X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=miscutil.c;h=010745fbaf9efb34c7696cb789a166e95aee9874;hp=ac363f4f108c65388e774a409eeb1fc85d5761a8;hb=bf6e7f055db3c9034d451d3c2c9de9a48369ba14;hpb=b28e9205bb0d4ac98d591c6e506219438799d56c diff --git a/miscutil.c b/miscutil.c index ac363f4f..010745fb 100644 --- a/miscutil.c +++ b/miscutil.c @@ -1,23 +1,29 @@ -/* vim:ts=3: */ -const char miscutil_rcs[] = "$Id: miscutil.c,v 1.13 2001/06/29 13:32:14 oes Exp $"; +const char miscutil_rcs[] = "$Id: miscutil.c,v 1.85 2017/06/08 13:11:08 fabiankeil Exp $"; /********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/miscutil.c,v $ * - * Purpose : zalloc, hash_string, safe_strerror, strcmpic, - * strncmpic, strsav, chomp, and MinGW32 strdup - * functions. - * These are each too small to deserve their own file - * but don't really fit in any other file. + * Purpose : zalloc, hash_string, strcmpic, strncmpic, and + * MinGW32 strdup functions. These are each too small + * to deserve their own file but don't really fit in + * any other file. * - * Copyright : Written by and Copyright (C) 2001 the SourceForge - * IJBSWA team. http://ijbswa.sourceforge.net + * Copyright : Written by and Copyright (C) 2001-2016 the + * Privoxy team. http://www.privoxy.org/ * * Based on the Internet Junkbuster originally written - * by and Copyright (C) 1997 Anonymous Coders and + * by and Copyright (C) 1997 Anonymous Coders and * Junkbusters Corporation. http://www.junkbusters.com * - * This program is free software; you can redistribute it + * The timegm replacement function was taken from GnuPG, + * Copyright (C) 2004 Free Software Foundation, Inc. + * + * The snprintf replacement function is written by + * Mark Martinec who also holds the copyright. It can be + * used under the terms of the GPL or the terms of the + * "Frontier Artistic License". + * + * This program is free software; you can redistribute it * and/or modify it under the terms of the GNU General * Public License as published by the Free Software * Foundation; either version 2 of the License, or (at @@ -35,224 +41,239 @@ const char miscutil_rcs[] = "$Id: miscutil.c,v 1.13 2001/06/29 13:32:14 oes Exp * or write to the Free Software Foundation, Inc., 59 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. * - * Revisions : - * $Log: miscutil.c,v $ - * Revision 1.13 2001/06/29 13:32:14 oes - * Removed logentry from cancelled commit - * - * Revision 1.12 2001/06/09 10:55:28 jongfoster - * Changing BUFSIZ ==> BUFFER_SIZE - * - * Revision 1.11 2001/06/07 23:09:19 jongfoster - * Cosmetic indentation changes. - * - * Revision 1.10 2001/06/07 14:51:38 joergs - * make_path() no longer adds '/' if the dir already ends in '/'. - * - * Revision 1.9 2001/06/07 14:43:17 swa - * slight mistake in make_path, unix path style is /. - * - * Revision 1.8 2001/06/05 22:32:01 jongfoster - * New function make_path() to splice directory and file names together. - * - * Revision 1.7 2001/06/03 19:12:30 oes - * introduced bindup() - * - * Revision 1.6 2001/06/01 18:14:49 jongfoster - * Changing the calls to strerr() to check HAVE_STRERR (which is defined - * in config.h if appropriate) rather than the NO_STRERR macro. - * - * Revision 1.5 2001/06/01 10:31:51 oes - * Added character class matching to trivimatch; renamed to simplematch - * - * Revision 1.4 2001/05/31 17:32:31 oes - * - * - Enhanced domain part globbing with infix and prefix asterisk - * matching and optional unanchored operation - * - * Revision 1.3 2001/05/29 23:10:09 oes - * - * - * - Introduced chomp() - * - Moved strsav() from showargs to miscutil - * - * Revision 1.2 2001/05/29 09:50:24 jongfoster - * Unified blocklist/imagelist/permissionslist. - * File format is still under discussion, but the internal changes - * are (mostly) done. - * - * Also modified interceptor behaviour: - * - We now intercept all URLs beginning with one of the following - * prefixes (and *only* these prefixes): - * * http://i.j.b/ - * * http://ijbswa.sf.net/config/ - * * http://ijbswa.sourceforge.net/config/ - * - New interceptors "home page" - go to http://i.j.b/ to see it. - * - Internal changes so that intercepted and fast redirect pages - * are not replaced with an image. - * - Interceptors now have the option to send a binary page direct - * to the client. (i.e. ijb-send-banner uses this) - * - Implemented show-url-info interceptor. (Which is why I needed - * the above interceptors changes - a typical URL is - * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif". - * The previous mechanism would not have intercepted that, and - * if it had been intercepted then it then it would have replaced - * it with an image.) - * - * Revision 1.1.1.1 2001/05/15 13:59:00 oes - * Initial import of version 2.9.3 source tree - * - * *********************************************************************/ - + #include "config.h" #include +#include #include +#if !defined(_WIN32) && !defined(__OS2__) +#include +#endif /* #if !defined(_WIN32) && !defined(__OS2__) */ #include -#include #include +#include + +#if !defined(HAVE_TIMEGM) && defined(HAVE_TZSET) && defined(HAVE_PUTENV) +#include +#endif /* !defined(HAVE_TIMEGM) && defined(HAVE_TZSET) && defined(HAVE_PUTENV) */ -/* - * FIXME: Only need project.h for BUFFER_SIZE. It would be nice - * to remove this dependency. - */ #include "project.h" #include "miscutil.h" #include "errlog.h" +#include "jcc.h" const char miscutil_h_rcs[] = MISCUTIL_H_VERSION; -/* Fix a problem with Solaris. There should be no effect on other - * platforms. - * Solaris's isspace() is a macro which uses it's argument directly - * as an array index. Therefore we need to make sure that high-bit - * characters generate +ve values, and ideally we also want to make - * the argument match the declared parameter type of "int". - */ -#define ijb_tolower(__X) tolower((int)(unsigned char)(__X)) -#define ijb_isspace(__X) isspace((int)(unsigned char)(__X)) - /********************************************************************* * * Function : zalloc * - * Description : Malloc some memory and set it to '\0'. - * The way calloc() ought to be -acjc + * Description : Returns allocated memory that is initialized + * with zeros. * * Parameters : * 1 : size = Size of memory chunk to return. * - * Returns : Pointer to newly malloc'd memory chunk. + * Returns : Pointer to newly alloc'd memory chunk. * *********************************************************************/ -void *zalloc(int size) +void *zalloc(size_t size) { void * ret; +#ifdef HAVE_CALLOC + ret = calloc(1, size); +#else +#warning calloc appears to be unavailable. Your platform will become unsupported in the future if ((ret = (void *)malloc(size)) != NULL) { memset(ret, 0, size); } +#endif return(ret); + } /********************************************************************* * - * Function : hash_string + * Function : zalloc_or_die * - * Description : Take a string and compute a (hopefuly) unique numeric - * integer value. This has several uses, but being able - * to "switch" a string the one of my favorites. + * Description : zalloc wrapper that either succeeds or causes + * program