view contrib/fuzz/fuzzutil.h @ 40084:2cf18f46a1ce

narrow: only walk files within narrowspec also for committed revisions

Narrow has been walking only paths matching the narrowspec when
walking the working copy. We have not done the same filtering when
walking committed revisions (e.g. "hg files -r "), which seems a
little odd. Let's make it consistent.

Differential Revision: https://phab.mercurial-scm.org/D4898

#ifndef CONTRIB_FUZZ_FUZZUTIL_H
#define CONTRIB_FUZZ_FUZZUTIL_H
#include <iostream>
#include <memory>
#include <stdint.h>

/* Try and use std::optional, but failing that assume we'll have a
 * workable https://abseil.io/ install on the include path to get
 * their backport of std::optional. */
#ifdef __has_include
#if __has_include(<optional>) && __cplusplus >= 201703L
#include <optional>
#define CONTRIB_FUZZ_HAVE_STD_OPTIONAL
#endif
#endif
#ifdef CONTRIB_FUZZ_HAVE_STD_OPTIONAL
namespace contrib
{
using std::nullopt;
using std::optional;
} /* namespace contrib */
#else
#include "third_party/absl/types/optional.h"
namespace contrib
{
using absl::nullopt;
using absl::optional;
} /* namespace contrib */
#endif

/* set DEBUG to 1 for a few debugging prints, or 2 for a lot */
#define DEBUG 0
#define LOG(level)                                                             \
	if (level <= DEBUG)                                                    \
	std::cout

struct two_inputs {
	std::unique_ptr<char[]> right;
	size_t right_size;
	std::unique_ptr<char[]> left;
	size_t left_size;
};

/* Split a non-zero-length input into two inputs. */
contrib::optional<two_inputs> SplitInputs(const uint8_t *Data, size_t Size);

#endif /* CONTRIB_FUZZ_FUZZUTIL_H */