| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * mpq-api.c -- public archive, file and block operations. | ||
| 3 | * | ||
| 4 | * Copyright (c) 2003-2026 Maik Broemme <mbroemme@libmpq.org> | ||
| 5 | * | ||
| 6 | * This file is free software; you can redistribute it and/or modify | ||
| 7 | * it under the terms of the GNU Lesser General Public License as published by | ||
| 8 | * the Free Software Foundation; either version 2.1 of the License, or | ||
| 9 | * (at your option) any later version. | ||
| 10 | * | ||
| 11 | * This file is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 14 | * GNU Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public License | ||
| 17 | * along with this file; if not, see <https://www.gnu.org/licenses/>. | ||
| 18 | */ | ||
| 19 | |||
| 20 | #ifdef HAVE_CONFIG_H | ||
| 21 | #include "config.h" | ||
| 22 | #endif | ||
| 23 | |||
| 24 | /* Export only public wrappers when building a Windows DLL. */ | ||
| 25 | #if defined(_WIN32) && defined(DLL_EXPORT) | ||
| 26 | #define LIBMPQ_API __declspec(dllexport) | ||
| 27 | #endif | ||
| 28 | |||
| 29 | #include <libmpq/mpq.h> | ||
| 30 | |||
| 31 | #include "mpq-archive.h" | ||
| 32 | #include "mpq-attributes.h" | ||
| 33 | #include "mpq-block.h" | ||
| 34 | #include "mpq-compression.h" | ||
| 35 | #include "mpq-crypto.h" | ||
| 36 | #include "mpq-endian.h" | ||
| 37 | #include "mpq-patch-writer.h" | ||
| 38 | #include "mpq-reader.h" | ||
| 39 | #include "mpq-rsa.h" | ||
| 40 | #include "mpq-signature.h" | ||
| 41 | #include "mpq-source.h" | ||
| 42 | #include "mpq-stream.h" | ||
| 43 | #include "mpq-update.h" | ||
| 44 | #include "mpq-verify.h" | ||
| 45 | #include "mpq-writer.h" | ||
| 46 | |||
| 47 | #include <stddef.h> | ||
| 48 | #include <stdlib.h> | ||
| 49 | #include <string.h> | ||
| 50 | |||
| 51 | /* | ||
| 52 | * C99-compatible compile-time checks of native public value layouts. | ||
| 53 | * These describe host-side structs, not the little-endian disk format. | ||
| 54 | */ | ||
| 55 | #define LIBMPQ_ABI_SIZE(type, bytes) \ | ||
| 56 | typedef char type##_size_check[sizeof(type) == (bytes) ? 1 : -1] | ||
| 57 | #define LIBMPQ_ABI_FIELD(type, field, offset, bytes) \ | ||
| 58 | typedef char type##_##field##_layout_check \ | ||
| 59 | [offsetof(type, field) == (offset) && sizeof(((type *)0)->field) == (bytes) ? 1 : -1] | ||
| 60 | |||
| 61 | LIBMPQ_ABI_SIZE(mpq_archive_create_options_s, 20); | ||
| 62 | LIBMPQ_ABI_FIELD(mpq_archive_create_options_s, version, 0, 4); | ||
| 63 | LIBMPQ_ABI_FIELD(mpq_archive_create_options_s, max_files, 4, 4); | ||
| 64 | LIBMPQ_ABI_FIELD(mpq_archive_create_options_s, sector_size, 8, 4); | ||
| 65 | LIBMPQ_ABI_FIELD(mpq_archive_create_options_s, flags, 12, 4); | ||
| 66 | LIBMPQ_ABI_FIELD(mpq_archive_create_options_s, attributes, 16, 4); | ||
| 67 | |||
| 68 | LIBMPQ_ABI_SIZE(mpq_file_options_s, 16); | ||
| 69 | LIBMPQ_ABI_FIELD(mpq_file_options_s, flags, 0, 4); | ||
| 70 | LIBMPQ_ABI_FIELD(mpq_file_options_s, compression_first, 4, 4); | ||
| 71 | LIBMPQ_ABI_FIELD(mpq_file_options_s, compression_next, 8, 4); | ||
| 72 | LIBMPQ_ABI_FIELD(mpq_file_options_s, locale, 12, 2); | ||
| 73 | LIBMPQ_ABI_FIELD(mpq_file_options_s, platform, 14, 2); | ||
| 74 | |||
| 75 | LIBMPQ_ABI_SIZE(mpq_file_attributes_s, 40); | ||
| 76 | LIBMPQ_ABI_FIELD(mpq_file_attributes_s, flags, 0, 4); | ||
| 77 | LIBMPQ_ABI_FIELD(mpq_file_attributes_s, crc32, 4, 4); | ||
| 78 | LIBMPQ_ABI_FIELD(mpq_file_attributes_s, filetime, 8, 8); | ||
| 79 | LIBMPQ_ABI_FIELD(mpq_file_attributes_s, md5, 16, 16); | ||
| 80 | LIBMPQ_ABI_FIELD(mpq_file_attributes_s, patch_bit, 32, 4); | ||
| 81 | LIBMPQ_ABI_FIELD(mpq_file_attributes_s, reserved, 36, 4); | ||
| 82 | |||
| 83 | #undef LIBMPQ_ABI_FIELD | ||
| 84 | #undef LIBMPQ_ABI_SIZE | ||
| 85 | |||
| 86 | /* Error strings indexed by the negated libmpq error code. */ | ||
| 87 | static const char *libmpq_error_strings[] = { "success", | ||
| 88 | "open error on file", | ||
| 89 | "close error on file", | ||
| 90 | "lseek error on file", | ||
| 91 | "read error on file", | ||
| 92 | "write error on file", | ||
| 93 | "memory allocation error", | ||
| 94 | "format error", | ||
| 95 | "init() wasn't called", | ||
| 96 | "buffer size is too small", | ||
| 97 | "archive, file, or block does not exist", | ||
| 98 | "we don't know the decryption seed", | ||
| 99 | "error on unpacking file" }; | ||
| 100 | |||
| 101 | /* | ||
| 102 | * Return the configured libmpq package version. | ||
| 103 | * The returned pointer refers to immutable library storage and remains valid | ||
| 104 | * for the lifetime of the process. | ||
| 105 | */ | ||
| 106 | const char * | ||
| 107 | 2 | libmpq__version(void) | |
| 108 | { | ||
| 109 | 2 | return VERSION; | |
| 110 | } | ||
| 111 | |||
| 112 | /* Query whether writer compression is allowed without restricting archive decoding. */ | ||
| 113 | int32_t | ||
| 114 | 5439 | libmpq__archive_compression_allowed( | |
| 115 | uint32_t archive_version, uint32_t compression_mask, libmpq_compression_policy_t policy | ||
| 116 | ) | ||
| 117 | { | ||
| 118 | 5439 | return libmpq__compression_allowed(archive_version, compression_mask, policy); | |
| 119 | } | ||
| 120 | |||
| 121 | /* Signature queries and verification are explicit and do not affect reads. */ | ||
| 122 | int32_t | ||
| 123 | 59 | libmpq__archive_signatures(mpq_archive_s *archive, uint32_t *signatures) | |
| 124 | { | ||
| 125 | 59 | return libmpq__signature_detect(archive, signatures); | |
| 126 | } | ||
| 127 | |||
| 128 | int32_t | ||
