archivers/grp.c
author Ryan C. Gordon <icculus@icculus.org>
Tue, 23 Jul 2002 18:11:12 +0000
changeset 370 da631e118455
parent 364 51da162c76f7
child 393 468f75bf4d7d
permissions -rw-r--r--
Fixed entry loading.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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/*
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 * GRP support routines for PhysicsFS.
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 *
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 * This driver handles BUILD engine archives ("groupfiles"). This format
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 *  (but not this driver) was put together by Ken Silverman.
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 *
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 * The format is simple enough. In Ken's words:
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 *
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 *    What's the .GRP file format?
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 *
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 *     The ".grp" file format is just a collection of a lot of files stored
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 *     into 1 big one. I tried to make the format as simple as possible: The
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 *     first 12 bytes contains my name, "KenSilverman". The next 4 bytes is
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 *     the number of files that were compacted into the group file. Then for
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 *     each file, there is a 16 byte structure, where the first 12 bytes are
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 *     the filename, and the last 4 bytes are the file's size. The rest of
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 *     the group file is just the raw data packed one after the other in the
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 *     same order as the list of files.
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 *
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 * (That info is from http://www.advsys.net/ken/build.htm ...)
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 *
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 * Please see the file LICENSE in the source's root directory.
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 *
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 *  This file written by Ryan C. Gordon.
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 */
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#if HAVE_CONFIG_H
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#  include <config.h>
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#endif
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#if (defined PHYSFS_SUPPORTS_GRP)
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <assert.h>
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#include "physfs.h"
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#define __PHYSICSFS_INTERNAL__
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#include "physfs_internal.h"
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/*
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 * When sorting the grp entries in an archive, we use a modified QuickSort.
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 *  When there are less then GRP_QUICKSORT_THRESHOLD entries left to sort,
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 *  we switch over to an InsertionSort for the remainder. Tweak to taste.
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 */
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#define GRP_QUICKSORT_THRESHOLD 4
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typedef struct
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{
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    char name[13];
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    PHYSFS_uint64 startPos;
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    PHYSFS_uint64 size;
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} GRPentry;
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typedef struct
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{
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    char *filename;
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    PHYSFS_sint64 last_mod_time;
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    PHYSFS_uint32 entryCount;
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    GRPentry *entries;
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} GRPinfo;
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typedef struct
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{
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    void *handle;
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    GRPentry *entry;
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    PHYSFS_sint64 curPos;
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} GRPfileinfo;
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static void GRP_dirClose(DirHandle *h);
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static PHYSFS_sint64 GRP_read(FileHandle *handle, void *buffer,
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                              PHYSFS_uint32 objSize, PHYSFS_uint32 objCount);
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static int GRP_eof(FileHandle *handle);
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static PHYSFS_sint64 GRP_tell(FileHandle *handle);
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static int GRP_seek(FileHandle *handle, PHYSFS_uint64 offset);
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static PHYSFS_sint64 GRP_fileLength(FileHandle *handle);
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static int GRP_fileClose(FileHandle *handle);
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static int GRP_isArchive(const char *filename, int forWriting);
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static DirHandle *GRP_openArchive(const char *name, int forWriting);
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static LinkedStringList *GRP_enumerateFiles(DirHandle *h,
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                                            const char *dirname,
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                                            int omitSymLinks);
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static int GRP_exists(DirHandle *h, const char *name);
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static int GRP_isDirectory(DirHandle *h, const char *name);
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static int GRP_isSymLink(DirHandle *h, const char *name);
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static PHYSFS_sint64 GRP_getLastModTime(DirHandle *h, const char *name);
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static FileHandle *GRP_openRead(DirHandle *h, const char *name);
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static const FileFunctions __PHYSFS_FileFunctions_GRP =
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{
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    GRP_read,       /* read() method       */
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    NULL,           /* write() method      */
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    GRP_eof,        /* eof() method        */
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    GRP_tell,       /* tell() method       */
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    GRP_seek,       /* seek() method       */
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    GRP_fileLength, /* fileLength() method */
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    GRP_fileClose   /* fileClose() method  */
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};
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const DirFunctions __PHYSFS_DirFunctions_GRP =
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{
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    GRP_isArchive,          /* isArchive() method      */
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    GRP_openArchive,        /* openArchive() method    */
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    GRP_enumerateFiles,     /* enumerateFiles() method */
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    GRP_exists,             /* exists() method         */
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    GRP_isDirectory,        /* isDirectory() method    */
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    GRP_isSymLink,          /* isSymLink() method      */
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    GRP_getLastModTime,     /* getLastModTime() method */
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    GRP_openRead,           /* openRead() method       */
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    NULL,                   /* openWrite() method      */
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    NULL,                   /* openAppend() method     */
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    NULL,                   /* remove() method         */
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    NULL,                   /* mkdir() method          */
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    GRP_dirClose            /* dirClose() method       */
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};
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const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP =
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{
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    "GRP",
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    "Build engine Groupfile format",
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    "Ryan C. Gordon <icculus@clutteredmind.org>",
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    "http://www.icculus.org/physfs/",
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};
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parents: 69
diff changeset
   132
static void GRP_dirClose(DirHandle *h)
74d1df359be3 Patched to compile with an ancient version of CodeWarrior.
