summaryrefslogtreecommitdiffstats
path: root/Mac/Python/macgetpath.c
blob: 98abbd875c33c9bf27f44d063e6ce7df7f238dc6 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
/***********************************************************
Copyright 1991-1997 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 or Corporation for National Research Initiatives or
CNRI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior
permission.

While CWI is the initial source for this software, a modified version
is made available by the Corporation for National Research Initiatives
(CNRI) at the Internet address ftp://ftp.python.org.

STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
CENTRUM OR CNRI 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"
#include "osdefs.h"
#include "macglue.h"
#include "pythonresources.h"


/* Return the initial python search path.  This is called once from
** initsys() to initialize sys.path.
**
** If USE_BUILTIN_PATH is defined the path defined here is used
** (after prepending the python home dir to each item).
** If it is not defined the path is gotten from a resource in the
** Preferences file.
**
** XXXX This code needs cleaning up. The routines here have moved
** around quite a bit, and they're pretty messy for that reason.
*/

#include <Files.h>
#include <Aliases.h>
#include <Folders.h>
#include <Resources.h>
#include <TextUtils.h>
#include <Dialogs.h>

#ifdef USE_GUSI
#include <GUSI.h>
#endif

#define PYTHONPATH "\
:\n\
:Lib\n\
:Lib:stdwin\n\
:Lib:test\n\
:Lib:mac"

static void
getpreffilefss(FSSpec *fssp)
{
	static int diditbefore=0;
	static FSSpec fss;
    short prefdirRefNum;
    long prefdirDirID;
    Handle namehandle;
    
    if ( !diditbefore ) {
	    if ( FindFolder(kOnSystemDisk, 'pref', kDontCreateFolder, &prefdirRefNum,
	    				&prefdirDirID) != noErr ) {
	    	/* Something wrong with preferences folder */
	    	(void)StopAlert(NOPREFDIR_ID, NULL);
	    	exit(1);
	    }
	    
	    if ( (namehandle=GetNamedResource('STR ', PREFFILENAME_NAME)) == NULL ) {
	    	(void)StopAlert(NOPREFNAME_ID, NULL);
	    	exit(1);
	    }
	    
	    HLock(namehandle);
		(void)FSMakeFSSpec(prefdirRefNum, prefdirDirID, (unsigned char *)*namehandle, &fss);
		HUnlock(namehandle);
		ReleaseResource(namehandle);
		diditbefore = 1;
	}
	*fssp = fss;
}

char *
Py_GetPath()
{
	/* Modified by Jack to do something a bit more sensible:
	** - Prepend the python home-directory (which is obtained from a Preferences
	**   resource)
	** - Add :
	*/
	static char *pythonpath;
	char *p, *endp;
	int newlen;
	char *curwd;
#ifndef USE_BUILTIN_PATH
	staticforward char *PyMac_GetPythonPath();
#endif
	
	if ( pythonpath ) return pythonpath;
#ifndef USE_BUILTIN_PATH
	if ( pythonpath = PyMac_GetPythonPath() )
		return pythonpath;
	printf("Warning: No pythonpath resource found, using builtin default\n");
#endif
	curwd = PyMac_GetPythonDir();
	p = PYTHONPATH;
	endp = p;
	pythonpath = malloc(2);
	if ( pythonpath == NULL ) return PYTHONPATH;
	strcpy(pythonpath, ":");
	while (*endp) {
		endp = strchr(p, '\n');
		if ( endp == NULL )
			endp = p + strlen(p);
		newlen = strlen(pythonpath) + 1 + strlen(curwd) + (endp-p);
		pythonpath = realloc(pythonpath, newlen+1);
		if ( pythonpath == NULL ) return PYTHONPATH;
		strcat(pythonpath, "\n");
		if ( *p == ':' ) {
			p++;
			strcat(pythonpath, curwd);
			strncat(pythonpath, p, (endp-p));
			newlen--;   /* Ok, ok, we've allocated one byte too much */
		} else {
			/* We've allocated too much in this case */
			newlen -= strlen(curwd);
			pythonpath = realloc(pythonpath, newlen+1);
			if ( pythonpath == NULL ) return PYTHONPATH;
			strncat(pythonpath, p, (endp-p));
		}
		pythonpath[newlen] = '\0';
		p = endp + 1;
	}
	return pythonpath;
}


