr->objProc == TclInvokeStringCommand) {
|
1621 |
cmdPtr->objProc = proc;
|
1622 |
cmdPtr->objClientData = clientData;
|
1623 |
cmdPtr->deleteProc = deleteProc;
|
1624 |
cmdPtr->deleteData = clientData;
|
1625 |
return (Tcl_Command) cmdPtr;
|
1626 |
}
|
1627 |
|
1628 |
/*
|
1629 |
* Otherwise, we delete the old command. Be careful to preserve
|
1630 |
* any existing import links so we can restore them down below.
|
1631 |
* That way, you can redefine a command and its import status
|
1632 |
* will remain intact.
|
1633 |
*/
|
1634 |
|
1635 |
oldRefPtr = cmdPtr->importRefPtr;
|
1636 |
cmdPtr->importRefPtr = NULL;
|
1637 |
|
1638 |
Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr);
|
1639 |
hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &new);
|
1640 |
if (!new) {
|
1641 |
/*
|
1642 |
* If the deletion callback recreated the command, just throw
|
1643 |
* away the new command (if we try to delete it again, we
|
1644 |
* could get stuck in an infinite loop).
|
1645 |
*/
|
1646 |
|
1647 |
ckfree((char *) Tcl_GetHashValue(hPtr));
|
1648 |
}
|
1649 |
}
|
1650 |
cmdPtr = (Command *) ckalloc(sizeof(Command));
|
1651 |
Tcl_SetHashValue(hPtr, cmdPtr);
|
1652 |
cmdPtr->hPtr = hPtr;
|
1653 |
cmdPtr->nsPtr = nsPtr;
|
1654 |
cmdPtr->refCount = 1;
|
1655 |
cmdPtr->cmdEpoch = 0;
|
1656 |
cmdPtr->compileProc = (CompileProc *) NULL;
|
1657 |
cmdPtr->objProc = proc;
|
1658 |
cmdPtr->objClientData = clientData;
|
1659 |
cmdPtr->proc = TclInvokeObjectCommand;
|
1660 |
cmdPtr->clientData = (ClientData) cmdPtr;
|
1661 |
cmdPtr->deleteProc = deleteProc;
|
1662 |
cmdPtr->deleteData = clientData;
|
1663 |
cmdPtr->deleted = 0;
|
1664 |
cmdPtr->importRefPtr = NULL;
|
1665 |
|
1666 |
/*
|
1667 |
* Plug in any existing import references found above. Be sure
|
1668 |
* to update all of these references to point to the new command.
|
1669 |
*/
|
1670 |
|
1671 |
if (oldRefPtr != NULL) {
|
1672 |
cmdPtr->importRefPtr = oldRefPtr;
|
1673 |
while (oldRefPtr != NULL) {
|
1674 |
refCmdPtr = oldRefPtr->importedCmdPtr;
|
1675 |
dataPtr = (ImportedCmdData*)refCmdPtr->objClientData;
|
1676 |
dataPtr->realCmdPtr = cmdPtr;
|
1677 |
oldRefPtr = oldRefPtr->nextPtr;
|
1678 |
}
|
1679 |
}
|
1680 |
|
1681 |
/*
|
1682 |
* We just created a command, so in its namespace and all of its parent
|
1683 |
* namespaces, it may shadow global commands with the same name. If any
|
1684 |
* shadowed commands are found, invalidate all cached command references
|
1685 |
* in the affected namespaces.
|
1686 |
*/
|
1687 |
|
1688 |
TclResetShadowedCmdRefs(interp, cmdPtr);
|
1689 |
return (Tcl_Command) cmdPtr;
|
1690 |
}
|
1691 |
|
1692 |
/*
|
1693 |
*----------------------------------------------------------------------
|
1694 |
*
|
1695 |
* TclInvokeStringCommand --
|
1696 |
*
|
1697 |
* "Wrapper" Tcl_ObjCmdProc used to call an existing string-based
|
1698 |
* Tcl_CmdProc if no object-based procedure exists for a command. A
|
1699 |
* pointer to this procedure is stored as the Tcl_ObjCmdProc in a
|
1700 |
* Command structure. It simply turns around and calls the string
|
1701 |
* Tcl_CmdProc in the Command structure.
|
1702 |
*
|
1703 |
* Results:
|
1704 |
* A standard Tcl object result value.
|
1705 |
*
|
1706 |
* Side effects:
|
1707 |
* Besides those side effects of the called Tcl_CmdProc,
|
1708 |
* TclInvokeStringCommand allocates and frees storage.
|
1709 |
*
|
1710 |
*----------------------------------------------------------------------
|
1711 |
*/
|
1712 |
|
1713 |
int
|
1714 |
TclInvokeStringCommand(clientData, interp, objc, objv)
|
1715 |
ClientData clientData; /* Points to command's Command structure. */
|
1716 |
Tcl_Interp *interp; /* Current interpreter. */
|
1717 |
register int objc; /* Number of arguments. */
|
1718 |
Tcl_Obj *CONST objv[]; /* Argument objects. */
|
1719 |
{
|
1720 |
register Command *cmdPtr = (Command *) clientData;
|
1721 |
register int i;
|
1722 |
int result;
|
1723 |
|
1724 |
/*
|
1725 |
* This procedure generates an argv array for the string arguments. It
|
1726 |
* starts out with stack-allocated space but uses dynamically-allocated
|
1727 |
* storage if needed.
|
1728 |
*/
|
1729 |
|
1730 |
#define NUM_ARGS 20
|
1731 |
char *(argStorage[NUM_ARGS]);
|
1732 |
char **argv = argStorage;
|
1733 |
|
1734 |
/*
|
1735 |
* Create the string argument array "argv". Make sure argv is large
|
1736 |
* enough to hold the objc arguments plus 1 extra for the zero
|
1737 |
* end-of-argv word.
|
1738 |
*/
|
1739 |
|
1740 |
if ((objc + 1) > NUM_ARGS) {
|
1741 |
argv = (char **) ckalloc((unsigned)(objc + 1) * sizeof(char *));
|
1742 |
}
|
1743 |
|
1744 |
for (i = 0; i < objc; i++) {
|
1745 |
argv[i] = Tcl_GetString(objv[i]);
|
1746 |
}
|
1747 |
argv[objc] = 0;
|
1748 |
|
1749 |
/*
|
1750 |
* Invoke the command's string-based Tcl_CmdProc.
|
1751 |
*/
|
1752 |
|
1753 |
result = (*cmdPtr->proc)(cmdPtr->clientData, interp, objc, argv);
|
1754 |
|
1755 |
/*
|
1756 |
* Free the argv array if malloc'ed storage was used.
|
1757 |
*/
|
1758 |
|
1759 |
if (argv != argStorage) {
|
1760 |
ckfree((char *) argv);
|
1761 |
}
|
1762 |
return result;
|
1763 |
#undef NUM_ARGS
|
1764 |
}
|
1765 |
|
1766 |
/*
|
1767 |
*----------------------------------------------------------------------
|
1768 |
*
|
1769 |
* TclInvokeObjectCommand --
|
1770 |
*
|
1771 |
* "Wrapper" Tcl_CmdProc used to call an existing object-based
|
1772 |
* Tcl_ObjCmdProc if no string-based procedure exists for a command.
|
1773 |
* A pointer to this procedure is stored as the Tcl_CmdProc in a
|
1774 |
* Command structure. It simply turns around and calls the object
|
1775 |
* Tcl_ObjCmdProc in the Command structure.
|
1776 |
*
|
1777 |
* Results:
|
1778 |
* A standard Tcl string result value.
|
1779 |
*
|
1780 |
* Side effects:
|
1781 |
* Besides those side effects of the called Tcl_CmdProc,
|
1782 |
* TclInvokeStringCommand allocates and frees storage.
|
1783 |
*
|
1784 |
*----------------------------------------------------------------------
|
1785 |
*/
|
1786 |
|
1787 |
int
|
1788 |
TclInvokeObjectCommand(clientData, interp, argc, argv)
|
1789 |
ClientData clientData; /* Points to command's Command structure. */
|
1790 |
Tcl_Interp *interp; /* Current interpreter. */
|
1791 |
int argc; /* Number of arguments. */
|
1792 |
register char **argv; /* Argument strings. */
|
1793 |
{
|
1794 |
Command *cmdPtr = (Command *) clientData;
|
1795 |
register Tcl_Obj *objPtr;
|
1796 |
register int i;
|
1797 |
int length, result;
|
1798 |
|
1799 |
/*
|
1800 |
* This procedure generates an objv array for object arguments that hold
|
1801 |
* the argv strings. It starts out with stack-allocated space but uses
|
1802 |
* dynamically-allocated storage if needed.
|
1803 |
*/
|
1804 |
|
1805 |
#define NUM_ARGS 20
|
1806 |
Tcl_Obj *(argStorage[NUM_ARGS]);
|
1807 |
register Tcl_Obj **objv = argStorage;
|
1808 |
|
1809 |
/*
|
1810 |
* Create the object argument array "objv". Make sure objv is large
|
1811 |
* enough to hold the objc arguments plus 1 extra for the zero
|
1812 |
* end-of-objv word.
|
1813 |
*/
|
1814 |
|
1815 |
if ((argc + 1) > NUM_ARGS) {
|
1816 |
objv = (Tcl_Obj **)
|
1817 |
ckalloc((unsigned)(argc + 1) * sizeof(Tcl_Obj *));
|
1818 |
}
|
1819 |
|
1820 |
for (i = 0; i < argc; i++) {
|
1821 |
length = strlen(argv[i]);
|
1822 |
TclNewObj(objPtr);
|
1823 |
TclInitStringRep(objPtr, argv[i], length);
|
1824 |
Tcl_IncrRefCount(objPtr);
|
1825 |
objv[i] = objPtr;
|
1826 |
}
|
1827 |
objv[argc] = 0;
|
1828 |
|
1829 |
/*
|
1830 |
* Invoke the command's object-based Tcl_ObjCmdProc.
|
1831 |
*/
|
1832 |
|
1833 |
result = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, argc, objv);
|
1834 |
|
1835 |
/*
|
1836 |
* Move the interpreter's object result to the string result,
|
1837 |
* then reset the object result.
|
1838 |
*/
|
1839 |
|
1840 |
Tcl_SetResult(interp, TclGetString(Tcl_GetObjResult(interp)),
|
1841 |
TCL_VOLATILE);
|
1842 |
|
1843 |
/*
|
1844 |
* Decrement the ref counts for the argument objects created above,
|
1845 |
* then free the objv array if malloc'ed storage was used.
|
1846 |
*/
|
1847 |
|
1848 |
for (i = 0; i < argc; i++) {
|
1849 |
objPtr = objv[i];
|
1850 |
Tcl_DecrRefCount(objPtr);
|
1851 |
}
|
1852 |
if (objv != argStorage) {
|
1853 |
ckfree((char *) objv);
|
1854 |
}
|
1855 |
return result;
|
1856 |
#undef NUM_ARGS
|
1857 |
}
|
1858 |
|
1859 |
/*
|
1860 |
*----------------------------------------------------------------------
|
1861 |
*
|
1862 |
* TclRenameCommand --
|
1863 |
*
|
1864 |
* Called to give an existing Tcl command a different name. Both the
|
1865 |
* old command name and the new command name can have "::" namespace
|
1866 |
* qualifiers. If the new command has a different namespace context,
|
1867 |
* the command will be moved to that namespace and will execute in
|
1868 |
* the context of that new namespace.
|
1869 |
*
|
1870 |
* If the new command name is NULL or the null string, the command is
|
1871 |
* deleted.
|
1872 |
*
|
1873 |
* Results:
|
1874 |
* Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong.
|
1875 |
*
|
1876 |
* Side effects:
|
1877 |
* If anything goes wrong, an error message is returned in the
|
1878 |
* interpreter's result object.
|
1879 |
*
|
1880 |
*----------------------------------------------------------------------
|
1881 |
*/
|
1882 |
|
1883 |
int
|
1884 |
TclRenameCommand(interp, oldName, newName)
|
1885 |
Tcl_Interp *interp; /* Current interpreter. */
|
1886 |
char *oldName; /* Existing command name. */
|
1887 |
char *newName; /* New command name. */
|
1888 |
{
|
1889 |
Interp *iPtr = (Interp *) interp;
|
1890 |
char *newTail;
|
1891 |
Namespace *cmdNsPtr, *newNsPtr, *dummy1, *dummy2;
|
1892 |
Tcl_Command cmd;
|
1893 |
Command *cmdPtr;
|
1894 |
Tcl_HashEntry *hPtr, *oldHPtr;
|
1895 |
int new, result;
|
1896 |
|
1897 |
/*
|
1898 |
* Find the existing command. An error is returned if cmdName can't
|
1899 |
* be found.
|
1900 |
*/
|
1901 |
|
1902 |
cmd = Tcl_FindCommand(interp, oldName, (Tcl_Namespace *) NULL,
|
1903 |
/*flags*/ 0);
|
1904 |
cmdPtr = (Command *) cmd;
|
1905 |
if (cmdPtr == NULL) {
|
1906 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "can't ",
|
1907 |
((newName == NULL)||(*newName == '\0'))? "delete":"rename",
|
1908 |
" \"", oldName, "\": command doesn't exist", (char *) NULL);
|
1909 |
return TCL_ERROR;
|
1910 |
}
|
1911 |
cmdNsPtr = cmdPtr->nsPtr;
|
1912 |
|
1913 |
/*
|
1914 |
* If the new command name is NULL or empty, delete the command. Do this
|
1915 |
* with Tcl_DeleteCommandFromToken, since we already have the command.
|
1916 |
*/
|
1917 |
|
1918 |
if ((newName == NULL) || (*newName == '\0')) {
|
1919 |
Tcl_DeleteCommandFromToken(interp, cmd);
|
1920 |
return TCL_OK;
|
1921 |
}
|
1922 |
|
1923 |
/*
|
1924 |
* Make sure that the destination command does not already exist.
|
1925 |
* The rename operation is like creating a command, so we should
|
1926 |
* automatically create the containing namespaces just like
|
1927 |
* Tcl_CreateCommand would.
|
1928 |
*/
|
1929 |
|
1930 |
TclGetNamespaceForQualName(interp, newName, (Namespace *) NULL,
|
1931 |
CREATE_NS_IF_UNKNOWN, &newNsPtr, &dummy1, &dummy2, &newTail);
|
1932 |
|
1933 |
if ((newNsPtr == NULL) || (newTail == NULL)) {
|
1934 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1935 |
"can't rename to \"", newName, "\": bad command name",
|
1936 |
(char *) NULL);
|
1937 |
return TCL_ERROR;
|
1938 |
}
|
1939 |
if (Tcl_FindHashEntry(&newNsPtr->cmdTable, newTail) != NULL) {
|
1940 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1941 |
"can't rename to \"", newName,
|
1942 |
"\": command already exists", (char *) NULL);
|
1943 |
return TCL_ERROR;
|
1944 |
}
|
1945 |
|
1946 |
|
1947 |
/*
|
1948 |
* Warning: any changes done in the code here are likely
|
1949 |
* to be needed in Tcl_HideCommand() code too.
|
1950 |
* (until the common parts are extracted out) --dl
|
1951 |
*/
|
1952 |
|
1953 |
/*
|
1954 |
* Put the command in the new namespace so we can check for an alias
|
1955 |
* loop. Since we are adding a new command to a namespace, we must
|
1956 |
* handle any shadowing of the global commands that this might create.
