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feat(extract): swap RAR engine to unrar 7.20.1 (v1.9, v6/multi-volume)

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Replace the dmc_unrar 1.7.0 backend (third_party/unrar/) with the rarlab
UnRAR 7.20.1 source vendored in third_party/unrar7/ (commit c68c0de),
driven through its C-compatible DLL API.

Why: dmc_unrar only dispatches RAR5 compression version 5
(switch(file->version) case 0x5000). WinRAR 6.x/7.x archives (algorithm
"v6") land on the default branch -> DMC_UNRAR_FILE_UNSUPPORTED_VERSION
-> user-visible "corrupt archive", confirmed on a real v6:8M archive on
2026-09-05. unrar 7.20.1 natively handles v6, multi-volume (.partNN.rar
auto-merge) and encrypted archives.

Engine changes (src/rar_extract.c):
- Facade include swapped to third_party/unrar7/unrar_c_api.h; all calls
  now go through RAROpenArchiveEx/RARReadHeaderEx/RARProcessFile/
  RARCloseArchive. scan + extract each re-open the archive (the DLL API
  is sequential, unlike dmc's index-based access).
- Error translation rewritten for the ERAR_* code set.
- extract no longer builds each staging path by hand (open_parent_dirs/
  extract_one removed): unrar writes the whole tree under the staging
  root; names were validated during scan.
- Bug fix: normalize_name() cleared the caller-provided *is_dir (it set
  *is_dir = 0), turning directory entries into files and tripping the
  duplicate detector whenever an explicit directory header followed
  files beneath it (real v6 archive had exactly this). RHDF_DIRECTORY
  is now honored end to end.
- Encrypted RAR still fails up front (ZIPX_ERR_UNSUPPORTED): unrar can
  decrypt, but password plumbing (API/UI) lands in a later commit.

Build:
- Makefile: C++ compiler vars (CXX/HOST_CXX, prospero-clang++ defaults
  to -stdlib=libc++), unrar7 RARDLL source set (49 files, mirrors
  UnRARDll.vcxproj), .cpp pattern rules, link through the C++ driver.
- tests/run-tests.sh: compiles unrar7 objects with $CXX, links the RAR
  test with g++ and -lpowrprof on Windows.
- third_party/unrar/ (dmc_unrar) removed; see git history.

Verified on host (MinGW): full engine run on the user's real v6 archive
(24.9 MB, 170 headers) -> ZIPX_OK, 170/170 entries, 133 files + 37 dirs,
71,514,931 bytes. Host suite: 70 ZIP + 14 RAR checks green.

Frontend password/multi-volume UX and release plumbing (CHANGELOG,
THIRD_PARTY_NOTICES, README, tag) follow in the v1.9 release commit.
This commit is contained in:
Songlx516 committed 2026-09-05 22:40:58 +08:00
1 parent c68c0def35
commit a0482a41ed
10 files changed
+264 -12794
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third_party/unrar/COPYING
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third_party/unrar/README.md
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dmc_unrar README
================
dmc_unrar is a dependency-free, single-file FLOSS library for unpacking
and decompressing [RAR](https://en.wikipedia.org/wiki/RAR_(file_format))
archives. dmc_unrar is licensed under the terms of the [GNU General
Public License version 2](https://www.gnu.org/licenses/gpl-2.0.html) (or
later).
Please see dmc_unrar.c for details.
third_party/unrar/VENDORED.md
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# Vendored: dmc_unrar 1.7.0
## Source
- Repository: https://github.com/DrMcCoy/dmc_unrar
- Upstream commit: master @ 2026-09-05 (DRMcCoy/dmc_unrar master)
- Author: Sven Hesse (DrMcCoy) <drmccoy@drmccoy.de>
- License: GPL-2.0-or-later (see COPYING in this directory)
We vendor only the implementation source file `dmc_unrar.c` (11598 LOC, ~365 KiB).
The repository does not ship a separate header; the entire API is exposed
inline in the `.c` file (see top-of-file docstrings + `example.c`).
