const char ssplit_rcs[] = "$Id: ssplit.c,v 1.17 2012/07/23 12:44:30 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. * *********************************************************************/ #include "config.h" #include #include #include "ssplit.h" #include "miscutil.h" const char ssplit_h_rcs[] = SSPLIT_H_VERSION; /********************************************************************* * * 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 */ *str = '\0'; return(vec_count); } /* Local Variables: tab-width: 3 end: */