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parents: 69
diff changeset
   133
{
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
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diff changeset
   134
    GRPinfo *info = ((GRPinfo *) h->opaque);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
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parents: 335
diff changeset
   135
    free(info->filename);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
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parents: 335
diff changeset
   136
    free(info->entries);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
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parents: 335
diff changeset
   137
    free(info);
93
74d1df359be3 Patched to compile with an ancient version of CodeWarrior.
Ryan C. Gordon <icculus@icculus.org>
parents: 69
diff changeset
   138
    free(h);
74d1df359be3 Patched to compile with an ancient version of CodeWarrior.
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parents: 69
diff changeset
   139
} /* GRP_dirClose */
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   140
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   141
132
b53fa5093749 Added typedefs and platform-specific i/o.
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parents: 107
diff changeset
   142
static PHYSFS_sint64 GRP_read(FileHandle *handle, void *buffer,
b53fa5093749 Added typedefs and platform-specific i/o.
Ryan C. Gordon <icculus@icculus.org>
parents: 107
diff changeset
   143
                              PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   144
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   145
    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   146
    GRPentry *entry = finfo->entry;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   147
    PHYSFS_uint64 bytesLeft = entry->size - finfo->curPos;
163
fc2b8ee5b420 Approved zeph's comments, fixed a few of my screwups.
Ryan C. Gordon <icculus@icculus.org>
parents: 161
diff changeset
   148
    PHYSFS_uint64 objsLeft = (bytesLeft / objSize);
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   149
    PHYSFS_sint64 rc;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   150
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   151
    if (objsLeft < objCount)
194
09c353d30cd4 Patches for correctness and cleaner win32 support.
Ryan C. Gordon <icculus@icculus.org>
parents: 175
diff changeset
   152
        objCount = (PHYSFS_uint32) objsLeft;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   153
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
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diff changeset
   154
    rc = __PHYSFS_platformRead(finfo->handle, buffer, objSize, objCount);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
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diff changeset
   155
    if (rc > 0)
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
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diff changeset
   156
        finfo->curPos += (rc * objSize);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   157
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
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diff changeset
   158
    return(rc);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   159
} /* GRP_read */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   160
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   161
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   162
static int GRP_eof(FileHandle *handle)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   163
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   164
    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   165
    GRPentry *entry = finfo->entry;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   166
    return(finfo->curPos >= (PHYSFS_sint64) entry->size);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   167
} /* GRP_eof */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   168
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   169
132
b53fa5093749 Added typedefs and platform-specific i/o.
Ryan C. Gordon <icculus@icculus.org>
parents: 107
diff changeset
   170
static PHYSFS_sint64 GRP_tell(FileHandle *handle)
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   171
{
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   172
    return(((GRPfileinfo *) (handle->opaque))->curPos);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   173
} /* GRP_tell */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   174
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   175
132
b53fa5093749 Added typedefs and platform-specific i/o.
Ryan C. Gordon <icculus@icculus.org>
parents: 107
diff changeset
   176
static int GRP_seek(FileHandle *handle, PHYSFS_uint64 offset)
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   177
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   178
    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   179
    GRPentry *entry = finfo->entry;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   180
    PHYSFS_uint64 newPos = (entry->startPos + offset);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   181
    int rc;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   182
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   183
    BAIL_IF_MACRO(offset < 0, ERR_INVALID_ARGUMENT, 0);
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   184
    BAIL_IF_MACRO(newPos > entry->startPos + entry->size, ERR_PAST_EOF, 0);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   185
    rc = __PHYSFS_platformSeek(finfo->handle, newPos);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   186
    if (rc)
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   187
        finfo->curPos = offset;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   188
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   189
    return(rc);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   190
} /* GRP_seek */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   191
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   192
132
b53fa5093749 Added typedefs and platform-specific i/o.
