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/* test_deflate_header.cc - Test deflateSetHeader() with small buffers */
#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 <gtest/gtest.h>
#include "test_shared.h"
TEST(deflate, header) {
PREFIX3(stream) c_stream;
PREFIX(gz_header) *head;
uint8_t compr[128];
z_size_t compr_len = sizeof(compr);
int err;
head = (PREFIX(gz_header) *)calloc(1, sizeof(PREFIX(gz_header)));
ASSERT_TRUE(head != NULL);
memset(&c_stream, 0, sizeof(c_stream));
/* gzip */
err = PREFIX(deflateInit2)(&c_stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED, MAX_WBITS + 16, 8, Z_DEFAULT_STRATEGY);
EXPECT_EQ(err, Z_OK);
head->text = 1;
head->comment = (uint8_t *)"comment";
head->name = (uint8_t *)"name";
head->hcrc = 1;
head->extra = (uint8_t *)"extra";
head->extra_len = (uint32_t)strlen((const char *)head->extra);
err = PREFIX(deflateSetHeader)(&c_stream, head);
EXPECT_EQ(err, Z_OK);
PREFIX(deflateBound)(&c_stream, (unsigned long)compr_len);
c_stream.next_in = (unsigned char *)hello;
c_stream.next_out = compr;
while (c_stream.total_in != hello_len && c_stream.total_out < compr_len) {
c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
err = PREFIX(deflate)(&c_stream, Z_NO_FLUSH);
EXPECT_EQ(err, Z_OK);
}
/* Finish the stream, still forcing small buffers: */
for (;;) {
c_stream.avail_out = 1;
err = PREFIX(deflate)(&c_stream, Z_FINISH);
if (err == Z_STREAM_END) break;
EXPECT_EQ(err, Z_OK);
}
/* Check CRC32. */
EXPECT_EQ(c_stream.adler, 0xb56c3f9dU);
err = PREFIX(deflateEnd)(&c_stream);
EXPECT_EQ(err, Z_OK);
free(head);
}
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