cpython/Mac/Python/macglue.c

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/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Stichting Mathematisch
Centrum or CWI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior permission.
STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
******************************************************************/
#include "Python.h"
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#include "macglue.h"
#include "marshal.h"
#include "import.h"
#include <OSUtils.h> /* for Set(Current)A5 */
#include <Files.h>
#include <Aliases.h>
#include <Folders.h>
#include <StandardFile.h>
#include <Resources.h>
#include <Memory.h>
#include <Events.h>
#include <Windows.h>
#include <Desk.h>
#include <Traps.h>
#include <Processes.h>
#include <Fonts.h>
#include <Menus.h>
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#ifdef THINK_C
#include <OSEvents.h> /* For EvQElPtr */
#endif
#ifndef HAVE_UNIVERSAL_HEADERS
#define GetResourceSizeOnDisk(x) SizeResource(x)
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typedef DlgHookYDProcPtr DlgHookYDUPP;
#define NewDlgHookYDProc(userRoutine) ((DlgHookYDUPP) (userRoutine))
typedef FileFilterYDProcPtr FileFilterYDUPP;
#endif
#include <signal.h>
#include <stdio.h>
/* The alert for "No Python directory, where is it?" */
#define NOPYTHON_ALERT 128
#define YES_ITEM 1
#define NO_ITEM 2
#define CURWD_ITEM 3
/* The alert for "this is an applet template" */
#define NOPYC_ALERT 129
/* The dialog for our GetDirectory call */
#define GETDIR_ID 130 /* Resource ID for our "get directory" */
#define SELECTCUR_ITEM 10 /* "Select current directory" button */
#ifdef __MWERKS__
/*
** With MW we can pass the event off to the console window, so
** we might as well handle all events.
*/
#include <SIOUX.h>
#define MAINLOOP_EVENTMASK everyEvent
#else
/*
** For other compilers we're more careful, since we can't handle
** things like updates (and they'll keep coming back if we don't
** handle them)
*/
#define MAINLOOP_EVENTMASK (mDownMask|keyDownMask|osMask)
#endif /* __MWERKS__ */
#include <signal.h>
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/* XXX We should include Errors.h here, but it has a name conflict
** with the python errors.h. */
#define fnfErr -43
/* Declared in macfsmodule.c: */
extern FSSpec *mfs_GetFSSpecFSSpec();
/* Interrupt code variables: */
static int interrupted; /* Set to true when cmd-. seen */
static RETSIGTYPE intcatcher Py_PROTO((int));
