/*
 * strtrap.c -- display string trap routine DEX2000 (AT side)
 *
 *	Copyright (C) 1997 by Sony Computer Entertainment
 *			All rights Reserved
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <malloc.h>
#include "strtrap.h"

static String_trap_element *top = NULL;

String_trap_element *
add_new_trap(char *trapstring, int (* action)(), void *actarg)
{
    String_trap_element *new;
    new = malloc(sizeof(String_trap_element));
    if( new == NULL )
	return NULL;
    new->action = action;
    new->actarg = actarg;
    new->key = create_search_key(trapstring,strlen(trapstring));
    if( new->key == NULL ) {
	free( new );
	return NULL;
    }
    new->next = top;
    top = new;
    return new;
}

void  delete_trap(String_trap_element *element)
{
    String_trap_element **ep;

    for( ep = &top; *ep != NULL; ep = &((*ep)->next) ) {
	if( *ep == element ) {
	    *ep = element->next;
	    free(element);
	    break;
	}
    }
}

void  rewind_trap(void)
{
    String_trap_element *ep;
    for( ep = top; ep != NULL; ep = ep->next )
	reset_search_key(ep->key);
}

int  trap_check(char *string, int strlen )
{
    String_trap_element *ep;
    for( ep = top; ep != NULL; ep = ep->next ) {
	search_key(string, strlen, ep->key);
	if( key_found_p(ep->key) ) {
	    rewind_trap();
	    if( ep->action != NULL )
		return (*(ep->action))(ep->actarg);
	    else
		return 1;
	}
    }
    return 0;
}