#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <zconf.h>
#include <zlib.h>

#include "utils.h"
#include "filter.h"
#include "parse.h"
void *filter(char number, uint8_t * src, uint32_t srclen, void *dest,
	     unsigned long *destlen)
{
	switch (number) {
	case FLATEDECODE:
		return flatedecode(dest, destlen, src, srclen);
		/*case DCTDECODE:
		   return dctdecode(); */
	case HEXDECODE:
		return asciihexdecode(dest, src, srclen);
		/*case DECODE85:
		   return ascii85decode(); */
	}
	return NULL;
}

void *asciihexdecode(void *dest, uint8_t * src, int srclen)
{
	char *decode = (char *) xmalloc(srclen + 2);
	decode[0] = '<';
	strncpy(decode + 1, (char *) src, srclen);
	decode[srclen + 1] = '>';
	dest = (void *) hex(decode);
	return dest;
}

/*
char *ascii85decode(char *encoded)
{
    return;
}
*/
void *flatedecode(Bytef * dest, uLong * destlen, Bytef * src, uLong srclen)
{
	int i;
	i = uncompress(dest, destlen, src, srclen);
	switch (i) {
	case Z_OK:
		return dest;
	case Z_MEM_ERROR:
		fprintf(stderr, "Not enough memory!\n");
		break;
	case Z_BUF_ERROR:
		fprintf(stderr, "Not enough room in output buffer!\n");
		break;
	case Z_DATA_ERROR:
		fprintf(stderr, "Input buffer is corrupted!\n");
	}
	abort();
}
void *dctdecode(void)
{
	return NULL;
}

/*
char *lzwdecode(char *encoded)
{
    return;
}*/