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/cvs/deliantra/server/common/porting.c
Revision: 1.4
Committed: Sun Aug 13 17:16:00 2006 UTC (17 years, 9 months ago) by elmex
Content type: text/plain
Branch: MAIN
CVS Tags: HEAD
Changes since 1.3: +0 -0 lines
State: FILE REMOVED
Log Message:
Made server compile with C++.
Removed cfanim plugin and crossedit.
C++ here we come.

File Contents

# Content
1 /*
2 * static char *rcsid_porting_c =
3 * "$Id$";
4 */
5
6 /*
7 CrossFire, A Multiplayer game for X-windows
8
9 Copyright (C) 2002 Mark Wedel & Crossfire Development Team
10 Copyright (C) 1992 Frank Tore Johansen
11
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
16
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
21
22 You should have received a copy of the GNU General Public License
23 along with this program; if not, write to the Free Software
24 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25
26 The authors can be reached via e-mail at crossfire-devel@real-time.com
27 */
28
29 /* This file contains various functions that are not really unique for
30 * crossfire, but rather provides what should be standard functions
31 * for systems that do not have them. In this way, most of the
32 * nasty system dependent stuff is contained here, with the program
33 * calling these functions.
34 */
35
36
37 #ifdef WIN32 /* ---win32 exclude/include headers */
38 #include "process.h"
39 #define pid_t int /* we include it non global, because there is a redefinition in python.h */
40 #else
41 #include <ctype.h>
42 #include <sys/stat.h>
43 #include <sys/wait.h>
44
45 #include <sys/param.h>
46 #include <stdio.h>
47
48 /* Need to pull in the HAVE_... values somehow */
49 /* win32 reminder: always put this in a ifndef win32 block */
50 #include <autoconf.h>
51 #endif
52
53
54 #ifdef HAVE_STDLIB_H
55 #include <stdlib.h>
56 #endif
57
58 #ifdef HAVE_UNISTD_H
59 #include <unistd.h>
60 #endif
61
62 #include <stdarg.h>
63 /* Has to be after above includes so we don't redefine some values */
64 #include "global.h"
65
66 static unsigned int curtmp = 0;
67
68 /*****************************************************************************
69 * File related functions
70 ****************************************************************************/
71
72 /*
73 * A replacement for the tempnam() function since it's not defined
74 * at some unix variants.
75 */
76
77 char *tempnam_local(const char *dir, const char *pfx)
78 {
79 char *name;
80 pid_t pid=getpid();
81
82 /* HURD does not have a hard limit, but we do */
83 #ifndef MAXPATHLEN
84 #define MAXPATHLEN 4096
85 #endif
86
87 if (!(name = (char *) malloc(MAXPATHLEN)))
88 return(NULL);
89
90 if (!pfx)
91 pfx = "cftmp.";
92
93 /* This is a pretty simple method - put the pid as a hex digit and
94 * just keep incrementing the last digit. Check to see if the file
95 * already exists - if so, we'll just keep looking - eventually we should
96 * find one that is free.
97 */
98 if (dir!=NULL) {
99 do {
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 } while (access(name, F_OK)!=-1);
107 return(name);
108 }
109 return(NULL);
110 }
111
112
113
114 /* This function removes everything in the directory. */
115 void remove_directory(const char *path)
116 {
117 DIR *dirp;
118 char buf[MAX_BUF];
119 struct stat statbuf;
120 int status;
121
122 if ((dirp=opendir(path))!=NULL) {
123 struct dirent *de;
124
125 for (de=readdir(dirp); de; de = readdir(dirp)) {
126 /* Don't remove '.' or '..' In theory we should do a better
127 * check for .., but the directories we are removing are fairly
128 * limited and should not have dot files in them.