/*
** Open/create the Python Preferences file, return the handle
*/
static short
PyMac_OpenPrefFile()
{
    AliasHandle handle;
    FSSpec dirspec;
    short prefrh;
    OSErr err;

	getpreffilefss(&dirspec);
	prefrh = FSpOpenResFile(&dirspec, fsRdWrShPerm);
	if ( prefrh < 0 ) {
#if 0
		action = CautionAlert(NOPREFFILE_ID, NULL);
		if ( action == NOPREFFILE_NO )
			exit(1);
#endif
		FSpCreateResFile(&dirspec, 'Pyth', 'pref', 0);
		prefrh = FSpOpenResFile(&dirspec, fsRdWrShPerm);
		if ( prefrh == -1 ) {
			/* This "cannot happen":-) */
			printf("Cannot create preferences file, error %d\n", ResError());
			exit(1);
		}
		if ( (err=PyMac_init_process_location()) != 0 ) {
			printf("Cannot get application location, error %d\n", err);
			exit(1);
		}
		dirspec = PyMac_ApplicationFSSpec;
		dirspec.name[0] = 0;
		if ((err=NewAlias(NULL, &dirspec, &handle)) != 0 ) {
			printf("Cannot make alias to application directory, error %d\n", err);
			exit(1);
		}
    	AddResource((Handle)handle, 'alis', PYTHONHOME_ID, "\p");
    	UpdateResFile(prefrh);

	} else {
		UseResFile(prefrh);
	}
	return prefrh;
}

/*
** Return the name of the Python directory
*/
char *
PyMac_GetPythonDir()
{
	static int diditbefore = 0;
    static char name[256] = {':', '\0'};
    AliasHandle handle;
    FSSpec dirspec;
    Boolean modified = 0;
    short oldrh, prefrh = -1, homerh;
    
    if ( diditbefore )
    	return name;
    	
    oldrh = CurResFile();

    /* First look for an override in the application file */
    UseResFile(PyMac_AppRefNum);
    handle = (AliasHandle)Get1Resource('alis', PYTHONHOMEOVERRIDE_ID);
    if ( handle != NULL ) {
    	homerh = PyMac_AppRefNum;
    } else {   
	    /* Try to open preferences file in the preferences folder. */
	    prefrh = PyMac_OpenPrefFile();
	    handle = (AliasHandle)Get1Resource('alis', PYTHONHOME_ID);
	    if ( handle == NULL ) {
	    	(void)StopAlert(BADPREFFILE_ID, NULL);
	    	diditbefore=1;
	    	return ":";
	    }
	    homerh = prefrh;
    }
	/* It exists. Resolve it (possibly updating it) */
	if ( ResolveAlias(NULL, handle, &dirspec, &modified) != noErr ) {
    	(void)StopAlert(BADPREFFILE_ID, NULL);
    	diditbefore=1;
    	return ":";
    }
    if ( modified ) {
   		ChangedResource((Handle)handle);
    	UpdateResFile(homerh);
    }
    if ( prefrh != -1 ) CloseResFile(prefrh);
    UseResFile(oldrh);

   	if ( PyMac_GetFullPath(&dirspec, name) == 0 ) {
   		strcat(name, ":");
    } else {
 		/* If all fails, we return the current directory */
   		printf("Python home dir exists but I cannot find the pathname!!\n");
		name[0] = 0;
		(void)getwd(name);
	}
	diditbefore = 1;
	return name;
}

#ifndef USE_BUILTIN_PATH
char *
PyMac_GetPythonPath()
{
    short oldrh, prefrh = -1;
    char *rv;
    int i, newlen;
    Str255 pathitem;
    int resource_id;
    OSErr err;
    Handle h;
    
    oldrh = CurResFile();
    /*
    ** This is a bit tricky. We check here whether the application file
    ** contains an override. This is to forestall us finding another STR# resource
    ** with "our" id and using that for path initialization
    */
    UseResFile(PyMac_AppRefNum);
    SetResLoad(0);
    if ( (h=Get1Resource('STR#', PYTHONPATHOVERRIDE_ID)) ) {
    	ReleaseResource(h);
    	resource_id = PYTHONPATHOVERRIDE_ID;
    } else {
    	resource_id = PYTHONPATH_ID;
    }
    SetResLoad(1);
    UseResFile(oldrh);
    
    /* Open the preferences file only if there is no override */
    if ( resource_id != PYTHONPATHOVERRIDE_ID )
	    prefrh = PyMac_OpenPrefFile();
    /* At this point, we may or may not have the preferences file open, and it
    ** may or may not contain a sys.path STR# resource. We don't care, if it doesn't
    ** exist we use the one from the application (the default).
    ** We put an initial '\n' in front of the path that we don't return to the caller
    */
    if( (rv = malloc(2)) == NULL )
    	goto out;
    strcpy(rv, "\n");

    for(i=1; ; i++) {
    	GetIndString(pathitem, resource_id, i);
    	if( pathitem[0] == 0 )
    		break;
    	if ( pathitem[0] >= 9 && strncmp((char *)pathitem+1, "$(PYTHON)", 9) == 0 ) {
    		/* We have to put the directory in place */
    		char *dir = PyMac_GetPythonDir();
    		
