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dashley |
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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tcl_base/tclcompcmds.c,v 1.1.1.1 2001/06/13 04:35:34 dtashley Exp $ */
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/*
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* tclCompCmds.c --
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*
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* This file contains compilation procedures that compile various
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* Tcl commands into a sequence of instructions ("bytecodes").
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*
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* Copyright (c) 1997-1998 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tclcompcmds.c,v 1.1.1.1 2001/06/13 04:35:34 dtashley Exp $
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*/
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#include "tclInt.h"
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#include "tclCompile.h"
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/*
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* Prototypes for procedures defined later in this file:
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*/
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static ClientData DupForeachInfo _ANSI_ARGS_((ClientData clientData));
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static void FreeForeachInfo _ANSI_ARGS_((
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ClientData clientData));
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/*
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* The structures below define the AuxData types defined in this file.
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*/
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AuxDataType tclForeachInfoType = {
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"ForeachInfo", /* name */
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DupForeachInfo, /* dupProc */
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FreeForeachInfo /* freeProc */
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};
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/*
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*----------------------------------------------------------------------
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*
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* TclCompileBreakCmd --
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*
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* Procedure called to compile the "break" command.
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*
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* Results:
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* The return value is a standard Tcl result, which is TCL_OK unless
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* there was an error during compilation. If an error occurs then
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* the interpreter's result contains a standard error message.
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*
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50 |
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* envPtr->maxStackDepth is updated with the maximum number of stack
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* elements needed to execute the command.
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*
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* Side effects:
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* Instructions are added to envPtr to execute the "break" command
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* at runtime.
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*
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*----------------------------------------------------------------------
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*/
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int
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TclCompileBreakCmd(interp, parsePtr, envPtr)
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Tcl_Interp *interp; /* Used for error reporting. */
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Tcl_Parse *parsePtr; /* Points to a parse structure for the
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* command created by Tcl_ParseCommand. */
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CompileEnv *envPtr; /* Holds resulting instructions. */
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{
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if (parsePtr->numWords != 1) {
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Tcl_ResetResult(interp);
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Tcl_AppendToObj(Tcl_GetObjResult(interp),
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"wrong # args: should be \"break\"", -1);
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envPtr->maxStackDepth = 0;
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return TCL_ERROR;
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}
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/*
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* Emit a break instruction.
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*/
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TclEmitOpcode(INST_BREAK, envPtr);
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envPtr->maxStackDepth = 0;
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return TCL_OK;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TclCompileCatchCmd --
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*
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* Procedure called to compile the "catch" command.
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*
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* Results:
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* The return value is a standard Tcl result, which is TCL_OK if
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* compilation was successful. If an error occurs then the
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* interpreter's result contains a standard error message and TCL_ERROR
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* is returned. If the command is too complex for TclCompileCatchCmd,
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* TCL_OUT_LINE_COMPILE is returned indicating that the catch command
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* should be compiled "out of line" by emitting code to invoke its
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* command procedure at runtime.
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*
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* envPtr->maxStackDepth is updated with the maximum number of stack
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* elements needed to execute the command.
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*
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* Side effects:
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* Instructions are added to envPtr to execute the "catch" command
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* at runtime.
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*
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107 |
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*----------------------------------------------------------------------
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108 |
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*/
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109 |
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110 |
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int
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111 |
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TclCompileCatchCmd(interp, parsePtr, envPtr)
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Tcl_Interp *interp; /* Used for error reporting. */
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113 |
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Tcl_Parse *parsePtr; /* Points to a parse structure for the
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114 |
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* command created by Tcl_ParseCommand. */
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115 |
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CompileEnv *envPtr; /* Holds resulting instructions. */
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{
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117 |
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JumpFixup jumpFixup;
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Tcl_Token *cmdTokenPtr, *nameTokenPtr;
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char *name;
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120 |
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int localIndex, nameChars, range, maxDepth, startOffset, jumpDist;
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int code;
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char buffer[32 + TCL_INTEGER_SPACE];
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124 |
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envPtr->maxStackDepth = 0;
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if ((parsePtr->numWords != 2) && (parsePtr->numWords != 3)) {
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Tcl_ResetResult(interp);
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127 |
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Tcl_AppendToObj(Tcl_GetObjResult(interp),
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"wrong # args: should be \"catch command ?varName?\"", -1);
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return TCL_ERROR;
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130 |
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}
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131 |
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132 |
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/*
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133 |
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* If a variable was specified and the catch command is at global level
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* (not in a procedure), don't compile it inline: the payoff is
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135 |
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* too small.
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136 |
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*/
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137 |
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138 |
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if ((parsePtr->numWords == 3) && (envPtr->procPtr == NULL)) {
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139 |
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return TCL_OUT_LINE_COMPILE;
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140 |
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}
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141 |
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142 |
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/*
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143 |
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* Make sure the variable name, if any, has no substitutions and just
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144 |
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* refers to a local scaler.
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145 |
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*/
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146 |
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147 |
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localIndex = -1;
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148 |
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cmdTokenPtr = parsePtr->tokenPtr
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+ (parsePtr->tokenPtr->numComponents + 1);
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150 |
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if (parsePtr->numWords == 3) {
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151 |
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nameTokenPtr = cmdTokenPtr + (cmdTokenPtr->numComponents + 1);
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152 |
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if (nameTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
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153 |
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name = nameTokenPtr[1].start;
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154 |
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nameChars = nameTokenPtr[1].size;
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155 |
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if (!TclIsLocalScalar(name, nameChars)) {
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156 |
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return TCL_OUT_LINE_COMPILE;
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157 |
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}
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158 |
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localIndex = TclFindCompiledLocal(nameTokenPtr[1].start,
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nameTokenPtr[1].size, /*create*/ 1,
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/*flags*/ VAR_SCALAR, envPtr->procPtr);
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} else {
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162 |
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return TCL_OUT_LINE_COMPILE;
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}
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164 |
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}
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165 |
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/*
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* We will compile the catch command. Emit a beginCatch instruction at
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168 |
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* the start of the catch body: the subcommand it controls.
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169 |
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*/
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170 |
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171 |
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maxDepth = 0;
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172 |
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173 |
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envPtr->exceptDepth++;
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envPtr->maxExceptDepth =
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TclMax(envPtr->exceptDepth, envPtr->maxExceptDepth);
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range = TclCreateExceptRange(CATCH_EXCEPTION_RANGE, envPtr);
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TclEmitInstInt4(INST_BEGIN_CATCH4, range, envPtr);
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startOffset = (envPtr->codeNext - envPtr->codeStart);
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envPtr->exceptArrayPtr[range].codeOffset = startOffset;
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code = TclCompileCmdWord(interp, cmdTokenPtr+1,
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cmdTokenPtr->numComponents, envPtr);
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if (code != TCL_OK) {
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if (code == TCL_ERROR) {
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sprintf(buffer, "\n (\"catch\" body line %d)",
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interp->errorLine);
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Tcl_AddObjErrorInfo(interp, buffer, -1);
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}
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goto done;
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190 |
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}
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191 |
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maxDepth = envPtr->maxStackDepth;
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192 |
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envPtr->exceptArrayPtr[range].numCodeBytes =
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193 |
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(envPtr->codeNext - envPtr->codeStart) - startOffset;
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194 |
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195 |
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/*
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196 |
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* The "no errors" epilogue code: store the body's result into the
|
197 |
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* variable (if any), push "0" (TCL_OK) as the catch's "no error"
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198 |
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* result, and jump around the "error case" code.
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199 |
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*/
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200 |
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201 |
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if (localIndex != -1) {
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202 |
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if (localIndex <= 255) {
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203 |
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TclEmitInstInt1(INST_STORE_SCALAR1, localIndex, envPtr);
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204 |
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} else {
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205 |
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TclEmitInstInt4(INST_STORE_SCALAR4, localIndex, envPtr);
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206 |
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}
|
207 |
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}
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208 |
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TclEmitOpcode(INST_POP, envPtr);
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209 |
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TclEmitPush(TclRegisterLiteral(envPtr, "0", 1, /*onHeap*/ 0),
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210 |
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envPtr);
|
211 |
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if (maxDepth == 0) {
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212 |
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maxDepth = 1;
|
213 |
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}
|
214 |
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TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, &jumpFixup);
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215 |
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|
216 |
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/*
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217 |
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* The "error case" code: store the body's result into the variable (if
|
218 |
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* any), then push the error result code. The initial PC offset here is
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219 |
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* the catch's error target.
|
220 |
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*/
|
221 |
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|
222 |
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envPtr->exceptArrayPtr[range].catchOffset =
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223 |
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(envPtr->codeNext - envPtr->codeStart);
|
224 |
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if (localIndex != -1) {
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225 |
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TclEmitOpcode(INST_PUSH_RESULT, envPtr);
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226 |
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if (localIndex <= 255) {
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227 |
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TclEmitInstInt1(INST_STORE_SCALAR1, localIndex, envPtr);
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228 |
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} else {
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229 |
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TclEmitInstInt4(INST_STORE_SCALAR4, localIndex, envPtr);
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230 |
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}
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231 |
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TclEmitOpcode(INST_POP, envPtr);
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232 |
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}
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233 |
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TclEmitOpcode(INST_PUSH_RETURN_CODE, envPtr);
|
234 |
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|
235 |
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/*
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236 |
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* Update the target of the jump after the "no errors" code, then emit
|
237 |
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* an endCatch instruction at the end of the catch command.
|
238 |
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*/
|
239 |
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|
240 |
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jumpDist = (envPtr->codeNext - envPtr->codeStart)
|
241 |
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- jumpFixup.codeOffset;
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242 |
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if (TclFixupForwardJump(envPtr, &jumpFixup, jumpDist, 127)) {
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243 |
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panic("TclCompileCatchCmd: bad jump distance %d\n", jumpDist);
|
244 |
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}
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245 |
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TclEmitOpcode(INST_END_CATCH, envPtr);
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246 |
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|
247 |
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done:
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248 |
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envPtr->exceptDepth--;
|
249 |
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envPtr->maxStackDepth = maxDepth;
|
250 |
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return code;
|
251 |
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}
|
252 |
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|
253 |
|
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/*
|
254 |
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*----------------------------------------------------------------------
|
255 |
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*
|
256 |
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* TclCompileContinueCmd --
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257 |
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*
|
258 |
|
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* Procedure called to compile the "continue" command.
|
259 |
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*
|
260 |
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* Results:
|
261 |
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* The return value is a standard Tcl result, which is TCL_OK unless
|
262 |
|
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* there was an error while parsing string. If an error occurs then
|
263 |
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* the interpreter's result contains a standard error message.
|
264 |
|
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*
|
265 |
|
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* envPtr->maxStackDepth is updated with the maximum number of stack
|
266 |
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* elements needed to execute the command.
|
267 |
|
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*
|
268 |
|
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* Side effects:
|
269 |
|
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* Instructions are added to envPtr to execute the "continue" command
|
270 |
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* at runtime.
|
271 |
|
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*
|
272 |
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*----------------------------------------------------------------------
|
273 |
|
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*/
|
274 |
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|
275 |
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int
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276 |
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TclCompileContinueCmd(interp, parsePtr, envPtr)
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277 |
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Tcl_Interp *interp; /* Used for error reporting. */
|
278 |
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Tcl_Parse *parsePtr; /* Points to a parse structure for the
|
279 |
|
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* command created by Tcl_ParseCommand. */
|
280 |
|
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CompileEnv *envPtr; /* Holds resulting instructions. */
|
281 |
|
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{
|
282 |
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/*
|
283 |
|
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* There should be no argument after the "continue".
|
284 |
|
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*/
|
285 |
|
|
|
286 |
|
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if (parsePtr->numWords != 1) {
|
287 |
|
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Tcl_ResetResult(interp);
|
288 |
|
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Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
289 |
|
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"wrong # args: should be \"continue\"", -1);
|
290 |
|
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envPtr->maxStackDepth = 0;
|
291 |
|
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return TCL_ERROR;
|
292 |
|
|
}
|
293 |
|
|
|
294 |
|
|
/*
|
295 |
|
|
* Emit a continue instruction.
|
296 |
|
|
*/
|
297 |
|
|
|
298 |
|
|
TclEmitOpcode(INST_CONTINUE, envPtr);
|
299 |
|
|
envPtr->maxStackDepth = 0;
|
300 |
|
|
return TCL_OK;
|
301 |
|
|
}
|
302 |
|
|
|
303 |
|
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/*
|
304 |
|
|
*----------------------------------------------------------------------
|
305 |
|
|
*
|
306 |
|
|
* TclCompileExprCmd --
|
307 |
|
|
*
|
308 |
|
|
* Procedure called to compile the "expr" command.
|
309 |
|
|
*
|
310 |
|
|
* Results:
|
311 |
|
|
* The return value is a standard Tcl result, which is TCL_OK
|
312 |
|
|
* unless there was an error while parsing string. If an error occurs
|
313 |
|
|
* then the interpreter's result contains a standard error message.
|
314 |
|
|
*
|
315 |
|
|
* envPtr->maxStackDepth is updated with the maximum number of stack
|
316 |
|
|
* elements needed to execute the "expr" command.
|
317 |
|
|
*
|
318 |
|
|
* Side effects:
|
319 |
|
|
* Instructions are added to envPtr to execute the "expr" command
|
320 |
|
|
* at runtime.
