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/* test_deflate_prime.cc - Test deflatePrime() wrapping gzip around deflate stream */
#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_ng.h"
#include <gtest/gtest.h>
TEST(deflate, prime) {
PREFIX3(stream) c_stream, d_stream;
uint8_t compr[128], uncompr[128];
z_size_t compr_len = sizeof(compr), uncompr_len = sizeof(uncompr);
uint32_t crc = 0;
int err;
memset(&c_stream, 0, sizeof(c_stream));
memset(&d_stream, 0, sizeof(d_stream));
/* Raw deflate windowBits is -15 */
err = PREFIX(deflateInit2)(&c_stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, -MAX_WBITS, 8, Z_DEFAULT_STRATEGY);
EXPECT_EQ(err, Z_OK);
/* Gzip magic number */
err = PREFIX(deflatePrime)(&c_stream, 16, 0x8b1f);
EXPECT_EQ(err, Z_OK);
/* Gzip compression method (deflate) */
err = PREFIX(deflatePrime)(&c_stream, 8, 0x08);
EXPECT_EQ(err, Z_OK);
/* Gzip flags (one byte, using two odd bit calls) */
err = PREFIX(deflatePrime)(&c_stream, 3, 0x0);
EXPECT_EQ(err, Z_OK);
err = PREFIX(deflatePrime)(&c_stream, 5, 0x0);
EXPECT_EQ(err, Z_OK);
/* Gzip modified time */
err = deflate_prime_32(&c_stream, 0x0);
EXPECT_EQ(err, Z_OK);
/* Gzip extra flags */
err = PREFIX(deflatePrime)(&c_stream, 8, 0x0);
EXPECT_EQ(err, Z_OK);
/* Gzip operating system */
err = PREFIX(deflatePrime)(&c_stream, 8, 255);
EXPECT_EQ(err, Z_OK);
c_stream.next_in = (z_const unsigned char *)hello;
c_stream.avail_in = (uint32_t)hello_len;
c_stream.next_out = compr;
c_stream.avail_out = (uint32_t)compr_len;
err = PREFIX(deflate)(&c_stream, Z_FINISH);
EXPECT_EQ(err, Z_STREAM_END);
/* Gzip uncompressed data crc32 */
crc = PREFIX(crc32)(0, (const uint8_t *)hello, (uint32_t)hello_len);
err = deflate_prime_32(&c_stream, crc);
EXPECT_EQ(err, Z_OK);
/* Gzip uncompressed data length */
err = deflate_prime_32(&c_stream, (uint32_t)hello_len);
EXPECT_EQ(err, Z_OK);
err = PREFIX(deflateEnd)(&c_stream);
EXPECT_EQ(err, Z_OK);
d_stream.next_in = compr;
d_stream.avail_in = (uint32_t)c_stream.total_out;
d_stream.next_out = uncompr;
d_stream.avail_out = (uint32_t)uncompr_len;
d_stream.total_in = 0;
d_stream.total_out = 0;
/* Inflate with gzip header */
err = PREFIX(inflateInit2)(&d_stream, MAX_WBITS + 32);
EXPECT_EQ(err, Z_OK);
err = PREFIX(inflate)(&d_stream, Z_FINISH);
EXPECT_EQ(err, Z_BUF_ERROR);
err = PREFIX(inflateEnd)(&d_stream);
EXPECT_EQ(err, Z_OK);
EXPECT_STREQ((char *)uncompr, hello);
}
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