forked from ge-ne/bibtool
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathpxfile.c
363 lines (346 loc) · 15.4 KB
/
pxfile.c
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
/*** pxfile.c *****************************************************************
**
** This file is part of BibTool.
** It is distributed under the GNU General Public License.
** See the file COPYING for details.
**
** (c) 1996-2017 Gerd Neugebauer
**
** Net: gene@gerd-neugebauer.de
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2, or (at your option)
** any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
**
**-----------------------------------------------------------------------------
** Description:
** This file provides routines for extended file opening. Files
** are sought in a list of directories and optionally with a set
** of extensions appended to them.
**
** Patterns may be given which are used to determine the full file
** name.
** The patterns are stored in a special data structure. A
** function is provided to allocate a pattern structure and fill
** it from a string specification.
**
******************************************************************************/
#include "config.h"
#include <bibtool/general.h>
#include <bibtool/pxfile.h>
#include <bibtool/sbuffer.h>
#include <ctype.h>
#ifndef __STDC__
#ifndef HAVE_GETENV
extern char * getenv _ARG((char* name)); /* */
#endif
#endif
#ifndef DEFAULT_PATTERN
#ifdef MSDOS
#define DEFAULT_PATTERN "%s\\%s"
#else
#define DEFAULT_PATTERN "%s/%s"
#endif
#endif
/*****************************************************************************/
/* Internal Programs */
/*===========================================================================*/
#ifdef __STDC__
#define _ARG(A) A
#else
#define _ARG(A) ()
#endif
FILE * px_fopen _ARG((char * name,char * mode,char **pattern,char **path,int (*show)_ARG((char*))));
char ** px_s2p _ARG((char * s,int sep));
static bool absolute_file _ARG((char *name,char **basename,char ***path));
static void expand_env _ARG((char * s,char * se,StringBuffer * res));
/*****************************************************************************/
/* External Programs */
/*===========================================================================*/
/*****************************************************************************/
/*-----------------------------------------------------------------------------
** Variable: px_filename
** Purpose: This variable contains the file name actually used by
** the last |px_fopen()| call. The memory is automatically
** managed and will be reused by the next call to
** |px_fopen()|. Thus if you need to use it make a
** private copy immediately after the call to the
** function |px_fopen()|.
**___________________________________________________ */
char *px_filename = "" ;
static size_t px_len = 0 ;
static char * no_path[] = { "." , NULL };
static char * no_pattern[] = { DEFAULT_PATTERN, NULL };
/*-----------------------------------------------------------------------------
** Function*: absolute_file()
** Purpose: Check is the file is an absolute file name.
** In this case make a new path array which contains the absolute
** path only and its location in path. basename is the modified
** file name.
**
** Currently UN*X and MSDOS like file names are supported.
** Arguments:
** name the name of the file
** basename
** path
** Returns: The return value is |true|
** Otherwise |false| is returned and nothing changed.
**___________________________________________________ */
static bool absolute_file(name,basename,path) /* */
char *name; /* */
char **basename; /* */
char ***path; /* */
{ static char *absolut_path[2]; /* */
static int first = (-1); /* */
size_t l; /* */
char *sp; /* */
#undef SEPARATOR
/* */
#ifdef MSDOS
#define SEPARATOR '\\'
if ( *name != SEPARATOR /* starting with root or */
&& ( *name == '\0' /* */
|| *(name+1) != ':' /* */
|| *(name+2) != SEPARATOR ) ) /* with drive */
#endif
#ifdef AMIGA
#define SEPARATOR '/'
if ( strchr(name,':') == NULL ) /* starting with root */
#endif
#ifndef SEPARATOR
#define SEPARATOR '/'
if ( *name != SEPARATOR ) /* starting with root */
#endif
{ return false; } /* */
/* */
sp = strrchr(name,SEPARATOR); /* find last separator */
/* existence guarenteed! */
#ifdef AMIGA
if ( sp == NULL ) sp = strchr(name,':'); /* */
#endif
l = (size_t)(sp-name); /* length of directory. */
if (first) /* */
{ first = 0; /* */
absolut_path[1] = NULL; /* mark end of array. */
absolut_path[0] = malloc(l+1); /* allocate */
} /* or */
else /* reallocate */
{ absolut_path[0] = realloc(*absolut_path,l+1); /* space for the */
} /* directory name */
/* */
(void)strncpy(absolut_path[0],name,l); /* save directory name */
*(absolut_path[0]+l) = '\0'; /* and mark the end. */
/* */
*basename = name+l+1; /* return the base name */
*path = absolut_path; /* return the path array */
/* */
return true; /* finished. */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function: px_fopen()