|
1957 |
*/
|
1958 |
|
1959 |
oldHPtr = cmdPtr->hPtr;
|
1960 |
hPtr = Tcl_CreateHashEntry(&newNsPtr->cmdTable, newTail, &new);
|
1961 |
Tcl_SetHashValue(hPtr, (ClientData) cmdPtr);
|
1962 |
cmdPtr->hPtr = hPtr;
|
1963 |
cmdPtr->nsPtr = newNsPtr;
|
1964 |
TclResetShadowedCmdRefs(interp, cmdPtr);
|
1965 |
|
1966 |
/*
|
1967 |
* Now check for an alias loop. If we detect one, put everything back
|
1968 |
* the way it was and report the error.
|
1969 |
*/
|
1970 |
|
1971 |
result = TclPreventAliasLoop(interp, interp, (Tcl_Command) cmdPtr);
|
1972 |
if (result != TCL_OK) {
|
1973 |
Tcl_DeleteHashEntry(cmdPtr->hPtr);
|
1974 |
cmdPtr->hPtr = oldHPtr;
|
1975 |
cmdPtr->nsPtr = cmdNsPtr;
|
1976 |
return result;
|
1977 |
}
|
1978 |
|
1979 |
/*
|
1980 |
* The new command name is okay, so remove the command from its
|
1981 |
* current namespace. This is like deleting the command, so bump
|
1982 |
* the cmdEpoch to invalidate any cached references to the command.
|
1983 |
*/
|
1984 |
|
1985 |
Tcl_DeleteHashEntry(oldHPtr);
|
1986 |
cmdPtr->cmdEpoch++;
|
1987 |
|
1988 |
/*
|
1989 |
* If the command being renamed has a compile procedure, increment the
|
1990 |
* interpreter's compileEpoch to invalidate its compiled code. This
|
1991 |
* makes sure that we don't later try to execute old code compiled for
|
1992 |
* the now-renamed command.
|
1993 |
*/
|
1994 |
|
1995 |
if (cmdPtr->compileProc != NULL) {
|
1996 |
iPtr->compileEpoch++;
|
1997 |
}
|
1998 |
|
1999 |
return TCL_OK;
|
2000 |
}
|
2001 |
|
2002 |
/*
|
2003 |
*----------------------------------------------------------------------
|
2004 |
*
|
2005 |
* Tcl_SetCommandInfo --
|
2006 |
*
|
2007 |
* Modifies various information about a Tcl command. Note that
|
2008 |
* this procedure will not change a command's namespace; use
|
2009 |
* Tcl_RenameCommand to do that. Also, the isNativeObjectProc
|
2010 |
* member of *infoPtr is ignored.
|
2011 |
*
|
2012 |
* Results:
|
2013 |
* If cmdName exists in interp, then the information at *infoPtr
|
2014 |
* is stored with the command in place of the current information
|
2015 |
* and 1 is returned. If the command doesn't exist then 0 is
|
2016 |
* returned.
|
2017 |
*
|
2018 |
* Side effects:
|
2019 |
* None.
|
2020 |
*
|
2021 |
*----------------------------------------------------------------------
|
2022 |
*/
|
2023 |
|
2024 |
int
|
2025 |
Tcl_SetCommandInfo(interp, cmdName, infoPtr)
|
2026 |
Tcl_Interp *interp; /* Interpreter in which to look
|
2027 |
* for command. */
|
2028 |
char *cmdName; /* Name of desired command. */
|
2029 |
Tcl_CmdInfo *infoPtr; /* Where to find information
|
2030 |
* to store in the command. */
|
2031 |
{
|
2032 |
Tcl_Command cmd;
|
2033 |
Command *cmdPtr;
|
2034 |
|
2035 |
cmd = Tcl_FindCommand(interp, cmdName, (Tcl_Namespace *) NULL,
|
2036 |
/*flags*/ 0);
|
2037 |
if (cmd == (Tcl_Command) NULL) {
|
2038 |
return 0;
|
2039 |
}
|
2040 |
|
2041 |
/*
|
2042 |
* The isNativeObjectProc and nsPtr members of *infoPtr are ignored.
|
2043 |
*/
|
2044 |
|
2045 |
cmdPtr = (Command *) cmd;
|
2046 |
cmdPtr->proc = infoPtr->proc;
|
2047 |
cmdPtr->clientData = infoPtr->clientData;
|
2048 |
if (infoPtr->objProc == (Tcl_ObjCmdProc *) NULL) {
|
2049 |
cmdPtr->objProc = TclInvokeStringCommand;
|
2050 |
cmdPtr->objClientData = (ClientData) cmdPtr;
|
2051 |
} else {
|
2052 |
cmdPtr->objProc = infoPtr->objProc;
|
2053 |
cmdPtr->objClientData = infoPtr->objClientData;
|
2054 |
}
|
2055 |
cmdPtr->deleteProc = infoPtr->deleteProc;
|
2056 |
cmdPtr->deleteData = infoPtr->deleteData;
|
2057 |
return 1;
|
2058 |
}
|
2059 |
|
2060 |
/*
|
2061 |
*----------------------------------------------------------------------
|
2062 |
*
|
2063 |
* Tcl_GetCommandInfo --
|
2064 |
*
|
2065 |
* Returns various information about a Tcl command.
|
2066 |
*
|
2067 |
* Results:
|
2068 |
* If cmdName exists in interp, then *infoPtr is modified to
|
2069 |
* hold information about cmdName and 1 is returned. If the
|
2070 |
* command doesn't exist then 0 is returned and *infoPtr isn't
|
2071 |
* modified.
|
2072 |
*
|
2073 |
* Side effects:
|
2074 |
* None.
|
2075 |
*
|
2076 |
*----------------------------------------------------------------------
|
2077 |
*/
|
2078 |
|
2079 |
int
|
2080 |
Tcl_GetCommandInfo(interp, cmdName, infoPtr)
|
2081 |
Tcl_Interp *interp; /* Interpreter in which to look
|
2082 |
* for command. */
|
2083 |
char *cmdName; /* Name of desired command. */
|
2084 |
Tcl_CmdInfo *infoPtr; /* Where to store information about
|
2085 |
* command. */
|
2086 |
{
|
2087 |
Tcl_Command cmd;
|
2088 |
Command *cmdPtr;
|
2089 |
|
2090 |
cmd = Tcl_FindCommand(interp, cmdName, (Tcl_Namespace *) NULL,
|
2091 |
/*flags*/ 0);
|
2092 |
if (cmd == (Tcl_Command) NULL) {
|
2093 |
return 0;
|
2094 |
}
|
2095 |
|
2096 |
/*
|
2097 |
* Set isNativeObjectProc 1 if objProc was registered by a call to
|
2098 |
* Tcl_CreateObjCommand. Otherwise set it to 0.
|
2099 |
*/
|
2100 |
|
2101 |
cmdPtr = (Command *) cmd;
|
2102 |
infoPtr->isNativeObjectProc =
|
2103 |
(cmdPtr->objProc != TclInvokeStringCommand);
|
2104 |
infoPtr->objProc = cmdPtr->objProc;
|
2105 |
infoPtr->objClientData = cmdPtr->objClientData;
|
2106 |
infoPtr->proc = cmdPtr->proc;
|
2107 |
infoPtr->clientData = cmdPtr->clientData;
|
2108 |
infoPtr->deleteProc = cmdPtr->deleteProc;
|
2109 |
infoPtr->deleteData = cmdPtr->deleteData;
|
2110 |
infoPtr->namespacePtr = (Tcl_Namespace *) cmdPtr->nsPtr;
|
2111 |
return 1;
|
2112 |
}
|
2113 |
|
2114 |
/*
|
2115 |
*----------------------------------------------------------------------
|
2116 |
*
|
2117 |
* Tcl_GetCommandName --
|
2118 |
*
|
2119 |
* Given a token returned by Tcl_CreateCommand, this procedure
|
2120 |
* returns the current name of the command (which may have changed
|
2121 |
* due to renaming).
|
2122 |
*
|
2123 |
* Results:
|
2124 |
* The return value is the name of the given command.
|
2125 |
*
|
2126 |
* Side effects:
|
2127 |
* None.
|
2128 |
*
|
2129 |
*----------------------------------------------------------------------
|
2130 |
*/
|
2131 |
|
2132 |
char *
|
2133 |
Tcl_GetCommandName(interp, command)
|
2134 |
Tcl_Interp *interp; /* Interpreter containing the command. */
|
2135 |
Tcl_Command command; /* Token for command returned by a previous
|
2136 |
* call to Tcl_CreateCommand. The command
|
2137 |
* must not have been deleted. */
|
2138 |
{
|
2139 |
Command *cmdPtr = (Command *) command;
|
2140 |
|
2141 |
if ((cmdPtr == NULL) || (cmdPtr->hPtr == NULL)) {
|
2142 |
|
2143 |
/*
|
2144 |
* This should only happen if command was "created" after the
|
2145 |
* interpreter began to be deleted, so there isn't really any
|
2146 |
* command. Just return an empty string.
|
2147 |
*/
|
2148 |
|
2149 |
return "";
|
2150 |
}
|
2151 |
return Tcl_GetHashKey(cmdPtr->hPtr->tablePtr, cmdPtr->hPtr);
|
2152 |
}
|
2153 |
|
2154 |
/*
|
2155 |
*----------------------------------------------------------------------
|
2156 |
*
|
2157 |
* Tcl_GetCommandFullName --
|
2158 |
*
|
2159 |
* Given a token returned by, e.g., Tcl_CreateCommand or
|
2160 |
* Tcl_FindCommand, this procedure appends to an object the command's
|
2161 |
* full name, qualified by a sequence of parent namespace names. The
|
2162 |
* command's fully-qualified name may have changed due to renaming.
|
2163 |
*
|
2164 |
* Results:
|
2165 |
* None.
|
2166 |
*
|
2167 |
* Side effects:
|
2168 |
* The command's fully-qualified name is appended to the string
|
2169 |
* representation of objPtr.
|
2170 |
*
|
2171 |
*----------------------------------------------------------------------
|
2172 |
*/
|
2173 |
|
2174 |
void
|
2175 |
Tcl_GetCommandFullName(interp, command, objPtr)
|
2176 |
Tcl_Interp *interp; /* Interpreter containing the command. */
|
2177 |
Tcl_Command command; /* Token for command returned by a previous
|
2178 |
* call to Tcl_CreateCommand. The command
|
2179 |
* must not have been deleted. */
|
2180 |
Tcl_Obj *objPtr; /* Points to the object onto which the
|
2181 |
* command's full name is appended. */
|
2182 |
|
2183 |
{
|
2184 |
Interp *iPtr = (Interp *) interp;
|
2185 |
register Command *cmdPtr = (Command *) command;
|
2186 |
char *name;
|
2187 |
|
2188 |
/*
|
2189 |
* Add the full name of the containing namespace, followed by the "::"
|
2190 |
* separator, and the command name.
|
2191 |
*/
|
2192 |
|
2193 |
if (cmdPtr != NULL) {
|
2194 |
if (cmdPtr->nsPtr != NULL) {
|
2195 |
Tcl_AppendToObj(objPtr, cmdPtr->nsPtr->fullName, -1);
|
2196 |
if (cmdPtr->nsPtr != iPtr->globalNsPtr) {
|
2197 |
Tcl_AppendToObj(objPtr, "::", 2);
|
2198 |
}
|
2199 |
}
|
2200 |
if (cmdPtr->hPtr != NULL) {
|
2201 |
name = Tcl_GetHashKey(cmdPtr->hPtr->tablePtr, cmdPtr->hPtr);
|
2202 |
Tcl_AppendToObj(objPtr, name, -1);
|
2203 |
}
|
2204 |
}
|
2205 |
}
|
2206 |
|
2207 |
/*
|
2208 |
*----------------------------------------------------------------------
|
2209 |
*
|
2210 |
* Tcl_DeleteCommand --
|
2211 |
*
|
2212 |
* Remove the given command from the given interpreter.
|
2213 |
*
|
2214 |
* Results:
|
2215 |
* 0 is returned if the command was deleted successfully.
|
2216 |
* -1 is returned if there didn't exist a command by that name.
|
2217 |
*
|
2218 |
* Side effects:
|
2219 |
* cmdName will no longer be recognized as a valid command for
|
2220 |
* interp.
|
2221 |
*
|
2222 |
*----------------------------------------------------------------------
|
2223 |
*/
|
2224 |
|
2225 |
int
|
2226 |
Tcl_DeleteCommand(interp, cmdName)
|
2227 |
Tcl_Interp *interp; /* Token for command interpreter (returned
|
2228 |
* by a previous Tcl_CreateInterp call). */
|
2229 |
char *cmdName; /* Name of command to remove. */
|
2230 |
{
|
2231 |
Tcl_Command cmd;
|
2232 |
|
2233 |
/*
|
2234 |
* Find the desired command and delete it.
|
2235 |
*/
|
2236 |
|
2237 |
cmd = Tcl_FindCommand(interp, cmdName, (Tcl_Namespace *) NULL,
|
2238 |
/*flags*/ 0);
|
2239 |
if (cmd == (Tcl_Command) NULL) {
|
2240 |
return -1;
|
2241 |
}
|
2242 |
return Tcl_DeleteCommandFromToken(interp, cmd);
|
2243 |
}
|
2244 |
|
2245 |
/*
|
2246 |
*----------------------------------------------------------------------
|
2247 |
*
|
2248 |
* Tcl_DeleteCommandFromToken --
|
2249 |
*
|
2250 |
* Removes the given command from the given interpreter. This procedure
|
2251 |
* resembles Tcl_DeleteCommand, but takes a Tcl_Command token instead
|
2252 |
* of a command name for efficiency.
|
2253 |
*
|
2254 |
* Results:
|
2255 |
* 0 is returned if the command was deleted successfully.
|
2256 |
* -1 is returned if there didn't exist a command by that name.
|
2257 |
*
|
2258 |
* Side effects:
|
2259 |
* The command specified by "cmd" will no longer be recognized as a
|
2260 |
* valid command for "interp".
|
2261 |
*
|
2262 |
*----------------------------------------------------------------------
|
2263 |
*/
|
2264 |
|
2265 |
int
|
2266 |
Tcl_DeleteCommandFromToken(interp, cmd)
|
2267 |
Tcl_Interp *interp; /* Token for command interpreter returned by
|
2268 |
* a previous call to Tcl_CreateInterp. */
|
2269 |
Tcl_Command cmd; /* Token for command to delete. */
|
2270 |
{
|
2271 |
Interp *iPtr = (Interp *) interp;
|
2272 |
Command *cmdPtr = (Command *) cmd;
|
2273 |
ImportRef *refPtr, *nextRefPtr;
|
2274 |
Tcl_Command importCmd;
|
2275 |
|
2276 |
/*
|
2277 |
* The code here is tricky. We can't delete the hash table entry
|
2278 |
* before invoking the deletion callback because there are cases
|
2279 |
* where the deletion callback needs to invoke the command (e.g.
|
2280 |
* object systems such as OTcl). However, this means that the
|
2281 |
* callback could try to delete or rename the command. The deleted
|
2282 |
* flag allows us to detect these cases and skip nested deletes.
