/*

 * bdiff.cc - fuzzer harness for bdiff.c

 *

 * Copyright 2018, Google Inc.

 *

 * This software may be used and distributed according to the terms of

 * the GNU General Public License, incorporated herein by reference.

 */

#include <stdlib.h>

extern "C" {

#include "bdiff.h"

int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)

{

	if (!Size) {

		return 0;

	}

	// figure out a random point in [0, Size] to split our input.

	size_t split = Data[0] / 255.0 * Size;

	// left input to diff is data[1:split]

	const uint8_t *left = Data + 1;

	// which has len split-1

	size_t left_size = split - 1;

	// right starts at the next byte after left ends

	const uint8_t *right = left + left_size;

	size_t right_size = Size - split;

	struct bdiff_line *a, *b;

	int an = bdiff_splitlines((const char *)left, split - 1, &a);

	int bn = bdiff_splitlines((const char *)right, right_size, &b);

	struct bdiff_hunk l;

	bdiff_diff(a, an, b, bn, &l);

	free(a);

	free(b);

	bdiff_freehunks(l.next);

	return 0; // Non-zero return values are reserved for future use.

}

#ifdef HG_FUZZER_INCLUDE_MAIN

int main(int argc, char **argv)

{

	const char data[] = "asdf";

	return LLVMFuzzerTestOneInput((const uint8_t *)data, 4);

}

#endif

} // extern "C"