cpython-source-deps/unix/tkAppInit.c at tk · python/cpython-source-deps · GitHub

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* tkAppInit.c --

* Provides a default version of the main program and Tcl_AppInit

* procedure for wish and other Tk-based applications.

* See the file "license.terms" for information on usage and redistribution of

* this file, and for a DISCLAIMER OF ALL WARRANTIES.

* Explanation on following undef USE_TCL_STUBS by JN 2023-12-19 on the core list:

* What's going on is related to TIP #596:

* Stubs support for Embedding Tcl in other applications

* If an application using Tcl_Main() is compiled with USE_TCL_STUBS,

* Tcl_Main() will be replaced by a stub function, which loads

* libtcl9.0.so/tcl90.dll and then calls its Tcl_MainEx(). If

* libtcl9.0.so/tcl90.dll is not present (at runtime), a crash is what happens.

* So ... tkAppInit.c should not be compiled with USE_TCL_STUBS

* (unless you want to use the TIP #596 functionality)

* The proper solution is to make sure that Makefile.in doesn't use

* TCL_USE_STUBS when compiling tkAppInit.c. But that's a

* quite big re-organization just before a b1 release. Simpler

* is just to #undef'ine USE_TCL_STUBS, it has the same effect.

#undef USE_TCL_STUBS

#undef BUILD_tk

#undef STATIC_BUILD

#include "tk.h"

#include "tkPort.h"

#if (TCL_MAJOR_VERSION < 9)

# define Tcl_LibraryInitProc Tcl_PackageInitProc

# define Tcl_StaticLibrary Tcl_StaticPackage

#endif

#ifdef TK_TEST

#ifdef __cplusplus

extern "C" {

#endif

extern Tcl_LibraryInitProc Tktest_Init;

#ifdef __cplusplus

}

#endif

#endif /* TK_TEST */

* The following #if block allows you to change the AppInit function by using

* a #define of TCL_LOCAL_APPINIT instead of rewriting this entire file. The

* #if checks for that #define and uses Tcl_AppInit if it doesn't exist.

#ifndef TK_LOCAL_APPINIT

#define TK_LOCAL_APPINIT Tcl_AppInit

#endif

#ifndef MODULE_SCOPE

# ifdef __cplusplus

# define MODULE_SCOPE extern "C"

# else

# define MODULE_SCOPE extern

# endif

#endif

MODULE_SCOPE int TK_LOCAL_APPINIT(Tcl_Interp *);

MODULE_SCOPE int main(int, char **);

* The following #if block allows you to change how Tcl finds the startup

* script, prime the library or encoding paths, fiddle with the argv, etc.,

* without needing to rewrite Tk_Main()

#ifdef TK_LOCAL_MAIN_HOOK

MODULE_SCOPE int TK_LOCAL_MAIN_HOOK(int *argc, char ***argv);

#endif

/* Make sure the stubbed variants of those are never used. */

#undef Tcl_ObjSetVar2

#undef Tcl_NewStringObj

*----------------------------------------------------------------------

* main --

* This is the main program for the application.

* Results:

* None: Tk_Main never returns here, so this procedure never returns

* either.

* Side effects:

* Just about anything, since from here we call arbitrary Tcl code.

*----------------------------------------------------------------------

int

main(

int argc, /* Number of command-line arguments. */

char **argv) /* Values of command-line arguments. */

{

#ifdef TK_LOCAL_MAIN_HOOK

TK_LOCAL_MAIN_HOOK(&argc, &argv);

#elif TCL_MAJOR_VERSION > 8

/* This doesn't work with Tcl 8.6 */

TclZipfs_AppHook(&argc, &argv);

#endif

Tk_Main(argc, argv, TK_LOCAL_APPINIT);

return 0; /* Needed only to prevent compiler warning. */

}

*----------------------------------------------------------------------

* Tcl_AppInit --

* This procedure performs application-specific initialization. Most

* applications, especially those that incorporate additional packages,

* will have their own version of this procedure.

* Results:

* Returns a standard Tcl completion code, and leaves an error message in

* the interp's result if an error occurs.

* Side effects:

* Depends on the startup script.

*----------------------------------------------------------------------

int

Tcl_AppInit(

Tcl_Interp *interp) /* Interpreter for application. */

{

if ((Tcl_Init)(interp) == TCL_ERROR) {

return TCL_ERROR;

}

if (Tk_Init(interp) == TCL_ERROR) {

return TCL_ERROR;

}

Tcl_StaticLibrary(interp, "Tk", Tk_Init, Tk_SafeInit);

#if defined(USE_CUSTOM_EXIT_PROC)

if (TkpWantsExitProc()) {

Tcl_SetExitProc(TkpExitProc);

}

#endif

#ifdef TK_TEST

if (Tktest_Init(interp) == TCL_ERROR) {

return TCL_ERROR;

}

Tcl_StaticLibrary(interp, "Tktest", Tktest_Init, 0);

#endif /* TK_TEST */

* Call the init procedures for included packages. Each call should look

* like this:

* if (Mod_Init(interp) == TCL_ERROR) {

* return TCL_ERROR;

* }

* where "Mod" is the name of the module. (Dynamically-loadable packages

* should have the same entry-point name.)

* Call Tcl_CreateObjCommand for application-specific commands, if they

* weren't already created by the init procedures called above.

* Specify a user-specific startup file to invoke if the application is

* run interactively. Typically the startup file is "~/.apprc" where "app"

* is the name of the application. If this line is deleted then no

* user-specific startup file will be run under any conditions.

(void) Tcl_EvalEx(interp,

"set tcl_rcFileName [file tildeexpand ~/.wishrc]",

-1, TCL_EVAL_GLOBAL);

return TCL_OK;

}

* Local Variables:

* mode: c

* c-basic-offset: 4

* fill-column: 78

* End:

cpython-source-deps/unix/tkAppInit.c at tk · python/cpython-source-deps · GitHub

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