|
2283 |
*/
|
2284 |
|
2285 |
if (cmdPtr->deleted) {
|
2286 |
/*
|
2287 |
* Another deletion is already in progress. Remove the hash
|
2288 |
* table entry now, but don't invoke a callback or free the
|
2289 |
* command structure.
|
2290 |
*/
|
2291 |
|
2292 |
Tcl_DeleteHashEntry(cmdPtr->hPtr);
|
2293 |
cmdPtr->hPtr = NULL;
|
2294 |
return 0;
|
2295 |
}
|
2296 |
|
2297 |
/*
|
2298 |
* If the command being deleted has a compile procedure, increment the
|
2299 |
* interpreter's compileEpoch to invalidate its compiled code. This
|
2300 |
* makes sure that we don't later try to execute old code compiled with
|
2301 |
* command-specific (i.e., inline) bytecodes for the now-deleted
|
2302 |
* command. This field is checked in Tcl_EvalObj and ObjInterpProc, and
|
2303 |
* code whose compilation epoch doesn't match is recompiled.
|
2304 |
*/
|
2305 |
|
2306 |
if (cmdPtr->compileProc != NULL) {
|
2307 |
iPtr->compileEpoch++;
|
2308 |
}
|
2309 |
|
2310 |
cmdPtr->deleted = 1;
|
2311 |
if (cmdPtr->deleteProc != NULL) {
|
2312 |
/*
|
2313 |
* Delete the command's client data. If this was an imported command
|
2314 |
* created when a command was imported into a namespace, this client
|
2315 |
* data will be a pointer to a ImportedCmdData structure describing
|
2316 |
* the "real" command that this imported command refers to.
|
2317 |
*/
|
2318 |
|
2319 |
/*
|
2320 |
* If you are getting a crash during the call to deleteProc and
|
2321 |
* cmdPtr->deleteProc is a pointer to the function free(), the
|
2322 |
* most likely cause is that your extension allocated memory
|
2323 |
* for the clientData argument to Tcl_CreateObjCommand() with
|
2324 |
* the ckalloc() macro and you are now trying to deallocate
|
2325 |
* this memory with free() instead of ckfree(). You should
|
2326 |
* pass a pointer to your own method that calls ckfree().
|
2327 |
*/
|
2328 |
|
2329 |
(*cmdPtr->deleteProc)(cmdPtr->deleteData);
|
2330 |
}
|
2331 |
|
2332 |
/*
|
2333 |
* Bump the command epoch counter. This will invalidate all cached
|
2334 |
* references that point to this command.
|
2335 |
*/
|
2336 |
|
2337 |
cmdPtr->cmdEpoch++;
|
2338 |
|
2339 |
/*
|
2340 |
* If this command was imported into other namespaces, then imported
|
2341 |
* commands were created that refer back to this command. Delete these
|
2342 |
* imported commands now.
|
2343 |
*/
|
2344 |
|
2345 |
for (refPtr = cmdPtr->importRefPtr; refPtr != NULL;
|
2346 |
refPtr = nextRefPtr) {
|
2347 |
nextRefPtr = refPtr->nextPtr;
|
2348 |
importCmd = (Tcl_Command) refPtr->importedCmdPtr;
|
2349 |
Tcl_DeleteCommandFromToken(interp, importCmd);
|
2350 |
}
|
2351 |
|
2352 |
/*
|
2353 |
* Don't use hPtr to delete the hash entry here, because it's
|
2354 |
* possible that the deletion callback renamed the command.
|
2355 |
* Instead, use cmdPtr->hptr, and make sure that no-one else
|
2356 |
* has already deleted the hash entry.
|
2357 |
*/
|
2358 |
|
2359 |
if (cmdPtr->hPtr != NULL) {
|
2360 |
Tcl_DeleteHashEntry(cmdPtr->hPtr);
|
2361 |
}
|
2362 |
|
2363 |
/*
|
2364 |
* Mark the Command structure as no longer valid. This allows
|
2365 |
* TclExecuteByteCode to recognize when a Command has logically been
|
2366 |
* deleted and a pointer to this Command structure cached in a CmdName
|
2367 |
* object is invalid. TclExecuteByteCode will look up the command again
|
2368 |
* in the interpreter's command hashtable.
|
2369 |
*/
|
2370 |
|
2371 |
cmdPtr->objProc = NULL;
|
2372 |
|
2373 |
/*
|
2374 |
* Now free the Command structure, unless there is another reference to
|
2375 |
* it from a CmdName Tcl object in some ByteCode code sequence. In that
|
2376 |
* case, delay the cleanup until all references are either discarded
|
2377 |
* (when a ByteCode is freed) or replaced by a new reference (when a
|
2378 |
* cached CmdName Command reference is found to be invalid and
|
2379 |
* TclExecuteByteCode looks up the command in the command hashtable).
|
2380 |
*/
|
2381 |
|
2382 |
TclCleanupCommand(cmdPtr);
|
2383 |
return 0;
|
2384 |
}
|
2385 |
|
2386 |
/*
|
2387 |
*----------------------------------------------------------------------
|
2388 |
*
|
2389 |
* TclCleanupCommand --
|
2390 |
*
|
2391 |
* This procedure frees up a Command structure unless it is still
|
2392 |
* referenced from an interpreter's command hashtable or from a CmdName
|
2393 |
* Tcl object representing the name of a command in a ByteCode
|
2394 |
* instruction sequence.
|
2395 |
*
|
2396 |
* Results:
|
2397 |
* None.
|
2398 |
*
|
2399 |
* Side effects:
|
2400 |
* Memory gets freed unless a reference to the Command structure still
|
2401 |
* exists. In that case the cleanup is delayed until the command is
|
2402 |
* deleted or when the last ByteCode referring to it is freed.
|
2403 |
*
|
2404 |
*----------------------------------------------------------------------
|
2405 |
*/
|
2406 |
|
2407 |
void
|
2408 |
TclCleanupCommand(cmdPtr)
|
2409 |
register Command *cmdPtr; /* Points to the Command structure to
|
2410 |
* be freed. */
|
2411 |
{
|
2412 |
cmdPtr->refCount--;
|
2413 |
if (cmdPtr->refCount <= 0) {
|
2414 |
ckfree((char *) cmdPtr);
|
2415 |
}
|
2416 |
}
|
2417 |
|
2418 |
/*
|
2419 |
*----------------------------------------------------------------------
|
2420 |
*
|
2421 |
* Tcl_CreateMathFunc --
|
2422 |
*
|
2423 |
* Creates a new math function for expressions in a given
|
2424 |
* interpreter.
|
2425 |
*
|
2426 |
* Results:
|
2427 |
* None.
|
2428 |
*
|
2429 |
* Side effects:
|
2430 |
* The function defined by "name" is created or redefined. If the
|
2431 |
* function already exists then its definition is replaced; this
|
2432 |
* includes the builtin functions. Redefining a builtin function forces
|
2433 |
* all existing code to be invalidated since that code may be compiled
|
2434 |
* using an instruction specific to the replaced function. In addition,
|
2435 |
* redefioning a non-builtin function will force existing code to be
|
2436 |
* invalidated if the number of arguments has changed.
|
2437 |
*
|
2438 |
*----------------------------------------------------------------------
|
2439 |
*/
|
2440 |
|
2441 |
void
|
2442 |
Tcl_CreateMathFunc(interp, name, numArgs, argTypes, proc, clientData)
|
2443 |
Tcl_Interp *interp; /* Interpreter in which function is
|
2444 |
* to be available. */
|
2445 |
char *name; /* Name of function (e.g. "sin"). */
|
2446 |
int numArgs; /* Nnumber of arguments required by
|
2447 |
* function. */
|
2448 |
Tcl_ValueType *argTypes; /* Array of types acceptable for
|
2449 |
* each argument. */
|
2450 |
Tcl_MathProc *proc; /* Procedure that implements the
|
2451 |
* math function. */
|
2452 |
ClientData clientData; /* Additional value to pass to the
|
2453 |
* function. */
|
2454 |
{
|
2455 |
Interp *iPtr = (Interp *) interp;
|
2456 |
Tcl_HashEntry *hPtr;
|
2457 |
MathFunc *mathFuncPtr;
|
2458 |
int new, i;
|
2459 |
|
2460 |
hPtr = Tcl_CreateHashEntry(&iPtr->mathFuncTable, name, &new);
|
2461 |
if (new) {
|
2462 |
Tcl_SetHashValue(hPtr, ckalloc(sizeof(MathFunc)));
|
2463 |
}
|
2464 |
mathFuncPtr = (MathFunc *) Tcl_GetHashValue(hPtr);
|
2465 |
|
2466 |
if (!new) {
|
2467 |
if (mathFuncPtr->builtinFuncIndex >= 0) {
|
2468 |
/*
|
2469 |
* We are redefining a builtin math function. Invalidate the
|
2470 |
* interpreter's existing code by incrementing its
|
2471 |
* compileEpoch member. This field is checked in Tcl_EvalObj
|
2472 |
* and ObjInterpProc, and code whose compilation epoch doesn't
|
2473 |
* match is recompiled. Newly compiled code will no longer
|
2474 |
* treat the function as builtin.
|
2475 |
*/
|
2476 |
|
2477 |
iPtr->compileEpoch++;
|
2478 |
} else {
|
2479 |
/*
|
2480 |
* A non-builtin function is being redefined. We must invalidate
|
2481 |
* existing code if the number of arguments has changed. This
|
2482 |
* is because existing code was compiled assuming that number.
|
2483 |
*/
|
2484 |
|
2485 |
if (numArgs != mathFuncPtr->numArgs) {
|
2486 |
iPtr->compileEpoch++;
|
2487 |
}
|
2488 |
}
|
2489 |
}
|
2490 |
|
2491 |
mathFuncPtr->builtinFuncIndex = -1; /* can't be a builtin function */
|
2492 |
if (numArgs > MAX_MATH_ARGS) {
|
2493 |
numArgs = MAX_MATH_ARGS;
|
2494 |
}
|
2495 |
mathFuncPtr->numArgs = numArgs;
|
2496 |
for (i = 0; i < numArgs; i++) {
|
2497 |
mathFuncPtr->argTypes[i] = argTypes[i];
|
2498 |
}
|
2499 |
mathFuncPtr->proc = proc;
|
2500 |
mathFuncPtr->clientData = clientData;
|
2501 |
}
|
2502 |
|
2503 |
/*
|
2504 |
*----------------------------------------------------------------------
|
2505 |
*
|
2506 |
* Tcl_EvalObjEx --
|
2507 |
*
|
2508 |
* Execute Tcl commands stored in a Tcl object. These commands are
|
2509 |
* compiled into bytecodes if necessary, unless TCL_EVAL_DIRECT
|
2510 |
* is specified.
|
2511 |
*
|
2512 |
* Results:
|
2513 |
* The return value is one of the return codes defined in tcl.h
|
2514 |
* (such as TCL_OK), and the interpreter's result contains a value
|
2515 |
* to supplement the return code.
|
2516 |
*
|
2517 |
* Side effects:
|
2518 |
* The object is converted, if necessary, to a ByteCode object that
|
2519 |
* holds the bytecode instructions for the commands. Executing the
|
2520 |
* commands will almost certainly have side effects that depend
|
2521 |
* on those commands.
|
2522 |
*
|
2523 |
* Just as in Tcl_Eval, interp->termOffset is set to the offset of the
|
2524 |
* last character executed in the objPtr's string.
|
2525 |
*
|
2526 |
*----------------------------------------------------------------------
|
2527 |
*/
|
2528 |
|
2529 |
int
|
2530 |
Tcl_EvalObjEx(interp, objPtr, flags)
|
2531 |
Tcl_Interp *interp; /* Token for command interpreter
|
2532 |
* (returned by a previous call to
|
2533 |
* Tcl_CreateInterp). */
|
2534 |
register Tcl_Obj *objPtr; /* Pointer to object containing
|
2535 |
* commands to execute. */
|
2536 |
int flags; /* Collection of OR-ed bits that
|
2537 |
* control the evaluation of the
|
2538 |
* script. Supported values are
|
2539 |
* TCL_EVAL_GLOBAL and
|
2540 |
* TCL_EVAL_DIRECT. */
|
2541 |
{
|
2542 |
register Interp *iPtr = (Interp *) interp;
|
2543 |
int evalFlags; /* Interp->evalFlags value when the
|
2544 |
* procedure was called. */
|
2545 |
register ByteCode* codePtr; /* Tcl Internal type of bytecode. */
|
2546 |
int oldCount = iPtr->cmdCount; /* Used to tell whether any commands
|
2547 |
* at all were executed. */
|
2548 |
int numSrcBytes;
|
2549 |
int result;
|
2550 |
CallFrame *savedVarFramePtr; /* Saves old copy of iPtr->varFramePtr
|
2551 |
* in case TCL_EVAL_GLOBAL was set. */
|
2552 |
Namespace *namespacePtr;
|
2553 |
|
2554 |
Tcl_IncrRefCount(objPtr);
|
2555 |
|
2556 |
if ((iPtr->flags & USE_EVAL_DIRECT) || (flags & TCL_EVAL_DIRECT)) {
|
2557 |
/*
|
2558 |
* We're not supposed to use the compiler or byte-code interpreter.
|
2559 |
* Let Tcl_EvalEx evaluate the command directly (and probably
|
2560 |
* more slowly).
|
2561 |
*
|
2562 |
* Pure List Optimization (no string representation). In this
|
2563 |
* case, we can safely use Tcl_EvalObjv instead and get an
|
2564 |
* appreciable improvement in execution speed. This is because it
|
2565 |
* allows us to avoid a setFromAny step that would just pack
|
2566 |
* everything into a string and back out again.
|
2567 |
*
|
2568 |
* USE_EVAL_DIRECT is a special flag used for testing purpose only
|
2569 |
* (ensure we go into the TCL_EVAL_DIRECT path, avoiding opt)
|
2570 |
*/
|
2571 |
if (!(iPtr->flags & USE_EVAL_DIRECT) &&
|
2572 |
(objPtr->typePtr == &tclListType) && /* is a list... */
|
2573 |
(objPtr->bytes == NULL) /* ...without a string rep */) {
|
2574 |
register List *listRepPtr =
|
2575 |
(List *) objPtr->internalRep.otherValuePtr;
|
2576 |
result = Tcl_EvalObjv(interp, listRepPtr->elemCount,
|
2577 |
listRepPtr->elements, flags);
|
2578 |
} else {
|
2579 |
register char *p;
|
2580 |
p = Tcl_GetStringFromObj(objPtr, &numSrcBytes);
|
2581 |
result = Tcl_EvalEx(interp, p, numSrcBytes, flags);
|
2582 |
}
|
2583 |
Tcl_DecrRefCount(objPtr);
|
2584 |
return result;
|
2585 |
}
|
2586 |
|
2587 |
/*
|
2588 |
* Prevent the object from being deleted as a side effect of evaling it.
|
2589 |
*/
|
2590 |
|
2591 |
savedVarFramePtr = iPtr->varFramePtr;
|
2592 |
if (flags & TCL_EVAL_GLOBAL) {
|
2593 |
iPtr->varFramePtr = NULL;
|
2594 |
}
|
2595 |
|
2596 |
/*
|
2597 |
* Reset both the interpreter's string and object results and clear out
|
2598 |
* any error information. This makes sure that we return an empty
|
2599 |
* result if there are no commands in the command string.
