1 const char miscutil_rcs[] = "$Id: miscutil.c,v 1.16 2001/09/10 10:56:59 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 1.16 2001/09/10 10:56:59 oes
40 * Silenced compiler warnings
42 * Revision 1.15 2001/07/13 14:02:24 oes
43 * Removed vim-settings
45 * Revision 1.14 2001/06/29 21:45:41 oes
46 * Indentation, CRLF->LF, Tab-> Space
48 * Revision 1.13 2001/06/29 13:32:14 oes
49 * Removed logentry from cancelled commit
51 * Revision 1.12 2001/06/09 10:55:28 jongfoster
52 * Changing BUFSIZ ==> BUFFER_SIZE
54 * Revision 1.11 2001/06/07 23:09:19 jongfoster
55 * Cosmetic indentation changes.
57 * Revision 1.10 2001/06/07 14:51:38 joergs
58 * make_path() no longer adds '/' if the dir already ends in '/'.
60 * Revision 1.9 2001/06/07 14:43:17 swa
61 * slight mistake in make_path, unix path style is /.
63 * Revision 1.8 2001/06/05 22:32:01 jongfoster
64 * New function make_path() to splice directory and file names together.
66 * Revision 1.7 2001/06/03 19:12:30 oes
69 * Revision 1.6 2001/06/01 18:14:49 jongfoster
70 * Changing the calls to strerr() to check HAVE_STRERR (which is defined
71 * in config.h if appropriate) rather than the NO_STRERR macro.
73 * Revision 1.5 2001/06/01 10:31:51 oes
74 * Added character class matching to trivimatch; renamed to simplematch
76 * Revision 1.4 2001/05/31 17:32:31 oes
78 * - Enhanced domain part globbing with infix and prefix asterisk
79 * matching and optional unanchored operation
81 * Revision 1.3 2001/05/29 23:10:09 oes
84 * - Introduced chomp()
85 * - Moved strsav() from showargs to miscutil
87 * Revision 1.2 2001/05/29 09:50:24 jongfoster
88 * Unified blocklist/imagelist/permissionslist.
89 * File format is still under discussion, but the internal changes
92 * Also modified interceptor behaviour:
93 * - We now intercept all URLs beginning with one of the following
94 * prefixes (and *only* these prefixes):
96 * * http://ijbswa.sf.net/config/
97 * * http://ijbswa.sourceforge.net/config/
98 * - New interceptors "home page" - go to http://i.j.b/ to see it.
99 * - Internal changes so that intercepted and fast redirect pages
100 * are not replaced with an image.
101 * - Interceptors now have the option to send a binary page direct
102 * to the client. (i.e. ijb-send-banner uses this)
103 * - Implemented show-url-info interceptor. (Which is why I needed
104 * the above interceptors changes - a typical URL is
105 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
106 * The previous mechanism would not have intercepted that, and
107 * if it had been intercepted then it then it would have replaced
110 * Revision 1.1.1.1 2001/05/15 13:59:00 oes
111 * Initial import of version 2.9.3 source tree
114 *********************************************************************/
126 * FIXME: Only need project.h for BUFFER_SIZE. It would be nice
127 * to remove this dependency.
130 #include "miscutil.h"
133 const char miscutil_h_rcs[] = MISCUTIL_H_VERSION;
135 /* Fix a problem with Solaris. There should be no effect on other
137 * Solaris's isspace() is a macro which uses it's argument directly
138 * as an array index. Therefore we need to make sure that high-bit
139 * characters generate +ve values, and ideally we also want to make
140 * the argument match the declared parameter type of "int".
142 #define ijb_tolower(__X) tolower((int)(unsigned char)(__X))
143 #define ijb_isspace(__X) isspace((int)(unsigned char)(__X))
145 /*********************************************************************
149 * Description : Malloc some memory and set it to '\0'.
150 * The way calloc() ought to be -acjc
153 * 1 : size = Size of memory chunk to return.
155 * Returns : Pointer to newly malloc'd memory chunk.
