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/* $Header$ */ |
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/* |
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* tclMain.c -- |
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* |
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* Main program for Tcl shells and other Tcl-based applications. |
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* |
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* Copyright (c) 1988-1994 The Regents of the University of California. |
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* Copyright (c) 1994-1997 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: tclmain.c,v 1.2 2001/10/07 01:32:29 dtashley Exp $ |
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*/ |
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|
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#define MODULE_TCLMAIN |
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|
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#include "tclmain.h" |
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|
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#include "tcl.h" |
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#include "tclInt.h" |
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|
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#include "build_config.h" |
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#include "extninit.h" |
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#include "msgstrs.h" |
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|
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|
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# undef TCL_STORAGE_CLASS |
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# define TCL_STORAGE_CLASS DLLEXPORT |
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|
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/* |
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* The following code ensures that tclLink.c is linked whenever |
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* Tcl is linked. Without this code there's no reference to the |
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* code in that file from anywhere in Tcl, so it may not be |
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* linked into the application. |
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*/ |
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|
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EXTERN int Tcl_LinkVar(); |
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int (*tclDummyLinkVarPtr)() = Tcl_LinkVar; |
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|
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/* |
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* Declarations for various library procedures and variables (don't want |
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* to include tclPort.h here, because people might copy this file out of |
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* the Tcl source directory to make their own modified versions). |
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* Note: "exit" should really be declared here, but there's no way to |
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* declare it without causing conflicts with other definitions elsewher |
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* on some systems, so it's better just to leave it out. |
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*/ |
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|
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extern int isatty _ANSI_ARGS_((int fd)); |
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extern char * strcpy _ANSI_ARGS_((char *dst, CONST char *src)); |
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|
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static char *tclStartupScriptFileName = NULL; |
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|
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|
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|
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|
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/* |
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*---------------------------------------------------------------------- |
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* |
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* TclSetStartupScriptFileName -- |
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* |
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* Primes the startup script file name, used to override the |
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* command line processing. |
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* |
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* Results: |
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* None. |
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* |
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* Side effects: |
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* This procedure initializes the file name of the Tcl script to |
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* run at startup. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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void TclSetStartupScriptFileName(fileName) |
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char *fileName; |
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{ |
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tclStartupScriptFileName = fileName; |
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} |
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|
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|
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/* |
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*---------------------------------------------------------------------- |
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* |
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* TclGetStartupScriptFileName -- |
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* |
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* Gets the startup script file name, used to override the |
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* command line processing. |
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* |
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* Results: |
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* The startup script file name, NULL if none has been set. |
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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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char *TclGetStartupScriptFileName() |
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{ |
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return tclStartupScriptFileName; |
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} |
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|
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|
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|
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/* |
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*---------------------------------------------------------------------- |
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* |
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* Tcl_Main -- |
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* |
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* Main program for tclsh and most other Tcl-based applications. |
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* |
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* Results: |
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* None. This procedure never returns (it exits the process when |
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* it's done. |
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* |
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* Side effects: |
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* This procedure initializes the Tcl world and then starts |
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* interpreting commands; almost anything could happen, depending |
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* on the script being interpreted. |
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* |
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*---------------------------------------------------------------------- |
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*/ |
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|
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void |