|
321 |
|
|
*
|
322 |
|
|
*----------------------------------------------------------------------
|
323 |
|
|
*/
|
324 |
|
|
|
325 |
|
|
int
|
326 |
|
|
TclCompileExprCmd(interp, parsePtr, envPtr)
|
327 |
|
|
Tcl_Interp *interp; /* Used for error reporting. */
|
328 |
|
|
Tcl_Parse *parsePtr; /* Points to a parse structure for the
|
329 |
|
|
* command created by Tcl_ParseCommand. */
|
330 |
|
|
CompileEnv *envPtr; /* Holds resulting instructions. */
|
331 |
|
|
{
|
332 |
|
|
Tcl_Token *firstWordPtr;
|
333 |
|
|
|
334 |
|
|
envPtr->maxStackDepth = 0;
|
335 |
|
|
if (parsePtr->numWords == 1) {
|
336 |
|
|
Tcl_ResetResult(interp);
|
337 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
338 |
|
|
"wrong # args: should be \"expr arg ?arg ...?\"", -1);
|
339 |
|
|
return TCL_ERROR;
|
340 |
|
|
}
|
341 |
|
|
|
342 |
|
|
firstWordPtr = parsePtr->tokenPtr
|
343 |
|
|
+ (parsePtr->tokenPtr->numComponents + 1);
|
344 |
|
|
return TclCompileExprWords(interp, firstWordPtr, (parsePtr->numWords-1),
|
345 |
|
|
envPtr);
|
346 |
|
|
}
|
347 |
|
|
|
348 |
|
|
/*
|
349 |
|
|
*----------------------------------------------------------------------
|
350 |
|
|
*
|
351 |
|
|
* TclCompileForCmd --
|
352 |
|
|
*
|
353 |
|
|
* Procedure called to compile the "for" command.
|
354 |
|
|
*
|
355 |
|
|
* Results:
|
356 |
|
|
* The return value is a standard Tcl result, which is TCL_OK unless
|
357 |
|
|
* there was an error while parsing string. If an error occurs then
|
358 |
|
|
* the interpreter's result contains a standard error message.
|
359 |
|
|
*
|
360 |
|
|
* envPtr->maxStackDepth is updated with the maximum number of stack
|
361 |
|
|
* elements needed to execute the command.
|
362 |
|
|
*
|
363 |
|
|
* Side effects:
|
364 |
|
|
* Instructions are added to envPtr to execute the "for" command
|
365 |
|
|
* at runtime.
|
366 |
|
|
*
|
367 |
|
|
*----------------------------------------------------------------------
|
368 |
|
|
*/
|
369 |
|
|
|
370 |
|
|
int
|
371 |
|
|
TclCompileForCmd(interp, parsePtr, envPtr)
|
372 |
|
|
Tcl_Interp *interp; /* Used for error reporting. */
|
373 |
|
|
Tcl_Parse *parsePtr; /* Points to a parse structure for the
|
374 |
|
|
* command created by Tcl_ParseCommand. */
|
375 |
|
|
CompileEnv *envPtr; /* Holds resulting instructions. */
|
376 |
|
|
{
|
377 |
|
|
Tcl_Token *startTokenPtr, *testTokenPtr, *nextTokenPtr, *bodyTokenPtr;
|
378 |
|
|
JumpFixup jumpFalseFixup;
|
379 |
|
|
int maxDepth, jumpBackDist, jumpBackOffset, testCodeOffset, jumpDist;
|
380 |
|
|
int bodyRange, nextRange, code;
|
381 |
|
|
unsigned char *jumpPc;
|
382 |
|
|
char buffer[32 + TCL_INTEGER_SPACE];
|
383 |
|
|
|
384 |
|
|
envPtr->maxStackDepth = 0;
|
385 |
|
|
if (parsePtr->numWords != 5) {
|
386 |
|
|
Tcl_ResetResult(interp);
|
387 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
388 |
|
|
"wrong # args: should be \"for start test next command\"", -1);
|
389 |
|
|
return TCL_ERROR;
|
390 |
|
|
}
|
391 |
|
|
|
392 |
|
|
/*
|
393 |
|
|
* If the test expression requires substitutions, don't compile the for
|
394 |
|
|
* command inline. E.g., the expression might cause the loop to never
|
395 |
|
|
* execute or execute forever, as in "for {} "$x > 5" {incr x} {}".
|
396 |
|
|
*/
|
397 |
|
|
|
398 |
|
|
startTokenPtr = parsePtr->tokenPtr
|
399 |
|
|
+ (parsePtr->tokenPtr->numComponents + 1);
|
400 |
|
|
testTokenPtr = startTokenPtr + (startTokenPtr->numComponents + 1);
|
401 |
|
|
if (testTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
|
402 |
|
|
return TCL_OUT_LINE_COMPILE;
|
403 |
|
|
}
|
404 |
|
|
|
405 |
|
|
/*
|
406 |
|
|
* Create ExceptionRange records for the body and the "next" command.
|
407 |
|
|
* The "next" command's ExceptionRange supports break but not continue
|
408 |
|
|
* (and has a -1 continueOffset).
|
409 |
|
|
*/
|
410 |
|
|
|
411 |
|
|
envPtr->exceptDepth++;
|
412 |
|
|
envPtr->maxExceptDepth =
|
413 |
|
|
TclMax(envPtr->exceptDepth, envPtr->maxExceptDepth);
|
414 |
|
|
bodyRange = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr);
|
415 |
|
|
nextRange = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr);
|
416 |
|
|
|
417 |
|
|
/*
|
418 |
|
|
* Inline compile the initial command.
|
419 |
|
|
*/
|
420 |
|
|
|
421 |
|
|
maxDepth = 0;
|
422 |
|
|
code = TclCompileCmdWord(interp, startTokenPtr+1,
|
423 |
|
|
startTokenPtr->numComponents, envPtr);
|
424 |
|
|
if (code != TCL_OK) {
|
425 |
|
|
if (code == TCL_ERROR) {
|
426 |
|
|
Tcl_AddObjErrorInfo(interp,
|
427 |
|
|
"\n (\"for\" initial command)", -1);
|
428 |
|
|
}
|
429 |
|
|
goto done;
|
430 |
|
|
}
|
431 |
|
|
maxDepth = envPtr->maxStackDepth;
|
432 |
|
|
TclEmitOpcode(INST_POP, envPtr);
|
433 |
|
|
|
434 |
|
|
/*
|
435 |
|
|
* Compile the test then emit the conditional jump that exits the for.
|
436 |
|
|
*/
|
437 |
|
|
|
438 |
|
|
testCodeOffset = (envPtr->codeNext - envPtr->codeStart);
|
439 |
|
|
code = TclCompileExprWords(interp, testTokenPtr, 1, envPtr);
|
440 |
|
|
if (code != TCL_OK) {
|
441 |
|
|
if (code == TCL_ERROR) {
|
442 |
|
|
Tcl_AddObjErrorInfo(interp,
|
443 |
|
|
"\n (\"for\" test expression)", -1);
|
444 |
|
|
}
|
445 |
|
|
goto done;
|
446 |
|
|
}
|
447 |
|
|
maxDepth = TclMax(envPtr->maxStackDepth, maxDepth);
|
448 |
|
|
TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, &jumpFalseFixup);
|
449 |
|
|
|
450 |
|
|
/*
|
451 |
|
|
* Compile the loop body.
|
452 |
|
|
*/
|
453 |
|
|
|
454 |
|
|
nextTokenPtr = testTokenPtr + (testTokenPtr->numComponents + 1);
|
455 |
|
|
bodyTokenPtr = nextTokenPtr + (nextTokenPtr->numComponents + 1);
|
456 |
|
|
envPtr->exceptArrayPtr[bodyRange].codeOffset =
|
457 |
|
|
(envPtr->codeNext - envPtr->codeStart);
|
458 |
|
|
code = TclCompileCmdWord(interp, bodyTokenPtr+1,
|
459 |
|
|
bodyTokenPtr->numComponents, envPtr);
|
460 |
|
|
if (code != TCL_OK) {
|
461 |
|
|
if (code == TCL_ERROR) {
|
462 |
|
|
sprintf(buffer, "\n (\"for\" body line %d)",
|
463 |
|
|
interp->errorLine);
|
464 |
|
|
Tcl_AddObjErrorInfo(interp, buffer, -1);
|
465 |
|
|
}
|
466 |
|
|
goto done;
|
467 |
|
|
}
|
468 |
|
|
maxDepth = TclMax(envPtr->maxStackDepth, maxDepth);
|
469 |
|
|
envPtr->exceptArrayPtr[bodyRange].numCodeBytes =
|
470 |
|
|
(envPtr->codeNext - envPtr->codeStart)
|
471 |
|
|
- envPtr->exceptArrayPtr[bodyRange].codeOffset;
|
472 |
|
|
TclEmitOpcode(INST_POP, envPtr);
|
473 |
|
|
|
474 |
|
|
/*
|
475 |
|
|
* Compile the "next" subcommand.
|
476 |
|
|
*/
|
477 |
|
|
|
478 |
|
|
envPtr->exceptArrayPtr[bodyRange].continueOffset =
|
479 |
|
|
(envPtr->codeNext - envPtr->codeStart);
|
480 |
|
|
envPtr->exceptArrayPtr[nextRange].codeOffset =
|
481 |
|
|
(envPtr->codeNext - envPtr->codeStart);
|
482 |
|
|
code = TclCompileCmdWord(interp, nextTokenPtr+1,
|
483 |
|
|
nextTokenPtr->numComponents, envPtr);
|
484 |
|
|
if (code != TCL_OK) {
|
485 |
|
|
if (code == TCL_ERROR) {
|
486 |
|
|
Tcl_AddObjErrorInfo(interp,
|
487 |
|
|
"\n (\"for\" loop-end command)", -1);
|
488 |
|
|
}
|
489 |
|
|
goto done;
|
490 |
|
|
}
|
491 |
|
|
maxDepth = TclMax(envPtr->maxStackDepth, maxDepth);
|
492 |
|
|
envPtr->exceptArrayPtr[nextRange].numCodeBytes =
|
493 |
|
|
(envPtr->codeNext - envPtr->codeStart)
|
494 |
|
|
- envPtr->exceptArrayPtr[nextRange].codeOffset;
|
495 |
|
|
TclEmitOpcode(INST_POP, envPtr);
|
496 |
|
|
|
497 |
|
|
/*
|
498 |
|
|
* Jump back to the test at the top of the loop. Generate a 4 byte jump
|
499 |
|
|
* if the distance to the test is > 120 bytes. This is conservative and
|
500 |
|
|
* ensures that we won't have to replace this jump if we later need to
|
501 |
|
|
* replace the ifFalse jump with a 4 byte jump.
|
502 |
|
|
*/
|
503 |
|
|
|
504 |
|
|
jumpBackOffset = (envPtr->codeNext - envPtr->codeStart);
|
505 |
|
|
jumpBackDist = (jumpBackOffset - testCodeOffset);
|
506 |
|
|
if (jumpBackDist > 120) {
|
507 |
|
|
TclEmitInstInt4(INST_JUMP4, -jumpBackDist, envPtr);
|
508 |
|
|
} else {
|
509 |
|
|
TclEmitInstInt1(INST_JUMP1, -jumpBackDist, envPtr);
|
510 |
|
|
}
|
511 |
|
|
|
512 |
|
|
/*
|
513 |
|
|
* Fix the target of the jumpFalse after the test.
|
514 |
|
|
*/
|
515 |
|
|
|
516 |
|
|
jumpDist = (envPtr->codeNext - envPtr->codeStart)
|
517 |
|
|
- jumpFalseFixup.codeOffset;
|
518 |
|
|
if (TclFixupForwardJump(envPtr, &jumpFalseFixup, jumpDist, 127)) {
|
519 |
|
|
/*
|
520 |
|
|
* Update the loop body and "next" command ExceptionRanges since
|
521 |
|
|
* they moved down.
|
522 |
|
|
*/
|
523 |
|
|
|
524 |
|
|
envPtr->exceptArrayPtr[bodyRange].codeOffset += 3;
|
525 |
|
|
envPtr->exceptArrayPtr[bodyRange].continueOffset += 3;
|
526 |
|
|
envPtr->exceptArrayPtr[nextRange].codeOffset += 3;
|
527 |
|
|
|
528 |
|
|
/*
|
529 |
|
|
* Update the jump back to the test at the top of the loop since it
|
530 |
|
|
* also moved down 3 bytes.
|
531 |
|
|
*/
|
532 |
|
|
|
533 |
|
|
jumpBackOffset += 3;
|
534 |
|
|
jumpPc = (envPtr->codeStart + jumpBackOffset);
|
535 |
|
|
jumpBackDist += 3;
|
536 |
|
|
if (jumpBackDist > 120) {
|
537 |
|
|
TclUpdateInstInt4AtPc(INST_JUMP4, -jumpBackDist, jumpPc);
|
538 |
|
|
} else {
|
539 |
|
|
TclUpdateInstInt1AtPc(INST_JUMP1, -jumpBackDist, jumpPc);
|
540 |
|
|
}
|
541 |
|
|
}
|
542 |
|
|
|
543 |
|
|
/*
|
544 |
|
|
* Set the loop's break target.
|
545 |
|
|
*/
|
546 |
|
|
|
547 |
|
|
envPtr->exceptArrayPtr[bodyRange].breakOffset =
|
548 |
|
|
envPtr->exceptArrayPtr[nextRange].breakOffset =
|
549 |
|
|
(envPtr->codeNext - envPtr->codeStart);
|
550 |
|
|
|
551 |
|
|
/*
|
552 |
|
|
* The for command's result is an empty string.
|
553 |
|
|
*/
|
554 |
|
|
|
555 |
|
|
TclEmitPush(TclRegisterLiteral(envPtr, "", 0, /*onHeap*/ 0), envPtr);
|
556 |
|
|
if (maxDepth == 0) {
|
557 |
|
|
maxDepth = 1;
|
558 |
|
|
}
|
559 |
|
|
code = TCL_OK;
|
560 |
|
|
|
561 |
|
|
done:
|
562 |
|
|
envPtr->maxStackDepth = maxDepth;
|
563 |
|
|
envPtr->exceptDepth--;
|
564 |
|
|
return code;
|
565 |
|
|
}
|
566 |
|
|
|
567 |
|
|
/*
|
568 |
|
|
*----------------------------------------------------------------------
|
569 |
|
|
*
|
570 |
|
|
* TclCompileForeachCmd --
|
571 |
|
|
*
|
572 |
|
|
* Procedure called to compile the "foreach" command.
