| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* GATE PROJECT LICENSE: | ||
| 2 | +----------------------------------------------------------------------------+ | ||
| 3 | | Copyright(c) 2018-2025, Stefan Meislinger <sm@opengate.at> | | ||
| 4 | | All rights reserved. | | ||
| 5 | | | | ||
| 6 | | Redistribution and use in source and binary forms, with or without | | ||
| 7 | | modification, are permitted provided that the following conditions are met:| | ||
| 8 | | | | ||
| 9 | | 1. Redistributions of source code must retain the above copyright notice, | | ||
| 10 | | this list of conditions and the following disclaimer. | | ||
| 11 | | 2. Redistributions in binary form must reproduce the above copyright | | ||
| 12 | | notice, this list of conditions and the following disclaimer in the | | ||
| 13 | | documentation and/or other materials provided with the distribution. | | ||
| 14 | | | | ||
| 15 | | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"| | ||
| 16 | | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | | ||
| 17 | | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | | ||
| 18 | | ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | | ||
| 19 | | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | | ||
| 20 | | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | | ||
| 21 | | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | | ||
| 22 | | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | | ||
| 23 | | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | | ||
| 24 | | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF | | ||
| 25 | | THE POSSIBILITY OF SUCH DAMAGE. | | ||
| 26 | +----------------------------------------------------------------------------+ | ||
| 27 | */ | ||
| 28 | |||
| 29 | #include "gate/encode/zlibstreams.h" | ||
| 30 | #include "gate/memalloc.h" | ||
| 31 | #include "gate/atomics.h" | ||
| 32 | #include "gate/results.h" | ||
| 33 | #include "gate/debugging.h" | ||
| 34 | |||
| 35 | #if defined(GATE_EXTLIB_ZLIB) | ||
| 36 | # define GATE_ENCODE_ZLIBSTREAM_USE_ZLIB 1 | ||
| 37 | #else | ||
| 38 | # define GATE_ENCODE_ZLIBSTREAM_NO_IMPL 1 | ||
| 39 | #endif | ||
| 40 | |||
| 41 | #if defined(GATE_ENCODE_ZLIBSTREAM_USE_ZLIB) | ||
| 42 | |||
| 43 | #include "zlib.h" | ||
| 44 | |||
| 45 | /* output stream encoder implementation */ | ||
| 46 | |||
| 47 | 12 | static voidpf gate_zlibstream_alloc_func(voidpf opaque, uInt items, uInt size) | |
| 48 | { | ||
| 49 | voidpf ret; | ||
| 50 | 12 | gate_size_t const mem_sz = (gate_size_t)items * (gate_size_t)size; | |
| 51 | (void)opaque; | ||
| 52 | |||
| 53 | 12 | ret = gate_mem_alloc(mem_sz); | |
| 54 |
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12 | if (!ret) |
| 55 | { | ||
| 56 | ✗ | GATE_DEBUG_TRACE("ZLIB allocation failed"); | |
| 57 | } | ||
| 58 | else | ||
| 59 | { | ||
| 60 | 12 | gate_mem_clear(ret, mem_sz); | |
| 61 | } | ||
| 62 | 12 | return ret; | |
| 63 | } | ||
| 64 | 12 | static void gate_zlibstream_free_func(voidpf opaque, voidpf address) | |
| 65 | { | ||
| 66 | (void)opaque; | ||
| 67 |
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12 | if (address) |
| 68 | { | ||
| 69 | 12 | gate_mem_dealloc(address); | |
| 70 | } | ||
| 71 | 12 | } | |
| 72 | |||
| 73 | static void gate_zlibencoder_release_impl(void* self); | ||
| 74 | static int gate_zlibencoder_retain_impl(void* self); | ||
| 75 | ✗ | static char const* gate_zlibencoder_interface_name_impl(void* self) | |
| 76 | { | ||
| 77 | (void)self; | ||
| 78 | ✗ | return GATE_INTERFACE_NAME_STREAM; | |
| 79 | } | ||
| 80 | static gate_result_t gate_zlibencoder_read_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned); | ||
| 81 | static gate_result_t gate_zlibencoder_peek_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned); | ||
| 82 | static gate_result_t gate_zlibencoder_write_impl(void* self, char const* buffer, gate_size_t bufferlength, gate_size_t* written); | ||
| 83 | static gate_result_t gate_zlibencoder_flush_impl(void* self); | ||
| 84 | |||
| 85 | static GATE_INTERFACE_VTBL(gate_stream) gate_zlibencoder_vtbl; | ||
| 86 | 2 | static void gate_init_zlibencoder_vtbl() | |
| 87 | { | ||
| 88 |
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2 | if (!gate_zlibencoder_vtbl.get_interface_name) |
| 89 | { | ||
| 90 | GATE_INTERFACE_VTBL(gate_stream) const local_vtbl = | ||
| 91 | { | ||
| 92 | &gate_zlibencoder_interface_name_impl, | ||
| 93 | &gate_zlibencoder_release_impl, | ||
| 94 | &gate_zlibencoder_retain_impl, | ||
