mirror of
https://github.com/GerbilSoft/zlib-ng.git
synced 2025-06-18 11:35:35 -04:00
100 lines
2.9 KiB
C++
100 lines
2.9 KiB
C++
/* test_deflate_bound.cc - Test deflateBound() with small buffers */
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#include "zbuild.h"
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#ifdef ZLIB_COMPAT
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# include "zlib.h"
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#else
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# include "zlib-ng.h"
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#endif
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <string.h>
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#include <gtest/gtest.h>
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#include "test_shared.h"
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#define MAX_LENGTH (32)
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typedef struct {
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int32_t level;
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int32_t window_size;
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int32_t mem_level;
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bool after_init;
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} deflate_bound_test;
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static const deflate_bound_test tests[] = {
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{0, MAX_WBITS + 16, 1, true},
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{Z_BEST_SPEED, MAX_WBITS, MAX_MEM_LEVEL, true},
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{Z_BEST_COMPRESSION, MAX_WBITS, MAX_MEM_LEVEL, true},
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{Z_BEST_SPEED, MAX_WBITS, MAX_MEM_LEVEL, false},
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{Z_BEST_COMPRESSION, MAX_WBITS, MAX_MEM_LEVEL, false},
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};
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class deflate_bound_variant : public testing::TestWithParam<deflate_bound_test> {
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public:
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void estimate(deflate_bound_test param) {
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PREFIX3(stream) c_stream;
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int estimate_len = 0;
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uint8_t *uncompressed = NULL;
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uint8_t *out_buf = NULL;
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int err;
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uncompressed = (uint8_t *)malloc(MAX_LENGTH);
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ASSERT_TRUE(uncompressed != NULL);
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memset(uncompressed, 'a', MAX_LENGTH);
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for (int32_t i = 0; i < MAX_LENGTH; i++) {
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memset(&c_stream, 0, sizeof(c_stream));
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c_stream.avail_in = i;
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c_stream.next_in = (z_const unsigned char *)uncompressed;
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c_stream.avail_out = 0;
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c_stream.next_out = out_buf;
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if (!param.after_init)
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estimate_len = PREFIX(deflateBound)(&c_stream, i);
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err = PREFIX(deflateInit2)(&c_stream, param.level, Z_DEFLATED,
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param.window_size, param.mem_level, Z_DEFAULT_STRATEGY);
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EXPECT_EQ(err, Z_OK);
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/* calculate actual output length and update structure */
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if (param.after_init)
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estimate_len = PREFIX(deflateBound)(&c_stream, i);
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out_buf = (uint8_t *)malloc(estimate_len);
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if (out_buf != NULL) {
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/* update zlib configuration */
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c_stream.avail_out = estimate_len;
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c_stream.next_out = out_buf;
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/* do the compression */
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err = PREFIX(deflate)(&c_stream, Z_FINISH);
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EXPECT_EQ(err, Z_STREAM_END) <<
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"level: " << param.level << "\n" <<
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"window_size: " << param.window_size << "\n" <<
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"mem_level: " << param.mem_level << "\n" <<
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"after_init: " << param.after_init << "\n" <<
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"length: " << i;
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free(out_buf);
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out_buf = NULL;
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}
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err = PREFIX(deflateEnd)(&c_stream);
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EXPECT_EQ(err, Z_OK);
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}
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free(uncompressed);
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}
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};
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TEST_P(deflate_bound_variant, estimate) {
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estimate(GetParam());
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}
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INSTANTIATE_TEST_SUITE_P(deflate_bound, deflate_bound_variant, testing::ValuesIn(tests));
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