1 |
/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclscan.c,v 1.1.1.1 2001/06/13 04:46:00 dtashley Exp $ */
|
2 |
|
3 |
/*
|
4 |
* tclScan.c --
|
5 |
*
|
6 |
* This file contains the implementation of the "scan" command.
|
7 |
*
|
8 |
* Copyright (c) 1998 by Scriptics Corporation.
|
9 |
*
|
10 |
* See the file "license.terms" for information on usage and redistribution
|
11 |
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
12 |
*
|
13 |
* RCS: @(#) $Id: tclscan.c,v 1.1.1.1 2001/06/13 04:46:00 dtashley Exp $
|
14 |
*/
|
15 |
|
16 |
#include "tclInt.h"
|
17 |
|
18 |
/*
|
19 |
* Flag values used by Tcl_ScanObjCmd.
|
20 |
*/
|
21 |
|
22 |
#define SCAN_NOSKIP 0x1 /* Don't skip blanks. */
|
23 |
#define SCAN_SUPPRESS 0x2 /* Suppress assignment. */
|
24 |
#define SCAN_UNSIGNED 0x4 /* Read an unsigned value. */
|
25 |
#define SCAN_WIDTH 0x8 /* A width value was supplied. */
|
26 |
|
27 |
#define SCAN_SIGNOK 0x10 /* A +/- character is allowed. */
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28 |
#define SCAN_NODIGITS 0x20 /* No digits have been scanned. */
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29 |
#define SCAN_NOZERO 0x40 /* No zero digits have been scanned. */
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30 |
#define SCAN_XOK 0x80 /* An 'x' is allowed. */
|
31 |
#define SCAN_PTOK 0x100 /* Decimal point is allowed. */
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32 |
#define SCAN_EXPOK 0x200 /* An exponent is allowed. */
|
33 |
|
34 |
|
35 |
/*
|
36 |
* The following structure contains the information associated with
|
37 |
* a character set.
|
38 |
*/
|
39 |
|
40 |
typedef struct CharSet {
|
41 |
int exclude; /* 1 if this is an exclusion set. */
|
42 |
int nchars;
|
43 |
Tcl_UniChar *chars;
|
44 |
int nranges;
|
45 |
struct Range {
|
46 |
Tcl_UniChar start;
|
47 |
Tcl_UniChar end;
|
48 |
} *ranges;
|
49 |
} CharSet;
|
50 |
|
51 |
/*
|
52 |
* Declarations for functions used only in this file.
|
53 |
*/
|
54 |
|
55 |
static char * BuildCharSet _ANSI_ARGS_((CharSet *cset, char *format));
|
56 |
static int CharInSet _ANSI_ARGS_((CharSet *cset, int ch));
|
57 |
static void ReleaseCharSet _ANSI_ARGS_((CharSet *cset));
|
58 |
static int ValidateFormat _ANSI_ARGS_((Tcl_Interp *interp, char *format,
|
59 |
int numVars, int *totalVars));
|
60 |
|
61 |
/*
|
62 |
*----------------------------------------------------------------------
|
63 |
*
|
64 |
* BuildCharSet --
|
65 |
*
|
66 |
* This function examines a character set format specification
|
67 |
* and builds a CharSet containing the individual characters and
|
68 |
* character ranges specified.
|
69 |
*
|
70 |
* Results:
|
71 |
* Returns the next format position.
|
72 |
*
|
73 |
* Side effects:
|
74 |
* Initializes the charset.
|
75 |
*
|
76 |
*----------------------------------------------------------------------
|
77 |
*/
|
78 |
|
79 |
static char *
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80 |
BuildCharSet(cset, format)
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81 |
CharSet *cset;
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82 |
char *format; /* Points to first char of set. */
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83 |
{
|
84 |
Tcl_UniChar ch, start;
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85 |
int offset, nranges;
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86 |
char *end;
|
87 |
|
88 |
memset(cset, 0, sizeof(CharSet));
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89 |
|
90 |
offset = Tcl_UtfToUniChar(format, &ch);
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91 |
if (ch == '^') {
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92 |
cset->exclude = 1;
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93 |
format += offset;
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94 |
offset = Tcl_UtfToUniChar(format, &ch);
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95 |
}
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96 |
end = format + offset;
|
97 |
|
98 |
/*
|
99 |
* Find the close bracket so we can overallocate the set.
|
100 |
*/
|
101 |
|
102 |
if (ch == ']') {
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103 |
end += Tcl_UtfToUniChar(end, &ch);
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104 |
}
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105 |
nranges = 0;
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106 |
while (ch != ']') {
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107 |
if (ch == '-') {
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108 |
nranges++;
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109 |
}
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110 |
end += Tcl_UtfToUniChar(end, &ch);
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111 |
}
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112 |
|
113 |
cset->chars = (Tcl_UniChar *) ckalloc(sizeof(Tcl_UniChar)
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114 |
* (end - format - 1));
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115 |
if (nranges > 0) {
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116 |
cset->ranges = (struct Range *) ckalloc(sizeof(struct Range)*nranges);
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117 |
} else {
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118 |
cset->ranges = NULL;
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119 |
}
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120 |
|
121 |
/*
|
122 |
* Now build the character set.
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123 |
*/
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124 |
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125 |
cset->nchars = cset->nranges = 0;
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126 |
format += Tcl_UtfToUniChar(format, &ch);
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127 |
start = ch;
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128 |
if (ch == ']' || ch == '-') {
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129 |
cset->chars[cset->nchars++] = ch;
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130 |
format += Tcl_UtfToUniChar(format, &ch);
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131 |
}
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132 |
while (ch != ']') {
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133 |
if (*format == '-') {
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134 |
/*
|
135 |
* This may be the first character of a range, so don't add
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136 |
* it yet.