## What is supported
- RAR 1.5 / 2.0 / 2.6 / 2.9 / 3.0 / 3.6 / 4.0 / 5.0 archive formats
- Solid blocks, dictionary sizes up to 4 MiB (RAR4) / 32 MiB (RAR5)
- PPMd decompression (used by RAR 3.0+)
- Archive comments (ASCII / UTF-16LE)
- Encrypted archive/file *detection* (returns an explicit error)
## What is NOT supported (by upstream design)
- **Encrypted RAR files** — `DMC_UNRAR_(ARCHIVE|FILE)_UNSUPPORTED_ENCRYPTED`.
We surface this as `ZIPX_ERR_UNSUPPORTED` in the wrapper. Upstream
intentionally omits decryption to avoid patent complications.
- **Multi-volume (split) RAR archives** — `DMC_UNRAR_ARCHIVE_UNSUPPORTED_VOLUMES`.
We surface this as `ZIPX_ERR_UNSUPPORTED`. dmc_unrar does not chain
`.partNN.rar` siblings; users must join / unrar on a PC first.
- Symbolic links, FIFOs, sockets, devices — `DMC_UNRAR_FILE_UNSUPPORTED_LINK`.
## Why dmc_unrar and not the upstream rarlab UnRAR
The rarlab UnRAR source tree (https://www.rarlab.com/rar/unrarsrc-*.tar.gz,
mirrored at https://github.com/opello/unrar) supports encrypted and
multi-volume archives, but it is a 150-file C++17 codebase with its own
filesystem abstraction, Windows registry probe, and threading pool that
requires `-DRAR_SMP`. Integrating it cleanly into the PS5 toolchain would
need:
1. A separate CXX linker step in the Makefile.
2. Verification that `prospero-clang` (-std=c++17, freestanding) builds it
without libc++ dependencies beyond what `prospero-pkg-config` exposes.
3. A new exit-error contract for the `--strip` toolchain.
4. ~10× the audit surface (every `#include <windows.h>` etc.).
We decided the cost > benefit for v1.8: single-volume RAR is the dominant
PS5 Web File Manager use case (uploading an unzipped payload, dumping a
single .pkg as `.rar` for transfer). Users needing multi-volume /
encrypted RAR are explicitly informed via the web UI error message that
they should extract on a PC first.
## Upgrading to a fuller library (v1.9 plan)
When (if) demand justifies it, the recommended upgrade path is:
1. Vendor `https://github.com/opello/unrar` (a faithful mirror of rarlab's
UnRAR 7.x) into `third_party/unrar/` (replacing dmc_unrar.c).
2. Add a CXX compilation rule in `Makefile`:
```
THIRD_PARTY_CPP_SRCS := $(wildcard third_party/unrar/*.cpp)
PS5_TP_CPP_OBJS := $(patsubst %.cpp,ps5-obj/%.o,$(THIRD_PARTY_CPP_SRCS))
$(BIN): ... $(PS5_TP_CPP_OBJS)
$(CXX) -o $@ ... $(PS5_TP_CPP_OBJS) ...
```
3. Build dmc_unrar-style driver code against the DLL API
(`-DRARDLL`, link via `dll.cpp`). The RAR API entry points
`RAROpenArchiveEx`, `RARReadHeaderEx`, `RARProcessFileW` accept the
password via `RARSetPassword`.
4. Rewrite `src/rar_extract.c` to call the new engine while preserving
the `rar_extract()` signature and the `zipx_status_t` error mapping.
5. Tests in `tests/test_rar_extract.c` should not need to change — only
the engine behind `rar_extract()`.
## Modifications to dmc_unrar.c
None. We pin the upstream file verbatim to keep the upgrade path trivial.
third_party/unrar/dmc_unrar.c
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third_party/unrar/dmc_unrar_api.h
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/* Facade header for dmc_unrar 1.7.0 (vendored at third_party/unrar/dmc_unrar.c).
*
* This file declares only the dmc_unrar entry points that src/rar_extract.c
* actually uses. It exists so that rar_extract.c does NOT have to
* `#include "dmc_unrar.c"` — that would otherwise pull the entire library
* into the same translation unit, where the host test build's
* tests/posix_compat.h renames `open` / `close` to `wfm_open` / `wfm_close`
* and breaks dmc_unrar's `dmc_unrar_io_handler` struct member access.