|
573 |
|
|
*
|
574 |
|
|
* Results:
|
575 |
|
|
* The return value is a standard Tcl result, which is TCL_OK if
|
576 |
|
|
* compilation was successful. If an error occurs then the
|
577 |
|
|
* interpreter's result contains a standard error message and TCL_ERROR
|
578 |
|
|
* is returned. If the command is too complex for TclCompileForeachCmd,
|
579 |
|
|
* TCL_OUT_LINE_COMPILE is returned indicating that the foreach command
|
580 |
|
|
* should be compiled "out of line" by emitting code to invoke its
|
581 |
|
|
* command procedure at runtime.
|
582 |
|
|
*
|
583 |
|
|
* envPtr->maxStackDepth is updated with the maximum number of stack
|
584 |
|
|
* elements needed to execute the "while" command.
|
585 |
|
|
*
|
586 |
|
|
* Side effects:
|
587 |
|
|
* Instructions are added to envPtr to execute the "foreach" command
|
588 |
|
|
* at runtime.
|
589 |
|
|
*
|
590 |
|
|
*----------------------------------------------------------------------
|
591 |
|
|
*/
|
592 |
|
|
|
593 |
|
|
int
|
594 |
|
|
TclCompileForeachCmd(interp, parsePtr, envPtr)
|
595 |
|
|
Tcl_Interp *interp; /* Used for error reporting. */
|
596 |
|
|
Tcl_Parse *parsePtr; /* Points to a parse structure for the
|
597 |
|
|
* command created by Tcl_ParseCommand. */
|
598 |
|
|
CompileEnv *envPtr; /* Holds resulting instructions. */
|
599 |
|
|
{
|
600 |
|
|
Proc *procPtr = envPtr->procPtr;
|
601 |
|
|
ForeachInfo *infoPtr; /* Points to the structure describing this
|
602 |
|
|
* foreach command. Stored in a AuxData
|
603 |
|
|
* record in the ByteCode. */
|
604 |
|
|
int firstValueTemp; /* Index of the first temp var in the frame
|
605 |
|
|
* used to point to a value list. */
|
606 |
|
|
int loopCtTemp; /* Index of temp var holding the loop's
|
607 |
|
|
* iteration count. */
|
608 |
|
|
Tcl_Token *tokenPtr, *bodyTokenPtr;
|
609 |
|
|
char *varList;
|
610 |
|
|
unsigned char *jumpPc;
|
611 |
|
|
JumpFixup jumpFalseFixup;
|
612 |
|
|
int jumpDist, jumpBackDist, jumpBackOffset, maxDepth, infoIndex, range;
|
613 |
|
|
int numWords, numLists, numVars, loopIndex, tempVar, i, j, code;
|
614 |
|
|
char savedChar;
|
615 |
|
|
char buffer[32 + TCL_INTEGER_SPACE];
|
616 |
|
|
|
617 |
|
|
/*
|
618 |
|
|
* We parse the variable list argument words and create two arrays:
|
619 |
|
|
* varcList[i] is number of variables in i-th var list
|
620 |
|
|
* varvList[i] points to array of var names in i-th var list
|
621 |
|
|
*/
|
622 |
|
|
|
623 |
|
|
#define STATIC_VAR_LIST_SIZE 5
|
624 |
|
|
int varcListStaticSpace[STATIC_VAR_LIST_SIZE];
|
625 |
|
|
char **varvListStaticSpace[STATIC_VAR_LIST_SIZE];
|
626 |
|
|
int *varcList = varcListStaticSpace;
|
627 |
|
|
char ***varvList = varvListStaticSpace;
|
628 |
|
|
|
629 |
|
|
/*
|
630 |
|
|
* If the foreach command isn't in a procedure, don't compile it inline:
|
631 |
|
|
* the payoff is too small.
|
632 |
|
|
*/
|
633 |
|
|
|
634 |
|
|
envPtr->maxStackDepth = 0;
|
635 |
|
|
if (procPtr == NULL) {
|
636 |
|
|
return TCL_OUT_LINE_COMPILE;
|
637 |
|
|
}
|
638 |
|
|
|
639 |
|
|
maxDepth = 0;
|
640 |
|
|
|
641 |
|
|
numWords = parsePtr->numWords;
|
642 |
|
|
if ((numWords < 4) || (numWords%2 != 0)) {
|
643 |
|
|
Tcl_ResetResult(interp);
|
644 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
645 |
|
|
"wrong # args: should be \"foreach varList list ?varList list ...? command\"", -1);
|
646 |
|
|
return TCL_ERROR;
|
647 |
|
|
}
|
648 |
|
|
|
649 |
|
|
/*
|
650 |
|
|
* Allocate storage for the varcList and varvList arrays if necessary.
|
651 |
|
|
*/
|
652 |
|
|
|
653 |
|
|
numLists = (numWords - 2)/2;
|
654 |
|
|
if (numLists > STATIC_VAR_LIST_SIZE) {
|
655 |
|
|
varcList = (int *) ckalloc(numLists * sizeof(int));
|
656 |
|
|
varvList = (char ***) ckalloc(numLists * sizeof(char **));
|
657 |
|
|
}
|
658 |
|
|
for (loopIndex = 0; loopIndex < numLists; loopIndex++) {
|
659 |
|
|
varcList[loopIndex] = 0;
|
660 |
|
|
varvList[loopIndex] = (char **) NULL;
|
661 |
|
|
}
|
662 |
|
|
|
663 |
|
|
/*
|
664 |
|
|
* Set the exception stack depth.
|
665 |
|
|
*/
|
666 |
|
|
|
667 |
|
|
envPtr->exceptDepth++;
|
668 |
|
|
envPtr->maxExceptDepth =
|
669 |
|
|
TclMax(envPtr->exceptDepth, envPtr->maxExceptDepth);
|
670 |
|
|
|
671 |
|
|
/*
|
672 |
|
|
* Break up each var list and set the varcList and varvList arrays.
|
673 |
|
|
* Don't compile the foreach inline if any var name needs substitutions
|
674 |
|
|
* or isn't a scalar, or if any var list needs substitutions.
|
675 |
|
|
*/
|
676 |
|
|
|
677 |
|
|
loopIndex = 0;
|
678 |
|
|
for (i = 0, tokenPtr = parsePtr->tokenPtr;
|
679 |
|
|
i < numWords-1;
|
680 |
|
|
i++, tokenPtr += (tokenPtr->numComponents + 1)) {
|
681 |
|
|
if (i%2 == 1) {
|
682 |
|
|
if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
|
683 |
|
|
code = TCL_OUT_LINE_COMPILE;
|
684 |
|
|
goto done;
|
685 |
|
|
}
|
686 |
|
|
varList = tokenPtr[1].start;
|
687 |
|
|
savedChar = varList[tokenPtr[1].size];
|
688 |
|
|
|
689 |
|
|
/*
|
690 |
|
|
* Note there is a danger that modifying the string could have
|
691 |
|
|
* undesirable side effects. In this case, Tcl_SplitList does
|
692 |
|
|
* not have any dependencies on shared strings so we should be
|
693 |
|
|
* safe.
|
694 |
|
|
*/
|
695 |
|
|
|
696 |
|
|
varList[tokenPtr[1].size] = '\0';
|
697 |
|
|
code = Tcl_SplitList(interp, varList,
|
698 |
|
|
&varcList[loopIndex], &varvList[loopIndex]);
|
699 |
|
|
varList[tokenPtr[1].size] = savedChar;
|
700 |
|
|
if (code != TCL_OK) {
|
701 |
|
|
goto done;
|
702 |
|
|
}
|
703 |
|
|
|
704 |
|
|
numVars = varcList[loopIndex];
|
705 |
|
|
for (j = 0; j < numVars; j++) {
|
706 |
|
|
char *varName = varvList[loopIndex][j];
|
707 |
|
|
if (!TclIsLocalScalar(varName, (int) strlen(varName))) {
|
708 |
|
|
code = TCL_OUT_LINE_COMPILE;
|
709 |
|
|
goto done;
|
710 |
|
|
}
|
711 |
|
|
}
|
712 |
|
|
loopIndex++;
|
713 |
|
|
}
|
714 |
|
|
}
|
715 |
|
|
|
716 |
|
|
/*
|
717 |
|
|
* We will compile the foreach command.
|
718 |
|
|
* Reserve (numLists + 1) temporary variables:
|
719 |
|
|
* - numLists temps to hold each value list
|
720 |
|
|
* - 1 temp for the loop counter (index of next element in each list)
|
721 |
|
|
* At this time we don't try to reuse temporaries; if there are two
|
722 |
|
|
* nonoverlapping foreach loops, they don't share any temps.
|
723 |
|
|
*/
|
724 |
|
|
|
725 |
|
|
firstValueTemp = -1;
|
726 |
|
|
for (loopIndex = 0; loopIndex < numLists; loopIndex++) {
|
727 |
|
|
tempVar = TclFindCompiledLocal(NULL, /*nameChars*/ 0,
|
728 |
|
|
/*create*/ 1, /*flags*/ VAR_SCALAR, procPtr);
|
729 |
|
|
if (loopIndex == 0) {
|
730 |
|
|
firstValueTemp = tempVar;
|
731 |
|
|
}
|
732 |
|
|
}
|
733 |
|
|
loopCtTemp = TclFindCompiledLocal(NULL, /*nameChars*/ 0,
|
734 |
|
|
/*create*/ 1, /*flags*/ VAR_SCALAR, procPtr);
|
735 |
|
|
|
736 |
|
|
/*
|
737 |
|
|
* Create and initialize the ForeachInfo and ForeachVarList data
|
738 |
|
|
* structures describing this command. Then create a AuxData record
|
739 |
|
|
* pointing to the ForeachInfo structure.
|
740 |
|
|
*/
|
741 |
|
|
|
742 |
|
|
infoPtr = (ForeachInfo *) ckalloc((unsigned)
|
743 |
|
|
(sizeof(ForeachInfo) + (numLists * sizeof(ForeachVarList *))));
|
744 |
|
|
infoPtr->numLists = numLists;
|
745 |
|
|
infoPtr->firstValueTemp = firstValueTemp;
|
746 |
|
|
infoPtr->loopCtTemp = loopCtTemp;
|
747 |
|
|
for (loopIndex = 0; loopIndex < numLists; loopIndex++) {
|
748 |
|
|
ForeachVarList *varListPtr;
|
749 |
|
|
numVars = varcList[loopIndex];
|
750 |
|
|
varListPtr = (ForeachVarList *) ckalloc((unsigned)
|
751 |
|
|
sizeof(ForeachVarList) + (numVars * sizeof(int)));
|
752 |
|
|
varListPtr->numVars = numVars;
|
753 |
|
|
for (j = 0; j < numVars; j++) {
|
754 |
|
|
char *varName = varvList[loopIndex][j];
|
755 |
|
|
int nameChars = strlen(varName);
|
756 |
|
|
varListPtr->varIndexes[j] = TclFindCompiledLocal(varName,
|
757 |
|
|
nameChars, /*create*/ 1, /*flags*/ VAR_SCALAR, procPtr);
|
758 |
|
|
}
|
759 |
|
|
infoPtr->varLists[loopIndex] = varListPtr;
|
760 |
|
|
}
|
761 |
|
|
infoIndex = TclCreateAuxData((ClientData) infoPtr, &tclForeachInfoType, envPtr);
|
762 |
|
|
|
763 |
|
|
/*
|
764 |
|
|
* Evaluate then store each value list in the associated temporary.
|
765 |
|
|
*/
|
766 |
|
|
|
767 |
|
|
range = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr);
|
768 |
|
|
|
769 |
|
|
loopIndex = 0;
|
770 |
|
|
for (i = 0, tokenPtr = parsePtr->tokenPtr;
|
771 |
|
|
i < numWords-1;
|
772 |
|
|
i++, tokenPtr += (tokenPtr->numComponents + 1)) {
|
773 |
|
|
if ((i%2 == 0) && (i > 0)) {
|
774 |
|
|
code = TclCompileTokens(interp, tokenPtr+1,
|
775 |
|
|
tokenPtr->numComponents, envPtr);
|
776 |
|
|
if (code != TCL_OK) {
|
777 |
|
|
goto done;
|
778 |
|
|
}
|
779 |
|
|
maxDepth = TclMax(envPtr->maxStackDepth, maxDepth);
|
780 |
|
|
|
781 |
|
|
tempVar = (firstValueTemp + loopIndex);
|
782 |
|
|
if (tempVar <= 255) {
|
783 |
|
|
TclEmitInstInt1(INST_STORE_SCALAR1, tempVar, envPtr);
|
784 |
|
|
} else {
|
785 |
|
|
TclEmitInstInt4(INST_STORE_SCALAR4, tempVar, envPtr);
|
786 |
|
|
}
|
787 |
|
|
TclEmitOpcode(INST_POP, envPtr);
|
788 |
|
|
loopIndex++;
|
789 |
|
|
}
|
790 |
|
|
}
|
791 |
|
|
bodyTokenPtr = tokenPtr;
|
792 |
|
|
|
793 |
|
|
/*
|
794 |
|
|
* Initialize the temporary var that holds the count of loop iterations.
|
795 |
|
|
*/
|
796 |
|
|
|
797 |
|
|
TclEmitInstInt4(INST_FOREACH_START4, infoIndex, envPtr);
|
798 |
|
|
|
799 |
|
|
/*
|
800 |
|
|
* Top of loop code: assign each loop variable and check whether
|
801 |
|
|
* to terminate the loop.
|
802 |
|
|
*/
|
803 |
|
|
|
804 |
|
|
envPtr->exceptArrayPtr[range].continueOffset =
|
805 |
|
|
(envPtr->codeNext - envPtr->codeStart);
|
806 |
|
|
TclEmitInstInt4(INST_FOREACH_STEP4, infoIndex, envPtr);
|
807 |
|
|
TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, &jumpFalseFixup);
|
808 |
|
|
|
809 |
|
|
/*
|
810 |
|
|
* Inline compile the loop body.