| 95 | &gate_zlibencoder_read_impl, | ||
| 96 | &gate_zlibencoder_peek_impl, | ||
| 97 | &gate_zlibencoder_write_impl, | ||
| 98 | &gate_zlibencoder_flush_impl | ||
| 99 | }; | ||
| 100 | 1 | gate_zlibencoder_vtbl = local_vtbl; | |
| 101 | } | ||
| 102 | 2 | } | |
| 103 | |||
| 104 | typedef struct gate_zlibencoder_impl | ||
| 105 | { | ||
| 106 | GATE_INTERFACE_VTBL(gate_stream)* vtbl; | ||
| 107 | |||
| 108 | gate_atomic_int_t ref_counter; | ||
| 109 | gate_stream_t* dest_stream; | ||
| 110 | z_stream zipper; | ||
| 111 | char data_buffer[GATE_MAX_BLOCK_COPYBUFFER_LENGTH]; | ||
| 112 | gate_size_t data_buffer_used; | ||
| 113 | |||
| 114 | } gate_zlibencoder_impl_t; | ||
| 115 | |||
| 116 | 2 | gate_result_t gate_zlib_encoder_create(gate_stream_t* output, gate_bool_t gzformat, gate_int16_t compression, gate_stream_t** ptr2streamptr) | |
| 117 | { | ||
| 118 | gate_result_t ret; | ||
| 119 | gate_zlibencoder_impl_t* impl; | ||
| 120 | int zresult; | ||
| 121 | 2 | int level = Z_DEFAULT_COMPRESSION; | |
| 122 | #if defined(GATE_SYS_WINCE) || defined(GATE_SYS_DOS) | ||
| 123 | int memlevel = MAX_MEM_LEVEL - 2; | ||
| 124 | int window_bits = MAX_WBITS - 1; | ||
| 125 | #else | ||
| 126 | 2 | int memlevel = MAX_MEM_LEVEL; | |
| 127 | 2 | int window_bits = MAX_WBITS; | |
| 128 | #endif | ||
| 129 | do | ||
| 130 | { | ||
| 131 |
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2 | if ((output == NULL) || (ptr2streamptr == NULL)) |
| 132 | { | ||
| 133 | ✗ | GATE_DEBUG_TRACE("ZLIB encoder NULL pointer"); | |
| 134 | ✗ | ret = GATE_RESULT_NULLPOINTER; | |
| 135 | ✗ | break; | |
| 136 | } | ||
| 137 | 2 | impl = (gate_zlibencoder_impl_t*)gate_mem_alloc(sizeof(gate_zlibencoder_impl_t)); | |
| 138 |
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2 | if (impl == NULL) |
| 139 | { | ||
| 140 | ✗ | GATE_DEBUG_TRACE("Failed to allocate ZLIB encoder"); | |
| 141 | ✗ | ret = GATE_RESULT_OUTOFMEMORY; | |
| 142 | ✗ | break; | |
| 143 | } | ||
| 144 | |||
| 145 | 2 | gate_mem_clear(impl, sizeof(gate_zlibencoder_impl_t)); | |
| 146 | 2 | gate_init_zlibencoder_vtbl(); | |
| 147 | 2 | impl->vtbl = &gate_zlibencoder_vtbl; | |
| 148 | 2 | gate_atomic_int_init(&impl->ref_counter, 1); | |
| 149 | 2 | impl->dest_stream = output; | |
| 150 | |||
| 151 |
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2 | switch (compression) |
| 152 | { | ||
| 153 | ✗ | case GATE_ZLIB_COMPRESSION_MINIMUM: level = Z_BEST_SPEED; break; | |
| 154 | ✗ | case GATE_ZLIB_COMPRESSION_LOW: level = (Z_BEST_SPEED + (Z_BEST_SPEED + Z_BEST_COMPRESSION) / 2) / 2; break; | |
| 155 | ✗ | case GATE_ZLIB_COMPRESSION_MEDIUM: level = (Z_BEST_SPEED + Z_BEST_COMPRESSION) / 2; break; | |
| 156 | ✗ | case GATE_ZLIB_COMPRESSION_HIGH: level = (Z_BEST_COMPRESSION + (Z_BEST_SPEED + Z_BEST_COMPRESSION) / 2) / 2; break; | |
| 157 | ✗ | case GATE_ZLIB_COMPRESSION_MAXIMUM: level = Z_BEST_COMPRESSION; break; | |
| 158 | } | ||
| 159 |
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2 | if (gzformat) |
| 160 | { | ||
| 161 | 1 | window_bits += 16; | |
| 162 | } | ||
| 163 | |||
| 164 | 2 | impl->zipper.zalloc = &gate_zlibstream_alloc_func; | |
| 165 | 2 | impl->zipper.opaque = Z_NULL; | |
| 166 | 2 | impl->zipper.zfree = &gate_zlibstream_free_func; | |
| 167 | |||
| 168 | 2 | zresult = deflateInit2(&impl->zipper, level, Z_DEFLATED, window_bits, memlevel, Z_DEFAULT_STRATEGY); | |
| 169 |
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2 | if (zresult != Z_OK) |
| 170 | { | ||
| 171 | ✗ | GATE_DEBUG_TRACE_MSG_VALUE("deflateInit2() failed", zresult); | |
| 172 | ✗ | gate_mem_dealloc(impl); | |
| 173 | ✗ | ret = GATE_RESULT_FAILED; | |
| 174 | ✗ | break; | |
| 175 | } | ||
| 176 | |||
| 177 | 2 | impl->data_buffer_used = 0; | |
| 178 | |||
| 179 | 2 | gate_object_retain(impl->dest_stream); | |
| 180 | 2 | *ptr2streamptr = (gate_stream_t*)impl; | |
| 181 | |||
| 182 | 2 | ret = GATE_RESULT_OK; | |
| 183 | } while (0); | ||
| 184 | |||
| 185 | 2 | return ret; | |
| 186 | |||
| 187 | } | ||
| 188 | |||
| 189 | 2 | static void gate_zlibencoder_release_impl(void* self) | |
| 190 | { | ||
| 191 | 2 | gate_zlibencoder_impl_t* impl = (gate_zlibencoder_impl_t*)self; | |
| 192 |
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2 | if (gate_atomic_int_dec(&impl->ref_counter) == 0) |
| 193 | { | ||
| 194 | 2 | gate_zlibencoder_flush_impl(self); | |
| 195 | 2 | deflateEnd(&impl->zipper); | |
| 196 | 2 | gate_object_release(impl->dest_stream); | |
| 197 | 2 | gate_mem_dealloc(impl); | |
| 198 | } | ||
| 199 | 2 | } | |
