From 61e5bcef2629e2d68b805a956a96fff264d4f74d Mon Sep 17 00:00:00 2001 From: untodesu Date: Sat, 28 Jun 2025 01:59:49 +0500 Subject: Restructure dependencies and update to C++20 - Nuked static_assert from almost everywhere in the project - Nuked binary dependency support. Might add one later though - Separated dependency headers into a separate include subdirectory - Grafted a thirdpartylegalnotices.txt generator from RITEG - Pushed development snapshot version to 2126 (26th week of 2025) --- deps/physfs/src/physfs_archiver_hog.c | 170 ++++++++++++++++++++++++++++++++++ 1 file changed, 170 insertions(+) create mode 100644 deps/physfs/src/physfs_archiver_hog.c (limited to 'deps/physfs/src/physfs_archiver_hog.c') diff --git a/deps/physfs/src/physfs_archiver_hog.c b/deps/physfs/src/physfs_archiver_hog.c new file mode 100644 index 0000000..a818478 --- /dev/null +++ b/deps/physfs/src/physfs_archiver_hog.c @@ -0,0 +1,170 @@ +/* + * HOG support routines for PhysicsFS. + * + * This driver handles Descent I/II/III HOG archives. + * + * The Descent I/II format is very simple: + * + * The file always starts with the 3-byte signature "DHF" (Descent + * HOG file). After that the files of a HOG are just attached after + * another, divided by a 17 bytes header, which specifies the name + * and length (in bytes) of the forthcoming file! So you just read + * the header with its information of how big the following file is, + * and then skip exact that number of bytes to get to the next file + * in that HOG. + * + * char sig[3] = {'D', 'H', 'F'}; // "DHF"=Descent HOG File + * + * struct { + * char file_name[13]; // Filename, padded to 13 bytes with 0s + * int file_size; // filesize in bytes + * char data[file_size]; // The file data + * } FILE_STRUCT; // Repeated until the end of the file. + * + * (That info is from http://www.descent2.com/ddn/specs/hog/) + * + * Descent 3 moved to HOG2 format, which starts with the chars "HOG2", + * then 32-bits for the number of contained files, 32 bits for the offset + * to the first file's data, then 56 bytes of 0xFF (reserved?). Then for + * each file, there's 36 bytes for filename (null-terminated, rest of bytes + * are garbage), 32-bits unknown/reserved (always zero?), 32-bits of length + * of file data, 32-bits of time since Unix epoch. Then immediately following, + * for each file is their uncompressed content, you can find its offset + * by starting at the initial data offset and adding the filesize of each + * prior file. + * + * This information was found at: + * https://web.archive.org/web/20020213004051/http://descent-3.com/ddn/specs/hog/ + * + * + * Please see the file LICENSE.txt in the source's root directory. + * + * This file written by Bradley Bell and Ryan C. Gordon. + */ + +#define __PHYSICSFS_INTERNAL__ +#include "physfs_internal.h" + +#if PHYSFS_SUPPORTS_HOG + +static int readui32(PHYSFS_Io *io, PHYSFS_uint32 *val) +{ + PHYSFS_uint32 v; + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, &v, sizeof (v)), 0); + *val = PHYSFS_swapULE32(v); + return 1; +} /* readui32 */ + +static int hog1LoadEntries(PHYSFS_Io *io, void *arc) +{ + const PHYSFS_uint64 iolen = io->length(io); + PHYSFS_uint32 pos = 3; + + while (pos < iolen) + { + PHYSFS_uint32 size; + char name[13]; + + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, name, 13), 0); + BAIL_IF_ERRPASS(!readui32(io, &size), 0); + name[12] = '\0'; /* just in case. */ + pos += 13 + 4; + + BAIL_IF_ERRPASS(!UNPK_addEntry(arc, name, 0, -1, -1, pos, size), 0); + pos += size; + + /* skip over entry */ + BAIL_IF_ERRPASS(!io->seek(io, pos), 0); + } /* while */ + + return 1; +} /* hogLoadEntries */ + +static int hog2LoadEntries(PHYSFS_Io *io, void *arc) +{ + PHYSFS_uint32 numfiles; + PHYSFS_uint32 pos; + PHYSFS_uint32 i; + + BAIL_IF_ERRPASS(!readui32(io, &numfiles), 0); + BAIL_IF_ERRPASS(!readui32(io, &pos), 0); + BAIL_IF_ERRPASS(!io->seek(io, 68), 0); /* skip to end of header. */ + + for (i = 0; i < numfiles; i++) { + char name[37]; + PHYSFS_uint32 reserved; + PHYSFS_uint32 size; + PHYSFS_uint32 mtime; + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, name, 36), 0); + BAIL_IF_ERRPASS(!readui32(io, &reserved), 0); + BAIL_IF_ERRPASS(!readui32(io, &size), 0); + BAIL_IF_ERRPASS(!readui32(io, &mtime), 0); + name[36] = '\0'; /* just in case */ + BAIL_IF_ERRPASS(!UNPK_addEntry(arc, name, 0, mtime, mtime, pos, size), 0); + pos += size; + } + + return 1; +} /* hog2LoadEntries */ + + +static void *HOG_openArchive(PHYSFS_Io *io, const char *name, + int forWriting, int *claimed) +{ + PHYSFS_uint8 buf[3]; + void *unpkarc = NULL; + int hog1 = 0; + + assert(io != NULL); /* shouldn't ever happen. */ + BAIL_IF(forWriting, PHYSFS_ERR_READ_ONLY, NULL); + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, buf, 3), NULL); + + if (memcmp(buf, "DHF", 3) == 0) + hog1 = 1; /* original HOG (Descent 1 and 2) archive */ + else + { + BAIL_IF(memcmp(buf, "HOG", 3) != 0, PHYSFS_ERR_UNSUPPORTED, NULL); /* Not HOG2 */ + BAIL_IF_ERRPASS(!__PHYSFS_readAll(io, buf, 1), NULL); + BAIL_IF(buf[0] != '2', PHYSFS_ERR_UNSUPPORTED, NULL); /* Not HOG2 */ + } /* else */ + + *claimed = 1; + + unpkarc = UNPK_openArchive(io, 0, 1); + BAIL_IF_ERRPASS(!unpkarc, NULL); + + if (!(hog1 ? hog1LoadEntries(io, unpkarc) : hog2LoadEntries(io, unpkarc))) + { + UNPK_abandonArchive(unpkarc); + return NULL; + } /* if */ + + return unpkarc; +} /* HOG_openArchive */ + + +const PHYSFS_Archiver __PHYSFS_Archiver_HOG = +{ + CURRENT_PHYSFS_ARCHIVER_API_VERSION, + { + "HOG", + "Descent I/II/III HOG file format", + "Bradley Bell ", + "https://icculus.org/physfs/", + 0, /* supportsSymlinks */ + }, + HOG_openArchive, + UNPK_enumerate, + UNPK_openRead, + UNPK_openWrite, + UNPK_openAppend, + UNPK_remove, + UNPK_mkdir, + UNPK_stat, + UNPK_closeArchive +}; + +#endif /* defined PHYSFS_SUPPORTS_HOG */ + +/* end of physfs_archiver_hog.c ... */ + -- cgit