#include <stdlib.h>
#include <string.h>
#include <zlib.h>
#include "../config.h"
#include "compression.h"
#include "logging.h"

static void
zlib_err(int status)
{
	switch (status) {
		case Z_OK:
		case Z_STREAM_END:
			break;
		case Z_MEM_ERROR:
			err(1, "zlib error: out of memory");
			break;
		case Z_VERSION_ERROR:
			err(1, "zlib error: incompatible library version");
			break;
		case Z_STREAM_ERROR:
			err(1, "zlib error: invalid stream");
			break;
		case Z_NEED_DICT:
			err(1, "zlib error: need dictionary");
			break;
		case Z_DATA_ERROR:
			err(1, "zlib error: corrupted data");
			break;
		case Z_BUF_ERROR:
			err(1, "zlib error: buffer error");
			break;
		default:
			err(1, "zlib error: unknown");
			break;
	}
}

void
decompress(char *src, size_t src_len, char *dest, size_t dest_len)
{
	z_stream d_stream;

	d_stream.zalloc = Z_NULL;
	d_stream.zfree = Z_NULL;
	d_stream.opaque = Z_NULL;
	d_stream.next_in = (Bytef *) src;
	d_stream.avail_in = src_len;
	d_stream.next_out = (Bytef *) dest;
	d_stream.avail_out = dest_len;

#ifdef DEBUG_COMPRESSION
	debug("Initializing inflation stream...");
#endif
	zlib_err(inflateInit2(&d_stream, 15 + 32));

#ifdef DEBUG_COMPRESSION
	debug("Inflating %d bytes into up to %d bytes...", src_len, dest_len);
#endif
	zlib_err(inflate(&d_stream, Z_NO_FLUSH));

#ifdef DEBUG_COMPRESSION
	debug("Ending inflation stream...");
#endif
	zlib_err(inflateEnd(&d_stream));
}

#if 0
#include <stdio.h>
#include "base64.h"

int
main()
{
	char decoded_data[4801], compressed_data[4801], decompressed_data[4801];