termination. + * + * Useful in situations were the string length is + * "small" and zalloc() failures couldn't be handled + * better anyway. In case of debug builds, failures + * trigger an assert(). * * Parameters : - * 1 : s : string to be hashed. + * 1 : size = Size of memory chunk to return. * - * Returns : an unsigned long variable with the hashed value. + * Returns : Pointer to newly malloc'd memory chunk. * *********************************************************************/ -unsigned long hash_string( const char* s ) +void *zalloc_or_die(size_t size) { - unsigned long h = 0ul; + void *buffer; - for ( ; *s; ++s ) + buffer = zalloc(size); + if (buffer == NULL) { - h = 5 * h + *s; + assert(buffer != NULL); + log_error(LOG_LEVEL_FATAL, "Out of memory in zalloc_or_die()."); + exit(1); } - return (h); + return(buffer); } - -#ifdef __MINGW32__ /********************************************************************* * - * Function : strdup + * Function : strdup_or_die + * + * Description : strdup wrapper that either succeeds or causes + * program termination. * - * Description : For some reason (which is beyond me), gcc and WIN32 - * don't like strdup. When a "free" is executed on a - * strdup'd ptr, it can at times freez up! So I just - * replaced it and problem was solved. + * Useful in situations were the string length is + * "small" and strdup() failures couldn't be handled + * better anyway. In case of debug builds, failures + * trigger an assert(). * * Parameters : - * 1 : s = string to duplicate + * 1 : str = String to duplicate * - * Returns : Pointer to newly malloc'ed copy of the string. + * Returns : Pointer to newly strdup'd copy of the string. * *********************************************************************/ -char *strdup( const char *s ) +char *strdup_or_die(const char *str) { - char * result = (char *)malloc( strlen(s)+1 ); + char *new_str; - if (result != NULL) + new_str = strdup(str); + + if (new_str == NULL) { - strcpy( result, s ); + assert(new_str != NULL); + log_error(LOG_LEVEL_FATAL, "Out of memory in strdup_or_die()."); + exit(1); } - return( result ); + return(new_str); + } -#endif /* def __MINGW32__ */ +/********************************************************************* + * + * Function : malloc_or_die + * + * Description : malloc wrapper that either succeeds or causes + * program termination. + * + * Useful in situations were the buffer size is "small" + * and malloc() failures couldn't be handled better + * anyway. In case of debug builds, failures trigger + * an assert(). + * + * Parameters : + * 1 : buffer_size = Size of the space to allocate + * + * Returns : Pointer to newly malloc'd memory + * + *********************************************************************/ +void *malloc_or_die(size_t buffer_size) +{ + char *new_buf; + + if (buffer_size == 0) + { + log_error(LOG_LEVEL_ERROR, + "malloc_or_die() called with buffer size 0"); + assert(buffer_size != 0); + buffer_size = 4096; + } + + new_buf = malloc(buffer_size); + + if (new_buf == NULL) + { + assert(new_buf != NULL); + log_error(LOG_LEVEL_FATAL, "Out of memory in malloc_or_die()."); + exit(1); + } + + return(new_buf); + +} +#if defined(unix) /********************************************************************* * - * Function : safe_strerror + * Function : write_pid_file * - * Description : Variant of the library routine strerror() which will - * work on systems without the library routine, and - * which should never return NULL. + * Description : Writes a pid file with the pid of the main process. + * Exits if the file can't be opened * - * Parameters : - * 1 : err = the `errno' of the last operation. + * Parameters : None * - * Returns : An "English" string of the last `errno'. Allocated - * with strdup(), so caller frees. May be NULL if the - * system is out of memory. + * Returns : N/A * *********************************************************************/ -char *safe_strerror(int err) +void write_pid_file(void) { - char *s = NULL; - char buf[BUFFER_SIZE]; + FILE *fp; + /* + * If no --pidfile option was given, + * we can live without one. + */ + if (pidfile == NULL) return; + + if ((fp = fopen(pidfile, "w")) == NULL) + { + log_error(LOG_LEVEL_FATAL, "can't open pidfile '%s': %E", pidfile); + } + else + { + fprintf(fp, "%u\n", (unsigned int) getpid()); + fclose (fp); + } + return; -#ifdef HAVE_STRERROR - s = strerror(err); -#endif /* HAVE_STRERROR */ +} +#endif /* def unix */ + + +/********************************************************************* + * + * Function : hash_string + * + * Description : Take a string and compute a (hopefuly) unique numeric + * integer value. This is useful to "switch" a string. + * + * Parameters : + * 1 : s : string to be hashed. + * + * Returns : The string's hash + * + *********************************************************************/ +unsigned int hash_string(const char* s) +{ + unsigned int h = 0; - if (s == NULL) + for (; *s; ++s) { - sprintf(buf, "(errno = %d)", err); - s = buf; + h = 5 * h + (unsigned int)*s; } - return(strdup(s)); + return (h); } @@ -272,15 +293,18 @@ char *safe_strerror(int err) *********************************************************************/ int strcmpic(const char *s1, const char *s2) { + if (!s1) s1 = ""; + if (!s2) s2 = ""; + while (*s1 && *s2) { - if ( ( *s1 != *s2 ) && ( ijb_tolower(*s1) != ijb_tolower(*s2) ) ) + if ((*s1 != *s2) && (privoxy_tolower(*s1) != privoxy_tolower(*s2))) { break; } s1++, s2++; } - return(ijb_tolower(*s1) - ijb_tolower(*s2)); + return(privoxy_tolower(*s1) - privoxy_tolower(*s2)); } @@ -289,7 +313,7 @@ int strcmpic(const char *s1, const char *s2) * * Function : strncmpic * - * Description : Case insensitive string comparison (upto n characters) + * Description : Case insensitive string comparison (up to n characters) * * Parameters : * 1 : s1 = string 1 to compare @@ -301,20 +325,22 @@ int strcmpic(const char *s1, const char *s2) *********************************************************************/ int strncmpic(const char *s1, const char *s2, size_t n) { - if (n <= 0) return(0); + if (n <= (size_t)0) return(0); + if (!s1) s1 = ""; + if (!s2) s2 = ""; while (*s1 && *s2) { - if ( ( *s1 != *s2 ) && ( ijb_tolower(*s1) != ijb_tolower(*s2) ) ) + if ((*s1 != *s2) && (privoxy_tolower(*s1) != privoxy_tolower(*s2))) { break; } - if (--n <= 0) break; + if (--n <= (size_t)0) break; s1++, s2++; } - return(ijb_tolower(*s1) - ijb_tolower(*s2)); + return(privoxy_tolower(*s1) - privoxy_tolower(*s2)); } @@ -336,21 +362,21 @@ char *chomp(char *string) { char *p, *q, *r; - /* + /* * strip trailing whitespace */ p = string + strlen(string); - while (p > string && ijb_isspace(*(p-1))) + while (p > string && privoxy_isspace(*(p-1))) { p--; } *p = '\0'; - /* - * find end of leading whitespace + /* + * find end of leading whitespace */ q = r = string; - while (*q && ijb_isspace(*q)) + while (*q && privoxy_isspace(*q)) { q++; } @@ -370,180 +396,205 @@ char *chomp(char *string) } + /********************************************************************* * - * Function : strsav + * Function : string_append * - * Description : Reallocate "old" and append text to it. This makes - * it easier to append to malloc'd strings. + * Description : Reallocate target_string and append text to it. + * This makes it easier to append to malloc'd strings. + * This is similar to the (removed) strsav(), but + * running out of memory isn't catastrophic. + * + * Programming style: + * + * The following style provides sufficient error + * checking for this routine, with minimal clutter + * in the source code. It is recommended if you + * have many calls to this function: + * + * char * s = strdup(...); // don't check for error + * string_append(&s, ...); // don't check for error + * string_append(&s, ...); // don't check for error + * string_append(&s, ...); // don't check for error + * if (NULL == s) { ... handle error ... } + * + * OR, equivalently: + * + * char * s = strdup(...); // don't check for error + * string_append(&s, ...); // don't check for error + * string_append(&s, ...); // don't check for error + * if (string_append(&s, ...)) {... handle error ...