| 129 | 67 | libmpq__archive_verify( | |
| 130 | mpq_archive_s *archive, uint32_t flags, const uint8_t *key, size_t key_size, | ||
| 131 | uint32_t *mismatches | ||
| 132 | ) | ||
| 133 | { | ||
| 134 | 67 | return libmpq__signature_verify(archive, flags, key, key_size, mismatches); | |
| 135 | } | ||
| 136 | |||
| 137 | int32_t | ||
| 138 | 46 | libmpq__archive_sign(mpq_archive_s *archive, uint32_t type, const uint8_t *key, size_t key_size) | |
| 139 | { | ||
| 140 | 46 | return libmpq__signature_configure(archive, type, key, key_size); | |
| 141 | } | ||
| 142 | |||
| 143 | /* | ||
| 144 | * Return the optional attributes header flags without affecting normal reads. | ||
| 145 | * Absence and malformed metadata are distinct negative results. | ||
| 146 | */ | ||
| 147 | int32_t | ||
| 148 | 3835 | libmpq__archive_attributes(mpq_archive_s *archive, uint32_t *flags) | |
| 149 | { | ||
| 150 | int32_t result; | ||
| 151 |
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3835 | if (flags != NULL) |
| 152 | 3835 | *flags = 0; | |
| 153 |
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3835 | if (archive == NULL || flags == NULL) |
| 154 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 155 |
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3834 | if (archive->write_mode) |
| 156 | 32 | return LIBMPQ_ERROR_NOT_INITIALIZED; | |
| 157 | 3802 | result = libmpq__attributes_load(archive); | |
| 158 |
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3802 | if (result == 0) |
| 159 | 1771 | *flags = archive->attributes->flags; | |
| 160 | 3802 | return result; | |
| 161 | } | ||
| 162 | |||
| 163 | /* | ||
| 164 | * Translate a public file number before reading stored per-block attributes. | ||
| 165 | * Availability flags distinguish absent legacy values from legitimate zeroes. | ||
| 166 | */ | ||
| 167 | int32_t | ||
| 168 | 3696 | libmpq__file_attributes(mpq_archive_s *archive, uint32_t number, mpq_file_attributes_s *attributes) | |
| 169 | { | ||
| 170 | uint32_t flags; | ||
| 171 | int32_t result; | ||
| 172 |
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3696 | if (attributes != NULL) |
| 173 | 3696 | memset(attributes, 0, sizeof(*attributes)); | |
| 174 |
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3696 | if (archive == NULL || attributes == NULL) |
| 175 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 176 |
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3695 | if (archive->write_mode) |
| 177 | ✗ | return LIBMPQ_ERROR_NOT_INITIALIZED; | |
| 178 |
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3695 | if (libmpq__reader_validate_file_number(archive, number) != 0) |
| 179 | ✗ | return LIBMPQ_ERROR_EXIST; | |
| 180 | 3695 | result = libmpq__archive_attributes(archive, &flags); | |
| 181 |
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3695 | if (result == 0) |
| 182 | 1671 | libmpq__attributes_get( | |
| 183 | 1671 | archive->attributes, archive->mpq_map[number].block_table_indices, attributes | |
| 184 | ); | ||
| 185 | 3695 | return result; | |
| 186 | } | ||
| 187 | |||
| 188 | /* Explicit verification is implemented separately from the public API facade. */ | ||
| 189 | int32_t | ||
| 190 | 1484 | libmpq__file_verify( | |
| 191 | mpq_archive_s *archive, uint32_t file_number, uint32_t verify_flags, uint32_t *mismatches | ||
| 192 | ) | ||
| 193 | { | ||
| 194 | 1484 | return libmpq__verify_file(archive, file_number, verify_flags, mismatches); | |
| 195 | } | ||
| 196 | |||
| 197 | /* Explicitly verify one sector and return its stored checksum. */ | ||
| 198 | int32_t | ||
| 199 | 1784 | libmpq__block_verify( | |
| 200 | mpq_archive_s *archive, uint32_t file_number, uint32_t block_number, uint32_t *checksum, | ||
| 201 | uint32_t *mismatches | ||
| 202 | ) | ||
| 203 | { | ||
| 204 | 1784 | return libmpq__verify_block(archive, file_number, block_number, checksum, mismatches); | |
| 205 | } | ||
| 206 | |||
| 207 | /* | ||
| 208 | * Supply an explicit timestamp for an unfinished source file. | ||
| 209 | * The writer owns the value; no filesystem timestamp is consulted. | ||
| 210 | */ | ||
| 211 | int32_t | ||
| 212 | 33 | libmpq__writer_timestamp(mpq_writer_s *writer, uint64_t filetime) | |
| 213 | { | ||
| 214 | 33 | return libmpq__writer_file_timestamp(writer, filetime); | |
| 215 | } | ||
| 216 | |||
| 217 | /* | ||
| 218 | * Translate a libmpq return code into a static diagnostic string. | ||
| 219 | * Valid codes index an internal immutable table; invalid positive or out-of- | ||
| 220 | * range negative values return NULL instead of reading outside that table. | ||
| 221 | */ | ||
| 222 | const char * | ||
| 223 | 15 | libmpq__strerror(int32_t return_code) | |
| 224 | { | ||
| 225 | |||
| 226 | /* Only negative libmpq error codes and zero are valid table indexes. */ | ||
| 227 |
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15 | if (-return_code < 0 || |
| 228 |
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14 | (size_t)-return_code >= sizeof(libmpq_error_strings) / sizeof(libmpq_error_strings[0])) |
| 229 | 2 | return NULL; | |
| 230 | |||
| 231 | /* Return the static string owned by the library. */ | ||
| 232 | 13 | return libmpq_error_strings[-return_code]; | |
| 233 | } | ||
| 234 | |||
| 235 | /* | ||
| 236 | * Create an MPQ archive through the internal writer implementation. | ||
| 237 | * This public facade preserves the stable API while keeping archive layout | ||
| 238 | * and file-table construction in the writer module. | ||
| 239 | */ | ||
| 240 | int32_t | ||
