1 |
/* |
2 |
CrossFire, A Multiplayer game for X-windows |
3 |
|
4 |
Copyright (C) 2002 Mark Wedel & Crossfire Development Team |
5 |
Copyright (C) 1992 Frank Tore Johansen |
6 |
|
7 |
This program is free software; you can redistribute it and/or modify |
8 |
it under the terms of the GNU General Public License as published by |
9 |
the Free Software Foundation; either version 2 of the License, or |
10 |
(at your option) any later version. |
11 |
|
12 |
This program is distributed in the hope that it will be useful, |
13 |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 |
GNU General Public License for more details. |
16 |
|
17 |
You should have received a copy of the GNU General Public License |
18 |
along with this program; if not, write to the Free Software |
19 |
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
20 |
|
21 |
The authors can be reached via e-mail at <crossfire@schmorp.de> |
22 |
*/ |
23 |
|
24 |
/* This file contains various functions that are not really unique for |
25 |
* crossfire, but rather provides what should be standard functions |
26 |
* for systems that do not have them. In this way, most of the |
27 |
* nasty system dependent stuff is contained here, with the program |
28 |
* calling these functions. |
29 |
*/ |
30 |
|
31 |
|
32 |
#ifdef WIN32 /* ---win32 exclude/include headers */ |
33 |
# include "process.h" |
34 |
# define pid_t int /* we include it non global, because there is a redefinition in python.h */ |
35 |
#else |
36 |
# include <ctype.h> |
37 |
# include <sys/stat.h> |
38 |
# include <sys/wait.h> |
39 |
|
40 |
# include <sys/param.h> |
41 |
# include <stdio.h> |
42 |
|
43 |
/* Need to pull in the HAVE_... values somehow */ |
44 |
|
45 |
/* win32 reminder: always put this in a ifndef win32 block */ |
46 |
# include <autoconf.h> |
47 |
#endif |
48 |
|
49 |
|
50 |
#ifdef HAVE_STDLIB_H |
51 |
# include <stdlib.h> |
52 |
#endif |
53 |
|
54 |
#ifdef HAVE_UNISTD_H |
55 |
# include <unistd.h> |
56 |
#endif |
57 |
|
58 |
#include <stdarg.h> |
59 |
|
60 |
/* Has to be after above includes so we don't redefine some values */ |
61 |
#include "global.h" |
62 |
|
63 |
static unsigned int curtmp = 0; |
64 |
|
65 |
/***************************************************************************** |
66 |
* File related functions |
67 |
****************************************************************************/ |
68 |
|
69 |
/* |
70 |
* A replacement for the tempnam() function since it's not defined |
71 |
* at some unix variants. |
72 |
*/ |
73 |
|
74 |
char * |
75 |
tempnam_local (const char *dir, const char *pfx) |
76 |
{ |
77 |
char *name; |
78 |
pid_t pid = getpid (); |
79 |
|
80 |
/* HURD does not have a hard limit, but we do */ |
81 |
#ifndef MAXPATHLEN |
82 |
# define MAXPATHLEN 4096 |
83 |
#endif |
84 |
|
85 |
if (!(name = (char *) malloc (MAXPATHLEN))) |
86 |
return (NULL); |
87 |
|
88 |
if (!pfx) |
89 |
pfx = "cftmp."; |
90 |
|
91 |
/* This is a pretty simple method - put the pid as a hex digit and |
92 |
* just keep incrementing the last digit. Check to see if the file |
93 |
* already exists - if so, we'll just keep looking - eventually we should |
94 |
* find one that is free. |
95 |
*/ |
96 |
if (dir != NULL) |
97 |
{ |
98 |
do |
99 |
{ |
100 |
#ifdef HAVE_SNPRINTF |
101 |
(void) snprintf (name, MAXPATHLEN, "%s/%s%hx.%d", dir, pfx, pid, curtmp); |
102 |
#else |
103 |
(void) sprintf (name, "%s/%s%hx%d", dir, pfx, pid, curtmp); |
104 |
#endif |
105 |
curtmp++; |
106 |
} |
107 |
while (access (name, F_OK) != -1); |
108 |
return (name); |
109 |
} |
110 |
return (NULL); |
111 |
} |
112 |
|
113 |
|
114 |
|
115 |
/* This function removes everything in the directory. */ |
116 |
void |
117 |
remove_directory (const char *path) |
118 |
{ |
119 |
