1 const char miscutil_rcs[] = "$Id: miscutil.c,v 1.14 2001/06/29 21:45:41 oes Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/miscutil.c,v $
6 * Purpose : zalloc, hash_string, safe_strerror, strcmpic,
7 * strncmpic, strsav, chomp, and MinGW32 strdup
9 * These are each too small to deserve their own file
10 * but don't really fit in any other file.
12 * Copyright : Written by and Copyright (C) 2001 the SourceForge
13 * IJBSWA team. http://ijbswa.sourceforge.net
15 * Based on the Internet Junkbuster originally written
16 * by and Copyright (C) 1997 Anonymous Coders and
17 * Junkbusters Corporation. http://www.junkbusters.com
19 * This program is free software; you can redistribute it
20 * and/or modify it under the terms of the GNU General
21 * Public License as published by the Free Software
22 * Foundation; either version 2 of the License, or (at
23 * your option) any later version.
25 * This program is distributed in the hope that it will
26 * be useful, but WITHOUT ANY WARRANTY; without even the
27 * implied warranty of MERCHANTABILITY or FITNESS FOR A
28 * PARTICULAR PURPOSE. See the GNU General Public
29 * License for more details.
31 * The GNU General Public License should be included with
32 * this file. If not, you can view it at
33 * http://www.gnu.org/copyleft/gpl.html
34 * or write to the Free Software Foundation, Inc., 59
35 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
38 * $Log: miscutil.c,v $
39 * Revision 1.14 2001/06/29 21:45:41 oes
40 * Indentation, CRLF->LF, Tab-> Space
42 * Revision 1.13 2001/06/29 13:32:14 oes
43 * Removed logentry from cancelled commit
45 * Revision 1.12 2001/06/09 10:55:28 jongfoster
46 * Changing BUFSIZ ==> BUFFER_SIZE
48 * Revision 1.11 2001/06/07 23:09:19 jongfoster
49 * Cosmetic indentation changes.
51 * Revision 1.10 2001/06/07 14:51:38 joergs
52 * make_path() no longer adds '/' if the dir already ends in '/'.
54 * Revision 1.9 2001/06/07 14:43:17 swa
55 * slight mistake in make_path, unix path style is /.
57 * Revision 1.8 2001/06/05 22:32:01 jongfoster
58 * New function make_path() to splice directory and file names together.
60 * Revision 1.7 2001/06/03 19:12:30 oes
63 * Revision 1.6 2001/06/01 18:14:49 jongfoster
64 * Changing the calls to strerr() to check HAVE_STRERR (which is defined
65 * in config.h if appropriate) rather than the NO_STRERR macro.
67 * Revision 1.5 2001/06/01 10:31:51 oes
68 * Added character class matching to trivimatch; renamed to simplematch
70 * Revision 1.4 2001/05/31 17:32:31 oes
72 * - Enhanced domain part globbing with infix and prefix asterisk
73 * matching and optional unanchored operation
75 * Revision 1.3 2001/05/29 23:10:09 oes
78 * - Introduced chomp()
79 * - Moved strsav() from showargs to miscutil
81 * Revision 1.2 2001/05/29 09:50:24 jongfoster
82 * Unified blocklist/imagelist/permissionslist.
83 * File format is still under discussion, but the internal changes
86 * Also modified interceptor behaviour:
87 * - We now intercept all URLs beginning with one of the following
88 * prefixes (and *only* these prefixes):
90 * * http://ijbswa.sf.net/config/
91 * * http://ijbswa.sourceforge.net/config/
92 * - New interceptors "home page" - go to http://i.j.b/ to see it.
93 * - Internal changes so that intercepted and fast redirect pages
94 * are not replaced with an image.
95 * - Interceptors now have the option to send a binary page direct
96 * to the client. (i.e. ijb-send-banner uses this)
97 * - Implemented show-url-info interceptor. (Which is why I needed
98 * the above interceptors changes - a typical URL is
99 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
100 * The previous mechanism would not have intercepted that, and
101 * if it had been intercepted then it then it would have replaced
104 * Revision 1.1.1.1 2001/05/15 13:59:00 oes
105 * Initial import of version 2.9.3 source tree
108 *********************************************************************/
120 * FIXME: Only need project.h for BUFFER_SIZE. It would be nice
121 * to remove this dependency.