129 */
130 if (de->d_name[0] == '.') continue;
131
132 /* Linux actually has a type field in the dirent structure,
133 * but that is not portable - stat should be portable
134 */
135 status=stat(de->d_name, &statbuf);
136 if ((status!=-1) && (S_ISDIR(statbuf.st_mode))) {
137 sprintf(buf,"%s/%s", path, de->d_name);
138 remove_directory(buf);
139 continue;
140 }
141 sprintf(buf,"%s/%s", path, de->d_name);
142 if (unlink(buf)) {
143 LOG(llevError,"Unable to remove directory %s\n", path);
144 }
145 }
146 closedir(dirp);
147 }
148 if (rmdir(path)) {
149 LOG(llevError,"Unable to remove directory %s\n", path);
150 }
151 }
152
153 #if defined(sgi)
154
155 #include <stdio.h>
156 #include <stdlib.h>
157 #include <string.h>
158
159 #define popen fixed_popen
160
161 FILE *popen_local(const char *command, const char *type)
162 {
163 int fd[2];
164 int pd;
165 FILE *ret;
166 if (!strcmp(type,"r"))
167 {
168 pd=STDOUT_FILENO;
169 }
170 else if (!strcmp(type,"w"))
171 {
172 pd=STDIN_FILENO;
173 }
174 else
175 {
176 return NULL;
177 }
178 if (pipe(fd)!=-1)
179 {
180 switch (fork())
181 {
182 case -1:
183 close(fd[0]);
184 close(fd[1]);
185 break;
186 case 0:
187 close(fd[0]);
188 if ((fd[1]==pd)||(dup2(fd[1],pd)==pd))
189 {
190 if (fd[1]!=pd)
191 {
192 close(fd[1]);
193 }
194 execl("/bin/sh","sh","-c",command,NULL);
195 close(pd);
196 }
197 exit(1);
198 break;
199 default:
200 close(fd[1]);
201 if (ret=fdopen(fd[0],type))
202 {
203 return ret;
204 }
205 close(fd[0]);
206 break;
207 }
208 }
209 return NULL;
210 }
211
212 #endif /* defined(sgi) */
213
214
215 /*****************************************************************************
216 * String related function
217 ****************************************************************************/
218
219
220
221 /*
222 * A replacement of strdup(), since it's not defined at some
223 * unix variants.
224 */
225 char *strdup_local(const char *str) {
226 char *c=(char *)malloc(sizeof(char)*(strlen(str)+1));
227 strcpy(c,str);
228 return c;
229 }
230
231
232 #define DIGIT(x) (isdigit(x) ? (x) - '0' : \
233 islower (x) ? (x) + 10 - 'a' : (x) + 10 - 'A')
234 #define MBASE ('z' - 'a' + 1 + 10)
235
236 /*
237 * A replacement of strtol() since it's not defined at
238 * many unix systems.
239 */
240
241 long strtol_local(str, ptr, base)
242 register char *str;
243 char **ptr;
244 register int base;
245 {
246 register long val;
247 register int c;
248 int xx, neg = 0;
249
250 if (ptr != (char **) 0)
251 *ptr = str; /* in case no number is formed */
252 if (base < 0 || base > MBASE)
253 return (0); /* base is invalid */
254 if (!isalnum (c = *str)) {
255 while (isspace (c))
256 c = *++str;
257 switch (c) {
258 case '-':
259 neg++;
260 case '+':
261 c = *++str;
262 }
263 }
264 if (base == 0) {
265 if (c != '0')
266 base = 10;
267 else {
268 if (str[1] == 'x' || str[1] == 'X')
269 base = 16;
270 else
271 base = 8;
272 }
273 }
274 /*
275 ** For any base > 10, the digits incrementally following
276 ** 9 are assumed to be "abc...z" or "ABC...Z"
277 */
278 if (!isalnum (c) || (xx = DIGIT (c)) >= base)
279 return 0; /* no number formed */
280 if (base == 16 && c == '0' && isxdigit (str[2]) &&
281 (str[1] == 'x' || str[1] == 'X'))
282 c = *(str += 2); /* skip over leading "0x" or "0X" */
283 for (val = -DIGIT (c); isalnum (c = *++str) && (xx = DIGIT (c)) < base;)
284 /* accumulate neg avoids surprises near
285 MAXLONG */
286 val = base * val - xx;
287 if (ptr != (char **) 0)
288 *ptr = str;
289 return (neg ? val : -val);
290 }
291
292 /* This seems to be lacking on some system */
293 #if !defined(HAVE_STRNCASECMP)
294 int strncasecmp(const char *s1, const char *s2, int n)
295 {
296 register int c1, c2;
297
298 while (*s1 && *s2 && n) {
299 c1 = tolower(*s1);
300 c2 = tolower(*s2);
301 if (c1 != c2)
302 return (c1 - c2);
303 s1++;
304 s2++;
305 n--;
306 }
307 if (!n)
308 return(0);
309 return (int) (*s1 - *s2);
310 }
311 #endif
312
313 #if !defined(HAVE_STRCASECMP)
314 int strcasecmp(const char *s1, const char*s2)
315 {
316 register int c1, c2;
317
318 while (*s1 && *s2) {
319 c1 = tolower(*s1);
320 c2 = tolower(*s2);
321 if (c1 != c2)
322 return (c1 - c2);
323 s1++;
324 s2++;
325 }
326 if (*s1=='\0' && *s2=='\0')
327 return 0;
328 return (int) (*s1 - *s2);
329 }
330 #endif
331
332 char *strcasestr_local(const char *s, const char *find)
333 {
334 char c, sc;
335 size_t len;
336
337 if ((c = *find++) != 0) {
338 c = tolower(c);
339 len = strlen(find);
340 do {
341 do {
342 if ((sc = *s++) == 0)
343 return NULL;
344 } while (tolower(sc) != c);
345 } while (strncasecmp(s, find, len) != 0);
346 s--;
347 }
348 return (char *)s;
349 }
350
351 #if !defined(HAVE_SNPRINTF)
352
353 int snprintf(char *dest, int max, const char *format, ...)