/*
** We attempt to be a good citizen by giving up the CPU periodically.
** When in the foreground we do this less often and for shorter periods
** than when in the background. At this time we also check for events and
** pass them off to SIOUX, if compiling with mwerks.
** The counts here are in ticks of 1/60th second.
** XXXX The initial values here are not based on anything.
** FG-python gives up the cpu for 1/60th 5 times per second,
** BG-python for .2 second 10 times per second.
*/
static long interval_fg = 12;
static long interval_bg = 6;
static long yield_fg = 1;
static long yield_bg = 12;
static long lastyield;
static int in_foreground;
int PyMac_DoYieldEnabled = 1; /* Don't do eventloop when false */
/* Convert C to Pascal string. Returns pointer to static buffer. */
unsigned char *
Pstring(char *str)
{
static Str255 buf;
int len;
len = strlen(str);
if (len > 255)
len = 255;
buf[0] = (unsigned char)len;
strncpy((char *)buf+1, str, len);
return buf;
}
/* Like strerror() but for Mac OS error numbers */
char *PyMac_StrError(int err)
{
static char buf[256];
Handle h;
char *str;
h = GetResource('Estr', err);
if ( h ) {
HLock(h);
str = (char *)*h;
memcpy(buf, str+1, (unsigned char)str[0]);
buf[(unsigned char)str[0]] = '\0';
HUnlock(h);
ReleaseResource(h);
} else {
sprintf(buf, "Mac OS error code %d", err);
}
return buf;
}
/* Exception object shared by all Mac specific modules for Mac OS errors */
PyObject *PyMac_OSErrException;
/* Initialize and return PyMac_OSErrException */
PyObject *
PyMac_GetOSErrException()
{
if (PyMac_OSErrException == NULL)
PyMac_OSErrException = PyString_FromString("Mac OS Error");
return PyMac_OSErrException;
}
/* Set a MAC-specific error from errno, and return NULL; return None if no error */
PyObject *
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PyErr_Mac(PyObject *eobj, int err)
{
char *msg;
PyObject *v;
if (err == 0 && !PyErr_Occurred()) {
Py_INCREF(Py_None);
return Py_None;
}
if (err == -1 && PyErr_Occurred())
return NULL;
msg = PyMac_StrError(err);
v = Py_BuildValue("(is)", err, msg);
PyErr_SetObject(eobj, v);
Py_DECREF(v);
return NULL;
}
/* Call PyErr_Mac with PyMac_OSErrException */
PyObject *
PyMac_Error(OSErr err)
{
return PyErr_Mac(PyMac_GetOSErrException(), err);
}
/* The catcher routine (which may not be used for all compilers) */
static RETSIGTYPE
intcatcher(sig)
int sig;
{
interrupted = 1;
signal(SIGINT, intcatcher);
}
void
PyOS_InitInterrupts()
{
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
signal(SIGINT, intcatcher);
}
/*
** This routine scans the event queue looking for cmd-.
** This is the only way to get an interrupt under THINK (since it
** doesn't do SIGINT handling), but is also used under MW, when
** the full-fledged event loop is disabled. This way, we can at least
** interrupt a runaway python program.
*/
static void
scan_event_queue(flush)
int flush;
{
register EvQElPtr q;
q = (EvQElPtr) GetEvQHdr()->qHead;
for (; q; q = (EvQElPtr)q->qLink) {
if (q->evtQWhat == keyDown &&
(char)q->evtQMessage == '.' &&
(q->evtQModifiers & cmdKey) != 0) {
if ( flush )
FlushEvents(keyDownMask, 0);
interrupted = 1;
break;
}
}
}
int
PyOS_InterruptOccurred()
{
#ifdef THINK_C
scan_event_queue(1);
#endif
PyMac_Yield();
if (interrupted) {
interrupted = 0;
return 1;
}
return 0;
}
/* intrpeek() is like intrcheck(), but it doesn't flush the events. The
** idea is that you call intrpeek() somewhere in a busy-wait loop, and return
** None as soon as it returns 1. The mainloop will then pick up the cmd-. soon
** thereafter.
*/
static int
intrpeek()
{
#ifdef THINK_C
scan_event_queue(0);
#endif
return interrupted;
}
/* Check whether we are in the foreground */
int
PyMac_InForeground()
{
static ProcessSerialNumber ours;
static inited;
ProcessSerialNumber curfg;
Boolean eq;
if ( inited == 0 )
(void)GetCurrentProcess(&ours);
inited = 1;
if ( GetFrontProcess(&curfg) < 0 )
eq = 1;
else if ( SameProcess(&ours, &curfg, &eq) < 0 )
eq = 1;
return (int)eq;
}
/*
** Set yield timeouts
*/
void
PyMac_SetYield(long fgi, long fgy, long bgi, long bgy)
{
interval_fg = fgi;
yield_fg = fgy;
interval_bg = bgi;
yield_bg = bgy;
}
/*
** Handle an event, either one found in the mainloop eventhandler or
** one passed back from the python program.
*/
void
PyMac_HandleEvent(evp)
EventRecord *evp;
{
WindowPtr wp;
#ifdef __MWERKS__
/* If SIOUX wants it we're done */
(void)SIOUXHandleOneEvent(evp);
#else
/* Other compilers are just unlucky: we only weed out clicks in other applications */
if ( evp->what == mouseDown ) {
if ( FindWindow(evp->where, &wp) == inSysWindow )
SystemClick(evp, wp);