*
* On the PS5 the build (Makefile) compiles dmc_unrar.c separately into
* `ps5-obj/.../dmc_unrar.o` and links it with the rest. On the host test
* runner, `tests/run-tests.sh` does the same with `dmc_unrar.o` (built
* without the POSIX compat shim) and `rar_extract.o` (built with it). */
#pragma once
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif
/* DMC_UNRAR_SIZE_T and DMC_UNRAR_OFFSET_T are normally typedef'd by
dmc_unrar.c. Mirror them here so consumers do not need to include it. */
#ifndef DMC_UNRAR_SIZE_T
typedef uint64_t dmc_unrar_size_t;
typedef int64_t dmc_unrar_offset_t;
#endif
typedef enum {
DMC_UNRAR_OK = 0,
DMC_UNRAR_NO_ALLOC,
DMC_UNRAR_ALLOC_FAIL,
DMC_UNRAR_OPEN_FAIL,
DMC_UNRAR_READ_FAIL,
DMC_UNRAR_WRITE_FAIL,
DMC_UNRAR_SEEK_FAIL,
DMC_UNRAR_INVALID_DATA,
DMC_UNRAR_ARCHIVE_EMPTY,
DMC_UNRAR_ARCHIVE_IS_NULL,
DMC_UNRAR_ARCHIVE_NOT_CLEARED,
DMC_UNRAR_ARCHIVE_MISSING_FIELDS,
DMC_UNRAR_ARCHIVE_NOT_RAR,
DMC_UNRAR_ARCHIVE_UNSUPPORTED_ANCIENT,
DMC_UNRAR_ARCHIVE_UNSUPPORTED_VOLUMES,
DMC_UNRAR_ARCHIVE_UNSUPPORTED_ENCRYPTED,
DMC_UNRAR_FILE_IS_INVALID,
DMC_UNRAR_FILE_IS_DIRECTORY,
DMC_UNRAR_FILE_SOLID_BROKEN,
DMC_UNRAR_FILE_CRC32_FAIL,
DMC_UNRAR_FILE_UNSUPPORTED_VERSION,
DMC_UNRAR_FILE_UNSUPPORTED_METHOD,
DMC_UNRAR_FILE_UNSUPPORTED_ENCRYPTED,
DMC_UNRAR_FILE_UNSUPPORTED_SPLIT,
DMC_UNRAR_FILE_UNSUPPORTED_LINK,
DMC_UNRAR_FILE_UNSUPPORTED_LARGE
/* Values after DMC_UNRAR_FILE_UNSUPPORTED_LARGE (HUFF_*, PPMD_*, FILTERS_*,
*_DISABLED_FEATURE_*, RAR15/20/30/50 specific codes) are intentionally
omitted — rar_extract.c only translates the codes it knows about and
groups the rest into ZIPX_ERR_FORMAT via the default case. */
} dmc_unrar_return;
typedef enum {
DMC_UNRAR_HOSTOS_DOS = 0,
DMC_UNRAR_HOSTOS_OS2 = 1,
DMC_UNRAR_HOSTOS_WIN32 = 2,
DMC_UNRAR_HOSTOS_UNIX = 3,
DMC_UNRAR_HOSTOS_MACOS = 4,
DMC_UNRAR_HOSTOS_BEOS = 5
} dmc_unrar_host_os;
typedef struct dmc_unrar_file_tag {
uint64_t compressed_size;
uint64_t uncompressed_size;
dmc_unrar_host_os host_os;
bool has_crc;
uint32_t crc;
uint64_t unix_time;
uint64_t attrs;
} dmc_unrar_file;
/* dmc_unrar_archive is an opaque struct in the vendored library. We expose
it here so callers can stack-allocate one and pass &rar to the API. The
field list is *not* required — the dmc_unrar API treats the struct as a
token, but we need a complete type so callers can declare it as a local
variable. The layout is irrelevant because the dmc_unrar API only uses
pointers and the real definition lives inside dmc_unrar.c. */
typedef struct dmc_unrar_archive_tag {
void *alloc;
void *io;
void *internal_state;
} dmc_unrar_archive;
const char *dmc_unrar_strerror(dmc_unrar_return code);
bool dmc_unrar_is_rar_path(const char *path);
dmc_unrar_return dmc_unrar_archive_init(dmc_unrar_archive *archive);
void dmc_unrar_archive_close(dmc_unrar_archive *archive);
dmc_unrar_return dmc_unrar_archive_open_path(dmc_unrar_archive *archive,
const char *path);
dmc_unrar_size_t dmc_unrar_get_file_count(dmc_unrar_archive *archive);
const dmc_unrar_file *dmc_unrar_get_file_stat(dmc_unrar_archive *archive,
dmc_unrar_size_t index);
dmc_unrar_size_t dmc_unrar_get_filename(dmc_unrar_archive *archive,
dmc_unrar_size_t index,