| 241 | 428 | libmpq__archive_create( | |
| 242 | mpq_archive_s **out, const char *path, const mpq_archive_create_options_s *options | ||
| 243 | ) | ||
| 244 | { | ||
| 245 | 428 | return libmpq__writer_archive_create(out, path, options); | |
| 246 | } | ||
| 247 | |||
| 248 | /* Create an MPQE-wrapped archive through the normal writer and private final transform. */ | ||
| 249 | int32_t | ||
| 250 | 84 | libmpq__archive_create_mpqe( | |
| 251 | mpq_archive_s **out, const char *path, const uint8_t *auth_code, size_t auth_code_size, | ||
| 252 | const mpq_archive_create_options_s *options | ||
| 253 | ) | ||
| 254 | { | ||
| 255 | 84 | return libmpq__writer_archive_create_mpqe(out, path, auth_code, auth_code_size, options); | |
| 256 | } | ||
| 257 | |||
| 258 | int32_t | ||
| 259 | 35 | libmpq__update_begin(mpq_update_s **update, const char *path) | |
| 260 | { | ||
| 261 | 35 | mpq_archive_s *archive = NULL; | |
| 262 | 35 | int32_t result = libmpq__update_transaction_begin(update, path); | |
| 263 | |||
| 264 |
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35 | if (result != 0) |
| 265 | ✗ | return result; | |
| 266 | 35 | result = libmpq__archive_open(&archive, libmpq__update_path(*update), -1); | |
| 267 |
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35 | if (archive != NULL) { |
| 268 | 33 | int32_t close_result = libmpq__archive_close(archive); | |
| 269 | |||
| 270 |
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33 | if (result == 0) |
| 271 | 33 | result = close_result; | |
| 272 | } | ||
| 273 |
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35 | if (result != 0) { |
| 274 | 2 | (void)libmpq__update_transaction_abort(*update); | |
| 275 | 2 | *update = NULL; | |
| 276 | } | ||
| 277 | 35 | return result; | |
| 278 | } | ||
| 279 | |||
| 280 | /* Begin an MPQE transaction with explicit caller authentication. */ | ||
| 281 | int32_t | ||
| 282 | 14 | libmpq__update_begin_mpqe( | |
| 283 | mpq_update_s **update, const char *path, const uint8_t *auth_code, size_t auth_code_size | ||
| 284 | ) | ||
| 285 | { | ||
| 286 | 14 | return libmpq__update_transaction_begin_mpqe(update, path, auth_code, auth_code_size); | |
| 287 | } | ||
| 288 | |||
| 289 | int32_t | ||
| 290 | 24 | libmpq__update_replace_data( | |
| 291 | mpq_update_s *update, const char *filename, const uint8_t *data, libmpq__off_t size, | ||
| 292 | const mpq_file_options_s *options | ||
| 293 | ) | ||
| 294 | { | ||
| 295 | 24 | return libmpq__update_transaction_replace(update, filename, data, size, NULL, options); | |
| 296 | } | ||
| 297 | |||
| 298 | int32_t | ||
| 299 | 6 | libmpq__update_replace_path( | |
| 300 | mpq_update_s *update, const char *filename, const char *source_path, | ||
| 301 | const mpq_file_options_s *options | ||
| 302 | ) | ||
| 303 | { | ||
| 304 | 6 | return libmpq__update_transaction_replace(update, filename, NULL, 0, source_path, options); | |
| 305 | } | ||
| 306 | |||
| 307 | int32_t | ||
| 308 | 9 | libmpq__update_remove(mpq_update_s *update, const char *filename) | |
| 309 | { | ||
| 310 | 9 | return libmpq__update_transaction_remove(update, filename); | |
| 311 | } | ||
| 312 | |||
| 313 | int32_t | ||
| 314 | 13 | libmpq__update_rename(mpq_update_s *update, const char *old_filename, const char *new_filename) | |
| 315 | { | ||
| 316 | 13 | return libmpq__update_transaction_rename(update, old_filename, new_filename); | |
| 317 | } | ||
| 318 | |||
| 319 | int32_t | ||
| 320 | 32 | libmpq__update_commit(mpq_update_s *update) | |
| 321 | { | ||
| 322 | 32 | mpq_archive_s *archive = NULL; | |
| 323 | int32_t result; | ||
| 324 | |||
| 325 |
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32 | if (update == NULL) |
| 326 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 327 | 31 | result = libmpq__archive_open(&archive, libmpq__update_path(update), -1); | |
| 328 |
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31 | if (archive != NULL) { |
| 329 | 29 | int32_t close_result = libmpq__archive_close(archive); | |
| 330 | |||
| 331 |
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29 | if (result == 0) |
| 332 | 29 | result = close_result; | |
| 333 | } | ||
| 334 |
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31 | if (result != 0) { |
| 335 | 2 | (void)libmpq__update_transaction_abort(update); | |
| 336 | 2 | return result; | |
| 337 | } | ||
| 338 | 29 | return libmpq__update_transaction_commit(update); | |
| 339 | } | ||
| 340 | |||
| 341 | int32_t | ||
| 342 | 16 | libmpq__update_abort(mpq_update_s *update) | |
| 343 | { | ||
| 344 | 16 | return libmpq__update_transaction_abort(update); | |
| 345 | } | ||
| 346 | |||
| 347 | int32_t | ||
| 348 | 12 | libmpq__patch_begin(mpq_patch_s **patch, const char *base_archive, const char *output_patch) | |
| 349 | { | ||
| 350 | 12 | return libmpq__patch_writer_begin(patch, base_archive, output_patch); | |
| 351 | } | ||
| 352 | |||
| 353 | int32_t | ||
| 354 | 7 | libmpq__patch_begin_mpqe( | |
| 355 | mpq_patch_s **patch, const char *base_archive, const char *output_patch, | ||
| 356 | const uint8_t *auth_code, size_t auth_code_size | ||
| 357 | ) | ||
| 358 | { | ||
| 359 | 7 | return libmpq__patch_writer_begin_mpqe( | |
| 360 | patch, base_archive, output_patch, auth_code, auth_code_size | ||
| 361 | ); | ||
| 362 | } | ||
| 363 | |||
| 364 | int32_t | ||
| 365 | 30 | libmpq__patch_sign( | |
| 366 | mpq_patch_s *patch, uint32_t signature_type, const uint8_t *private_key, size_t private_key_size | ||
| 367 | ) | ||
| 368 | { | ||