}
#endif /* !__MWERKS__ */
}
/*
** Yield the CPU to other tasks.
*/
static
PyMac_DoYield()
{
EventRecord ev;
long yield;
static int no_waitnextevent = -1;
int gotone;
if ( no_waitnextevent < 0 ) {
no_waitnextevent = (NGetTrapAddress(_WaitNextEvent, ToolTrap) ==
NGetTrapAddress(_Unimplemented, ToolTrap));
}
if ( !PyMac_DoYieldEnabled ) {
#ifndef THINK_C
/* Under think this has been done before in intrcheck() or intrpeek() */
scan_event_queue(0);
#endif
return;
}
in_foreground = PyMac_InForeground();
if ( in_foreground )
yield = yield_fg;
else
yield = yield_bg;
while ( 1 ) {
if ( no_waitnextevent ) {
SystemTask();
gotone = GetNextEvent(MAINLOOP_EVENTMASK, &ev);
} else {
gotone = WaitNextEvent(MAINLOOP_EVENTMASK, &ev, yield, NULL);
}
/* Get out quickly if nothing interesting is happening */
if ( !gotone || ev.what == nullEvent )
break;
PyMac_HandleEvent(&ev);
}
lastyield = TickCount();
}
/*
** Yield the CPU to other tasks if opportune
*/
void
PyMac_Yield() {
long iv;
if ( in_foreground )
iv = interval_fg;
else
iv = interval_bg;
if ( TickCount() > lastyield + iv )
PyMac_DoYield();
}
/*
** Idle routine for busy-wait loops.
** Gives up CPU, handles events and returns true if an interrupt is pending
** (but not actually handled yet).
*/
int
PyMac_Idle()
{
PyMac_DoYield();
return intrpeek();
}
/*
** Return the name of the Python directory
*/
char *
PyMac_GetPythonDir()
{
int item;
static char name[256];
AliasHandle handle;
FSSpec dirspec;
int ok = 0, exists = 0;
Boolean modified = 0, cannotmodify = 0;
short oldrh, prefrh;
short prefdirRefNum;
long prefdirDirID;
/*
** Remember old resource file and try to open preferences file
** in the preferences folder. If it doesn't exist we try to create
** it. If anything fails here we limp on, but set cannotmodify so
** we don't try to store things later on.
*/
oldrh = CurResFile();
if ( FindFolder(kOnSystemDisk, 'pref', kDontCreateFolder, &prefdirRefNum,
&prefdirDirID) != noErr ) {
/* Something wrong with preferences folder */
cannotmodify = 1;
} else {
(void)FSMakeFSSpec(prefdirRefNum, prefdirDirID, "\pPython Preferences", &dirspec);
prefrh = FSpOpenResFile(&dirspec, fsRdWrShPerm);
if ( prefrh == -1 ) {
/* It doesn't exist. Try to create it */
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FSpCreateResFile(&dirspec, 'PYTH', 'pref', 0);
prefrh = FSpOpenResFile(&dirspec, fsRdWrShPerm);
if ( prefrh == -1 ) {
cannotmodify = 1;
} else {
UseResFile(prefrh);
}
}
}
/* So, we've opened our preferences file, we hope. Look for the alias */
handle = (AliasHandle)Get1Resource('alis', 128);
if ( handle ) {
/* It exists. Resolve it (possibly updating it) */
if ( ResolveAlias(NULL, handle, &dirspec, &modified) == noErr )
ok = 1;
exists = 1;
}
if ( !ok ) {
/* No luck, so far. ask the user for help */
item = Alert(NOPYTHON_ALERT, NULL);
if ( item == YES_ITEM ) {
/* The user wants to point us to a directory. Let her do so */
ok = PyMac_GetDirectory(&dirspec);
if ( ok )
modified = 1;
} else if ( item == CURWD_ITEM ) {
/* The user told us the current directory is fine. Build an FSSpec for it */
if ( getwd(name) ) {
if ( FSMakeFSSpec(0, 0, Pstring(name), &dirspec) == 0 ) {
ok = 1;
modified = 1;
}
}
}
}
if ( ok && modified && !cannotmodify) {