| 200 | ✗ | static int gate_zlibencoder_retain_impl(void* self) | |
| 201 | { | ||
| 202 | ✗ | gate_zlibencoder_impl_t* impl = (gate_zlibencoder_impl_t*)self; | |
| 203 | ✗ | return gate_atomic_int_inc(&impl->ref_counter); | |
| 204 | } | ||
| 205 | ✗ | static gate_result_t gate_zlibencoder_read_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned) | |
| 206 | { | ||
| 207 | (void)self; | ||
| 208 | (void)buffer; | ||
| 209 | (void)bufferlength; | ||
| 210 | (void)returned; | ||
| 211 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 212 | } | ||
| 213 | ✗ | static gate_result_t gate_zlibencoder_peek_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned) | |
| 214 | { | ||
| 215 | (void)self; | ||
| 216 | (void)buffer; | ||
| 217 | (void)bufferlength; | ||
| 218 | (void)returned; | ||
| 219 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 220 | } | ||
| 221 | 20 | static gate_result_t gate_zlibencoder_write_impl(void* self, char const* buffer, gate_size_t bufferlength, gate_size_t* written) | |
| 222 | { | ||
| 223 | 20 | gate_result_t ret = GATE_RESULT_OK; | |
| 224 | 20 | gate_zlibencoder_impl_t* impl = (gate_zlibencoder_impl_t*)self; | |
| 225 | char compressed_buffer[GATE_MAX_STACK_COPYBUFFER_LENGTH]; | ||
| 226 | 20 | gate_size_t bytesavailable = sizeof(impl->data_buffer) - impl->data_buffer_used; | |
| 227 | 20 | gate_size_t bytesaccepted = bytesavailable < bufferlength ? bytesavailable : bufferlength; | |
| 228 | int zresult; | ||
| 229 | gate_size_t bytescompressed; | ||
| 230 | gate_size_t byteswritten; | ||
| 231 | gate_size_t bytesremaining; | ||
| 232 | |||
| 233 | do | ||
| 234 | { | ||
| 235 | 20 | gate_mem_copy(&impl->data_buffer[impl->data_buffer_used], buffer, bytesaccepted); | |
| 236 |
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20 | if (written != NULL) |
| 237 | { | ||
| 238 | 20 | *written = bytesaccepted; | |
| 239 | } | ||
| 240 | 20 | impl->data_buffer_used += bytesaccepted; | |
| 241 | |||
| 242 |
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20 | if (impl->data_buffer_used == 0) |
| 243 | { | ||
| 244 | ✗ | GATE_DEBUG_TRACE("zlibencoder_write data_buffer_used==0"); | |
| 245 | ✗ | ret = GATE_RESULT_INVALIDARG; | |
| 246 | ✗ | break; | |
| 247 | } | ||
| 248 | |||
| 249 | 20 | impl->zipper.avail_in = (uInt)impl->data_buffer_used; | |
| 250 | 20 | impl->zipper.next_in = (Bytef*)&impl->data_buffer[0]; | |
| 251 | |||
| 252 |
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22 | while (impl->zipper.avail_in != 0) |
| 253 | { | ||
| 254 | 20 | impl->zipper.avail_out = sizeof(compressed_buffer); | |
| 255 | 20 | impl->zipper.next_out = (Bytef*)&compressed_buffer[0]; | |
| 256 | |||
| 257 | 20 | zresult = deflate(&impl->zipper, Z_NO_FLUSH); | |
| 258 |
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20 | if ((zresult != Z_OK) && (zresult != Z_STREAM_END)) |
| 259 | { | ||
| 260 | ✗ | GATE_DEBUG_TRACE_MSG_VALUE("deflate() failed", zresult); | |
| 261 | ✗ | ret = GATE_RESULT_FAILED; | |
| 262 | ✗ | break; | |
| 263 | } | ||
| 264 | 20 | bytescompressed = sizeof(compressed_buffer) - impl->zipper.avail_out; | |
| 265 |
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20 | if (bytescompressed > 0) |
| 266 | { | ||
| 267 | 2 | ret = gate_stream_write_block(impl->dest_stream, &compressed_buffer[0], bytescompressed, &byteswritten); | |
| 268 |
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2 | if (GATE_FAILED(ret)) |
| 269 | { | ||
| 270 | ✗ | GATE_DEBUG_TRACE_MSG_VALUE("zlib_encoder_write write_block failed", ret); | |
| 271 | ✗ | break; | |
| 272 | } | ||
| 273 | } | ||
| 274 | else | ||
| 275 | { | ||
| 276 | 18 | break; | |
| 277 | } | ||
| 278 | } | ||
| 279 | |||
| 280 |
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20 | if (impl->zipper.avail_in != 0) |
| 281 | { | ||
| 282 | ✗ | bytesremaining = impl->zipper.avail_in; | |
| 283 | ✗ | gate_mem_move(&impl->data_buffer[0], &impl->data_buffer[impl->data_buffer_used - bytesremaining], bytesremaining); | |
| 284 | ✗ | impl->data_buffer_used = bytesremaining; | |
| 285 | } | ||
| 286 | else | ||
| 287 | { | ||
| 288 | 20 | impl->data_buffer_used = 0; | |
| 289 | } | ||
| 290 | } while (0); | ||
| 291 | 20 | return ret; | |
| 292 | } | ||
| 293 | 4 | static gate_result_t gate_zlibencoder_flush_impl(void* self) | |
| 294 | { | ||
| 295 | 4 | gate_result_t ret = GATE_RESULT_OK; | |
| 296 | 4 | gate_zlibencoder_impl_t* impl = (gate_zlibencoder_impl_t*)self; | |
| 297 | char compressed_buffer[GATE_MAX_STACK_COPYBUFFER_LENGTH]; | ||