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137 |
*/
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138 |
|
139 |
start = ch;
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140 |
} else if (ch == '-') {
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141 |
/*
|
142 |
* Check to see if this is the last character in the set, in which
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143 |
* case it is not a range and we should add the previous character
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144 |
* as well as the dash.
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145 |
*/
|
146 |
|
147 |
if (*format == ']') {
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148 |
cset->chars[cset->nchars++] = start;
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149 |
cset->chars[cset->nchars++] = ch;
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150 |
} else {
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151 |
format += Tcl_UtfToUniChar(format, &ch);
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152 |
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153 |
/*
|
154 |
* Check to see if the range is in reverse order.
|
155 |
*/
|
156 |
|
157 |
if (start < ch) {
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158 |
cset->ranges[cset->nranges].start = start;
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159 |
cset->ranges[cset->nranges].end = ch;
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160 |
} else {
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161 |
cset->ranges[cset->nranges].start = ch;
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162 |
cset->ranges[cset->nranges].end = start;
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163 |
}
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164 |
cset->nranges++;
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165 |
}
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166 |
} else {
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167 |
cset->chars[cset->nchars++] = ch;
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168 |
}
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169 |
format += Tcl_UtfToUniChar(format, &ch);
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170 |
}
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171 |
return format;
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172 |
}
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173 |
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174 |
/*
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175 |
*----------------------------------------------------------------------
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176 |
*
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177 |
* CharInSet --
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*
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179 |
* Check to see if a character matches the given set.
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180 |
*
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181 |
* Results:
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182 |
* Returns non-zero if the character matches the given set.
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183 |
*
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184 |
* Side effects:
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185 |
* None.
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186 |
*
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187 |
*----------------------------------------------------------------------
|
188 |
*/
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189 |
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190 |
static int
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191 |
CharInSet(cset, c)
|
192 |
CharSet *cset;
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193 |
int c; /* Character to test, passed as int because
|
194 |
* of non-ANSI prototypes. */
|
195 |
{
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196 |
Tcl_UniChar ch = (Tcl_UniChar) c;
|
197 |
int i, match = 0;
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198 |
for (i = 0; i < cset->nchars; i++) {
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199 |
if (cset->chars[i] == ch) {
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200 |
match = 1;
|
201 |
break;
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202 |
}
|
203 |
}
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204 |
if (!match) {
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205 |
for (i = 0; i < cset->nranges; i++) {
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206 |
if ((cset->ranges[i].start <= ch)
|
207 |
&& (ch <= cset->ranges[i].end)) {
|
208 |
match = 1;
|
209 |
break;
|
210 |
}
|
211 |
}
|
212 |
}
|
213 |
return (cset->exclude ? !match : match);
|
214 |
}
|
215 |
|
216 |
/*
|
217 |
*----------------------------------------------------------------------
|
218 |
*
|
219 |
* ReleaseCharSet --
|
220 |
*
|
221 |
* Free the storage associated with a character set.
|
222 |
*
|
223 |
* Results:
|
224 |
* None.
|
225 |
*
|
226 |
* Side effects:
|
227 |
* None.
|
228 |
*
|
229 |
*----------------------------------------------------------------------
|
230 |
*/
|
231 |
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232 |
static void
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233 |
ReleaseCharSet(cset)
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234 |
CharSet *cset;
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235 |
{
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236 |
ckfree((char *)cset->chars);
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237 |
if (cset->ranges) {
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238 |
ckfree((char *)cset->ranges);
|
239 |
}
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240 |
}
|
241 |
|
242 |
/*
|
243 |
*----------------------------------------------------------------------
|
244 |
*
|
245 |
* ValidateFormat --
|
246 |
*
|
247 |
* Parse the format string and verify that it is properly formed
|
248 |
* and that there are exactly enough variables on the command line.
|
249 |
*
|
250 |
* Results:
|
251 |
* A standard Tcl result.
|
252 |
*
|
253 |
* Side effects:
|
254 |
* May place an error in the interpreter result.
|
255 |
*
|
256 |
*----------------------------------------------------------------------
|
257 |
*/
|
258 |
|
259 |
static int
|
260 |
ValidateFormat(interp, format, numVars, totalSubs)
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261 |
Tcl_Interp *interp; /* Current interpreter. */
|
262 |
char *format; /* The format string. */
|
263 |
int numVars; /* The number of variables passed to the
|
264 |
* scan command. */
|
265 |
int *totalSubs; /* The number of variables that will be
|
266 |
* required. */
|
267 |
{
|
268 |
#define STATIC_LIST_SIZE 16
|
269 |
int gotXpg, gotSequential, value, i, flags;
|
270 |
char *end;
|
271 |
Tcl_UniChar ch;
|
272 |
int staticAssign[STATIC_LIST_SIZE];
|
273 |
int *nassign = staticAssign;
|
274 |
int objIndex, xpgSize, nspace = STATIC_LIST_SIZE;
|
275 |
|
276 |
/*
|
277 |
* Initialize an array that records the number of times a variable
|
278 |
* is assigned to by the format string. We use this to detect if
|
279 |
* a variable is multiply assigned or left unassigned.
