--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/archiver_wad.c Fri Mar 27 15:10:42 2009 -0400
@@ -0,0 +1,534 @@
+/*
+ * WAD support routines for PhysicsFS.
+ *
+ * This driver handles DOOM engine archives ("wads").
+ * This format (but not this driver) was designed by id Software for use
+ * with the DOOM engine.
+ * The specs of the format are from the unofficial doom specs v1.666
+ * found here: http://www.gamers.org/dhs/helpdocs/dmsp1666.html
+ * The format of the archive: (from the specs)
+ *
+ * A WAD file has three parts:
+ * (1) a twelve-byte header
+ * (2) one or more "lumps"
+ * (3) a directory or "info table" that contains the names, offsets, and
+ * sizes of all the lumps in the WAD
+ *
+ * The header consists of three four-byte parts:
+ * (a) an ASCII string which must be either "IWAD" or "PWAD"
+ * (b) a 4-byte (long) integer which is the number of lumps in the wad
+ * (c) a long integer which is the file offset to the start of
+ * the directory
+ *
+ * The directory has one 16-byte entry for every lump. Each entry consists
+ * of three parts:
+ *
+ * (a) a long integer, the file offset to the start of the lump
+ * (b) a long integer, the size of the lump in bytes
+ * (c) an 8-byte ASCII string, the name of the lump, padded with zeros.
+ * For example, the "DEMO1" entry in hexadecimal would be
+ * (44 45 4D 4F 31 00 00 00)
+ *
+ * Note that there is no way to tell if an opened WAD archive is a
+ * IWAD or PWAD with this archiver.
+ * I couldn't think of a way to provide that information, without being too
+ * hacky.
+ * I don't think it's really that important though.
+ *
+ *
+ * Please see the file LICENSE.txt in the source's root directory.
+ *
+ * This file written by Travis Wells, based on the GRP archiver by
+ * Ryan C. Gordon.
+ */
+
+#if (defined PHYSFS_SUPPORTS_WAD)
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "physfs.h"
+
+#define __PHYSICSFS_INTERNAL__
+#include "physfs_internal.h"
+
+typedef struct
+{
+ char name[18];
+ PHYSFS_uint32 startPos;
+ PHYSFS_uint32 size;
+} WADentry;
+
+typedef struct
+{
+ char *filename;
+ PHYSFS_sint64 last_mod_time;
+ PHYSFS_uint32 entryCount;
+ PHYSFS_uint32 entryOffset;
+ WADentry *entries;
+} WADinfo;
+
+typedef struct
+{
+ void *handle;
+ WADentry *entry;
+ PHYSFS_uint32 curPos;
+} WADfileinfo;
+
+
+static void WAD_dirClose(dvoid *opaque)
+{
+ WADinfo *info = ((WADinfo *) opaque);
+ allocator.Free(info->filename);
+ allocator.Free(info->entries);
+ allocator.Free(info);
+} /* WAD_dirClose */
+
+
+static PHYSFS_sint64 WAD_read(fvoid *opaque, void *buffer,
+ PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
+{
+ WADfileinfo *finfo = (WADfileinfo *) opaque;
+ WADentry *entry = finfo->entry;
+ PHYSFS_uint32 bytesLeft = entry->size - finfo->curPos;
+ PHYSFS_uint32 objsLeft = (bytesLeft / objSize);
+ PHYSFS_sint64 rc;
+
+ if (objsLeft < objCount)
+ objCount = objsLeft;
+
+ rc = __PHYSFS_platformRead(finfo->handle, buffer, objSize, objCount);
+ if (rc > 0)
+ finfo->curPos += (PHYSFS_uint32) (rc * objSize);
+
+ return(rc);
+} /* WAD_read */
+
+
+static PHYSFS_sint64 WAD_write(fvoid *opaque, const void *buffer,
+ PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
+{
+ BAIL_MACRO(ERR_NOT_SUPPORTED, -1);
+} /* WAD_write */
+
+
+static int WAD_eof(fvoid *opaque)
+{
+ WADfileinfo *finfo = (WADfileinfo *) opaque;
+ WADentry *entry = finfo->entry;