} * * Parameters : - * 1 : old = Old text that is to be extended. Will be - * free()d by this routine. + * 1 : target_string = Pointer to old text that is to be + * extended. *target_string will be free()d by this + * routine. target_string must be non-NULL. + * If *target_string is NULL, this routine will + * do nothing and return with an error - this allows + * you to make many calls to this routine and only + * check for errors after the last one. * 2 : text_to_append = Text to be appended to old. + * Must not be NULL. * - * Returns : Pointer to newly malloc'ed appended string. - * If there is no text to append, return old. Caller - * must free(). + * Returns : JB_ERR_OK on success, and sets *target_string + * to newly malloc'ed appended string. Caller + * must free(*target_string). + * JB_ERR_MEMORY on out-of-memory. (And free()s + * *target_string and sets it to NULL). + * JB_ERR_MEMORY if *target_string is NULL. * *********************************************************************/ -char *strsav(char *old, const char *text_to_append) +jb_err string_append(char **target_string, const char *text_to_append) { - int old_len, new_len; - char *p; + size_t old_len; + char *new_string; + size_t new_size; - if (( text_to_append == NULL) || (*text_to_append == '\0')) - { - return(old); - } + assert(target_string); + assert(text_to_append); - if (NULL != old) + if (*target_string == NULL) { - old_len = strlen(old); + return JB_ERR_MEMORY; } - else + + if (*text_to_append == '\0') { - old_len = 0; + return JB_ERR_OK; } - new_len = old_len + strlen(text_to_append) + 1; + old_len = strlen(*target_string); - if (old) - { - if ((p = realloc(old, new_len)) == NULL) - { - log_error(LOG_LEVEL_FATAL, "realloc(%d) bytes failed!", new_len); - /* Never get here - LOG_LEVEL_FATAL causes program exit */ - } - } - else + new_size = strlen(text_to_append) + old_len + 1; + + if (NULL == (new_string = realloc(*target_string, new_size))) { - if ((p = (char *)malloc(new_len)) == NULL) - { - log_error(LOG_LEVEL_FATAL, "malloc(%d) bytes failed!", new_len); - /* Never get here - LOG_LEVEL_FATAL causes program exit */ - } + free(*target_string); + + *target_string = NULL; + return JB_ERR_MEMORY; } - strcpy(p + old_len, text_to_append); - return(p); + strlcpy(new_string + old_len, text_to_append, new_size - old_len); + *target_string = new_string; + return JB_ERR_OK; } /********************************************************************* * - * Function : simplematch + * Function : string_join + * + * Description : Join two strings together. Frees BOTH the original + * strings. If either or both input strings are NULL, + * fails as if it had run out of memory. + * + * For comparison, string_append requires that the + * second string is non-NULL, and doesn't free it. * - * Description : String matching, with a (greedy) '*' wildcard that - * stands for zero or more arbitrary characters and - * character classes in [], which take both enumerations - * and ranges. + * Rationale: Too often, we want to do + * string_append(s, html_encode(s2)). That assert()s + * if s2 is NULL or if html_encode() runs out of memory. + * It also leaks memory. Proper checking is cumbersome. + * The solution: string_join(s, html_encode(s2)) is safe, + * and will free the memory allocated by html_encode(). * * Parameters : - * 1 : pattern = pattern for matching - * 2 : text = text to be matched + * 1 : target_string = Pointer to old text that is to be + * extended. *target_string will be free()d by this + * routine. target_string must be non-NULL. + * 2 : text_to_append = Text to be appended to old. * - * Returns : 0 if match, else nonzero + * Returns : JB_ERR_OK on success, and sets *target_string + * to newly malloc'ed appended string. Caller + * must free(*target_string). + * JB_ERR_MEMORY on out-of-memory, or if + * *target_string or text_to_append is NULL. (In + * this case, frees *target_string and text_to_append, + * sets *target_string to NULL). * *********************************************************************/ -int simplematch(char *pattern, char *text) +jb_err string_join(char **target_string, char *text_to_append) { - char *fallback; - char *pat = pattern; - char *txt = text; - int wildcard = 0; - - char lastchar = 'a'; - unsigned i; - unsigned char charmap[32]; - - - while (*txt) + jb_err err; + + assert(target_string); + + if (text_to_append == NULL) { + freez(*target_string); + return JB_ERR_MEMORY; + } - /* EOF pattern but !EOF text? */ - if (*pat == '\0') - { - return 1; - } + err = string_append(target_string, text_to_append); - /* '*' in the pattern? */ - if (*pat == '*') - { - - /* The pattern ends afterwards? Speed up the return. */ - if (*++pat == '\0') - { - return 0; - } - - /* Else, set wildcard mode and remember position after '*' */ - wildcard = 1; - fallback = pat; - } + freez(text_to_append); - /* Character range specification? */ - if (*pat == '[') - { - memset(charmap, '\0', sizeof(charmap)); + return err; +} - while (*++pat != ']') - { - if (!*pat) - { - return 1; - } - else if (*pat == '-') - { - if ((*++pat == ']') || *pat == '\0') - { - return(1); - } - for(i = lastchar; i <= *pat; i++) - { - charmap[i / 8] |= (1 << (i % 8)); - } - } - else - { - charmap[*pat / 8] |= (1 << (*pat % 8)); - lastchar = *pat; - } - } - } /* -END- if Character range specification */ +/********************************************************************* + * + * Function : string_toupper + * + * Description : Produce a copy of string with all convertible + * characters converted to uppercase. + * + * Parameters : + * 1 : string = string to convert + * + * Returns : Uppercase copy of string if possible, + * NULL on out-of-memory or if string was NULL. + * + *********************************************************************/ +char *string_toupper(const char *string) +{ + char *result, *p; + const char *q; - /* Compare: Char match, or char range match*/ - if ((*pat == *txt) - || ((*pat == ']') && (charmap[*txt / 8] & (1 << (*txt % 8)))) ) - { - /* Sucess, go ahead */ - pat++; - } - else - { - /* In wildcard mode, just try again after failiure */ - if(wildcard) - { - pat = fallback; - } + if (!string || ((result = (char *) zalloc(strlen(string) + 1)) == NULL)) + { + return NULL; + } - /* Else, bad luck */ - else - { - return 1; - } - } - txt++; + q = string; + p = result; + + while (*q != '\0') + { + *p++ = (char)toupper((int) *q++); } - /* Cut off extra '*'s */ - if(*pat == '*') pat++; + return result; + +} + - /* If this is the pattern's end, fine! */ - return(*pat); +/********************************************************************* + * + * Function : string_move + * + * Description : memmove wrapper to move the last part of a string + * towards the beginning, overwriting the part in + * the middle. strlcpy() can't be used here as the + * strings overlap. + * + * Parameters : + * 1 : dst = Destination to overwrite + * 2 : src = Source to move. + * + * Returns : N/A + * + *********************************************************************/ +void string_move(char *dst, char *src) +{ + assert(dst < src); + /* +1 to copy the terminating nul as well. */ + memmove(dst, src, strlen(src)+1); } @@ -556,25 +607,22 @@ int simplematch(char *pattern, char *text) * * Parameters : * 1 : string = string to be duplicated - * 2 : n = number of bytes to duplicate + * 2 : len = number of bytes to duplicate * * Returns : pointer to copy, or NULL if failiure * *********************************************************************/ -char *bindup(const char *string, int n) +char *bindup(const char *string, size_t len) { - char *dup; + char *duplicate; - if (NULL == (dup = (char *)malloc(n))) + duplicate = (char *)malloc(len); + if (NULL != duplicate) { - return NULL; - } - else - { - memcpy(dup, string, n); + memcpy(duplicate, string, len); } - return dup; + return duplicate; } @@ -583,11 +631,11 @@ char *bindup(const char *string, int n) * * Function : make_path * - * Description : Takes a directory name and a file name, returns + * Description : Takes a directory name and a file name, returns * the complete path. Handles windows/unix differences. * If the file name is already an absolute path, or if - * the directory name is NULL or empty, it returns - * the filename. + * the directory name is NULL or empty, it returns + * the filename. * * Parameters : * 1 : dir: Name of directory or NULL for none. @@ -596,7 +644,7 @@ char *bindup(const char *string, int n) * Returns : "dir/file" (Or on windows, "dir\file"). * It allocates the string on the heap. Caller frees. * Returns NULL in error (i.e. NULL file or out of - * memory) + * memory) * *********************************************************************/ char * make_path(const char * dir, const char * file) @@ -604,17 +652,35 @@ char * make_path(const char * dir, const char * file) #ifdef AMIGA char path[512]; - if(dir) + if (dir) { - strncpy(path,dir,512); + if (dir[0] == '.') + { + if (dir[1] == '/') + { + strncpy(path,dir+2,512); + } + else + { + strncpy(path,dir+1,512); + } + } + else + { + strncpy(path,dir,512); + } path[511]=0; - } else { + } + else + { path[0]=0; } - if(AddPart(path,file,512)) + if (AddPart(path,file,512)) { return strdup(path); - } else { + } + else + { return NULL; } #else /* ndef AMIGA */ @@ -625,25 +691,54 @@ char * make_path(const char * dir, const char * file) } if ((dir == NULL) || (*dir == '\0') /* No directory specified */ -#ifdef _WIN32 +#if defined(_WIN32) || defined(__OS2__) || (*file == '\\') || (file[1] == ':') /* Absolute path (DOS) */ -#else /* ifndef _WIN32 */ +#else /* ifndef _WIN32 || __OS2__ */ || (*file == '/') /* Absolute path (U*ix) */ -#endif /* ifndef _WIN32 */ +#endif /* ifndef _WIN32 || __OS2__ */ ) { return strdup(file); } else { - char * path = malloc(strlen(dir) + strlen(file) + 2); - strcpy(path, dir); -#ifdef _WIN32 - strcat(path, "\\"); -#else /* ifndef _WIN32 */ - if(path[strlen(path)-1] != '/') strcat(path, "/"); -#endif /* ifndef _WIN32 */ - strcat(path, file); + char * path; + size_t path_size = strlen(dir) + strlen(file) + 2; /* +2 for trailing (back)slash and \0 */ + +#if defined(unix) + if (*dir != '/' && basedir && *basedir) + { + /* + * Relative path, so start with the base directory. + */ + path_size += strlen(basedir) + 1; /* +1 for the slash */ + path = malloc(path_size); + if (!path) log_error(LOG_LEVEL_FATAL, "malloc failed!"); + strlcpy(path, basedir, path_size); + strlcat(path, "/", path_size); + strlcat(path, dir, path_size); + } + else +#endif /* defined unix */ + { + path = malloc(path_size); + if (!path) log_error(LOG_LEVEL_FATAL, "malloc failed!"); + strlcpy(path, dir, path_size); + } + + assert(NULL != path); +#if defined(_WIN32) || defined(__OS2__) + if (path[strlen(path)-1] != '\\') + { + strlcat(path, "\\", path_size); + } +#else /* ifndef _WIN32 || __OS2__ */ + if (path[strlen(path)-1] != '/') + { + strlcat(path, "/", path_size); + } +#endif /* ifndef _WIN32 || __OS2__ */ + strlcat(path, file, path_size); return path; } @@ -651,6 +746,958 @@ char * make_path(const char * dir, const char * file) } +/********************************************************************* + * + * Function : pick_from_range + * + * Description : Pick a positive number out of a given range. + * Should only be used if randomness would be nice, + * but isn't really necessary. + * + * Parameters : + * 1 : range: Highest possible number to pick. + * + * Returns : Picked number. + * + *********************************************************************/ +long int pick_from_range(long int range) +{ + long int number; +#ifdef _WIN32 + static unsigned long seed = 0; +#endif /* def _WIN32 */ + + assert(range != 0); + assert(range > 0); + + if (range <= 0) return 0; + +#ifdef HAVE_ARC4RANDOM + number = arc4random() % range + 1; +#elif defined(HAVE_RANDOM) + number = random() % range + 1; +#elif defined(MUTEX_LOCKS_AVAILABLE) + privoxy_mutex_lock(&rand_mutex); +#ifdef _WIN32 + if (!seed) + { + seed = (unsigned long)(GetCurrentThreadId()+GetTickCount()); + } + srand(seed); + seed = (unsigned long)((rand() << 16) + rand()); +#endif /* def _WIN32 */ + number = (unsigned long)((rand() << 16) + (rand())) % (unsigned long)(range + 1); + privoxy_mutex_unlock(&rand_mutex); +#else + /* + * XXX: Which platforms reach this and are there + * better options than just using rand() and hoping + * that it's safe? + */ + log_error(LOG_LEVEL_INFO, "No thread-safe PRNG available? Header time randomization " + "might cause crashes, predictable results or even combine these fine options."); + number = rand() % (long int)(range + 1); + +#endif /* (def HAVE_ARC4RANDOM) */ + + return number; +} + + +#ifdef USE_PRIVOXY_STRLCPY +/********************************************************************* + * + * Function : privoxy_strlcpy + * + * Description : strlcpy(3) look-alike for those without decent libc. + * + * Parameters : + * 1 : destination: buffer to copy into. + * 2 : source: String to copy. + * 3 : size: Size of destination buffer. + * + * Returns : The length of the string that privoxy_strlcpy() tried to create. + * + *********************************************************************/ +size_t privoxy_strlcpy(char *destination, const char *source, const size_t size) +{ + if (0 < size) + { + snprintf(destination, size, "%s", source); + /* + * Platforms that lack strlcpy() also tend to have + * a broken snprintf implementation that doesn't + * guarantee nul termination. + * + * XXX: the configure script should detect and reject those. + */ + destination[size-1] = '\0'; + } + return strlen(source); +} +#endif /* def USE_PRIVOXY_STRLCPY */ + + +#ifndef HAVE_STRLCAT +/********************************************************************* + * + * Function : privoxy_strlcat + * + * Description : strlcat(3) look-alike for those without decent libc. + * + * Parameters : + * 1 : destination: C string. + * 2 : source: String to copy. + * 3 : size: Size of destination buffer. + * + * Returns : The length of the string that privoxy_strlcat() tried to create. + * + *********************************************************************/ +size_t privoxy_strlcat(char *destination, const char *source, const size_t size) +{ + const size_t old_length = strlen(destination); + return old_length + strlcpy(destination + old_length, source, size - old_length); +} +#endif /* ndef HAVE_STRLCAT */ + + +#if !defined(HAVE_TIMEGM) && defined(HAVE_TZSET) && defined(HAVE_PUTENV) +/********************************************************************* + * + * Function : timegm + * + * Description : libc replacement function for the inverse of gmtime(). + * Copyright (C) 2004 Free Software Foundation, Inc. + * + * Code originally copied from GnuPG, modifications done + * for Privoxy: style changed, #ifdefs for _WIN32 added + * to have it work on mingw32. + * + * XXX: It's very unlikely to happen, but if the malloc() + * call fails the time zone will be permanently set to UTC. + * + * Parameters : + * 1 : tm: Broken-down time struct. + * + * Returns : tm converted into time_t seconds. + * + *********************************************************************/ +time_t timegm(struct tm *tm) +{ + time_t answer; + char *zone; + + zone = getenv("TZ"); + putenv("TZ=UTC"); + tzset(); + answer = mktime(tm); + if (zone) + { + char *old_zone; + + old_zone = malloc(3 + strlen(zone) + 1); + if (old_zone) + { + strcpy(old_zone, "TZ="); + strcat(old_zone, zone); + putenv(old_zone); +#ifdef _WIN32 + /* http://man7.org/linux/man-pages/man3/putenv.3.html + * int putenv(char *string); + * The string pointed to by string becomes part of the environment, so altering the + * string changes the environment. + * In other words, the memory pointed to by *string is used until + * a) another call to putenv() with the same e-var name + * b) the program exits + * + * Windows e-vars don't work that way, so let's not leak memory. + */ + free(old_zone); +#endif /* def _WIN32 */ + } + } + else + { +#ifdef HAVE_UNSETENV + unsetenv("TZ"); +#elif defined(_WIN32) + putenv("TZ="); +#else + putenv("TZ"); +#endif + } + tzset(); + + return answer; +} +#endif /* !defined(HAVE_TIMEGM) && defined(HAVE_TZSET) && defined(HAVE_PUTENV) */ + + +#ifndef HAVE_SNPRINTF +/* + * What follows is a portable snprintf routine, written by Mark Martinec. + * See: http://www.ijs.si/software/snprintf/ + + snprintf.c + - a portable implementation of snprintf, + including vsnprintf.c, asnprintf, vasnprintf, asprintf, vasprintf + + snprintf is a routine to convert numeric and string arguments to + formatted strings. It is similar to sprintf(3) provided in a system's + C library, yet it requires an additional argument - the buffer size - + and it guarantees never to store anything beyond the given buffer, + regardless of the format or arguments to be formatted. Some newer + operating systems do provide snprintf in their C library, but many do + not or do provide an inadequate (slow or idiosyncratic) version, which + calls for a portable implementation of this routine. + +Author + + Mark Martinec , April 1999, June 2000 + Copyright © 1999, Mark Martinec + + */ + +#define PORTABLE_SNPRINTF_VERSION_MAJOR 2 +#define PORTABLE_SNPRINTF_VERSION_MINOR 2 + +#if defined(NEED_ASPRINTF) || defined(NEED_ASNPRINTF) || defined(NEED_VASPRINTF) || defined(NEED_VASNPRINTF) +# if defined(NEED_SNPRINTF_ONLY) +# undef NEED_SNPRINTF_ONLY +# endif +# if !defined(PREFER_PORTABLE_SNPRINTF) +# define PREFER_PORTABLE_SNPRINTF +# endif +#endif + +#if defined(SOLARIS_BUG_COMPATIBLE) && !defined(SOLARIS_COMPATIBLE) +#define SOLARIS_COMPATIBLE +#endif + +#if defined(HPUX_BUG_COMPATIBLE) && !defined(HPUX_COMPATIBLE) +#define HPUX_COMPATIBLE +#endif + +#if defined(DIGITAL_UNIX_BUG_COMPATIBLE) && !defined(DIGITAL_UNIX_COMPATIBLE) +#define DIGITAL_UNIX_COMPATIBLE +#endif + +#if defined(PERL_BUG_COMPATIBLE) && !defined(PERL_COMPATIBLE) +#define PERL_COMPATIBLE +#endif + +#if defined(LINUX_BUG_COMPATIBLE) && !defined(LINUX_COMPATIBLE) +#define LINUX_COMPATIBLE +#endif + +#include +#include +#include +#include +#include +#include +#include + +#ifdef isdigit +#undef isdigit +#endif +#define isdigit(c) ((c) >= '0' && (c) <= '9') + +/* For copying strings longer or equal to 'breakeven_point' + * it is more efficient to call memcpy() than to do it inline. + * The value depends mostly on the processor architecture, + * but also on the compiler and its optimization capabilities. + * The value is not critical, some small value greater than zero + * will be just fine if you don't care to squeeze every drop + * of performance out of the code. + * + * Small values favor memcpy, large values favor inline code. + */ +#if defined(__alpha__) || defined(__alpha) +# define breakeven_point 2 /* AXP (DEC Alpha) - gcc or cc or egcs */ +#endif +#if defined(__i386__) || defined(__i386) +# define breakeven_point 12 /* Intel Pentium/Linux - gcc 2.96 */ +#endif +#if defined(__hppa) +# define breakeven_point 10 /* HP-PA - gcc */ +#endif +#if defined(__sparc__) || defined(__sparc) +# define breakeven_point 33 /* Sun Sparc 5 - gcc 2.8.1 */ +#endif + +/* some other values of possible interest: */ +/* #define breakeven_point 8 */ /* VAX 4000 - vaxc */ +/* #define breakeven_point 19 */ /* VAX 4000 - gcc 2.7.0 */ + +#ifndef breakeven_point +# define breakeven_point 6 /* some reasonable one-size-fits-all value */ +#endif + +#define fast_memcpy(d,s,n) \ + { register size_t nn = (size_t)(n); \ + if (nn >= breakeven_point) memcpy((d), (s), nn); \ + else if (nn > 0) { /* proc call overhead is worth only for large strings*/\ + register char *dd; register const char *ss; \ + for (ss=(s), dd=(d); nn>0; nn--) *dd++ = *ss++; } } + +#define fast_memset(d,c,n) \ + { register size_t nn = (size_t)(n); \ + if (nn >= breakeven_point) memset((d), (int)(c), nn); \ + else if (nn > 0) { /* proc call overhead is worth only for large strings*/\ + register char *dd; register const int cc=(int)(c); \ + for (dd=(d); nn>0; nn--) *dd++ = cc; } } + +/* prototypes */ + +#if defined(NEED_ASPRINTF) +int asprintf (char **ptr, const char *fmt, /*args*/ ...); +#endif +#if defined(NEED_VASPRINTF) +int vasprintf (char **ptr, const char *fmt, va_list ap); +#endif +#if defined(NEED_ASNPRINTF) +int asnprintf (char **ptr, size_t str_m, const char *fmt, /*args*/ ...); +#endif +#if defined(NEED_VASNPRINTF) +int vasnprintf (char **ptr, size_t str_m, const char *fmt, va_list ap); +#endif + +#if defined(HAVE_SNPRINTF) +/* declare our portable snprintf routine under name portable_snprintf */ +/* declare our portable vsnprintf routine under name portable_vsnprintf */ +#else +/* declare our portable routines under names snprintf and vsnprintf */ +#define portable_snprintf snprintf +#if !defined(NEED_SNPRINTF_ONLY) +#define portable_vsnprintf vsnprintf +#endif +#endif + +#if !defined(HAVE_SNPRINTF) || defined(PREFER_PORTABLE_SNPRINTF) +int portable_snprintf(char *str, size_t str_m, const char *fmt, /*args*/ ...); +#if !defined(NEED_SNPRINTF_ONLY) +int portable_vsnprintf(char *str, size_t str_m, const char *fmt, va_list ap); +#endif +#endif + +/* declarations */ + +static char credits[] = "\n\ +@(#)snprintf.c, v2.2: Mark Martinec, \n\ +@(#)snprintf.c, v2.2: Copyright 1999, Mark Martinec. Frontier Artistic License applies.