|
811 |
|
|
*/
|
812 |
|
|
|
813 |
|
|
envPtr->exceptArrayPtr[range].codeOffset =
|
814 |
|
|
(envPtr->codeNext - envPtr->codeStart);
|
815 |
|
|
code = TclCompileCmdWord(interp, bodyTokenPtr+1,
|
816 |
|
|
bodyTokenPtr->numComponents, envPtr);
|
817 |
|
|
if (code != TCL_OK) {
|
818 |
|
|
if (code == TCL_ERROR) {
|
819 |
|
|
sprintf(buffer, "\n (\"foreach\" body line %d)",
|
820 |
|
|
interp->errorLine);
|
821 |
|
|
Tcl_AddObjErrorInfo(interp, buffer, -1);
|
822 |
|
|
}
|
823 |
|
|
goto done;
|
824 |
|
|
}
|
825 |
|
|
maxDepth = TclMax(envPtr->maxStackDepth, maxDepth);
|
826 |
|
|
envPtr->exceptArrayPtr[range].numCodeBytes =
|
827 |
|
|
(envPtr->codeNext - envPtr->codeStart)
|
828 |
|
|
- envPtr->exceptArrayPtr[range].codeOffset;
|
829 |
|
|
TclEmitOpcode(INST_POP, envPtr);
|
830 |
|
|
|
831 |
|
|
/*
|
832 |
|
|
* Jump back to the test at the top of the loop. Generate a 4 byte jump
|
833 |
|
|
* if the distance to the test is > 120 bytes. This is conservative and
|
834 |
|
|
* ensures that we won't have to replace this jump if we later need to
|
835 |
|
|
* replace the ifFalse jump with a 4 byte jump.
|
836 |
|
|
*/
|
837 |
|
|
|
838 |
|
|
jumpBackOffset = (envPtr->codeNext - envPtr->codeStart);
|
839 |
|
|
jumpBackDist =
|
840 |
|
|
(jumpBackOffset - envPtr->exceptArrayPtr[range].continueOffset);
|
841 |
|
|
if (jumpBackDist > 120) {
|
842 |
|
|
TclEmitInstInt4(INST_JUMP4, -jumpBackDist, envPtr);
|
843 |
|
|
} else {
|
844 |
|
|
TclEmitInstInt1(INST_JUMP1, -jumpBackDist, envPtr);
|
845 |
|
|
}
|
846 |
|
|
|
847 |
|
|
/*
|
848 |
|
|
* Fix the target of the jump after the foreach_step test.
|
849 |
|
|
*/
|
850 |
|
|
|
851 |
|
|
jumpDist = (envPtr->codeNext - envPtr->codeStart)
|
852 |
|
|
- jumpFalseFixup.codeOffset;
|
853 |
|
|
if (TclFixupForwardJump(envPtr, &jumpFalseFixup, jumpDist, 127)) {
|
854 |
|
|
/*
|
855 |
|
|
* Update the loop body's starting PC offset since it moved down.
|
856 |
|
|
*/
|
857 |
|
|
|
858 |
|
|
envPtr->exceptArrayPtr[range].codeOffset += 3;
|
859 |
|
|
|
860 |
|
|
/*
|
861 |
|
|
* Update the jump back to the test at the top of the loop since it
|
862 |
|
|
* also moved down 3 bytes.
|
863 |
|
|
*/
|
864 |
|
|
|
865 |
|
|
jumpBackOffset += 3;
|
866 |
|
|
jumpPc = (envPtr->codeStart + jumpBackOffset);
|
867 |
|
|
jumpBackDist += 3;
|
868 |
|
|
if (jumpBackDist > 120) {
|
869 |
|
|
TclUpdateInstInt4AtPc(INST_JUMP4, -jumpBackDist, jumpPc);
|
870 |
|
|
} else {
|
871 |
|
|
TclUpdateInstInt1AtPc(INST_JUMP1, -jumpBackDist, jumpPc);
|
872 |
|
|
}
|
873 |
|
|
}
|
874 |
|
|
|
875 |
|
|
/*
|
876 |
|
|
* Set the loop's break target.
|
877 |
|
|
*/
|
878 |
|
|
|
879 |
|
|
envPtr->exceptArrayPtr[range].breakOffset =
|
880 |
|
|
(envPtr->codeNext - envPtr->codeStart);
|
881 |
|
|
|
882 |
|
|
/*
|
883 |
|
|
* The foreach command's result is an empty string.
|
884 |
|
|
*/
|
885 |
|
|
|
886 |
|
|
TclEmitPush(TclRegisterLiteral(envPtr, "", 0, /*onHeap*/ 0), envPtr);
|
887 |
|
|
if (maxDepth == 0) {
|
888 |
|
|
maxDepth = 1;
|
889 |
|
|
}
|
890 |
|
|
|
891 |
|
|
done:
|
892 |
|
|
for (loopIndex = 0; loopIndex < numLists; loopIndex++) {
|
893 |
|
|
if (varvList[loopIndex] != (char **) NULL) {
|
894 |
|
|
ckfree((char *) varvList[loopIndex]);
|
895 |
|
|
}
|
896 |
|
|
}
|
897 |
|
|
if (varcList != varcListStaticSpace) {
|
898 |
|
|
ckfree((char *) varcList);
|
899 |
|
|
ckfree((char *) varvList);
|
900 |
|
|
}
|
901 |
|
|
envPtr->maxStackDepth = maxDepth;
|
902 |
|
|
envPtr->exceptDepth--;
|
903 |
|
|
return code;
|
904 |
|
|
}
|
905 |
|
|
|
906 |
|
|
/*
|
907 |
|
|
*----------------------------------------------------------------------
|
908 |
|
|
*
|
909 |
|
|
* DupForeachInfo --
|
910 |
|
|
*
|
911 |
|
|
* This procedure duplicates a ForeachInfo structure created as
|
912 |
|
|
* auxiliary data during the compilation of a foreach command.
|
913 |
|
|
*
|
914 |
|
|
* Results:
|
915 |
|
|
* A pointer to a newly allocated copy of the existing ForeachInfo
|
916 |
|
|
* structure is returned.
|
917 |
|
|
*
|
918 |
|
|
* Side effects:
|
919 |
|
|
* Storage for the copied ForeachInfo record is allocated. If the
|
920 |
|
|
* original ForeachInfo structure pointed to any ForeachVarList
|
921 |
|
|
* records, these structures are also copied and pointers to them
|
922 |
|
|
* are stored in the new ForeachInfo record.
|
923 |
|
|
*
|
924 |
|
|
*----------------------------------------------------------------------
|
925 |
|
|
*/
|
926 |
|
|
|
927 |
|
|
static ClientData
|
928 |
|
|
DupForeachInfo(clientData)
|
929 |
|
|
ClientData clientData; /* The foreach command's compilation
|
930 |
|
|
* auxiliary data to duplicate. */
|
931 |
|
|
{
|
932 |
|
|
register ForeachInfo *srcPtr = (ForeachInfo *) clientData;
|
933 |
|
|
ForeachInfo *dupPtr;
|
934 |
|
|
register ForeachVarList *srcListPtr, *dupListPtr;
|
935 |
|
|
int numLists = srcPtr->numLists;
|
936 |
|
|
int numVars, i, j;
|
937 |
|
|
|
938 |
|
|
dupPtr = (ForeachInfo *) ckalloc((unsigned)
|
939 |
|
|
(sizeof(ForeachInfo) + (numLists * sizeof(ForeachVarList *))));
|
940 |
|
|
dupPtr->numLists = numLists;
|
941 |
|
|
dupPtr->firstValueTemp = srcPtr->firstValueTemp;
|
942 |
|
|
dupPtr->loopCtTemp = srcPtr->loopCtTemp;
|
943 |
|
|
|
944 |
|
|
for (i = 0; i < numLists; i++) {
|
945 |
|
|
srcListPtr = srcPtr->varLists[i];
|
946 |
|
|
numVars = srcListPtr->numVars;
|
947 |
|
|
dupListPtr = (ForeachVarList *) ckalloc((unsigned)
|
948 |
|
|
sizeof(ForeachVarList) + numVars*sizeof(int));
|
949 |
|
|
dupListPtr->numVars = numVars;
|
950 |
|
|
for (j = 0; j < numVars; j++) {
|
951 |
|
|
dupListPtr->varIndexes[j] = srcListPtr->varIndexes[j];
|
952 |
|
|
}
|
953 |
|
|
dupPtr->varLists[i] = dupListPtr;
|
954 |
|
|
}
|
955 |
|
|
return (ClientData) dupPtr;
|
956 |
|
|
}
|
957 |
|
|
|
958 |
|
|
/*
|
959 |
|
|
*----------------------------------------------------------------------
|
960 |
|
|
*
|
961 |
|
|
* FreeForeachInfo --
|
962 |
|
|
*
|
963 |
|
|
* Procedure to free a ForeachInfo structure created as auxiliary data
|
964 |
|
|
* during the compilation of a foreach command.
|
965 |
|
|
*
|
966 |
|
|
* Results:
|
967 |
|
|
* None.
|
968 |
|
|
*
|
969 |
|
|
* Side effects:
|
970 |
|
|
* Storage for the ForeachInfo structure pointed to by the ClientData
|
971 |
|
|
* argument is freed as is any ForeachVarList record pointed to by the
|
972 |
|
|
* ForeachInfo structure.
|
973 |
|
|
*
|
974 |
|
|
*----------------------------------------------------------------------
|
975 |
|
|
*/
|
976 |
|
|
|
977 |
|
|
static void
|
978 |
|
|
FreeForeachInfo(clientData)
|
979 |
|
|
ClientData clientData; /* The foreach command's compilation
|
980 |
|
|
* auxiliary data to free. */
|
981 |
|
|
{
|
982 |
|
|
register ForeachInfo *infoPtr = (ForeachInfo *) clientData;
|
983 |
|
|
register ForeachVarList *listPtr;
|
984 |
|
|
int numLists = infoPtr->numLists;
|
985 |
|
|
register int i;
|
986 |
|
|
|
987 |
|
|
for (i = 0; i < numLists; i++) {
|
988 |
|
|
listPtr = infoPtr->varLists[i];
|
989 |
|
|
ckfree((char *) listPtr);
|
990 |
|
|
}
|
991 |
|
|
ckfree((char *) infoPtr);
|
992 |
|
|
}
|
993 |
|
|
|
994 |
|
|
/*
|
995 |
|
|
*----------------------------------------------------------------------
|
996 |
|
|
*
|
997 |
|
|
* TclCompileIfCmd --
|
998 |
|
|
*
|
999 |
|
|
* Procedure called to compile the "if" command.
|
1000 |
|
|
*
|
1001 |
|
|
* Results:
|
1002 |
|
|
* The return value is a standard Tcl result, which is TCL_OK if
|
1003 |
|
|
* compilation was successful. If an error occurs then the
|
1004 |
|
|
* interpreter's result contains a standard error message and TCL_ERROR
|
1005 |
|
|
* is returned. If the command is too complex for TclCompileIfCmd,
|
1006 |
|
|
* TCL_OUT_LINE_COMPILE is returned indicating that the if command
|
1007 |
|
|
* should be compiled "out of line" by emitting code to invoke its
|
1008 |
|
|
* command procedure at runtime.
|
1009 |
|
|
*
|
1010 |
|
|
* envPtr->maxStackDepth is updated with the maximum number of stack
|
1011 |
|
|
* elements needed to execute the command.
|
1012 |
|
|
*
|
1013 |
|
|
* Side effects:
|
1014 |
|
|
* Instructions are added to envPtr to execute the "if" command
|
1015 |
|
|
* at runtime.
|
1016 |
|
|
*
|
1017 |
|
|
*----------------------------------------------------------------------
|
1018 |
|
|
*/
|
1019 |
|
|
|
1020 |
|
|
int
|
1021 |
|
|
TclCompileIfCmd(interp, parsePtr, envPtr)
|
1022 |
|
|
Tcl_Interp *interp; /* Used for error reporting. */
|
1023 |
|
|
Tcl_Parse *parsePtr; /* Points to a parse structure for the
|
1024 |
|
|
* command created by Tcl_ParseCommand. */
|
1025 |
|
|
CompileEnv *envPtr; /* Holds resulting instructions. */
|
1026 |
|
|
{
|
1027 |
|
|
JumpFixupArray jumpFalseFixupArray;
|
1028 |
|
|
/* Used to fix the ifFalse jump after each
|
1029 |
|
|
* test when its target PC is determined. */
|
1030 |
|
|
JumpFixupArray jumpEndFixupArray;
|
1031 |
|
|
/* Used to fix the jump after each "then"
|
1032 |
|
|
* body to the end of the "if" when that PC
|
1033 |
|
|
* is determined. */
|
1034 |
|
|
Tcl_Token *tokenPtr, *testTokenPtr;
|
1035 |
|
|
int jumpDist, jumpFalseDist, jumpIndex;
|
1036 |
|
|
int numWords, wordIdx, numBytes, maxDepth, j, code;
|
1037 |
|
|
char *word;
|
1038 |
|
|
char buffer[100];
|
1039 |
|
|
|
1040 |
|
|
TclInitJumpFixupArray(&jumpFalseFixupArray);
|
1041 |
|
|
TclInitJumpFixupArray(&jumpEndFixupArray);
|
1042 |
|
|
maxDepth = 0;
|
1043 |
|
|
code = TCL_OK;
|
1044 |
|
|
|
1045 |
|
|
/*
|
1046 |
|
|
* Each iteration of this loop compiles one "if expr ?then? body"
|
1047 |
|
|
* or "elseif expr ?then? body" clause.
|
1048 |
|
|
*/
|
1049 |
|
|
|
1050 |
|
|
tokenPtr = parsePtr->tokenPtr;
|
1051 |
|
|
wordIdx = 0;
|
1052 |
|
|
numWords = parsePtr->numWords;
|
1053 |
|
|
while (wordIdx < numWords) {
|
1054 |
|
|
/*
|
1055 |
|
|
* Stop looping if the token isn't "if" or "elseif".