Ryan C. Gordon <icculus@icculus.org>
parents: 107
diff changeset
   193
static PHYSFS_sint64 GRP_fileLength(FileHandle *handle)
28
529214f57d1b Added PHYSFS_fileLength(). Bleh.
Ryan C. Gordon <icculus@icculus.org>
parents: 26
diff changeset
   194
{
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   195
    return(((GRPfileinfo *) handle->opaque)->entry->size);
28
529214f57d1b Added PHYSFS_fileLength(). Bleh.
Ryan C. Gordon <icculus@icculus.org>
parents: 26
diff changeset
   196
} /* GRP_fileLength */
529214f57d1b Added PHYSFS_fileLength(). Bleh.
Ryan C. Gordon <icculus@icculus.org>
parents: 26
diff changeset
   197
529214f57d1b Added PHYSFS_fileLength(). Bleh.
Ryan C. Gordon <icculus@icculus.org>
parents: 26
diff changeset
   198
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   199
static int GRP_fileClose(FileHandle *handle)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   200
{
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   201
    GRPfileinfo *finfo = ((GRPfileinfo *) handle->opaque);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   202
    BAIL_IF_MACRO(!__PHYSFS_platformClose(finfo->handle), NULL, 0);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   203
    free(finfo);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   204
    free(handle);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   205
    return(1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   206
} /* GRP_fileClose */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   207
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   208
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   209
static int grp_open(const char *filename, int forWriting,
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   210
                    void **fh, PHYSFS_uint32 *count)
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   211
{
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   212
    PHYSFS_uint8 buf[12];
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   213
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   214
    *fh = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   215
    BAIL_IF_MACRO(forWriting, ERR_ARC_IS_READ_ONLY, 0);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   216
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   217
    *fh = __PHYSFS_platformOpenRead(filename);
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   218
    BAIL_IF_MACRO(*fh == NULL, NULL, 0);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   219
    
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   220
    if (__PHYSFS_platformRead(*fh, buf, 12, 1) != 1)
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   221
        goto openGrp_failed;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   222
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   223
    if (memcmp(buf, "KenSilverman", 12) != 0)
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   224
    {
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   225
        __PHYSFS_setError(ERR_UNSUPPORTED_ARCHIVE);
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   226
        goto openGrp_failed;
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   227
    } /* if */
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   228
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   229
    if (__PHYSFS_platformRead(*fh, count, sizeof (PHYSFS_uint32), 1) != 1)
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   230
        goto openGrp_failed;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   231
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   232
    *count = PHYSFS_swapULE32(*count);
175
45e423c38ff8 Fixed byte ordering bugs.
Ryan C. Gordon <icculus@icculus.org>
parents: 163
diff changeset
   233
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   234
    return(1);
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   235
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   236
openGrp_failed:
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   237
    if (*fh != NULL)
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   238
        __PHYSFS_platformClose(*fh);
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   239
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   240
    *count = -1;
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   241
    *fh = NULL;
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   242
    return(0);
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   243
} /* grp_open */
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   244
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   245
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   246
static int GRP_isArchive(const char *filename, int forWriting)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   247
{
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   248
    void *fh;
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   249
    PHYSFS_uint32 fileCount;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   250
    int retval = grp_open(filename, forWriting, &fh, &fileCount);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   251
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   252
    if (fh != NULL)
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   253
        __PHYSFS_platformClose(fh);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   254
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   255
    return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   256
} /* GRP_isArchive */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   257
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   258
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   259
static void grp_entry_swap(GRPentry *a, PHYSFS_uint32 one, PHYSFS_uint32 two)
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   260
{
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   261
    GRPentry tmp;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   262
    memcpy(&tmp, &a[one], sizeof (GRPentry));
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   263
    memcpy(&a[one], &a[two], sizeof (GRPentry));
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
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    memcpy(&a[two], &tmp, sizeof (GRPentry));
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} /* grp_entry_swap */
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   266
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   267
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static void grp_quick_sort(GRPentry *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi)