|
2600 |
*/
|
2601 |
|
2602 |
Tcl_ResetResult(interp);
|
2603 |
|
2604 |
/*
|
2605 |
* Check depth of nested calls to Tcl_Eval: if this gets too large,
|
2606 |
* it's probably because of an infinite loop somewhere.
|
2607 |
*/
|
2608 |
|
2609 |
iPtr->numLevels++;
|
2610 |
if (iPtr->numLevels > iPtr->maxNestingDepth) {
|
2611 |
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
2612 |
"too many nested calls to Tcl_EvalObj (infinite loop?)", -1);
|
2613 |
result = TCL_ERROR;
|
2614 |
goto done;
|
2615 |
}
|
2616 |
|
2617 |
/*
|
2618 |
* On the Mac, we will never reach the default recursion limit before
|
2619 |
* blowing the stack. So we need to do a check here.
|
2620 |
*/
|
2621 |
|
2622 |
if (TclpCheckStackSpace() == 0) {
|
2623 |
/*NOTREACHED*/
|
2624 |
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
2625 |
"too many nested calls to Tcl_EvalObj (infinite loop?)", -1);
|
2626 |
result = TCL_ERROR;
|
2627 |
goto done;
|
2628 |
}
|
2629 |
|
2630 |
/*
|
2631 |
* If the interpreter has been deleted, return an error.
|
2632 |
*/
|
2633 |
|
2634 |
if (iPtr->flags & DELETED) {
|
2635 |
Tcl_ResetResult(interp);
|
2636 |
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
2637 |
"attempt to call eval in deleted interpreter", -1);
|
2638 |
Tcl_SetErrorCode(interp, "CORE", "IDELETE",
|
2639 |
"attempt to call eval in deleted interpreter",
|
2640 |
(char *) NULL);
|
2641 |
result = TCL_ERROR;
|
2642 |
goto done;
|
2643 |
}
|
2644 |
|
2645 |
/*
|
2646 |
* Get the ByteCode from the object. If it exists, make sure it hasn't
|
2647 |
* been invalidated by, e.g., someone redefining a command with a
|
2648 |
* compile procedure (this might make the compiled code wrong). If
|
2649 |
* necessary, convert the object to be a ByteCode object and compile it.
|
2650 |
* Also, if the code was compiled in/for a different interpreter,
|
2651 |
* or for a different namespace, or for the same namespace but
|
2652 |
* with different name resolution rules, we recompile it.
|
2653 |
*
|
2654 |
* Precompiled objects, however, are immutable and therefore
|
2655 |
* they are not recompiled, even if the epoch has changed.
|
2656 |
*
|
2657 |
* To be pedantically correct, we should also check that the
|
2658 |
* originating procPtr is the same as the current context procPtr
|
2659 |
* (assuming one exists at all - none for global level). This
|
2660 |
* code is #def'ed out because [info body] was changed to never
|
2661 |
* return a bytecode type object, which should obviate us from
|
2662 |
* the extra checks here.
|
2663 |
*/
|
2664 |
|
2665 |
if (iPtr->varFramePtr != NULL) {
|
2666 |
namespacePtr = iPtr->varFramePtr->nsPtr;
|
2667 |
} else {
|
2668 |
namespacePtr = iPtr->globalNsPtr;
|
2669 |
}
|
2670 |
|
2671 |
if (objPtr->typePtr == &tclByteCodeType) {
|
2672 |
codePtr = (ByteCode *) objPtr->internalRep.otherValuePtr;
|
2673 |
|
2674 |
if (((Interp *) *codePtr->interpHandle != iPtr)
|
2675 |
|| (codePtr->compileEpoch != iPtr->compileEpoch)
|
2676 |
#ifdef CHECK_PROC_ORIGINATION /* [Bug: 3412 Pedantic] */
|
2677 |
|| (codePtr->procPtr != NULL && !(iPtr->varFramePtr &&
|
2678 |
iPtr->varFramePtr->procPtr == codePtr->procPtr))
|
2679 |
#endif
|
2680 |
|| (codePtr->nsPtr != namespacePtr)
|
2681 |
|| (codePtr->nsEpoch != namespacePtr->resolverEpoch)) {
|
2682 |
if (codePtr->flags & TCL_BYTECODE_PRECOMPILED) {
|
2683 |
if ((Interp *) *codePtr->interpHandle != iPtr) {
|
2684 |
panic("Tcl_EvalObj: compiled script jumped interps");
|
2685 |
}
|
2686 |
codePtr->compileEpoch = iPtr->compileEpoch;
|
2687 |
} else {
|
2688 |
tclByteCodeType.freeIntRepProc(objPtr);
|
2689 |
}
|
2690 |
}
|
2691 |
}
|
2692 |
if (objPtr->typePtr != &tclByteCodeType) {
|
2693 |
iPtr->errorLine = 1;
|
2694 |
result = tclByteCodeType.setFromAnyProc(interp, objPtr);
|
2695 |
if (result != TCL_OK) {
|
2696 |
goto done;
|
2697 |
}
|
2698 |
} else {
|
2699 |
codePtr = (ByteCode *) objPtr->internalRep.otherValuePtr;
|
2700 |
if (((Interp *) *codePtr->interpHandle != iPtr)
|
2701 |
|| (codePtr->compileEpoch != iPtr->compileEpoch)) {
|
2702 |
(*tclByteCodeType.freeIntRepProc)(objPtr);
|
2703 |
iPtr->errorLine = 1;
|
2704 |
result = (*tclByteCodeType.setFromAnyProc)(interp, objPtr);
|
2705 |
if (result != TCL_OK) {
|
2706 |
iPtr->numLevels--;
|
2707 |
return result;
|
2708 |
}
|
2709 |
}
|
2710 |
}
|
2711 |
codePtr = (ByteCode *) objPtr->internalRep.otherValuePtr;
|
2712 |
|
2713 |
/*
|
2714 |
* Extract then reset the compilation flags in the interpreter.
|
2715 |
* Resetting the flags must be done after any compilation.
|
2716 |
*/
|
2717 |
|
2718 |
evalFlags = iPtr->evalFlags;
|
2719 |
iPtr->evalFlags = 0;
|
2720 |
|
2721 |
/*
|
2722 |
* Execute the commands. If the code was compiled from an empty string,
|
2723 |
* don't bother executing the code.
|
2724 |
*/
|
2725 |
|
2726 |
numSrcBytes = codePtr->numSrcBytes;
|
2727 |
if ((numSrcBytes > 0) || (codePtr->flags & TCL_BYTECODE_PRECOMPILED)) {
|
2728 |
/*
|
2729 |
* Increment the code's ref count while it is being executed. If
|
2730 |
* afterwards no references to it remain, free the code.
|
2731 |
*/
|
2732 |
|
2733 |
codePtr->refCount++;
|
2734 |
result = TclExecuteByteCode(interp, codePtr);
|
2735 |
codePtr->refCount--;
|
2736 |
if (codePtr->refCount <= 0) {
|
2737 |
TclCleanupByteCode(codePtr);
|
2738 |
}
|
2739 |
} else {
|
2740 |
result = TCL_OK;
|
2741 |
}
|
2742 |
|
2743 |
/*
|
2744 |
* If no commands at all were executed, check for asynchronous
|
2745 |
* handlers so that they at least get one change to execute.
|
2746 |
* This is needed to handle event loops written in Tcl with
|
2747 |
* empty bodies.
|
2748 |
*/
|
2749 |
|
2750 |
if ((oldCount == iPtr->cmdCount) && Tcl_AsyncReady()) {
|
2751 |
result = Tcl_AsyncInvoke(interp, result);
|
2752 |
}
|
2753 |
|
2754 |
/*
|
2755 |
* Update the interpreter's evaluation level count. If we are again at
|
2756 |
* the top level, process any unusual return code returned by the
|
2757 |
* evaluated code.
|
2758 |
*/
|
2759 |
|
2760 |
if (iPtr->numLevels == 1) {
|
2761 |
if (result == TCL_RETURN) {
|
2762 |
result = TclUpdateReturnInfo(iPtr);
|
2763 |
}
|
2764 |
if ((result != TCL_OK) && (result != TCL_ERROR)
|
2765 |
&& ((evalFlags & TCL_ALLOW_EXCEPTIONS) == 0)) {
|
2766 |
ProcessUnexpectedResult(interp, result);
|
2767 |
result = TCL_ERROR;
|
2768 |
}
|
2769 |
}
|
2770 |
|
2771 |
/*
|
2772 |
* If an error occurred, record information about what was being
|
2773 |
* executed when the error occurred.
|
2774 |
*/
|
2775 |
|
2776 |
if ((result == TCL_ERROR) && !(iPtr->flags & ERR_ALREADY_LOGGED)) {
|
2777 |
RecordTracebackInfo(interp, objPtr, numSrcBytes);
|
2778 |
}
|
2779 |
|
2780 |
/*
|
2781 |
* Set the interpreter's termOffset member to the offset of the
|
2782 |
* character just after the last one executed. We approximate the offset
|
2783 |
* of the last character executed by using the number of characters
|
2784 |
* compiled.
|
2785 |
*/
|
2786 |
|
2787 |
iPtr->termOffset = numSrcBytes;
|
2788 |
iPtr->flags &= ~ERR_ALREADY_LOGGED;
|
2789 |
|
2790 |
done:
|
2791 |
TclDecrRefCount(objPtr);
|
2792 |
iPtr->varFramePtr = savedVarFramePtr;
|
2793 |
iPtr->numLevels--;
|
2794 |
return result;
|
2795 |
}
|
2796 |
|
2797 |
/*
|
2798 |
*----------------------------------------------------------------------
|
2799 |
*
|
2800 |
* ProcessUnexpectedResult --
|
2801 |
*
|
2802 |
* Procedure called by Tcl_EvalObj to set the interpreter's result
|
2803 |
* value to an appropriate error message when the code it evaluates
|
2804 |
* returns an unexpected result code (not TCL_OK and not TCL_ERROR) to
|
2805 |
* the topmost evaluation level.
|
2806 |
*
|
2807 |
* Results:
|
2808 |
* None.
|
2809 |
*
|
2810 |
* Side effects:
|
2811 |
* The interpreter result is set to an error message appropriate to
|
2812 |
* the result code.
|
2813 |
*
|
2814 |
*----------------------------------------------------------------------
|
2815 |
*/
|
2816 |
|
2817 |
static void
|
2818 |
ProcessUnexpectedResult(interp, returnCode)
|
2819 |
Tcl_Interp *interp; /* The interpreter in which the unexpected
|
2820 |
* result code was returned. */
|
2821 |
int returnCode; /* The unexpected result code. */
|
2822 |
{
|
2823 |
Tcl_ResetResult(interp);
|
2824 |
if (returnCode == TCL_BREAK) {
|
2825 |
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
2826 |
"invoked \"break\" outside of a loop", -1);
|
2827 |
} else if (returnCode == TCL_CONTINUE) {
|
2828 |
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
2829 |
"invoked \"continue\" outside of a loop", -1);
|
2830 |
} else {
|
2831 |
char buf[30 + TCL_INTEGER_SPACE];
|
2832 |
|
2833 |
sprintf(buf, "command returned bad code: %d", returnCode);
|
2834 |
Tcl_SetResult(interp, buf, TCL_VOLATILE);
|
2835 |
}
|
2836 |
}
|
2837 |
|
2838 |
/*
|
2839 |
*----------------------------------------------------------------------
|
2840 |
*
|
2841 |
* RecordTracebackInfo --
|
2842 |
*
|
2843 |
* Procedure called by Tcl_EvalObj to record information about what was
|
2844 |
* being executed when the error occurred.
|
2845 |
*
|
2846 |
* Results:
|
2847 |
* None.
|
2848 |
*
|
2849 |
* Side effects:
|
2850 |
* Appends information about the script being evaluated to the
|
2851 |
* interpreter's "errorInfo" variable.
|
2852 |
*
|
2853 |
*----------------------------------------------------------------------
|
2854 |
*/
|
2855 |
|
2856 |
static void
|
2857 |
RecordTracebackInfo(interp, objPtr, numSrcBytes)
|
2858 |
Tcl_Interp *interp; /* The interpreter in which the error
|
2859 |
* occurred. */
|
2860 |
Tcl_Obj *objPtr; /* Points to object containing script whose
|
2861 |
* evaluation resulted in an error. */
|
2862 |
int numSrcBytes; /* Number of bytes compiled in script. */
|
2863 |
{
|
2864 |
Interp *iPtr = (Interp *) interp;
|
2865 |
char buf[200];
|
2866 |
char *ellipsis, *bytes;
|
2867 |
int length;
|
2868 |
|
2869 |
/*
|
2870 |
* Decide how much of the command to print in the error message
|
2871 |
* (up to a certain number of bytes).
|
2872 |
*/
|
2873 |
|
2874 |
bytes = Tcl_GetStringFromObj(objPtr, &length);
|
2875 |
length = TclMin(numSrcBytes, length);
|
2876 |
|
2877 |
ellipsis = "";
|
2878 |
if (length > 150) {
|
2879 |
length = 150;
|
2880 |
ellipsis = " ...";
|
2881 |
}
|
2882 |
|
2883 |
if (!(iPtr->flags & ERR_IN_PROGRESS)) {
|
2884 |
sprintf(buf, "\n while executing\n\"%.*s%s\"",
|
2885 |
length, bytes, ellipsis);
|
2886 |
} else {
|
2887 |
sprintf(buf, "\n invoked from within\n\"%.*s%s\"",
|
2888 |
length, bytes, ellipsis);
|
2889 |
}
|
2890 |
Tcl_AddObjErrorInfo(interp, buf, -1);
|
2891 |
}
|
2892 |
|
2893 |
/*
|
2894 |
*---------------------------------------------------------------------------
|
2895 |
*
|
2896 |
* Tcl_ExprLong, Tcl_ExprDouble, Tcl_ExprBoolean --
|
2897 |
*
|
2898 |
* Procedures to evaluate an expression and return its value in a
|
2899 |
* particular form.
|
2900 |
*
|
2901 |
* Results:
|
2902 |
* Each of the procedures below returns a standard Tcl result. If an
|
2903 |
* error occurs then an error message is left in the interp's result.
|
2904 |
* Otherwise the value of the expression, in the appropriate form,
|
2905 |
* is stored at *ptr. If the expression had a result that was
|
2906 |
* incompatible with the desired form then an error is returned.
|
2907 |
*
|
2908 |
* Side effects:
|
2909 |
* None.
|
2910 |
*
|
2911 |
*---------------------------------------------------------------------------
|
2912 |
*/
|
2913 |
|
2914 |
int
|
2915 |
Tcl_ExprLong(interp, string, ptr)
|
2916 |
Tcl_Interp *interp; /* Context in which to evaluate the
|
2917 |
* expression. */
|
2918 |
char *string; /* Expression to evaluate. */
|
2919 |
long *ptr; /* Where to store result. */
|
2920 |
{
|
2921 |
register Tcl_Obj *exprPtr;
|
2922 |
Tcl_Obj *resultPtr;
|
2923 |
int length = strlen(string);
|
2924 |
int result = TCL_OK;
|
2925 |
|
2926 |
if (length > 0) {
|
2927 |
exprPtr = Tcl_NewStringObj(string, length);
|
2928 |
Tcl_IncrRefCount(exprPtr);
|
2929 |
result = Tcl_ExprObj(interp, exprPtr, &resultPtr);
|
2930 |
if (result == TCL_OK) {
|
2931 |
/*
|
2932 |
* Store an integer based on the expression result.