157 *********************************************************************/
158 void *zalloc(int size)
162 if ((ret = (void *)malloc(size)) != NULL)
164 memset(ret, 0, size);
171 /*********************************************************************
173 * Function : hash_string
175 * Description : Take a string and compute a (hopefuly) unique numeric
176 * integer value. This has several uses, but being able
177 * to "switch" a string the one of my favorites.
180 * 1 : s : string to be hashed.
182 * Returns : an unsigned long variable with the hashed value.
184 *********************************************************************/
185 unsigned long hash_string( const char* s )
187 unsigned long h = 0ul;
200 /*********************************************************************
204 * Description : For some reason (which is beyond me), gcc and WIN32
205 * don't like strdup. When a "free" is executed on a
206 * strdup'd ptr, it can at times freez up! So I just
207 * replaced it and problem was solved.
210 * 1 : s = string to duplicate
212 * Returns : Pointer to newly malloc'ed copy of the string.
214 *********************************************************************/
215 char *strdup( const char *s )
217 char * result = (char *)malloc( strlen(s)+1 );
227 #endif /* def __MINGW32__ */
231 /*********************************************************************
233 * Function : safe_strerror
235 * Description : Variant of the library routine strerror() which will
236 * work on systems without the library routine, and
237 * which should never return NULL.
240 * 1 : err = the `errno' of the last operation.
242 * Returns : An "English" string of the last `errno'. Allocated
243 * with strdup(), so caller frees. May be NULL if the
244 * system is out of memory.
246 *********************************************************************/
247 char *safe_strerror(int err)
250 char buf[BUFFER_SIZE];
255 #endif /* HAVE_STRERROR */
259 sprintf(buf, "(errno = %d)", err);
268 /*********************************************************************
270 * Function : strcmpic
272 * Description : Case insensitive string comparison
275 * 1 : s1 = string 1 to compare
276 * 2 : s2 = string 2 to compare
278 * Returns : 0 if s1==s2, Negative if s1<s2, Positive if s1>s2
280 *********************************************************************/
281 int strcmpic(const char *s1, const char *s2)
285 if ( ( *s1 != *s2 ) && ( ijb_tolower(*s1) != ijb_tolower(*s2) ) )
291 return(ijb_tolower(*s1) - ijb_tolower(*s2));
296 /*********************************************************************
298 * Function : strncmpic
300 * Description : Case insensitive string comparison (upto n characters)
303 * 1 : s1 = string 1 to compare
304 * 2 : s2 = string 2 to compare
305 * 3 : n = maximum characters to compare
307 * Returns : 0 if s1==s2, Negative if s1<s2, Positive if s1>s2
309 *********************************************************************/
310 int strncmpic(const char *s1, const char *s2, size_t n)
312 if (n <= 0) return(0);
316 if ( ( *s1 != *s2 ) && ( ijb_tolower(*s1) != ijb_tolower(*s2) ) )
325 return(ijb_tolower(*s1) - ijb_tolower(*s2));
330 /*********************************************************************
334 * Description : In-situ-eliminate all leading and trailing whitespace
338 * 1 : s : string to be chomped.
340 * Returns : chomped string
342 *********************************************************************/
343 char *chomp(char *string)
348 * strip trailing whitespace
350 p = string + strlen(string);
351 while (p > string && ijb_isspace(*(p-1)))
358 * find end of leading whitespace
361 while (*q && ijb_isspace(*q))
367 * if there was any, move the rest forwards
381 /*********************************************************************
385 * Description : Reallocate "old" and append text to it. This makes
386 * it easier to append to malloc'd strings.
389 * 1 : old = Old text that is to be extended. Will be
390 * free()d by this routine.
391 * 2 : text_to_append = Text to be appended to old.
393 * Returns : Pointer to newly malloc'ed appended string.