/* We have a new, valid fsspec and we can update the preferences file. Do so. */
if ( !exists ) {
if (NewAlias(NULL, &dirspec, &handle) == 0 )
AddResource((Handle)handle, 'alis', 128, "\p");
} else {
ChangedResource((Handle)handle);
}
UpdateResFile(prefrh);
}
if ( !cannotmodify ) {
/* This means we have the resfile open. Close it. */
CloseResFile(prefrh);
}
/* Back to the old resource file */
UseResFile(oldrh);
/* Now turn the fsspec into a path to give back to our caller */
if ( ok ) {
ok = (nfullpath(&dirspec, name) == 0);
if ( ok ) strcat(name, ":");
}
if ( !ok ) {
/* If all fails, we return the current directory */
name[0] = 0;
(void)getwd(name);
}
return name;
}
/*
** Returns true if the argument has a resource fork, and it contains
** a 'PYC ' resource of the correct name
*/
int
PyMac_FindResourceModule(module, filename)
char *module;
char *filename;
{
FSSpec fss;
FInfo finfo;
short oldrh, filerh;
int ok;
Handle h;
if ( FSMakeFSSpec(0, 0, Pstring(filename), &fss) != noErr )
return 0; /* It doesn't exist */
if ( FSpGetFInfo(&fss, &finfo) != noErr )
return 0; /* shouldn't happen, I guess */
oldrh = CurResFile();
filerh = FSpOpenResFile(&fss, fsRdPerm);
if ( filerh == -1 )
return 0;
UseResFile(filerh);
SetResLoad(0);
h = Get1NamedResource('PYC ', Pstring(module));
SetResLoad(1);
ok = (h != NULL);
CloseResFile(filerh);
UseResFile(oldrh);
return ok;
}
/*
** Load the specified module from a resource
*/
PyObject *
PyMac_LoadResourceModule(module, filename)
char *module;
char *filename;
{
FSSpec fss;
FInfo finfo;
short oldrh, filerh;
int ok;
Handle h;
OSErr err;
PyObject *m, *co;
long num, size;
if ( (err=FSMakeFSSpec(0, 0, Pstring(filename), &fss)) != noErr )
goto error;
if ( (err=FSpGetFInfo(&fss, &finfo)) != noErr )
goto error;
oldrh = CurResFile();
filerh = FSpOpenResFile(&fss, fsRdPerm);
if ( filerh == -1 ) {
err = ResError();
goto error;
}
UseResFile(filerh);
h = Get1NamedResource('PYC ', Pstring(module));
if ( h == NULL ) {
err = ResError();
goto error;
}
HLock(h);
/*
** XXXX The next few lines are intimately tied to the format of pyc
** files. I'm not sure whether this code should be here or in import.c -- Jack
*/
size = GetHandleSize(h);
if ( size < 8 ) {
PyErr_SetString(PyExc_ImportError, "Resource too small");
co = NULL;
} else {
num = (*h)[0] & 0xff;
num = num | (((*h)[1] & 0xff) << 8);
num = num | (((*h)[2] & 0xff) << 16);
num = num | (((*h)[3] & 0xff) << 24);
if ( num != PyImport_GetMagicNumber() ) {
PyErr_SetString(PyExc_ImportError, "Bad MAGIC in resource");
co = NULL;
} else {
co = PyMarshal_ReadObjectFromString((*h)+8, size-8);
}
}
HUnlock(h);
CloseResFile(filerh);
UseResFile(oldrh);
if ( co ) {
m = PyImport_ExecCodeModule(module, co);
Py_DECREF(co);
} else {
m = NULL;
}
return m;
error:
{
char buf[512];
sprintf(buf, "%s: %s", filename, PyMac_StrError(err));
PyErr_SetString(PyExc_ImportError, buf);
return NULL;
}
}
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/*
** Helper routine for GetDirectory
*/
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static pascal short
myhook_proc(short item, DialogPtr theDialog, void *dataptr)
{
if ( item == SELECTCUR_ITEM ) {
item = sfItemCancelButton;
* (int *)dataptr = 1;
}
return item;
