/*
 * Data structure for dynamic string lists that works
 * similar to the stralloc library.
 * Return values: 1 if successful, 0 in case of failures.
 * afb 4/2003
 */
#include <stdlib.h>
#include "strlist.h"

/* assure that there is at least room for len list entries */
int strlist_ready(strlist* list, unsigned int len) {
   if (list->allocated < len) {
      unsigned int wanted = len + (len>>3) + 8;
      char** newlist = (char**) realloc(list->list,
         sizeof(char*) * wanted);
      if (newlist == 0) return 0;
      list->list = newlist;
      list->allocated = wanted;
   }
   return 1;
}

/* assure that there is room for len additional list entries */
int strlist_readyplus(strlist* list, unsigned int len) {
   return strlist_ready(list, list->len + len);
}

/* truncate the list to zero length */
int strlist_clear(strlist* list) {
   list->len = 0;
   return 1;
}

/* append the string pointer to the list */
int strlist_push(strlist* list, char* string) {
   if (!strlist_ready(list, list->len + 1)) return 0;
   list->list[list->len++] = string;
   return 1;
}

/* free the strlist data structure but not the strings */
int strlist_free(strlist* list) {
   free(list->list); list->list = 0;
   list->allocated = 0;
   list->len = 0;
   return 1;
}