| 298 | int zresult; | ||
| 299 | gate_size_t bytescompressed; | ||
| 300 | gate_size_t byteswritten; | ||
| 301 | gate_size_t bytesoffset; | ||
| 302 | |||
| 303 | do | ||
| 304 | { | ||
| 305 | 4 | impl->zipper.next_in = (Bytef*)&impl->data_buffer[0]; | |
| 306 | 4 | impl->zipper.avail_in = (uInt)impl->data_buffer_used; | |
| 307 | |||
| 308 | 4 | impl->zipper.avail_out = sizeof(compressed_buffer); | |
| 309 | 4 | impl->zipper.next_out = (Bytef*)&compressed_buffer[0]; | |
| 310 | |||
| 311 | 4 | zresult = deflate(&impl->zipper, Z_FINISH); | |
| 312 |
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4 | if ((zresult != Z_OK) && (zresult != Z_STREAM_END)) |
| 313 | { | ||
| 314 | ✗ | GATE_DEBUG_TRACE_MSG_VALUE("deflate(FINISH) failed", zresult); | |
| 315 | ✗ | ret = GATE_RESULT_FAILED; | |
| 316 | ✗ | break; | |
| 317 | } | ||
| 318 | |||
| 319 | 4 | bytescompressed = sizeof(compressed_buffer) - impl->zipper.avail_out; | |
| 320 | 4 | ret = gate_stream_write_block(impl->dest_stream, compressed_buffer, bytescompressed, &byteswritten); | |
| 321 |
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4 | if (GATE_FAILED(ret)) |
| 322 | { | ||
| 323 | ✗ | GATE_DEBUG_TRACE_MSG_VALUE("zlibencoder_flush write_block failed", ret); | |
| 324 | ✗ | break; | |
| 325 | } | ||
| 326 | |||
| 327 |
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4 | if (impl->zipper.avail_in < impl->data_buffer_used) |
| 328 | { | ||
| 329 | ✗ | bytesoffset = impl->data_buffer_used - impl->zipper.avail_in; | |
| 330 | ✗ | gate_mem_move(&impl->data_buffer[0], &impl->data_buffer[bytesoffset], impl->zipper.avail_in); | |
| 331 | ✗ | impl->data_buffer_used = impl->zipper.avail_in; | |
| 332 | } | ||
| 333 |
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4 | } while (impl->zipper.avail_out == 0); |
| 334 |
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4 | if (GATE_SUCCEEDED(ret)) |
| 335 | { | ||
| 336 | 4 | ret = gate_stream_flush(impl->dest_stream); | |
| 337 | } | ||
| 338 | 4 | return ret; | |
| 339 | } | ||
| 340 | |||
| 341 | |||
| 342 | |||
| 343 | |||
| 344 | /* input stream decoder implementation */ | ||
| 345 | |||
| 346 | static void gate_zlibdecoder_release_impl(void* self); | ||
| 347 | static int gate_zlibdecoder_retain_impl(void* self); | ||
| 348 | static char const* gate_zlibdecoder_interface_name_impl(void* self); | ||
| 349 | |||
| 350 | static gate_result_t gate_zlibdecoder_read_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned); | ||
| 351 | static gate_result_t gate_zlibdecoder_peek_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned); | ||
| 352 | static gate_result_t gate_zlibdecoder_write_impl(void* self, char const* buffer, gate_size_t bufferlength, gate_size_t* written); | ||
| 353 | static gate_result_t gate_zlibdecoder_flush_impl(void* self); | ||
| 354 | |||
| 355 | static gate_result_t gate_zlibdecoder_get_resource_impl(void* self, gate_enumint_t resource_type, gate_uintptr_t* resource); | ||
| 356 | |||
| 357 | static gate_result_t gate_zlibdecoder_can_read_impl(void* self, gate_bool_t* return_value); | ||
| 358 | static gate_result_t gate_zlibdecoder_can_write_impl(void* self, gate_bool_t* return_value); | ||
| 359 | static gate_result_t gate_zlibdecoder_get_size_impl(void* self, gate_int64_t* return_value); | ||
| 360 | static gate_result_t gate_zlibdecoder_get_available_impl(void* self, gate_int64_t* return_value); | ||
| 361 | static gate_result_t gate_zlibdecoder_seek_impl(void* self, gate_int64_t position, gate_enumint_t origin, gate_int64_t* final_position); | ||
| 362 | static gate_result_t gate_zlibdecoder_reset_impl(void* self); | ||
| 363 | static gate_result_t gate_zlibdecoder_close_impl(void* self, gate_enumint_t close_type); | ||
| 364 | |||
| 365 | static GATE_INTERFACE_VTBL(gate_controlstream) gate_zlibdecoder_vtbl; | ||
| 366 | 2 | static void gate_init_zlibdecoder_vtbl() | |
| 367 | { | ||
| 368 |
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2 | if (!gate_zlibdecoder_vtbl.get_interface_name) |
| 369 | { | ||
| 370 | static GATE_INTERFACE_VTBL(gate_controlstream) local_vtbl = | ||
| 371 | { | ||
| 372 | &gate_zlibdecoder_interface_name_impl, | ||
| 373 | &gate_zlibdecoder_release_impl, | ||
| 374 | &gate_zlibdecoder_retain_impl, | ||
| 375 | |||
| 376 | &gate_zlibdecoder_read_impl, | ||
| 377 | &gate_zlibdecoder_peek_impl, | ||
| 378 | &gate_zlibdecoder_write_impl, | ||
| 379 | &gate_zlibdecoder_flush_impl, | ||
| 380 | |||
| 381 | &gate_zlibdecoder_get_resource_impl, | ||
