author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 16:57:14 +0300 | |
branch | RCL_3 |
changeset 23 | 26645d81f48d |
parent 0 | 08ec8eefde2f |
permissions | -rw-r--r-- |
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/* |
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* tclTestProcBodyObj.c -- |
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* |
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* Implements the "procbodytest" package, which contains commands |
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* to test creation of Tcl procedures whose body argument is a |
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* Tcl_Obj of type "procbody" rather than a string. |
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* |
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* Copyright (c) 1998 by Scriptics Corporation. |
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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: tclTestProcBodyObj.c,v 1.2 1998/11/10 06:54:44 jingham Exp $ |
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*/ |
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#include "tclInt.h" |
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/* |
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* name and version of this package |
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*/ |
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static char packageName[] = "procbodytest"; |
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static char packageVersion[] = "1.0"; |
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/* |
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* Name of the commands exported by this package |
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*/ |
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static char procCommand[] = "proc"; |
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/* |
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* this struct describes an entry in the table of command names and command |
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* procs |
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*/ |
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typedef struct CmdTable |
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{ |
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char *cmdName; /* command name */ |
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Tcl_ObjCmdProc *proc; /* command proc */ |
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int exportIt; /* if 1, export the command */ |
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} CmdTable; |
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/* |
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* Declarations for functions defined in this file. |
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*/ |
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static int ProcBodyTestProcObjCmd _ANSI_ARGS_((ClientData dummy, |
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Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); |
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static int ProcBodyTestInitInternal _ANSI_ARGS_((Tcl_Interp *interp, |
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int isSafe)); |
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static int RegisterCommand _ANSI_ARGS_((Tcl_Interp* interp, |
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char *namespace, CONST CmdTable *cmdTablePtr)); |
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int Procbodytest_Init _ANSI_ARGS_((Tcl_Interp * interp)); |
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int Procbodytest_SafeInit _ANSI_ARGS_((Tcl_Interp * interp)); |
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/* |
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* List of commands to create when the package is loaded; must go after the |
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* declarations of the enable command procedure. |
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*/ |
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static CONST CmdTable commands[] = |
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{ |
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{ procCommand, ProcBodyTestProcObjCmd, 1 }, |
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{ 0, 0, 0 } |
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}; |
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static CONST CmdTable safeCommands[] = |
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{ |
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{ procCommand, ProcBodyTestProcObjCmd, 1 }, |
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{ 0, 0, 0 } |
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}; |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Procbodytest_Init -- |
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* |
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* This procedure initializes the "procbodytest" package. |
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* |
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* Results: |
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* A standard Tcl result. |
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* |
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* Side effects: |
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* None. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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int |
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Procbodytest_Init(interp) |
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Tcl_Interp *interp; /* the Tcl interpreter for which the package |
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* is initialized */ |
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{ |
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return ProcBodyTestInitInternal(interp, 0); |
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} |
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Procbodytest_SafeInit -- |
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* |
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* This procedure initializes the "procbodytest" package. |
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* |
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* Results: |
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* A standard Tcl result. |
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108 |
* |
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* Side effects: |
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* None. |
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111 |
* |
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112 |
*---------------------------------------------------------------------- |
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113 |
*/ |
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114 |
|
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115 |
int |
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116 |
Procbodytest_SafeInit(interp) |
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Tcl_Interp *interp; /* the Tcl interpreter for which the package |
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* is initialized */ |
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119 |
{ |
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return ProcBodyTestInitInternal(interp, 1); |
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121 |
} |
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122 |
|
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123 |
/* |
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124 |
*---------------------------------------------------------------------- |
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125 |
* |
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* RegisterCommand -- |
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127 |
* |
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* This procedure registers a command in the context of the given namespace. |