124 #include "miscutil.h"
127 const char miscutil_h_rcs[] = MISCUTIL_H_VERSION;
129 /* Fix a problem with Solaris. There should be no effect on other
131 * Solaris's isspace() is a macro which uses it's argument directly
132 * as an array index. Therefore we need to make sure that high-bit
133 * characters generate +ve values, and ideally we also want to make
134 * the argument match the declared parameter type of "int".
136 #define ijb_tolower(__X) tolower((int)(unsigned char)(__X))
137 #define ijb_isspace(__X) isspace((int)(unsigned char)(__X))
139 /*********************************************************************
143 * Description : Malloc some memory and set it to '\0'.
144 * The way calloc() ought to be -acjc
147 * 1 : size = Size of memory chunk to return.
149 * Returns : Pointer to newly malloc'd memory chunk.
151 *********************************************************************/
152 void *zalloc(int size)
156 if ((ret = (void *)malloc(size)) != NULL)
158 memset(ret, 0, size);
165 /*********************************************************************
167 * Function : hash_string
169 * Description : Take a string and compute a (hopefuly) unique numeric
170 * integer value. This has several uses, but being able
171 * to "switch" a string the one of my favorites.
174 * 1 : s : string to be hashed.
176 * Returns : an unsigned long variable with the hashed value.
178 *********************************************************************/
179 unsigned long hash_string( const char* s )
181 unsigned long h = 0ul;
194 /*********************************************************************
198 * Description : For some reason (which is beyond me), gcc and WIN32
199 * don't like strdup. When a "free" is executed on a
200 * strdup'd ptr, it can at times freez up! So I just
201 * replaced it and problem was solved.
204 * 1 : s = string to duplicate
206 * Returns : Pointer to newly malloc'ed copy of the string.
208 *********************************************************************/
209 char *strdup( const char *s )
211 char * result = (char *)malloc( strlen(s)+1 );
221 #endif /* def __MINGW32__ */
225 /*********************************************************************
227 * Function : safe_strerror
229 * Description : Variant of the library routine strerror() which will
230 * work on systems without the library routine, and
231 * which should never return NULL.
234 * 1 : err = the `errno' of the last operation.
236 * Returns : An "English" string of the last `errno'. Allocated
237 * with strdup(), so caller frees. May be NULL if the
238 * system is out of memory.
240 *********************************************************************/
241 char *safe_strerror(int err)
244 char buf[BUFFER_SIZE];
249 #endif /* HAVE_STRERROR */
253 sprintf(buf, "(errno = %d)", err);
262 /*********************************************************************
264 * Function : strcmpic
266 * Description : Case insensitive string comparison
269 * 1 : s1 = string 1 to compare
270 * 2 : s2 = string 2 to compare
272 * Returns : 0 if s1==s2, Negative if s1<s2, Positive if s1>s2
274 *********************************************************************/
275 int strcmpic(const char *s1, const char *s2)
279 if ( ( *s1 != *s2 ) && ( ijb_tolower(*s1) != ijb_tolower(*s2) ) )
285 return(ijb_tolower(*s1) - ijb_tolower(*s2));
290 /*********************************************************************
292 * Function : strncmpic
294 * Description : Case insensitive string comparison (upto n characters)
297 * 1 : s1 = string 1 to compare
298 * 2 : s2 = string 2 to compare
299 * 3 : n = maximum characters to compare
301 * Returns : 0 if s1==s2, Negative if s1<s2, Positive if s1>s2
303 *********************************************************************/
304 int strncmpic(const char *s1, const char *s2, size_t n)
306 if (n <= 0) return(0);
310 if ( ( *s1 != *s2 ) && ( ijb_tolower(*s1) != ijb_tolower(*s2) ) )
319 return(ijb_tolower(*s1) - ijb_tolower(*s2));
324 /*********************************************************************
328 * Description : In-situ-eliminate all leading and trailing whitespace
332 * 1 : s : string to be chomped.
334 * Returns : chomped string
336 *********************************************************************/
337 char *chomp(char *string)
342 * strip trailing whitespace
344 p = string + strlen(string);
345 while (p > string && ijb_isspace(*(p-1)))
352 * find end of leading whitespace
355 while (*q && ijb_isspace(*q))
361 * if there was any, move the rest forwards
375 /*********************************************************************
379 * Description : Reallocate "old" and append text to it. This makes
380 * it easier to append to malloc'd strings.
383 * 1 : old = Old text that is to be extended. Will be
384 * free()d by this routine.