char *filename,
dmc_unrar_size_t filename_size);
bool dmc_unrar_file_is_directory(dmc_unrar_archive *archive,
dmc_unrar_size_t index);
dmc_unrar_return dmc_unrar_file_is_supported(dmc_unrar_archive *archive,
dmc_unrar_size_t index);
bool dmc_unrar_unicode_make_valid_utf8(char *str);
dmc_unrar_return dmc_unrar_extract_file_to_path(dmc_unrar_archive *archive,
dmc_unrar_size_t index,
const char *path,
dmc_unrar_size_t *uncompressed_size,
bool validate_crc);
#ifdef __cplusplus
}
#endif
third_party/unrar/example.c
Vendored
-239
View File
@@ -1,239 +0,0 @@
/* dmc_unrar - A dependency-free, single-file FLOSS unrar library
*
* Copyright (c) 2017 by Sven Hesse (DrMcCoy) <drmccoy@drmccoy.de>
*
* dmc_unrar is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation, either version 2 of
* the License, or (at your option) any later version.
*
* dmc_unrar is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* For the full text of the GNU General Public License version 2,
* see <https://www.gnu.org/licenses/gpl-2.0.html>
*/
/* This is a small example program to show how to use dmc_unrar. */
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <stdio.h>
#include "dmc_unrar.c"
int display_help(const char *name);
int display_error(const char *where, const char *str);
char get_command(const char *param);
const char *get_archive_comment(dmc_unrar_archive *archive);
const char *get_file_comment(dmc_unrar_archive *archive, dmc_unrar_size_t i);
const char *get_filename(dmc_unrar_archive *archive, dmc_unrar_size_t i);
const char *get_filename_no_directory(const char *filename);
int main(int argc, char **argv) {
dmc_unrar_size_t i;
char cmd;
const char *comment = NULL;
dmc_unrar_archive archive;
dmc_unrar_return return_code;
if (argc < 3)
return display_help(argv[0]);
cmd = get_command(argv[1]);
if (cmd == 0)
return display_help(argv[0]);
if (!dmc_unrar_is_rar_path(argv[2]))
return display_help(argv[0]);
return_code = dmc_unrar_archive_init(&archive);
if (return_code != DMC_UNRAR_OK)
return display_error("Clear", dmc_unrar_strerror(return_code));
return_code = dmc_unrar_archive_open_path(&archive, argv[2]);
if (return_code != DMC_UNRAR_OK)
return display_error("Open", dmc_unrar_strerror(return_code));
comment = get_archive_comment(&archive);
if (comment) {
printf(".--- Archive comment:\n");
printf("%s\n", comment);
printf("'---\n\n");
free((char *)comment);
}
for (i = 0; i < dmc_unrar_get_file_count(&archive); i++) {
const char *name = get_filename(&archive, i), *file_comment = NULL;
const dmc_unrar_file *file = dmc_unrar_get_file_stat(&archive, i);
printf("%u/%u: \"%s\" - %llu bytes\n",
(unsigned int)(i+1), (unsigned int)dmc_unrar_get_file_count(&archive),
name ? name : "", file ? (unsigned long long)file->uncompressed_size : (unsigned long long)0);
file_comment = get_file_comment(&archive, i);
if (file_comment) {
printf(".--- File comment:\n");
printf("%s\n", file_comment);
printf("'---\n\n");
free((char *)file_comment);
}
if (cmd == 'e') {
const char *filename = get_filename_no_directory(name);
if (filename && !dmc_unrar_file_is_directory(&archive, i)) {
dmc_unrar_return supported = dmc_unrar_file_is_supported(&archive, i);