\n\ +@(#)snprintf.c, v2.2: http://www.ijs.si/software/snprintf/\n"; + +#if defined(NEED_ASPRINTF) +int asprintf(char **ptr, const char *fmt, /*args*/ ...) { + va_list ap; + size_t str_m; + int str_l; + + *ptr = NULL; + va_start(ap, fmt); /* measure the required size */ + str_l = portable_vsnprintf(NULL, (size_t)0, fmt, ap); + va_end(ap); + assert(str_l >= 0); /* possible integer overflow if str_m > INT_MAX */ + *ptr = (char *) malloc(str_m = (size_t)str_l + 1); + if (*ptr == NULL) { errno = ENOMEM; str_l = -1; } + else { + int str_l2; + va_start(ap, fmt); + str_l2 = portable_vsnprintf(*ptr, str_m, fmt, ap); + va_end(ap); + assert(str_l2 == str_l); + } + return str_l; +} +#endif + +#if defined(NEED_VASPRINTF) +int vasprintf(char **ptr, const char *fmt, va_list ap) { + size_t str_m; + int str_l; + + *ptr = NULL; + { va_list ap2; + va_copy(ap2, ap); /* don't consume the original ap, we'll need it again */ + str_l = portable_vsnprintf(NULL, (size_t)0, fmt, ap2);/*get required size*/ + va_end(ap2); + } + assert(str_l >= 0); /* possible integer overflow if str_m > INT_MAX */ + *ptr = (char *) malloc(str_m = (size_t)str_l + 1); + if (*ptr == NULL) { errno = ENOMEM; str_l = -1; } + else { + int str_l2 = portable_vsnprintf(*ptr, str_m, fmt, ap); + assert(str_l2 == str_l); + } + return str_l; +} +#endif + +#if defined(NEED_ASNPRINTF) +int asnprintf (char **ptr, size_t str_m, const char *fmt, /*args*/ ...) { + va_list ap; + int str_l; + + *ptr = NULL; + va_start(ap, fmt); /* measure the required size */ + str_l = portable_vsnprintf(NULL, (size_t)0, fmt, ap); + va_end(ap); + assert(str_l >= 0); /* possible integer overflow if str_m > INT_MAX */ + if ((size_t)str_l + 1 < str_m) str_m = (size_t)str_l + 1; /* truncate */ + /* if str_m is 0, no buffer is allocated, just set *ptr to NULL */ + if (str_m == 0) { /* not interested in resulting string, just return size */ + } else { + *ptr = (char *) malloc(str_m); + if (*ptr == NULL) { errno = ENOMEM; str_l = -1; } + else { + int str_l2; + va_start(ap, fmt); + str_l2 = portable_vsnprintf(*ptr, str_m, fmt, ap); + va_end(ap); + assert(str_l2 == str_l); + } + } + return str_l; +} +#endif + +#if defined(NEED_VASNPRINTF) +int vasnprintf (char **ptr, size_t str_m, const char *fmt, va_list ap) { + int str_l; + + *ptr = NULL; + { va_list ap2; + va_copy(ap2, ap); /* don't consume the original ap, we'll need it again */ + str_l = portable_vsnprintf(NULL, (size_t)0, fmt, ap2);/*get required size*/ + va_end(ap2); + } + assert(str_l >= 0); /* possible integer overflow if str_m > INT_MAX */ + if ((size_t)str_l + 1 < str_m) str_m = (size_t)str_l + 1; /* truncate */ + /* if str_m is 0, no buffer is allocated, just set *ptr to NULL */ + if (str_m == 0) { /* not interested in resulting string, just return size */ + } else { + *ptr = (char *) malloc(str_m); + if (*ptr == NULL) { errno = ENOMEM; str_l = -1; } + else { + int str_l2 = portable_vsnprintf(*ptr, str_m, fmt, ap); + assert(str_l2 == str_l); + } + } + return str_l; +} +#endif + +/* + * If the system does have snprintf and the portable routine is not + * specifically required, this module produces no code for snprintf/vsnprintf. + */ +#if !defined(HAVE_SNPRINTF) || defined(PREFER_PORTABLE_SNPRINTF) + +#if !defined(NEED_SNPRINTF_ONLY) +int portable_snprintf(char *str, size_t str_m, const char *fmt, /*args*/ ...) { + va_list ap; + int str_l; + + va_start(ap, fmt); + str_l = portable_vsnprintf(str, str_m, fmt, ap); + va_end(ap); + return str_l; +} +#endif + +#if defined(NEED_SNPRINTF_ONLY) +int portable_snprintf(char *str, size_t str_m, const char *fmt, /*args*/ ...) { +#else +int portable_vsnprintf(char *str, size_t str_m, const char *fmt, va_list ap) { +#endif + +#if defined(NEED_SNPRINTF_ONLY) + va_list ap; +#endif + size_t str_l = 0; + const char *p = fmt; + +/* In contrast with POSIX, the ISO C99 now says + * that str can be NULL and str_m can be 0. + * This is more useful than the old: if (str_m < 1) return -1; */ + +#if defined(NEED_SNPRINTF_ONLY) + va_start(ap, fmt); +#endif + if (!p) p = ""; + while (*p) { + if (*p != '%') { + /* if (str_l < str_m) str[str_l++] = *p++; -- this would be sufficient */ + /* but the following code achieves better performance for cases + * where format string is long and contains few conversions */ + const char *q = strchr(p+1,'%'); + size_t n = !q ? strlen(p) : (q-p); + if (str_l < str_m) { + size_t avail = str_m-str_l; + fast_memcpy(str+str_l, p, (n>avail?avail:n)); + } + p += n; str_l += n; + } else { + const char *starting_p; + size_t min_field_width = 0, precision = 0; + int zero_padding = 0, precision_specified = 0, justify_left = 0; + int alternate_form = 0, force_sign = 0; + int space_for_positive = 1; /* If both the ' ' and '+' flags appear, + the ' ' flag should be ignored. */ + char length_modifier = '\0'; /* allowed values: \0, h, l, L */ + char tmp[32];/* temporary buffer for simple numeric->string conversion */ + + const char *str_arg; /* string address in case of string argument */ + size_t str_arg_l; /* natural field width of arg without padding + and sign */ + unsigned char uchar_arg; + /* unsigned char argument value - only defined for c conversion. + N.B. standard explicitly states the char argument for + the c conversion is unsigned */ + + size_t number_of_zeros_to_pad = 0; + /* number of zeros to be inserted for numeric conversions + as required by the precision or minimal field width */ + + size_t zero_padding_insertion_ind = 0; + /* index into tmp where zero padding is to be inserted */ + + char fmt_spec = '\0'; + /* current conversion specifier character */ + + str_arg = credits;/* just to make compiler happy (defined but not used)*/ + str_arg = NULL; + starting_p = p; p++; /* skip '%' */ + /* parse flags */ + while (*p == '0' || *p == '-' || *p == '+' || + *p == ' ' || *p == '#' || *p == '\'') { + switch (*p) { + case '0': zero_padding = 1; break; + case '-': justify_left = 1; break; + case '+': force_sign = 1; space_for_positive = 0; break; + case ' ': force_sign = 1; + /* If both the ' ' and '+' flags appear, the ' ' flag should be ignored */ +#ifdef PERL_COMPATIBLE + /* ... but in Perl the last of ' ' and '+' applies */ + space_for_positive = 1; +#endif + break; + case '#': alternate_form = 1; break; + case '\'': break; + } + p++; + } + /* If the '0' and '-' flags both appear, the '0' flag