385 * 2 : text_to_append = Text to be appended to old.
387 * Returns : Pointer to newly malloc'ed appended string.
388 * If there is no text to append, return old. Caller
391 *********************************************************************/
392 char *strsav(char *old, const char *text_to_append)
394 int old_len, new_len;
397 if (( text_to_append == NULL) || (*text_to_append == '\0'))
404 old_len = strlen(old);
411 new_len = old_len + strlen(text_to_append) + 1;
415 if ((p = realloc(old, new_len)) == NULL)
417 log_error(LOG_LEVEL_FATAL, "realloc(%d) bytes failed!", new_len);
418 /* Never get here - LOG_LEVEL_FATAL causes program exit */
423 if ((p = (char *)malloc(new_len)) == NULL)
425 log_error(LOG_LEVEL_FATAL, "malloc(%d) bytes failed!", new_len);
426 /* Never get here - LOG_LEVEL_FATAL causes program exit */
430 strcpy(p + old_len, text_to_append);
436 /*********************************************************************
438 * Function : simplematch
440 * Description : String matching, with a (greedy) '*' wildcard that
441 * stands for zero or more arbitrary characters and
442 * character classes in [], which take both enumerations
446 * 1 : pattern = pattern for matching
447 * 2 : text = text to be matched
449 * Returns : 0 if match, else nonzero
451 *********************************************************************/
452 int simplematch(char *pattern, char *text)
461 unsigned char charmap[32];
467 /* EOF pattern but !EOF text? */
473 /* '*' in the pattern? */
477 /* The pattern ends afterwards? Speed up the return. */
483 /* Else, set wildcard mode and remember position after '*' */
488 /* Character range specification? */
491 memset(charmap, '\0', sizeof(charmap));
493 while (*++pat != ']')
499 else if (*pat == '-')
501 if ((*++pat == ']') || *pat == '\0')
505 for(i = lastchar; i <= *pat; i++)
507 charmap[i / 8] |= (1 << (i % 8));
512 charmap[*pat / 8] |= (1 << (*pat % 8));
516 } /* -END- if Character range specification */
519 /* Compare: Char match, or char range match*/
521 || ((*pat == ']') && (charmap[*txt / 8] & (1 << (*txt % 8)))) )
523 /* Sucess, go ahead */
528 /* In wildcard mode, just try again after failiure */
543 /* Cut off extra '*'s */
544 if(*pat == '*') pat++;
546 /* If this is the pattern's end, fine! */
552 /*********************************************************************
556 * Description : Duplicate the first n characters of a string that may
557 * contain '\0' characters.
560 * 1 : string = string to be duplicated
561 * 2 : n = number of bytes to duplicate
563 * Returns : pointer to copy, or NULL if failiure
565 *********************************************************************/
566 char *bindup(const char *string, int n)
570 if (NULL == (dup = (char *)malloc(n)))
576 memcpy(dup, string, n);
584 /*********************************************************************
586 * Function : make_path
588 * Description : Takes a directory name and a file name, returns
589 * the complete path. Handles windows/unix differences.
590 * If the file name is already an absolute path, or if
591 * the directory name is NULL or empty, it returns
595 * 1 : dir: Name of directory or NULL for none.
596 * 2 : file: Name of file. Should not be NULL or empty.
598 * Returns : "dir/file" (Or on windows, "dir\file").
599 * It allocates the string on the heap. Caller frees.
600 * Returns NULL in error (i.e. NULL file or out of
603 *********************************************************************/
604 char * make_path(const char * dir, const char * file)
611 strncpy(path,dir,512);
616 if(AddPart(path,file,512))
622 #else /* ndef AMIGA */
624 if ((file == NULL) || (*file == '\0'))
626 return NULL; /* Error */
629 if ((dir == NULL) || (*dir == '\0') /* No directory specified */
631 || (*file == '\\') || (file[1] == ':') /* Absolute path (DOS) */
632 #else /* ifndef _WIN32 */
633 || (*file == '/') /* Absolute path (U*ix) */
634 #endif /* ifndef _WIN32 */
641 char * path = malloc(strlen(dir) + strlen(file) + 2);
645 #else /* ifndef _WIN32 */
646 if(path[strlen(path)-1] != '/') strcat(path, "/");
647 #endif /* ifndef _WIN32 */
652 #endif /* ndef AMIGA */