|
2933 |
*/
|
2934 |
|
2935 |
if (resultPtr->typePtr == &tclIntType) {
|
2936 |
*ptr = resultPtr->internalRep.longValue;
|
2937 |
} else if (resultPtr->typePtr == &tclDoubleType) {
|
2938 |
*ptr = (long) resultPtr->internalRep.doubleValue;
|
2939 |
} else {
|
2940 |
Tcl_SetResult(interp,
|
2941 |
"expression didn't have numeric value", TCL_STATIC);
|
2942 |
result = TCL_ERROR;
|
2943 |
}
|
2944 |
Tcl_DecrRefCount(resultPtr); /* discard the result object */
|
2945 |
} else {
|
2946 |
/*
|
2947 |
* Move the interpreter's object result to the string result,
|
2948 |
* then reset the object result.
|
2949 |
*/
|
2950 |
|
2951 |
Tcl_SetResult(interp, TclGetString(Tcl_GetObjResult(interp)),
|
2952 |
TCL_VOLATILE);
|
2953 |
}
|
2954 |
Tcl_DecrRefCount(exprPtr); /* discard the expression object */
|
2955 |
} else {
|
2956 |
/*
|
2957 |
* An empty string. Just set the result integer to 0.
|
2958 |
*/
|
2959 |
|
2960 |
*ptr = 0;
|
2961 |
}
|
2962 |
return result;
|
2963 |
}
|
2964 |
|
2965 |
int
|
2966 |
Tcl_ExprDouble(interp, string, ptr)
|
2967 |
Tcl_Interp *interp; /* Context in which to evaluate the
|
2968 |
* expression. */
|
2969 |
char *string; /* Expression to evaluate. */
|
2970 |
double *ptr; /* Where to store result. */
|
2971 |
{
|
2972 |
register Tcl_Obj *exprPtr;
|
2973 |
Tcl_Obj *resultPtr;
|
2974 |
int length = strlen(string);
|
2975 |
int result = TCL_OK;
|
2976 |
|
2977 |
if (length > 0) {
|
2978 |
exprPtr = Tcl_NewStringObj(string, length);
|
2979 |
Tcl_IncrRefCount(exprPtr);
|
2980 |
result = Tcl_ExprObj(interp, exprPtr, &resultPtr);
|
2981 |
if (result == TCL_OK) {
|
2982 |
/*
|
2983 |
* Store a double based on the expression result.
|
2984 |
*/
|
2985 |
|
2986 |
if (resultPtr->typePtr == &tclIntType) {
|
2987 |
*ptr = (double) resultPtr->internalRep.longValue;
|
2988 |
} else if (resultPtr->typePtr == &tclDoubleType) {
|
2989 |
*ptr = resultPtr->internalRep.doubleValue;
|
2990 |
} else {
|
2991 |
Tcl_SetResult(interp,
|
2992 |
"expression didn't have numeric value", TCL_STATIC);
|
2993 |
result = TCL_ERROR;
|
2994 |
}
|
2995 |
Tcl_DecrRefCount(resultPtr); /* discard the result object */
|
2996 |
} else {
|
2997 |
/*
|
2998 |
* Move the interpreter's object result to the string result,
|
2999 |
* then reset the object result.
|
3000 |
*/
|
3001 |
|
3002 |
Tcl_SetResult(interp, TclGetString(Tcl_GetObjResult(interp)),
|
3003 |
TCL_VOLATILE);
|
3004 |
}
|
3005 |
Tcl_DecrRefCount(exprPtr); /* discard the expression object */
|
3006 |
} else {
|
3007 |
/*
|
3008 |
* An empty string. Just set the result double to 0.0.
|
3009 |
*/
|
3010 |
|
3011 |
*ptr = 0.0;
|
3012 |
}
|
3013 |
return result;
|
3014 |
}
|
3015 |
|
3016 |
int
|
3017 |
Tcl_ExprBoolean(interp, string, ptr)
|
3018 |
Tcl_Interp *interp; /* Context in which to evaluate the
|
3019 |
* expression. */
|
3020 |
char *string; /* Expression to evaluate. */
|
3021 |
int *ptr; /* Where to store 0/1 result. */
|
3022 |
{
|
3023 |
register Tcl_Obj *exprPtr;
|
3024 |
Tcl_Obj *resultPtr;
|
3025 |
int length = strlen(string);
|
3026 |
int result = TCL_OK;
|
3027 |
|
3028 |
if (length > 0) {
|
3029 |
exprPtr = Tcl_NewStringObj(string, length);
|
3030 |
Tcl_IncrRefCount(exprPtr);
|
3031 |
result = Tcl_ExprObj(interp, exprPtr, &resultPtr);
|
3032 |
if (result == TCL_OK) {
|
3033 |
/*
|
3034 |
* Store a boolean based on the expression result.
|
3035 |
*/
|
3036 |
|
3037 |
if (resultPtr->typePtr == &tclIntType) {
|
3038 |
*ptr = (resultPtr->internalRep.longValue != 0);
|
3039 |
} else if (resultPtr->typePtr == &tclDoubleType) {
|
3040 |
*ptr = (resultPtr->internalRep.doubleValue != 0.0);
|
3041 |
} else {
|
3042 |
result = Tcl_GetBooleanFromObj(interp, resultPtr, ptr);
|
3043 |
}
|
3044 |
Tcl_DecrRefCount(resultPtr); /* discard the result object */
|
3045 |
}
|
3046 |
if (result != TCL_OK) {
|
3047 |
/*
|
3048 |
* Move the interpreter's object result to the string result,
|
3049 |
* then reset the object result.
|
3050 |
*/
|
3051 |
|
3052 |
Tcl_SetResult(interp, TclGetString(Tcl_GetObjResult(interp)),
|
3053 |
TCL_VOLATILE);
|
3054 |
}
|
3055 |
Tcl_DecrRefCount(exprPtr); /* discard the expression object */
|
3056 |
} else {
|
3057 |
/*
|
3058 |
* An empty string. Just set the result boolean to 0 (false).
|
3059 |
*/
|
3060 |
|
3061 |
*ptr = 0;
|
3062 |
}
|
3063 |
return result;
|
3064 |
}
|
3065 |
|
3066 |
/*
|
3067 |
*--------------------------------------------------------------
|
3068 |
*
|
3069 |
* Tcl_ExprLongObj, Tcl_ExprDoubleObj, Tcl_ExprBooleanObj --
|
3070 |
*
|
3071 |
* Procedures to evaluate an expression in an object and return its
|
3072 |
* value in a particular form.
|
3073 |
*
|
3074 |
* Results:
|
3075 |
* Each of the procedures below returns a standard Tcl result
|
3076 |
* object. If an error occurs then an error message is left in the
|
3077 |
* interpreter's result. Otherwise the value of the expression, in the
|
3078 |
* appropriate form, is stored at *ptr. If the expression had a result
|
3079 |
* that was incompatible with the desired form then an error is
|
3080 |
* returned.
|
3081 |
*
|
3082 |
* Side effects:
|
3083 |
* None.
|
3084 |
*
|
3085 |
*--------------------------------------------------------------
|
3086 |
*/
|
3087 |
|
3088 |
int
|
3089 |
Tcl_ExprLongObj(interp, objPtr, ptr)
|
3090 |
Tcl_Interp *interp; /* Context in which to evaluate the
|
3091 |
* expression. */
|
3092 |
register Tcl_Obj *objPtr; /* Expression to evaluate. */
|
3093 |
long *ptr; /* Where to store long result. */
|
3094 |
{
|
3095 |
Tcl_Obj *resultPtr;
|
3096 |
int result;
|
3097 |
|
3098 |
result = Tcl_ExprObj(interp, objPtr, &resultPtr);
|
3099 |
if (result == TCL_OK) {
|
3100 |
if (resultPtr->typePtr == &tclIntType) {
|
3101 |
*ptr = resultPtr->internalRep.longValue;
|
3102 |
} else if (resultPtr->typePtr == &tclDoubleType) {
|
3103 |
*ptr = (long) resultPtr->internalRep.doubleValue;
|
3104 |
} else {
|
3105 |
result = Tcl_GetLongFromObj(interp, resultPtr, ptr);
|
3106 |
if (result != TCL_OK) {
|
3107 |
return result;
|
3108 |
}
|
3109 |
}
|
3110 |
Tcl_DecrRefCount(resultPtr); /* discard the result object */
|
3111 |
}
|
3112 |
return result;
|
3113 |
}
|
3114 |
|
3115 |
int
|
3116 |
Tcl_ExprDoubleObj(interp, objPtr, ptr)
|
3117 |
Tcl_Interp *interp; /* Context in which to evaluate the
|
3118 |
* expression. */
|
3119 |
register Tcl_Obj *objPtr; /* Expression to evaluate. */
|
3120 |
double *ptr; /* Where to store double result. */
|
3121 |
{
|
3122 |
Tcl_Obj *resultPtr;
|
3123 |
int result;
|
3124 |
|
3125 |
result = Tcl_ExprObj(interp, objPtr, &resultPtr);
|
3126 |
if (result == TCL_OK) {
|
3127 |
if (resultPtr->typePtr == &tclIntType) {
|
3128 |
*ptr = (double) resultPtr->internalRep.longValue;
|
3129 |
} else if (resultPtr->typePtr == &tclDoubleType) {
|
3130 |
*ptr = resultPtr->internalRep.doubleValue;
|
3131 |
} else {
|
3132 |
result = Tcl_GetDoubleFromObj(interp, resultPtr, ptr);
|
3133 |
if (result != TCL_OK) {
|
3134 |
return result;
|
3135 |
}
|
3136 |
}
|
3137 |
Tcl_DecrRefCount(resultPtr); /* discard the result object */
|
3138 |
}
|
3139 |
return result;
|
3140 |
}
|
3141 |
|
3142 |
int
|
3143 |
Tcl_ExprBooleanObj(interp, objPtr, ptr)
|
3144 |
Tcl_Interp *interp; /* Context in which to evaluate the
|
3145 |
* expression. */
|
3146 |
register Tcl_Obj *objPtr; /* Expression to evaluate. */
|
3147 |
int *ptr; /* Where to store 0/1 result. */
|
3148 |
{
|
3149 |
Tcl_Obj *resultPtr;
|
3150 |
int result;
|
3151 |
|
3152 |
result = Tcl_ExprObj(interp, objPtr, &resultPtr);
|
3153 |
if (result == TCL_OK) {
|
3154 |
if (resultPtr->typePtr == &tclIntType) {
|
3155 |
*ptr = (resultPtr->internalRep.longValue != 0);
|
3156 |
} else if (resultPtr->typePtr == &tclDoubleType) {
|
3157 |
*ptr = (resultPtr->internalRep.doubleValue != 0.0);
|
3158 |
} else {
|
3159 |
result = Tcl_GetBooleanFromObj(interp, resultPtr, ptr);
|
3160 |
}
|
3161 |
Tcl_DecrRefCount(resultPtr); /* discard the result object */
|
3162 |
}
|
3163 |
return result;
|
3164 |
}
|
3165 |
|
3166 |
/*
|
3167 |
*----------------------------------------------------------------------
|
3168 |
*
|
3169 |
* TclInvoke --
|
3170 |
*
|
3171 |
* Invokes a Tcl command, given an argv/argc, from either the
|
3172 |
* exposed or the hidden sets of commands in the given interpreter.
|
3173 |
* NOTE: The command is invoked in the current stack frame of
|
3174 |
* the interpreter, thus it can modify local variables.
|
3175 |
*
|
3176 |
* Results:
|
3177 |
* A standard Tcl result.
|
3178 |
*
|
3179 |
* Side effects:
|
3180 |
* Whatever the command does.
|
3181 |
*
|
3182 |
*----------------------------------------------------------------------
|
3183 |
*/
|
3184 |
|
3185 |
int
|
3186 |
TclInvoke(interp, argc, argv, flags)
|
3187 |
Tcl_Interp *interp; /* Where to invoke the command. */
|
3188 |
int argc; /* Count of args. */
|
3189 |
register char **argv; /* The arg strings; argv[0] is the name of
|
3190 |
* the command to invoke. */
|
3191 |
int flags; /* Combination of flags controlling the
|
3192 |
* call: TCL_INVOKE_HIDDEN and
|
3193 |
* TCL_INVOKE_NO_UNKNOWN. */
|
3194 |
{
|
3195 |
register Tcl_Obj *objPtr;
|
3196 |
register int i;
|
3197 |
int length, result;
|
3198 |
|
3199 |
/*
|
3200 |
* This procedure generates an objv array for object arguments that hold
|
3201 |
* the argv strings. It starts out with stack-allocated space but uses
|
3202 |
* dynamically-allocated storage if needed.
|
3203 |
*/
|
3204 |
|
3205 |
#define NUM_ARGS 20
|
3206 |
Tcl_Obj *(objStorage[NUM_ARGS]);
|
3207 |
register Tcl_Obj **objv = objStorage;
|
3208 |
|
3209 |
/*
|
3210 |
* Create the object argument array "objv". Make sure objv is large
|
3211 |
* enough to hold the objc arguments plus 1 extra for the zero
|
3212 |
* end-of-objv word.
|
3213 |
*/
|
3214 |
|
3215 |
if ((argc + 1) > NUM_ARGS) {
|
3216 |
objv = (Tcl_Obj **)
|
3217 |
ckalloc((unsigned)(argc + 1) * sizeof(Tcl_Obj *));
|
3218 |
}
|
3219 |
|
3220 |
for (i = 0; i < argc; i++) {
|
3221 |
length = strlen(argv[i]);
|
3222 |
objv[i] = Tcl_NewStringObj(argv[i], length);
|
3223 |
Tcl_IncrRefCount(objv[i]);
|
3224 |
}
|
3225 |
objv[argc] = 0;
|
3226 |
|
3227 |
/*
|
3228 |
* Use TclObjInterpProc to actually invoke the command.
|
3229 |
*/
|
3230 |
|
3231 |
result = TclObjInvoke(interp, argc, objv, flags);
|
3232 |
|
3233 |
/*
|
3234 |
* Move the interpreter's object result to the string result,
|
3235 |
* then reset the object result.
|
3236 |
*/
|
3237 |
|
3238 |
Tcl_SetResult(interp, TclGetString(Tcl_GetObjResult(interp)),
|
3239 |
TCL_VOLATILE);
|
3240 |
|
3241 |
/*
|
3242 |
* Decrement the ref counts on the objv elements since we are done
|
3243 |
* with them.
|
3244 |
*/
|
3245 |
|
3246 |
for (i = 0; i < argc; i++) {
|
3247 |
objPtr = objv[i];
|
3248 |
Tcl_DecrRefCount(objPtr);
|
3249 |
}
|
3250 |
|
3251 |
/*
|
3252 |
* Free the objv array if malloc'ed storage was used.
|
3253 |
*/
|
3254 |
|
3255 |
if (objv != objStorage) {
|
3256 |
ckfree((char *) objv);
|
3257 |
}
|
3258 |
return result;
|
3259 |
#undef NUM_ARGS
|
3260 |
}
|
3261 |
|
3262 |
/*
|
3263 |
*----------------------------------------------------------------------
|
3264 |
*
|
3265 |
* TclGlobalInvoke --
|
3266 |
*
|
3267 |
* Invokes a Tcl command, given an argv/argc, from either the
|
3268 |
* exposed or hidden sets of commands in the given interpreter.