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{
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    PHYSFS_uint32 i;
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    PHYSFS_uint32 j;
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    GRPentry *v;
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	if ((hi - lo) > GRP_QUICKSORT_THRESHOLD)
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	{
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		i = (hi + lo) / 2;
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		if (strcmp(a[lo].name, a[i].name) > 0) grp_entry_swap(a, lo, i);
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		if (strcmp(a[lo].name, a[hi].name) > 0) grp_entry_swap(a, lo, hi);
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		if (strcmp(a[i].name, a[hi].name) > 0) grp_entry_swap(a, i, hi);
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   281
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		j = hi - 1;
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		grp_entry_swap(a, i, j);
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		i = lo;
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		v = &a[j];
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   286
		while (1)
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		{
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			while(strcmp(a[++i].name, v->name) < 0) {}
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			while(strcmp(a[--j].name, v->name) > 0) {}
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   290
			if (j < i)
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   291
                break;
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			grp_entry_swap(a, i, j);
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		} /* while */
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		grp_entry_swap(a, i, hi-1);
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		grp_quick_sort(a, lo, j);
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		grp_quick_sort(a, i+1, hi);
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	} /* if */
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} /* grp_quick_sort */
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   299
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   300
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static void grp_insertion_sort(GRPentry *a, PHYSFS_uint32 lo, PHYSFS_uint32 hi)
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{
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    PHYSFS_uint32 i;
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    PHYSFS_uint32 j;
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   305
    GRPentry tmp;
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   306
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    for (i = lo + 1; i <= hi; i++)
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    {
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        memcpy(&tmp, &a[i], sizeof (GRPentry));
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        j = i;
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   311
        while ((j > lo) && (strcmp(a[j - 1].name, tmp.name) > 0))
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        {
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            memcpy(&a[j], &a[j - 1], sizeof (GRPentry));
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            j--;
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   315
        } /* while */
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        memcpy(&a[j], &tmp, sizeof (GRPentry));
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   317
    } /* for */
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} /* grp_insertion_sort */
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   320
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static void grp_sort_entries(GRPentry *entries, PHYSFS_uint32 max)
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{
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    /*
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     * Fast Quicksort algorithm inspired by code from here:
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     *   http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html
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   326
     */
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    if (max <= GRP_QUICKSORT_THRESHOLD)
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        grp_quick_sort(entries, 0, max - 1);
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   329
	grp_insertion_sort(entries, 0, max - 1);
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   330
} /* grp_sort_entries */
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   331
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   332
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static int grp_load_entries(const char *name, int forWriting, GRPinfo *info)
24
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{
139
616420dc210c Converted to file i/o abstraction, removed race condition.
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    void *fh = NULL;
364
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   336
    PHYSFS_uint32 fileCount;
370
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    PHYSFS_uint32 location = 16;  /* sizeof sig. */
364
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   338
    GRPentry *entry;
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   339
    char *ptr;
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   340
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   341
    BAIL_IF_MACRO(!grp_open(name, forWriting, &fh, &fileCount), NULL, 0);
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   342
    info->entryCount = fileCount;
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   343
    info->entries = (GRPentry *) malloc(sizeof (GRPentry) * fileCount);
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   344
    if (info->entries == NULL)
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   345
    {
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   346
        __PHYSFS_platformClose(fh);
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        BAIL_MACRO(ERR_OUT_OF_MEMORY, 0);
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   348
    } /* if */
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   349
370
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   350
    location += (16 * fileCount);
da631e118455 Fixed entry loading.