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129 |
* |
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130 |
* Results: |
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* A standard Tcl result. |
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132 |
* |
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133 |
* Side effects: |
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134 |
* None. |
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135 |
* |
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136 |
*---------------------------------------------------------------------- |
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137 |
*/ |
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138 |
|
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static int RegisterCommand(interp, namespace, cmdTablePtr) |
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Tcl_Interp* interp; /* the Tcl interpreter for which the |
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* operation is performed */ |
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142 |
char *namespace; /* the namespace in which the command |
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* is registered */ |
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CONST CmdTable *cmdTablePtr; /* the command to register */ |
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145 |
{ |
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146 |
char buf[128]; |
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147 |
|
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if (cmdTablePtr->exportIt) { |
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sprintf(buf, "namespace eval %s { namespace export %s }", |
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namespace, cmdTablePtr->cmdName); |
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if (Tcl_Eval(interp, buf) != TCL_OK) |
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return TCL_ERROR; |
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153 |
} |
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154 |
|
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sprintf(buf, "%s::%s", namespace, cmdTablePtr->cmdName); |
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Tcl_CreateObjCommand(interp, buf, cmdTablePtr->proc, 0, 0); |
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157 |
|
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158 |
return TCL_OK; |
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159 |
} |
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160 |
|
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161 |
/* |
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162 |
*---------------------------------------------------------------------- |
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163 |
* |
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164 |
* ProcBodyTestInitInternal -- |
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165 |
* |
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* This procedure initializes the Loader package. |
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167 |
* The isSafe flag is 1 if the interpreter is safe, 0 otherwise. |
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168 |
* |
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169 |
* Results: |
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* A standard Tcl result. |
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171 |
* |
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172 |
* Side effects: |
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173 |
* None. |
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174 |
* |
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175 |
*---------------------------------------------------------------------- |
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176 |
*/ |
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177 |
|
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178 |
static int |
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179 |
ProcBodyTestInitInternal(interp, isSafe) |
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Tcl_Interp *interp; /* the Tcl interpreter for which the package |
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* is initialized */ |
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182 |
int isSafe; /* 1 if this is a safe interpreter */ |
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183 |
{ |
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184 |
CONST CmdTable *cmdTablePtr; |
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185 |
|
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cmdTablePtr = (isSafe) ? &safeCommands[0] : &commands[0]; |
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for ( ; cmdTablePtr->cmdName ; cmdTablePtr++) { |
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if (RegisterCommand(interp, packageName, cmdTablePtr) != TCL_OK) { |
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189 |
return TCL_ERROR; |
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190 |
} |
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191 |
} |
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192 |
|
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193 |
return Tcl_PkgProvide(interp, packageName, packageVersion); |
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194 |
} |
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195 |
|
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196 |
/* |
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197 |
*---------------------------------------------------------------------- |
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198 |
* |
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199 |
* ProcBodyTestProcObjCmd -- |
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200 |
* |
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201 |
* Implements the "procbodytest::proc" command. Here is the command |
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202 |
* description: |
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* procbodytest::proc newName argList bodyName |
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* Looks up a procedure called $bodyName and, if the procedure exists, |
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* constructs a Tcl_Obj of type "procbody" and calls Tcl_ProcObjCmd. |
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* Arguments: |
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* newName the name of the procedure to be created |
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* argList the argument list for the procedure |
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* bodyName the name of an existing procedure from which the |
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* body is to be copied. |
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211 |
* This command can be used to trigger the branches in Tcl_ProcObjCmd that |
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* construct a proc from a "procbody", for example: |
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* proc a {x} {return $x} |
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* a 123 |
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* procbodytest::proc b {x} a |
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* Note the call to "a 123", which is necessary so that the Proc pointer |
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* for "a" is filled in by the internal compiler; this is a hack. |
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218 |
* |
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219 |
* Results: |
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* Returns a standard Tcl code. |
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221 |
* |
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222 |
* Side effects: |
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223 |
* A new procedure is created. |
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* Leaves an error message in the interp's result on error. |