|
3269 |
* NOTE: The command is invoked in the global stack frame of
|
3270 |
* the interpreter, thus it cannot see any current state on
|
3271 |
* the stack for that interpreter.
|
3272 |
*
|
3273 |
* Results:
|
3274 |
* A standard Tcl result.
|
3275 |
*
|
3276 |
* Side effects:
|
3277 |
* Whatever the command does.
|
3278 |
*
|
3279 |
*----------------------------------------------------------------------
|
3280 |
*/
|
3281 |
|
3282 |
int
|
3283 |
TclGlobalInvoke(interp, argc, argv, flags)
|
3284 |
Tcl_Interp *interp; /* Where to invoke the command. */
|
3285 |
int argc; /* Count of args. */
|
3286 |
register char **argv; /* The arg strings; argv[0] is the name of
|
3287 |
* the command to invoke. */
|
3288 |
int flags; /* Combination of flags controlling the
|
3289 |
* call: TCL_INVOKE_HIDDEN and
|
3290 |
* TCL_INVOKE_NO_UNKNOWN. */
|
3291 |
{
|
3292 |
register Interp *iPtr = (Interp *) interp;
|
3293 |
int result;
|
3294 |
CallFrame *savedVarFramePtr;
|
3295 |
|
3296 |
savedVarFramePtr = iPtr->varFramePtr;
|
3297 |
iPtr->varFramePtr = NULL;
|
3298 |
result = TclInvoke(interp, argc, argv, flags);
|
3299 |
iPtr->varFramePtr = savedVarFramePtr;
|
3300 |
return result;
|
3301 |
}
|
3302 |
|
3303 |
/*
|
3304 |
*----------------------------------------------------------------------
|
3305 |
*
|
3306 |
* TclObjInvokeGlobal --
|
3307 |
*
|
3308 |
* Object version: Invokes a Tcl command, given an objv/objc, from
|
3309 |
* either the exposed or hidden set of commands in the given
|
3310 |
* interpreter.
|
3311 |
* NOTE: The command is invoked in the global stack frame of the
|
3312 |
* interpreter, thus it cannot see any current state on the
|
3313 |
* stack of that interpreter.
|
3314 |
*
|
3315 |
* Results:
|
3316 |
* A standard Tcl result.
|
3317 |
*
|
3318 |
* Side effects:
|
3319 |
* Whatever the command does.
|
3320 |
*
|
3321 |
*----------------------------------------------------------------------
|
3322 |
*/
|
3323 |
|
3324 |
int
|
3325 |
TclObjInvokeGlobal(interp, objc, objv, flags)
|
3326 |
Tcl_Interp *interp; /* Interpreter in which command is to be
|
3327 |
* invoked. */
|
3328 |
int objc; /* Count of arguments. */
|
3329 |
Tcl_Obj *CONST objv[]; /* Argument objects; objv[0] points to the
|
3330 |
* name of the command to invoke. */
|
3331 |
int flags; /* Combination of flags controlling the
|
3332 |
* call: TCL_INVOKE_HIDDEN,
|
3333 |
* TCL_INVOKE_NO_UNKNOWN, or
|
3334 |
* TCL_INVOKE_NO_TRACEBACK. */
|
3335 |
{
|
3336 |
register Interp *iPtr = (Interp *) interp;
|
3337 |
int result;
|
3338 |
CallFrame *savedVarFramePtr;
|
3339 |
|
3340 |
savedVarFramePtr = iPtr->varFramePtr;
|
3341 |
iPtr->varFramePtr = NULL;
|
3342 |
result = TclObjInvoke(interp, objc, objv, flags);
|
3343 |
iPtr->varFramePtr = savedVarFramePtr;
|
3344 |
return result;
|
3345 |
}
|
3346 |
|
3347 |
/*
|
3348 |
*----------------------------------------------------------------------
|
3349 |
*
|
3350 |
* TclObjInvoke --
|
3351 |
*
|
3352 |
* Invokes a Tcl command, given an objv/objc, from either the
|
3353 |
* exposed or the hidden sets of commands in the given interpreter.
|
3354 |
*
|
3355 |
* Results:
|
3356 |
* A standard Tcl object result.
|
3357 |
*
|
3358 |
* Side effects:
|
3359 |
* Whatever the command does.
|
3360 |
*
|
3361 |
*----------------------------------------------------------------------
|
3362 |
*/
|
3363 |
|
3364 |
int
|
3365 |
TclObjInvoke(interp, objc, objv, flags)
|
3366 |
Tcl_Interp *interp; /* Interpreter in which command is to be
|
3367 |
* invoked. */
|
3368 |
int objc; /* Count of arguments. */
|
3369 |
Tcl_Obj *CONST objv[]; /* Argument objects; objv[0] points to the
|
3370 |
* name of the command to invoke. */
|
3371 |
int flags; /* Combination of flags controlling the
|
3372 |
* call: TCL_INVOKE_HIDDEN,
|
3373 |
* TCL_INVOKE_NO_UNKNOWN, or
|
3374 |
* TCL_INVOKE_NO_TRACEBACK. */
|
3375 |
{
|
3376 |
register Interp *iPtr = (Interp *) interp;
|
3377 |
Tcl_HashTable *hTblPtr; /* Table of hidden commands. */
|
3378 |
char *cmdName; /* Name of the command from objv[0]. */
|
3379 |
register Tcl_HashEntry *hPtr;
|
3380 |
Tcl_Command cmd;
|
3381 |
Command *cmdPtr;
|
3382 |
int localObjc; /* Used to invoke "unknown" if the */
|
3383 |
Tcl_Obj **localObjv = NULL; /* command is not found. */
|
3384 |
register int i;
|
3385 |
int length, result;
|
3386 |
char *bytes;
|
3387 |
|
3388 |
if (interp == (Tcl_Interp *) NULL) {
|
3389 |
return TCL_ERROR;
|
3390 |
}
|
3391 |
|
3392 |
if ((objc < 1) || (objv == (Tcl_Obj **) NULL)) {
|
3393 |
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
3394 |
"illegal argument vector", -1);
|
3395 |
return TCL_ERROR;
|
3396 |
}
|
3397 |
|
3398 |
cmdName = Tcl_GetString(objv[0]);
|
3399 |
if (flags & TCL_INVOKE_HIDDEN) {
|
3400 |
/*
|
3401 |
* We never invoke "unknown" for hidden commands.
|
3402 |
*/
|
3403 |
|
3404 |
hPtr = NULL;
|
3405 |
hTblPtr = ((Interp *) interp)->hiddenCmdTablePtr;
|
3406 |
if (hTblPtr != NULL) {
|
3407 |
hPtr = Tcl_FindHashEntry(hTblPtr, cmdName);
|
3408 |
}
|
3409 |
if (hPtr == NULL) {
|
3410 |
Tcl_ResetResult(interp);
|
3411 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
3412 |
"invalid hidden command name \"", cmdName, "\"",
|
3413 |
(char *) NULL);
|
3414 |
return TCL_ERROR;
|
3415 |
}
|
3416 |
cmdPtr = (Command *) Tcl_GetHashValue(hPtr);
|
3417 |
} else {
|
3418 |
cmdPtr = NULL;
|
3419 |
cmd = Tcl_FindCommand(interp, cmdName,
|
3420 |
(Tcl_Namespace *) NULL, /*flags*/ TCL_GLOBAL_ONLY);
|
3421 |
if (cmd != (Tcl_Command) NULL) {
|
3422 |
cmdPtr = (Command *) cmd;
|
3423 |
}
|
3424 |
if (cmdPtr == NULL) {
|
3425 |
if (!(flags & TCL_INVOKE_NO_UNKNOWN)) {
|
3426 |
cmd = Tcl_FindCommand(interp, "unknown",
|
3427 |
(Tcl_Namespace *) NULL, /*flags*/ TCL_GLOBAL_ONLY);
|
3428 |
if (cmd != (Tcl_Command) NULL) {
|
3429 |
cmdPtr = (Command *) cmd;
|
3430 |
}
|
3431 |
if (cmdPtr != NULL) {
|
3432 |
localObjc = (objc + 1);
|
3433 |
localObjv = (Tcl_Obj **)
|
3434 |
ckalloc((unsigned) (sizeof(Tcl_Obj *) * localObjc));
|
3435 |
localObjv[0] = Tcl_NewStringObj("unknown", -1);
|
3436 |
Tcl_IncrRefCount(localObjv[0]);
|
3437 |
for (i = 0; i < objc; i++) {
|
3438 |
localObjv[i+1] = objv[i];
|
3439 |
}
|
3440 |
objc = localObjc;
|
3441 |
objv = localObjv;
|
3442 |
}
|
3443 |
}
|
3444 |
|
3445 |
/*
|
3446 |
* Check again if we found the command. If not, "unknown" is
|
3447 |
* not present and we cannot help, or the caller said not to
|
3448 |
* call "unknown" (they specified TCL_INVOKE_NO_UNKNOWN).
|
3449 |
*/
|
3450 |
|
3451 |
if (cmdPtr == NULL) {
|
3452 |
Tcl_ResetResult(interp);
|
3453 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
3454 |
"invalid command name \"", cmdName, "\"",
|
3455 |
(char *) NULL);
|
3456 |
return TCL_ERROR;
|
3457 |
}
|
3458 |
}
|
3459 |
}
|
3460 |
|
3461 |
/*
|
3462 |
* Invoke the command procedure. First reset the interpreter's string
|
3463 |
* and object results to their default empty values since they could
|
3464 |
* have gotten changed by earlier invocations.
|
3465 |
*/
|
3466 |
|
3467 |
Tcl_ResetResult(interp);
|
3468 |
iPtr->cmdCount++;
|
3469 |
result = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, objc, objv);
|
3470 |
|
3471 |
/*
|
3472 |
* If an error occurred, record information about what was being
|
3473 |
* executed when the error occurred.
|
3474 |
*/
|
3475 |
|
3476 |
if ((result == TCL_ERROR)
|
3477 |
&& ((flags & TCL_INVOKE_NO_TRACEBACK) == 0)
|
3478 |
&& ((iPtr->flags & ERR_ALREADY_LOGGED) == 0)) {
|
3479 |
Tcl_DString ds;
|
3480 |
|
3481 |
Tcl_DStringInit(&ds);
|
3482 |
if (!(iPtr->flags & ERR_IN_PROGRESS)) {
|
3483 |
Tcl_DStringAppend(&ds, "\n while invoking\n\"", -1);
|
3484 |
} else {
|
3485 |
Tcl_DStringAppend(&ds, "\n invoked from within\n\"", -1);
|
3486 |
}
|
3487 |
for (i = 0; i < objc; i++) {
|
3488 |
bytes = Tcl_GetStringFromObj(objv[i], &length);
|
3489 |
Tcl_DStringAppend(&ds, bytes, length);
|
3490 |
if (i < (objc - 1)) {
|
3491 |
Tcl_DStringAppend(&ds, " ", -1);
|
3492 |
} else if (Tcl_DStringLength(&ds) > 100) {
|
3493 |
Tcl_DStringSetLength(&ds, 100);
|
3494 |
Tcl_DStringAppend(&ds, "...", -1);
|
3495 |
break;
|
3496 |
}
|
3497 |
}
|
3498 |
|
3499 |
Tcl_DStringAppend(&ds, "\"", -1);
|
3500 |
Tcl_AddObjErrorInfo(interp, Tcl_DStringValue(&ds), -1);
|
3501 |
Tcl_DStringFree(&ds);
|
3502 |
iPtr->flags &= ~ERR_ALREADY_LOGGED;
|
3503 |
}
|
3504 |
|
3505 |
/*
|
3506 |
* Free any locally allocated storage used to call "unknown".
|
3507 |
*/
|
3508 |
|
3509 |
if (localObjv != (Tcl_Obj **) NULL) {
|
3510 |
Tcl_DecrRefCount(localObjv[0]);
|
3511 |
ckfree((char *) localObjv);
|
3512 |
}
|
3513 |
return result;
|
3514 |
}
|
3515 |
|
3516 |
/*
|
3517 |
*---------------------------------------------------------------------------
|
3518 |
*
|
3519 |
* Tcl_ExprString --
|
3520 |
*
|
3521 |
* Evaluate an expression in a string and return its value in string
|
3522 |
* form.
|
3523 |
*
|
3524 |
* Results:
|
3525 |
* A standard Tcl result. If the result is TCL_OK, then the interp's
|
3526 |
* result is set to the string value of the expression. If the result
|
3527 |
* is TCL_ERROR, then the interp's result contains an error message.
|
3528 |
*
|
3529 |
* Side effects:
|
3530 |
* A Tcl object is allocated to hold a copy of the expression string.
|
3531 |
* This expression object is passed to Tcl_ExprObj and then
|
3532 |
* deallocated.
|
3533 |
*
|
3534 |
*---------------------------------------------------------------------------
|
3535 |
*/
|
3536 |
|
3537 |
int
|
3538 |
Tcl_ExprString(interp, string)
|
3539 |
Tcl_Interp *interp; /* Context in which to evaluate the
|
3540 |
* expression. */
|
3541 |
char *string; /* Expression to evaluate. */
|
3542 |
{
|
3543 |
register Tcl_Obj *exprPtr;
|
3544 |
Tcl_Obj *resultPtr;
|
3545 |
int length = strlen(string);
|
3546 |
char buf[TCL_DOUBLE_SPACE];
|
3547 |
int result = TCL_OK;
|
3548 |
|
3549 |
if (length > 0) {
|
3550 |
TclNewObj(exprPtr);
|
3551 |
TclInitStringRep(exprPtr, string, length);
|
3552 |
Tcl_IncrRefCount(exprPtr);
|
3553 |
|
3554 |
result = Tcl_ExprObj(interp, exprPtr, &resultPtr);
|
3555 |
if (result == TCL_OK) {
|
3556 |
/*
|
3557 |
* Set the interpreter's string result from the result object.
|
3558 |
*/
|
3559 |
|
3560 |
if (resultPtr->typePtr == &tclIntType) {
|
3561 |
sprintf(buf, "%ld", resultPtr->internalRep.longValue);
|
3562 |
Tcl_SetResult(interp, buf, TCL_VOLATILE);
|
3563 |
} else if (resultPtr->typePtr == &tclDoubleType) {
|
3564 |
Tcl_PrintDouble((Tcl_Interp *) NULL,
|
3565 |
resultPtr->internalRep.doubleValue, buf);
|
3566 |
Tcl_SetResult(interp, buf, TCL_VOLATILE);
|
3567 |
} else {
|
3568 |
/*
|
3569 |
* Set interpreter's string result from the result object.
|
3570 |
*/
|
3571 |
|
3572 |
Tcl_SetResult(interp, TclGetString(resultPtr),
|
3573 |
TCL_VOLATILE);
|
3574 |
}
|
3575 |
Tcl_DecrRefCount(resultPtr); /* discard the result object */
|
3576 |
} else {
|
3577 |
/*
|
3578 |
* Move the interpreter's object result to the string result,
|
3579 |
* then reset the object result.
