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Comparing deliantra/server/common/porting.C (file contents):
Revision 1.3 by root, Wed Aug 30 16:30:37 2006 UTC vs.
Revision 1.21 by root, Mon Sep 29 08:52:35 2008 UTC

1/* 1/*
2 * static char *rcsid_porting_c = 2 * This file is part of Deliantra, the Roguelike Realtime MMORPG.
3 * "$Id: porting.C,v 1.3 2006/08/30 16:30:37 root Exp $"; 3 *
4 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
6 * Copyright (©) 1992,2007 Frank Tore Johansen
7 *
8 * Deliantra is free software: you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation, either version 3 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 *
21 * The authors can be reached via e-mail to <support@deliantra.net>
4 */ 22 */
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 23
29/* This file contains various functions that are not really unique for 24/* This file contains various functions that are not really unique for
30 * crossfire, but rather provides what should be standard functions 25 * crossfire, but rather provides what should be standard functions
31 * for systems that do not have them. In this way, most of the 26 * for systems that do not have them. In this way, most of the
32 * nasty system dependent stuff is contained here, with the program 27 * nasty system dependent stuff is contained here, with the program
33 * calling these functions. 28 * calling these functions.
34 */ 29 */
35 30
36 31
37#ifdef WIN32 /* ---win32 exclude/include headers */ 32/* Need to pull in the HAVE_... values somehow */
38#include "process.h" 33
39#define pid_t int /* we include it non global, because there is a redefinition in python.h */ 34#include <autoconf.h>
40#else 35
36#include <cstdio>
37#include <cstdlib>
38#include <cstdarg>
39
41#include <ctype.h> 40#include <cctype>
41
42#include <sys/stat.h> 42#include <sys/stat.h>
43#include <sys/wait.h> 43#include <sys/wait.h>
44 44
45#include <sys/param.h> 45#include <sys/param.h>
46#include <stdio.h>
47 46
48/* Need to pull in the HAVE_... values somehow */
49/* win32 reminder: always put this in a ifndef win32 block */
50#include <autoconf.h> 47#include <unistd.h>
51#endif
52 48
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 */ 49/* Has to be after above includes so we don't redefine some values */
64#include "global.h" 50#include "global.h"
65
66static 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
77char *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. */
115void 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
161FILE *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 */
225char *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 51
232#define DIGIT(x) (isdigit(x) ? (x) - '0' : \ 52#define DIGIT(x) (isdigit(x) ? (x) - '0' : \
233islower (x) ? (x) + 10 - 'a' : (x) + 10 - 'A') 53islower (x) ? (x) + 10 - 'a' : (x) + 10 - 'A')
234#define MBASE ('z' - 'a' + 1 + 10) 54#define MBASE ('z' - 'a' + 1 + 10)
235 55
236/* This seems to be lacking on some system */ 56char *
237#if !defined(HAVE_STRNCASECMP)
238int strncasecmp(const char *s1, const char *s2, int n) 57strcasestr_local (const char *s, const char *find)
239{ 58{
240 register int c1, c2; 59 char c, sc;
60 size_t len;
241 61
242 while (*s1 && *s2 && n) {
243 c1 = tolower(*s1);
244 c2 = tolower(*s2);
245 if (c1 != c2)
246 return (c1 - c2);
247 s1++;
248 s2++;
249 n--;
250 }
251 if (!n)
252 return(0);
253 return (int) (*s1 - *s2);
254}
255#endif
256
257#if !defined(HAVE_STRCASECMP)
258int strcasecmp(const char *s1, const char*s2)
259{
260 register int c1, c2;
261
262 while (*s1 && *s2) {
263 c1 = tolower(*s1);
264 c2 = tolower(*s2);
265 if (c1 != c2)
266 return (c1 - c2);
267 s1++;
268 s2++;
269 }
270 if (*s1=='\0' && *s2=='\0')
271 return 0;
272 return (int) (*s1 - *s2);
273}
274#endif
275
276char *strcasestr_local(const char *s, const char *find)
277{
278 char c, sc;
279 size_t len;
280
281 if ((c = *find++) != 0) { 62 if ((c = *find++) != 0)
63 {
282 c = tolower(c); 64 c = tolower (c);
283 len = strlen(find); 65 len = strlen (find);
66 do
284 do { 67 {
68 do
285 do { 69 {
286 if ((sc = *s++) == 0) 70 if ((sc = *s++) == 0)
287 return NULL; 71 return NULL;
72 }
288 } while (tolower(sc) != c); 73 while (tolower (sc) != c);
289 } while (strncasecmp(s, find, len) != 0);
290 s--;
291 }
292 return (char *)s;
293}
294
295#if !defined(HAVE_SNPRINTF)
296
297int snprintf(char *dest, int max, const char *format, ...)