|
280 |
*/
|
281 |
|
282 |
if (numVars > nspace) {
|
283 |
nassign = (int*)ckalloc(sizeof(int) * numVars);
|
284 |
nspace = numVars;
|
285 |
}
|
286 |
for (i = 0; i < nspace; i++) {
|
287 |
nassign[i] = 0;
|
288 |
}
|
289 |
|
290 |
xpgSize = objIndex = gotXpg = gotSequential = 0;
|
291 |
|
292 |
while (*format != '\0') {
|
293 |
format += Tcl_UtfToUniChar(format, &ch);
|
294 |
|
295 |
flags = 0;
|
296 |
|
297 |
if (ch != '%') {
|
298 |
continue;
|
299 |
}
|
300 |
format += Tcl_UtfToUniChar(format, &ch);
|
301 |
if (ch == '%') {
|
302 |
continue;
|
303 |
}
|
304 |
if (ch == '*') {
|
305 |
flags |= SCAN_SUPPRESS;
|
306 |
format += Tcl_UtfToUniChar(format, &ch);
|
307 |
goto xpgCheckDone;
|
308 |
}
|
309 |
|
310 |
if ((ch < 0x80) && isdigit(UCHAR(ch))) { /* INTL: "C" locale. */
|
311 |
/*
|
312 |
* Check for an XPG3-style %n$ specification. Note: there
|
313 |
* must not be a mixture of XPG3 specs and non-XPG3 specs
|
314 |
* in the same format string.
|
315 |
*/
|
316 |
|
317 |
value = strtoul(format-1, &end, 10); /* INTL: "C" locale. */
|
318 |
if (*end != '$') {
|
319 |
goto notXpg;
|
320 |
}
|
321 |
format = end+1;
|
322 |
format += Tcl_UtfToUniChar(format, &ch);
|
323 |
gotXpg = 1;
|
324 |
if (gotSequential) {
|
325 |
goto mixedXPG;
|
326 |
}
|
327 |
objIndex = value - 1;
|
328 |
if ((objIndex < 0) || (numVars && (objIndex >= numVars))) {
|
329 |
goto badIndex;
|
330 |
} else if (numVars == 0) {
|
331 |
/*
|
332 |
* In the case where no vars are specified, the user can
|
333 |
* specify %9999$ legally, so we have to consider special
|
334 |
* rules for growing the assign array. 'value' is
|
335 |
* guaranteed to be > 0.
|
336 |
*/
|
337 |
xpgSize = (xpgSize > value) ? xpgSize : value;
|
338 |
}
|
339 |
goto xpgCheckDone;
|
340 |
}
|
341 |
|
342 |
notXpg:
|
343 |
gotSequential = 1;
|
344 |
if (gotXpg) {
|
345 |
mixedXPG:
|
346 |
Tcl_SetResult(interp,
|
347 |
"cannot mix \"%\" and \"%n$\" conversion specifiers",
|
348 |
TCL_STATIC);
|
349 |
goto error;
|
350 |
}
|
351 |
|
352 |
xpgCheckDone:
|
353 |
/*
|
354 |
* Parse any width specifier.
|
355 |
*/
|
356 |
|
357 |
if ((ch < 0x80) && isdigit(UCHAR(ch))) { /* INTL: "C" locale. */
|
358 |
value = strtoul(format-1, &format, 10); /* INTL: "C" locale. */
|
359 |
flags |= SCAN_WIDTH;
|
360 |
format += Tcl_UtfToUniChar(format, &ch);
|
361 |
}
|
362 |
|
363 |
/*
|
364 |
* Ignore size specifier.
|
365 |
*/
|
366 |
|
367 |
if ((ch == 'l') || (ch == 'L') || (ch == 'h')) {
|
368 |
format += Tcl_UtfToUniChar(format, &ch);
|
369 |
}
|
370 |
|
371 |
if (!(flags & SCAN_SUPPRESS) && numVars && (objIndex >= numVars)) {
|
372 |
goto badIndex;
|
373 |
}
|
374 |
|
375 |
/*
|
376 |
* Handle the various field types.
|
377 |
*/
|
378 |
|
379 |
switch (ch) {
|
380 |
case 'n':
|
381 |
case 'd':
|
382 |
case 'i':
|
383 |
case 'o':
|
384 |
case 'x':
|
385 |
case 'u':
|
386 |
case 'f':
|
387 |
case 'e':
|
388 |
case 'g':
|
389 |
case 's':
|
390 |
break;
|
391 |
case 'c':
|
392 |
if (flags & SCAN_WIDTH) {
|
393 |
Tcl_SetResult(interp, "field width may not be specified in %c conversion", TCL_STATIC);
|
394 |
goto error;
|
395 |
}
|
396 |
break;
|
397 |
case '[':
|
398 |
if (*format == '\0') {
|
399 |
goto badSet;
|
400 |
}
|
401 |
format += Tcl_UtfToUniChar(format, &ch);
|
402 |
if (ch == '^') {
|
403 |
if (*format == '\0') {
|
404 |
goto badSet;
|
405 |
}
|
406 |
format += Tcl_UtfToUniChar(format, &ch);
|
407 |
}
|
408 |
if (ch == ']') {
|
409 |
if (*format == '\0') {
|
410 |
goto badSet;
|
411 |
}
|
412 |
format += Tcl_UtfToUniChar(format, &ch);
|
413 |
}
|
414 |
while (ch != ']') {
|
415 |
if (*format == '\0') {
|
416 |
goto badSet;
|
417 |
}
|
418 |
format += Tcl_UtfToUniChar(format, &ch);
|
419 |
}
|
420 |
break;
|
421 |
badSet:
|
422 |
Tcl_SetResult(interp, "unmatched [ in format string",
|
423 |
TCL_STATIC);
|
424 |
goto error;
|
425 |
default:
|
426 |
{
|
427 |
char buf[TCL_UTF_MAX+1];
|
428 |
|
429 |
buf[Tcl_UniCharToUtf(ch, buf)] = '\0';
|
430 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
431 |
"bad scan conversion character \"", buf, "\"", NULL);
|
432 |
goto error;
|
433 |
}
|
434 |
}
|
435 |
if (!(flags & SCAN_SUPPRESS)) {
|
436 |
if (objIndex >= nspace) {
|
437 |
/*
|
438 |
* Expand the nassign buffer. If we are using XPG specifiers,
|
439 |
* make sure that we grow to a large enough size. xpgSize is
|
440 |
* guaranteed to be at least one larger than objIndex.