354 {
355 va_list var;
356 int ret;
357
358 va_start(var, format);
359 ret = vsprintf(dest, format, var);
360 va_end(var);
361 if (ret > max) abort();
362
363 return ret;
364 }
365 #endif
366
367
368 /* This takes an err number and returns a string with a description of
369 * the error.
370 */
371 char *strerror_local(int errnum)
372 {
373 #if defined(HAVE_STRERROR)
374 return(strerror(errnum));
375 #else
376 return("strerror_local not implemented");
377 #endif
378 }
379
380 /*
381 * Based on (n+1)^2 = n^2 + 2n + 1
382 * given that 1^2 = 1, then
383 * 2^2 = 1 + (2 + 1) = 1 + 3 = 4
384 * 3^2 = 4 + (4 + 1) = 4 + 5 = 1 + 3 + 5 = 9
385 * 4^2 = 9 + (6 + 1) = 9 + 7 = 1 + 3 + 5 + 7 = 16
386 * ...
387 * In other words, a square number can be express as the sum of the
388 * series n^2 = 1 + 3 + ... + (2n-1)
389 */
390 int
391 isqrt(n)
392 int n;
393 {
394 int result, sum, prev;
395 result = 0;
396 prev = sum = 1;
397 while (sum <= n) {
398 prev += 2;
399 sum += prev;
400 ++result;
401 }
402 return result;
403 }
404
405
406 /*
407 * returns a char-pointer to a static array, in which a representation
408 * of the decimal number given will be stored.
409 */
410
411 char *ltostr10(signed long n) {
412 static char buf[12]; /* maximum size is n=-2 billion, i.e. 11 characters+1
413 character for the trailing nul character */
414 snprintf(buf, sizeof(buf), "%ld", n);
415 return buf;
416 }
417 char *doubletostr10(double v){
418 static char tbuf[200];
419 sprintf(tbuf,"%f",v);
420 return tbuf;
421 }
422
423 /*
424 * A fast routine which appends the name and decimal number specified
425 * to the given buffer.
426 * Could be faster, though, if the strcat()s at the end could be changed
427 * into alternate strcat which returned a pointer to the _end_, not the
428 * start!
429 *
430 * Hey good news, it IS faster now, according to changes in get_ob_diff
431 * Completly redone prototype and made define in loader.l. See changes there.
432 * Didn't touch those for speed reason (don't use them anymore) .
433 * Tchize
434 */
435
436 void save_long(char *buf, char *name, long n) {
437 char buf2[MAX_BUF];
438 strcpy(buf2,name);
439 strcat(buf2," ");
440 strcat(buf2,ltostr10(n));
441 strcat(buf2,"\n");
442 strcat(buf,buf2);
443 }
444
445
446
447 void save_long_long(char *buf, char *name, sint64 n) {
448 char buf2[MAX_BUF];
449
450 #ifndef WIN32
451 sprintf(buf2,"%s %lld\n", name, n);
452 #else
453 sprintf(buf2,"%s %I64d\n", name, n);
454 #endif
455 strcat(buf,buf2);
456 }
457
458 /* This is a list of the suffix, uncompress and compress functions. Thus,
459 * if you have some other compress program you want to use, the only thing
460 * that needs to be done is to extended this.
461 * The first entry must be NULL - this is what is used for non
462 * compressed files.
463 */
464 char *uncomp[NROF_COMPRESS_METHODS][3] = {
465 {NULL, NULL, NULL},
466 {".Z", UNCOMPRESS, COMPRESS},
467 {".gz", GUNZIP, GZIP},
468 {".bz2", BUNZIP, BZIP}
469 };
470
471
472 /**
473 * Open and possibly uncompress a file.
474 *
475 * @param ext the extension if the file is compressed.
476 *
477 * @param uncompressor the command to uncompress the file if the file is
478 * compressed.
