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/* test_inflate_sync.cc - Test inflateSync using full flush deflate and corrupted data */
#include "zbuild.h"
#ifdef ZLIB_COMPAT
# include "zlib.h"
#else
# include "zlib-ng.h"
#endif
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include "test_shared.h"
#include <gtest/gtest.h>
TEST(inflate, sync) {
PREFIX3(stream) c_stream, d_stream;
uint8_t compr[128], uncompr[128];
z_size_t compr_len = sizeof(compr), uncompr_len = sizeof(uncompr);
int err;
memset(&c_stream, 0, sizeof(c_stream));
/* build compressed stream with full flush */
err = PREFIX(deflateInit)(&c_stream, Z_DEFAULT_COMPRESSION);
EXPECT_EQ(err, Z_OK);
c_stream.next_in = (z_const unsigned char *)hello;
c_stream.next_out = compr;
c_stream.avail_in = 3;
c_stream.avail_out = (uint32_t)compr_len;
err = PREFIX(deflate)(&c_stream, Z_FULL_FLUSH);
EXPECT_EQ(err, Z_OK);
/* force an error in first compressed block */
compr[3]++;
c_stream.avail_in = hello_len-3;
err = PREFIX(deflate)(&c_stream, Z_FINISH);
EXPECT_EQ(err, Z_STREAM_END);
err = PREFIX(deflateEnd)(&c_stream);
EXPECT_EQ(err, Z_OK);
compr_len = (z_size_t)c_stream.total_out;
memset(&d_stream, 0, sizeof(d_stream));
/* just read the zlib header */
d_stream.next_in = compr;
d_stream.avail_in = 2;
err = PREFIX(inflateInit)(&d_stream);
EXPECT_EQ(err, Z_OK);
d_stream.next_out = uncompr;
d_stream.avail_out = (uint32_t)uncompr_len;
err = PREFIX(inflate)(&d_stream, Z_NO_FLUSH);
EXPECT_EQ(err, Z_OK);
/* read all compressed data, but skip damaged part */
d_stream.avail_in = (uint32_t)compr_len-2;
err = PREFIX(inflateSync)(&d_stream);
EXPECT_EQ(err, Z_OK);
err = PREFIX(inflate)(&d_stream, Z_FINISH);
EXPECT_EQ(err, Z_STREAM_END);
err = PREFIX(inflateEnd)(&d_stream);
EXPECT_EQ(err, Z_OK);
}
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