** Purpose: Open a file using path and pattern.
**
**
** Arguments:
** name (base) name of the file to open.
** mode Mode for opening the file like used with |fopen()|.
** pattern A |NULL| terminated array of patterns.
** path The |NULL| terminated array of directories.
** show A function pointer or |NULL|.
** Returns: A file pointer refering to the file or |NULL|.
**___________________________________________________ */
FILE * px_fopen(name,mode,pattern,path,show) /* */
char * name; /* */
char * mode; /* */
char **pattern; /* */
char **path; /* */
int (*show)_ARG((char*)); /* */
{ char **fmt; /* */
char **pp; /* */
FILE * file; /* */
size_t len,plen; /* */
char **new_path; /* */
char *new_name; /* */
/* */
if ( path == NULL ) path = no_path; /* use default path */
if ( pattern == NULL ) pattern = no_pattern; /* use default pattern */
/* */
if ( absolute_file(name,&new_name,&new_path) ) /* */
{ name = new_name; /* */
path = new_path; /* */
} /* */
/* */
for ( plen=0,fmt=pattern;*fmt;++fmt ) /* compute longest */
{ len = strlen(*fmt); /* pattern */
if ( len > plen ) plen = len; /* */
} /* */
plen += 1+strlen(name); /* add length of name */
/* and 1 for '\0' */
if ( px_len == 0 && /* initial filename */
(px_filename = malloc(plen))==NULL ) /* then allocate or */
return(NULL); /* terminate */
px_len = plen-1; /* usable is 1 less */
/* */
for ( pp=path;*pp;++pp ) /* use all paths */
{ len = strlen(*pp) + plen; /* required space */
if ( px_len < len ) /* if less present get it */
{ char * old = px_filename; /* */
if ( (px_filename = realloc(px_filename,len))==NULL ) {/* */
free(old); /* */
return(NULL); /* */
} /* */
px_len = len-1; /* usable is 1 less */
} /* */
/* */
for ( fmt=pattern;*fmt;++fmt ) /* use all patterns */
{ (void)sprintf(px_filename,*fmt,*pp,name); /* construct new filename */
if ( ( show == NULL || /* if function present */
(*show)(px_filename) ) && /* and it says yes */
(file=fopen(px_filename,mode)) != NULL )/* and open succeeds */
return(file); /* then return file ptr */
} /* */
} /* */
*px_filename = '\0'; /* clear filename */
return(NULL); /* failure */
} /*------------------------*/
#define INIT_SIZE 32
#define INC_SIZE 16
/*-----------------------------------------------------------------------------
** Function: px_s2p()
** Purpose: Translate a path string specification into an array of the
** components.
** The memory of the array is malloced and should be freed when
** not used any longer.
** Arguments:
** s String to analyze
** sep Separator
** Returns: The array of the components
**___________________________________________________ */
char ** px_s2p(s,sep) /* */
char * s; /* */
int sep; /* */
{ register char *cp; /* */
register size_t l = 1; /* */
char **pattern; /* */
int *array; /* */
size_t array_size = INIT_SIZE; /* */
size_t array_ptr = 0; /* */
char *t; /* */
StringBuffer *sb; /* */
/* */
if (s == NULL) return NULL; /* No string to analyze */
/* */
if ( (array=(int*)malloc(array_size*sizeof(int)))/* */
== NULL ) /* */
{ return NULL; } /* */
/* */
t = cp = s; /* */
sb = sbopen(); /* */
for(;;) /* Count the number of */
{ /* fields and expand */
if ( *cp == sep || *cp == '\0' ) /* */
{ if ( array_ptr >= array_size ) /* */
{ array_size += INC_SIZE; /* */
int* old = array; /* */
array = (int*)realloc(array, /* */
array_size*sizeof(int));/* */
if ( array == NULL ) { /* */
free(old); /* */
return NULL; /* */
} /* */
} /* */
array[array_ptr++] = sbtell(sb); /* */
expand_env(t,cp,sb); /* */
sbputchar('\0',sb); /* */
t = cp+1; /* */
if ( *cp ) cp++; /* */
else break; /* */
} /* */
else /* */
{ cp++; /* */
} /* */
} /* */
/* */
l = sbtell(sb); /* */
s = sbflush(sb); /* */
/* */
if ( (pattern=(char**)malloc( (array_ptr+1)*sizeof(char*)/* */
+l*sizeof(char))) /* */
== (char**)NULL ) /* Try to allocate space */
{ return NULL; } /* */
/* */
cp = (char*)&pattern[array_ptr+1]; /* */
(void)memcpy(cp,s,l); /* save the string spec */
/* */
for ( l = 0; l < array_ptr; l++ ) /* */
{ pattern[l] = cp + array[l]; } /* */
pattern[array_ptr] = 0L; /* Mark end */
/* */
(void)free(array); /* */
(void)sbclose(sb); /* */
return pattern; /* */
} /*------------------------*/
/*-----------------------------------------------------------------------------
** Function*: expand_env()
** Type: static char *
** Purpose:
**
** Arguments:
** s
** se
** Returns:
**___________________________________________________ */
static void expand_env(s,se,res) /* */
char * s; /* */
char * se; /* */
StringBuffer * res; /* */
{ /* */
StringBuffer * val = sbopen(); /* */
/* */
for (; s < se; s++) /* */
{ /* */
if (*s == '$') /* */
{ char beg = '\0'; /* */
char * env; /* */
sbrewind(val); /* */
s++; /* */
if ( *s == '{' || *s == '(' ) /* */
{ beg = *(s++); } /* */
while ( isalpha(*s) || isdigit(*s) || *s == '_' )/* */
{ sbputchar(*s,val); /* */
s++; /* */
} /* */
if ( ( beg == '{' && *s == '}' ) || /* */
( beg == '(' && *s == ')' ) /* */
) /* */
{ s++; } /* */
env = sbflush(val); /* */
if (*env) /* */
{ env = getenv(env); /* */
if ( env != NULL ) /* */
{ sbputs(env,res); } /* */
} /* */
} /* */
#ifdef HOME_ENV_VAR
else if (*s == '~') /* */
{ /* */
char * env = getenv(HOME_ENV_VAR); /* */
if (env != NULL) /* */
{ sbputs(env,res); } /* */
} /* */
#endif
else /* */
{ sbputchar(*s,res); /* */
} /* */
} /* */
} /*------------------------*/