298{
299 va_list var;
300 int ret;
301
302 va_start(var, format);
303 ret = vsprintf(dest, format, var);
304 va_end(var);
305 if (ret > max) abort();
306
307 return ret;
308}
309#endif
310
311
312/*
313 * Based on (n+1)^2 = n^2 + 2n + 1
314 * given that 1^2 = 1, then
315 * 2^2 = 1 + (2 + 1) = 1 + 3 = 4
316 * 3^2 = 4 + (4 + 1) = 4 + 5 = 1 + 3 + 5 = 9
317 * 4^2 = 9 + (6 + 1) = 9 + 7 = 1 + 3 + 5 + 7 = 16
318 * ...
319 * In other words, a square number can be express as the sum of the
320 * series n^2 = 1 + 3 + ... + (2n-1)
321 */
322int
323isqrt(int n)
324{
325 int result, sum, prev;
326 result = 0;
327 prev = sum = 1;
328 while (sum <= n) {
329 prev += 2;
330 sum += prev;
331 ++result;
332 } 74 }
333 return result; 75 while (strncasecmp (s, find, len) != 0);
334} 76 s--;
335
336
337/*
338 * returns a char-pointer to a static array, in which a representation
339 * of the decimal number given will be stored.
340 */
341
342char *ltostr10(signed long n) {
343 static char buf[12]; /* maximum size is n=-2 billion, i.e. 11 characters+1
344 character for the trailing nul character */
345 snprintf(buf, sizeof(buf), "%ld", n);
346 return buf;
347}
348char *doubletostr10(double v){
349 static char tbuf[200];
350 sprintf(tbuf,"%f",v);
351 return tbuf;
352}
353
354/**
355 * Open and possibly uncompress a file.
356 *
357 * @param ext the extension if the file is compressed.
358 *
359 * @param uncompressor the command to uncompress the file if the file is
360 * compressed.
361 *
362 * @param name the base file name without compression extension
363 *
364 * @param flag only used for compressed files: if set, uncompress and open the
365 * file; if unset, uncompress the file via pipe
366 *
367 * @param *compressed set to zero if the file was uncompressed
368 */
369static FILE *open_and_uncompress_file(const char *ext, const char *uncompressor, const char *name, int flag, int *compressed) {
370 struct stat st;
371 char buf[MAX_BUF];
372 char buf2[MAX_BUF];
373 int ret;
374
375 if (ext == NULL) {
376 ext = "";
377 } 77 }
378 78 return (char *) s;
379 if (strlen(name)+strlen(ext) >= sizeof(buf)) {
380 errno = ENAMETOOLONG; /* File name too long */
381 return NULL;
382 }
383 sprintf(buf, "%s%s", name, ext);
384
385 if (stat(buf, &st) != 0) {
386 return NULL;
387 }
388
389 if (!S_ISREG(st.st_mode)) {
390 errno = EISDIR; /* Not a regular file */
391 return NULL;
392 }
393
394 if (uncompressor == NULL) {
395 /* open without uncompression */
396
397 return fopen(buf, "r");
398 }
399
400 /* The file name buf (and its substring name) is passed as an argument to a
401 * shell command, therefore check for characters that could confuse the
402 * shell.