}
/*
** Ask the user for a directory. I still can't understand
** why Apple doesn't provide a standard solution for this...
*/
int
PyMac_GetDirectory(dirfss)
FSSpec *dirfss;
{
static SFTypeList list = {'fldr', 0, 0, 0};
static Point where = {-1, -1};
static DlgHookYDUPP myhook_upp;
static int upp_inited = 0;
StandardFileReply reply;
int select_clicked = 0;
if ( !upp_inited ) {
myhook_upp = NewDlgHookYDProc(myhook_proc);
upp_inited = 1;
}
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CustomGetFile((FileFilterYDUPP)0, 1, list, &reply, GETDIR_ID, where, myhook_upp,
NULL, NULL, NULL, (void *)&select_clicked);
reply.sfFile.name[0] = 0;
if( FSMakeFSSpec(reply.sfFile.vRefNum, reply.sfFile.parID, reply.sfFile.name, dirfss) )
return 0;
return select_clicked;
}
/* Convert a 4-char string object argument to an OSType value */
int
PyMac_GetOSType(PyObject *v, OSType *pr)
{
if (!PyString_Check(v) || PyString_Size(v) != 4) {
PyErr_SetString(PyExc_TypeError,
"OSType arg must be string of 4 chars");
return 0;
}
memcpy((char *)pr, PyString_AsString(v), 4);
return 1;
}
/* Convert an OSType value to a 4-char string object */
PyObject *
PyMac_BuildOSType(OSType t)
{
return PyString_FromStringAndSize((char *)&t, 4);
}
/* Convert a Python string object to a Str255 */
int
PyMac_GetStr255(PyObject *v, Str255 pbuf)
{
int len;
if (!PyString_Check(v) || (len = PyString_Size(v)) > 255) {
PyErr_SetString(PyExc_TypeError,
"Str255 arg must be string of at most 255 chars");
return 0;
}
pbuf[0] = len;
memcpy((char *)(pbuf+1), PyString_AsString(v), len);
return 1;
}
/* Convert a Str255 to a Python string object */
PyObject *
PyMac_BuildStr255(Str255 s)
{
return PyString_FromStringAndSize((char *)&s[1], (int)s[0]);
}
/*
** Convert a Python object to an FSSpec.
** The object may either be a full pathname or a triple
** (vrefnum, dirid, path).
** NOTE: This routine will fail on pre-sys7 machines.
** The caller is responsible for not calling this routine
** in those cases (which is fine, since everyone calling
** this is probably sys7 dependent anyway).
*/
int
PyMac_GetFSSpec(PyObject *v, FSSpec *fs)
{
Str255 path;
short refnum;
long parid;
OSErr err;
FSSpec *fs2;
/* first check whether it already is an FSSpec */
fs2 = mfs_GetFSSpecFSSpec(v);
if ( fs2 ) {
(void)FSMakeFSSpec(fs2->vRefNum, fs2->parID, fs2->name, fs);
return 1;
}
if ( PyString_Check(v) ) {
/* It's a pathname */
if( !PyArg_Parse(v, "O&", PyMac_GetStr255, &path) )
return 0;
refnum = 0; /* XXXX Should get CurWD here... */
parid = 0;
} else {
if( !PyArg_Parse(v, "(hlO&); FSSpec should be fullpath or (vrefnum,dirid,path)",
&refnum, &parid, PyMac_GetStr255, &path)) {
return 0;
}
}
err = FSMakeFSSpec(refnum, parid, path, fs);
if ( err && err != fnfErr ) {
PyErr_Mac(PyExc_ValueError, err);
return 0;
}
return 1;
}
/* Convert a Python object to a Rect.