+ return(finfo->curPos >= entry->size);
+} /* WAD_eof */
+
+
+static PHYSFS_sint64 WAD_tell(fvoid *opaque)
+{
+ return(((WADfileinfo *) opaque)->curPos);
+} /* WAD_tell */
+
+
+static int WAD_seek(fvoid *opaque, PHYSFS_uint64 offset)
+{
+ WADfileinfo *finfo = (WADfileinfo *) opaque;
+ WADentry *entry = finfo->entry;
+ int rc;
+
+ BAIL_IF_MACRO(offset < 0, ERR_INVALID_ARGUMENT, 0);
+ BAIL_IF_MACRO(offset >= entry->size, ERR_PAST_EOF, 0);
+ rc = __PHYSFS_platformSeek(finfo->handle, entry->startPos + offset);
+ if (rc)
+ finfo->curPos = (PHYSFS_uint32) offset;
+
+ return(rc);
+} /* WAD_seek */
+
+
+static PHYSFS_sint64 WAD_fileLength(fvoid *opaque)
+{
+ WADfileinfo *finfo = (WADfileinfo *) opaque;
+ return((PHYSFS_sint64) finfo->entry->size);
+} /* WAD_fileLength */
+
+
+static int WAD_fileClose(fvoid *opaque)
+{
+ WADfileinfo *finfo = (WADfileinfo *) opaque;
+ BAIL_IF_MACRO(!__PHYSFS_platformClose(finfo->handle), NULL, 0);
+ allocator.Free(finfo);
+ return(1);
+} /* WAD_fileClose */
+
+
+static int wad_open(const char *filename, int forWriting,
+ void **fh, PHYSFS_uint32 *count,PHYSFS_uint32 *offset)
+{
+ PHYSFS_uint8 buf[4];
+
+ *fh = NULL;
+ BAIL_IF_MACRO(forWriting, ERR_ARC_IS_READ_ONLY, 0);
+
+ *fh = __PHYSFS_platformOpenRead(filename);
+ BAIL_IF_MACRO(*fh == NULL, NULL, 0);
+
+ if (__PHYSFS_platformRead(*fh, buf, 4, 1) != 1)
+ goto openWad_failed;
+
+ if (memcmp(buf, "IWAD", 4) != 0 && memcmp(buf, "PWAD", 4) != 0)
+ {
+ __PHYSFS_setError(ERR_UNSUPPORTED_ARCHIVE);
+ goto openWad_failed;
+ } /* if */
+
+ if (__PHYSFS_platformRead(*fh, count, sizeof (PHYSFS_uint32), 1) != 1)
+ goto openWad_failed;
+
+ *count = PHYSFS_swapULE32(*count);
+
+ if (__PHYSFS_platformRead(*fh, offset, sizeof (PHYSFS_uint32), 1) != 1)
+ goto openWad_failed;
+
+ *offset = PHYSFS_swapULE32(*offset);
+
+ return(1);
+
+openWad_failed:
+ if (*fh != NULL)
+ __PHYSFS_platformClose(*fh);
+
+ *count = -1;
+ *fh = NULL;
+ return(0);
+} /* wad_open */
+
+
+static int WAD_isArchive(const char *filename, int forWriting)
+{
+ void *fh;
+ PHYSFS_uint32 fileCount,offset;
+ int retval = wad_open(filename, forWriting, &fh, &fileCount,&offset);
+
+ if (fh != NULL)
+ __PHYSFS_platformClose(fh);
+
+ return(retval);
+} /* WAD_isArchive */
+
+
+static int wad_entry_cmp(void *_a, PHYSFS_uint32 one, PHYSFS_uint32 two)
+{
+ if (one != two)
+ {
+ const WADentry *a = (const WADentry *) _a;
+ return(strcmp(a[one].name, a[two].name));
+ } /* if */
+
+ return 0;
+} /* wad_entry_cmp */
+
+
+static void wad_entry_swap(void *_a, PHYSFS_uint32 one, PHYSFS_uint32 two)
+{
+ if (one != two)
+ {
+ WADentry tmp;
+ WADentry *first = &(((WADentry *) _a)[one]);
+ WADentry *second = &(((WADentry *) _a)[two]);
+ memcpy(&tmp, first, sizeof (WADentry));
+ memcpy(first, second, sizeof (WADentry));
+ memcpy(second, &tmp, sizeof (WADentry));
+ } /* if */
+} /* wad_entry_swap */
+
+
+static int wad_load_entries(const char *name, int forWriting, WADinfo *info)
+{
+ void *fh = NULL;
+ PHYSFS_uint32 fileCount;
+ PHYSFS_uint32 directoryOffset;
+ WADentry *entry;
+ char lastDirectory[9];
+
+ lastDirectory[8] = 0; /* Make sure lastDirectory stays null-terminated. */
+
+ BAIL_IF_MACRO(!wad_open(name, forWriting, &fh, &fileCount,&directoryOffset), NULL, 0);
+ info->entryCount = fileCount;
+ info->entries = (WADentry *) allocator.Malloc(sizeof(WADentry)*fileCount);
+ if (info->entries == NULL)
+ {
+ __PHYSFS_platformClose(fh);