|
3580 |
*/
|
3581 |
|
3582 |
Tcl_SetResult(interp, TclGetString(Tcl_GetObjResult(interp)),
|
3583 |
TCL_VOLATILE);
|
3584 |
}
|
3585 |
Tcl_DecrRefCount(exprPtr); /* discard the expression object */
|
3586 |
} else {
|
3587 |
/*
|
3588 |
* An empty string. Just set the interpreter's result to 0.
|
3589 |
*/
|
3590 |
|
3591 |
Tcl_SetResult(interp, "0", TCL_VOLATILE);
|
3592 |
}
|
3593 |
return result;
|
3594 |
}
|
3595 |
|
3596 |
/*
|
3597 |
*--------------------------------------------------------------
|
3598 |
*
|
3599 |
* Tcl_ExprObj --
|
3600 |
*
|
3601 |
* Evaluate an expression in a Tcl_Obj.
|
3602 |
*
|
3603 |
* Results:
|
3604 |
* A standard Tcl object result. If the result is other than TCL_OK,
|
3605 |
* then the interpreter's result contains an error message. If the
|
3606 |
* result is TCL_OK, then a pointer to the expression's result value
|
3607 |
* object is stored in resultPtrPtr. In that case, the object's ref
|
3608 |
* count is incremented to reflect the reference returned to the
|
3609 |
* caller; the caller is then responsible for the resulting object
|
3610 |
* and must, for example, decrement the ref count when it is finished
|
3611 |
* with the object.
|
3612 |
*
|
3613 |
* Side effects:
|
3614 |
* Any side effects caused by subcommands in the expression, if any.
|
3615 |
* The interpreter result is not modified unless there is an error.
|
3616 |
*
|
3617 |
*--------------------------------------------------------------
|
3618 |
*/
|
3619 |
|
3620 |
int
|
3621 |
Tcl_ExprObj(interp, objPtr, resultPtrPtr)
|
3622 |
Tcl_Interp *interp; /* Context in which to evaluate the
|
3623 |
* expression. */
|
3624 |
register Tcl_Obj *objPtr; /* Points to Tcl object containing
|
3625 |
* expression to evaluate. */
|
3626 |
Tcl_Obj **resultPtrPtr; /* Where the Tcl_Obj* that is the expression
|
3627 |
* result is stored if no errors occur. */
|
3628 |
{
|
3629 |
Interp *iPtr = (Interp *) interp;
|
3630 |
CompileEnv compEnv; /* Compilation environment structure
|
3631 |
* allocated in frame. */
|
3632 |
LiteralTable *localTablePtr = &(compEnv.localLitTable);
|
3633 |
register ByteCode *codePtr = NULL;
|
3634 |
/* Tcl Internal type of bytecode.
|
3635 |
* Initialized to avoid compiler warning. */
|
3636 |
AuxData *auxDataPtr;
|
3637 |
LiteralEntry *entryPtr;
|
3638 |
Tcl_Obj *saveObjPtr;
|
3639 |
char *string;
|
3640 |
int length, i, result;
|
3641 |
|
3642 |
/*
|
3643 |
* First handle some common expressions specially.
|
3644 |
*/
|
3645 |
|
3646 |
string = Tcl_GetStringFromObj(objPtr, &length);
|
3647 |
if (length == 1) {
|
3648 |
if (*string == '0') {
|
3649 |
*resultPtrPtr = Tcl_NewLongObj(0);
|
3650 |
Tcl_IncrRefCount(*resultPtrPtr);
|
3651 |
return TCL_OK;
|
3652 |
} else if (*string == '1') {
|
3653 |
*resultPtrPtr = Tcl_NewLongObj(1);
|
3654 |
Tcl_IncrRefCount(*resultPtrPtr);
|
3655 |
return TCL_OK;
|
3656 |
}
|
3657 |
} else if ((length == 2) && (*string == '!')) {
|
3658 |
if (*(string+1) == '0') {
|
3659 |
*resultPtrPtr = Tcl_NewLongObj(1);
|
3660 |
Tcl_IncrRefCount(*resultPtrPtr);
|
3661 |
return TCL_OK;
|
3662 |
} else if (*(string+1) == '1') {
|
3663 |
*resultPtrPtr = Tcl_NewLongObj(0);
|
3664 |
Tcl_IncrRefCount(*resultPtrPtr);
|
3665 |
return TCL_OK;
|
3666 |
}
|
3667 |
}
|
3668 |
|
3669 |
/*
|
3670 |
* Get the ByteCode from the object. If it exists, make sure it hasn't
|
3671 |
* been invalidated by, e.g., someone redefining a command with a
|
3672 |
* compile procedure (this might make the compiled code wrong). If
|
3673 |
* necessary, convert the object to be a ByteCode object and compile it.
|
3674 |
* Also, if the code was compiled in/for a different interpreter, we
|
3675 |
* recompile it.
|
3676 |
*
|
3677 |
* Precompiled expressions, however, are immutable and therefore
|
3678 |
* they are not recompiled, even if the epoch has changed.
|
3679 |
*
|
3680 |
*/
|
3681 |
|
3682 |
if (objPtr->typePtr == &tclByteCodeType) {
|
3683 |
codePtr = (ByteCode *) objPtr->internalRep.otherValuePtr;
|
3684 |
if (((Interp *) *codePtr->interpHandle != iPtr)
|
3685 |
|| (codePtr->compileEpoch != iPtr->compileEpoch)) {
|
3686 |
if (codePtr->flags & TCL_BYTECODE_PRECOMPILED) {
|
3687 |
if ((Interp *) *codePtr->interpHandle != iPtr) {
|
3688 |
panic("Tcl_ExprObj: compiled expression jumped interps");
|
3689 |
}
|
3690 |
codePtr->compileEpoch = iPtr->compileEpoch;
|
3691 |
} else {
|
3692 |
(*tclByteCodeType.freeIntRepProc)(objPtr);
|
3693 |
objPtr->typePtr = (Tcl_ObjType *) NULL;
|
3694 |
}
|
3695 |
}
|
3696 |
}
|
3697 |
if (objPtr->typePtr != &tclByteCodeType) {
|
3698 |
TclInitCompileEnv(interp, &compEnv, string, length);
|
3699 |
result = TclCompileExpr(interp, string, length, &compEnv);
|
3700 |
|
3701 |
/*
|
3702 |
* Free the compilation environment's literal table bucket array if
|
3703 |
* it was dynamically allocated.
|
3704 |
*/
|
3705 |
|
3706 |
if (localTablePtr->buckets != localTablePtr->staticBuckets) {
|
3707 |
ckfree((char *) localTablePtr->buckets);
|
3708 |
}
|
3709 |
|
3710 |
if (result != TCL_OK) {
|
3711 |
/*
|
3712 |
* Compilation errors. Free storage allocated for compilation.
|
3713 |
*/
|
3714 |
|
3715 |
#ifdef TCL_COMPILE_DEBUG
|
3716 |
TclVerifyLocalLiteralTable(&compEnv);
|
3717 |
#endif /*TCL_COMPILE_DEBUG*/
|
3718 |
entryPtr = compEnv.literalArrayPtr;
|
3719 |
for (i = 0; i < compEnv.literalArrayNext; i++) {
|
3720 |
TclReleaseLiteral(interp, entryPtr->objPtr);
|
3721 |
entryPtr++;
|
3722 |
}
|
3723 |
#ifdef TCL_COMPILE_DEBUG
|
3724 |
TclVerifyGlobalLiteralTable(iPtr);
|
3725 |
#endif /*TCL_COMPILE_DEBUG*/
|
3726 |
|
3727 |
auxDataPtr = compEnv.auxDataArrayPtr;
|
3728 |
for (i = 0; i < compEnv.auxDataArrayNext; i++) {
|
3729 |
if (auxDataPtr->type->freeProc != NULL) {
|
3730 |
auxDataPtr->type->freeProc(auxDataPtr->clientData);
|
3731 |
}
|
3732 |
auxDataPtr++;
|
3733 |
}
|
3734 |
TclFreeCompileEnv(&compEnv);
|
3735 |
return result;
|
3736 |
}
|
3737 |
|
3738 |
/*
|
3739 |
* Successful compilation. If the expression yielded no
|
3740 |
* instructions, push an zero object as the expression's result.
|
3741 |
*/
|
3742 |
|
3743 |
if (compEnv.codeNext == compEnv.codeStart) {
|
3744 |
TclEmitPush(TclRegisterLiteral(&compEnv, "0", 1, /*onHeap*/ 0),
|
3745 |
&compEnv);
|
3746 |
}
|
3747 |
|
3748 |
/*
|
3749 |
* Add a "done" instruction as the last instruction and change the
|
3750 |
* object into a ByteCode object. Ownership of the literal objects
|
3751 |
* and aux data items is given to the ByteCode object.
|
3752 |
*/
|
3753 |
|
3754 |
compEnv.numSrcBytes = iPtr->termOffset;
|
3755 |
TclEmitOpcode(INST_DONE, &compEnv);
|
3756 |
TclInitByteCodeObj(objPtr, &compEnv);
|
3757 |
TclFreeCompileEnv(&compEnv);
|
3758 |
codePtr = (ByteCode *) objPtr->internalRep.otherValuePtr;
|
3759 |
#ifdef TCL_COMPILE_DEBUG
|
3760 |
if (tclTraceCompile == 2) {
|
3761 |
TclPrintByteCodeObj(interp, objPtr);
|
3762 |
}
|
3763 |
#endif /* TCL_COMPILE_DEBUG */
|
3764 |
}
|
3765 |
|
3766 |
/*
|
3767 |
* Execute the expression after first saving the interpreter's result.
|
3768 |
*/
|
3769 |
|
3770 |
saveObjPtr = Tcl_GetObjResult(interp);
|
3771 |
Tcl_IncrRefCount(saveObjPtr);
|
3772 |
Tcl_ResetResult(interp);
|
3773 |
|
3774 |
/*
|
3775 |
* Increment the code's ref count while it is being executed. If
|
3776 |
* afterwards no references to it remain, free the code.
|
3777 |
*/
|
3778 |
|
3779 |
codePtr->refCount++;
|
3780 |
result = TclExecuteByteCode(interp, codePtr);
|
3781 |
codePtr->refCount--;
|
3782 |
if (codePtr->refCount <= 0) {
|
3783 |
TclCleanupByteCode(codePtr);
|
3784 |
objPtr->typePtr = NULL;
|
3785 |
objPtr->internalRep.otherValuePtr = NULL;
|
3786 |
}
|
3787 |
|
3788 |
/*
|
3789 |
* If the expression evaluated successfully, store a pointer to its
|
3790 |
* value object in resultPtrPtr then restore the old interpreter result.
|
3791 |
* We increment the object's ref count to reflect the reference that we
|
3792 |
* are returning to the caller. We also decrement the ref count of the
|
3793 |
* interpreter's result object after calling Tcl_SetResult since we
|
3794 |
* next store into that field directly.
|
3795 |
*/
|
3796 |
|
3797 |
if (result == TCL_OK) {
|
3798 |
*resultPtrPtr = iPtr->objResultPtr;
|
3799 |
Tcl_IncrRefCount(iPtr->objResultPtr);
|
3800 |
|
3801 |
Tcl_SetObjResult(interp, saveObjPtr);
|
3802 |
}
|
3803 |
Tcl_DecrRefCount(saveObjPtr);
|
3804 |
return result;
|
3805 |
}
|
3806 |
|
3807 |
/*
|
3808 |
*----------------------------------------------------------------------
|
3809 |
*
|
3810 |
* Tcl_CreateTrace --
|
3811 |
*
|
3812 |
* Arrange for a procedure to be called to trace command execution.
|
3813 |
*
|
3814 |
* Results:
|
3815 |
* The return value is a token for the trace, which may be passed
|
3816 |
* to Tcl_DeleteTrace to eliminate the trace.
|
3817 |
*
|
3818 |
* Side effects:
|
3819 |
* From now on, proc will be called just before a command procedure
|
3820 |
* is called to execute a Tcl command. Calls to proc will have the
|
3821 |
* following form:
|
3822 |
*
|
3823 |
* void
|
3824 |
* proc(clientData, interp, level, command, cmdProc, cmdClientData,
|
3825 |
* argc, argv)
|
3826 |
* ClientData clientData;
|
3827 |
* Tcl_Interp *interp;
|
3828 |
* int level;
|
3829 |
* char *command;
|
3830 |
* int (*cmdProc)();
|
3831 |
* ClientData cmdClientData;
|
3832 |
* int argc;
|
3833 |
* char **argv;
|
3834 |
* {
|
3835 |
* }
|
3836 |
*
|
3837 |
* The clientData and interp arguments to proc will be the same
|
3838 |
* as the corresponding arguments to this procedure. Level gives
|
3839 |
* the nesting level of command interpretation for this interpreter
|
3840 |
* (0 corresponds to top level). Command gives the ASCII text of
|
3841 |
* the raw command, cmdProc and cmdClientData give the procedure that
|
3842 |
* will be called to process the command and the ClientData value it
|
3843 |
* will receive, and argc and argv give the arguments to the
|
3844 |
* command, after any argument parsing and substitution. Proc
|
3845 |
* does not return a value.
|
3846 |
*
|
3847 |
*----------------------------------------------------------------------
|
3848 |
*/
|
3849 |
|
3850 |
Tcl_Trace
|
3851 |
Tcl_CreateTrace(interp, level, proc, clientData)
|
3852 |
Tcl_Interp *interp; /* Interpreter in which to create trace. */
|
3853 |
int level; /* Only call proc for commands at nesting
|
3854 |
* level<=argument level (1=>top level). */
|
3855 |
Tcl_CmdTraceProc *proc; /* Procedure to call before executing each
|
3856 |
* command. */
|
3857 |
ClientData clientData; /* Arbitrary value word to pass to proc. */
|
3858 |
{
|
3859 |
register Trace *tracePtr;
|
3860 |
register Interp *iPtr = (Interp *) interp;
|
3861 |
|
3862 |
/*
|
3863 |
* Invalidate existing compiled code for this interpreter and arrange
|
3864 |
* (by setting the DONT_COMPILE_CMDS_INLINE flag) that when compiling
|
3865 |
* new code, no commands will be compiled inline (i.e., into an inline
|
3866 |
* sequence of instructions). We do this because commands that were
|
3867 |
* compiled inline will never result in a command trace being called.
|
3868 |
*/
|
3869 |
|
3870 |
iPtr->compileEpoch++;
|
3871 |
iPtr->flags |= DONT_COMPILE_CMDS_INLINE;
|
3872 |
|
3873 |
tracePtr = (Trace *) ckalloc(sizeof(Trace));
|
3874 |
tracePtr->level = level;
|
3875 |
tracePtr->proc = proc;
|
3876 |
tracePtr->clientData = clientData;
|
3877 |
tracePtr->nextPtr = iPtr->tracePtr;
|
3878 |
iPtr->tracePtr = tracePtr;
|
3879 |
|
3880 |
return (Tcl_Trace) tracePtr;
|
3881 |
}
|
3882 |
|
3883 |
/*
|
3884 |
*----------------------------------------------------------------------
|
3885 |
*
|
3886 |
* Tcl_DeleteTrace --
|
3887 |
*
|
3888 |
* Remove a trace.
|
3889 |
*
|
3890 |
* Results:
|
3891 |
* None.
|
3892 |
*
|
3893 |
* Side effects:
|
3894 |
* From now on there will be no more calls to the procedure given
|
3895 |
* in trace.