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   351
364
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   352
    for (entry = info->entries; fileCount > 0; fileCount--, entry++)
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   353
    {
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        if (__PHYSFS_platformRead(fh, &entry->name, 12, 1) != 1)
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   355
        {
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   356
            __PHYSFS_platformClose(fh);
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   357
            return(0);
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   358
        } /* if */
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   359
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   360
        entry->name[12] = '\0';  /* name isn't null-terminated in file. */
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   361
        if ((ptr = strchr(entry->name, ' ')) != NULL)
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            *ptr = '\0';  /* trim extra spaces. */
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   363
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   364
        if (__PHYSFS_platformRead(fh, &entry->size, 4, 1) != 1)
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   365
        {
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   366
            __PHYSFS_platformClose(fh);
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   367
            return(0);
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   368
        } /* if */
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   369
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   370
        entry->size = PHYSFS_swapULE32(entry->size);
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   371
        entry->startPos = location;
370
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   372
        location += entry->size;
364
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   373
    } /* for */
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   374
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   375
    __PHYSFS_platformClose(fh);
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   376
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   377
    grp_sort_entries(info->entries, info->entryCount);
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   378
    return(1);
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   379
} /* grp_load_entries */
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   380
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   381
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   382
static DirHandle *GRP_openArchive(const char *name, int forWriting)
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   383
{
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   384
    GRPinfo *info;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   385
    DirHandle *retval = malloc(sizeof (DirHandle));
364
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   386
    PHYSFS_sint64 modtime = __PHYSFS_platformGetLastModTime(name);
24
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   387
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   388
    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
364
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   389
    info = retval->opaque = malloc(sizeof (GRPinfo));
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   390
    if (info == NULL)
24
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   391
    {
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   392
        __PHYSFS_setError(ERR_OUT_OF_MEMORY);
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   393
        goto GRP_openArchive_failed;
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   394
    } /* if */
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   395
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   396
    memset(info, '\0', sizeof (GRPinfo));
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   397
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   398
    info->filename = (char *) malloc(strlen(name) + 1);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   399
    if (info->filename == NULL)
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   400
    {
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   401
        __PHYSFS_setError(ERR_OUT_OF_MEMORY);
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   402
        goto GRP_openArchive_failed;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   403
    } /* if */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   404
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   405
    if (!grp_load_entries(name, forWriting, info))
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   406
        goto GRP_openArchive_failed;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   407
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   408
    strcpy(info->filename, name);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   409
    info->last_mod_time = modtime;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   410
    retval->funcs = &__PHYSFS_DirFunctions_GRP;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   411
    return(retval);
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   412
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   413
GRP_openArchive_failed:
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   414
    if (retval != NULL)
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   415
    {
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   416
        if (retval->opaque != NULL)
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   417
        {
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   418
            if (info->filename != NULL)
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   419
                free(info->filename);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   420
            if (info->entries != NULL)
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   421
                free(info->entries);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   422
            free(info);
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   423
        } /* if */
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   424
        free(retval);
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   425
    } /* if */
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   426
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   427
    return(NULL);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   428
} /* GRP_openArchive */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   429
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   430
41
ff60d39d0862 Architecture adjustment for enumerating files with regards to whether
Ryan C. Gordon <icculus@icculus.org>
parents: 39
diff changeset
   431
static LinkedStringList *GRP_enumerateFiles(DirHandle *h,
ff60d39d0862 Architecture adjustment for enumerating files with regards to whether
Ryan C. Gordon <icculus@icculus.org>
parents: 39
diff changeset
   432
                                            const char *dirname,
ff60d39d0862 Architecture adjustment for enumerating files with regards to whether
Ryan C. Gordon <icculus@icculus.org>
parents: 39
diff changeset
   433
                                            int omitSymLinks)
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   434
{
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   435
    GRPinfo *info = ((GRPinfo *) h->opaque);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   436
    GRPentry *entry = info->entries;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   437
    LinkedStringList *retval = NULL, *p = NULL;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   438
    PHYSFS_uint32 max = info->entryCount;
161
4fcc863fdc5f -Added type casting that Ryan needs to approve.
Gregory S. Read <zeph@clutteredmind.org>
parents: 150
diff changeset
   439
    PHYSFS_uint32 i;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   440
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   441
    /* no directories in GRP files. */
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   442
    BAIL_IF_MACRO(*dirname != '\0', ERR_NOT_A_DIR, NULL);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   443
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   444
    for (i = 0; i < max; i++, entry++)
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   445
        retval = __PHYSFS_addToLinkedStringList(retval, &p, entry->name, -1);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   446
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   447
    return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   448
} /* GRP_enumerateFiles */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   449
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   450
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   451
static GRPentry *grp_find_entry(GRPinfo *info, const char *name)
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   452
{
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   453
    char *ptr = strchr(name, '.');
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   454
    GRPentry *a = info->entries;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   455
    PHYSFS_sint32 lo = 0;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   456
    PHYSFS_sint32 hi = (PHYSFS_sint32) (info->entryCount - 1);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   457
    PHYSFS_sint32 middle;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   458
    int rc;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   459
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   460
    /*
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   461
     * Rule out filenames to avoid unneeded processing...no dirs,
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   462
     *   big filenames, or extensions > 3 chars.