|
1056 |
|
|
*/
|
1057 |
|
|
|
1058 |
|
|
if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
|
1059 |
|
|
break;
|
1060 |
|
|
}
|
1061 |
|
|
word = tokenPtr[1].start;
|
1062 |
|
|
numBytes = tokenPtr[1].size;
|
1063 |
|
|
if ((tokenPtr == parsePtr->tokenPtr)
|
1064 |
|
|
|| ((numBytes == 6) && (strncmp(word, "elseif", 6) == 0))) {
|
1065 |
|
|
tokenPtr += (tokenPtr->numComponents + 1);
|
1066 |
|
|
wordIdx++;
|
1067 |
|
|
} else {
|
1068 |
|
|
break;
|
1069 |
|
|
}
|
1070 |
|
|
if (wordIdx >= numWords) {
|
1071 |
|
|
sprintf(buffer,
|
1072 |
|
|
"wrong # args: no expression after \"%.30s\" argument",
|
1073 |
|
|
word);
|
1074 |
|
|
Tcl_ResetResult(interp);
|
1075 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), buffer, -1);
|
1076 |
|
|
code = TCL_ERROR;
|
1077 |
|
|
goto done;
|
1078 |
|
|
}
|
1079 |
|
|
|
1080 |
|
|
/*
|
1081 |
|
|
* Compile the test expression then emit the conditional jump
|
1082 |
|
|
* around the "then" part. If the expression word isn't simple,
|
1083 |
|
|
* we back off and compile the if command out-of-line.
|
1084 |
|
|
*/
|
1085 |
|
|
|
1086 |
|
|
testTokenPtr = tokenPtr;
|
1087 |
|
|
code = TclCompileExprWords(interp, testTokenPtr, 1, envPtr);
|
1088 |
|
|
if (code != TCL_OK) {
|
1089 |
|
|
if (code == TCL_ERROR) {
|
1090 |
|
|
Tcl_AddObjErrorInfo(interp,
|
1091 |
|
|
"\n (\"if\" test expression)", -1);
|
1092 |
|
|
}
|
1093 |
|
|
goto done;
|
1094 |
|
|
}
|
1095 |
|
|
maxDepth = TclMax(envPtr->maxStackDepth, maxDepth);
|
1096 |
|
|
if (jumpFalseFixupArray.next >= jumpFalseFixupArray.end) {
|
1097 |
|
|
TclExpandJumpFixupArray(&jumpFalseFixupArray);
|
1098 |
|
|
}
|
1099 |
|
|
jumpIndex = jumpFalseFixupArray.next;
|
1100 |
|
|
jumpFalseFixupArray.next++;
|
1101 |
|
|
TclEmitForwardJump(envPtr, TCL_FALSE_JUMP,
|
1102 |
|
|
&(jumpFalseFixupArray.fixup[jumpIndex]));
|
1103 |
|
|
|
1104 |
|
|
/*
|
1105 |
|
|
* Skip over the optional "then" before the then clause.
|
1106 |
|
|
*/
|
1107 |
|
|
|
1108 |
|
|
tokenPtr = testTokenPtr + (testTokenPtr->numComponents + 1);
|
1109 |
|
|
wordIdx++;
|
1110 |
|
|
if (wordIdx >= numWords) {
|
1111 |
|
|
sprintf(buffer, "wrong # args: no script following \"%.20s\" argument", testTokenPtr->start);
|
1112 |
|
|
Tcl_ResetResult(interp);
|
1113 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp), buffer, -1);
|
1114 |
|
|
code = TCL_ERROR;
|
1115 |
|
|
goto done;
|
1116 |
|
|
}
|
1117 |
|
|
if (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
|
1118 |
|
|
word = tokenPtr[1].start;
|
1119 |
|
|
numBytes = tokenPtr[1].size;
|
1120 |
|
|
if ((numBytes == 4) && (strncmp(word, "then", 4) == 0)) {
|
1121 |
|
|
tokenPtr += (tokenPtr->numComponents + 1);
|
1122 |
|
|
wordIdx++;
|
1123 |
|
|
if (wordIdx >= numWords) {
|
1124 |
|
|
Tcl_ResetResult(interp);
|
1125 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
1126 |
|
|
"wrong # args: no script following \"then\" argument", -1);
|
1127 |
|
|
code = TCL_ERROR;
|
1128 |
|
|
goto done;
|
1129 |
|
|
}
|
1130 |
|
|
}
|
1131 |
|
|
}
|
1132 |
|
|
|
1133 |
|
|
/*
|
1134 |
|
|
* Compile the "then" command body.
|
1135 |
|
|
*/
|
1136 |
|
|
|
1137 |
|
|
code = TclCompileCmdWord(interp, tokenPtr+1,
|
1138 |
|
|
tokenPtr->numComponents, envPtr);
|
1139 |
|
|
if (code != TCL_OK) {
|
1140 |
|
|
if (code == TCL_ERROR) {
|
1141 |
|
|
sprintf(buffer, "\n (\"if\" then script line %d)",
|
1142 |
|
|
interp->errorLine);
|
1143 |
|
|
Tcl_AddObjErrorInfo(interp, buffer, -1);
|
1144 |
|
|
}
|
1145 |
|
|
goto done;
|
1146 |
|
|
}
|
1147 |
|
|
maxDepth = TclMax(envPtr->maxStackDepth, maxDepth);
|
1148 |
|
|
|
1149 |
|
|
/*
|
1150 |
|
|
* Jump to the end of the "if" command. Both jumpFalseFixupArray and
|
1151 |
|
|
* jumpEndFixupArray are indexed by "jumpIndex".
|
1152 |
|
|
*/
|
1153 |
|
|
|
1154 |
|
|
if (jumpEndFixupArray.next >= jumpEndFixupArray.end) {
|
1155 |
|
|
TclExpandJumpFixupArray(&jumpEndFixupArray);
|
1156 |
|
|
}
|
1157 |
|
|
jumpEndFixupArray.next++;
|
1158 |
|
|
TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP,
|
1159 |
|
|
&(jumpEndFixupArray.fixup[jumpIndex]));
|
1160 |
|
|
|
1161 |
|
|
/*
|
1162 |
|
|
* Fix the target of the jumpFalse after the test. Generate a 4 byte
|
1163 |
|
|
* jump if the distance is > 120 bytes. This is conservative, and
|
1164 |
|
|
* ensures that we won't have to replace this jump if we later also
|
1165 |
|
|
* need to replace the proceeding jump to the end of the "if" with a
|
1166 |
|
|
* 4 byte jump.
|
1167 |
|
|
*/
|
1168 |
|
|
|
1169 |
|
|
jumpDist = (envPtr->codeNext - envPtr->codeStart)
|
1170 |
|
|
- jumpFalseFixupArray.fixup[jumpIndex].codeOffset;
|
1171 |
|
|
if (TclFixupForwardJump(envPtr,
|
1172 |
|
|
&(jumpFalseFixupArray.fixup[jumpIndex]), jumpDist, 120)) {
|
1173 |
|
|
/*
|
1174 |
|
|
* Adjust the code offset for the proceeding jump to the end
|
1175 |
|
|
* of the "if" command.
|
1176 |
|
|
*/
|
1177 |
|
|
|
1178 |
|
|
jumpEndFixupArray.fixup[jumpIndex].codeOffset += 3;
|
1179 |
|
|
}
|
1180 |
|
|
|
1181 |
|
|
tokenPtr += (tokenPtr->numComponents + 1);
|
1182 |
|
|
wordIdx++;
|
1183 |
|
|
}
|
1184 |
|
|
|
1185 |
|
|
/*
|
1186 |
|
|
* Check for the optional else clause.
|
1187 |
|
|
*/
|
1188 |
|
|
|
1189 |
|
|
if ((wordIdx < numWords)
|
1190 |
|
|
&& (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD)) {
|
1191 |
|
|
/*
|
1192 |
|
|
* There is an else clause. Skip over the optional "else" word.
|
1193 |
|
|
*/
|
1194 |
|
|
|
1195 |
|
|
word = tokenPtr[1].start;
|
1196 |
|
|
numBytes = tokenPtr[1].size;
|
1197 |
|
|
if ((numBytes == 4) && (strncmp(word, "else", 4) == 0)) {
|
1198 |
|
|
tokenPtr += (tokenPtr->numComponents + 1);
|
1199 |
|
|
wordIdx++;
|
1200 |
|
|
if (wordIdx >= numWords) {
|
1201 |
|
|
Tcl_ResetResult(interp);
|
1202 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
1203 |
|
|
"wrong # args: no script following \"else\" argument", -1);
|
1204 |
|
|
code = TCL_ERROR;
|
1205 |
|
|
goto done;
|
1206 |
|
|
}
|
1207 |
|
|
}
|
1208 |
|
|
|
1209 |
|
|
/*
|
1210 |
|
|
* Compile the else command body.
|
1211 |
|
|
*/
|
1212 |
|
|
|
1213 |
|
|
code = TclCompileCmdWord(interp, tokenPtr+1,
|
1214 |
|
|
tokenPtr->numComponents, envPtr);
|
1215 |
|
|
if (code != TCL_OK) {
|
1216 |
|
|
if (code == TCL_ERROR) {
|
1217 |
|
|
sprintf(buffer, "\n (\"if\" else script line %d)",
|
1218 |
|
|
interp->errorLine);
|
1219 |
|
|
Tcl_AddObjErrorInfo(interp, buffer, -1);
|
1220 |
|
|
}
|
1221 |
|
|
goto done;
|
1222 |
|
|
}
|
1223 |
|
|
maxDepth = TclMax(envPtr->maxStackDepth, maxDepth);
|
1224 |
|
|
|
1225 |
|
|
/*
|
1226 |
|
|
* Make sure there are no words after the else clause.
|
1227 |
|
|
*/
|
1228 |
|
|
|
1229 |
|
|
wordIdx++;
|
1230 |
|
|
if (wordIdx < numWords) {
|
1231 |
|
|
Tcl_ResetResult(interp);
|
1232 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
1233 |
|
|
"wrong # args: extra words after \"else\" clause in \"if\" command", -1);
|
1234 |
|
|
code = TCL_ERROR;
|
1235 |
|
|
goto done;
|
1236 |
|
|
}
|
1237 |
|
|
} else {
|
1238 |
|
|
/*
|
1239 |
|
|
* No else clause: the "if" command's result is an empty string.
|
1240 |
|
|
*/
|
1241 |
|
|
|
1242 |
|
|
TclEmitPush(TclRegisterLiteral(envPtr, "", 0,/*onHeap*/ 0), envPtr);
|
1243 |
|
|
maxDepth = TclMax(1, maxDepth);
|
1244 |
|
|
}
|
1245 |
|
|
|
1246 |
|
|
/*
|
1247 |
|
|
* Fix the unconditional jumps to the end of the "if" command.
|
1248 |
|
|
*/
|
1249 |
|
|
|
1250 |
|
|
for (j = jumpEndFixupArray.next; j > 0; j--) {
|
1251 |
|
|
jumpIndex = (j - 1); /* i.e. process the closest jump first */
|
1252 |
|
|
jumpDist = (envPtr->codeNext - envPtr->codeStart)
|
1253 |
|
|
- jumpEndFixupArray.fixup[jumpIndex].codeOffset;
|
1254 |
|
|
if (TclFixupForwardJump(envPtr,
|
1255 |
|
|
&(jumpEndFixupArray.fixup[jumpIndex]), jumpDist, 127)) {
|
1256 |
|
|
/*
|
1257 |
|
|
* Adjust the immediately preceeding "ifFalse" jump. We moved
|
1258 |
|
|
* it's target (just after this jump) down three bytes.
|
1259 |
|
|
*/
|
1260 |
|
|
|
1261 |
|
|
unsigned char *ifFalsePc = envPtr->codeStart
|
1262 |
|
|
+ jumpFalseFixupArray.fixup[jumpIndex].codeOffset;
|
1263 |
|
|
unsigned char opCode = *ifFalsePc;
|
1264 |
|
|
if (opCode == INST_JUMP_FALSE1) {
|
1265 |
|
|
jumpFalseDist = TclGetInt1AtPtr(ifFalsePc + 1);
|
1266 |
|
|
jumpFalseDist += 3;
|
1267 |
|
|
TclStoreInt1AtPtr(jumpFalseDist, (ifFalsePc + 1));
|
1268 |
|
|
} else if (opCode == INST_JUMP_FALSE4) {
|
1269 |
|
|
jumpFalseDist = TclGetInt4AtPtr(ifFalsePc + 1);
|
1270 |
|
|
jumpFalseDist += 3;
|
1271 |
|
|
TclStoreInt4AtPtr(jumpFalseDist, (ifFalsePc + 1));
|
1272 |
|
|
} else {
|
1273 |
|
|
panic("TclCompileIfCmd: unexpected opcode updating ifFalse jump");
|
1274 |
|
|
}
|
1275 |
|
|
}
|
1276 |
|
|
}
|
1277 |
|
|
|
1278 |
|
|
/*
|
1279 |
|
|
* Free the jumpFixupArray array if malloc'ed storage was used.
|
1280 |
|
|
*/
|
1281 |
|
|
|
1282 |
|
|
done:
|
1283 |
|
|
TclFreeJumpFixupArray(&jumpFalseFixupArray);
|
1284 |
|
|
TclFreeJumpFixupArray(&jumpEndFixupArray);
|
1285 |
|
|
envPtr->maxStackDepth = maxDepth;
|
1286 |
|
|
return code;
|
1287 |
|
|
}
|
1288 |
|
|
|
1289 |
|
|
/*
|
1290 |
|
|
*----------------------------------------------------------------------
|
1291 |
|
|
*
|
1292 |
|
|
* TclCompileIncrCmd --
|
1293 |
|
|
*
|
1294 |
|
|
* Procedure called to compile the "incr" command.
|
1295 |
|
|
*
|
1296 |
|
|
* Results:
|
1297 |
|
|
* The return value is a standard Tcl result, which is TCL_OK if
|
1298 |
|
|
* compilation was successful. If an error occurs then the
|
1299 |
|
|
* interpreter's result contains a standard error message and TCL_ERROR
|
1300 |
|
|
* is returned. If the command is too complex for TclCompileIncrCmd,
|
1301 |
|
|
* TCL_OUT_LINE_COMPILE is returned indicating that the incr command
|
1302 |
|
|
* should be compiled "out of line" by emitting code to invoke its
|
1303 |
|
|
* command procedure at runtime.
