misc/libphysfs/archiver_wad.c
author koda
Wed, 08 Jan 2014 19:19:09 +0100
changeset 9959 1a42d36f346a
parent 8524 a65e9bcf0a03
child 10017 de822cd3df3a
permissions -rw-r--r--
use mainstream project name
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
7768
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
     1
/*
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
     2
 * WAD support routines for PhysicsFS.
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
     3
 *
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
     4
 * This driver handles DOOM engine archives ("wads"). 
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
     5
 * This format (but not this driver) was designed by id Software for use
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
     6
 *  with the DOOM engine.
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
     7
 * The specs of the format are from the unofficial doom specs v1.666
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
     8
 * found here: http://www.gamers.org/dhs/helpdocs/dmsp1666.html
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
     9
 * The format of the archive: (from the specs)
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    10
 *
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    11
 *  A WAD file has three parts:
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    12
 *  (1) a twelve-byte header
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    13
 *  (2) one or more "lumps"
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    14
 *  (3) a directory or "info table" that contains the names, offsets, and
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    15
 *      sizes of all the lumps in the WAD
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    16
 *
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    17
 *  The header consists of three four-byte parts:
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    18
 *    (a) an ASCII string which must be either "IWAD" or "PWAD"
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    19
 *    (b) a 4-byte (long) integer which is the number of lumps in the wad
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    20
 *    (c) a long integer which is the file offset to the start of
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    21
 *    the directory
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    22
 *
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    23
 *  The directory has one 16-byte entry for every lump. Each entry consists
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    24
 *  of three parts:
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    25
 *
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    26
 *    (a) a long integer, the file offset to the start of the lump
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    27
 *    (b) a long integer, the size of the lump in bytes
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    28
 *    (c) an 8-byte ASCII string, the name of the lump, padded with zeros.
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    29
 *        For example, the "DEMO1" entry in hexadecimal would be
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    30
 *        (44 45 4D 4F 31 00 00 00)
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    31
 * 
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    32
 * Note that there is no way to tell if an opened WAD archive is a
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    33
 *  IWAD or PWAD with this archiver.
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    34
 * I couldn't think of a way to provide that information, without being too
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    35
 *  hacky.
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    36
 * I don't think it's really that important though.
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    37
 *
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    38
 *
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    39
 * Please see the file LICENSE.txt in the source's root directory.
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    40
 *
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    41
 * This file written by Travis Wells, based on the GRP archiver by
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    42
 *  Ryan C. Gordon.
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    43
 */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    44
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    45
#define __PHYSICSFS_INTERNAL__
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    46
#include "physfs_internal.h"
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    47
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    48
#if PHYSFS_SUPPORTS_WAD
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    49
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    50
static UNPKentry *wadLoadEntries(PHYSFS_Io *io, PHYSFS_uint32 fileCount)
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    51
{
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    52
    PHYSFS_uint32 directoryOffset;
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    53
    UNPKentry *entries = NULL;
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    54
    UNPKentry *entry = NULL;
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    55
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    56
    BAIL_IF_MACRO(!__PHYSFS_readAll(io, &directoryOffset, 4), ERRPASS, 0);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    57
    directoryOffset = PHYSFS_swapULE32(directoryOffset);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    58
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    59
    BAIL_IF_MACRO(!io->seek(io, directoryOffset), ERRPASS, 0);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    60
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    61
    entries = (UNPKentry *) allocator.Malloc(sizeof (UNPKentry) * fileCount);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    62
    BAIL_IF_MACRO(!entries, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    63
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    64
    for (entry = entries; fileCount > 0; fileCount--, entry++)
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    65
    {
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    66
        if (!__PHYSFS_readAll(io, &entry->startPos, 4)) goto failed;
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    67
        if (!__PHYSFS_readAll(io, &entry->size, 4)) goto failed;
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    68
        if (!__PHYSFS_readAll(io, &entry->name, 8)) goto failed;
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    69
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    70
        entry->name[8] = '\0'; /* name might not be null-terminated in file. */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    71
        entry->size = PHYSFS_swapULE32(entry->size);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    72
        entry->startPos = PHYSFS_swapULE32(entry->startPos);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    73
    } /* for */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    74
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    75
    return entries;
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    76
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    77
failed:
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    78
    allocator.Free(entries);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    79
    return NULL;
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    80
} /* wadLoadEntries */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    81
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    82
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    83
static void *WAD_openArchive(PHYSFS_Io *io, const char *name, int forWriting)
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    84
{
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    85
    PHYSFS_uint8 buf[4];
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    86
    UNPKentry *entries = NULL;
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    87
    PHYSFS_uint32 count = 0;
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    88
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    89
    assert(io != NULL);  /* shouldn't ever happen. */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    90
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    91
    BAIL_IF_MACRO(forWriting, PHYSFS_ERR_READ_ONLY, NULL);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    92
    BAIL_IF_MACRO(!__PHYSFS_readAll(io, buf, sizeof (buf)), ERRPASS, NULL);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    93
    if ((memcmp(buf, "IWAD", 4) != 0) && (memcmp(buf, "PWAD", 4) != 0))
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    94
        BAIL_MACRO(PHYSFS_ERR_UNSUPPORTED, NULL);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    95
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    96
    BAIL_IF_MACRO(!__PHYSFS_readAll(io, &count, sizeof (count)), ERRPASS, NULL);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    97
    count = PHYSFS_swapULE32(count);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    98
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
    99
    entries = wadLoadEntries(io, count);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   100
    BAIL_IF_MACRO(!entries, ERRPASS, NULL);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   101
    return UNPK_openArchive(io, entries, count);
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   102
} /* WAD_openArchive */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   103
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   104
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   105
const PHYSFS_Archiver __PHYSFS_Archiver_WAD =
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   106
{
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   107
    {
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   108
        "WAD",
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   109
        "DOOM engine format",
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   110
        "Travis Wells <traviswells@mchsi.com>",
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   111
        "http://www.3dmm2.com/doom/",
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   112
    },
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   113
    WAD_openArchive,        /* openArchive() method    */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   114
    UNPK_enumerateFiles,     /* enumerateFiles() method */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   115
    UNPK_openRead,           /* openRead() method       */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   116
    UNPK_openWrite,          /* openWrite() method      */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   117
    UNPK_openAppend,         /* openAppend() method     */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   118
    UNPK_remove,             /* remove() method         */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   119
    UNPK_mkdir,              /* mkdir() method          */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   120
    UNPK_closeArchive,       /* closeArchive() method   */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   121
    UNPK_stat                /* stat() method           */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   122
};
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   123
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   124
#endif  /* defined PHYSFS_SUPPORTS_WAD */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   125
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   126
/* end of wad.c ... */
13e2037ebc79 Try using PhysicsFS.
unc0rr
parents:
diff changeset
   127