|
441 |
*/
|
442 |
value = nspace;
|
443 |
if (xpgSize) {
|
444 |
nspace = xpgSize;
|
445 |
} else {
|
446 |
nspace += STATIC_LIST_SIZE;
|
447 |
}
|
448 |
if (nassign == staticAssign) {
|
449 |
nassign = (void *)ckalloc(nspace * sizeof(int));
|
450 |
for (i = 0; i < STATIC_LIST_SIZE; ++i) {
|
451 |
nassign[i] = staticAssign[i];
|
452 |
}
|
453 |
} else {
|
454 |
nassign = (void *)ckrealloc((void *)nassign,
|
455 |
nspace * sizeof(int));
|
456 |
}
|
457 |
for (i = value; i < nspace; i++) {
|
458 |
nassign[i] = 0;
|
459 |
}
|
460 |
}
|
461 |
nassign[objIndex]++;
|
462 |
objIndex++;
|
463 |
}
|
464 |
}
|
465 |
|
466 |
/*
|
467 |
* Verify that all of the variable were assigned exactly once.
|
468 |
*/
|
469 |
|
470 |
if (numVars == 0) {
|
471 |
if (xpgSize) {
|
472 |
numVars = xpgSize;
|
473 |
} else {
|
474 |
numVars = objIndex;
|
475 |
}
|
476 |
}
|
477 |
if (totalSubs) {
|
478 |
*totalSubs = numVars;
|
479 |
}
|
480 |
for (i = 0; i < numVars; i++) {
|
481 |
if (nassign[i] > 1) {
|
482 |
Tcl_SetResult(interp, "variable is assigned by multiple \"%n$\" conversion specifiers", TCL_STATIC);
|
483 |
goto error;
|
484 |
} else if (!xpgSize && (nassign[i] == 0)) {
|
485 |
/*
|
486 |
* If the space is empty, and xpgSize is 0 (means XPG wasn't
|
487 |
* used, and/or numVars != 0), then too many vars were given
|
488 |
*/
|
489 |
Tcl_SetResult(interp, "variable is not assigned by any conversion specifiers", TCL_STATIC);
|
490 |
goto error;
|
491 |
}
|
492 |
}
|
493 |
|
494 |
if (nassign != staticAssign) {
|
495 |
ckfree((char *)nassign);
|
496 |
}
|
497 |
return TCL_OK;
|
498 |
|
499 |
badIndex:
|
500 |
if (gotXpg) {
|
501 |
Tcl_SetResult(interp, "\"%n$\" argument index out of range",
|
502 |
TCL_STATIC);
|
503 |
} else {
|
504 |
Tcl_SetResult(interp,
|
505 |
"different numbers of variable names and field specifiers",
|
506 |
TCL_STATIC);
|
507 |
}
|
508 |
|
509 |
error:
|
510 |
if (nassign != staticAssign) {
|
511 |
ckfree((char *)nassign);
|
512 |
}
|
513 |
return TCL_ERROR;
|
514 |
#undef STATIC_LIST_SIZE
|
515 |
}
|
516 |
|
517 |
/*
|
518 |
*----------------------------------------------------------------------
|
519 |
*
|
520 |
* Tcl_ScanObjCmd --
|
521 |
*
|
522 |
* This procedure is invoked to process the "scan" Tcl command.
|
523 |
* See the user documentation for details on what it does.
|
524 |
*
|
525 |
* Results:
|
526 |
* A standard Tcl result.
|
527 |
*
|
528 |
* Side effects:
|
529 |
* See the user documentation.
|
530 |
*
|
531 |
*----------------------------------------------------------------------
|
532 |
*/
|
533 |
|
534 |
/* ARGSUSED */
|
535 |
int
|
536 |
Tcl_ScanObjCmd(dummy, interp, objc, objv)
|
537 |
ClientData dummy; /* Not used. */
|
538 |
Tcl_Interp *interp; /* Current interpreter. */
|
539 |
int objc; /* Number of arguments. */
|
540 |
Tcl_Obj *CONST objv[]; /* Argument objects. */
|
541 |
{
|
542 |
char *format;
|
543 |
int numVars, nconversions, totalVars = -1;
|
544 |
int objIndex, offset, i, value, result, code;
|
545 |
char *string, *end, *baseString;
|
546 |
char op = 0;
|
547 |
int base = 0;
|
548 |
int underflow = 0;
|
549 |
size_t width;
|
550 |
long (*fn)() = NULL;
|
551 |
Tcl_UniChar ch, sch;
|
552 |
Tcl_Obj **objs = NULL, *objPtr = NULL;
|
553 |
int flags;
|
554 |
char buf[513]; /* Temporary buffer to hold scanned
|
555 |
* number strings before they are
|
556 |
* passed to strtoul. */
|
557 |
|
558 |
if (objc < 3) {
|
559 |
Tcl_WrongNumArgs(interp, 1, objv,
|
560 |
"string format ?varName varName ...?");
|
561 |
return TCL_ERROR;
|
562 |
}
|
563 |
|
564 |
format = Tcl_GetStringFromObj(objv[2], NULL);
|
565 |
numVars = objc-3;
|
566 |
|
567 |
/*
|
568 |
* Check for errors in the format string.