	base64_decode(
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAAAcAAAAHQAAAB0AAAAeAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAAAcAAAA"
			"HQAAAB0AAAAeAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAAAcAAAAHQAAAB0AAAAeAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAAAcAAAAHQAAAB0AAAAeAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAAAMAAAADQAAAA0AAAANAAAADQAAAA0AAABvAAAA"
			"HQAAAB0AAAAeAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAAAcAAAAHQAAAB0AAAAdAAAA"
			"HQAAAB0AAAAdAAAAHQAAAB0AAAAeAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAAAcAAAA"
			"HQAAAB0AAAAdAAAAHQAAAB0AAAAdAAAAHQAAAB0AAAAeAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAAAcAAAAHQAAAB0AAACAAAAALQAAAC0AAAAtAAAA"
			"LQAAAC0AAAAuAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAAAcAAAAHQAAAB0AAAAeAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAAAcAAAA"
			"HQAAAB0AAAAeAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAAAcAAAAHQAAAB0AAAAeAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAAAcAAAAHQAAAB0AAAAeAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAAAcAAAA"
			"HQAAAB0AAAAeAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAAAcAAAAHQAAAB0AAAAeAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAAAcAAAAHQAAAB0AAAAeAAAA"
			"TwAAAFAAAAAMAAAADQAAAA0AAAANAAAADQAAAA0AAAANAAAA"
			"DQAAAA0AAAANAAAADQAAAA4AAABPAAAAUAAAAE8AAABQAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAAAcAAAA"
			"HQAAAB0AAAAeAAAAXwAAAGAAAAAcAAAAHQAAAB0AAAAdAAAA"
			"HQAAAB0AAAAdAAAAHQAAAB0AAAAdAAAAHQAAAB4AAABfAAAA"
			"YAAAAF8AAABgAAAATwAAAFAAAAAMAAAADQAAAA0AAAANAAAA"
			"DQAAAA0AAABvAAAAHQAAAB0AAAAeAAAATwAAAFAAAAAcAAAA"
			"HQAAAB0AAAAdAAAAHQAAAB0AAAAdAAAAHQAAAB0AAAAdAAAA"
			"HQAAAB4AAABPAAAAUAAAAE8AAABQAAAAXwAAAGAAAAAcAAAA"
			"HQAAAB0AAAAdAAAAHQAAAB0AAAAdAAAAHQAAAB0AAAAeAAAA"
			"XwAAAGAAAAAcAAAAHQAAAB0AAACAAAAALQAAAC0AAAAtAAAA"
			"LQAAAH8AAAAdAAAAHQAAAB4AAABfAAAAYAAAAF8AAABgAAAA"
			"TwAAAFAAAAAcAAAAHQAAAB0AAAAdAAAAHQAAAB0AAAAdAAAA"
			"HQAAAB0AAAAeAAAATwAAAFAAAAAcAAAAHQAAAB0AAAAeAAAA"
			"TwAAAFAAAABPAAAAUAAAABwAAAAdAAAAHQAAAB4AAABPAAAA"
			"UAAAAE8AAABQAAAAXwAAAGAAAAAcAAAAHQAAAB0AAACAAAAA"
			"LQAAAC0AAAAtAAAALQAAAC0AAAAuAAAAXwAAAGAAAAAcAAAA"
			"HQAAAB0AAAAeAAAAXwAAAGAAAABfAAAAYAAAABwAAAAdAAAA"
			"HQAAAB4AAABfAAAAYAAAAF8AAABgAAAATwAAAFAAAAAcAAAA"
			"HQAAAB0AAAAeAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAAAcAAAAHQAAAB0AAAAeAAAATwAAAFAAAABPAAAA"
			"UAAAABwAAAAdAAAAHQAAAB4AAABPAAAAUAAAAE8AAABQAAAA"
			"XwAAAGAAAAAcAAAAHQAAAB0AAAAeAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAAAcAAAAHQAAAB0AAAAeAAAA"
			"XwAAAGAAAABfAAAAYAAAABwAAAAdAAAAHQAAAB4AAABfAAAA"
			"YAAAAF8AAABgAAAATwAAAFAAAAAcAAAAHQAAAB0AAAAeAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAAAcAAAA"
			"HQAAAB0AAAAeAAAATwAAAFAAAABPAAAAUAAAABwAAAAdAAAA"
			"HQAAAB4AAABPAAAAUAAAAE8AAABQAAAAXwAAAGAAAAAcAAAA"
			"HQAAAB0AAAAeAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAAAcAAAAHQAAAB0AAAAeAAAAXwAAAGAAAABfAAAA"
