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/* test_dict.cc - Test deflate() and inflate() with preset dictionary */
#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>
/* Maximum dictionary size, according to inflateGetDictionary() description. */
#define MAX_DICTIONARY_SIZE 32768
static const char dictionary[] = "hello";
TEST(dictionary, basic) {
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 dict_adler = 0;
uint8_t check_dict[MAX_DICTIONARY_SIZE];
uint32_t check_dict_len = 0;
int err;
memset(&c_stream, 0, sizeof(c_stream));
memset(&d_stream, 0, sizeof(d_stream));
err = PREFIX(deflateInit)(&c_stream, Z_BEST_COMPRESSION);
EXPECT_EQ(err, Z_OK);
err = PREFIX(deflateSetDictionary)(&c_stream,
(const unsigned char *)dictionary, (int)sizeof(dictionary));
EXPECT_EQ(err, Z_OK);
dict_adler = c_stream.adler;
c_stream.next_out = compr;
c_stream.avail_out = (uint32_t)compr_len;
c_stream.next_in = (z_const unsigned char *)hello;
c_stream.avail_in = (uint32_t)hello_len;
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;
strcpy((char*)uncompr, "garbage garbage garbage");
d_stream.next_in = compr;
d_stream.avail_in = (unsigned int)compr_len;
err = PREFIX(inflateInit)(&d_stream);
EXPECT_EQ(err, Z_OK);
d_stream.next_out = uncompr;
d_stream.avail_out = (unsigned int)uncompr_len;
for (;;) {
err = PREFIX(inflate)(&d_stream, Z_NO_FLUSH);
if (err == Z_STREAM_END)
break;
if (err == Z_NEED_DICT) {
EXPECT_EQ(d_stream.adler, dict_adler);
err = PREFIX(inflateSetDictionary)(&d_stream, (const unsigned char*)dictionary,
(uint32_t)sizeof(dictionary));
EXPECT_EQ(d_stream.adler, dict_adler);
}
EXPECT_EQ(err, Z_OK);
}
err = PREFIX(inflateGetDictionary)(&d_stream, NULL, &check_dict_len);
EXPECT_EQ(err, Z_OK);
#ifndef S390_DFLTCC_INFLATE
EXPECT_GE(check_dict_len, sizeof(dictionary));
#endif
err = PREFIX(inflateGetDictionary)(&d_stream, check_dict, &check_dict_len);
EXPECT_EQ(err, Z_OK);
#ifndef S390_DFLTCC_INFLATE
EXPECT_TRUE(memcmp(dictionary, check_dict, sizeof(dictionary)) == 0);
#endif
err = PREFIX(inflateEnd)(&d_stream);
EXPECT_EQ(err, Z_OK);
EXPECT_TRUE(strncmp((char*)uncompr, hello, sizeof(hello)) == 0);
}
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