|
569 |
*/
|
570 |
|
571 |
if (ValidateFormat(interp, format, numVars, &totalVars) == TCL_ERROR) {
|
572 |
return TCL_ERROR;
|
573 |
}
|
574 |
|
575 |
/*
|
576 |
* Allocate space for the result objects.
|
577 |
*/
|
578 |
|
579 |
if (totalVars > 0) {
|
580 |
objs = (Tcl_Obj **) ckalloc(sizeof(Tcl_Obj*) * totalVars);
|
581 |
for (i = 0; i < totalVars; i++) {
|
582 |
objs[i] = NULL;
|
583 |
}
|
584 |
}
|
585 |
|
586 |
string = Tcl_GetStringFromObj(objv[1], NULL);
|
587 |
baseString = string;
|
588 |
|
589 |
/*
|
590 |
* Iterate over the format string filling in the result objects until
|
591 |
* we reach the end of input, the end of the format string, or there
|
592 |
* is a mismatch.
|
593 |
*/
|
594 |
|
595 |
objIndex = 0;
|
596 |
nconversions = 0;
|
597 |
while (*format != '\0') {
|
598 |
format += Tcl_UtfToUniChar(format, &ch);
|
599 |
|
600 |
flags = 0;
|
601 |
|
602 |
/*
|
603 |
* If we see whitespace in the format, skip whitespace in the string.
|
604 |
*/
|
605 |
|
606 |
if (Tcl_UniCharIsSpace(ch)) {
|
607 |
offset = Tcl_UtfToUniChar(string, &sch);
|
608 |
while (Tcl_UniCharIsSpace(sch)) {
|
609 |
if (*string == '\0') {
|
610 |
goto done;
|
611 |
}
|
612 |
string += offset;
|
613 |
offset = Tcl_UtfToUniChar(string, &sch);
|
614 |
}
|
615 |
continue;
|
616 |
}
|
617 |
|
618 |
if (ch != '%') {
|
619 |
literal:
|
620 |
if (*string == '\0') {
|
621 |
underflow = 1;
|
622 |
goto done;
|
623 |
}
|
624 |
string += Tcl_UtfToUniChar(string, &sch);
|
625 |
if (ch != sch) {
|
626 |
goto done;
|
627 |
}
|
628 |
continue;
|
629 |
}
|
630 |
|
631 |
format += Tcl_UtfToUniChar(format, &ch);
|
632 |
if (ch == '%') {
|
633 |
goto literal;
|
634 |
}
|
635 |
|
636 |
/*
|
637 |
* Check for assignment suppression ('*') or an XPG3-style
|
638 |
* assignment ('%n$').
|
639 |
*/
|
640 |
|
641 |
if (ch == '*') {
|
642 |
flags |= SCAN_SUPPRESS;
|
643 |
format += Tcl_UtfToUniChar(format, &ch);
|
644 |
} else if ((ch < 0x80) && isdigit(UCHAR(ch))) { /* INTL: "C" locale. */
|
645 |
value = strtoul(format-1, &end, 10); /* INTL: "C" locale. */
|
646 |
if (*end == '$') {
|
647 |
format = end+1;
|
648 |
format += Tcl_UtfToUniChar(format, &ch);
|
649 |
objIndex = value - 1;
|
650 |
}
|
651 |
}
|
652 |
|
653 |
/*
|
654 |
* Parse any width specifier.
|
655 |
*/
|
656 |
|
657 |
if ((ch < 0x80) && isdigit(UCHAR(ch))) { /* INTL: "C" locale. */
|
658 |
width = strtoul(format-1, &format, 10); /* INTL: "C" locale. */
|
659 |
format += Tcl_UtfToUniChar(format, &ch);
|
660 |
} else {
|
661 |
width = 0;
|
662 |
}
|
663 |
|
664 |
/*
|
665 |
* Ignore size specifier.
|
666 |
*/
|
667 |
|
668 |
if ((ch == 'l') || (ch == 'L') || (ch == 'h')) {
|
669 |
format += Tcl_UtfToUniChar(format, &ch);
|
670 |
}
|
671 |
|
672 |
/*
|
673 |
* Handle the various field types.
|
674 |
*/
|
675 |
|
676 |
switch (ch) {
|
677 |
case 'n':
|
678 |
if (!(flags & SCAN_SUPPRESS)) {
|
679 |
objPtr = Tcl_NewIntObj(string - baseString);
|
680 |
Tcl_IncrRefCount(objPtr);
|
681 |
objs[objIndex++] = objPtr;
|
682 |
}
|
683 |
nconversions++;
|
684 |
continue;
|
685 |
|
686 |
case 'd':
|
687 |
op = 'i';
|
688 |
base = 10;
|
689 |
fn = (long (*)())strtol;
|
690 |
break;
|
691 |
case 'i':
|
692 |
op = 'i';
|
693 |
base = 0;
|
694 |
fn = (long (*)())strtol;
|
695 |
break;
|
696 |
case 'o':
|
697 |
op = 'i';
|
698 |
base = 8;
|
699 |
fn = (long (*)())strtol;
|
700 |
break;
|
701 |
case 'x':
|
702 |
op = 'i';
|
703 |
base = 16;
|
704 |
fn = (long (*)())strtol;
|
705 |
break;
|
706 |
case 'u':
|
707 |
op = 'i';
|
708 |
base = 10;
|
709 |
flags |= SCAN_UNSIGNED;
|
710 |
fn = (long (*)())strtoul;
|
711 |
break;
|
712 |
|
713 |
case 'f':
|
714 |
case 'e':
|
715 |
case 'g':
|
716 |
op = 'f';
|
717 |
break;
|
718 |
|
719 |
case 's':
|
720 |
op = 's';
|
721 |
break;
|
722 |
|
723 |
case 'c':
|
724 |
op = 'c';
|
725 |
flags |= SCAN_NOSKIP;
|
726 |
break;
|
727 |
case '[':
|
728 |
op = '[';
|
729 |
flags |= SCAN_NOSKIP;
|
730 |
break;
|
731 |
}
|
732 |
|
733 |
/*
|
734 |
* At this point, we will need additional characters from the
|
735 |
* string to proceed.
