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tor-android/external/privoxy/miscutil.c

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adding in privoxy directly to Orbot repo
2012-05-03 18:32:18 +00:00
const char miscutil_rcs[] = "$Id: miscutil.c,v 1.62 2008/12/04 18:16:41 fabiankeil Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/miscutil.c,v $
*
* Purpose : zalloc, hash_string, safe_strerror, strcmpic,
* strncmpic, chomp, 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) 2001-2007
* the SourceForge Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* by and Copyright (C) 1997 Anonymous Coders and
* Junkbusters Corporation. http://www.junkbusters.com
*
* 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
* your option) any later version.
*
* This program is distributed in the hope that it will
* be useful, but WITHOUT ANY WARRANTY; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public
* License for more details.
*
* The GNU General Public License should be included with
* this file. If not, you can view it at
* http://www.gnu.org/copyleft/gpl.html
* or write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Revisions :
* $Log: miscutil.c,v $
* Revision 1.62 2008/12/04 18:16:41 fabiankeil
* Fix some cparser warnings.
*
* Revision 1.61 2008/10/18 11:09:23 fabiankeil
* Improve seed used by pick_from_range() on mingw32.
*
* Revision 1.60 2008/09/07 12:35:05 fabiankeil
* Add mutex lock support for _WIN32.
*
* Revision 1.59 2008/09/04 08:13:58 fabiankeil
* Prepare for critical sections on Windows by adding a
* layer of indirection before the pthread mutex functions.
*
* Revision 1.58 2008/04/17 14:53:30 fabiankeil
* Move simplematch() into urlmatch.c as it's only
* used to match (old-school) domain patterns.
*
* Revision 1.57 2008/03/24 15:29:51 fabiankeil
* Pet gcc43.
*
* Revision 1.56 2007/12/01 12:59:05 fabiankeil
* Some sanity checks for pick_from_range().
*
* Revision 1.55 2007/11/03 17:34:49 fabiankeil
* Log the "weak randomization factor" warning only
* once for mingw32 and provide some more details.
*
* Revision 1.54 2007/09/19 20:28:37 fabiankeil
* If privoxy_strlcpy() is called with a "buffer" size
* of 0, don't touch whatever destination points to.
*
* Revision 1.53 2007/09/09 18:20:20 fabiankeil
* Turn privoxy_strlcpy() into a function and try to work with
* b0rked snprintf() implementations too. Reported by icmp30.
*
* Revision 1.52 2007/08/19 12:32:34 fabiankeil
* Fix a conversion warning.
*
* Revision 1.51 2007/06/17 16:12:22 fabiankeil
* #ifdef _WIN32 the last commit. According to David Shaw,
* one of the gnupg developers, the changes are mingw32-specific.
*
* Revision 1.50 2007/06/10 14:59:59 fabiankeil
* Change replacement timegm() to better match our style, plug a small
* but guaranteed memory leak and fix "time zone breathing" on mingw32.
*
* Revision 1.49 2007/05/11 11:48:15 fabiankeil
* - Delete strsav() which was replaced
* by string_append() years ago.
* - Add a strlcat() look-alike.
* - Use strlcat() and strlcpy() in those parts
* of the code that are run on unixes.
*
* Revision 1.48 2007/04/09 17:48:51 fabiankeil
* Check for HAVE_SNPRINTF instead of __OS2__
* before including the portable snprintf() code.
*
* Revision 1.47 2007/03/17 11:52:15 fabiankeil
* - Use snprintf instead of sprintf.
* - Mention copyright for the replacement
* functions in the copyright header.
*
* Revision 1.46 2007/01/18 15:03:20 fabiankeil
* Don't include replacement timegm() if
* putenv() or tzset() isn't available.
*
* Revision 1.45 2006/12/26 17:31:41 fabiankeil
* Mutex protect rand() if POSIX threading
* is used, warn the user if that's not possible
* and stop using it on _WIN32 where it could
* cause crashes.
*
* Revision 1.44 2006/11/07 12:46:43 fabiankeil
* Silence compiler warning on NetBSD 3.1.
*
* Revision 1.43 2006/09/23 13:26:38 roro
* Replace TABs by spaces in source code.
*
* Revision 1.42 2006/09/09 14:01:45 fabiankeil
* Integrated Oliver Yeoh's domain pattern fix
* to make sure *x matches xx. Closes Patch 1217393
* and Bug 1170767.
*
* Revision 1.41 2006/08/18 16:03:17 david__schmidt
* Tweak for OS/2 build happiness.
*
* Revision 1.40 2006/08/17 17:15:10 fabiankeil
* - Back to timegm() using GnuPG's replacement if necessary.