should be ignored. */ + + /* parse field width */ + if (*p == '*') { + int j; + p++; j = va_arg(ap, int); + if (j >= 0) min_field_width = j; + else { min_field_width = -j; justify_left = 1; } + } else if (isdigit((int)(*p))) { + /* size_t could be wider than unsigned int; + make sure we treat argument like common implementations do */ + unsigned int uj = *p++ - '0'; + while (isdigit((int)(*p))) uj = 10*uj + (unsigned int)(*p++ - '0'); + min_field_width = uj; + } + /* parse precision */ + if (*p == '.') { + p++; precision_specified = 1; + if (*p == '*') { + int j = va_arg(ap, int); + p++; + if (j >= 0) precision = j; + else { + precision_specified = 0; precision = 0; + /* NOTE: + * Solaris 2.6 man page claims that in this case the precision + * should be set to 0. Digital Unix 4.0, HPUX 10 and BSD man page + * claim that this case should be treated as unspecified precision, + * which is what we do here. + */ + } + } else if (isdigit((int)(*p))) { + /* size_t could be wider than unsigned int; + make sure we treat argument like common implementations do */ + unsigned int uj = *p++ - '0'; + while (isdigit((int)(*p))) uj = 10*uj + (unsigned int)(*p++ - '0'); + precision = uj; + } + } + /* parse 'h', 'l' and 'll' length modifiers */ + if (*p == 'h' || *p == 'l') { + length_modifier = *p; p++; + if (length_modifier == 'l' && *p == 'l') { /* double l = long long */ +#ifdef SNPRINTF_LONGLONG_SUPPORT + length_modifier = '2'; /* double l encoded as '2' */ +#else + length_modifier = 'l'; /* treat it as a single 'l' */ +#endif + p++; + } + } + fmt_spec = *p; + /* common synonyms: */ + switch (fmt_spec) { + case 'i': fmt_spec = 'd'; break; + case 'D': fmt_spec = 'd'; length_modifier = 'l'; break; + case 'U': fmt_spec = 'u'; length_modifier = 'l'; break; + case 'O': fmt_spec = 'o'; length_modifier = 'l'; break; + default: break; + } + /* get parameter value, do initial processing */ + switch (fmt_spec) { + case '%': /* % behaves similar to 's' regarding flags and field widths */ + case 'c': /* c behaves similar to 's' regarding flags and field widths */ + case 's': + length_modifier = '\0'; /* wint_t and wchar_t not supported */ + /* the result of zero padding flag with non-numeric conversion specifier*/ + /* is undefined. Solaris and HPUX 10 does zero padding in this case, */ + /* Digital Unix and Linux does not. */ +#if !defined(SOLARIS_COMPATIBLE) && !defined(HPUX_COMPATIBLE) + zero_padding = 0; /* turn zero padding off for string conversions */ +#endif + str_arg_l = 1; + switch (fmt_spec) { + case '%': + str_arg = p; break; + case 'c': { + int j = va_arg(ap, int); + uchar_arg = (unsigned char) j; /* standard demands unsigned char */ + str_arg = (const char *) &uchar_arg; + break; + } + case 's': + str_arg = va_arg(ap, const char *); + if (!str_arg) str_arg_l = 0; + /* make sure not to address string beyond the specified precision !!! */ + else if (!precision_specified) str_arg_l = strlen(str_arg); + /* truncate string if necessary as requested by precision */ + else if (precision == 0) str_arg_l = 0; + else { + /* memchr on HP does not like n > 2^31 !!! */ + const char *q = memchr(str_arg, '\0', + precision <= 0x7fffffff ? precision : 0x7fffffff); + str_arg_l = !q ? precision : (q-str_arg); + } + break; + default: break; + } + break; + case 'd': case 'u': case 'o': case 'x': case 'X': case 'p': { + /* NOTE: the u, o, x, X and p conversion specifiers imply + the value is unsigned; d implies a signed value */ + + int arg_sign = 0; + /* 0 if numeric argument is zero (or if pointer is NULL for 'p'), + +1 if greater than zero (or nonzero for unsigned arguments), + -1 if negative (unsigned argument is never negative) */ + + int int_arg = 0; unsigned int uint_arg = 0; + /* only defined for length modifier h, or for no length modifiers */ + + long int long_arg = 0; unsigned long int ulong_arg = 0; + /* only defined for length modifier l */ + + void *ptr_arg = NULL; + /* pointer argument value -only defined for p conversion */ + +#ifdef SNPRINTF_LONGLONG_SUPPORT + long long int long_long_arg = 0; + unsigned long long int ulong_long_arg = 0; + /* only defined for length modifier ll */ +#endif + if (fmt_spec == 'p') { + /* HPUX 10: An l, h, ll or L before any other conversion character + * (other than d, i, u, o, x, or X) is ignored. + * Digital Unix: + * not specified, but seems to behave as HPUX does. + * Solaris: If an h, l, or L appears before any other conversion + * specifier (other than d, i, u, o, x, or X), the behavior + * is undefined. (Actually %hp converts only 16-bits of address + * and %llp treats address as 64-bit data which is incompatible + * with (void *) argument on a 32-bit system). + */ +#ifdef SOLARIS_COMPATIBLE +# ifdef SOLARIS_BUG_COMPATIBLE + /* keep length modifiers even if it represents 'll' */ +# else + if (length_modifier == '2') length_modifier = '\0'; +# endif +#else + length_modifier = '\0'; +#endif + ptr_arg = va_arg(ap, void *); + if (ptr_arg != NULL) arg_sign = 1; + } else if (fmt_spec == 'd') { /* signed */ + switch (length_modifier) { + case '\0': + case 'h': + /* It is non-portable to specify a second argument of char or short + * to va_arg, because arguments seen by the called function + * are not char or short. C converts char and short arguments + * to int before passing them to a function. + */ + int_arg = va_arg(ap, int); + if (int_arg > 0) arg_sign = 1; + else if (int_arg < 0) arg_sign = -1; + break; + case 'l': + long_arg = va_arg(ap, long int); + if (long_arg > 0) arg_sign = 1; + else if (long_arg < 0) arg_sign = -1; + break; +#ifdef SNPRINTF_LONGLONG_SUPPORT + case '2': + long_long_arg = va_arg(ap, long long int); + if (long_long_arg > 0) arg_sign = 1; + else if (long_long_arg < 0) arg_sign = -1; + break; +#endif + } + } else { /* unsigned */ + switch (length_modifier) { + case '\0': + case 'h': + uint_arg = va_arg(ap, unsigned int); + if (uint_arg) arg_sign = 1; + break; + case 'l': + ulong_arg = va_arg(ap, unsigned long int); + if (ulong_arg) arg_sign = 1; + break; +#ifdef SNPRINTF_LONGLONG_SUPPORT + case '2': + ulong_long_arg = va_arg(ap, unsigned long long int); + if (ulong_long_arg) arg_sign = 1; + break; +#endif + } + } + str_arg = tmp; str_arg_l = 0; + /* NOTE: + * For d, i, u, o, x, and X conversions, if precision is specified, + * the '0' flag should be ignored. This is so with Solaris 2.6, + * Digital UNIX 4.0, HPUX 10, Linux, FreeBSD, NetBSD; but not with Perl. + */ +#ifndef PERL_COMPATIBLE + if (precision_specified) zero_padding = 0; +#endif + if (fmt_spec == 'd') { + if (force_sign && arg_sign >= 0) + tmp[str_arg_l++] = space_for_positive ? ' ' : '+'; + /* leave negative numbers for sprintf to handle, + to avoid handling tricky cases like (short int)(-32768) */ +#ifdef LINUX_COMPATIBLE + } else if (fmt_spec == 'p' && force_sign && arg_sign > 0) { + tmp[str_arg_l++] = space_for_positive ? ' ' : '+'; +#endif + } else if (alternate_form) { + if (arg_sign != 0 && (fmt_spec == 'x' || fmt_spec == 'X') ) + { tmp[str_arg_l++] = '0'; tmp[str_arg_l++] = fmt_spec; } + /* alternate form should have no effect for p conversion, but ... */ +#ifdef HPUX_COMPATIBLE + else if (fmt_spec == 