| 382 | |||
| 383 | &gate_zlibdecoder_can_read_impl, | ||
| 384 | &gate_zlibdecoder_can_write_impl, | ||
| 385 | &gate_zlibdecoder_get_size_impl, | ||
| 386 | &gate_zlibdecoder_get_available_impl, | ||
| 387 | &gate_zlibdecoder_seek_impl, | ||
| 388 | &gate_zlibdecoder_reset_impl, | ||
| 389 | &gate_zlibdecoder_close_impl | ||
| 390 | }; | ||
| 391 | 1 | gate_zlibdecoder_vtbl = local_vtbl; | |
| 392 | } | ||
| 393 | 2 | } | |
| 394 | |||
| 395 | typedef struct gate_zlibdecoder_impl | ||
| 396 | { | ||
| 397 | GATE_INTERFACE_VTBL(gate_controlstream)* vtbl; | ||
| 398 | |||
| 399 | gate_atomic_int_t ref_counter; /* reference counter */ | ||
| 400 | gate_stream_t* source_stream; /* source stream to deliver compressed data */ | ||
| 401 | z_stream unzipper; /* unzip processing instance */ | ||
| 402 | char source_buffer[GATE_MAX_BLOCK_COPYBUFFER_LENGTH]; /* internal source-stream input buffer */ | ||
| 403 | char decoded_buffer[GATE_MAX_BLOCK_COPYBUFFER_LENGTH]; /* internal output buffer */ | ||
| 404 | gate_size_t decoded_buffer_length; /* current amount of valid bytes in decoded_buffer */ | ||
| 405 | gate_size_t decoded_buffer_offset; /* current start offset of valid bytes in decoded_buffer */ | ||
| 406 | gate_uint64_t bytes_decoded_counter; /* sum of bytes that were sucessfully decompressed */ | ||
| 407 | gate_uint64_t total_bytes_uncompressed; /* estimated total sum of bytes after decompression (incorrect if original data was greater 2^32 bytes) */ | ||
| 408 | |||
| 409 | } gate_zlibdecoder_impl_t; | ||
| 410 | |||
| 411 | 2 | static gate_bool_t gate_zlib_decoder_get_content_length(gate_stream_t* stream, gate_uint64_t* ptr_length) | |
| 412 | { | ||
| 413 | 2 | gate_bool_t ret = false; | |
| 414 | 2 | gate_controlstream_t* ctrl = NULL; | |
| 415 | gate_int64_t start_pos; | ||
| 416 | gate_int64_t avail; | ||
| 417 | gate_int64_t end_pos; | ||
| 418 | gate_result_t result; | ||
| 419 | 2 | char header[10] = { 0 }; | |
| 420 | 2 | char tail[8] = { 0 }; | |
| 421 | gate_size_t received; | ||
| 422 | gate_uint32_t uncompressed_size; | ||
| 423 | |||
| 424 | do | ||
| 425 | { | ||
| 426 |
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2 | if (!gate_object_implements_interface((gate_object_t*)stream, GATE_INTERFACE_NAME_CONTROLSTREAM)) |
| 427 | { | ||
| 428 | 2 | break; | |
| 429 | } | ||
| 430 | |||
| 431 | ✗ | ctrl = (gate_controlstream_t*)stream; | |
| 432 | |||
| 433 | ✗ | result = gate_stream_peek(stream, header, sizeof(header), NULL); | |
| 434 | ✗ | GATE_BREAK_IF_FAILED(result); | |
| 435 | |||
| 436 | ✗ | if ((header[0] != (char)0x01f) || (header[1] != (char)0x08b) /*|| (header[0] != 8)*/) | |
| 437 | { | ||
| 438 | break; | ||
| 439 | } | ||
| 440 | |||
| 441 | ✗ | result = gate_stream_get_position(ctrl, &start_pos); | |
| 442 | ✗ | GATE_BREAK_IF_FAILED(result); | |
| 443 | |||
| 444 | ✗ | result = gate_stream_get_available(ctrl, &avail); | |
| 445 | ✗ | GATE_BREAK_IF_FAILED(result); | |
| 446 | |||
| 447 | ✗ | if (avail < sizeof(tail)) | |
| 448 | { | ||
| 449 | ✗ | break; | |
| 450 | } | ||
| 451 | |||
| 452 | ✗ | end_pos = start_pos + avail; | |
| 453 | |||
| 454 | /* jump to end of file to read tail-bytes */ | ||
| 455 | ✗ | result = gate_stream_seek(ctrl, end_pos - sizeof(tail), GATE_STREAM_SEEK_BEGIN, NULL); | |
| 456 | ✗ | GATE_BREAK_IF_FAILED(result); | |
| 457 | |||
| 458 | ✗ | result = gate_stream_peek(stream, tail, sizeof(tail), &received); | |
| 459 | |||
| 460 | /* jump back to begin of stream */ | ||
| 461 | ✗ | result = gate_stream_seek(ctrl, start_pos, GATE_STREAM_SEEK_BEGIN, NULL); | |
| 462 | ✗ | GATE_BREAK_IF_FAILED(result); | |
| 463 | |||
| 464 | ✗ | uncompressed_size = ((gate_uint32_t)(gate_uint8_t)tail[4]) | |
| 465 | ✗ | | (((gate_uint32_t)(gate_uint8_t)tail[5]) << 8) | |
| 466 | ✗ | | (((gate_uint32_t)(gate_uint8_t)tail[6]) << 16) | |
| 467 | ✗ | | (((gate_uint32_t)(gate_uint8_t)tail[7]) << 24) | |
| 468 | ; | ||
| 469 | ✗ | *ptr_length = uncompressed_size; | |
| 470 | ✗ | ret = true; | |
| 471 | } while (0); | ||
| 472 | |||
| 473 | 2 | return ret; | |
| 474 | |||
| 475 | } | ||
| 476 | |||
| 477 | 2 | gate_result_t gate_zlib_decoder_create(gate_stream_t* input, gate_bool_t gzformat, gate_stream_t** ptr2streamptr) | |
| 478 | { | ||
| 479 | gate_result_t ret; | ||
| 480 | gate_zlibdecoder_impl_t* impl; | ||
| 481 | int zresult; | ||
| 482 | |||
| 483 | do | ||
| 484 | { | ||
| 485 |
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2 | if ((input == NULL) || (ptr2streamptr == NULL)) |
| 486 | { | ||
