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/* test_small_window.cc - Test deflate() and inflate() with a small window and a preset dictionary */
#include "zbuild.h"
#ifdef ZLIB_COMPAT
# include "zlib.h"
#else
# include "zlib-ng.h"
#endif
#include <gtest/gtest.h>
TEST(small_window, basic) {
PREFIX3(stream) stream;
int err;
unsigned char plain[128];
unsigned char dictionary1[(1 << 9) - sizeof(plain) / 2];
size_t i;
unsigned char compr[sizeof(plain)];
unsigned int compr_len;
unsigned char plain_again[sizeof(plain)];
memset(&stream, 0, sizeof(stream));
err = PREFIX(deflateInit2)(&stream, Z_BEST_COMPRESSION, Z_DEFLATED, -9, 8, Z_DEFAULT_STRATEGY);
EXPECT_EQ(err, Z_OK);
/* Use a large dictionary that is loaded in two parts */
memset(dictionary1, 'a', sizeof(dictionary1));
err = PREFIX(deflateSetDictionary)(&stream, dictionary1, (unsigned int)sizeof(dictionary1));
EXPECT_EQ(err, Z_OK);
for (i = 0; i < sizeof(plain); i++)
plain[i] = (unsigned char)i;
err = PREFIX(deflateSetDictionary)(&stream, plain, (unsigned int)sizeof(plain));
EXPECT_EQ(err, Z_OK);
stream.next_in = plain;
stream.avail_in = (uint32_t)sizeof(plain);
stream.next_out = compr;
stream.avail_out = (uint32_t)sizeof(compr);
err = PREFIX(deflate)(&stream, Z_FINISH);
EXPECT_EQ(err, Z_STREAM_END);
compr_len = sizeof(compr) - stream.avail_out;
err = PREFIX(deflateEnd)(&stream);
EXPECT_EQ(err, Z_OK);
memset(&stream, 0, sizeof(stream));
err = PREFIX(inflateInit2)(&stream, -9);
EXPECT_EQ(err, Z_OK);
err = PREFIX(inflateSetDictionary)(&stream, dictionary1, (unsigned int)sizeof(dictionary1));
EXPECT_EQ(err, Z_OK);
err = PREFIX(inflateSetDictionary)(&stream, plain, (unsigned int)sizeof(plain));
EXPECT_EQ(err, Z_OK);
stream.next_in = compr;
stream.avail_in = compr_len;
stream.next_out = plain_again;
stream.avail_out = (unsigned int)sizeof(plain_again);
err = PREFIX(inflate)(&stream, Z_NO_FLUSH);
EXPECT_EQ(err, Z_STREAM_END);
err = PREFIX(inflateEnd)(&stream);
EXPECT_EQ(err, Z_OK);
EXPECT_TRUE(memcmp(plain_again, plain, sizeof(plain)) == 0);
}
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