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util_string.c

/*
 * util_string.c -- string utility functions for hnb
 *
 * Copyright (C) 2003 Øyvind Kolås <pippin@users.sourceforge.net>
 *
 * 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, 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.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59
 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>

int string_isoneof(char *string, char **strings){
      while(*strings){
            if(!strcmp(string,*strings))
                  return 1;
            strings++;
      }
      
      return 0;
}


char *string_replace(char *string,  char **mappings ){
      char *newstring;
      
      if(!string)
            return NULL;
            
      /* allocate new string */
      {
            int oldlen=strlen(string);
            int newlen=oldlen;
            char *inpos=string;
            
            while(*inpos){
                  int match=0;
                  char **cmap=mappings;
                  while(*cmap && !match){
                        if(!strncmp(inpos,*cmap, strlen(*cmap) )){
                              inpos+=strlen(*cmap);
                              newlen+=(strlen(*(cmap+1))-strlen(*(cmap)));
                              match=1;
                        }
                        cmap+=2;
                  }
                  if(!match)
                        inpos++;
            }
            newstring=malloc(newlen+1); /* add room for \0 */
      }

      if(!newstring)
            return NULL;

      /* build new string */
      {
            char *inpos=string;
            char *outpos=newstring;
            
            while(*inpos){
                  int match=0;
                  char **cmap=mappings;
                  while(*cmap && !match){
                        if(!strncmp(inpos,*cmap, strlen(*cmap) )){
                              strcpy(outpos,*(cmap+1));
                              outpos+=strlen(*(cmap+1));
                              inpos+=strlen(*cmap);
                              match=1;
                        }
                        cmap+=2;
                  }
                  if(!match){
                        *(outpos++)=*(inpos++);
                  }
            }
            *outpos='\0';
      }
      
      return newstring;

}


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