/*
* xdiff.cc - fuzzer harness for thirdparty/xdiff
*
* 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 "thirdparty/xdiff/xdiff.h"
#include <inttypes.h>
#include <stdlib.h>
#include "fuzzutil.h"
extern "C" {
int hunk_consumer(long a1, long a2, long b1, long b2, void *priv)
{
// TODO: probably also test returning -1 from this when things break?
return 0;
}
int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
{
// Don't allow fuzzer inputs larger than 100k, since we'll just bog
// down and not accomplish much.
if (Size > 100000) {
return 0;
}
auto maybe_inputs = SplitInputs(Data, Size);
if (!maybe_inputs) {
return 0;
}
auto inputs = std::move(maybe_inputs.value());
mmfile_t a, b;
a.ptr = inputs.left.get();
a.size = inputs.left_size;
b.ptr = inputs.right.get();
b.size = inputs.right_size;
xpparam_t xpp = {
XDF_INDENT_HEURISTIC, /* flags */
};
xdemitconf_t xecfg = {
XDL_EMIT_BDIFFHUNK, /* flags */
hunk_consumer, /* hunk_consume_func */
};
xdemitcb_t ecb = {
NULL, /* priv */
};
xdl_diff(&a, &b, &xpp, &xecfg, &ecb);
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"