1 /* |
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2 * QPAK support routines for PhysicsFS. |
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3 * |
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4 * This archiver handles the archive format utilized by Quake 1 and 2. |
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5 * Quake3-based games use the PkZip/Info-Zip format (which our zip.c |
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6 * archiver handles). |
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7 * |
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8 * ======================================================================== |
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9 * |
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10 * This format info (in more detail) comes from: |
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11 * http://debian.fmi.uni-sofia.bg/~sergei/cgsr/docs/pak.txt |
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12 * |
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13 * Quake PAK Format |
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14 * |
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15 * Header |
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16 * (4 bytes) signature = 'PACK' |
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17 * (4 bytes) directory offset |
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18 * (4 bytes) directory length |
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19 * |
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20 * Directory |
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21 * (56 bytes) file name |
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22 * (4 bytes) file position |
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23 * (4 bytes) file length |
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24 * |
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25 * ======================================================================== |
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26 * |
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27 * Please see the file LICENSE.txt in the source's root directory. |
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28 * |
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29 * This file written by Ryan C. Gordon. |
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30 */ |
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31 |
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32 #define __PHYSICSFS_INTERNAL__ |
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33 #include "physfs_internal.h" |
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34 |
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35 #if PHYSFS_SUPPORTS_QPAK |
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36 |
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37 #define QPAK_SIG 0x4B434150 /* "PACK" in ASCII. */ |
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38 |
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39 static UNPKentry *qpakLoadEntries(PHYSFS_Io *io, PHYSFS_uint32 fileCount) |
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40 { |
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41 UNPKentry *entries = NULL; |
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42 UNPKentry *entry = NULL; |
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43 |
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44 entries = (UNPKentry *) allocator.Malloc(sizeof (UNPKentry) * fileCount); |
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45 BAIL_IF_MACRO(entries == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL); |
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46 |
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47 for (entry = entries; fileCount > 0; fileCount--, entry++) |
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48 { |
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49 if (!__PHYSFS_readAll(io, &entry->name, 56)) goto failed; |
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50 if (!__PHYSFS_readAll(io, &entry->startPos, 4)) goto failed; |
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51 if (!__PHYSFS_readAll(io, &entry->size, 4)) goto failed; |
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52 entry->size = PHYSFS_swapULE32(entry->size); |
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53 entry->startPos = PHYSFS_swapULE32(entry->startPos); |
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54 } /* for */ |
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55 |
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56 return entries; |
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57 |
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58 failed: |
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59 allocator.Free(entries); |
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60 return NULL; |
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61 } /* qpakLoadEntries */ |
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62 |
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63 |
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64 static void *QPAK_openArchive(PHYSFS_Io *io, const char *name, int forWriting) |
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65 { |
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66 UNPKentry *entries = NULL; |
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67 PHYSFS_uint32 val = 0; |
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68 PHYSFS_uint32 pos = 0; |
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69 PHYSFS_uint32 count = 0; |
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70 |
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71 assert(io != NULL); /* shouldn't ever happen. */ |
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72 |
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73 BAIL_IF_MACRO(forWriting, PHYSFS_ERR_READ_ONLY, NULL); |
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74 |
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75 BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL); |
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76 if (PHYSFS_swapULE32(val) != QPAK_SIG) |
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77 BAIL_MACRO(PHYSFS_ERR_UNSUPPORTED, NULL); |
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78 |
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79 BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL); |
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80 pos = PHYSFS_swapULE32(val); /* directory table offset. */ |
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81 |
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82 BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL); |
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83 count = PHYSFS_swapULE32(val); |
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84 |
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85 /* corrupted archive? */ |
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86 BAIL_IF_MACRO((count % 64) != 0, PHYSFS_ERR_CORRUPT, NULL); |
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87 count /= 64; |
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88 |
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89 BAIL_IF_MACRO(!io->seek(io, pos), ERRPASS, NULL); |
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90 |
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91 entries = qpakLoadEntries(io, count); |
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92 BAIL_IF_MACRO(!entries, ERRPASS, NULL); |
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93 return UNPK_openArchive(io, entries, count); |
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94 } /* QPAK_openArchive */ |
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95 |
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96 |
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97 const PHYSFS_Archiver __PHYSFS_Archiver_QPAK = |
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98 { |
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99 { |
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100 "PAK", |
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101 "Quake I/II format", |
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102 "Ryan C. Gordon <icculus@icculus.org>", |
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103 "http://icculus.org/physfs/", |
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104 }, |
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105 QPAK_openArchive, /* openArchive() method */ |
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106 UNPK_enumerateFiles, /* enumerateFiles() method */ |
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107 UNPK_openRead, /* openRead() method */ |
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108 UNPK_openWrite, /* openWrite() method */ |
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109 UNPK_openAppend, /* openAppend() method */ |
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110 UNPK_remove, /* remove() method */ |
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111 UNPK_mkdir, /* mkdir() method */ |
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112 UNPK_closeArchive, /* closeArchive() method */ |
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113 UNPK_stat /* stat() method */ |
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114 }; |
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115 |
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116 #endif /* defined PHYSFS_SUPPORTS_QPAK */ |
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117 |
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118 /* end of qpak.c ... */ |
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119 |
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