| /* 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); |
| |
| 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); |
| } |