--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/archiver_qpak.c	Fri Feb 22 05:43:56 2013 +0100
@@ -0,0 +1,119 @@
+/*
+ * QPAK support routines for PhysicsFS.
+ *
+ *  This archiver handles the archive format utilized by Quake 1 and 2.
+ *  Quake3-based games use the PkZip/Info-Zip format (which our zip.c
+ *  archiver handles).
+ *
+ *  ========================================================================
+ *
+ *  This format info (in more detail) comes from:
+ *     http://debian.fmi.uni-sofia.bg/~sergei/cgsr/docs/pak.txt
+ *
+ *  Quake PAK Format
+ *
+ *  Header
+ *   (4 bytes)  signature = 'PACK'
+ *   (4 bytes)  directory offset
+ *   (4 bytes)  directory length
+ *
+ *  Directory
+ *   (56 bytes) file name
+ *   (4 bytes)  file position
+ *   (4 bytes)  file length
+ *
+ *  ========================================================================
+ *
+ * Please see the file LICENSE.txt in the source's root directory.
+ *
+ *  This file written by Ryan C. Gordon.
+ */
+
+#define __PHYSICSFS_INTERNAL__
+#include "physfs_internal.h"
+
+#if PHYSFS_SUPPORTS_QPAK
+
+#define QPAK_SIG 0x4B434150   /* "PACK" in ASCII. */
+
+static UNPKentry *qpakLoadEntries(PHYSFS_Io *io, PHYSFS_uint32 fileCount)
+{
+    UNPKentry *entries = NULL;
+    UNPKentry *entry = NULL;
+
+    entries = (UNPKentry *) allocator.Malloc(sizeof (UNPKentry) * fileCount);
+    BAIL_IF_MACRO(entries == NULL, PHYSFS_ERR_OUT_OF_MEMORY, NULL);
+
+    for (entry = entries; fileCount > 0; fileCount--, entry++)
+    {
+        if (!__PHYSFS_readAll(io, &entry->name, 56)) goto failed;
+        if (!__PHYSFS_readAll(io, &entry->startPos, 4)) goto failed;
+        if (!__PHYSFS_readAll(io, &entry->size, 4)) goto failed;
+        entry->size = PHYSFS_swapULE32(entry->size);
+        entry->startPos = PHYSFS_swapULE32(entry->startPos);
+    } /* for */
+
+    return entries;
+
+failed:
+    allocator.Free(entries);
+    return NULL;
+} /* qpakLoadEntries */
+
+
+static void *QPAK_openArchive(PHYSFS_Io *io, const char *name, int forWriting)
+{
+    UNPKentry *entries = NULL;
+    PHYSFS_uint32 val = 0;
+    PHYSFS_uint32 pos = 0;
+    PHYSFS_uint32 count = 0;
+
+    assert(io != NULL);  /* shouldn't ever happen. */
+
+    BAIL_IF_MACRO(forWriting, PHYSFS_ERR_READ_ONLY, NULL);
+
+    BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL);
+    if (PHYSFS_swapULE32(val) != QPAK_SIG)
+        BAIL_MACRO(PHYSFS_ERR_UNSUPPORTED, NULL);
+
+    BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL);
+    pos = PHYSFS_swapULE32(val);  /* directory table offset. */
+
+    BAIL_IF_MACRO(!__PHYSFS_readAll(io, &val, 4), ERRPASS, NULL);
+    count = PHYSFS_swapULE32(val);
+
+    /* corrupted archive? */
+    BAIL_IF_MACRO((count % 64) != 0, PHYSFS_ERR_CORRUPT, NULL);
+    count /= 64;
+
+    BAIL_IF_MACRO(!io->seek(io, pos), ERRPASS, NULL);
+
+    entries = qpakLoadEntries(io, count);
+    BAIL_IF_MACRO(!entries, ERRPASS, NULL);
+    return UNPK_openArchive(io, entries, count);
+} /* QPAK_openArchive */
+
+
+const PHYSFS_Archiver __PHYSFS_Archiver_QPAK =
+{
+    {
+        "PAK",
+        "Quake I/II format",
+        "Ryan C. Gordon <icculus@icculus.org>",
+        "http://icculus.org/physfs/",
+    },
+    QPAK_openArchive,       /* openArchive() method    */
+    UNPK_enumerateFiles,    /* enumerateFiles() method */
+    UNPK_openRead,          /* openRead() method       */
+    UNPK_openWrite,         /* openWrite() method      */
+    UNPK_openAppend,        /* openAppend() method     */
+    UNPK_remove,            /* remove() method         */
+    UNPK_mkdir,             /* mkdir() method          */
+    UNPK_closeArchive,       /* closeArchive() method   */
+    UNPK_stat               /* stat() method           */
+};
+
+#endif  /* defined PHYSFS_SUPPORTS_QPAK */
+
+/* end of qpak.c ... */
+