tor-android/external/privoxy/ssplit.c

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const char ssplit_rcs[] = "$Id: ssplit.c,v 1.9 2007/11/03 14:35:45 fabiankeil Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/ssplit.c,v $
*
* Purpose : A function to split a string at specified delimiters.
*
* Copyright : Written by and Copyright (C) 2001 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
*
* 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: ssplit.c,v $
* Revision 1.9 2007/11/03 14:35:45 fabiankeil
* Fix spelling in Purpose line. Patch submitted by Simon Ruderich.
*
* Revision 1.8 2006/07/18 14:48:47 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 1.6 2002/03/26 22:29:55 swa
* we have a new homepage!
*
* Revision 1.5 2002/03/24 13:25:43 swa
* name change related issues
*
* Revision 1.4 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 1.3 2001/05/29 08:54:25 jongfoster
* Rewrote the innards of ssplit() to be easier to understand,
* faster, and to use less memory. Didn't change the interface
* except to give the parameters meaningful names.
*
* Revision 1.2 2001/05/17 23:01:01 oes
* - Cleaned CRLF's from the sources and related files
*
* Revision 1.1.1.1 2001/05/15 13:59:04 oes
* Initial import of version 2.9.3 source tree
*
*
*********************************************************************/
#include "config.h"
#include <string.h>
#include <stdlib.h>
#include "ssplit.h"
#include "miscutil.h"
const char ssplit_h_rcs[] = SSPLIT_H_VERSION;
/* Define this for lots of debugging information to stdout */
#undef SSPLIT_VERBOSE
/* #define SSPLIT_VERBOSE 1 */
/*********************************************************************
*
* Function : ssplit
*
* Description : Split a string using delimiters in `delim'. Results
* go into `vec'.
*
* Parameters :
* 1 : str = string to split. Will be split in place
* (i.e. do not free until you've finished with vec,
* previous contents will be trashed by the call).
* 2 : delim = array of delimiters (if NULL, uses " \t").
* 3 : vec[] = results vector (aka. array) [out]
* 4 : vec_len = number of usable slots in the vector (aka. array size)
* 5 : dont_save_empty_fields = zero if consecutive delimiters
* give a null output field(s), nonzero if they are just
* to be considered as single delimeter
* 6 : ignore_leading = nonzero to ignore leading field
* separators.
*
* Returns : -1 => Error: vec_len is too small to hold all the
* data, or str == NULL.
* >=0 => the number of fields put in `vec'.
* On error, vec and str may still have been overwritten.
*
*********************************************************************/
int ssplit(char *str, const char *delim, char *vec[], int vec_len,
int dont_save_empty_fields, int ignore_leading)
{
unsigned char is_delim[256];
unsigned char char_type;
int vec_count = 0;
if (!str)
{
return(-1);
}
/* Build is_delim array */
memset(is_delim, '\0', sizeof(is_delim));
if (!delim)
{
delim = " \t"; /* default field separators */
}
while (*delim)
{
is_delim[(unsigned)(unsigned char)*delim++] = 1; /* separator */
}
is_delim[(unsigned)(unsigned char)'\0'] = 2; /* terminator */
is_delim[(unsigned)(unsigned char)'\n'] = 2; /* terminator */
/* Parse string */
if (ignore_leading)
{
/* skip leading separators */
while (is_delim[(unsigned)(unsigned char)*str] == 1)
{
str++;
}
}
/* first pointer is the beginning of string */
/* Check if we want to save this field */
if ( (!dont_save_empty_fields)
|| (is_delim[(unsigned)(unsigned char)*str] == 0) )
{
/*
* We want empty fields, or the first character in this
* field is not a delimiter or the end of string.
* So save it.
*/
if (vec_count >= vec_len)
{
return(-1); /* overflow */
}
vec[vec_count++] = (char *) str;
}
while ((char_type = is_delim[(unsigned)(unsigned char)*str]) != 2)
{
if (char_type == 1)
{
/* the char is a separator */
/* null terminate the substring */
*str++ = '\0';
/* Check if we want to save this field */
if ( (!dont_save_empty_fields)
|| (is_delim[(unsigned)(unsigned char)*str] == 0) )
{
/*
* We want empty fields, or the first character in this
* field is not a delimiter or the end of string.
* So save it.
*/
if (vec_count >= vec_len)
{
return(-1); /* overflow */
}
vec[vec_count++] = (char *) str;
}
}
else
{
str++;
}
}
*str = '\0'; /* null terminate the substring */
#ifdef SSPLIT_VERBOSE
{
int i;
printf("dump %d strings\n", vec_count);
for (i = 0; i < vec_count; i++)
{
printf("%d '%s'\n", i, vec[i]);
}
}
#endif /* def SSPLIT_VERBOSE */
return(vec_count);
}
/*
Local Variables:
tab-width: 3
end:
*/