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/* A poor man's dictionary, with order(N) search */
#include<string.h>
#include<stdlib.h>
#include<stdio.h>
#include "c2xsf.h"
void *dict_get(struct dct *dict, char *key){
while(dict){
if ((dict->key)&&(!strcmp(dict->key,key))) return dict->value;
dict=dict->next;
}
return NULL;
}
void dict_add(struct dct *dict, char *key, void *value){
if (!dict) error_exit("Null pointer passed to dict_add");
while(dict){
if ((dict->key)&&(!strcmp(dict->key,key))){
dict->value=value;
return;
}
if (dict->next)
dict=dict->next;
else
break;
}
/* If dict is unused, then dict->key will be NULL and
* one should store to the empty first entry. Else grow the list. */
if (dict->key){
dict->next=malloc(sizeof(struct dct));
if (!dict->next) error_exit("Malloc error for dict");
dict=dict->next;
dict->next=NULL;
}
dict->key=malloc(strlen(key)+1);
if (!dict->key) error_exit("Malloc error for dict key");
strcpy(dict->key,key);
dict->value=value;
}
/* Concatenate a string to an existing entry, or make a new entry
* if no existing entry. Use malloc() always, so can use realloc,
* even if called with string constants.
*/
void dict_strcat(struct dct *dict, char *key, char *value){
char *p;
if (!dict) error_exit("Null pointer passed to dict_strcat");
if (!dict_get(dict,key)){
p=malloc(strlen(value)+1);
if (!p) error_exit("Malloc failed in dict_strcat");
strcpy(p,value);
dict_add(dict,key,p);
return;
}
while(dict){
if ((dict->key)&&(!strcmp(dict->key,key))) break;
dict=dict->next;
}
if (strcmp(dict->key,key))
error_exit("Confusion in dict_strcat");
dict->value=realloc(dict->value,strlen(dict->value)+strlen(value)+1);
if (!dict->value)
error_exit("Realloc() failed in dict_strcat");
strcat(dict->value,value);
}
/* For debugging */
void dict_print(struct dct *dict){
while(dict){
fprintf(stderr,"%s: %p\n",dict->key,dict->value);
dict=dict->next;
}
}
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