+ BAIL_MACRO(ERR_OUT_OF_MEMORY, 0);
+ } /* if */
+
+ __PHYSFS_platformSeek(fh,directoryOffset);
+
+ for (entry = info->entries; fileCount > 0; fileCount--, entry++)
+ {
+ if (__PHYSFS_platformRead(fh, &entry->startPos, 4, 1) != 1)
+ {
+ __PHYSFS_platformClose(fh);
+ return(0);
+ } /* if */
+
+ if (__PHYSFS_platformRead(fh, &entry->size, 4, 1) != 1)
+ {
+ __PHYSFS_platformClose(fh);
+ return(0);
+ } /* if */
+
+ if (__PHYSFS_platformRead(fh, &entry->name, 8, 1) != 1)
+ {
+ __PHYSFS_platformClose(fh);
+ return(0);
+ } /* if */
+
+ entry->name[8] = '\0'; /* name might not be null-terminated in file. */
+ entry->size = PHYSFS_swapULE32(entry->size);
+ entry->startPos = PHYSFS_swapULE32(entry->startPos);
+ } /* for */
+
+ __PHYSFS_platformClose(fh);
+
+ __PHYSFS_sort(info->entries, info->entryCount,
+ wad_entry_cmp, wad_entry_swap);
+ return(1);
+} /* wad_load_entries */
+
+
+static void *WAD_openArchive(const char *name, int forWriting)
+{
+ PHYSFS_sint64 modtime = __PHYSFS_platformGetLastModTime(name);
+ WADinfo *info = (WADinfo *) allocator.Malloc(sizeof (WADinfo));
+
+ BAIL_IF_MACRO(info == NULL, ERR_OUT_OF_MEMORY, NULL);
+ memset(info, '\0', sizeof (WADinfo));
+
+ info->filename = (char *) allocator.Malloc(strlen(name) + 1);
+ GOTO_IF_MACRO(!info->filename, ERR_OUT_OF_MEMORY, WAD_openArchive_failed);
+
+ if (!wad_load_entries(name, forWriting, info))
+ goto WAD_openArchive_failed;
+
+ strcpy(info->filename, name);
+ info->last_mod_time = modtime;
+ return(info);
+
+WAD_openArchive_failed:
+ if (info != NULL)
+ {
+ if (info->filename != NULL)
+ allocator.Free(info->filename);
+ if (info->entries != NULL)
+ allocator.Free(info->entries);
+ allocator.Free(info);
+ } /* if */
+
+ return(NULL);
+} /* WAD_openArchive */
+
+
+static void WAD_enumerateFiles(dvoid *opaque, const char *dname,
+ int omitSymLinks, PHYSFS_EnumFilesCallback cb,
+ const char *origdir, void *callbackdata)
+{
+ WADinfo *info = ((WADinfo *) opaque);
+ WADentry *entry = info->entries;
+ PHYSFS_uint32 max = info->entryCount;
+ PHYSFS_uint32 i;
+ const char *name;
+ char *sep;
+
+ if (*dname == '\0') /* root directory enumeration? */
+ {
+ for (i = 0; i < max; i++, entry++)
+ {
+ name = entry->name;
+ if (strchr(name, '/') == NULL)
+ cb(callbackdata, origdir, name);
+ } /* for */
+ } /* if */
+ else
+ {
+ for (i = 0; i < max; i++, entry++)
+ {
+ name = entry->name;
+ sep = strchr(name, '/');
+ if (sep != NULL)
+ {
+ if (strncmp(dname, name, (sep - name)) == 0)
+ cb(callbackdata, origdir, sep + 1);
+ } /* if */
+ } /* for */
+ } /* else */
+} /* WAD_enumerateFiles */
+
+
+static WADentry *wad_find_entry(WADinfo *info, const char *name)
+{
+ WADentry *a = info->entries;
+ PHYSFS_sint32 lo = 0;
+ PHYSFS_sint32 hi = (PHYSFS_sint32) (info->entryCount - 1);
+ PHYSFS_sint32 middle;
+ int rc;
+
+ while (lo <= hi)
+ {
+ middle = lo + ((hi - lo) / 2);
+ rc = strcmp(name, a[middle].name);
+ if (rc == 0) /* found it! */
+ return(&a[middle]);
+ else if (rc > 0)
+ lo = middle + 1;
+ else
+ hi = middle - 1;
+ } /* while */
+
+ BAIL_MACRO(ERR_NO_SUCH_FILE, NULL);
+} /* wad_find_entry */
+
+
+static int WAD_exists(dvoid *opaque, const char *name)
+{
+ return(wad_find_entry(((WADinfo *) opaque), name) != NULL);
+} /* WAD_exists */
+
+
+static int WAD_isDirectory(dvoid *opaque, const char *name, int *fileExists)
+{
+ WADentry *entry = wad_find_entry(((WADinfo *) opaque), name);