DIR *dirp; |
120 |
char buf[MAX_BUF]; |
121 |
struct stat statbuf; |
122 |
int status; |
123 |
|
124 |
if ((dirp = opendir (path)) != NULL) |
125 |
{ |
126 |
struct dirent *de; |
127 |
|
128 |
for (de = readdir (dirp); de; de = readdir (dirp)) |
129 |
{ |
130 |
/* Don't remove '.' or '..' In theory we should do a better |
131 |
* check for .., but the directories we are removing are fairly |
132 |
* limited and should not have dot files in them. |
133 |
*/ |
134 |
if (de->d_name[0] == '.') |
135 |
continue; |
136 |
|
137 |
/* Linux actually has a type field in the dirent structure, |
138 |
* but that is not portable - stat should be portable |
139 |
*/ |
140 |
status = stat (de->d_name, &statbuf); |
141 |
if ((status != -1) && (S_ISDIR (statbuf.st_mode))) |
142 |
{ |
143 |
sprintf (buf, "%s/%s", path, de->d_name); |
144 |
remove_directory (buf); |
145 |
continue; |
146 |
} |
147 |
sprintf (buf, "%s/%s", path, de->d_name); |
148 |
if (unlink (buf)) |
149 |
{ |
150 |
LOG (llevError, "Unable to remove directory %s\n", path); |
151 |
} |
152 |
} |
153 |
closedir (dirp); |
154 |
} |
155 |
if (rmdir (path)) |
156 |
{ |
157 |
LOG (llevError, "Unable to remove directory %s\n", path); |
158 |
} |
159 |
} |
160 |
|
161 |
#if defined(sgi) |
162 |
|
163 |
# include <stdio.h> |
164 |
# include <stdlib.h> |
165 |
# include <string.h> |
166 |
|
167 |
# define popen fixed_popen |
168 |
|
169 |
FILE * |
170 |
popen_local (const char *command, const char *type) |
171 |
{ |
172 |
int fd[2]; |
173 |
int pd; |
174 |
FILE *ret; |
175 |
|
176 |
if (!strcmp (type, "r")) |
177 |
pd = STDOUT_FILENO; |
178 |
else if (!strcmp (type, "w")) |
179 |
pd = STDIN_FILENO; |
180 |
else |
181 |
return NULL; |
182 |
|
183 |
if (pipe (fd) != -1) |
184 |
{ |
185 |
switch (fork ()) |
186 |
{ |
187 |
case -1: |
188 |
close (fd[0]); |
189 |
close (fd[1]); |
190 |
break; |
191 |
case 0: |
192 |
close (fd[0]); |
193 |
if ((fd[1] == pd) || (dup2 (fd[1], pd) == pd)) |
194 |
{ |
195 |
if (fd[1] != pd) |
196 |
{ |
197 |
close (fd[1]); |
198 |
} |
199 |
execl ("/bin/sh", "sh", "-c", command, NULL); |
200 |
close (pd); |
201 |
} |
202 |
_exit (1); |
203 |
break; |
204 |
default: |
205 |
close (fd[1]); |
206 |
if (ret = fdopen (fd[0], type)) |
207 |
{ |
208 |
return ret; |
209 |
} |
210 |
close (fd[0]); |
211 |
break; |
212 |
} |
213 |
} |
214 |
return NULL; |
215 |
} |
216 |
|
217 |
#endif /* defined(sgi) */ |
218 |
|
219 |
|
220 |
/***************************************************************************** |
221 |
* String related function |
222 |
****************************************************************************/ |
223 |
|
224 |
/* |
225 |
* A replacement of strdup(), since it's not defined at some |
226 |
* unix variants. |
227 |
*/ |
228 |
char * |
229 |
strdup_local (const char *str) |
230 |
{ |
231 |
char *c = (char *) malloc (sizeof (char) * (strlen (str) + 1)); |
232 |
|
233 |
strcpy (c, str); |
234 |
return c; |
235 |
} |
236 |
|
237 |
|
238 |
#define DIGIT(x) (isdigit(x) ? (x) - '0' : \ |
239 |
islower (x) ? (x) + 10 - 'a' : (x) + 10 - 'A') |
240 |
#define MBASE ('z' - 'a' + 1 + 10) |
241 |
|
242 |
/* This seems to be lacking on some system */ |
243 |
#if !defined(HAVE_STRNCASECMP) |
244 |
int |
245 |
strncasecmp (const char *s1, const char *s2, int n) |
246 |
{ |
247 |
register int c1, c2; |
248 |
|
249 |
while (*s1 && *s2 && n) |
250 |
{ |
251 |
c1 = tolower (*s1); |
252 |
c2 = tolower (*s2); |
253 |
if (c1 != c2) |
254 |
return (c1 - c2); |
255 |
s1++; |
256 |
s2++; |
257 |
n--; |
258 |
} |
259 |
if (!n) |
260 |
return (0); |
261 |
return (int) (*s1 - *s2); |
262 |
} |
263 |
#endif |
264 |
|
265 |
#if !defined(HAVE_STRCASECMP) |
266 |
int |
267 |
strcasecmp (const char *s1, const char *s2) |
268 |
{ |