| 369 | 30 | return libmpq__patch_writer_sign(patch, signature_type, private_key, private_key_size); | |
| 370 | } | ||
| 371 | |||
| 372 | int32_t | ||
| 373 | 12 | libmpq__patch_replace_data( | |
| 374 | mpq_patch_s *patch, const char *filename, const uint8_t *data, libmpq__off_t size, | ||
| 375 | const mpq_file_options_s *options | ||
| 376 | ) | ||
| 377 | { | ||
| 378 | 12 | return libmpq__patch_writer_replace(patch, filename, data, size, options); | |
| 379 | } | ||
| 380 | |||
| 381 | int32_t | ||
| 382 | 3 | libmpq__patch_replace_path( | |
| 383 | mpq_patch_s *patch, const char *filename, const char *source_path, | ||
| 384 | const mpq_file_options_s *options | ||
| 385 | ) | ||
| 386 | { | ||
| 387 | 3 | return libmpq__patch_writer_replace_path(patch, filename, source_path, options); | |
| 388 | } | ||
| 389 | |||
| 390 | int32_t | ||
| 391 | 7 | libmpq__patch_remove(mpq_patch_s *patch, const char *filename) | |
| 392 | { | ||
| 393 | 7 | return libmpq__patch_writer_remove(patch, filename); | |
| 394 | } | ||
| 395 | |||
| 396 | int32_t | ||
| 397 | 14 | libmpq__patch_finish(mpq_patch_s *patch) | |
| 398 | { | ||
| 399 | 14 | return libmpq__patch_writer_finish(patch); | |
| 400 | } | ||
| 401 | |||
| 402 | int32_t | ||
| 403 | 4 | libmpq__patch_abort(mpq_patch_s *patch) | |
| 404 | { | ||
| 405 | 4 | return libmpq__patch_writer_abort(patch); | |
| 406 | } | ||
| 407 | |||
| 408 | /* | ||
| 409 | * Begin a streamed file through the internal writer implementation. | ||
| 410 | * The returned opaque writer owns the in-progress file state until finish or | ||
| 411 | * an error closes the stream. | ||
| 412 | */ | ||
| 413 | int32_t | ||
| 414 | 47 | libmpq__writer_begin( | |
| 415 | mpq_archive_s *archive, const char *name, libmpq__off_t size, const mpq_file_options_s *options, | ||
| 416 | mpq_writer_s **out | ||
| 417 | ) | ||
| 418 | { | ||
| 419 | 47 | return libmpq__writer_file_begin(archive, name, size, options, out); | |
| 420 | } | ||
| 421 | |||
| 422 | /* | ||
| 423 | * Write one input range through the internal writer implementation. | ||
| 424 | * The writer validates the declared file size and buffers or flushes sectors | ||
| 425 | * according to the selected storage and compression options. | ||
| 426 | */ | ||
| 427 | int32_t | ||
| 428 | 80 | libmpq__writer_write(mpq_writer_s *writer, const uint8_t *buffer, libmpq__off_t size) | |
| 429 | { | ||
| 430 | 80 | return libmpq__writer_file_write(writer, buffer, size); | |
| 431 | } | ||
| 432 | |||
| 433 | /* | ||
| 434 | * Finish a streamed file through the internal writer implementation. | ||
| 435 | * Finalization verifies that all declared bytes were supplied and publishes | ||
| 436 | * the completed file entry in the archive tables. | ||
| 437 | */ | ||
| 438 | int32_t | ||
| 439 | 41 | libmpq__writer_finish(mpq_writer_s *writer) | |
| 440 | { | ||
| 441 | 41 | return libmpq__writer_file_finish(writer); | |
| 442 | } | ||
| 443 | |||
| 444 | /* | ||
| 445 | * Add an in-memory file through the internal writer implementation. | ||
| 446 | * The convenience call performs begin, write, and finish operations while | ||
| 447 | * retaining the same validation and compression behavior as streaming. | ||
| 448 | */ | ||
| 449 | int32_t | ||
| 450 | 2483 | libmpq__archive_add_data( | |
| 451 | mpq_archive_s *archive, const char *name, const uint8_t *data, libmpq__off_t size, | ||
| 452 | const mpq_file_options_s *options | ||
| 453 | ) | ||
| 454 | { | ||
| 455 | 2483 | return libmpq__writer_file_add(archive, name, data, size, options); | |
| 456 | } | ||
| 457 | |||
| 458 | /* | ||
| 459 | * Add a filesystem file through the internal writer implementation. | ||
| 460 | * The source is read in bounded chunks, so callers need not load the complete | ||
| 461 | * file into memory before archive creation begins. | ||
| 462 | */ | ||
| 463 | int32_t | ||
| 464 | 5 | libmpq__archive_add_path( | |
| 465 | mpq_archive_s *archive, const char *name, const char *source, const mpq_file_options_s *options | ||
| 466 | ) | ||
| 467 | { | ||
| 468 | 5 | return libmpq__writer_file_add_path(archive, name, source, options); | |
| 469 | } | ||
| 470 | |||
| 471 | /* | ||
| 472 | * Open an MPQ archive from a path and optional embedded archive offset. | ||
| 473 | * A sentinel offset enables embedded-header scanning, while an explicit offset | ||
| 474 | * restricts parsing to the requested archive location. | ||
| 475 | */ | ||
| 476 | int32_t | ||
| 477 | 1287 | libmpq__archive_open( | |
| 478 | mpq_archive_s **mpq_archive, const char *mpq_filename, libmpq__off_t archive_offset | ||
| 479 | ) | ||
| 480 | { | ||
| 481 | 1287 | return libmpq__reader_archive_open_path(mpq_archive, mpq_filename, archive_offset); | |
| 482 | } | ||
| 483 | |||
| 484 | int32_t | ||
| 485 | 20 | libmpq__archive_open_io( | |
| 486 | mpq_archive_s **mpq_archive, void *context, libmpq_read_at_fn read_at, | ||
| 487 | libmpq__off_t source_size, libmpq__off_t archive_offset, const char *source_name | ||
| 488 | ) | ||
| 489 | { | ||
| 490 | 20 | return libmpq__reader_archive_open_io( | |
| 491 | mpq_archive, context, read_at, source_size, archive_offset, source_name | ||
| 492 | ); | ||
| 493 | } | ||
| 494 | |||
| 495 | /* Open a caller-authenticated MPQE stream before parsing the contained MPQ. */ | ||
| 496 | int32_t | ||
| 497 | 119 | libmpq__archive_open_mpqe( | |
| 498 | mpq_archive_s **mpq_archive, const char *mpq_filename, libmpq__off_t archive_offset, | ||
| 499 | const uint8_t *auth_code, size_t auth_code_size | ||
| 500 | ) | ||
| 501 | { | ||