| 487 | ✗ | ret = GATE_RESULT_NULLPOINTER; | |
| 488 | ✗ | break; | |
| 489 | } | ||
| 490 | 2 | impl = (gate_zlibdecoder_impl_t*)gate_mem_alloc(sizeof(gate_zlibdecoder_impl_t)); | |
| 491 |
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2 | if (impl == NULL) |
| 492 | { | ||
| 493 | ✗ | GATE_DEBUG_TRACE("failed to allocate zlibdecoder"); | |
| 494 | ✗ | ret = GATE_RESULT_OUTOFMEMORY; | |
| 495 | ✗ | break; | |
| 496 | } | ||
| 497 | |||
| 498 | 2 | gate_mem_clear(impl, sizeof(gate_zlibdecoder_impl_t)); | |
| 499 | 2 | gate_init_zlibdecoder_vtbl(); | |
| 500 | 2 | impl->vtbl = &gate_zlibdecoder_vtbl; | |
| 501 | 2 | gate_atomic_int_init(&impl->ref_counter, 1); | |
| 502 | 2 | impl->source_stream = input; | |
| 503 | |||
| 504 | 2 | gate_zlib_decoder_get_content_length(input, &impl->total_bytes_uncompressed); | |
| 505 | |||
| 506 | 2 | impl->unzipper.zalloc = &gate_zlibstream_alloc_func; | |
| 507 | 2 | impl->unzipper.opaque = Z_NULL; | |
| 508 | 2 | impl->unzipper.zfree = &gate_zlibstream_free_func; | |
| 509 | |||
| 510 |
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2 | zresult = inflateInit2(&impl->unzipper, (gzformat == true ? MAX_WBITS + 32 : MAX_WBITS)); |
| 511 |
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2 | if (zresult != Z_OK) |
| 512 | { | ||
| 513 | ✗ | GATE_DEBUG_TRACE_MSG_VALUE("inflateInit2() failed", zresult); | |
| 514 | ✗ | gate_mem_dealloc(impl); | |
| 515 | ✗ | ret = GATE_RESULT_FAILED; | |
| 516 | ✗ | break; | |
| 517 | } | ||
| 518 | |||
| 519 | 2 | gate_object_retain(impl->source_stream); | |
| 520 | 2 | *ptr2streamptr = (gate_stream_t*)impl; | |
| 521 | |||
| 522 | 2 | ret = GATE_RESULT_OK; | |
| 523 | } while (0); | ||
| 524 | |||
| 525 | 2 | return ret; | |
| 526 | } | ||
| 527 | |||
| 528 | |||
| 529 | ✗ | static char const* gate_zlibdecoder_interface_name_impl(void* self) | |
| 530 | { | ||
| 531 | ✗ | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 532 | ✗ | if (gate_object_implements_interface((gate_object_t*)impl->source_stream, GATE_INTERFACE_NAME_CONTROLSTREAM)) | |
| 533 | { | ||
| 534 | ✗ | return GATE_INTERFACE_NAME_CONTROLSTREAM; | |
| 535 | } | ||
| 536 | ✗ | return GATE_INTERFACE_NAME_STREAM; | |
| 537 | } | ||
| 538 | |||
| 539 | 2 | static void gate_zlibdecoder_release_impl(void* self) | |
| 540 | { | ||
| 541 | 2 | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 542 |
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2 | if (gate_atomic_int_dec(&impl->ref_counter) == 0) |
| 543 | { | ||
| 544 | 2 | inflateEnd(&impl->unzipper); | |
| 545 | 2 | gate_object_release(impl->source_stream); | |
| 546 | 2 | gate_mem_dealloc(impl); | |
| 547 | } | ||
| 548 | 2 | } | |
| 549 | ✗ | static int gate_zlibdecoder_retain_impl(void* self) | |
| 550 | { | ||
| 551 | ✗ | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 552 | ✗ | return gate_atomic_int_inc(&impl->ref_counter); | |
| 553 | } | ||
| 554 | |||
| 555 | 22 | static gate_result_t gate_zlibdecoder_peek_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned) | |
| 556 | { | ||
| 557 | 22 | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 558 | |||
| 559 | 22 | gate_bool_t end_of_stream = false; | |
| 560 | gate_size_t bytecount; | ||
| 561 | gate_result_t result; | ||
| 562 | gate_size_t diff; | ||
| 563 | int zresult; | ||
| 564 | |||
| 565 |
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24 | while ((impl->decoded_buffer_length == 0) && (!end_of_stream)) |
| 566 | { | ||
| 567 |
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4 | if (impl->unzipper.avail_in == 0) |
| 568 | { | ||
| 569 | 4 | result = gate_stream_read(impl->source_stream, impl->source_buffer, sizeof(impl->source_buffer), &bytecount); | |
| 570 |
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4 | if (GATE_FAILED(result)) |
| 571 | { | ||
| 572 | ✗ | GATE_DEBUG_TRACE_MSG_VALUE("zlibdecoder_peek stream_read failed", result); | |
| 573 | ✗ | return result; | |
| 574 | } | ||
| 575 |
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4 | if (bytecount == 0) |
| 576 | { | ||
| 577 | 2 | break; | |
| 578 | } | ||
| 579 | 2 | impl->unzipper.next_in = (Bytef*)&impl->source_buffer[0]; | |
| 580 | 2 | impl->unzipper.avail_in = (uInt)bytecount; | |
| 581 | } | ||
| 582 | |||
| 583 | |||
| 584 | 2 | impl->unzipper.avail_out = sizeof(impl->decoded_buffer); | |
| 585 | 2 | impl->unzipper.next_out = (Bytef*)(&impl->decoded_buffer[0]); | |
| 586 | |||
| 587 | 2 | zresult = inflate(&impl->unzipper, Z_NO_FLUSH); | |
| 588 | |||
| 589 |
