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- /*********************************************************************
- *
- * File : $Source: /cvsroot/ijbswa/current/ssplit.c,v $
- *
- * Purpose : A function to split a string at specified delimiters.
- *
- * Copyright : Written by and Copyright (C) 2001-2012 the
- * Privoxy team. https://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.
- *
- *********************************************************************/
- #include "config.h"
- #include <string.h>
- #include <stdlib.h>
- #include <assert.h>
- #include "ssplit.h"
- #include "miscutil.h"
- /*********************************************************************
- *
- * 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)
- *
- * 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[], size_t vec_len)
- {
- unsigned char is_delim[256];
- unsigned char char_type;
- int vec_count = 0;
- enum char_type {
- WANTED = 0,
- SEPARATOR = 1,
- TERMINATOR = 2,
- };
- 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++] = SEPARATOR;
- }
- is_delim[(unsigned)(unsigned char)'\0'] = TERMINATOR;
- is_delim[(unsigned)(unsigned char)'\n'] = TERMINATOR;
- /* Parse string */
- /* Skip leading separators. XXX: Why do they matter? */
- while (is_delim[(unsigned)(unsigned char)*str] == SEPARATOR)
- {
- str++;
- }
- /* The first pointer is the beginning of string */
- if (is_delim[(unsigned)(unsigned char)*str] == WANTED)
- {
- /*
- * 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++] = str;
- }
- while ((char_type = is_delim[(unsigned)(unsigned char)*str]) != TERMINATOR)
- {
- if (char_type == SEPARATOR)
- {
- /* the char is a separator */
- /* null terminate the substring */
- *str++ = '\0';
- /* Check if we want to save this field */
- if (is_delim[(unsigned)(unsigned char)*str] == WANTED)
- {
- /*
- * 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++] = str;
- }
- }
- else
- {
- str++;
- }
- }
- /* null terminate the substring */
- /* XXX: this shouldn't be necessary, so assert that it isn't. */
- assert(*str == '\0');
- *str = '\0';
- return(vec_count);
- }
- /*
- Local Variables:
- tab-width: 3
- end:
- */
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