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   463
     */
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   464
    BAIL_IF_MACRO((ptr) && (strlen(ptr) > 4), ERR_NO_SUCH_FILE, NULL);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   465
    BAIL_IF_MACRO(strlen(name) > 12, ERR_NO_SUCH_FILE, NULL);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   466
    BAIL_IF_MACRO(strchr(name, '/') != NULL, ERR_NO_SUCH_FILE, NULL);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   467
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   468
    while (lo <= hi)
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   469
    {
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   470
        middle = lo + ((hi - lo) / 2);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   471
        rc = strcmp(name, a[middle].name);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   472
        if (rc == 0)  /* found it! */
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   473
            return(&a[middle]);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   474
        else if (rc > 0)
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   475
            lo = middle + 1;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   476
        else
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   477
            hi = middle - 1;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   478
    } /* while */
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   479
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   480
    BAIL_MACRO(ERR_NO_SUCH_FILE, NULL);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   481
} /* grp_find_entry */
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   482
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   483
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   484
static int GRP_exists(DirHandle *h, const char *name)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   485
{
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   486
    return(grp_find_entry(((GRPinfo *) h->opaque), name) != NULL);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   487
} /* GRP_exists */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   488
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   489
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   490
static int GRP_isDirectory(DirHandle *h, const char *name)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   491
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   492
    return(0);  /* never directories in a groupfile. */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   493
} /* GRP_isDirectory */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   494
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   495
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   496
static int GRP_isSymLink(DirHandle *h, const char *name)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   497
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   498
    return(0);  /* never symlinks in a groupfile. */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   499
} /* GRP_isSymLink */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   500
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   501
258
80fe5c9954dd getLastModTime implemented.
Ryan C. Gordon <icculus@icculus.org>
parents: 240
diff changeset
   502
static PHYSFS_sint64 GRP_getLastModTime(DirHandle *h, const char *name)
80fe5c9954dd getLastModTime implemented.
Ryan C. Gordon <icculus@icculus.org>
parents: 240
diff changeset
   503
{
80fe5c9954dd getLastModTime implemented.
Ryan C. Gordon <icculus@icculus.org>
parents: 240
diff changeset
   504
    /* Just return the time of the GRP itself in the physical filesystem. */
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   505
    return(((GRPinfo *) h->opaque)->last_mod_time);
258
80fe5c9954dd getLastModTime implemented.
Ryan C. Gordon <icculus@icculus.org>
parents: 240
diff changeset
   506
} /* GRP_getLastModTime */
80fe5c9954dd getLastModTime implemented.
Ryan C. Gordon <icculus@icculus.org>
parents: 240
diff changeset
   507
80fe5c9954dd getLastModTime implemented.
Ryan C. Gordon <icculus@icculus.org>
parents: 240
diff changeset
   508
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   509
static FileHandle *GRP_openRead(DirHandle *h, const char *name)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   510
{
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   511
    GRPinfo *info = ((GRPinfo *) h->opaque);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   512
    FileHandle *retval;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   513
    GRPfileinfo *finfo;
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   514
    GRPentry *entry;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   515
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   516
    entry = grp_find_entry(info, name);
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   517
    BAIL_IF_MACRO(entry == NULL, NULL, NULL);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   518
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   519
    retval = (FileHandle *) malloc(sizeof (FileHandle));
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   520
    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   521
    finfo = (GRPfileinfo *) malloc(sizeof (GRPfileinfo));
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   522
    if (finfo == NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   523
    {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   524
        free(retval);
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   525
        BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   526
    } /* if */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   527
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   528
    finfo->handle = __PHYSFS_platformOpenRead(info->filename);
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   529
    if ( (finfo->handle == NULL) ||
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   530
         (!__PHYSFS_platformSeek(finfo->handle, entry->startPos)) )
139
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   531
    {
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   532
        free(finfo);
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   533
        free(retval);
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   534
        return(NULL);
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   535
    } /* if */
616420dc210c Converted to file i/o abstraction, removed race condition.
Ryan C. Gordon <icculus@icculus.org>
parents: 132
diff changeset
   536
364
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   537
    finfo->curPos = 0;
51da162c76f7 Major overhauls. More efficient, robust, and bug-free.
Ryan C. Gordon <icculus@icculus.org>
parents: 335
diff changeset
   538
    finfo->entry = entry;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   539
    retval->opaque = (void *) finfo;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   540
    retval->funcs = &__PHYSFS_FileFunctions_GRP;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   541
    retval->dirHandle = h;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   542
    return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   543
} /* GRP_openRead */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   544
214
19846c18071b Initial autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
   545
#endif  /* defined PHYSFS_SUPPORTS_GRP */
19846c18071b Initial autoconf support.
Ryan C. Gordon <icculus@icculus.org>
parents: 194
diff changeset
   546
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   547
/* end of grp.c ... */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   548