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225 |
* |
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226 |
*---------------------------------------------------------------------- |
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227 |
*/ |
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228 |
|
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229 |
static int |
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230 |
ProcBodyTestProcObjCmd (dummy, interp, objc, objv) |
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231 |
ClientData dummy; /* context; not used */ |
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232 |
Tcl_Interp *interp; /* the current interpreter */ |
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233 |
int objc; /* argument count */ |
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Tcl_Obj *CONST objv[]; /* arguments */ |
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235 |
{ |
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236 |
char *fullName; |
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237 |
Tcl_Command procCmd; |
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Command *cmdPtr; |
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Proc *procPtr = (Proc *) NULL; |
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240 |
Tcl_Obj *bodyObjPtr; |
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241 |
Tcl_Obj *myobjv[5]; |
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242 |
int result; |
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243 |
|
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244 |
if (objc != 4) { |
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245 |
Tcl_WrongNumArgs(interp, 1, objv, "newName argsList bodyName"); |
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246 |
return TCL_ERROR; |
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247 |
} |
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248 |
|
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249 |
/* |
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250 |
* Find the Command pointer to this procedure |
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251 |
*/ |
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252 |
|
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253 |
fullName = Tcl_GetStringFromObj(objv[3], (int *) NULL); |
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254 |
procCmd = Tcl_FindCommand(interp, fullName, (Tcl_Namespace *) NULL, |
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255 |
TCL_LEAVE_ERR_MSG); |
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256 |
if (procCmd == NULL) { |
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257 |
return TCL_ERROR; |
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258 |
} |
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259 |
|
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260 |
cmdPtr = (Command *) procCmd; |
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261 |
|
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262 |
/* |
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263 |
* check that this is a procedure and not a builtin command: |
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264 |
* If a procedure, cmdPtr->objProc is either 0 or TclObjInterpProc, |
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265 |
* and cmdPtr->proc is either 0 or TclProcInterpProc. |
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266 |
* Also, the compile proc should be 0, but we don't check for that. |
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267 |
*/ |
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268 |
|
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269 |
if (((cmdPtr->objProc != NULL) |
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&& (cmdPtr->objProc != TclGetObjInterpProc())) |
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271 |
|| ((cmdPtr->proc != NULL) |
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272 |
&& (cmdPtr->proc != TclGetInterpProc()))) { |
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273 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
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274 |
"command \"", fullName, |
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"\" is not a Tcl procedure", (char *) NULL); |
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276 |
return TCL_ERROR; |
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277 |
} |
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278 |
|
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279 |
/* |
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280 |
* it is a Tcl procedure: the client data is the Proc structure |
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281 |
*/ |
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282 |
|
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283 |
if (cmdPtr->objProc != NULL) { |
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284 |
procPtr = (Proc *) cmdPtr->objClientData; |
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285 |
} else if (cmdPtr->proc != NULL) { |
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procPtr = (Proc *) cmdPtr->clientData; |
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287 |
} |
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288 |
|
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289 |
if (procPtr == NULL) { |
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290 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
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291 |
"procedure \"", fullName, |
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292 |
"\" does not have a Proc struct!", (char *) NULL); |
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293 |
return TCL_ERROR; |
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294 |
} |
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295 |
|
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296 |
/* |
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297 |
* create a new object, initialize our argument vector, call into Tcl |
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298 |
*/ |
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299 |
|
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300 |
bodyObjPtr = TclNewProcBodyObj(procPtr); |
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301 |
if (bodyObjPtr == NULL) { |
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302 |
Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), |
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303 |
"failed to create a procbody object for procedure \"", |
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304 |
fullName, "\"", (char *) NULL); |
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305 |
return TCL_ERROR; |
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306 |
} |
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307 |
Tcl_IncrRefCount(bodyObjPtr); |
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308 |
|
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309 |
myobjv[0] = objv[0]; |
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myobjv[1] = objv[1]; |
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myobjv[2] = objv[2]; |
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myobjv[3] = bodyObjPtr; |
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myobjv[4] = (Tcl_Obj *) NULL; |
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314 |
|
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Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
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315 |
result = Tcl_ProcObjCmd((ClientData) NULL, interp, objc, myobjv); |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
316 |
Tcl_DecrRefCount(bodyObjPtr); |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
317 |
|
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
318 |
return result; |
08ec8eefde2f
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff
changeset
|
319 |
} |