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2 | switch (zresult) |
| 590 | { | ||
| 591 | ✗ | case Z_STREAM_ERROR: | |
| 592 | case Z_NEED_DICT: | ||
| 593 | case Z_DATA_ERROR: | ||
| 594 | case Z_MEM_ERROR: | ||
| 595 | { | ||
| 596 | ✗ | GATE_DEBUG_TRACE_MSG_VALUE("inflate() failed", zresult); | |
| 597 | ✗ | return GATE_RESULT_FAILED; | |
| 598 | } | ||
| 599 | 2 | case Z_STREAM_END: | |
| 600 | { | ||
| 601 | 2 | end_of_stream = true; | |
| 602 | 2 | break; | |
| 603 | } | ||
| 604 | ✗ | case Z_BUF_ERROR: | |
| 605 | { | ||
| 606 | /* ignore */ | ||
| 607 | ✗ | GATE_DEBUG_BREAKPOINT; | |
| 608 | ✗ | break; | |
| 609 | } | ||
| 610 | ✗ | case Z_OK: | |
| 611 | { | ||
| 612 | /* success -> continue */ | ||
| 613 | ✗ | break; | |
| 614 | } | ||
| 615 | } | ||
| 616 | |||
| 617 | 2 | GATE_DEBUG_ASSERT(sizeof(impl->decoded_buffer) >= impl->unzipper.avail_out); | |
| 618 | 2 | diff = sizeof(impl->decoded_buffer) - impl->unzipper.avail_out; | |
| 619 | 2 | impl->decoded_buffer_length = diff; | |
| 620 | 2 | impl->decoded_buffer_offset = 0; | |
| 621 | } | ||
| 622 | |||
| 623 |
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22 | if (bufferlength < impl->decoded_buffer_length) |
| 624 | { | ||
| 625 | 18 | gate_mem_copy(buffer, &impl->decoded_buffer[impl->decoded_buffer_offset], bufferlength); | |
| 626 |
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18 | if (returned != NULL) |
| 627 | { | ||
| 628 | 18 | *returned = bufferlength; | |
| 629 | } | ||
| 630 | } | ||
| 631 | else | ||
| 632 | { | ||
| 633 |
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4 | if (impl->decoded_buffer_length > 0) |
| 634 | { | ||
| 635 | 2 | gate_mem_copy(buffer, &impl->decoded_buffer[impl->decoded_buffer_offset], impl->decoded_buffer_length); | |
| 636 | } | ||
| 637 |
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4 | if (returned != NULL) |
| 638 | { | ||
| 639 | 4 | *returned = impl->decoded_buffer_length; | |
| 640 | } | ||
| 641 | } | ||
| 642 | 22 | return GATE_RESULT_OK; | |
| 643 | } | ||
| 644 | |||
| 645 | 22 | static gate_result_t gate_zlibdecoder_read_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned) | |
| 646 | { | ||
| 647 | 22 | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 648 | 22 | gate_size_t tmp = 0; | |
| 649 | 22 | gate_result_t ret = gate_zlibdecoder_peek_impl(self, buffer, bufferlength, &tmp); | |
| 650 |
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22 | if (returned != NULL) |
| 651 | { | ||
| 652 | 22 | *returned = tmp; | |
| 653 | } | ||
| 654 |
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22 | if (GATE_SUCCEEDED(ret)) |
| 655 | { | ||
| 656 | 22 | impl->decoded_buffer_offset += tmp; | |
| 657 | 22 | impl->decoded_buffer_length -= tmp; | |
| 658 | 22 | impl->bytes_decoded_counter += tmp; | |
| 659 | } | ||
| 660 | 22 | return ret; | |
| 661 | } | ||
| 662 | |||
| 663 | ✗ | static gate_result_t gate_zlibdecoder_write_impl(void* self, char const* buffer, gate_size_t bufferlength, gate_size_t* written) | |
| 664 | { | ||
| 665 | GATE_UNUSED_ARG(self); | ||
| 666 | GATE_UNUSED_ARG(buffer); | ||
| 667 | GATE_UNUSED_ARG(bufferlength); | ||
| 668 | GATE_UNUSED_ARG(written); | ||
| 669 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 670 | } | ||
| 671 | |||
| 672 | ✗ | static gate_result_t gate_zlibdecoder_flush_impl(void* self) | |
| 673 | { | ||
| 674 | GATE_UNUSED_ARG(self); | ||
| 675 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 676 | } | ||
| 677 | |||
| 678 | ✗ | static gate_result_t gate_zlibdecoder_get_resource_impl(void* self, gate_enumint_t resource_type, gate_uintptr_t* resource) | |
| 679 | { | ||
| 680 | ✗ | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 681 | gate_controlstream_t* ctrl; | ||
| 682 | |||
| 683 | ✗ | if (gate_object_implements_interface((gate_object_t*)impl->source_stream, GATE_INTERFACE_NAME_CONTROLSTREAM)) | |
| 684 | { | ||
| 685 | ✗ | ctrl = (gate_controlstream_t*)impl->source_stream; | |
| 686 | ✗ | return gate_stream_get_resource(ctrl, resource_type, resource); | |
| 687 | } | ||
| 688 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 689 | } | ||
| 690 | |||
| 691 | ✗ | static gate_result_t gate_zlibdecoder_can_read_impl(void* self, gate_bool_t* return_value) | |
| 692 | { | ||
| 693 | ✗ | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 694 | gate_controlstream_t* ctrl; | ||
| 695 | |||
| 696 | ✗ | if (gate_object_implements_interface((gate_object_t*)impl->source_stream, GATE_INTERFACE_NAME_CONTROLSTREAM)) | |
| 697 | { | ||