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Tcl_Main(argc, argv, appInitProc) |
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int argc; /* Number of arguments. */ |
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char **argv; /* Array of argument strings. */ |
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Tcl_AppInitProc *appInitProc; |
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/* Application-specific initialization |
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* procedure to call after most |
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* initialization but before starting to |
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* execute commands. */ |
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{ |
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Tcl_Obj *resultPtr; |
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Tcl_Obj *commandPtr = NULL; |
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char buffer[1000], *args; |
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int code, gotPartial, tty, length; |
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int exitCode = 0; |
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Tcl_Channel inChannel, outChannel, errChannel; |
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Tcl_Interp *interp; |
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Tcl_DString argString; |
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|
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Tcl_FindExecutable(argv[0]); |
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interp = Tcl_CreateInterp(); |
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#ifdef TCL_MEM_DEBUG |
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Tcl_InitMemory(interp); |
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#endif |
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|
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/* |
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* Make command-line arguments available in the Tcl variables "argc" |
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* and "argv". If the first argument doesn't start with a "-" then |
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* strip it off and use it as the name of a script file to process. |
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*/ |
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|
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if (tclStartupScriptFileName == NULL) { |
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if ((argc > 1) && (argv[1][0] != '-')) { |
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tclStartupScriptFileName = argv[1]; |
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argc--; |
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argv++; |
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} |
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} |
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args = Tcl_Merge(argc-1, argv+1); |
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Tcl_ExternalToUtfDString(NULL, args, -1, &argString); |
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Tcl_SetVar(interp, "argv", Tcl_DStringValue(&argString), TCL_GLOBAL_ONLY); |
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Tcl_DStringFree(&argString); |
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ckfree(args); |
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|
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if (tclStartupScriptFileName == NULL) { |
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Tcl_ExternalToUtfDString(NULL, argv[0], -1, &argString); |
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} else { |
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tclStartupScriptFileName = Tcl_ExternalToUtfDString(NULL, |
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tclStartupScriptFileName, -1, &argString); |
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} |
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|
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TclFormatInt(buffer, argc-1); |
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Tcl_SetVar(interp, "argc", buffer, TCL_GLOBAL_ONLY); |
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Tcl_SetVar(interp, "argv0", Tcl_DStringValue(&argString), TCL_GLOBAL_ONLY); |
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|
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/* |
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* Set the "tcl_interactive" variable. |
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*/ |
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|
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tty = isatty(0); |
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Tcl_SetVar(interp, "tcl_interactive", |
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((tclStartupScriptFileName == NULL) && tty) ? "1" : "0", |
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TCL_GLOBAL_ONLY); |
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|
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/* |
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* Invoke application-specific initialization. |
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*/ |
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|
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/* Register any extensions that should be registered for the |
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** executable currently being built. |
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*/ |
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ExtninitInit(interp); |
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|
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/* Set a Tcl variable to indicate the particular product |
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** we are building. This is used in the startup message script |
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** to announce product version, and may be used other |
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** places, as well. |
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*/ |
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Tcl_SetVar(interp, |
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BUILD_CONFIG_PRODUCT_NAME_VARIABLE, |
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BUILD_CONFIG_STATIC_TCLSH_ALIAS, |
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TCL_GLOBAL_ONLY); |
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|
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/* Set Tcl variable to indicate the relese version of the |
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** product we are building. This is used in the startup message script |
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** to announce product version, and may be used other |
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** places, as well. |
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*/ |
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Tcl_SetVar(interp, |
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BUILD_CONFIG_PRODUCT_VERSION_VARIABLE, |
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BUILD_CONFIG_RELEASE_VERSION, |
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TCL_GLOBAL_ONLY); |
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|
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/* Output the introductory message to the console. |
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** The script called is generic and applies to both |
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** IjuScripter and IjuConsole. |
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*/ |
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Tcl_GlobalEval(interp, BUILD_CONFIG_StartupMessageScript); |
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|
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/* |
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* If a script file was specified then just source that file |
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* and quit. |
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*/ |
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|
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if (tclStartupScriptFileName != NULL) { |
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code = Tcl_EvalFile(interp, tclStartupScriptFileName); |
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if (code != TCL_OK) { |
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errChannel = Tcl_GetStdChannel(TCL_STDERR); |
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if (errChannel) { |
