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/* test_small_buffers.cc - Test deflate() and inflate() 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 "test_shared.h"
#include <gtest/gtest.h>
TEST(deflate, small_buffers) {
PREFIX3(stream) c_stream, d_stream;
uint8_t compr[128], uncompr[128];
z_size_t compr_len = sizeof(compr), uncompr_len = sizeof(uncompr);
int err;
memset(&c_stream, 0, sizeof(c_stream));
memset(&d_stream, 0, sizeof(d_stream));
err = PREFIX(deflateInit)(&c_stream, Z_DEFAULT_COMPRESSION);
EXPECT_EQ(err, Z_OK);
c_stream.next_in = (z_const 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);
}
err = PREFIX(deflateEnd)(&c_stream);
EXPECT_EQ(err, Z_OK);
strcpy((char*)uncompr, "garbage");
d_stream.next_in = compr;
d_stream.next_out = uncompr;
err = PREFIX(inflateInit)(&d_stream);
EXPECT_EQ(err, Z_OK);
while (d_stream.total_out < uncompr_len && d_stream.total_in < compr_len) {
d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
err = PREFIX(inflate)(&d_stream, Z_NO_FLUSH);
if (err == Z_STREAM_END) break;
EXPECT_EQ(err, Z_OK);
}
err = PREFIX(inflateEnd)(&d_stream);
EXPECT_EQ(err, Z_OK);
EXPECT_STREQ((char*)uncompr, hello);
}
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