| 502 | 119 | return libmpq__reader_archive_open_mpqe( | |
| 503 | mpq_archive, mpq_filename, archive_offset, auth_code, auth_code_size | ||
| 504 | ); | ||
| 505 | } | ||
| 506 | |||
| 507 | int32_t | ||
| 508 | 6 | libmpq__archive_open_mpqe_io( | |
| 509 | mpq_archive_s **mpq_archive, void *context, libmpq_read_at_fn read_at, | ||
| 510 | libmpq__off_t source_size, libmpq__off_t archive_offset, const uint8_t *auth_code, | ||
| 511 | size_t auth_code_size, const char *source_name | ||
| 512 | ) | ||
| 513 | { | ||
| 514 | 6 | return libmpq__reader_archive_open_mpqe_io( | |
| 515 | mpq_archive, context, read_at, source_size, archive_offset, auth_code, auth_code_size, | ||
| 516 | source_name | ||
| 517 | ); | ||
| 518 | } | ||
| 519 | |||
| 520 | /* | ||
| 521 | * Reopen an archive with independent file I/O, metadata, and lazy caches. | ||
| 522 | * Cloning rejects writer handles and verifies a path-backed source still | ||
| 523 | * identifies the same file before reparsing it into a separate archive object. | ||
| 524 | */ | ||
| 525 | int32_t | ||
| 526 | 222 | libmpq__archive_clone(mpq_archive_s **clone, mpq_archive_s *source) | |
| 527 | { | ||
| 528 |
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222 | if (clone == NULL) |
| 529 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 530 | 221 | *clone = NULL; | |
| 531 | |||
| 532 |
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221 | if (source == NULL || source->write_mode) |
| 533 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 534 | |||
| 535 | 220 | return libmpq__reader_archive_clone(clone, source); | |
| 536 | } | ||
| 537 | |||
| 538 | /* | ||
| 539 | * Close the archive file and release all metadata tables allocated during archive open. | ||
| 540 | * Writer handles are finalized before their archive storage is freed, while | ||
| 541 | * reader-side cached block offsets are released entry by entry. | ||
| 542 | */ | ||
| 543 | int32_t | ||
| 544 | 2239 | libmpq__archive_close(mpq_archive_s *mpq_archive) | |
| 545 | { | ||
| 546 | uint32_t i; | ||
| 547 | 2239 | int32_t result = 0; | |
| 548 | |||
| 549 |
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2239 | if (mpq_archive == NULL) |
| 550 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 551 | |||
| 552 |
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2238 | if (mpq_archive->write_mode) { |
| 553 | |||
| 554 | /* Writer closure must serialize tables before releasing writer storage. */ | ||
| 555 | 618 | result = libmpq__writer_finalize(mpq_archive); | |
| 556 | 618 | libmpq__writer_file_abort(mpq_archive->write_current); | |
| 557 |
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618 | if (result == 0 && mpq_archive->write_mpqe) |
| 558 | 83 | result = libmpq__writer_finalize_mpqe(mpq_archive); | |
| 559 |
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618 | if (mpq_archive->fp != NULL && fclose(mpq_archive->fp) < 0 && result == 0) |
| 560 | ✗ | result = LIBMPQ_ERROR_CLOSE; | |
| 561 | 618 | libmpq__writer_mpqe_cleanup(mpq_archive); | |
| 562 | 618 | libmpq__rsa_clear( | |
| 563 | 618 | mpq_archive->write_signature_key, sizeof(mpq_archive->write_signature_key) | |
| 564 | ); | ||
| 565 | 618 | libmpq__rsa_clear( | |
| 566 | 618 | mpq_archive->write_strong_signature_key, sizeof(mpq_archive->write_strong_signature_key) | |
| 567 | ); | ||
| 568 |
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37433 | for (i = 0; i < mpq_archive->write_capacity; i++) |
| 569 |
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36815 | free(mpq_archive->write_names ? mpq_archive->write_names[i] : NULL); |
| 570 | 618 | free(mpq_archive->write_names); | |
| 571 | 618 | free(mpq_archive->write_locales); | |
| 572 | 618 | free(mpq_archive->write_platforms); | |
| 573 | 618 | libmpq__attributes_free(mpq_archive); | |
| 574 | 618 | free(mpq_archive->mpq_hash); | |
| 575 | 618 | free(mpq_archive->mpq_block); | |
| 576 | 618 | free(mpq_archive->mpq_block_ex); | |
| 577 | 618 | free(mpq_archive->filename); | |
| 578 | 618 | free(mpq_archive->write_mpqe_destination); | |
| 579 | 618 | free(mpq_archive->write_mpqe_output_path); | |
| 580 | 618 | free(mpq_archive); | |
| 581 | 618 | return result; | |
| 582 | } | ||
| 583 | |||
| 584 | 1620 | result = libmpq__source_close(mpq_archive->source); | |
| 585 | |||
| 586 |
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118652 | for (i = 0; i < mpq_archive->mpq_header.block_table_count; i++) { |
| 587 |
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117032 | if (mpq_archive->mpq_file[i] != NULL) { |
| 588 | ✗ | free(mpq_archive->mpq_file[i]->packed_offset); | |
| 589 | ✗ | free(mpq_archive->mpq_file[i]); | |
| 590 | } | ||
| 591 | } | ||
| 592 | |||
| 593 | 1620 | free(mpq_archive->mpq_map); | |
| 594 | 1620 | libmpq__attributes_free(mpq_archive); | |
| 595 | 1620 | free(mpq_archive->mpq_file); | |
| 596 | 1620 | free(mpq_archive->mpq_hash); | |
| 597 | 1620 | free(mpq_archive->mpq_block); | |
| 598 | 1620 | free(mpq_archive->mpq_block_ex); | |
| 599 | 1620 | free(mpq_archive->filename); | |
| 600 | 1620 | free(mpq_archive); | |
| 601 | |||
| 602 | 1620 | return result; | |
| 603 | } | ||
| 604 | |||
| 605 | /* | ||
| 606 | * Return the sum of packed sizes for all files in the archive block table. | ||
| 607 | * The caller supplies an accumulator, allowing this query to preserve the | ||
| 608 | * library's existing additive API behavior. | ||
| 609 | */ | ||
| 610 | int32_t | ||
| 611 | 1 | libmpq__archive_size_packed(mpq_archive_s *mpq_archive, libmpq__off_t *packed_size) | |
