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/*
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* xdiff.cc - fuzzer harness for thirdparty/xdiff
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*
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* Copyright 2018, Google Inc.
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*
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* This software may be used and distributed according to the terms of
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* the GNU General Public License, incorporated herein by reference.
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*/
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#include "thirdparty/xdiff/xdiff.h"
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#include <inttypes.h>
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#include <stdlib.h>
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#include "fuzzutil.h"
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extern "C" {
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int hunk_consumer(long a1, long a2, long b1, long b2, void *priv)
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{
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// TODO: probably also test returning -1 from this when things break?
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return 0;
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}
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int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size)
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{
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// Don't allow fuzzer inputs larger than 100k, since we'll just bog
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// down and not accomplish much.
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if (Size > 100000) {
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return 0;
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}
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auto maybe_inputs = SplitInputs(Data, Size);
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if (!maybe_inputs) {
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return 0;
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}
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auto inputs = std::move(maybe_inputs.value());
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mmfile_t a, b;
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a.ptr = inputs.left.get();
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a.size = inputs.left_size;
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b.ptr = inputs.right.get();
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b.size = inputs.right_size;
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xpparam_t xpp = {
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XDF_INDENT_HEURISTIC, /* flags */
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};
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xdemitconf_t xecfg = {
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XDL_EMIT_BDIFFHUNK, /* flags */
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hunk_consumer, /* hunk_consume_func */
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};
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xdemitcb_t ecb = {
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NULL, /* priv */
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};
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xdl_diff(&a, &b, &xpp, &xecfg, &ecb);
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return 0; // Non-zero return values are reserved for future use.
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}
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#ifdef HG_FUZZER_INCLUDE_MAIN
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int main(int argc, char **argv)
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{
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const char data[] = "asdf";
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return LLVMFuzzerTestOneInput((const uint8_t *)data, 4);
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}
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#endif
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} // extern "C"
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