* Using mktime() and localtime() could add a on hour offset if
* the randomize factor was big enough to lead to a summer/wintertime
* switch.
*
* - Removed now-useless Privoxy 3.0.3 compatibility glue.
*
* - Moved randomization code into pick_from_range().
*
* - Changed parse_header_time definition.
* time_t isn't guaranteed to be signed and
* if it isn't, -1 isn't available as error code.
* Changed some variable types in client_if_modified_since()
* because of the same reason.
*
* Revision 1.39 2006/07/18 14:48:46 david__schmidt
* Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
* with what was really the latest development (the v_3_0_branch branch)
*
* Revision 1.37.2.4 2003/12/01 14:45:14 oes
* Fixed two more problems with wildcarding in simplematch()
*
* Revision 1.37.2.3 2003/11/20 11:39:24 oes
* Bugfix: The "?" wildcard for domain names had never been implemented. Ooops\!
*
* Revision 1.37.2.2 2002/11/12 14:28:18 oes
* Proper backtracking in simplematch; fixes bug #632888
*
* Revision 1.37.2.1 2002/09/25 12:58:51 oes
* Made strcmpic and strncmpic safe against NULL arguments
* (which are now treated as empty strings).
*
* Revision 1.37 2002/04/26 18:29:43 jongfoster
* Fixing this Visual C++ warning:
* miscutil.c(710) : warning C4090: '=' : different 'const' qualifiers
*
* Revision 1.36 2002/04/26 12:55:38 oes
* New function string_toupper
*
* Revision 1.35 2002/03/26 22:29:55 swa
* we have a new homepage!
*
* Revision 1.34 2002/03/24 13:25:43 swa
* name change related issues
*
* Revision 1.33 2002/03/07 03:46:53 oes
* Fixed compiler warnings etc
*
* Revision 1.32 2002/03/06 23:02:57 jongfoster
* Removing tabs
*
* Revision 1.31 2002/03/05 04:52:42 oes
* Deleted non-errlog debugging code
*
* Revision 1.30 2002/03/04 18:27:42 oes
* - Deleted deletePidFile
* - Made write_pid_file use the --pidfile option value
* (or no PID file, if the option was absent)
* - Played styleguide police
*
* Revision 1.29 2002/03/04 02:08:02 david__schmidt
* Enable web editing of actions file on OS/2 (it had been broken all this time!)
*
* Revision 1.28 2002/03/03 09:18:03 joergs
* Made jumbjuster work on AmigaOS again.
*
* Revision 1.27 2002/01/21 00:52:32 jongfoster
* Adding string_join()
*
* Revision 1.26 2001/12/30 14:07:32 steudten
* - Add signal handling (unix)
* - Add SIGHUP handler (unix)
* - Add creation of pidfile (unix)
* - Add action 'top' in rc file (RH)
* - Add entry 'SIGNALS' to manpage
* - Add exit message to logfile (unix)
*
* Revision 1.25 2001/11/13 00:16:38 jongfoster
* Replacing references to malloc.h with the standard stdlib.h
* (See ANSI or K&R 2nd Ed)
*
* Revision 1.24 2001/11/05 21:41:43 steudten
* Add changes to be a real daemon just for unix os.
* (change cwd to /, detach from controlling tty, set
* process group and session leader to the own process.
* Add DBG() Macro.
* Add some fatal-error log message for failed malloc().
* Add '-d' if compiled with 'configure --with-debug' to
* enable debug output.
*
* Revision 1.23 2001/10/29 03:48:10 david__schmidt
* OS/2 native needed a snprintf() routine. Added one to miscutil, brackedted
* by and __OS2__ ifdef.
*
* Revision 1.22 2001/10/26 17:39:38 oes
* Moved ijb_isspace and ijb_tolower to project.h
*
* Revision 1.21 2001/10/23 21:27:50 jongfoster
* Standardising error codes in string_append
* make_path() no longer adds '\\' if the dir already ends in '\\' (this
* is just copying a UNIX-specific fix to the Windows-specific part)
*
* Revision 1.20 2001/10/22 15:33:56 david__schmidt
* Special-cased OS/2 out of the Netscape-abort-on-404-in-js problem in
* filters.c. Added a FIXME in front of the offending code. I'll gladly
* put in a better/more robust fix for all parties if one is presented...
* It seems that just returning 200 instead of 404 would pretty much fix
* it for everyone, but I don't know all the history of the problem.
*
* Revision 1.19 2001/10/14 22:02:57 jongfoster
* New function string_append() which is like strsav(), but running
* out of memory isn't automatically FATAL.
