87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
/*
|
|
# 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 <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
#include <assert.h>
|
|
#include "lzo1x.h"
|
|
|
|
/* Work-memory needed for compression. Allocate memory in units
|
|
* of 'lzo_align_t' (instead of 'char') to make sure it is properly aligned.
|
|
*/
|
|
#define HEAP_ALLOC(var,size) \
|
|
lzo_align_t __LZO_MMODEL var [ ((size) + (sizeof(lzo_align_t) - 1)) / sizeof(lzo_align_t) ]
|
|
|
|
static HEAP_ALLOC(wrkmem, LZO1X_1_MEM_COMPRESS);
|
|
|
|
extern int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
|
|
{
|
|
int r;
|
|
lzo_uint out_len;
|
|
lzo_uint new_len;
|
|
/* We want to compress the data block at 'in' with length 'IN_LEN' to
|
|
* the block at 'out'. Because the input block may be incompressible,
|
|
* we must provide a little more output space in case that compression
|
|
* is not possible.
|
|
*/
|
|
unsigned char __LZO_MMODEL in[size];
|
|
unsigned char __LZO_MMODEL out[size + size/16 + 64 + 3];
|
|
|
|
static bool isInit = false;
|
|
if (!isInit)
|
|
{
|
|
if (lzo_init() != LZO_E_OK)
|
|
{
|
|
#ifdef __DEBUG__
|
|
printf("internal error - lzo_init() failed !!!\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
isInit = true;
|
|
}
|
|
|
|
/* Compress with LZO1X-1. */
|
|
r = lzo1x_1_compress(data, size, out, &out_len, wrkmem);
|
|
assert(r == LZO_E_OK);
|
|
#ifdef __DEBUG__
|
|
printf("compressed %lu bytes into %lu bytes\n",
|
|
(unsigned long) size, (unsigned long) out_len);
|
|
#endif
|
|
|
|
/* check for an incompressible block */
|
|
if (out_len >= size)
|
|
{
|
|
#ifdef __DEBUG__
|
|
printf("This block contains incompressible data.\n");
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
// Decompress
|
|
new_len = size;
|
|
r = lzo1x_decompress(out, out_len, in, &new_len,/*wrkmem=*/NULL);
|
|
assert(r == LZO_E_OK && new_len == size);
|
|
#ifdef __DEBUG__
|
|
printf("decompressed %lu bytes back into %lu bytes\n",
|
|
(unsigned long) out_len, (unsigned long) size);
|
|
#endif
|
|
return 0;
|
|
}
|