394 * If there is no text to append, return old. Caller
397 *********************************************************************/
398 char *strsav(char *old, const char *text_to_append)
400 int old_len, new_len;
403 if (( text_to_append == NULL) || (*text_to_append == '\0'))
410 old_len = strlen(old);
417 new_len = old_len + strlen(text_to_append) + 1;
421 if ((p = realloc(old, new_len)) == NULL)
423 log_error(LOG_LEVEL_FATAL, "realloc(%d) bytes failed!", new_len);
424 /* Never get here - LOG_LEVEL_FATAL causes program exit */
429 if ((p = (char *)malloc(new_len)) == NULL)
431 log_error(LOG_LEVEL_FATAL, "malloc(%d) bytes failed!", new_len);
432 /* Never get here - LOG_LEVEL_FATAL causes program exit */
436 strcpy(p + old_len, text_to_append);
442 /*********************************************************************
444 * Function : simplematch
446 * Description : String matching, with a (greedy) '*' wildcard that
447 * stands for zero or more arbitrary characters and
448 * character classes in [], which take both enumerations
452 * 1 : pattern = pattern for matching
453 * 2 : text = text to be matched
455 * Returns : 0 if match, else nonzero
457 *********************************************************************/
458 int simplematch(char *pattern, char *text)
460 unsigned char *pat = (unsigned char *) pattern;
461 unsigned char *txt = (unsigned char *) text;
462 unsigned char *fallback = pat;
465 unsigned char lastchar = 'a';
467 unsigned char charmap[32];
473 /* EOF pattern but !EOF text? */
479 /* '*' in the pattern? */
483 /* The pattern ends afterwards? Speed up the return. */
489 /* Else, set wildcard mode and remember position after '*' */
494 /* Character range specification? */
497 memset(charmap, '\0', sizeof(charmap));
499 while (*++pat != ']')
505 else if (*pat == '-')
507 if ((*++pat == ']') || *pat == '\0')
511 for(i = lastchar; i <= *pat; i++)
513 charmap[i / 8] |= (1 << (i % 8));
518 charmap[*pat / 8] |= (1 << (*pat % 8));
522 } /* -END- if Character range specification */
525 /* Compare: Char match, or char range match*/
527 || ((*pat == ']') && (charmap[*txt / 8] & (1 << (*txt % 8)))) )
529 /* Sucess, go ahead */
534 /* In wildcard mode, just try again after failiure */
549 /* Cut off extra '*'s */
550 if(*pat == '*') pat++;
552 /* If this is the pattern's end, fine! */
558 /*********************************************************************
562 * Description : Duplicate the first n characters of a string that may
563 * contain '\0' characters.
566 * 1 : string = string to be duplicated
567 * 2 : n = number of bytes to duplicate
569 * Returns : pointer to copy, or NULL if failiure
571 *********************************************************************/
572 char *bindup(const char *string, int n)
576 if (NULL == (dup = (char *)malloc(n)))
582 memcpy(dup, string, n);
590 /*********************************************************************
592 * Function : make_path
594 * Description : Takes a directory name and a file name, returns
595 * the complete path. Handles windows/unix differences.
596 * If the file name is already an absolute path, or if
597 * the directory name is NULL or empty, it returns
601 * 1 : dir: Name of directory or NULL for none.
602 * 2 : file: Name of file. Should not be NULL or empty.
604 * Returns : "dir/file" (Or on windows, "dir\file").
605 * It allocates the string on the heap. Caller frees.
606 * Returns NULL in error (i.e. NULL file or out of
609 *********************************************************************/
610 char * make_path(const char * dir, const char * file)
617 strncpy(path,dir,512);
622 if(AddPart(path,file,512))
628 #else /* ndef AMIGA */
630 if ((file == NULL) || (*file == '\0'))
632 return NULL; /* Error */
635 if ((dir == NULL) || (*dir == '\0') /* No directory specified */
637 || (*file == '\\') || (file[1] == ':') /* Absolute path (DOS) */
638 #else /* ifndef _WIN32 */
639 || (*file == '/') /* Absolute path (U*ix) */
640 #endif /* ifndef _WIN32 */
647 char * path = malloc(strlen(dir) + strlen(file) + 2);
651 #else /* ifndef _WIN32 */
652 if(path[strlen(path)-1] != '/') strcat(path, "/");
653 #endif /* ifndef _WIN32 */
658 #endif /* ndef AMIGA */