*
* Revision 1.18 2001/09/20 13:33:43 steudten
*
* change long to int as return value in hash_string(). Remember the wraparound
* for int = long = sizeof(4) - thats maybe not what we want.
*
* Revision 1.17 2001/09/13 20:51:29 jongfoster
* Fixing potential problems with characters >=128 in simplematch()
* This was also a compiler warning.
*
* Revision 1.16 2001/09/10 10:56:59 oes
* Silenced compiler warnings
*
* Revision 1.15 2001/07/13 14:02:24 oes
* Removed vim-settings
*
* Revision 1.14 2001/06/29 21:45:41 oes
* Indentation, CRLF->LF, Tab-> Space
*
* 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 <stdio.h>
#include <sys/types.h>
#include <stdlib.h>
#if !defined(_WIN32) && !defined(__OS2__)
#include <unistd.h>
#endif /* #if !defined(_WIN32) && !defined(__OS2__) */
#include <string.h>
#include <ctype.h>
#include <assert.h>
#if !defined(HAVE_TIMEGM) && defined(HAVE_TZSET) && defined(HAVE_PUTENV)
#include <time.h>
#endif /* !defined(HAVE_TIMEGM) && defined(HAVE_TZSET) && defined(HAVE_PUTENV) */
#include "project.h"
#include "miscutil.h"
#include "errlog.h"
#include "jcc.h"
const char miscutil_h_rcs[] = MISCUTIL_H_VERSION;
/*********************************************************************
*
* Function : zalloc
*
* Description : Malloc some memory and set it to '\0'.
* The way calloc() ought to be -acjc
*
* Parameters :
* 1 : size = Size of memory chunk to return.
*
* Returns : Pointer to newly malloc'd memory chunk.
*
*********************************************************************/
void *zalloc(size_t size)
{
void * ret;
if ((ret = (void *)malloc(size)) != NULL)
{
memset(ret, 0, size);
}
return(ret);
}
#if defined(unix)
/*********************************************************************
*
* Function : write_pid_file
*
* Description : Writes a pid file with the pid of the main process
*
* Parameters : None
*
* Returns : N/A
*
*********************************************************************/
void write_pid_file(void)
{
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_INFO, "can't open pidfile '%s': %E", pidfile);
}
else
{
fprintf(fp, "%u\n", (unsigned int) getpid());
fclose (fp);
}
return;
}
#endif /* def unix */
/*********************************************************************
*
* Function : hash_string
*
* 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.
*
* Parameters :
* 1 : s : string to be hashed.
*
* Returns : an unsigned long variable with the hashed value.
*
*********************************************************************/
unsigned int hash_string( const char* s )
{
unsigned int h = 0;
for ( ; *s; ++s )
{
h = 5 * h + (unsigned int)*s;
}
return (h);
}
#ifdef __MINGW32__
/*********************************************************************
*
* Function : strdup
*
* 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.
*
* Parameters :
* 1 : s = string to duplicate
*
* Returns : Pointer to newly malloc'ed copy of the string.
*
*********************************************************************/
char *strdup( const char *s )
{
char * result = (char *)malloc( strlen(s)+1 );
if (result != NULL)
{
strcpy( result, s );
}
return( result );
}
#endif /* def __MINGW32__ */
/*********************************************************************
*
* Function : safe_strerror
*
* Description : Variant of the library routine strerror() which will
* work on systems without the library routine, and
* which should never return NULL.
*
* Parameters :
* 1 : err = the `errno' of the last operation.
*
* Returns : An "English" string of the last `errno'. Allocated
* with strdup(), so caller frees. May be NULL if the
* system is out of memory.
*
*********************************************************************/
char *safe_strerror(int err)
{
char *s = NULL;
char buf[BUFFER_SIZE];
#ifdef HAVE_STRERROR
s = strerror(err);
#endif /* HAVE_STRERROR */
if (s == NULL)
{
snprintf(buf, sizeof(buf), "(errno = %d)", err);
s = buf;
}
return(strdup(s));
}
/*********************************************************************
*
* Function : strcmpic
*
* Description : Case insensitive string comparison
*
* Parameters :
* 1 : s1 = string 1 to compare
* 2 : s2 = string 2 to compare
*
* Returns : 0 if s1==s2, Negative if s1<s2, Positive if s1>s2
*
*********************************************************************/
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) ) )
{
break;
}
s1++, s2++;
}
return(ijb_tolower(*s1) - ijb_tolower(*s2));
}
/*********************************************************************
*
* Function : strncmpic
*
* Description : Case insensitive string comparison (upto n characters)
*
* Parameters :
* 1 : s1 = string 1 to compare
* 2 : s2 = string 2 to compare
* 3 : n = maximum characters to compare
*
* Returns : 0 if s1==s2, Negative if s1<s2, Positive if s1>s2
*
*********************************************************************/
int strncmpic(const char *s1, const char *s2, size_t n)
{
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) ) )
{
break;
}
if (--n <= (size_t)0) break;
s1++, s2++;
}
return(ijb_tolower(*s1) - ijb_tolower(*s2));
}
/*********************************************************************
*
* Function : chomp
*
* Description : In-situ-eliminate all leading and trailing whitespace
* from a string.
