File size: 5,942 Bytes
e996a55 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 | #include "unity/unity.h"
#include "zlib.h"
#include "deflate.h" /* Needed for deflate_state, MIN_MATCH, etc. */
#include <string.h>
#include <stdint.h>
/* Wrapper provided in deflate.c for testing local function lm_init */
extern void test_lm_init(deflate_state *s);
void setUp(void) {
/* Setup code here, or leave empty */
}
void tearDown(void) {
/* Cleanup code here, or leave empty */
}
/* Helper to initialize a z_stream and return its internal deflate_state* */
static int init_stream_get_state(z_stream *strm, int level, deflate_state **out_s) {
memset(strm, 0, sizeof(*strm));
/* Use common parameters to ensure allocations happen */
int ret = deflateInit2(strm, level, Z_DEFLATED, 15, 8, Z_DEFAULT_STRATEGY);
if (ret != Z_OK) return ret;
*out_s = (deflate_state *)strm->state;
return Z_OK;
}
void test_lm_init_resets_state_fields_and_clears_hash(void) {
z_stream strm;
deflate_state *s = NULL;
int ret = init_stream_get_state(&strm, 6, &s);
TEST_ASSERT_EQUAL_INT(Z_OK, ret);
TEST_ASSERT_NOT_NULL(s);
TEST_ASSERT_NOT_EQUAL(0u, s->hash_size);
TEST_ASSERT_NOT_NULL(s->head);
/* Corrupt/alter fields to verify they are reset */
s->window_size = 0;
s->strstart = 12345;
s->block_start = 999L;
s->lookahead = 77;
s->insert = 33;
s->match_length = 42;
s->prev_length = 17;
s->match_available = 1;
s->ins_h = 99;
/* Make sure hash head table is non-zero everywhere */
for (uInt i = 0; i < s->hash_size; i++) {
s->head[i] = 1;
}
/* Call the wrapper to test lm_init */
test_lm_init(s);
/* window_size is set to 2 * w_size */
TEST_ASSERT_EQUAL_UINT64((uint64_t)s->w_size * 2u, (uint64_t)s->window_size);
/* Core fields are reset */
TEST_ASSERT_EQUAL_UINT32(0u, s->strstart);
TEST_ASSERT_EQUAL_INT32(0L, s->block_start);
TEST_ASSERT_EQUAL_UINT32(0u, s->lookahead);
TEST_ASSERT_EQUAL_UINT32(0u, s->insert);
TEST_ASSERT_EQUAL_UINT32((unsigned)(MIN_MATCH - 1), s->match_length);
TEST_ASSERT_EQUAL_UINT32((unsigned)(MIN_MATCH - 1), s->prev_length);
TEST_ASSERT_EQUAL_UINT32(0u, s->match_available);
TEST_ASSERT_EQUAL_UINT32(0u, s->ins_h);
/* Hash head table cleared to NIL (0) */
unsigned nonzero = 0;
for (uInt i = 0; i < s->hash_size; i++) {
if (s->head[i] != 0) {
nonzero++;
break; /* Early exit on first failure to reduce runtime */
}
}
TEST_ASSERT_EQUAL_UINT(0u, nonzero);
/* Cleanup */
TEST_ASSERT_EQUAL_INT(Z_OK, deflateEnd(&strm));
}
void test_lm_init_config_level0(void) {
z_stream strm;
deflate_state *s = NULL;
int ret = init_stream_get_state(&strm, 0, &s);
TEST_ASSERT_EQUAL_INT(Z_OK, ret);
TEST_ASSERT_NOT_NULL(s);
/* Set the desired level and poison config fields */
s->level = 0;
s->good_match = 1234;
s->max_lazy_match = 4321;