| 612 | { | ||
| 613 | |||
| 614 | /* Running total across all block-table entries. */ | ||
| 615 | uint32_t i; | ||
| 616 | |||
| 617 |
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7 | for (i = 0; i < mpq_archive->files; i++) { |
| 618 | 6 | *packed_size += | |
| 619 | 6 | mpq_archive->mpq_block[mpq_archive->mpq_map[i].block_table_indices].packed_size; | |
| 620 | } | ||
| 621 | |||
| 622 | 1 | return 0; | |
| 623 | } | ||
| 624 | |||
| 625 | /* | ||
| 626 | * Return the sum of unpacked sizes for all files in the archive block table. | ||
| 627 | * Only live public file-map entries are counted; unused block-table capacity | ||
| 628 | * does not contribute to the reported total. | ||
| 629 | */ | ||
| 630 | int32_t | ||
| 631 | 1 | libmpq__archive_size_unpacked(mpq_archive_s *mpq_archive, libmpq__off_t *unpacked_size) | |
| 632 | { | ||
| 633 | |||
| 634 | /* Running total across all block-table entries. */ | ||
| 635 | uint32_t i; | ||
| 636 | |||
| 637 |
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7 | for (i = 0; i < mpq_archive->files; i++) { |
| 638 | 6 | *unpacked_size += | |
| 639 | 6 | mpq_archive->mpq_block[mpq_archive->mpq_map[i].block_table_indices].unpacked_size; | |
| 640 | } | ||
| 641 | |||
| 642 | 1 | return 0; | |
| 643 | } | ||
| 644 | |||
| 645 | /* | ||
| 646 | * Return the byte offset where the MPQ archive starts in the backing file. | ||
| 647 | * Embedded archives therefore report their discovered start rather than zero. | ||
| 648 | */ | ||
| 649 | int32_t | ||
| 650 | 1 | libmpq__archive_offset(mpq_archive_s *mpq_archive, libmpq__off_t *offset) | |
| 651 | { | ||
| 652 | 1 | *offset = mpq_archive->archive_offset; | |
| 653 | |||
| 654 | 1 | return 0; | |
| 655 | } | ||
| 656 | |||
| 657 | /* | ||
| 658 | * Return the MPQ archive format version stored in the header. | ||
| 659 | * The internal zero-based version is converted to the public one-based API | ||
| 660 | * value before being written to the caller's output. | ||
| 661 | */ | ||
| 662 | int32_t | ||
| 663 | 7 | libmpq__archive_version(mpq_archive_s *mpq_archive, uint32_t *version) | |
| 664 | { | ||
| 665 | 7 | *version = mpq_archive->mpq_header.version + 1; | |
| 666 | |||
| 667 | 7 | return 0; | |
| 668 | } | ||
| 669 | |||
| 670 | /* | ||
| 671 | * Return the number of valid file entries discovered while opening the archive. | ||
| 672 | * This is the compact public count, not the reserved block-table capacity. | ||
| 673 | */ | ||
| 674 | int32_t | ||
| 675 | 73 | libmpq__archive_files(mpq_archive_s *mpq_archive, uint32_t *files) | |
| 676 | { | ||
| 677 | 73 | *files = mpq_archive->files; | |
| 678 | |||
| 679 | 73 | return 0; | |
| 680 | } | ||
| 681 | |||
| 682 | /* | ||
| 683 | * Return the packed size of a file entry by block-table number. | ||
| 684 | * The public file number is validated and translated through the compact map | ||
| 685 | * before reading the corresponding block-table entry. | ||
| 686 | */ | ||
| 687 | int32_t | ||
| 688 | 88 | libmpq__file_size_packed( | |
| 689 | mpq_archive_s *mpq_archive, uint32_t file_number, libmpq__off_t *packed_size | ||
| 690 | ) | ||
| 691 | { | ||
| 692 |
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88 | if (libmpq__reader_validate_file_number(mpq_archive, file_number) < 0) { |
| 693 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 694 | } | ||
| 695 | |||
| 696 | 87 | *packed_size = | |
| 697 | 87 | mpq_archive->mpq_block[mpq_archive->mpq_map[file_number].block_table_indices].packed_size; | |
| 698 | |||
| 699 | 87 | return 0; | |
| 700 | } | ||
| 701 | |||
| 702 | /* | ||
| 703 | * Return the unpacked size of a file entry by block-table number. | ||
| 704 | * Invalid compact file numbers are rejected before any archive metadata is | ||
| 705 | * accessed. | ||
| 706 | */ | ||
| 707 | int32_t | ||
| 708 | 10784 | libmpq__file_size_unpacked( | |
| 709 | mpq_archive_s *mpq_archive, uint32_t file_number, libmpq__off_t *unpacked_size | ||
| 710 | ) | ||
| 711 | { | ||
| 712 |
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10784 | if (libmpq__reader_validate_file_number(mpq_archive, file_number) < 0) { |
| 713 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 714 | } | ||
| 715 | |||
| 716 | 10783 | *unpacked_size = | |
| 717 | 10783 | mpq_archive->mpq_block[mpq_archive->mpq_map[file_number].block_table_indices].unpacked_size; | |
| 718 | |||
| 719 | 10783 | return 0; | |
| 720 | } | ||
| 721 | |||
| 722 | /* | ||
| 723 | * Return the file data offset relative to the start of the archive. | ||
| 724 | * MPQ v2 high offset words are combined with the legacy low word to produce | ||
| 725 | * the complete offset visible through the public API. | ||
| 726 | */ | ||
| 727 | int32_t | ||
| 728 | 3497 | libmpq__file_offset(mpq_archive_s *mpq_archive, uint32_t file_number, libmpq__off_t *offset) | |
| 729 | { | ||
| 730 |
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3497 | if (libmpq__reader_validate_file_number(mpq_archive, file_number) < 0) { |
| 731 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 732 | } | ||
| 733 | |||
| 734 | 3496 | *offset = mpq_archive->mpq_block[mpq_archive->mpq_map[file_number].block_table_indices].offset + | |
| 735 | 3496 | (((long long)mpq_archive | |
| 736 | 3496 | ->mpq_block_ex[mpq_archive->mpq_map[file_number].block_table_indices] | |
| 737 | 3496 | .offset_high) | |
| 738 | 3496 | << 32); | |
| 739 | |||
| 740 | 3496 | return 0; | |
| 741 | } | ||
| 742 | |||
| 743 | /* | ||
| 744 | * Return the number of blocks needed to store the selected file. | ||