|
1304 |
|
|
*
|
1305 |
|
|
* envPtr->maxStackDepth is updated with the maximum number of stack
|
1306 |
|
|
* elements needed to execute the "incr" command.
|
1307 |
|
|
*
|
1308 |
|
|
* Side effects:
|
1309 |
|
|
* Instructions are added to envPtr to execute the "incr" command
|
1310 |
|
|
* at runtime.
|
1311 |
|
|
*
|
1312 |
|
|
*----------------------------------------------------------------------
|
1313 |
|
|
*/
|
1314 |
|
|
|
1315 |
|
|
int
|
1316 |
|
|
TclCompileIncrCmd(interp, parsePtr, envPtr)
|
1317 |
|
|
Tcl_Interp *interp; /* Used for error reporting. */
|
1318 |
|
|
Tcl_Parse *parsePtr; /* Points to a parse structure for the
|
1319 |
|
|
* command created by Tcl_ParseCommand. */
|
1320 |
|
|
CompileEnv *envPtr; /* Holds resulting instructions. */
|
1321 |
|
|
{
|
1322 |
|
|
Tcl_Token *varTokenPtr, *incrTokenPtr;
|
1323 |
|
|
Tcl_Parse elemParse;
|
1324 |
|
|
int gotElemParse = 0;
|
1325 |
|
|
char *name, *elName, *p;
|
1326 |
|
|
int nameChars, elNameChars, haveImmValue, immValue, localIndex, i, code;
|
1327 |
|
|
int maxDepth = 0;
|
1328 |
|
|
char buffer[160];
|
1329 |
|
|
|
1330 |
|
|
envPtr->maxStackDepth = 0;
|
1331 |
|
|
if ((parsePtr->numWords != 2) && (parsePtr->numWords != 3)) {
|
1332 |
|
|
Tcl_ResetResult(interp);
|
1333 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
1334 |
|
|
"wrong # args: should be \"incr varName ?increment?\"", -1);
|
1335 |
|
|
return TCL_ERROR;
|
1336 |
|
|
}
|
1337 |
|
|
|
1338 |
|
|
name = NULL;
|
1339 |
|
|
elName = NULL;
|
1340 |
|
|
elNameChars = 0;
|
1341 |
|
|
localIndex = -1;
|
1342 |
|
|
code = TCL_OK;
|
1343 |
|
|
|
1344 |
|
|
varTokenPtr = parsePtr->tokenPtr
|
1345 |
|
|
+ (parsePtr->tokenPtr->numComponents + 1);
|
1346 |
|
|
/*
|
1347 |
|
|
* Check not only that the type is TCL_TOKEN_SIMPLE_WORD, but whether
|
1348 |
|
|
* curly braces surround the variable name.
|
1349 |
|
|
* This really matters for array elements to handle things like
|
1350 |
|
|
* set {x($foo)} 5
|
1351 |
|
|
* which raises an undefined var error if we are not careful here.
|
1352 |
|
|
* This goes with the hack in TclCompileSetCmd.
|
1353 |
|
|
*/
|
1354 |
|
|
if ((varTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) &&
|
1355 |
|
|
(varTokenPtr->start[0] != '{')) {
|
1356 |
|
|
/*
|
1357 |
|
|
* A simple variable name. Divide it up into "name" and "elName"
|
1358 |
|
|
* strings. If it is not a local variable, look it up at runtime.
|
1359 |
|
|
*/
|
1360 |
|
|
|
1361 |
|
|
name = varTokenPtr[1].start;
|
1362 |
|
|
nameChars = varTokenPtr[1].size;
|
1363 |
|
|
for (i = 0, p = name; i < nameChars; i++, p++) {
|
1364 |
|
|
if (*p == '(') {
|
1365 |
|
|
char *openParen = p;
|
1366 |
|
|
p = (name + nameChars-1);
|
1367 |
|
|
if (*p == ')') { /* last char is ')' => array reference */
|
1368 |
|
|
nameChars = (openParen - name);
|
1369 |
|
|
elName = openParen+1;
|
1370 |
|
|
elNameChars = (p - elName);
|
1371 |
|
|
}
|
1372 |
|
|
break;
|
1373 |
|
|
}
|
1374 |
|
|
}
|
1375 |
|
|
if (envPtr->procPtr != NULL) {
|
1376 |
|
|
localIndex = TclFindCompiledLocal(name, nameChars,
|
1377 |
|
|
/*create*/ 0, /*flags*/ 0, envPtr->procPtr);
|
1378 |
|
|
if (localIndex > 255) { /* we'll push the name */
|
1379 |
|
|
localIndex = -1;
|
1380 |
|
|
}
|
1381 |
|
|
}
|
1382 |
|
|
if (localIndex < 0) {
|
1383 |
|
|
TclEmitPush(TclRegisterLiteral(envPtr, name, nameChars,
|
1384 |
|
|
/*onHeap*/ 0), envPtr);
|
1385 |
|
|
maxDepth = 1;
|
1386 |
|
|
}
|
1387 |
|
|
|
1388 |
|
|
/*
|
1389 |
|
|
* Compile the element script, if any.
|
1390 |
|
|
*/
|
1391 |
|
|
|
1392 |
|
|
if (elName != NULL) {
|
1393 |
|
|
/*
|
1394 |
|
|
* Temporarily replace the '(' and ')' by '"'s.
|
1395 |
|
|
*/
|
1396 |
|
|
|
1397 |
|
|
*(elName-1) = '"';
|
1398 |
|
|
*(elName+elNameChars) = '"';
|
1399 |
|
|
code = Tcl_ParseCommand(interp, elName-1, elNameChars+2,
|
1400 |
|
|
/*nested*/ 0, &elemParse);
|
1401 |
|
|
*(elName-1) = '(';
|
1402 |
|
|
*(elName+elNameChars) = ')';
|
1403 |
|
|
gotElemParse = 1;
|
1404 |
|
|
if ((code != TCL_OK) || (elemParse.numWords > 1)) {
|
1405 |
|
|
sprintf(buffer, "\n (parsing index for array \"%.*s\")",
|
1406 |
|
|
TclMin(nameChars, 100), name);
|
1407 |
|
|
Tcl_AddObjErrorInfo(interp, buffer, -1);
|
1408 |
|
|
code = TCL_ERROR;
|
1409 |
|
|
goto done;
|
1410 |
|
|
} else if (elemParse.numWords == 1) {
|
1411 |
|
|
code = TclCompileTokens(interp, elemParse.tokenPtr+1,
|
1412 |
|
|
elemParse.tokenPtr->numComponents, envPtr);
|
1413 |
|
|
if (code != TCL_OK) {
|
1414 |
|
|
goto done;
|
1415 |
|
|
}
|
1416 |
|
|
maxDepth += envPtr->maxStackDepth;
|
1417 |
|
|
} else {
|
1418 |
|
|
TclEmitPush(TclRegisterLiteral(envPtr, "", 0,
|
1419 |
|
|
/*alreadyAlloced*/ 0), envPtr);
|
1420 |
|
|
maxDepth += 1;
|
1421 |
|
|
}
|
1422 |
|
|
}
|
1423 |
|
|
} else {
|
1424 |
|
|
/*
|
1425 |
|
|
* Not a simple variable name. Look it up at runtime.
|
1426 |
|
|
*/
|
1427 |
|
|
|
1428 |
|
|
code = TclCompileTokens(interp, varTokenPtr+1,
|
1429 |
|
|
varTokenPtr->numComponents, envPtr);
|
1430 |
|
|
if (code != TCL_OK) {
|
1431 |
|
|
goto done;
|
1432 |
|
|
}
|
1433 |
|
|
maxDepth = envPtr->maxStackDepth;
|
1434 |
|
|
}
|
1435 |
|
|
|
1436 |
|
|
/*
|
1437 |
|
|
* If an increment is given, push it, but see first if it's a small
|
1438 |
|
|
* integer.
|
1439 |
|
|
*/
|
1440 |
|
|
|
1441 |
|
|
haveImmValue = 0;
|
1442 |
|
|
immValue = 0;
|
1443 |
|
|
if (parsePtr->numWords == 3) {
|
1444 |
|
|
incrTokenPtr = varTokenPtr + (varTokenPtr->numComponents + 1);
|
1445 |
|
|
if (incrTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
|
1446 |
|
|
char *word = incrTokenPtr[1].start;
|
1447 |
|
|
int numBytes = incrTokenPtr[1].size;
|
1448 |
|
|
char savedChar = word[numBytes];
|
1449 |
|
|
long n;
|
1450 |
|
|
|
1451 |
|
|
/*
|
1452 |
|
|
* Note there is a danger that modifying the string could have
|
1453 |
|
|
* undesirable side effects. In this case, TclLooksLikeInt and
|
1454 |
|
|
* TclGetLong do not have any dependencies on shared strings so we
|
1455 |
|
|
* should be safe.
|
1456 |
|
|
*/
|
1457 |
|
|
|
1458 |
|
|
word[numBytes] = '\0';
|
1459 |
|
|
if (TclLooksLikeInt(word, numBytes)
|
1460 |
|
|
&& (TclGetLong((Tcl_Interp *) NULL, word, &n) == TCL_OK)) {
|
1461 |
|
|
if ((-127 <= n) && (n <= 127)) {
|
1462 |
|
|
haveImmValue = 1;
|
1463 |
|
|
immValue = n;
|
1464 |
|
|
}
|
1465 |
|
|
}
|
1466 |
|
|
word[numBytes] = savedChar;
|
1467 |
|
|
if (!haveImmValue) {
|
1468 |
|
|
TclEmitPush(TclRegisterLiteral(envPtr, word, numBytes,
|
1469 |
|
|
/*onHeap*/ 0), envPtr);
|
1470 |
|
|
maxDepth += 1;
|
1471 |
|
|
}
|
1472 |
|
|
} else {
|
1473 |
|
|
code = TclCompileTokens(interp, incrTokenPtr+1,
|
1474 |
|
|
incrTokenPtr->numComponents, envPtr);
|
1475 |
|
|
if (code != TCL_OK) {
|
1476 |
|
|
if (code == TCL_ERROR) {
|
1477 |
|
|
Tcl_AddObjErrorInfo(interp,
|
1478 |
|
|
"\n (increment expression)", -1);
|
1479 |
|
|
}
|
1480 |
|
|
goto done;
|
1481 |
|
|
}
|
1482 |
|
|
maxDepth += envPtr->maxStackDepth;
|
1483 |
|
|
}
|
1484 |
|
|
} else { /* no incr amount given so use 1 */
|
1485 |
|
|
haveImmValue = 1;
|
1486 |
|
|
immValue = 1;
|
1487 |
|
|
}
|
1488 |
|
|
|
1489 |
|
|
/*
|
1490 |
|
|
* Emit the instruction to increment the variable.
|
1491 |
|
|
*/
|
1492 |
|
|
|
1493 |
|
|
if (name != NULL) {
|
1494 |
|
|
if (elName == NULL) {
|
1495 |
|
|
if (localIndex >= 0) {
|
1496 |
|
|
if (haveImmValue) {
|
1497 |
|
|
TclEmitInstInt1(INST_INCR_SCALAR1_IMM, localIndex,
|
1498 |
|
|
envPtr);
|
1499 |
|
|
TclEmitInt1(immValue, envPtr);
|
1500 |
|
|
} else {
|
1501 |
|
|
TclEmitInstInt1(INST_INCR_SCALAR1, localIndex, envPtr);
|
1502 |
|
|
}
|
1503 |
|
|
} else {
|
1504 |
|
|
if (haveImmValue) {
|
1505 |
|
|
TclEmitInstInt1(INST_INCR_SCALAR_STK_IMM, immValue,
|
1506 |
|
|
envPtr);
|
1507 |
|
|
} else {
|
1508 |
|
|
TclEmitOpcode(INST_INCR_SCALAR_STK, envPtr);
|
1509 |
|
|
}
|
1510 |
|
|
}
|
1511 |
|
|
} else {
|
1512 |
|
|
if (localIndex >= 0) {
|
1513 |
|
|
if (haveImmValue) {
|
1514 |
|
|
TclEmitInstInt1(INST_INCR_ARRAY1_IMM, localIndex,
|
1515 |
|
|
envPtr);
|
1516 |
|
|
TclEmitInt1(immValue, envPtr);
|
1517 |
|
|
} else {
|
1518 |
|
|
TclEmitInstInt1(INST_INCR_ARRAY1, localIndex, envPtr);
|
1519 |
|
|
}
|
1520 |
|
|
} else {
|
1521 |
|
|
if (haveImmValue) {
|
1522 |
|
|
TclEmitInstInt1(INST_INCR_ARRAY_STK_IMM, immValue,
|
1523 |
|
|
envPtr);
|
1524 |
|
|
} else {
|
1525 |
|
|
TclEmitOpcode(INST_INCR_ARRAY_STK, envPtr);
|
1526 |
|
|
}
|
1527 |
|
|
}
|
1528 |
|
|
}
|
1529 |
|
|
} else { /* non-simple variable name */
|
1530 |
|
|
if (haveImmValue) {
|
1531 |
|
|
TclEmitInstInt1(INST_INCR_STK_IMM, immValue, envPtr);
|
1532 |
|
|
} else {
|
1533 |
|
|
TclEmitOpcode(INST_INCR_STK, envPtr);
|
1534 |
|
|
}
|
1535 |
|
|
}
|
1536 |
|
|
|
1537 |
|
|
done:
|
1538 |
|
|
if (gotElemParse) {
|
1539 |
|
|
Tcl_FreeParse(&elemParse);
|
1540 |
|
|
}
|
1541 |
|
|
envPtr->maxStackDepth = maxDepth;
|
1542 |
|
|
return code;
|
1543 |
|
|
}
|
1544 |
|
|
|
1545 |
|
|
/*
|
1546 |
|
|
*----------------------------------------------------------------------
|
1547 |
|
|
*
|
1548 |
|
|
* TclCompileSetCmd --
|
1549 |
|
|
*
|
1550 |
|
|
* Procedure called to compile the "set" command.