|
3896 |
*
|
3897 |
*----------------------------------------------------------------------
|
3898 |
*/
|
3899 |
|
3900 |
void
|
3901 |
Tcl_DeleteTrace(interp, trace)
|
3902 |
Tcl_Interp *interp; /* Interpreter that contains trace. */
|
3903 |
Tcl_Trace trace; /* Token for trace (returned previously by
|
3904 |
* Tcl_CreateTrace). */
|
3905 |
{
|
3906 |
register Interp *iPtr = (Interp *) interp;
|
3907 |
register Trace *tracePtr = (Trace *) trace;
|
3908 |
register Trace *tracePtr2;
|
3909 |
|
3910 |
if (iPtr->tracePtr == tracePtr) {
|
3911 |
iPtr->tracePtr = tracePtr->nextPtr;
|
3912 |
ckfree((char *) tracePtr);
|
3913 |
} else {
|
3914 |
for (tracePtr2 = iPtr->tracePtr; tracePtr2 != NULL;
|
3915 |
tracePtr2 = tracePtr2->nextPtr) {
|
3916 |
if (tracePtr2->nextPtr == tracePtr) {
|
3917 |
tracePtr2->nextPtr = tracePtr->nextPtr;
|
3918 |
ckfree((char *) tracePtr);
|
3919 |
break;
|
3920 |
}
|
3921 |
}
|
3922 |
}
|
3923 |
|
3924 |
if (iPtr->tracePtr == NULL) {
|
3925 |
/*
|
3926 |
* When compiling new code, allow commands to be compiled inline.
|
3927 |
*/
|
3928 |
|
3929 |
iPtr->flags &= ~DONT_COMPILE_CMDS_INLINE;
|
3930 |
}
|
3931 |
}
|
3932 |
|
3933 |
/*
|
3934 |
*----------------------------------------------------------------------
|
3935 |
*
|
3936 |
* Tcl_AddErrorInfo --
|
3937 |
*
|
3938 |
* Add information to the "errorInfo" variable that describes the
|
3939 |
* current error.
|
3940 |
*
|
3941 |
* Results:
|
3942 |
* None.
|
3943 |
*
|
3944 |
* Side effects:
|
3945 |
* The contents of message are added to the "errorInfo" variable.
|
3946 |
* If Tcl_Eval has been called since the current value of errorInfo
|
3947 |
* was set, errorInfo is cleared before adding the new message.
|
3948 |
* If we are just starting to log an error, errorInfo is initialized
|
3949 |
* from the error message in the interpreter's result.
|
3950 |
*
|
3951 |
*----------------------------------------------------------------------
|
3952 |
*/
|
3953 |
|
3954 |
void
|
3955 |
Tcl_AddErrorInfo(interp, message)
|
3956 |
Tcl_Interp *interp; /* Interpreter to which error information
|
3957 |
* pertains. */
|
3958 |
CONST char *message; /* Message to record. */
|
3959 |
{
|
3960 |
Tcl_AddObjErrorInfo(interp, message, -1);
|
3961 |
}
|
3962 |
|
3963 |
/*
|
3964 |
*----------------------------------------------------------------------
|
3965 |
*
|
3966 |
* Tcl_AddObjErrorInfo --
|
3967 |
*
|
3968 |
* Add information to the "errorInfo" variable that describes the
|
3969 |
* current error. This routine differs from Tcl_AddErrorInfo by
|
3970 |
* taking a byte pointer and length.
|
3971 |
*
|
3972 |
* Results:
|
3973 |
* None.
|
3974 |
*
|
3975 |
* Side effects:
|
3976 |
* "length" bytes from "message" are added to the "errorInfo" variable.
|
3977 |
* If "length" is negative, use bytes up to the first NULL byte.
|
3978 |
* If Tcl_EvalObj has been called since the current value of errorInfo
|
3979 |
* was set, errorInfo is cleared before adding the new message.
|
3980 |
* If we are just starting to log an error, errorInfo is initialized
|
3981 |
* from the error message in the interpreter's result.
|
3982 |
*
|
3983 |
*----------------------------------------------------------------------
|
3984 |
*/
|
3985 |
|
3986 |
void
|
3987 |
Tcl_AddObjErrorInfo(interp, message, length)
|
3988 |
Tcl_Interp *interp; /* Interpreter to which error information
|
3989 |
* pertains. */
|
3990 |
CONST char *message; /* Points to the first byte of an array of
|
3991 |
* bytes of the message. */
|
3992 |
int length; /* The number of bytes in the message.
|
3993 |
* If < 0, then append all bytes up to a
|
3994 |
* NULL byte. */
|
3995 |
{
|
3996 |
register Interp *iPtr = (Interp *) interp;
|
3997 |
Tcl_Obj *messagePtr;
|
3998 |
|
3999 |
/*
|
4000 |
* If we are just starting to log an error, errorInfo is initialized
|
4001 |
* from the error message in the interpreter's result.
|
4002 |
*/
|
4003 |
|
4004 |
if (!(iPtr->flags & ERR_IN_PROGRESS)) { /* just starting to log error */
|
4005 |
iPtr->flags |= ERR_IN_PROGRESS;
|
4006 |
|
4007 |
if (iPtr->result[0] == 0) {
|
4008 |
(void) Tcl_SetVar2Ex(interp, "errorInfo", NULL, iPtr->objResultPtr,
|
4009 |
TCL_GLOBAL_ONLY);
|
4010 |
} else { /* use the string result */
|
4011 |
Tcl_SetVar2(interp, "errorInfo", (char *) NULL, interp->result,
|
4012 |
TCL_GLOBAL_ONLY);
|
4013 |
}
|
4014 |
|
4015 |
/*
|
4016 |
* If the errorCode variable wasn't set by the code that generated
|
4017 |
* the error, set it to "NONE".
|
4018 |
*/
|
4019 |
|
4020 |
if (!(iPtr->flags & ERROR_CODE_SET)) {
|
4021 |
(void) Tcl_SetVar2(interp, "errorCode", (char *) NULL, "NONE",
|
4022 |
TCL_GLOBAL_ONLY);
|
4023 |
}
|
4024 |
}
|
4025 |
|
4026 |
/*
|
4027 |
* Now append "message" to the end of errorInfo.
|
4028 |
*/
|
4029 |
|
4030 |
if (length != 0) {
|
4031 |
messagePtr = Tcl_NewStringObj(message, length);
|
4032 |
Tcl_IncrRefCount(messagePtr);
|
4033 |
Tcl_SetVar2Ex(interp, "errorInfo", NULL, messagePtr,
|
4034 |
(TCL_GLOBAL_ONLY | TCL_APPEND_VALUE));
|
4035 |
Tcl_DecrRefCount(messagePtr); /* free msg object appended above */
|
4036 |
}
|
4037 |
}
|
4038 |
|
4039 |
/*
|
4040 |
*---------------------------------------------------------------------------
|
4041 |
*
|
4042 |
* Tcl_VarEvalVA --
|
4043 |
*
|
4044 |
* Given a variable number of string arguments, concatenate them
|
4045 |
* all together and execute the result as a Tcl command.
|
4046 |
*
|
4047 |
* Results:
|
4048 |
* A standard Tcl return result. An error message or other result may
|
4049 |
* be left in the interp's result.
|
4050 |
*
|
4051 |
* Side effects:
|
4052 |
* Depends on what was done by the command.
|
4053 |
*
|
4054 |
*---------------------------------------------------------------------------
|
4055 |
*/
|
4056 |
|
4057 |
int
|
4058 |
Tcl_VarEvalVA (interp, argList)
|
4059 |
Tcl_Interp *interp; /* Interpreter in which to evaluate command. */
|
4060 |
va_list argList; /* Variable argument list. */
|
4061 |
{
|
4062 |
Tcl_DString buf;
|
4063 |
char *string;
|
4064 |
int result;
|
4065 |
|
4066 |
/*
|
4067 |
* Copy the strings one after the other into a single larger
|
4068 |
* string. Use stack-allocated space for small commands, but if
|
4069 |
* the command gets too large than call ckalloc to create the
|
4070 |
* space.
|
4071 |
*/
|
4072 |
|
4073 |
Tcl_DStringInit(&buf);
|
4074 |
while (1) {
|
4075 |
string = va_arg(argList, char *);
|
4076 |
if (string == NULL) {
|
4077 |
break;
|
4078 |
}
|
4079 |
Tcl_DStringAppend(&buf, string, -1);
|
4080 |
}
|
4081 |
|
4082 |
result = Tcl_Eval(interp, Tcl_DStringValue(&buf));
|
4083 |
Tcl_DStringFree(&buf);
|
4084 |
return result;
|
4085 |
}
|
4086 |
|
4087 |
/*
|
4088 |
*----------------------------------------------------------------------
|
4089 |
*
|
4090 |
* Tcl_VarEval --
|
4091 |
*
|
4092 |
* Given a variable number of string arguments, concatenate them
|
4093 |
* all together and execute the result as a Tcl command.
|
4094 |
*
|
4095 |
* Results:
|
4096 |
* A standard Tcl return result. An error message or other
|
4097 |
* result may be left in interp->result.
|
4098 |
*
|
4099 |
* Side effects:
|
4100 |
* Depends on what was done by the command.
|
4101 |
*
|
4102 |
*----------------------------------------------------------------------
|
4103 |
*/
|
4104 |
/* VARARGS2 */ /* ARGSUSED */
|
4105 |
int
|
4106 |
Tcl_VarEval TCL_VARARGS_DEF(Tcl_Interp *,arg1)
|
4107 |
{
|
4108 |
Tcl_Interp *interp;
|
4109 |
va_list argList;
|
4110 |
int result;
|
4111 |
|
4112 |
interp = TCL_VARARGS_START(Tcl_Interp *,arg1,argList);
|
4113 |
result = Tcl_VarEvalVA(interp, argList);
|
4114 |
va_end(argList);
|
4115 |
|
4116 |
return result;
|
4117 |
}
|
4118 |
|
4119 |
/*
|
4120 |
*---------------------------------------------------------------------------
|
4121 |
*
|
4122 |
* Tcl_GlobalEval --
|
4123 |
*
|
4124 |
* Evaluate a command at global level in an interpreter.
|
4125 |
*
|
4126 |
* Results:
|
4127 |
* A standard Tcl result is returned, and the interp's result is
|
4128 |
* modified accordingly.
|
4129 |
*
|
4130 |
* Side effects:
|
4131 |
* The command string is executed in interp, and the execution
|
4132 |
* is carried out in the variable context of global level (no
|
4133 |
* procedures active), just as if an "uplevel #0" command were
|
4134 |
* being executed.
|
4135 |
*
|
4136 |
---------------------------------------------------------------------------
|
4137 |
*/
|
4138 |
|
4139 |
int
|
4140 |
Tcl_GlobalEval(interp, command)
|
4141 |
Tcl_Interp *interp; /* Interpreter in which to evaluate command. */
|
4142 |
char *command; /* Command to evaluate. */
|
4143 |
{
|
4144 |
register Interp *iPtr = (Interp *) interp;
|
4145 |
int result;
|
4146 |
CallFrame *savedVarFramePtr;
|
4147 |
|
4148 |
savedVarFramePtr = iPtr->varFramePtr;
|
4149 |
iPtr->varFramePtr = NULL;
|
4150 |
result = Tcl_Eval(interp, command);
|
4151 |
iPtr->varFramePtr = savedVarFramePtr;
|
4152 |
return result;
|
4153 |
}
|
4154 |
|
4155 |
/*
|
4156 |
*----------------------------------------------------------------------
|
4157 |
*
|
4158 |
* Tcl_SetRecursionLimit --
|
4159 |
*
|
4160 |
* Set the maximum number of recursive calls that may be active
|
4161 |
* for an interpreter at once.
|
4162 |
*
|
4163 |
* Results:
|
4164 |
* The return value is the old limit on nesting for interp.
|
4165 |
*
|
4166 |
* Side effects:
|
4167 |
* None.
|
4168 |
*
|
4169 |
*----------------------------------------------------------------------
|
4170 |
*/
|
4171 |
|
4172 |
int
|
4173 |
Tcl_SetRecursionLimit(interp, depth)
|
4174 |
Tcl_Interp *interp; /* Interpreter whose nesting limit
|
4175 |
* is to be set. */
|
4176 |
int depth; /* New value for maximimum depth. */
|
4177 |
{
|
4178 |
Interp *iPtr = (Interp *) interp;
|
4179 |
int old;
|
4180 |
|
4181 |
old = iPtr->maxNestingDepth;
|
4182 |
if (depth > 0) {
|
4183 |
iPtr->maxNestingDepth = depth;
|
4184 |
}
|
4185 |
return old;
|
4186 |
}
|
4187 |
|
4188 |
/*
|
4189 |
*----------------------------------------------------------------------
|
4190 |
*
|
4191 |
* Tcl_AllowExceptions --
|
4192 |
*
|
4193 |
* Sets a flag in an interpreter so that exceptions can occur
|
4194 |
* in the next call to Tcl_Eval without them being turned into
|
4195 |
* errors.
|
4196 |
*
|
4197 |
* Results:
|
4198 |
* None.
|
4199 |
*
|
4200 |
* Side effects:
|
4201 |
* The TCL_ALLOW_EXCEPTIONS flag gets set in the interpreter's
|
4202 |
* evalFlags structure. See the reference documentation for
|
4203 |
* more details.
|
4204 |
*
|
4205 |
*----------------------------------------------------------------------
|
4206 |
*/
|
4207 |
|
4208 |
void
|
4209 |
Tcl_AllowExceptions(interp)
|
4210 |
Tcl_Interp *interp; /* Interpreter in which to set flag. */
|
4211 |
{
|
4212 |
Interp *iPtr = (Interp *) interp;
|
4213 |
|
4214 |
iPtr->evalFlags |= TCL_ALLOW_EXCEPTIONS;
|
4215 |
}
|
4216 |
|
4217 |
|
4218 |
/*
|
4219 |
*----------------------------------------------------------------------
|
4220 |
*
|
4221 |
* Tcl_GetVersion
|
4222 |
*
|
4223 |
* Get the Tcl major, minor, and patchlevel version numbers and
|
4224 |
* the release type. A patch is a release type TCL_FINAL_RELEASE
|
4225 |
* with a patchLevel > 0.
|
4226 |
*
|
4227 |
* Results:
|
4228 |
* None.
|
4229 |
*
|
4230 |
* Side effects:
|
4231 |
* None.
|
4232 |
*
|
4233 |
*----------------------------------------------------------------------
|
4234 |
*/
|
4235 |
|
4236 |
void Tcl_GetVersion(majorV, minorV, patchLevelV, type)
|
4237 |
int *majorV;
|
4238 |
int *minorV;
|
4239 |
int *patchLevelV;
|
4240 |
int *type;
|
4241 |
{
|
4242 |
if (majorV != NULL) {
|
4243 |
*majorV = TCL_MAJOR_VERSION;
|
4244 |
}
|
4245 |
if (minorV != NULL) {
|
4246 |
*minorV = TCL_MINOR_VERSION;
|
4247 |
}
|
4248 |
if (patchLevelV != NULL) {
|
4249 |
*patchLevelV = TCL_RELEASE_SERIAL;
|
4250 |
}
|
4251 |
if (type != NULL) {
|
4252 |
*type = TCL_RELEASE_LEVEL;
|
4253 |
}
|
4254 |
}
|
4255 |
|
4256 |
/* End of tclbasic.c */
|