269 |
register int c1, c2; |
270 |
|
271 |
while (*s1 && *s2) |
272 |
{ |
273 |
c1 = tolower (*s1); |
274 |
c2 = tolower (*s2); |
275 |
if (c1 != c2) |
276 |
return (c1 - c2); |
277 |
s1++; |
278 |
s2++; |
279 |
} |
280 |
if (*s1 == '\0' && *s2 == '\0') |
281 |
return 0; |
282 |
return (int) (*s1 - *s2); |
283 |
} |
284 |
#endif |
285 |
|
286 |
char * |
287 |
strcasestr_local (const char *s, const char *find) |
288 |
{ |
289 |
char c, sc; |
290 |
size_t len; |
291 |
|
292 |
if ((c = *find++) != 0) |
293 |
{ |
294 |
c = tolower (c); |
295 |
len = strlen (find); |
296 |
do |
297 |
{ |
298 |
do |
299 |
{ |
300 |
if ((sc = *s++) == 0) |
301 |
return NULL; |
302 |
} |
303 |
while (tolower (sc) != c); |
304 |
} |
305 |
while (strncasecmp (s, find, len) != 0); |
306 |
s--; |
307 |
} |
308 |
return (char *) s; |
309 |
} |
310 |
|
311 |
#if !defined(HAVE_SNPRINTF) |
312 |
|
313 |
int |
314 |
snprintf (char *dest, int max, const char *format, ...) |
315 |
{ |
316 |
va_list var; |
317 |
int ret; |
318 |
|
319 |
va_start (var, format); |
320 |
ret = vsprintf (dest, format, var); |
321 |
va_end (var); |
322 |
if (ret > max) |
323 |
abort (); |
324 |
|
325 |
return ret; |
326 |
} |
327 |
#endif |
328 |
|
329 |
|
330 |
/* |
331 |
* Based on (n+1)^2 = n^2 + 2n + 1 |
332 |
* given that 1^2 = 1, then |
333 |
* 2^2 = 1 + (2 + 1) = 1 + 3 = 4 |
334 |
* 3^2 = 4 + (4 + 1) = 4 + 5 = 1 + 3 + 5 = 9 |
335 |
* 4^2 = 9 + (6 + 1) = 9 + 7 = 1 + 3 + 5 + 7 = 16 |
336 |
* ... |
337 |
* In other words, a square number can be express as the sum of the |
338 |
* series n^2 = 1 + 3 + ... + (2n-1) |
339 |
*/ |
340 |
int |
341 |
isqrt (int n) |
342 |
{ |
343 |
int result, sum, prev; |
344 |
|
345 |
result = 0; |
346 |
prev = sum = 1; |
347 |
while (sum <= n) |
348 |
{ |
349 |
prev += 2; |
350 |
sum += prev; |
351 |
++result; |
352 |
} |
353 |
return result; |
354 |
} |
355 |
|
356 |
|
357 |
/* |
358 |
* returns a char-pointer to a static array, in which a representation |
359 |
* of the decimal number given will be stored. |
360 |
*/ |
361 |
|
362 |
char * |
363 |
ltostr10 (signed long n) |
364 |
{ |
365 |
static char buf[12]; /* maximum size is n=-2 billion, i.e. 11 characters+1 |
366 |
character for the trailing nul character */ |
367 |
snprintf (buf, sizeof (buf), "%ld", n); |
368 |
return buf; |
369 |
} |
370 |
|
371 |
char * |
372 |
doubletostr10 (double v) |
373 |
{ |
374 |
static char tbuf[200]; |
375 |
|
376 |
sprintf (tbuf, "%f", v); |
377 |
return tbuf; |
378 |
} |
379 |
|
380 |
/** |
381 |
* open_and_uncompress() first searches for the original filename. If it exist, |
382 |
* then it opens it and returns the file-pointer. |
383 |
*/ |
384 |
FILE * |
385 |
open_and_uncompress (const char *name, int flag, int *compressed) |
386 |
{ |
387 |
size_t i; |
388 |
FILE *fp; |
389 |
|
390 |
*compressed = 0; |
391 |
return fopen (name, "r"); |
392 |
} |
393 |
|
394 |
/* |
395 |
* See open_and_uncompress(). |
396 |
*/ |
397 |
|
398 |
void |
399 |
close_and_delete (FILE * fp, int compressed) |
400 |
{ |
401 |
fclose (fp); |
402 |
} |
403 |
|
404 |
/* |
405 |
* If any directories in the given path doesn't exist, they are created. |
406 |
*/ |
407 |
|
408 |
void |
409 |
make_path_to_file (char *filename) |
410 |
{ |
411 |
char buf[MAX_BUF], *cp = buf; |
412 |
struct stat statbuf; |
413 |
|
414 |
if (!filename || !*filename) |
415 |
return; |
416 |
strcpy (buf, filename); |
417 |
|
418 |
while ((cp = strchr (cp + 1, (int) '/'))) |
419 |
{ |
420 |
*cp = '\0'; |
421 |
if (stat (buf, &statbuf) || !S_ISDIR (statbuf.st_mode)) |
422 |
{ |
423 |
if (mkdir (buf, SAVE_DIR_MODE)) |
424 |
{ |
425 |
LOG (llevError, "Cannot mkdir %s: %s\n", buf, strerror (errno)); |
426 |
return; |
427 |
} |
428 |
} |
429 |
*cp = '/'; |
430 |
} |
431 |
} |