|
736 |
*/
|
737 |
|
738 |
if (*string == '\0') {
|
739 |
underflow = 1;
|
740 |
goto done;
|
741 |
}
|
742 |
|
743 |
/*
|
744 |
* Skip any leading whitespace at the beginning of a field unless
|
745 |
* the format suppresses this behavior.
|
746 |
*/
|
747 |
|
748 |
if (!(flags & SCAN_NOSKIP)) {
|
749 |
while (*string != '\0') {
|
750 |
offset = Tcl_UtfToUniChar(string, &sch);
|
751 |
if (!Tcl_UniCharIsSpace(sch)) {
|
752 |
break;
|
753 |
}
|
754 |
string += offset;
|
755 |
}
|
756 |
if (*string == '\0') {
|
757 |
underflow = 1;
|
758 |
goto done;
|
759 |
}
|
760 |
}
|
761 |
|
762 |
/*
|
763 |
* Perform the requested scanning operation.
|
764 |
*/
|
765 |
|
766 |
switch (op) {
|
767 |
case 's':
|
768 |
/*
|
769 |
* Scan a string up to width characters or whitespace.
|
770 |
*/
|
771 |
|
772 |
if (width == 0) {
|
773 |
width = (size_t) ~0;
|
774 |
}
|
775 |
end = string;
|
776 |
while (*end != '\0') {
|
777 |
offset = Tcl_UtfToUniChar(end, &sch);
|
778 |
if (Tcl_UniCharIsSpace(sch)) {
|
779 |
break;
|
780 |
}
|
781 |
end += offset;
|
782 |
if (--width == 0) {
|
783 |
break;
|
784 |
}
|
785 |
}
|
786 |
if (!(flags & SCAN_SUPPRESS)) {
|
787 |
objPtr = Tcl_NewStringObj(string, end-string);
|
788 |
Tcl_IncrRefCount(objPtr);
|
789 |
objs[objIndex++] = objPtr;
|
790 |
}
|
791 |
string = end;
|
792 |
break;
|
793 |
|
794 |
case '[': {
|
795 |
CharSet cset;
|
796 |
|
797 |
if (width == 0) {
|
798 |
width = (size_t) ~0;
|
799 |
}
|
800 |
end = string;
|
801 |
|
802 |
format = BuildCharSet(&cset, format);
|
803 |
while (*end != '\0') {
|
804 |
offset = Tcl_UtfToUniChar(end, &sch);
|
805 |
if (!CharInSet(&cset, (int)sch)) {
|
806 |
break;
|
807 |
}
|
808 |
end += offset;
|
809 |
if (--width == 0) {
|
810 |
break;
|
811 |
}
|
812 |
}
|
813 |
ReleaseCharSet(&cset);
|
814 |
|
815 |
if (string == end) {
|
816 |
/*
|
817 |
* Nothing matched the range, stop processing
|
818 |
*/
|
819 |
goto done;
|
820 |
}
|
821 |
if (!(flags & SCAN_SUPPRESS)) {
|
822 |
objPtr = Tcl_NewStringObj(string, end-string);
|
823 |
Tcl_IncrRefCount(objPtr);
|
824 |
objs[objIndex++] = objPtr;
|
825 |
}
|
826 |
string = end;
|
827 |
|
828 |
break;
|
829 |
}
|
830 |
case 'c':
|
831 |
/*
|
832 |
* Scan a single Unicode character.
|
833 |
*/
|
834 |
|
835 |
string += Tcl_UtfToUniChar(string, &sch);
|
836 |
if (!(flags & SCAN_SUPPRESS)) {
|
837 |
objPtr = Tcl_NewIntObj((int)sch);
|
838 |
Tcl_IncrRefCount(objPtr);
|
839 |
objs[objIndex++] = objPtr;
|
840 |
}
|
841 |
break;
|
842 |
|
843 |
case 'i':
|
844 |
/*
|
845 |
* Scan an unsigned or signed integer.
|
846 |
*/
|
847 |
|
848 |
if ((width == 0) || (width > sizeof(buf) - 1)) {
|
849 |
width = sizeof(buf) - 1;
|
850 |
}
|
851 |
flags |= SCAN_SIGNOK | SCAN_NODIGITS | SCAN_NOZERO;
|
852 |
for (end = buf; width > 0; width--) {
|
853 |
switch (*string) {
|
854 |
/*
|
855 |
* The 0 digit has special meaning at the beginning of
|
856 |
* a number. If we are unsure of the base, it
|
857 |
* indicates that we are in base 8 or base 16 (if it is
|
858 |
* followed by an 'x').