    		newlen = strlen(rv) + strlen(dir) + (pathitem[0]-9) + 2;
    		if( (rv=realloc(rv, newlen)) == NULL)
    			goto out;
    		strcat(rv, dir);
    		/* Skip a colon at the beginning of the item */
    		if ( pathitem[0] > 9 && pathitem[1+9] == ':' ) {
				memcpy(rv+strlen(rv), pathitem+1+10, pathitem[0]-10);
				newlen--;
			} else {
				memcpy(rv+strlen(rv), pathitem+1+9, pathitem[0]-9);
			}
    		rv[newlen-2] = '\n';
    		rv[newlen-1] = 0;
    	} else if ( pathitem[0] >= 14 && strncmp((char *)pathitem+1, "$(APPLICATION)", 14) == 0 ) {
    		/* This is the application itself */
			
    		if ( (err=PyMac_init_process_location()) != 0 ) {
				printf("Cannot get  application location, error %d\n", err);
				exit(1);
			}

			newlen = strlen(rv) + strlen(PyMac_ApplicationPath) + 2;
    		if( (rv=realloc(rv, newlen)) == NULL)
    			goto out;
    		strcpy(rv+strlen(rv), PyMac_ApplicationPath);
    		rv[newlen-2] = '\n';
    		rv[newlen-1] = 0;

    	} else {
    		/* Use as-is */
    		newlen = strlen(rv) + (pathitem[0]) + 2;
    		if( (rv=realloc(rv, newlen)) == NULL)
    			goto out;
    		memcpy(rv+strlen(rv), pathitem+1, pathitem[0]);
    		rv[newlen-2] = '\n';
    		rv[newlen-1] = 0;
    	}
	}
	if( strlen(rv) == 1) {
		free(rv);
		rv = NULL;
	}
	if ( rv ) {
		rv[strlen(rv)-1] = 0;
		rv++;
	}
out:
	if ( prefrh != -1) CloseResFile(prefrh);
	UseResFile(oldrh);
	return rv;
}
#endif /* !USE_BUILTIN_PATH */

void
PyMac_PreferenceOptions(PyMac_PrefRecord *pr)
{
	short oldrh, prefrh = -1;
	Handle handle;
	int size;
	PyMac_PrefRecord *p;
	int action;
	
	
    oldrh = CurResFile();
    
    /* Attempt to load overrides from application */
    UseResFile(PyMac_AppRefNum);
    handle = Get1Resource('Popt', PYTHONOPTIONSOVERRIDE_ID);
    UseResFile(oldrh);
    
    /* Otherwise get options from prefs file or any other open resource file */
    if ( handle == NULL ) {
	    prefrh = PyMac_OpenPrefFile();
	    handle = GetResource('Popt', PYTHONOPTIONS_ID);
	}
    if ( handle == NULL ) {
    	return;
    }
    HLock(handle);
    size = GetHandleSize(handle);
    p = (PyMac_PrefRecord *)*handle;
    if ( p->version == POPT_VERSION_CURRENT && size == sizeof(PyMac_PrefRecord) ) {
    	*pr = *p;
    } else {
	action = CautionAlert(BADPREFERENCES_ID, NULL);
	if ( action == BADPREF_DELETE ) {
		OSErr err;
		
		RemoveResource(handle);
		if ( (err=ResError()) ) printf("RemoveResource: %d\n", err);
		if ( prefrh != -1 ) {
			UpdateResFile(prefrh);
			if ( (err=ResError()) ) printf("UpdateResFile: %d\n", err);
		}
	} else if ( action == BADPREF_QUIT )
		exit(1);
    }    
    HUnlock(handle);

   	if ( prefrh != -1) CloseResFile(prefrh);
    UseResFile(oldrh);
}

#ifdef USE_GUSI
void
PyMac_SetGUSIOptions()
{
	Handle h;
	short oldrh, prefrh = -1;
	
	oldrh = CurResFile();
	
	/* Try override from the application resource fork */
	UseResFile(PyMac_AppRefNum);
	h = Get1Resource('GU\267I', GUSIOPTIONSOVERRIDE_ID);
	UseResFile(oldrh);
	
	/* If that didn't work try nonoverride from anywhere */
	if ( h == NULL ) {
		prefrh = PyMac_OpenPrefFile();
		h = GetResource('GU\267I', GUSIOPTIONS_ID);
	}
	if ( h ) GUSILoadConfiguration(h);
   	if ( prefrh != -1) CloseResFile(prefrh);
    UseResFile(oldrh);
}
#endif /* USE_GUSI */