|
1551 |
|
|
*
|
1552 |
|
|
* Results:
|
1553 |
|
|
* The return value is a standard Tcl result, which is normally TCL_OK
|
1554 |
|
|
* unless there was an error while parsing string. If an error occurs
|
1555 |
|
|
* then the interpreter's result contains a standard error message. If
|
1556 |
|
|
* complation fails because the set command requires a second level of
|
1557 |
|
|
* substitutions, TCL_OUT_LINE_COMPILE is returned indicating that the
|
1558 |
|
|
* set command should be compiled "out of line" by emitting code to
|
1559 |
|
|
* invoke its command procedure (Tcl_SetCmd) at runtime.
|
1560 |
|
|
*
|
1561 |
|
|
* envPtr->maxStackDepth is updated with the maximum number of stack
|
1562 |
|
|
* elements needed to execute the incr command.
|
1563 |
|
|
*
|
1564 |
|
|
* Side effects:
|
1565 |
|
|
* Instructions are added to envPtr to execute the "set" command
|
1566 |
|
|
* at runtime.
|
1567 |
|
|
*
|
1568 |
|
|
*----------------------------------------------------------------------
|
1569 |
|
|
*/
|
1570 |
|
|
|
1571 |
|
|
int
|
1572 |
|
|
TclCompileSetCmd(interp, parsePtr, envPtr)
|
1573 |
|
|
Tcl_Interp *interp; /* Used for error reporting. */
|
1574 |
|
|
Tcl_Parse *parsePtr; /* Points to a parse structure for the
|
1575 |
|
|
* command created by Tcl_ParseCommand. */
|
1576 |
|
|
CompileEnv *envPtr; /* Holds resulting instructions. */
|
1577 |
|
|
{
|
1578 |
|
|
Tcl_Token *varTokenPtr, *valueTokenPtr;
|
1579 |
|
|
Tcl_Parse elemParse;
|
1580 |
|
|
int gotElemParse = 0;
|
1581 |
|
|
register char *p;
|
1582 |
|
|
char *name, *elName;
|
1583 |
|
|
int nameChars, elNameChars;
|
1584 |
|
|
register int i, n;
|
1585 |
|
|
int isAssignment, simpleVarName, localIndex, numWords;
|
1586 |
|
|
int maxDepth = 0;
|
1587 |
|
|
int code = TCL_OK;
|
1588 |
|
|
|
1589 |
|
|
envPtr->maxStackDepth = 0;
|
1590 |
|
|
numWords = parsePtr->numWords;
|
1591 |
|
|
if ((numWords != 2) && (numWords != 3)) {
|
1592 |
|
|
Tcl_ResetResult(interp);
|
1593 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
1594 |
|
|
"wrong # args: should be \"set varName ?newValue?\"", -1);
|
1595 |
|
|
return TCL_ERROR;
|
1596 |
|
|
}
|
1597 |
|
|
isAssignment = (numWords == 3);
|
1598 |
|
|
|
1599 |
|
|
/*
|
1600 |
|
|
* Decide if we can use a frame slot for the var/array name or if we
|
1601 |
|
|
* need to emit code to compute and push the name at runtime. We use a
|
1602 |
|
|
* frame slot (entry in the array of local vars) if we are compiling a
|
1603 |
|
|
* procedure body and if the name is simple text that does not include
|
1604 |
|
|
* namespace qualifiers.
|
1605 |
|
|
*/
|
1606 |
|
|
|
1607 |
|
|
simpleVarName = 0;
|
1608 |
|
|
name = elName = NULL;
|
1609 |
|
|
nameChars = elNameChars = 0;
|
1610 |
|
|
localIndex = -1;
|
1611 |
|
|
|
1612 |
|
|
varTokenPtr = parsePtr->tokenPtr
|
1613 |
|
|
+ (parsePtr->tokenPtr->numComponents + 1);
|
1614 |
|
|
/*
|
1615 |
|
|
* Check not only that the type is TCL_TOKEN_SIMPLE_WORD, but whether
|
1616 |
|
|
* curly braces surround the variable name.
|
1617 |
|
|
* This really matters for array elements to handle things like
|
1618 |
|
|
* set {x($foo)} 5
|
1619 |
|
|
* which raises an undefined var error if we are not careful here.
|
1620 |
|
|
* This goes with the hack in TclCompileIncrCmd.
|
1621 |
|
|
*/
|
1622 |
|
|
if ((varTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) &&
|
1623 |
|
|
(varTokenPtr->start[0] != '{')) {
|
1624 |
|
|
simpleVarName = 1;
|
1625 |
|
|
|
1626 |
|
|
name = varTokenPtr[1].start;
|
1627 |
|
|
nameChars = varTokenPtr[1].size;
|
1628 |
|
|
/* last char is ')' => potential array reference */
|
1629 |
|
|
if ( *(name + nameChars - 1) == ')') {
|
1630 |
|
|
for (i = 0, p = name; i < nameChars; i++, p++) {
|
1631 |
|
|
if (*p == '(') {
|
1632 |
|
|
elName = p + 1;
|
1633 |
|
|
elNameChars = nameChars - i - 2;
|
1634 |
|
|
nameChars = i ;
|
1635 |
|
|
break;
|
1636 |
|
|
}
|
1637 |
|
|
}
|
1638 |
|
|
}
|
1639 |
|
|
|
1640 |
|
|
/*
|
1641 |
|
|
* If elName contains any double quotes ("), we can't inline
|
1642 |
|
|
* compile the element script using the replace '()' by '"'
|
1643 |
|
|
* technique below.
|
1644 |
|
|
*/
|
1645 |
|
|
|
1646 |
|
|
for (i = 0, p = elName; i < elNameChars; i++, p++) {
|
1647 |
|
|
if (*p == '"') {
|
1648 |
|
|
simpleVarName = 0;
|
1649 |
|
|
break;
|
1650 |
|
|
}
|
1651 |
|
|
}
|
1652 |
|
|
} else if (((n = varTokenPtr->numComponents) > 1)
|
1653 |
|
|
&& (varTokenPtr[1].type == TCL_TOKEN_TEXT)
|
1654 |
|
|
&& (varTokenPtr[n].type == TCL_TOKEN_TEXT)
|
1655 |
|
|
&& (varTokenPtr[n].start[varTokenPtr[n].size - 1] == ')')) {
|
1656 |
|
|
simpleVarName = 0;
|
1657 |
|
|
|
1658 |
|
|
/*
|
1659 |
|
|
* Check for parentheses inside first token
|
1660 |
|
|
*/
|
1661 |
|
|
for (i = 0, p = varTokenPtr[1].start;
|
1662 |
|
|
i < varTokenPtr[1].size; i++, p++) {
|
1663 |
|
|
if (*p == '(') {
|
1664 |
|
|
simpleVarName = 1;
|
1665 |
|
|
break;
|
1666 |
|
|
}
|
1667 |
|
|
}
|
1668 |
|
|
if (simpleVarName) {
|
1669 |
|
|
name = varTokenPtr[1].start;
|
1670 |
|
|
nameChars = p - varTokenPtr[1].start;
|
1671 |
|
|
elName = p + 1;
|
1672 |
|
|
elNameChars = (varTokenPtr[n].start - p) + varTokenPtr[n].size - 2;
|
1673 |
|
|
|
1674 |
|
|
/*
|
1675 |
|
|
* If elName contains any double quotes ("), we can't inline
|
1676 |
|
|
* compile the element script using the replace '()' by '"'
|
1677 |
|
|
* technique below.
|
1678 |
|
|
*/
|
1679 |
|
|
|
1680 |
|
|
for (i = 0, p = elName; i < elNameChars; i++, p++) {
|
1681 |
|
|
if (*p == '"') {
|
1682 |
|
|
simpleVarName = 0;
|
1683 |
|
|
break;
|
1684 |
|
|
}
|
1685 |
|
|
}
|
1686 |
|
|
}
|
1687 |
|
|
}
|
1688 |
|
|
|
1689 |
|
|
if (simpleVarName) {
|
1690 |
|
|
/*
|
1691 |
|
|
* See whether name has any namespace separators (::'s).
|
1692 |
|
|
*/
|
1693 |
|
|
|
1694 |
|
|
int hasNsQualifiers = 0;
|
1695 |
|
|
for (i = 0, p = name; i < nameChars; i++, p++) {
|
1696 |
|
|
if ((*p == ':') && ((i+1) < nameChars) && (*(p+1) == ':')) {
|
1697 |
|
|
hasNsQualifiers = 1;
|
1698 |
|
|
break;
|
1699 |
|
|
}
|
1700 |
|
|
}
|
1701 |
|
|
|
1702 |
|
|
/*
|
1703 |
|
|
* Look up the var name's index in the array of local vars in the
|
1704 |
|
|
* proc frame. If retrieving the var's value and it doesn't already
|
1705 |
|
|
* exist, push its name and look it up at runtime.
|
1706 |
|
|
*/
|
1707 |
|
|
|
1708 |
|
|
if ((envPtr->procPtr != NULL) && !hasNsQualifiers) {
|
1709 |
|
|
localIndex = TclFindCompiledLocal(name, nameChars,
|
1710 |
|
|
/*create*/ isAssignment,
|
1711 |
|
|
/*flags*/ ((elName==NULL)? VAR_SCALAR : VAR_ARRAY),
|
1712 |
|
|
envPtr->procPtr);
|
1713 |
|
|
}
|
1714 |
|
|
if (localIndex >= 0) {
|
1715 |
|
|
maxDepth = 0;
|
1716 |
|
|
} else {
|
1717 |
|
|
TclEmitPush(TclRegisterLiteral(envPtr, name, nameChars,
|
1718 |
|
|
/*onHeap*/ 0), envPtr);
|
1719 |
|
|
maxDepth = 1;
|
1720 |
|
|
}
|
1721 |
|
|
|
1722 |
|
|
/*
|
1723 |
|
|
* Compile the element script, if any.
|
1724 |
|
|
*/
|
1725 |
|
|
|
1726 |
|
|
if (elName != NULL) {
|
1727 |
|
|
/*
|
1728 |
|
|
* Temporarily replace the '(' and ')' by '"'s.
|
1729 |
|
|
*/
|
1730 |
|
|
|
1731 |
|
|
*(elName-1) = '"';
|
1732 |
|
|
*(elName+elNameChars) = '"';
|
1733 |
|
|
code = Tcl_ParseCommand(interp, elName-1, elNameChars+2,
|
1734 |
|
|
/*nested*/ 0, &elemParse);
|
1735 |
|
|
*(elName-1) = '(';
|
1736 |
|
|
*(elName+elNameChars) = ')';
|
1737 |
|
|
gotElemParse = 1;
|
1738 |
|
|
if ((code != TCL_OK) || (elemParse.numWords > 1)) {
|
1739 |
|
|
char buffer[160];
|
1740 |
|
|
sprintf(buffer, "\n (parsing index for array \"%.*s\")",
|
1741 |
|
|
TclMin(nameChars, 100), name);
|
1742 |
|
|
Tcl_AddObjErrorInfo(interp, buffer, -1);
|
1743 |
|
|
code = TCL_ERROR;
|
1744 |
|
|
goto done;
|
1745 |
|
|
} else if (elemParse.numWords == 1) {
|
1746 |
|
|
code = TclCompileTokens(interp, elemParse.tokenPtr+1,
|
1747 |
|
|
elemParse.tokenPtr->numComponents, envPtr);
|
1748 |
|
|
if (code != TCL_OK) {
|
1749 |
|
|
goto done;
|
1750 |
|
|
}
|
1751 |
|
|
maxDepth += envPtr->maxStackDepth;
|
1752 |
|
|
} else {
|
1753 |
|
|
TclEmitPush(TclRegisterLiteral(envPtr, "", 0,
|
1754 |
|
|
/*alreadyAlloced*/ 0), envPtr);
|
1755 |
|
|
maxDepth += 1;
|
1756 |
|
|
}
|
1757 |
|
|
}
|
1758 |
|
|
} else {
|
1759 |
|
|
/*
|
1760 |
|
|
* The var name isn't simple: compile and push it.
|
1761 |
|
|
*/
|
1762 |
|
|
|
1763 |
|
|
code = TclCompileTokens(interp, varTokenPtr+1,
|
1764 |
|
|
varTokenPtr->numComponents, envPtr);
|
1765 |
|
|
if (code != TCL_OK) {
|
1766 |
|
|
goto done;
|
1767 |
|
|
}
|
1768 |
|
|
maxDepth += envPtr->maxStackDepth;
|
1769 |
|
|
}
|
1770 |
|
|
|
1771 |
|
|
/*
|
1772 |
|
|
* If we are doing an assignment, push the new value.
|
1773 |
|
|
*/
|
1774 |
|
|
|
1775 |
|
|
if (isAssignment) {
|
1776 |
|
|
valueTokenPtr = varTokenPtr + (varTokenPtr->numComponents + 1);
|
1777 |
|
|
if (valueTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
|
1778 |
|
|
TclEmitPush(TclRegisterLiteral(envPtr, valueTokenPtr[1].start,
|
1779 |
|
|
valueTokenPtr[1].size, /*onHeap*/ 0), envPtr);
|
1780 |
|
|
maxDepth += 1;
|
1781 |
|
|
} else {
|
1782 |
|
|
code = TclCompileTokens(interp, valueTokenPtr+1,
|
1783 |
|
|
valueTokenPtr->numComponents, envPtr);
|
1784 |
|
|
if (code != TCL_OK) {
|
1785 |
|
|
goto done;
|
1786 |
|
|
}
|
1787 |
|
|
maxDepth += envPtr->maxStackDepth;
|
1788 |
|
|
}
|
1789 |
|
|
}
|
1790 |
|
|
|
1791 |
|
|
/*
|
1792 |
|
|
* Emit instructions to set/get the variable.
|
1793 |
|
|
*/
|
1794 |
|
|
|
1795 |
|
|
if (simpleVarName) {
|
1796 |
|
|
if (elName == NULL) {
|
1797 |
|
|
if (localIndex >= 0) {
|
1798 |
|
|
if (localIndex <= 255) {
|
1799 |
|
|
TclEmitInstInt1((isAssignment?