+ if (entry != NULL)
+ {
+ char *n;
+
+ *fileExists = 1;
+
+ /* Can't be a directory if it's a subdirectory. */
+ if (strchr(entry->name, '/') != NULL)
+ return(0);
+
+ /* Check if it matches "MAP??" or "E?M?" ... */
+ n = entry->name;
+ if ((n[0] == 'E' && n[2] == 'M') ||
+ (n[0] == 'M' && n[1] == 'A' && n[2] == 'P' && n[6] == 0))
+ {
+ return(1);
+ } /* if */
+ return(0);
+ } /* if */
+ else
+ {
+ *fileExists = 0;
+ return(0);
+ } /* else */
+} /* WAD_isDirectory */
+
+
+static int WAD_isSymLink(dvoid *opaque, const char *name, int *fileExists)
+{
+ *fileExists = WAD_exists(opaque, name);
+ return(0); /* never symlinks in a wad. */
+} /* WAD_isSymLink */
+
+
+static PHYSFS_sint64 WAD_getLastModTime(dvoid *opaque,
+ const char *name,
+ int *fileExists)
+{
+ WADinfo *info = ((WADinfo *) opaque);
+ PHYSFS_sint64 retval = -1;
+
+ *fileExists = (wad_find_entry(info, name) != NULL);
+ if (*fileExists) /* use time of WAD itself in the physical filesystem. */
+ retval = info->last_mod_time;
+
+ return(retval);
+} /* WAD_getLastModTime */
+
+
+static fvoid *WAD_openRead(dvoid *opaque, const char *fnm, int *fileExists)
+{
+ WADinfo *info = ((WADinfo *) opaque);
+ WADfileinfo *finfo;
+ WADentry *entry;
+
+ entry = wad_find_entry(info, fnm);
+ *fileExists = (entry != NULL);
+ BAIL_IF_MACRO(entry == NULL, NULL, NULL);
+
+ finfo = (WADfileinfo *) allocator.Malloc(sizeof (WADfileinfo));
+ BAIL_IF_MACRO(finfo == NULL, ERR_OUT_OF_MEMORY, NULL);
+
+ finfo->handle = __PHYSFS_platformOpenRead(info->filename);
+ if ( (finfo->handle == NULL) ||
+ (!__PHYSFS_platformSeek(finfo->handle, entry->startPos)) )
+ {
+ allocator.Free(finfo);
+ return(NULL);
+ } /* if */
+
+ finfo->curPos = 0;
+ finfo->entry = entry;
+ return(finfo);
+} /* WAD_openRead */
+
+
+static fvoid *WAD_openWrite(dvoid *opaque, const char *name)
+{
+ BAIL_MACRO(ERR_NOT_SUPPORTED, NULL);
+} /* WAD_openWrite */
+
+
+static fvoid *WAD_openAppend(dvoid *opaque, const char *name)
+{
+ BAIL_MACRO(ERR_NOT_SUPPORTED, NULL);
+} /* WAD_openAppend */
+
+
+static int WAD_remove(dvoid *opaque, const char *name)
+{
+ BAIL_MACRO(ERR_NOT_SUPPORTED, 0);
+} /* WAD_remove */
+
+
+static int WAD_mkdir(dvoid *opaque, const char *name)
+{
+ BAIL_MACRO(ERR_NOT_SUPPORTED, 0);
+} /* WAD_mkdir */
+
+
+const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_WAD =
+{
+ "WAD",
+ WAD_ARCHIVE_DESCRIPTION,
+ "Travis Wells <traviswells@mchsi.com>",
+ "http://www.3dmm2.com/doom/",
+};
+
+
+const PHYSFS_Archiver __PHYSFS_Archiver_WAD =
+{
+ &__PHYSFS_ArchiveInfo_WAD,
+ WAD_isArchive, /* isArchive() method */
+ WAD_openArchive, /* openArchive() method */
+ WAD_enumerateFiles, /* enumerateFiles() method */
+ WAD_exists, /* exists() method */
+ WAD_isDirectory, /* isDirectory() method */
+ WAD_isSymLink, /* isSymLink() method */
+ WAD_getLastModTime, /* getLastModTime() method */
+ WAD_openRead, /* openRead() method */
+ WAD_openWrite, /* openWrite() method */
+ WAD_openAppend, /* openAppend() method */
+ WAD_remove, /* remove() method */
+ WAD_mkdir, /* mkdir() method */
+ WAD_dirClose, /* dirClose() method */
+ WAD_read, /* read() method */
+ WAD_write, /* write() method */
+ WAD_eof, /* eof() method */
+ WAD_tell, /* tell() method */
+ WAD_seek, /* seek() method */
+ WAD_fileLength, /* fileLength() method */
+ WAD_fileClose /* fileClose() method */
+};
+
+#endif /* defined PHYSFS_SUPPORTS_WAD */
+
+/* end of wad.c ... */
+