| 698 | ✗ | ctrl = (gate_controlstream_t*)impl->source_stream; | |
| 699 | ✗ | return gate_stream_can_read(ctrl, return_value); | |
| 700 | } | ||
| 701 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 702 | } | ||
| 703 | |||
| 704 | ✗ | static gate_result_t gate_zlibdecoder_can_write_impl(void* self, gate_bool_t* return_value) | |
| 705 | { | ||
| 706 | GATE_UNUSED_ARG(self); | ||
| 707 | ✗ | if (return_value) | |
| 708 | { | ||
| 709 | ✗ | *return_value = false; | |
| 710 | } | ||
| 711 | ✗ | return GATE_RESULT_OK; | |
| 712 | } | ||
| 713 | |||
| 714 | ✗ | static gate_result_t gate_zlibdecoder_get_size_impl(void* self, gate_int64_t* return_value) | |
| 715 | { | ||
| 716 | ✗ | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 717 | gate_controlstream_t* ctrl; | ||
| 718 | |||
| 719 | ✗ | if (gate_object_implements_interface((gate_object_t*)impl->source_stream, GATE_INTERFACE_NAME_CONTROLSTREAM)) | |
| 720 | { | ||
| 721 | ✗ | ctrl = (gate_controlstream_t*)impl->source_stream; | |
| 722 | ✗ | if (return_value) | |
| 723 | { | ||
| 724 | ✗ | *return_value = (gate_int64_t)impl->total_bytes_uncompressed; | |
| 725 | } | ||
| 726 | ✗ | return GATE_RESULT_OK; | |
| 727 | } | ||
| 728 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 729 | } | ||
| 730 | |||
| 731 | ✗ | static gate_result_t gate_zlibdecoder_get_available_impl(void* self, gate_int64_t* return_value) | |
| 732 | { | ||
| 733 | ✗ | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 734 | gate_controlstream_t* ctrl; | ||
| 735 | |||
| 736 | ✗ | if (gate_object_implements_interface((gate_object_t*)impl->source_stream, GATE_INTERFACE_NAME_CONTROLSTREAM)) | |
| 737 | { | ||
| 738 | ✗ | ctrl = (gate_controlstream_t*)impl->source_stream; | |
| 739 | ✗ | if (return_value) | |
| 740 | { | ||
| 741 | ✗ | if (impl->total_bytes_uncompressed >= impl->bytes_decoded_counter) | |
| 742 | { | ||
| 743 | ✗ | *return_value = (gate_int64_t)impl->total_bytes_uncompressed - impl->bytes_decoded_counter; | |
| 744 | } | ||
| 745 | else | ||
| 746 | { | ||
| 747 | ✗ | *return_value = 0; | |
| 748 | } | ||
| 749 | } | ||
| 750 | ✗ | return GATE_RESULT_OK; | |
| 751 | } | ||
| 752 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 753 | } | ||
| 754 | |||
| 755 | |||
| 756 | ✗ | static gate_result_t gate_zlibdecoder_seek_impl(void* self, gate_int64_t position, gate_enumint_t origin, gate_int64_t* final_position) | |
| 757 | { | ||
| 758 | ✗ | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 759 | ✗ | if ((origin == GATE_STREAM_SEEK_CURRENT) && (position == 0)) | |
| 760 | { | ||
| 761 | /* special case: return current position in decoded stream (no change at all) */ | ||
| 762 | ✗ | if (final_position) | |
| 763 | { | ||
| 764 | ✗ | *final_position = (gate_int64_t)impl->bytes_decoded_counter; | |
| 765 | } | ||
| 766 | ✗ | return GATE_RESULT_OK; | |
| 767 | } | ||
| 768 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 769 | } | ||
| 770 | |||
| 771 | |||
| 772 | ✗ | static gate_result_t gate_zlibdecoder_reset_impl(void* self) | |
| 773 | { | ||
| 774 | GATE_UNUSED_ARG(self); | ||
| 775 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 776 | } | ||
| 777 | |||
| 778 | |||
| 779 | ✗ | static gate_result_t gate_zlibdecoder_close_impl(void* self, gate_enumint_t close_type) | |
| 780 | { | ||
| 781 | ✗ | gate_zlibdecoder_impl_t* impl = (gate_zlibdecoder_impl_t*)self; | |
| 782 | gate_controlstream_t* ctrl; | ||
| 783 | |||
| 784 | ✗ | if (gate_object_implements_interface((gate_object_t*)impl->source_stream, GATE_INTERFACE_NAME_CONTROLSTREAM)) | |
| 785 | { | ||
| 786 | ✗ | ctrl = (gate_controlstream_t*)impl->source_stream; | |
| 787 | ✗ | return gate_stream_close(ctrl, close_type); | |
| 788 | } | ||
| 789 | ✗ | return GATE_RESULT_NOTSUPPORTED; | |
| 790 | } | ||
| 791 | |||
| 792 | #endif /* GATE_ENCODE_ZLIBSTREAM_USE_ZLIB */ | ||
| 793 | |||
| 794 | |||
| 795 | #if defined(GATE_ENCODE_ZLIBSTREAM_NO_IMPL) | ||
| 796 | |||
| 797 | gate_result_t gate_zlib_encoder_create(gate_stream_t* output, gate_bool_t gzformat, | ||
| 798 | gate_int16_t compression, gate_stream_t** ptr2streamptr) | ||
| 799 | { | ||
| 800 | return GATE_RESULT_NOTIMPLEMENTED; | ||
| 801 | } | ||
| 802 | |||
| 803 | gate_result_t gate_zlib_decoder_create(gate_stream_t* input, gate_bool_t gzformat, | ||
| 804 | gate_stream_t** ptr2streamptr) | ||
| 805 | { | ||
| 806 | return GATE_RESULT_NOTIMPLEMENTED; | ||
| 807 | } | ||
| 808 | |||
| 809 | #endif /* GATE_ENCODE_ZLIBSTREAM_NO_IMPL */ | ||
| 810 | |||
| 811 |