|
1800 |
|
|
INST_STORE_SCALAR1 : INST_LOAD_SCALAR1),
|
1801 |
|
|
localIndex, envPtr);
|
1802 |
|
|
} else {
|
1803 |
|
|
TclEmitInstInt4((isAssignment?
|
1804 |
|
|
INST_STORE_SCALAR4 : INST_LOAD_SCALAR4),
|
1805 |
|
|
localIndex, envPtr);
|
1806 |
|
|
}
|
1807 |
|
|
} else {
|
1808 |
|
|
TclEmitOpcode((isAssignment?
|
1809 |
|
|
INST_STORE_SCALAR_STK : INST_LOAD_SCALAR_STK),
|
1810 |
|
|
envPtr);
|
1811 |
|
|
}
|
1812 |
|
|
} else {
|
1813 |
|
|
if (localIndex >= 0) {
|
1814 |
|
|
if (localIndex <= 255) {
|
1815 |
|
|
TclEmitInstInt1((isAssignment?
|
1816 |
|
|
INST_STORE_ARRAY1 : INST_LOAD_ARRAY1),
|
1817 |
|
|
localIndex, envPtr);
|
1818 |
|
|
} else {
|
1819 |
|
|
TclEmitInstInt4((isAssignment?
|
1820 |
|
|
INST_STORE_ARRAY4 : INST_LOAD_ARRAY4),
|
1821 |
|
|
localIndex, envPtr);
|
1822 |
|
|
}
|
1823 |
|
|
} else {
|
1824 |
|
|
TclEmitOpcode((isAssignment?
|
1825 |
|
|
INST_STORE_ARRAY_STK : INST_LOAD_ARRAY_STK),
|
1826 |
|
|
envPtr);
|
1827 |
|
|
}
|
1828 |
|
|
}
|
1829 |
|
|
} else {
|
1830 |
|
|
TclEmitOpcode((isAssignment? INST_STORE_STK : INST_LOAD_STK),
|
1831 |
|
|
envPtr);
|
1832 |
|
|
}
|
1833 |
|
|
|
1834 |
|
|
done:
|
1835 |
|
|
if (gotElemParse) {
|
1836 |
|
|
Tcl_FreeParse(&elemParse);
|
1837 |
|
|
}
|
1838 |
|
|
envPtr->maxStackDepth = maxDepth;
|
1839 |
|
|
return code;
|
1840 |
|
|
}
|
1841 |
|
|
|
1842 |
|
|
/*
|
1843 |
|
|
*----------------------------------------------------------------------
|
1844 |
|
|
*
|
1845 |
|
|
* TclCompileWhileCmd --
|
1846 |
|
|
*
|
1847 |
|
|
* Procedure called to compile the "while" command.
|
1848 |
|
|
*
|
1849 |
|
|
* Results:
|
1850 |
|
|
* The return value is a standard Tcl result, which is TCL_OK if
|
1851 |
|
|
* compilation was successful. If an error occurs then the
|
1852 |
|
|
* interpreter's result contains a standard error message and TCL_ERROR
|
1853 |
|
|
* is returned. If compilation failed because the command is too
|
1854 |
|
|
* complex for TclCompileWhileCmd, TCL_OUT_LINE_COMPILE is returned
|
1855 |
|
|
* indicating that the while command should be compiled "out of line"
|
1856 |
|
|
* by emitting code to invoke its command procedure at runtime.
|
1857 |
|
|
*
|
1858 |
|
|
* envPtr->maxStackDepth is updated with the maximum number of stack
|
1859 |
|
|
* elements needed to execute the "while" command.
|
1860 |
|
|
*
|
1861 |
|
|
* Side effects:
|
1862 |
|
|
* Instructions are added to envPtr to execute the "while" command
|
1863 |
|
|
* at runtime.
|
1864 |
|
|
*
|
1865 |
|
|
*----------------------------------------------------------------------
|
1866 |
|
|
*/
|
1867 |
|
|
|
1868 |
|
|
int
|
1869 |
|
|
TclCompileWhileCmd(interp, parsePtr, envPtr)
|
1870 |
|
|
Tcl_Interp *interp; /* Used for error reporting. */
|
1871 |
|
|
Tcl_Parse *parsePtr; /* Points to a parse structure for the
|
1872 |
|
|
* command created by Tcl_ParseCommand. */
|
1873 |
|
|
CompileEnv *envPtr; /* Holds resulting instructions. */
|
1874 |
|
|
{
|
1875 |
|
|
Tcl_Token *testTokenPtr, *bodyTokenPtr;
|
1876 |
|
|
JumpFixup jumpFalseFixup;
|
1877 |
|
|
unsigned char *jumpPc;
|
1878 |
|
|
int testCodeOffset, jumpDist, jumpBackDist, jumpBackOffset;
|
1879 |
|
|
int range, maxDepth, code;
|
1880 |
|
|
char buffer[32 + TCL_INTEGER_SPACE];
|
1881 |
|
|
|
1882 |
|
|
envPtr->maxStackDepth = 0;
|
1883 |
|
|
maxDepth = 0;
|
1884 |
|
|
if (parsePtr->numWords != 3) {
|
1885 |
|
|
Tcl_ResetResult(interp);
|
1886 |
|
|
Tcl_AppendToObj(Tcl_GetObjResult(interp),
|
1887 |
|
|
"wrong # args: should be \"while test command\"", -1);
|
1888 |
|
|
return TCL_ERROR;
|
1889 |
|
|
}
|
1890 |
|
|
|
1891 |
|
|
/*
|
1892 |
|
|
* If the test expression requires substitutions, don't compile the
|
1893 |
|
|
* while command inline. E.g., the expression might cause the loop to
|
1894 |
|
|
* never execute or execute forever, as in "while "$x < 5" {}".
|
1895 |
|
|
*/
|
1896 |
|
|
|
1897 |
|
|
testTokenPtr = parsePtr->tokenPtr
|
1898 |
|
|
+ (parsePtr->tokenPtr->numComponents + 1);
|
1899 |
|
|
if (testTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
|
1900 |
|
|
return TCL_OUT_LINE_COMPILE;
|
1901 |
|
|
}
|
1902 |
|
|
|
1903 |
|
|
/*
|
1904 |
|
|
* Create a ExceptionRange record for the loop body. This is used to
|
1905 |
|
|
* implement break and continue.
|
1906 |
|
|
*/
|
1907 |
|
|
|
1908 |
|
|
envPtr->exceptDepth++;
|
1909 |
|
|
envPtr->maxExceptDepth =
|
1910 |
|
|
TclMax(envPtr->exceptDepth, envPtr->maxExceptDepth);
|
1911 |
|
|
range = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr);
|
1912 |
|
|
envPtr->exceptArrayPtr[range].continueOffset =
|
1913 |
|
|
(envPtr->codeNext - envPtr->codeStart);
|
1914 |
|
|
|
1915 |
|
|
/*
|
1916 |
|
|
* Compile the test expression then emit the conditional jump that
|
1917 |
|
|
* terminates the while. We already know it's a simple word.
|
1918 |
|
|
*/
|
1919 |
|
|
|
1920 |
|
|
testCodeOffset = (envPtr->codeNext - envPtr->codeStart);
|
1921 |
|
|
envPtr->exceptArrayPtr[range].continueOffset = testCodeOffset;
|
1922 |
|
|
code = TclCompileExprWords(interp, testTokenPtr, 1, envPtr);
|
1923 |
|
|
if (code != TCL_OK) {
|
1924 |
|
|
if (code == TCL_ERROR) {
|
1925 |
|
|
Tcl_AddObjErrorInfo(interp,
|
1926 |
|
|
"\n (\"while\" test expression)", -1);
|
1927 |
|
|
}
|
1928 |
|
|
goto error;
|
1929 |
|
|
}
|
1930 |
|
|
maxDepth = envPtr->maxStackDepth;
|
1931 |
|
|
TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, &jumpFalseFixup);
|
1932 |
|
|
|
1933 |
|
|
/*
|
1934 |
|
|
* Compile the loop body.
|
1935 |
|
|
*/
|
1936 |
|
|
|
1937 |
|
|
bodyTokenPtr = testTokenPtr + (testTokenPtr->numComponents + 1);
|
1938 |
|
|
envPtr->exceptArrayPtr[range].codeOffset =
|
1939 |
|
|
(envPtr->codeNext - envPtr->codeStart);
|
1940 |
|
|
code = TclCompileCmdWord(interp, bodyTokenPtr+1,
|
1941 |
|
|
bodyTokenPtr->numComponents, envPtr);
|
1942 |
|
|
if (code != TCL_OK) {
|
1943 |
|
|
if (code == TCL_ERROR) {
|
1944 |
|
|
sprintf(buffer, "\n (\"while\" body line %d)",
|
1945 |
|
|
interp->errorLine);
|
1946 |
|
|
Tcl_AddObjErrorInfo(interp, buffer, -1);
|
1947 |
|
|
}
|
1948 |
|
|
goto error;
|
1949 |
|
|
}
|
1950 |
|
|
maxDepth = TclMax(envPtr->maxStackDepth, maxDepth);
|
1951 |
|
|
envPtr->exceptArrayPtr[range].numCodeBytes =
|
1952 |
|
|
(envPtr->codeNext - envPtr->codeStart)
|
1953 |
|
|
- envPtr->exceptArrayPtr[range].codeOffset;
|
1954 |
|
|
TclEmitOpcode(INST_POP, envPtr);
|
1955 |
|
|
|
1956 |
|
|
/*
|
1957 |
|
|
* Jump back to the test at the top of the loop. Generate a 4 byte jump
|
1958 |
|
|
* if the distance to the test is > 120 bytes. This is conservative and
|
1959 |
|
|
* ensures that we won't have to replace this jump if we later need to
|
1960 |
|
|
* replace the ifFalse jump with a 4 byte jump.
|
1961 |
|
|
*/
|
1962 |
|
|
|
1963 |
|
|
jumpBackOffset = (envPtr->codeNext - envPtr->codeStart);
|
1964 |
|
|
jumpBackDist = (jumpBackOffset - testCodeOffset);
|
1965 |
|
|
if (jumpBackDist > 120) {
|
1966 |
|
|
TclEmitInstInt4(INST_JUMP4, -jumpBackDist, envPtr);
|
1967 |
|
|
} else {
|
1968 |
|
|
TclEmitInstInt1(INST_JUMP1, -jumpBackDist, envPtr);
|
1969 |
|
|
}
|
1970 |
|
|
|
1971 |
|
|
/*
|
1972 |
|
|
* Fix the target of the jumpFalse after the test.
|
1973 |
|
|
*/
|
1974 |
|
|
|
1975 |
|
|
jumpDist = (envPtr->codeNext - envPtr->codeStart)
|
1976 |
|
|
- jumpFalseFixup.codeOffset;
|
1977 |
|
|
if (TclFixupForwardJump(envPtr, &jumpFalseFixup, jumpDist, 127)) {
|
1978 |
|
|
/*
|
1979 |
|
|
* Update the loop body's starting PC offset since it moved down.
|
1980 |
|
|
*/
|
1981 |
|
|
|
1982 |
|
|
envPtr->exceptArrayPtr[range].codeOffset += 3;
|
1983 |
|
|
|
1984 |
|
|
/*
|
1985 |
|
|
* Update the jump back to the test at the top of the loop since it
|
1986 |
|
|
* also moved down 3 bytes.
|
1987 |
|
|
*/
|
1988 |
|
|
|
1989 |
|
|
jumpBackOffset += 3;
|
1990 |
|
|
jumpPc = (envPtr->codeStart + jumpBackOffset);
|
1991 |
|
|
jumpBackDist += 3;
|
1992 |
|
|
if (jumpBackDist > 120) {
|
1993 |
|
|
TclUpdateInstInt4AtPc(INST_JUMP4, -jumpBackDist, jumpPc);
|
1994 |
|
|
} else {
|
1995 |
|
|
TclUpdateInstInt1AtPc(INST_JUMP1, -jumpBackDist, jumpPc);
|
1996 |
|
|
}
|
1997 |
|
|
}
|
1998 |
|
|
|
1999 |
|
|
/*
|
2000 |
|
|
* Set the loop's break target.
|
2001 |
|
|
*/
|
2002 |
|
|
|
2003 |
|
|
envPtr->exceptArrayPtr[range].breakOffset =
|
2004 |
|
|
(envPtr->codeNext - envPtr->codeStart);
|
2005 |
|
|
|
2006 |
|
|
/*
|
2007 |
|
|
* The while command's result is an empty string.
|
2008 |
|
|
*/
|
2009 |
|
|
|
2010 |
|
|
TclEmitPush(TclRegisterLiteral(envPtr, "", 0, /*onHeap*/ 0), envPtr);
|
2011 |
|
|
if (maxDepth == 0) {
|
2012 |
|
|
maxDepth = 1;
|
2013 |
|
|
}
|
2014 |
|
|
envPtr->maxStackDepth = maxDepth;
|
2015 |
|
|
envPtr->exceptDepth--;
|
2016 |
|
|
return TCL_OK;
|
2017 |
|
|
|
2018 |
|
|
error:
|
2019 |
|
|
envPtr->maxStackDepth = maxDepth;
|
2020 |
|
|
envPtr->exceptDepth--;
|
2021 |
|
|
return code;
|
2022 |
|
|
}
|
2023 |
|
|
|
2024 |
|
|
|
2025 |
|
|
/* $History: tclcompcmds.c $
|
2026 |
|
|
*
|
2027 |
|
|
* ***************** Version 1 *****************
|
2028 |
|
|
* User: Dtashley Date: 1/02/01 Time: 1:28a
|
2029 |
|
|
* Created in $/IjuScripter, IjuConsole/Source/Tcl Base
|
2030 |
|
|
* Initial check-in.
|
2031 |
|
|
*/
|
2032 |
|
|
|
2033 |
|
|
/* End of TCLCOMPCMDS.C */ |