|
859 |
*/
|
860 |
case '0':
|
861 |
if (base == 0) {
|
862 |
base = 8;
|
863 |
flags |= SCAN_XOK;
|
864 |
}
|
865 |
if (flags & SCAN_NOZERO) {
|
866 |
flags &= ~(SCAN_SIGNOK | SCAN_NODIGITS
|
867 |
| SCAN_NOZERO);
|
868 |
} else {
|
869 |
flags &= ~(SCAN_SIGNOK | SCAN_XOK
|
870 |
| SCAN_NODIGITS);
|
871 |
}
|
872 |
goto addToInt;
|
873 |
|
874 |
case '1': case '2': case '3': case '4':
|
875 |
case '5': case '6': case '7':
|
876 |
if (base == 0) {
|
877 |
base = 10;
|
878 |
}
|
879 |
flags &= ~(SCAN_SIGNOK | SCAN_XOK | SCAN_NODIGITS);
|
880 |
goto addToInt;
|
881 |
|
882 |
case '8': case '9':
|
883 |
if (base == 0) {
|
884 |
base = 10;
|
885 |
}
|
886 |
if (base <= 8) {
|
887 |
break;
|
888 |
}
|
889 |
flags &= ~(SCAN_SIGNOK | SCAN_XOK | SCAN_NODIGITS);
|
890 |
goto addToInt;
|
891 |
|
892 |
case 'A': case 'B': case 'C':
|
893 |
case 'D': case 'E': case 'F':
|
894 |
case 'a': case 'b': case 'c':
|
895 |
case 'd': case 'e': case 'f':
|
896 |
if (base <= 10) {
|
897 |
break;
|
898 |
}
|
899 |
flags &= ~(SCAN_SIGNOK | SCAN_XOK | SCAN_NODIGITS);
|
900 |
goto addToInt;
|
901 |
|
902 |
case '+': case '-':
|
903 |
if (flags & SCAN_SIGNOK) {
|
904 |
flags &= ~SCAN_SIGNOK;
|
905 |
goto addToInt;
|
906 |
}
|
907 |
break;
|
908 |
|
909 |
case 'x': case 'X':
|
910 |
if ((flags & SCAN_XOK) && (end == buf+1)) {
|
911 |
base = 16;
|
912 |
flags &= ~SCAN_XOK;
|
913 |
goto addToInt;
|
914 |
}
|
915 |
break;
|
916 |
}
|
917 |
|
918 |
/*
|
919 |
* We got an illegal character so we are done accumulating.
|
920 |
*/
|
921 |
|
922 |
break;
|
923 |
|
924 |
addToInt:
|
925 |
/*
|
926 |
* Add the character to the temporary buffer.
|
927 |
*/
|
928 |
|
929 |
*end++ = *string++;
|
930 |
if (*string == '\0') {
|
931 |
break;
|
932 |
}
|
933 |
}
|
934 |
|
935 |
/*
|
936 |
* Check to see if we need to back up because we only got a
|
937 |
* sign or a trailing x after a 0.
|
938 |
*/
|
939 |
|
940 |
if (flags & SCAN_NODIGITS) {
|
941 |
if (*string == '\0') {
|
942 |
underflow = 1;
|
943 |
}
|
944 |
goto done;
|
945 |
} else if (end[-1] == 'x' || end[-1] == 'X') {
|
946 |
end--;
|
947 |
string--;
|
948 |
}
|
949 |
|
950 |
|
951 |
/*
|
952 |
* Scan the value from the temporary buffer. If we are
|
953 |
* returning a large unsigned value, we have to convert it back
|
954 |
* to a string since Tcl only supports signed values.
|
955 |
*/
|
956 |
|
957 |
if (!(flags & SCAN_SUPPRESS)) {
|
958 |
*end = '\0';
|
959 |
value = (int) (*fn)(buf, NULL, base);
|
960 |
if ((flags & SCAN_UNSIGNED) && (value < 0)) {
|
961 |
sprintf(buf, "%u", value); /* INTL: ISO digit */
|
962 |
objPtr = Tcl_NewStringObj(buf, -1);
|
963 |
} else {
|
964 |
objPtr = Tcl_NewIntObj(value);
|
965 |
}
|
966 |
Tcl_IncrRefCount(objPtr);
|
967 |
objs[objIndex++] = objPtr;
|
968 |
}
|
969 |
|
970 |
break;
|
971 |
|
972 |
case 'f':
|
973 |
/*
|
974 |
* Scan a floating point number
|
975 |
*/
|
976 |
|
977 |
if ((width == 0) || (width > sizeof(buf) - 1)) {
|
978 |
width = sizeof(buf) - 1;
|
979 |
}
|
980 |
flags |= SCAN_SIGNOK | SCAN_NODIGITS | SCAN_PTOK | SCAN_EXPOK;
|
981 |
for (end = buf; width > 0; width--) {
|
982 |
switch (*string) {
|
983 |
case '0': case '1': case '2': case '3':
|
984 |
case '4': case '5': case '6': case '7':
|
985 |
case '8': case '9':
|
986 |
flags &= ~(SCAN_SIGNOK | SCAN_NODIGITS);
|
987 |
goto addToFloat;
|
988 |
case '+': case '-':
|
989 |
if (flags & SCAN_SIGNOK) {
|
990 |
flags &= ~SCAN_SIGNOK;
|
991 |
goto addToFloat;
|
992 |
}
|
993 |
break;
|
994 |
case '.':
|
995 |
if (flags & SCAN_PTOK) {
|
996 |
flags &= ~(SCAN_SIGNOK | SCAN_PTOK);
|
997 |
goto addToFloat;
|
998 |
}
|
999 |
break;
|
1000 |
case 'e': case 'E':
|
1001 |
/*
|
1002 |
* An exponent is not allowed until there has
|
1003 |
* been at least one digit.