s->nice_match = 555;
s->max_chain_length = 777;
test_lm_init(s);
/* From configuration_table[0]: {0,0,0,0,...} */
TEST_ASSERT_EQUAL_UINT(0u, s->good_match);
TEST_ASSERT_EQUAL_UINT(0u, s->max_lazy_match);
TEST_ASSERT_EQUAL_UINT(0u, s->nice_match);
TEST_ASSERT_EQUAL_UINT(0u, s->max_chain_length);
TEST_ASSERT_EQUAL_INT(Z_OK, deflateEnd(&strm));
}
void test_lm_init_config_level1(void) {
z_stream strm;
deflate_state *s = NULL;
int ret = init_stream_get_state(&strm, 1, &s);
TEST_ASSERT_EQUAL_INT(Z_OK, ret);
TEST_ASSERT_NOT_NULL(s);
s->level = 1;
s->good_match = 0;
s->max_lazy_match = 0;
s->nice_match = 0;
s->max_chain_length = 0;
test_lm_init(s);
#ifdef FASTEST
/* FASTEST configuration_table[1]: {4,4,8,4} */
TEST_ASSERT_EQUAL_UINT(4u, s->good_match);
TEST_ASSERT_EQUAL_UINT(4u, s->max_lazy_match);
TEST_ASSERT_EQUAL_UINT(8u, s->nice_match);
TEST_ASSERT_EQUAL_UINT(4u, s->max_chain_length);
#else
/* Non-FASTEST configuration_table[1]: {4,4,8,4} as well */
TEST_ASSERT_EQUAL_UINT(4u, s->good_match);
TEST_ASSERT_EQUAL_UINT(4u, s->max_lazy_match);
TEST_ASSERT_EQUAL_UINT(8u, s->nice_match);
TEST_ASSERT_EQUAL_UINT(4u, s->max_chain_length);
#endif
TEST_ASSERT_EQUAL_INT(Z_OK, deflateEnd(&strm));
}
#ifndef FASTEST
void test_lm_init_config_level6(void) {
z_stream strm;
deflate_state *s = NULL;
int ret = init_stream_get_state(&strm, 6, &s);
TEST_ASSERT_EQUAL_INT(Z_OK, ret);
TEST_ASSERT_NOT_NULL(s);
s->level = 6;
s->good_match = 0;
s->max_lazy_match = 0;
s->nice_match = 0;
s->max_chain_length = 0;
test_lm_init(s);
/* configuration_table[6]: {8, 16, 128, 128} */
TEST_ASSERT_EQUAL_UINT(8u, s->good_match);
TEST_ASSERT_EQUAL_UINT(16u, s->max_lazy_match);
TEST_ASSERT_EQUAL_UINT(128u, s->nice_match);
TEST_ASSERT_EQUAL_UINT(128u, s->max_chain_length);
TEST_ASSERT_EQUAL_INT(Z_OK, deflateEnd(&strm));
}
void test_lm_init_config_level9(void) {
z_stream strm;
deflate_state *s = NULL;
int ret = init_stream_get_state(&strm, 9, &s);
TEST_ASSERT_EQUAL_INT(Z_OK, ret);
TEST_ASSERT_NOT_NULL(s);
s->level = 9;
s->good_match = 0;
s->max_lazy_match = 0;
s->nice_match = 0;
s->max_chain_length = 0;
test_lm_init(s);
/* configuration_table[9]: {32, 258, 258, 4096} */
TEST_ASSERT_EQUAL_UINT(32u, s->good_match);
TEST_ASSERT_EQUAL_UINT(258u, s->max_lazy_match);
TEST_ASSERT_EQUAL_UINT(258u, s->nice_match);
TEST_ASSERT_EQUAL_UINT(4096u, s->max_chain_length);
TEST_ASSERT_EQUAL_INT(Z_OK, deflateEnd(&strm));
}
#endif /* !FASTEST */
int main(void) {
UNITY_BEGIN();
RUN_TEST(test_lm_init_resets_state_fields_and_clears_hash);
RUN_TEST(test_lm_init_config_level0);
RUN_TEST(test_lm_init_config_level1);
#ifndef FASTEST
RUN_TEST(test_lm_init_config_level6);
RUN_TEST(test_lm_init_config_level9);
#endif
return UNITY_END();
} |