'p' + /* HPUX 10: for an alternate form of p conversion, + * a nonzero result is prefixed by 0x. */ +#ifndef HPUX_BUG_COMPATIBLE + /* Actually it uses 0x prefix even for a zero value. */ + && arg_sign != 0 +#endif + ) { tmp[str_arg_l++] = '0'; tmp[str_arg_l++] = 'x'; } +#endif + } + zero_padding_insertion_ind = str_arg_l; + if (!precision_specified) precision = 1; /* default precision is 1 */ + if (precision == 0 && arg_sign == 0 +#if defined(HPUX_BUG_COMPATIBLE) || defined(LINUX_COMPATIBLE) + && fmt_spec != 'p' + /* HPUX 10 man page claims: With conversion character p the result of + * converting a zero value with a precision of zero is a null string. + * Actually HP returns all zeroes, and Linux returns "(nil)". */ +#endif + ) { + /* converted to null string */ + /* When zero value is formatted with an explicit precision 0, + the resulting formatted string is empty (d, i, u, o, x, X, p). */ + } else { + char f[5]; int f_l = 0; + f[f_l++] = '%'; /* construct a simple format string for sprintf */ + if (!length_modifier) { } + else if (length_modifier=='2') { f[f_l++] = 'l'; f[f_l++] = 'l'; } + else f[f_l++] = length_modifier; + f[f_l++] = fmt_spec; f[f_l++] = '\0'; + if (fmt_spec == 'p') str_arg_l += sprintf(tmp+str_arg_l, f, ptr_arg); + else if (fmt_spec == 'd') { /* signed */ + switch (length_modifier) { + case '\0': + case 'h': str_arg_l+=sprintf(tmp+str_arg_l, f, int_arg); break; + case 'l': str_arg_l+=sprintf(tmp+str_arg_l, f, long_arg); break; +#ifdef SNPRINTF_LONGLONG_SUPPORT + case '2': str_arg_l+=sprintf(tmp+str_arg_l,f,long_long_arg); break; +#endif + } + } else { /* unsigned */ + switch (length_modifier) { + case '\0': + case 'h': str_arg_l+=sprintf(tmp+str_arg_l, f, uint_arg); break; + case 'l': str_arg_l+=sprintf(tmp+str_arg_l, f, ulong_arg); break; +#ifdef SNPRINTF_LONGLONG_SUPPORT + case '2': str_arg_l+=sprintf(tmp+str_arg_l,f,ulong_long_arg);break; +#endif + } + } + /* include the optional minus sign and possible "0x" + in the region before the zero padding insertion point */ + if (zero_padding_insertion_ind < str_arg_l && + tmp[zero_padding_insertion_ind] == '-') { + zero_padding_insertion_ind++; + } + if (zero_padding_insertion_ind+1 < str_arg_l && + tmp[zero_padding_insertion_ind] == '0' && + (tmp[zero_padding_insertion_ind+1] == 'x' || + tmp[zero_padding_insertion_ind+1] == 'X') ) { + zero_padding_insertion_ind += 2; + } + } + { size_t num_of_digits = str_arg_l - zero_padding_insertion_ind; + if (alternate_form && fmt_spec == 'o' +#ifdef HPUX_COMPATIBLE /* ("%#.o",0) -> "" */ + && (str_arg_l > 0) +#endif +#ifdef DIGITAL_UNIX_BUG_COMPATIBLE /* ("%#o",0) -> "00" */ +#else + /* unless zero is already the first character */ + && !(zero_padding_insertion_ind < str_arg_l + && tmp[zero_padding_insertion_ind] == '0') +#endif + ) { /* assure leading zero for alternate-form octal numbers */ + if (!precision_specified || precision < num_of_digits+1) { + /* precision is increased to force the first character to be zero, + except if a zero value is formatted with an explicit precision + of zero */ + precision = num_of_digits+1; precision_specified = 1; + } + } + /* zero padding to specified precision? */ + if (num_of_digits < precision) + number_of_zeros_to_pad = precision - num_of_digits; + } + /* zero padding to specified minimal field width? */ + if (!justify_left && zero_padding) { + int n = min_field_width - (str_arg_l+number_of_zeros_to_pad); + if (n > 0) number_of_zeros_to_pad += n; + } + break; + } + default: /* unrecognized conversion specifier, keep format string as-is*/ + zero_padding = 0; /* turn zero padding off for non-numeric convers. */ +#ifndef DIGITAL_UNIX_COMPATIBLE + justify_left = 1; min_field_width = 0; /* reset flags */ +#endif +#if defined(PERL_COMPATIBLE) || defined(LINUX_COMPATIBLE) + /* keep the entire format string unchanged */ + str_arg = starting_p; str_arg_l = p - starting_p; + /* well, not exactly so for Linux, which does something between, + * and I don't feel an urge to imitate it: "%+++++hy" -> "%+y" */ +#else + /* discard the unrecognized conversion, just keep * + * the unrecognized conversion character */ + str_arg = p; str_arg_l = 0; +#endif + if (*p) str_arg_l++; /* include invalid conversion specifier unchanged + if not at end-of-string */ + break; + } + if (*p) p++; /* step over the just processed conversion specifier */ + /* insert padding to the left as requested by min_field_width; + this does not include the zero padding in case of numerical conversions*/ + if (!justify_left) { /* left padding with blank or zero */ + int n = min_field_width - (str_arg_l+number_of_zeros_to_pad); + if (n > 0) { + if (str_l < str_m) { + size_t avail = str_m-str_l; + fast_memset(str+str_l, (zero_padding?'0':' '), (n>avail?avail:n)); + } + str_l += n; + } + } + /* zero padding as requested by the precision or by the minimal field width + * for numeric conversions required? */ + if (number_of_zeros_to_pad <= 0) { + /* will not copy first part of numeric right now, * + * force it to be copied later in its entirety */ + zero_padding_insertion_ind = 0; + } else { + /* insert first part of numerics (sign or '0x') before zero padding */ + int n = zero_padding_insertion_ind; + if (n > 0) { + if (str_l < str_m) { + size_t avail = str_m-str_l; + fast_memcpy(str+str_l, str_arg, (n>avail?avail:n)); + } + str_l += n; + } + /* insert zero padding as requested by the precision or min field width */ + n = number_of_zeros_to_pad; + if (n > 0) { + if (str_l < str_m) { + size_t avail = str_m-str_l; + fast_memset(str+str_l, '0', (n>avail?avail:n)); + } + str_l += n; + } + } + /* insert formatted string + * (or as-is conversion specifier for unknown conversions) */ + { int n = str_arg_l - zero_padding_insertion_ind; + if (n > 0) { + if (str_l < str_m) { + size_t avail = str_m-str_l; + fast_memcpy(str+str_l, str_arg+zero_padding_insertion_ind, + (n>avail?avail:n)); + } + str_l += n; + } + } + /* insert right padding */ + if (justify_left) { /* right blank padding to the field width */ + int n = min_field_width - (str_arg_l+number_of_zeros_to_pad); + if (n > 0) { + if (str_l < str_m) { + size_t avail = str_m-str_l; + fast_memset(str+str_l, ' ', (n>avail?avail:n)); + } + str_l += n; + } + } + } + } +#if defined(NEED_SNPRINTF_ONLY) + va_end(ap); +#endif + if (str_m > 0) { /* make sure the string is null-terminated + even at the expense of overwriting the last character + (shouldn't happen, but just in case) */ + str[str_l <= str_m-1 ? str_l : str_m-1] = '\0'; + } + /* Return the number of characters formatted (excluding trailing null + * character), that is, the number of characters that would have been + * written to the buffer if it were large enough. + * + * The value of str_l should be returned, but str_l is of unsigned type + * size_t, and snprintf is int, possibly leading to an undetected + * integer overflow, resulting in a negative return value, which is illegal. + * Both XSH5 and ISO C99 (at least the draft) are silent on this issue. + * Should errno be set to EOVERFLOW and EOF returned in this case??? + */ + return (int) str_l; +} +#endif +#endif /* ndef HAVE_SNPRINTF */ /* Local Variables: tab-width: 3