|
1004 |
*/
|
1005 |
|
1006 |
if ((flags & (SCAN_NODIGITS | SCAN_EXPOK))
|
1007 |
== SCAN_EXPOK) {
|
1008 |
flags = (flags & ~(SCAN_EXPOK|SCAN_PTOK))
|
1009 |
| SCAN_SIGNOK | SCAN_NODIGITS;
|
1010 |
goto addToFloat;
|
1011 |
}
|
1012 |
break;
|
1013 |
}
|
1014 |
|
1015 |
/*
|
1016 |
* We got an illegal character so we are done accumulating.
|
1017 |
*/
|
1018 |
|
1019 |
break;
|
1020 |
|
1021 |
addToFloat:
|
1022 |
/*
|
1023 |
* Add the character to the temporary buffer.
|
1024 |
*/
|
1025 |
|
1026 |
*end++ = *string++;
|
1027 |
if (*string == '\0') {
|
1028 |
break;
|
1029 |
}
|
1030 |
}
|
1031 |
|
1032 |
/*
|
1033 |
* Check to see if we need to back up because we saw a
|
1034 |
* trailing 'e' or sign.
|
1035 |
*/
|
1036 |
|
1037 |
if (flags & SCAN_NODIGITS) {
|
1038 |
if (flags & SCAN_EXPOK) {
|
1039 |
/*
|
1040 |
* There were no digits at all so scanning has
|
1041 |
* failed and we are done.
|
1042 |
*/
|
1043 |
if (*string == '\0') {
|
1044 |
underflow = 1;
|
1045 |
}
|
1046 |
goto done;
|
1047 |
}
|
1048 |
|
1049 |
/*
|
1050 |
* We got a bad exponent ('e' and maybe a sign).
|
1051 |
*/
|
1052 |
|
1053 |
end--;
|
1054 |
string--;
|
1055 |
if (*end != 'e' && *end != 'E') {
|
1056 |
end--;
|
1057 |
string--;
|
1058 |
}
|
1059 |
}
|
1060 |
|
1061 |
/*
|
1062 |
* Scan the value from the temporary buffer.
|
1063 |
*/
|
1064 |
|
1065 |
if (!(flags & SCAN_SUPPRESS)) {
|
1066 |
double dvalue;
|
1067 |
*end = '\0';
|
1068 |
dvalue = strtod(buf, NULL);
|
1069 |
objPtr = Tcl_NewDoubleObj(dvalue);
|
1070 |
Tcl_IncrRefCount(objPtr);
|
1071 |
objs[objIndex++] = objPtr;
|
1072 |
}
|
1073 |
break;
|
1074 |
}
|
1075 |
nconversions++;
|
1076 |
}
|
1077 |
|
1078 |
done:
|
1079 |
result = 0;
|
1080 |
code = TCL_OK;
|
1081 |
|
1082 |
if (numVars) {
|
1083 |
/*
|
1084 |
* In this case, variables were specified (classic scan)
|
1085 |
*/
|
1086 |
for (i = 0; i < totalVars; i++) {
|
1087 |
if (objs[i] != NULL) {
|
1088 |
result++;
|
1089 |
if (Tcl_ObjSetVar2(interp, objv[i+3], NULL,
|
1090 |
objs[i], 0) == NULL) {
|
1091 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
|
1092 |
"couldn't set variable \"",
|
1093 |
Tcl_GetString(objv[i+3]), "\"", (char *) NULL);
|
1094 |
code = TCL_ERROR;
|
1095 |
}
|
1096 |
Tcl_DecrRefCount(objs[i]);
|
1097 |
}
|
1098 |
}
|
1099 |
} else {
|
1100 |
/*
|
1101 |
* Here no vars were specified, we want a list returned (inline scan)
|
1102 |
*/
|
1103 |
objPtr = Tcl_NewObj();
|
1104 |
for (i = 0; i < totalVars; i++) {
|
1105 |
if (objs[i] != NULL) {
|
1106 |
Tcl_ListObjAppendElement(NULL, objPtr, objs[i]);
|
1107 |
Tcl_DecrRefCount(objs[i]);
|
1108 |
} else {
|
1109 |
/*
|
1110 |
* More %-specifiers than matching chars, so we
|
1111 |
* just spit out empty strings for these
|
1112 |
*/
|
1113 |
Tcl_ListObjAppendElement(NULL, objPtr, Tcl_NewObj());
|
1114 |
}
|
1115 |
}
|
1116 |
}
|
1117 |
ckfree((char*) objs);
|
1118 |
if (code == TCL_OK) {
|
1119 |
if (underflow && (nconversions == 0)) {
|
1120 |
if (numVars) {
|
1121 |
objPtr = Tcl_NewIntObj(-1);
|
1122 |
} else {
|
1123 |
if (objPtr) {
|
1124 |
Tcl_SetListObj(objPtr, 0, NULL);
|
1125 |
} else {
|
1126 |
objPtr = Tcl_NewObj();
|
1127 |
}
|
1128 |
}
|
1129 |
} else if (numVars) {
|
1130 |
objPtr = Tcl_NewIntObj(result);
|
1131 |
}
|
1132 |
Tcl_SetObjResult(interp, objPtr);
|
1133 |
}
|
1134 |
return code;
|
1135 |
}
|
1136 |
|
1137 |
|
1138 |
/* $History: tclscan.c $
|
1139 |
*
|
1140 |
* ***************** Version 1 *****************
|
1141 |
* User: Dtashley Date: 1/02/01 Time: 1:03a
|
1142 |
* Created in $/IjuScripter, IjuConsole/Source/Tcl Base
|
1143 |
* Initial check-in.
|
1144 |
*/
|
1145 |
|
1146 |
/* End of TCLSCAN.C */ |