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The object must be a (left, top, right, bottom) tuple.
(This differs from the order in the struct but is consistent with
the arguments to SetRect(), and also with STDWIN). */
int
PyMac_GetRect(PyObject *v, Rect *r)
{
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return PyArg_Parse(v, "(hhhh)", &r->left, &r->top, &r->right, &r->bottom);
}
/* Convert a Rect to a Python object */
PyObject *
PyMac_BuildRect(Rect *r)
{
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return Py_BuildValue("(hhhh)", r->left, r->top, r->right, r->bottom);
}
/* Convert a Python object to a Point.
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The object must be a (h, v) tuple.
(This differs from the order in the struct but is consistent with
the arguments to SetPoint(), and also with STDWIN). */
int
PyMac_GetPoint(PyObject *v, Point *p)
{
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return PyArg_Parse(v, "(hh)", &p->h, &p->v);
}
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/* Convert a Point to a Python object */
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PyObject *
PyMac_BuildPoint(Point p)
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{
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return Py_BuildValue("(hh)", p.h, p.v);
}
/* Convert a Python object to an EventRecord.
The object must be a (what, message, when, (v, h), modifiers) tuple. */
int
PyMac_GetEventRecord(PyObject *v, EventRecord *e)
{
return PyArg_Parse(v, "(hll(hh)h)",
&e->what,
&e->message,
&e->when,
&e->where.h,
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&e->where.v,
&e->modifiers);
}
/* Convert a Rect to an EventRecord object */
PyObject *
PyMac_BuildEventRecord(EventRecord *e)
{
return Py_BuildValue("(hll(hh)h)",
e->what,
e->message,
e->when,
e->where.h,
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e->where.v,
e->modifiers);
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}
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#ifndef USE_MAC_SHARED_LIBRARY
/* For normal application */
void
main()
{
int argc;
char **argv;
#ifdef __MWERKS__
SIOUXSettings.asktosaveonclose = 0;
SIOUXSettings.showstatusline = 0;
SIOUXSettings.tabspaces = 4;
#endif
argc = PyMac_GetArgv(&argv);
Py_Main(argc, argv);
}
#else /* USE_MAC_SHARED_LIBRARY */
/* Applet support */
/* Run a compiled Python Python script from 'PYC ' resource __main__ */
static int
run_main_resource()
{
Handle h;
long size;
PyObject *code;
PyObject *result;
h = GetNamedResource('PYC ', "\p__main__");
if (h == NULL) {
Alert(NOPYC_ALERT, NULL);
return 1;
}
size = GetResourceSizeOnDisk(h);
HLock(h);
code = PyMarshal_ReadObjectFromString(*h + 8, (int)(size - 8));
HUnlock(h);
ReleaseResource(h);
if (code == NULL) {
PyErr_Print();
return 1;
}
result = PyImport_ExecCodeModule("__main__", code);
Py_DECREF(code);
if (result == NULL) {
PyErr_Print();
return 1;
}
Py_DECREF(result);
return 0;
}
/* Initialization sequence for applets */
void
PyMac_InitApplet()
{
int argc;
char **argv;
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int err;
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#ifdef USE_MAC_SHARED_LIBRARY
PyMac_AddLibResources();
#endif
#ifdef __MWERKS__
SIOUXSettings.asktosaveonclose = 0;
SIOUXSettings.showstatusline = 0;
SIOUXSettings.tabspaces = 4;
#endif
argc = PyMac_GetArgv(&argv);
Py_Initialize();
PySys_SetArgv(argc, argv);
err = run_main_resource();
fflush(stderr);
fflush(stdout);
#ifdef __MWERKS__
if (!err)
SIOUXSettings.autocloseonquit = 1;
else
SIOUXSettings.showstatusline = 1;
#endif
/* XXX Should we bother to Py_Exit(sts)? */
}
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#endif /* USE_MAC_SHARED_LIBRARY */