if (supported == DMC_UNRAR_OK) {
dmc_unrar_return extracted = dmc_unrar_extract_file_to_path(&archive, i, filename, NULL, true);
if (extracted != DMC_UNRAR_OK)
fprintf(stderr, "Error: %s\n", dmc_unrar_strerror(extracted));
} else
fprintf(stderr, "Not supported: %s\n", dmc_unrar_strerror(supported));
}
}
free((char *)name);
}
dmc_unrar_archive_close(&archive);
return 0;
}
int display_help(const char *name) {
fprintf(stderr, "dmc_unrar - A dependency-free, single-file FLOSS unrar library\n");
fprintf(stderr, "\n");
fprintf(stderr, "Usage: %s <command> <rarfile>\n", name);
fprintf(stderr, "\n");
fprintf(stderr, "Commands:\n");
fprintf(stderr, " l List RAR archive contents\n");
fprintf(stderr, " e Extract RAR archive to current directory\n");
fprintf(stderr, "\n");
return 1;
}
int display_error(const char *where, const char *str) {
fprintf(stderr, "%s failed: %s\n", where, str);
return 1;
}
char get_command(const char *param) {
char cmd;
if (!param || (param[0] == '\0') || (param[1] != '\0'))
return 0;
cmd = param[0];
if ((cmd != 'l') && (cmd != 'e'))
return 0;
return cmd;
}
static const char *convert_comment(uint8_t *data, dmc_unrar_size_t size) {
const dmc_unrar_unicode_encoding encoding = dmc_unrar_unicode_detect_encoding(data, size);
if (encoding == DMC_UNRAR_UNICODE_ENCODING_UTF8) {
data[size] = '\0';
return (const char *)data;
}
if (encoding == DMC_UNRAR_UNICODE_ENCODING_UTF16LE) {
char *utf8_data = NULL;
dmc_unrar_size_t utf8_size = dmc_unrar_unicode_convert_utf16le_to_utf8(data, size, NULL, 0);
if (utf8_size) {
utf8_data = (char *)malloc(utf8_size);
if (utf8_data) {
utf8_size = dmc_unrar_unicode_convert_utf16le_to_utf8(data, size, utf8_data, utf8_size);
if (utf8_size) {
free(data);
return utf8_data;
}
}
}
free(data);
free(utf8_data);
return NULL;
}
free(data);
return NULL;
}
const char *get_archive_comment(dmc_unrar_archive *archive) {
uint8_t *data = NULL;
dmc_unrar_size_t size = dmc_unrar_get_archive_comment(archive, NULL, 0);
if (!size)
return NULL;
data = (uint8_t *)malloc(size + 1);
if (!data)
return NULL;
size = dmc_unrar_get_archive_comment(archive, data, size);
return convert_comment(data, size);
}
const char *get_file_comment(dmc_unrar_archive *archive, dmc_unrar_size_t i) {
uint8_t *data = NULL;
dmc_unrar_size_t size = dmc_unrar_get_file_comment(archive, i, NULL, 0);
if (!size)
return NULL;
data = (uint8_t *)malloc(size + 1);
if (!data)
return NULL;
size = dmc_unrar_get_file_comment(archive, i, data, size);
return convert_comment(data, size);
}
const char *get_filename(dmc_unrar_archive *archive, dmc_unrar_size_t i) {
char *filename = 0;
dmc_unrar_size_t size = dmc_unrar_get_filename(archive, i, NULL, 0);
if (!size)
return NULL;
filename = (char *)malloc(size);
if (!filename)
return NULL;
size = dmc_unrar_get_filename(archive, i, filename, size);
if (!size) {
free(filename);
return NULL;
}
dmc_unrar_unicode_make_valid_utf8(filename);
if (filename[0] == '\0') {
free(filename);
return NULL;
}
return filename;
}
const char *get_filename_no_directory(const char *filename) {
char *p = NULL;
if (!filename)
return NULL;
p = (char *) strrchr(filename, '/');
if (!p)
return filename;
if (p[1] == '\0')
return NULL;
return p + 1;
}