			"YAAAABwAAAAdAAAAHQAAAB4AAABfAAAAYAAAAF8AAABgAAAA"
			"TwAAAFAAAAAcAAAAHQAAAB0AAABwAAAADQAAAA0AAAANAAAA"
			"DQAAAA0AAAANAAAADQAAAA0AAABvAAAAHQAAAB0AAAAeAAAA"
			"TwAAAFAAAABPAAAAUAAAABwAAAAdAAAAHQAAAB4AAABPAAAA"
			"UAAAAE8AAABQAAAAXwAAAGAAAAAcAAAAHQAAAB0AAAAdAAAA"
			"HQAAAB0AAAAdAAAAHQAAAB0AAAAdAAAAHQAAAB0AAAAdAAAA"
			"HQAAAB0AAAAeAAAAXwAAAGAAAABfAAAAYAAAABwAAAAdAAAA"
			"HQAAAB4AAABfAAAAYAAAAF8AAABgAAAATwAAAFAAAAAcAAAA"
			"HQAAAB0AAAAdAAAAHQAAAB0AAAAdAAAAHQAAAB0AAAAdAAAA"
			"HQAAAB0AAAAdAAAAHQAAAB0AAAAeAAAATwAAAFAAAABPAAAA"
			"UAAAABwAAAAdAAAAHQAAAB4AAABPAAAAUAAAAE8AAABQAAAA"
			"XwAAAGAAAAAsAAAALQAAAC0AAAAtAAAALQAAAC0AAAAtAAAA"
			"LQAAAC0AAAAtAAAALQAAAC0AAAAtAAAALQAAAC0AAAAuAAAA"
			"XwAAAGAAAABfAAAAYAAAABwAAAAdAAAAHQAAAB4AAABfAAAA"
			"YAAAAF8AAABgAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAABPAAAAUAAAABwAAAAdAAAA"
			"HQAAAB4AAABPAAAAUAAAAE8AAABQAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAABfAAAA"
			"YAAAABwAAAAdAAAAHQAAAB4AAABfAAAAYAAAAF8AAABgAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAABPAAAAUAAAABwAAAAdAAAAHQAAAB4AAABPAAAA"
			"UAAAAE8AAABQAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAABfAAAAYAAAABwAAAAdAAAA"
			"HQAAAB4AAABfAAAAYAAAAF8AAABgAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAADAAAAA0AAAANAAAA"
			"DQAAAG8AAAAdAAAAHQAAAB4AAABPAAAAUAAAAE8AAABQAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"HAAAAB0AAAAdAAAAHQAAAB0AAAAdAAAAHQAAAB4AAABfAAAA"
			"YAAAAF8AAABgAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAAHAAAAB0AAAAdAAAAHQAAAB0AAAAdAAAA"
			"HQAAAB4AAABPAAAAUAAAAE8AAABQAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAHAAAAB0AAAAdAAAA"
			"gAAAAC0AAAAtAAAALQAAAC4AAABfAAAAYAAAAF8AAABgAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"HAAAAB0AAAAdAAAAHgAAAE8AAABQAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAHAAAAB0AAAAdAAAAHgAAAF8AAABgAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAATwAAAFAAAABPAAAA"
			"UAAAAE8AAABQAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"TwAAAFAAAABPAAAAUAAAAE8AAABQAAAAHAAAAB0AAAAdAAAA"
			"HgAAAE8AAABQAAAATwAAAFAAAABPAAAAUAAAAE8AAABQAAAA"
			"XwAAAGAAAABfAAAAYAAAAF8AAABgAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAAXwAAAGAAAABfAAAAYAAAAF8AAABgAAAA"
			"HAAAAB0AAAAdAAAAHgAAAF8AAABgAAAAXwAAAGAAAABfAAAA"
			"YAAAAF8AAABgAAAA",
			decoded_data, 4801);
	base64_decode(
			"eJztlsERAjEIRSlArUCtwLWVtQPtQDtwS18OHpwdIvwv7EFz"
			"+MMhkyEvgR9GEbmoRjDuVYeXjsT+q+pGxGVedD96zl/n3ai2"
			"hu7FvO9cLVXwRvNW8k6qwdC5mJfhyuBl3rHzdl6Et+VjlnaJ"
			"vBE/+XRPrA+jeVu8qA97PvYM8qI+7NW5t876sFfn3jrbpxW8"
			"kT7tvN/zPsT3IG++YnhRZfEyeVnek9g9G5E1X0V5s2OUNzt2"
			"3hre5f/t9XcFHzJvZL4nMm9k8k7i9/da9bsGb+Q/+zfeGUt8"
			"RgE=",
			compressed_data, 4801);
	decompress(compressed_data, decompressed_data, 4801);
	decoded_data[4800] = '\0';
	compressed_data[4800] = '\0';
	decompressed_data[4800] = '\0';
	if (strncmp(decoded_data, decompressed_data, 4800) == 0) {
		puts("Matched!");
	} else {
		puts("No match. :(");
	}

	return 0;
}
#endif