*
* Parameters :
* 1 : s : string to be chomped.
*
* Returns : chomped string
*
*********************************************************************/
char *chomp(char *string)
{
char *p, *q, *r;
/*
* strip trailing whitespace
*/
p = string + strlen(string);
while (p > string && ijb_isspace(*(p-1)))
{
p--;
}
*p = '\0';
/*
* find end of leading whitespace
*/
q = r = string;
while (*q && ijb_isspace(*q))
{
q++;
}
/*
* if there was any, move the rest forwards
*/
if (q != string)
{
while (q <= p)
{
*r++ = *q++;
}
}
return(string);
}
/*********************************************************************
*
* Function : string_append
*
* 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 : 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 : 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.
*
*********************************************************************/
jb_err string_append(char **target_string, const char *text_to_append)
{
size_t old_len;
char *new_string;
size_t new_size;
assert(target_string);
assert(text_to_append);
if (*target_string == NULL)
{
return JB_ERR_MEMORY;
}
if (*text_to_append == '\0')
{
return JB_ERR_OK;
}
old_len = strlen(*target_string);
new_size = strlen(text_to_append) + old_len + 1;
if (NULL == (new_string = realloc(*target_string, new_size)))
{
free(*target_string);
*target_string = NULL;
return JB_ERR_MEMORY;
}
strlcpy(new_string + old_len, text_to_append, new_size - old_len);
*target_string = new_string;
return JB_ERR_OK;
}
/*********************************************************************
*
* 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.
*
* 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 : 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 : 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).
*
*********************************************************************/
jb_err string_join(char **target_string, char *text_to_append)
{
jb_err err;
assert(target_string);
if (text_to_append == NULL)
{
freez(*target_string);
return JB_ERR_MEMORY;
}
err = string_append(target_string, text_to_append);
freez(text_to_append);
return err;
}
/*********************************************************************
*
* 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;
if (!string || ((result = (char *) zalloc(strlen(string) + 1)) == NULL))
{
return NULL;
}
q = string;
p = result;
while (*q != '\0')
{
*p++ = (char)toupper((int) *q++);
}
return result;
}
/*********************************************************************
*
* Function : bindup
*
* Description : Duplicate the first n characters of a string that may
* contain '\0' characters.
*
* Parameters :
* 1 : string = string to be duplicated
* 2 : len = number of bytes to duplicate
*
* Returns : pointer to copy, or NULL if failiure
*
*********************************************************************/
char *bindup(const char *string, size_t len)
{
char *duplicate;
if (NULL == (duplicate = (char *)malloc(len)))
{
return NULL;
}
else
{
memcpy(duplicate, string, len);
}
return duplicate;
}
/*********************************************************************
*
* Function : make_path
*
* 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.
*
* Parameters :
* 1 : dir: Name of directory or NULL for none.
* 2 : file: Name of file. Should not be NULL or empty.
*
* 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)
*
*********************************************************************/
char * make_path(const char * dir, const char * file)
{
#ifdef AMIGA
char path[512];
if(dir)
{
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
{
path[0]=0;
}
if(AddPart(path,file,512))
{
return strdup(path);
}
else
{
return NULL;
}
#else /* ndef AMIGA */
if ((file == NULL) || (*file == '\0'))
{
return NULL; /* Error */
}
if ((dir == NULL) || (*dir == '\0') /* No directory specified */
#if defined(_WIN32) || defined(__OS2__)
|| (*file == '\\') || (file[1] == ':') /* Absolute path (DOS) */
#else /* ifndef _WIN32 || __OS2__ */
|| (*file == '/') /* Absolute path (U*ix) */
#endif /* ifndef _WIN32 || __OS2__ */
)
{
return strdup(file);
}
else
{
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);
}
#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;
}
#endif /* ndef AMIGA */
}
/*********************************************************************
*
* 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_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_RANDOM) */
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
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 <mark.martinec@ijs.si>, April 1999, June 2000
Copyright <EFBFBD> 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 <sys/types.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include <errno.h>
#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, <mark.martinec@ijs.si>\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 inbetween,
* 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
end:
*/