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/* |
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* The following statement guarantees that the errorInfo |
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* variable is set properly. |
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*/ |
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|
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Tcl_AddErrorInfo(interp, ""); |
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Tcl_WriteObj(errChannel, Tcl_GetVar2Ex(interp, "errorInfo", |
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NULL, TCL_GLOBAL_ONLY)); |
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Tcl_WriteChars(errChannel, "\n", 1); |
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} |
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exitCode = 1; |
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} |
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goto done; |
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} |
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Tcl_DStringFree(&argString); |
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|
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/* |
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* We're running interactively. Source a user-specific startup |
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* file if the application specified one and if the file exists. |
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*/ |
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|
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Tcl_SourceRCFile(interp); |
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|
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/* |
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* Process commands from stdin until there's an end-of-file. Note |
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* that we need to fetch the standard channels again after every |
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* eval, since they may have been changed. |
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*/ |
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|
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commandPtr = Tcl_NewObj(); |
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Tcl_IncrRefCount(commandPtr); |
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|
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inChannel = Tcl_GetStdChannel(TCL_STDIN); |
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outChannel = Tcl_GetStdChannel(TCL_STDOUT); |
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gotPartial = 0; |
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while (1) { |
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if (tty) { |
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Tcl_Obj *promptCmdPtr; |
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|
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promptCmdPtr = Tcl_GetVar2Ex(interp, |
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(gotPartial ? "tcl_prompt2" : "tcl_prompt1"), |
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NULL, TCL_GLOBAL_ONLY); |
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if (promptCmdPtr == NULL) { |
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defaultPrompt: |
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if (!gotPartial && outChannel) { |
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Tcl_WriteChars(outChannel, "% ", 2); |
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} |
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} else { |
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code = Tcl_EvalObjEx(interp, promptCmdPtr, 0); |
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inChannel = Tcl_GetStdChannel(TCL_STDIN); |
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outChannel = Tcl_GetStdChannel(TCL_STDOUT); |
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errChannel = Tcl_GetStdChannel(TCL_STDERR); |
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if (code != TCL_OK) { |
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if (errChannel) { |
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Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp)); |
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Tcl_WriteChars(errChannel, "\n", 1); |
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} |
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Tcl_AddErrorInfo(interp, |
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"\n (script that generates prompt)"); |
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goto defaultPrompt; |
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} |
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} |
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if (outChannel) { |
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Tcl_Flush(outChannel); |
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} |
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} |
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if (!inChannel) { |
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goto done; |
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} |
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length = Tcl_GetsObj(inChannel, commandPtr); |
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if (length < 0) { |
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goto done; |
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} |
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if ((length == 0) && Tcl_Eof(inChannel) && (!gotPartial)) { |
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goto done; |
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} |
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|
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/* |
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* Add the newline removed by Tcl_GetsObj back to the string. |
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*/ |
| 313 |
|
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Tcl_AppendToObj(commandPtr, "\n", 1); |
| 315 |
if (!TclObjCommandComplete(commandPtr)) { |
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gotPartial = 1; |
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continue; |
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} |
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|
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gotPartial = 0; |
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code = Tcl_RecordAndEvalObj(interp, commandPtr, 0); |
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inChannel = Tcl_GetStdChannel(TCL_STDIN); |
| 323 |
outChannel = Tcl_GetStdChannel(TCL_STDOUT); |
| 324 |
errChannel = Tcl_GetStdChannel(TCL_STDERR); |
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Tcl_DecrRefCount(commandPtr); |
| 326 |
commandPtr = Tcl_NewObj(); |
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Tcl_IncrRefCount(commandPtr); |
| 328 |
if (code != TCL_OK) { |
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if (errChannel) { |
| 330 |
Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp)); |
| 331 |
Tcl_WriteChars(errChannel, "\n", 1); |
| 332 |
} |
| 333 |
} else if (tty) { |
| 334 |
resultPtr = Tcl_GetObjResult(interp); |
| 335 |
Tcl_GetStringFromObj(resultPtr, &length); |
| 336 |
if ((length > 0) && outChannel) { |
| 337 |
Tcl_WriteObj(outChannel, resultPtr); |
| 338 |
Tcl_WriteChars(outChannel, "\n", 1); |
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} |
| 340 |
} |
| 341 |
#ifdef TCL_MEM_DEBUG |
| 342 |
if (tclMemDumpFileName != NULL) { |
| 343 |
Tcl_DecrRefCount(commandPtr); |
| 344 |
Tcl_DeleteInterp(interp); |
| 345 |
Tcl_Exit(0); |
| 346 |
} |
| 347 |
#endif |
| 348 |
} |
| 349 |
|
| 350 |
/* |
| 351 |
* Rather than calling exit, invoke the "exit" command so that |
| 352 |
* users can replace "exit" with some other command to do additional |
| 353 |
* cleanup on exit. The Tcl_Eval call should never return. |
| 354 |
*/ |
| 355 |
|
| 356 |
done: |
| 357 |
if (commandPtr != NULL) { |
| 358 |
Tcl_DecrRefCount(commandPtr); |
| 359 |
} |
| 360 |
sprintf(buffer, "exit %d", exitCode); |
| 361 |
Tcl_Eval(interp, buffer); |
| 362 |
} |
| 363 |
|
| 364 |
|
| 365 |
const char *TclMainCversion(void) |
| 366 |
{ |
| 367 |
return ("$Header$"); |
| 368 |
} |
| 369 |
|
| 370 |
|
| 371 |
const char *TclMainHversion(void) |
| 372 |
{ |
| 373 |
return (TCLMAIN_H_VERSION); |
| 374 |
} |
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|
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/* End of tclmain.c */ |
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