/*

# Copyright 2018 Google Inc.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

#      http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#

###############################################################################

*/

#include "bzlib.h"

#include <stdint.h>

#include <stdlib.h>

#include <assert.h>

#include <string.h>

#include <limits.h>

extern int BZ2_bzBuffToBuffDecompress(char* dest,

                                      unsigned int* destLen,

                                      char*         source,

                                      unsigned int  sourceLen,

                                      int           small,

                                      int           verbosity);

int

LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)

{

    int r, small;

    unsigned int nOut;

    // Reject inputs that would cause integer overflow in size*2

    // since nOut is unsigned int and the API uses unsigned int for sizes

    if (size > UINT_MAX / 2) {

        return 0;

    }

    // See: https://github.com/google/bzip2-rpc/blob/master/unzcrash.c#L39

    nOut = (unsigned int)(size * 2);

    char *outbuf = malloc(nOut);

    if (!outbuf) {

        return 0;

    }

    small = size % 2;

    r = BZ2_bzBuffToBuffDecompress(outbuf, &nOut, (char *)data, (unsigned int)size,

            small, /*verbosity=*/0);

    if (r != BZ_OK) {

#ifdef __DEBUG__

        fprintf(stdout, "Decompression error: %d\n", r);

#endif

    }

    free(outbuf);

    return 0;

}