479 *
480 * @param name the base file name without compression extension
481 *
482 * @param flag only used for compressed files: if set, uncompress and open the
483 * file; if unset, uncompress the file via pipe
484 *
485 * @param *compressed set to zero if the file was uncompressed
486 */
487 static FILE *open_and_uncompress_file(const char *ext, const char *uncompressor, const char *name, int flag, int *compressed) {
488 struct stat st;
489 char buf[MAX_BUF];
490 char buf2[MAX_BUF];
491 int ret;
492
493 if (ext == NULL) {
494 ext = "";
495 }
496
497 if (strlen(name)+strlen(ext) >= sizeof(buf)) {
498 errno = ENAMETOOLONG; /* File name too long */
499 return NULL;
500 }
501 sprintf(buf, "%s%s", name, ext);
502
503 if (stat(buf, &st) != 0) {
504 return NULL;
505 }
506
507 if (!S_ISREG(st.st_mode)) {
508 errno = EISDIR; /* Not a regular file */
509 return NULL;
510 }
511
512 if (uncompressor == NULL) {
513 /* open without uncompression */
514
515 return fopen(buf, "r");
516 }
517
518 /* The file name buf (and its substring name) is passed as an argument to a
519 * shell command, therefore check for characters that could confuse the
520 * shell.
521 */
522 if (strpbrk(buf, "'\\\r\n") != NULL) {
523 errno = ENOENT; /* Pretend the file does not exist */
524 return NULL;
525 }
526
527 if (!flag) {
528 /* uncompress via pipe */
529
530 if (strlen(uncompressor)+4+strlen(buf)+1 >= sizeof(buf2)) {
531 errno = ENAMETOOLONG; /* File name too long */
532 return NULL;
533 }
534 sprintf(buf2, "%s < '%s'", uncompressor, buf);
535
536 return popen(buf2, "r");
537 }
538
539 /* remove compression from file, then open file */
540
541 if (stat(name, &st) == 0 && !S_ISREG(st.st_mode)) {
542 errno = EISDIR;
543 return NULL;
544 }
545
546 if (strlen(uncompressor)+4+strlen(buf)+5+strlen(name)+1 >= sizeof(buf2)) {
547 errno = ENAMETOOLONG; /* File name too long */
548 return NULL;
549 }
550 sprintf(buf2, "%s < '%s' > '%s'", uncompressor, buf, name);
551
552 ret = system(buf2);
553 if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) {
554 LOG(llevError, "system(%s) returned %d\n", buf2, ret);
555 errno = ENOENT;
556 return NULL;
557 }
558
559 unlink(buf); /* Delete the original */
560 *compressed = 0; /* Change to "uncompressed file" */
561 chmod(name, st.st_mode); /* Copy access mode from compressed file */
562
563 return fopen(name, "r");
564 }
565
566 /**
567 * open_and_uncompress() first searches for the original filename. If it exist,
568 * then it opens it and returns the file-pointer.
569 *
570 * If not, it does two things depending on the flag. If the flag is set, it
571 * tries to create the original file by appending a compression suffix to name
572 * and uncompressing it. If the flag is not set, it creates a pipe that is used
573 * for reading the file (NOTE - you can not use fseek on pipes).
574 *
575 * The compressed pointer is set to nonzero if the file is compressed (and
576 * thus, fp is actually a pipe.) It returns 0 if it is a normal file.
577 */
578 FILE *open_and_uncompress(const char *name, int flag, int *compressed) {
579 size_t i;
580 FILE *fp;
581
582 for (i = 0; i < NROF_COMPRESS_METHODS; i++) {
583 *compressed = i;
584 fp = open_and_uncompress_file(uncomp[i][0], uncomp[i][1], name, flag, compressed);
585 if (fp != NULL) {
586 return fp;
587 }
588 }
589
590 errno = ENOENT;
591 return NULL;
592 }
593
594 /*
595 * See open_and_uncompress().
596 */
597
598 void close_and_delete(FILE *fp, int compressed) {
599 if (compressed)
600 pclose(fp);
601 else
602 fclose(fp);
603 }
604
605 /*
606 * If any directories in the given path doesn't exist, they are created.
607 */
608
609 void make_path_to_file (char *filename)
610 {
611 char buf[MAX_BUF], *cp = buf;
612 struct stat statbuf;
613
614 if (!filename || !*filename)
615 return;
616 strcpy (buf, filename);
617
618 while ((cp = strchr (cp + 1, (int) '/'))) {
619 *cp = '\0';
620 if (stat(buf, &statbuf) || !S_ISDIR (statbuf.st_mode)) {
621 if (mkdir (buf, SAVE_DIR_MODE)) {
622 LOG(llevError, "Cannot mkdir %s: %s\n", buf, strerror_local(errno));
623 return;
624 }
625 }
626 *cp = '/';
627 }
628 }
629