7768
+ − 1 /*
+ − 2 * MVL support routines for PhysicsFS.
+ − 3 *
+ − 4 * This driver handles Descent II Movielib archives.
+ − 5 *
+ − 6 * The file format of MVL is quite easy...
+ − 7 *
+ − 8 * //MVL File format - Written by Heiko Herrmann
+ − 9 * char sig[4] = {'D','M', 'V', 'L'}; // "DMVL"=Descent MoVie Library
+ − 10 *
+ − 11 * int num_files; // the number of files in this MVL
+ − 12 *
+ − 13 * struct {
+ − 14 * char file_name[13]; // Filename, padded to 13 bytes with 0s
+ − 15 * int file_size; // filesize in bytes
+ − 16 * }DIR_STRUCT[num_files];
+ − 17 *
+ − 18 * struct {
+ − 19 * char data[file_size]; // The file data
+ − 20 * }FILE_STRUCT[num_files];
+ − 21 *
+ − 22 * (That info is from http://www.descent2.com/ddn/specs/mvl/)
+ − 23 *
+ − 24 * Please see the file LICENSE.txt in the source's root directory.
+ − 25 *
+ − 26 * This file written by Bradley Bell.
+ − 27 * Based on grp.c by Ryan C. Gordon.
+ − 28 */
+ − 29
+ − 30 #define __PHYSICSFS_INTERNAL__
+ − 31 #include "physfs_internal.h"
+ − 32
+ − 33 #if PHYSFS_SUPPORTS_MVL
+ − 34
+ − 35 static UNPKentry *mvlLoadEntries(PHYSFS_Io *io, PHYSFS_uint32 fileCount)
+ − 36 {
+ − 37 PHYSFS_uint32 location = 8; /* sizeof sig. */
+ − 38 UNPKentry *entries = NULL;
+ − 39 UNPKentry *entry = NULL;
+ − 40
+ − 41 entries = (UNPKentry *) allocator.Malloc(sizeof (UNPKentry) * fileCount);
+ − 42 BAIL_IF_MACRO(entries == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
+ − 43
+ − 44 location += (17 * fileCount);
+ − 45
+ − 46 for (entry = entries; fileCount > 0; fileCount--, entry++)
+ − 47 {
+ − 48 if (!__PHYSFS_readAll(io, &entry->name, 13)) goto failed;
+ − 49 if (!__PHYSFS_readAll(io, &entry->size, 4)) goto failed;
+ − 50 entry->size = PHYSFS_swapULE32(entry->size);
+ − 51 entry->startPos = location;
+ − 52 location += entry->size;
+ − 53 } /* for */
+ − 54
+ − 55 return entries;
+ − 56
+ − 57 failed:
+ − 58 allocator.Free(entries);
+ − 59 return NULL;
+ − 60 } /* mvlLoadEntries */
+ − 61
+ − 62
+ − 63 static void *MVL_openArchive(PHYSFS_Io *io, const char *name, int forWriting)
+ − 64 {
+ − 65 PHYSFS_uint8 buf[4];
+ − 66 PHYSFS_uint32 count = 0;
+ − 67 UNPKentry *entries = NULL;
+ − 68
+ − 69 assert(io != NULL); /* shouldn't ever happen. */
+ − 70 BAIL_IF_MACRO(forWriting, PHYSFS_ERR_READ_ONLY, NULL);
+ − 71 BAIL_IF_MACRO(!__PHYSFS_readAll(io, buf, 4), ERRPASS, NULL);
+ − 72 BAIL_IF_MACRO(memcmp(buf, "DMVL", 4) != 0, PHYSFS_ERR_UNSUPPORTED, NULL);
+ − 73 BAIL_IF_MACRO(!__PHYSFS_readAll(io, &count, sizeof(count)), ERRPASS, NULL);
+ − 74
+ − 75 count = PHYSFS_swapULE32(count);
+ − 76 entries = mvlLoadEntries(io, count);
+ − 77 return (!entries) ? NULL : UNPK_openArchive(io, entries, count);
+ − 78 } /* MVL_openArchive */
+ − 79
+ − 80
+ − 81 const PHYSFS_Archiver __PHYSFS_Archiver_MVL =
+ − 82 {
+ − 83 {
+ − 84 "MVL",
+ − 85 "Descent II Movielib format",
+ − 86 "Bradley Bell <btb@icculus.org>",
+ − 87 "http://icculus.org/physfs/",
+ − 88 },
+ − 89 MVL_openArchive, /* openArchive() method */
+ − 90 UNPK_enumerateFiles, /* enumerateFiles() method */
+ − 91 UNPK_openRead, /* openRead() method */
+ − 92 UNPK_openWrite, /* openWrite() method */
+ − 93 UNPK_openAppend, /* openAppend() method */
+ − 94 UNPK_remove, /* remove() method */
+ − 95 UNPK_mkdir, /* mkdir() method */
+ − 96 UNPK_closeArchive, /* closeArchive() method */
+ − 97 UNPK_stat /* stat() method */
+ − 98 };
+ − 99
+ − 100 #endif /* defined PHYSFS_SUPPORTS_MVL */
+ − 101
+ − 102 /* end of mvl.c ... */
+ − 103