| 745 | * The reader distinguishes single-unit files from sectorized entries and | ||
| 746 | * applies the archive sector size for the latter. | ||
| 747 | */ | ||
| 748 | int32_t | ||
| 749 | 4973 | libmpq__file_blocks(mpq_archive_s *mpq_archive, uint32_t file_number, uint32_t *blocks) | |
| 750 | { | ||
| 751 |
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4973 | if (libmpq__reader_validate_file_number(mpq_archive, file_number) < 0) { |
| 752 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 753 | } | ||
| 754 | |||
| 755 | 4972 | *blocks = libmpq__reader_count_file_blocks(mpq_archive, file_number); | |
| 756 | |||
| 757 | 4972 | return 0; | |
| 758 | } | ||
| 759 | |||
| 760 | /* Return stored block-table flags without reading or modifying payload data. */ | ||
| 761 | int32_t | ||
| 762 | 20893 | libmpq__file_flags(mpq_archive_s *archive, uint32_t file_number, uint32_t *flags) | |
| 763 | { | ||
| 764 |
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20893 | if (flags == NULL) |
| 765 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 766 | 20892 | *flags = 0; | |
| 767 |
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20892 | if (archive == NULL || libmpq__reader_validate_file_number(archive, file_number) < 0) |
| 768 | 2 | return LIBMPQ_ERROR_EXIST; | |
| 769 | |||
| 770 | 20890 | *flags = archive->mpq_block[archive->mpq_map[file_number].block_table_indices].flags; | |
| 771 | 20890 | return 0; | |
| 772 | } | ||
| 773 | |||
| 774 | /* | ||
| 775 | * Calculate the three Storm hashes used to identify an MPQ file name. | ||
| 776 | * Each output corresponds to a distinct hash-table phase used during MPQ | ||
| 777 | * name lookup and collision probing. | ||
| 778 | */ | ||
| 779 | void | ||
| 780 | 18207 | libmpq__file_hash(const char *filename, uint32_t *hash1, uint32_t *hash2, uint32_t *hash3) | |
| 781 | { | ||
| 782 | 18207 | *hash1 = libmpq__crypto_hash_string(filename, 0x0); | |
| 783 | 18207 | *hash2 = libmpq__crypto_hash_string(filename, 0x100); | |
| 784 | 18207 | *hash3 = libmpq__crypto_hash_string(filename, 0x200); | |
| 785 | 18207 | } | |
| 786 | |||
| 787 | /* | ||
| 788 | * Resolve a precomputed MPQ file-name hash to a public file number. | ||
| 789 | * The first hash selects a slot and linear probing continues until the stored | ||
| 790 | * pair matches or the table wraps without finding the file. | ||
| 791 | */ | ||
| 792 | int32_t | ||
| 793 | 10159 | libmpq__file_number_from_hash( | |
| 794 | mpq_archive_s *mpq_archive, uint32_t hash1, uint32_t hash2, uint32_t hash3, uint32_t *number | ||
| 795 | ) | ||
| 796 | { | ||
| 797 | |||
| 798 | /* Hash table probe state and archive hash-table size. */ | ||
| 799 | uint32_t i; | ||
| 800 | uint32_t ht_count; | ||
| 801 | uint32_t block_table_index; | ||
| 802 | |||
| 803 | 10159 | ht_count = mpq_archive->mpq_header.hash_table_count; | |
| 804 |
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10159 | if (ht_count == 0) { |
| 805 | ✗ | return LIBMPQ_ERROR_EXIST; | |
| 806 | } | ||
| 807 | |||
| 808 | 10159 | hash1 %= ht_count; | |
| 809 | |||
| 810 | /* The first hash selects the initial probe slot; collisions use linear probing. */ | ||
| 811 |
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12263 | for (i = hash1; mpq_archive->mpq_hash[i].block_table_index != LIBMPQ_HASH_FREE; |
| 812 | 2104 | i = (i + 1) % ht_count) { | |
| 813 |
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7318 | if (mpq_archive->mpq_hash[i].hash_a == hash2 && mpq_archive->mpq_hash[i].hash_b == hash3) { |
| 814 | 5214 | block_table_index = mpq_archive->mpq_hash[i].block_table_index; | |
| 815 |
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5214 | if (block_table_index >= mpq_archive->mpq_header.block_table_count || |
| 816 |
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5214 | (mpq_archive->mpq_block[block_table_index].flags & LIBMPQ_FLAG_EXISTS) == 0) { |
| 817 | ✗ | return LIBMPQ_ERROR_FORMAT; | |
| 818 | } | ||
| 819 | 5214 | *number = block_table_index - mpq_archive->mpq_map[block_table_index].block_table_diff; | |
| 820 |
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5214 | if (*number >= mpq_archive->files) { |
| 821 | ✗ | return LIBMPQ_ERROR_FORMAT; | |
| 822 | } | ||
| 823 | |||
| 824 | 5214 | return 0; | |
| 825 | } | ||
| 826 | |||
| 827 |
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2104 | if ((i + 1) % ht_count == hash1) { |
| 828 | ✗ | break; | |
| 829 | } | ||
| 830 | } | ||
| 831 | |||
| 832 | 4945 | return LIBMPQ_ERROR_EXIST; | |
| 833 | } | ||
| 834 | |||
| 835 | /* | ||
| 836 | * Resolve an MPQ file name to its block-table number through the hash table. | ||
| 837 | * The name is hashed with all three Storm phases before the collision-aware | ||
| 838 | * lookup is delegated to the precomputed-hash helper. | ||
| 839 | */ | ||
| 840 | int32_t | ||
| 841 | 10158 | libmpq__file_number(mpq_archive_s *mpq_archive, const char *filename, uint32_t *number) | |
| 842 | { | ||
| 843 | uint32_t hash1; | ||
| 844 | uint32_t hash2; | ||
| 845 | uint32_t hash3; | ||
| 846 | |||
| 847 | 10158 | libmpq__file_hash(filename, &hash1, &hash2, &hash3); | |
| 848 | 10158 | return libmpq__file_number_from_hash(mpq_archive, hash1, hash2, hash3, number); | |
| 849 | } | ||
| 850 | |||
| 851 | /* Complete reads scope their offset cache inside the reader. */ | ||
| 852 | int32_t | ||
| 853 | 3468 | libmpq__file_read( | |
| 854 | mpq_archive_s *archive, uint32_t number, uint8_t *buffer, libmpq__off_t size, | ||
| 855 | libmpq__off_t *transferred | ||
