fuzz: migrate bdiff fuzzer to use FuzzedDataProvider
Differential Revision: https://phab.mercurial-scm.org/D7368
/*
* 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 <memory>
#include <stdlib.h>
#include <fuzzer/FuzzedDataProvider.h>
extern "C" {
#include "bdiff.h"
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
{
FuzzedDataProvider provider(Data, Size);
std::string left = provider.ConsumeRandomLengthString(Size);
std::string right = provider.ConsumeRemainingBytesAsString();
struct bdiff_line *a, *b;
int an = bdiff_splitlines(left.c_str(), left.size(), &a);
int bn = bdiff_splitlines(right.c_str(), 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"