403 */
404 if (strpbrk(buf, "'\\\r\n") != NULL) {
405 errno = ENOENT; /* Pretend the file does not exist */
406 return NULL;
407 }
408
409 if (!flag) {
410 /* uncompress via pipe */
411
412 if (strlen(uncompressor)+4+strlen(buf)+1 >= sizeof(buf2)) {
413 errno = ENAMETOOLONG; /* File name too long */
414 return NULL;
415 }
416 sprintf(buf2, "%s < '%s'", uncompressor, buf);
417
418 return popen(buf2, "r");
419 }
420
421 /* remove compression from file, then open file */
422
423 if (stat(name, &st) == 0 && !S_ISREG(st.st_mode)) {
424 errno = EISDIR;
425 return NULL;
426 }
427
428 if (strlen(uncompressor)+4+strlen(buf)+5+strlen(name)+1 >= sizeof(buf2)) {
429 errno = ENAMETOOLONG; /* File name too long */
430 return NULL;
431 }
432 sprintf(buf2, "%s < '%s' > '%s'", uncompressor, buf, name);
433
434 ret = system(buf2);
435 if (!WIFEXITED(ret) || WEXITSTATUS(ret) != 0) {
436 LOG(llevError, "system(%s) returned %d\n", buf2, ret);
437 errno = ENOENT;
438 return NULL;
439 }
440
441 unlink(buf); /* Delete the original */
442 *compressed = 0; /* Change to "uncompressed file" */
443 chmod(name, st.st_mode); /* Copy access mode from compressed file */
444
445 return fopen(name, "r");
446} 79}
447 80
448/** 81/**
449 * open_and_uncompress() first searches for the original filename. If it exist, 82 * open_and_uncompress() first searches for the original filename. If it exist,
450 * then it opens it and returns the file-pointer. 83 * then it opens it and returns the file-pointer.
451 *
452 * If not, it does two things depending on the flag. If the flag is set, it
453 * tries to create the original file by appending a compression suffix to name
454 * and uncompressing it. If the flag is not set, it creates a pipe that is used
455 * for reading the file (NOTE - you can not use fseek on pipes).
456 *
457 * The compressed pointer is set to nonzero if the file is compressed (and
458 * thus, fp is actually a pipe.) It returns 0 if it is a normal file.
459 */ 84 */
85FILE *
460FILE *open_and_uncompress(const char *name, int flag, int *compressed) { 86open_and_uncompress (const char *name, int flag, int *compressed)
461 size_t i; 87{
462 FILE *fp; 88 *compressed = 0;
463 89 return fopen (name, "r");
464 fp = open_and_uncompress_file(0,0, name, flag, compressed);
465 if (fp != NULL) {
466 return fp;
467 }
468
469 errno = ENOENT;
470 return NULL;
471} 90}
472 91
473/* 92/*
474 * See open_and_uncompress(). 93 * See open_and_uncompress().
475 */ 94 */
476 95
96void
477void close_and_delete(FILE *fp, int compressed) { 97close_and_delete (FILE * fp, int compressed)
478 if (compressed) 98{
479 pclose(fp);
480 else
481 fclose(fp); 99 fclose (fp);
482} 100}
483 101
484/*
485 * If any directories in the given path doesn't exist, they are created.
486 */
487
488void make_path_to_file (char *filename)
489{
490 char buf[MAX_BUF], *cp = buf;
491 struct stat statbuf;
492
493 if (!filename || !*filename)
494 return;
495 strcpy (buf, filename);
496
497 while ((cp = strchr (cp + 1, (int) '/'))) {
498 *cp = '\0';
499 if (stat(buf, &statbuf) || !S_ISDIR (statbuf.st_mode)) {
500 if (mkdir (buf, SAVE_DIR_MODE)) {
501 LOG(llevError, "Cannot mkdir %s: %s\n", buf, strerror(errno));
502 return;
503 }
504 }
505 *cp = '/';
506 }
507}
508

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