| 856 | ) | ||
| 857 | { | ||
| 858 | 3468 | return libmpq__reader_file_read(archive, number, buffer, size, transferred); | |
| 859 | } | ||
| 860 | |||
| 861 | int32_t | ||
| 862 | 7 | libmpq__stream_open(mpq_archive_s *archive, uint32_t file_number, mpq_stream_s **stream) | |
| 863 | { | ||
| 864 | 7 | return libmpq__reader_stream_open(archive, file_number, stream); | |
| 865 | } | ||
| 866 | |||
| 867 | int32_t | ||
| 868 | 94 | libmpq__stream_open_name(mpq_archive_s *archive, const char *filename, mpq_stream_s **stream) | |
| 869 | { | ||
| 870 | 94 | return libmpq__reader_stream_open_name(archive, filename, stream); | |
| 871 | } | ||
| 872 | |||
| 873 | int32_t | ||
| 874 | 606 | libmpq__stream_read( | |
| 875 | mpq_stream_s *stream, uint8_t *buffer, libmpq__off_t size, libmpq__off_t *transferred | ||
| 876 | ) | ||
| 877 | { | ||
| 878 | 606 | return libmpq__reader_stream_read(stream, buffer, size, transferred); | |
| 879 | } | ||
| 880 | |||
| 881 | int32_t | ||
| 882 | 30 | libmpq__stream_seek(mpq_stream_s *stream, libmpq__off_t offset, int32_t origin) | |
| 883 | { | ||
| 884 | 30 | return libmpq__reader_stream_seek(stream, offset, origin); | |
| 885 | } | ||
| 886 | |||
| 887 | int32_t | ||
| 888 | 17 | libmpq__stream_tell(mpq_stream_s *stream, libmpq__off_t *position) | |
| 889 | { | ||
| 890 | 17 | return libmpq__reader_stream_tell(stream, position); | |
| 891 | } | ||
| 892 | |||
| 893 | int32_t | ||
| 894 | 36 | libmpq__stream_size(mpq_stream_s *stream, libmpq__off_t *size) | |
| 895 | { | ||
| 896 | 36 | return libmpq__reader_stream_size(stream, size); | |
| 897 | } | ||
| 898 | |||
| 899 | int32_t | ||
| 900 | 100 | libmpq__stream_close(mpq_stream_s *stream) | |
| 901 | { | ||
| 902 | 100 | return libmpq__reader_stream_close(stream); | |
| 903 | } | ||
| 904 | |||
| 905 | /* | ||
| 906 | * Return one block's unpacked size directly from archive metadata. | ||
| 907 | * Full sectors use the archive sector size, while the final sector is reduced | ||
| 908 | * to the remaining file bytes and single-unit files use their full size. | ||
| 909 | */ | ||
| 910 | int32_t | ||
| 911 | 41289 | libmpq__block_size_unpacked( | |
| 912 | mpq_archive_s *mpq_archive, uint32_t file_number, uint32_t block_number, | ||
| 913 | libmpq__off_t *unpacked_size | ||
| 914 | ) | ||
| 915 | { | ||
| 916 |
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41289 | if (libmpq__reader_validate_file_number(mpq_archive, file_number) < 0) { |
| 917 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 918 | } | ||
| 919 | |||
| 920 |
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41288 | if (libmpq__reader_validate_block_number(mpq_archive, file_number, block_number) < 0) { |
| 921 | 1 | return LIBMPQ_ERROR_EXIST; | |
| 922 | } | ||
| 923 | |||
| 924 |
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41287 | if ((mpq_archive->mpq_block[mpq_archive->mpq_map[file_number].block_table_indices].flags & |
| 925 | LIBMPQ_FLAG_SINGLE) != 0) { | ||
| 926 | |||
| 927 | /* A single-unit entry has one logical block containing the whole file. */ | ||
| 928 | 2405 | *unpacked_size = | |
| 929 | 2405 | mpq_archive->mpq_block[mpq_archive->mpq_map[file_number].block_table_indices] | |
| 930 | 2405 | .unpacked_size; | |
| 931 | } | ||
| 932 | |||
| 933 |
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41287 | if ((mpq_archive->mpq_block[mpq_archive->mpq_map[file_number].block_table_indices].flags & |
| 934 | LIBMPQ_FLAG_SINGLE) == 0) { | ||
| 935 | |||
| 936 | /* Every non-final sector is full-sized; only the tail uses a remainder. */ | ||
| 937 |
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38882 | if (block_number < libmpq__reader_count_file_blocks(mpq_archive, file_number) - 1) { |
| 938 | 31899 | *unpacked_size = mpq_archive->block_size; | |
| 939 | } else { | ||
| 940 | 6983 | *unpacked_size = | |
| 941 | 6983 | mpq_archive->mpq_block[mpq_archive->mpq_map[file_number].block_table_indices] | |
| 942 | 6983 | .unpacked_size - | |
| 943 | 6983 | mpq_archive->block_size * block_number; | |
| 944 | } | ||
| 945 | } | ||
| 946 | |||
| 947 | 41287 | return 0; | |
| 948 | } | ||
| 949 | |||
| 950 | /* Query stored sector bytes through the reader's offset-table lifecycle. */ | ||
| 951 | int32_t | ||
| 952 | 877 | libmpq__block_size_packed( | |
| 953 | mpq_archive_s *archive, uint32_t file_number, uint32_t block_number, libmpq__off_t *packed_size | ||
| 954 | ) | ||
| 955 | { | ||
| 956 | 877 | return libmpq__reader_block_size_packed(archive, file_number, block_number, packed_size); | |
| 957 | } | ||
| 958 | |||
| 959 | /* Report the serialized method through the reader's packed-sector inspection. */ | ||
| 960 | int32_t | ||
| 961 | 890 | libmpq__block_compression( | |
| 962 | mpq_archive_s *archive, uint32_t file_number, uint32_t block_number, uint32_t *compression | ||
| 963 | ) | ||
| 964 | { | ||
| 965 | 890 | return libmpq__reader_block_compression(archive, file_number, block_number, compression); | |
| 966 | } | ||
| 967 | |||
| 968 | /* Normal block reads never enable explicit checksum verification. */ | ||
| 969 | int32_t | ||
| 970 | 10 | libmpq__block_read( | |
| 971 | mpq_archive_s *archive, uint32_t file_number, uint32_t block_number, uint8_t *out_buf, | ||
| 972 | libmpq__off_t out_size, libmpq__off_t *transferred | ||
| 973 | ) | ||
| 974 | { | ||
| 975 | 10 | return libmpq__reader_block_read( | |
| 976 | archive, file_number, block_number, out_buf, out_size, transferred, NULL, NULL, NULL | ||
| 977 | ); | ||
| 978 | } | ||
| 979 |