archivers/grp.c
author Ryan C. Gordon <icculus@icculus.org>
Tue, 09 Oct 2001 15:15:40 +0000
changeset 107 4fd38db4d6ab
parent 95 215a06fc87eb
child 132 b53fa5093749
permissions -rw-r--r--
Put a FIXME in place.
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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 * As it was never a concern in the DOS-based Duke Nukem days, I treat these
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 *  archives as CASE-INSENSITIVE. Opening "myfile.txt" and "MYFILE.TXT" both
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 *  work, and get the same file.
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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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#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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#if 0
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#if (!defined PHYSFS_SUPPORTS_GRP)
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#error PHYSFS_SUPPORTS_GRP must be defined.
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#endif
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#endif
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/* !!! FIXME: Using the same file handle for all reads is a RACE CONDITION! */
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typedef struct
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{
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    FILE *handle;
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    int totalEntries;
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} GRPinfo;
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typedef struct
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{
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    int startPos;
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    int curPos;
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    int size;
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} GRPfileinfo;
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static void GRP_dirClose(DirHandle *h);
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static int GRP_read(FileHandle *handle, void *buffer,
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                    unsigned int objSize, unsigned int objCount);
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static int GRP_eof(FileHandle *handle);
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static int GRP_tell(FileHandle *handle);
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static int GRP_seek(FileHandle *handle, int offset);
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static int 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 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_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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static void GRP_dirClose(DirHandle *h)
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{
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    fclose( ((GRPinfo *) h->opaque)->handle );
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    free(h->opaque);
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    free(h);
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} /* GRP_dirClose */
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static int GRP_read(FileHandle *handle, void *buffer,
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                    unsigned int objSize, unsigned int objCount)
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{
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    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
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    FILE *fh = (FILE *) (((GRPinfo *) (handle->dirHandle->opaque))->handle);
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    int bytesLeft = (finfo->startPos + finfo->size) - finfo->curPos;
69
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   134
    unsigned int objsLeft = bytesLeft / objSize;
93
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   135
    size_t retval = 0;
24
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   136
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   137
    if (objsLeft < objCount)
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   138
        objCount = objsLeft;
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   139
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   140
    errno = 0;
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   141
    BAIL_IF_MACRO(fseek(fh,finfo->curPos,SEEK_SET) == -1,strerror(errno),-1);
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   142
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   143
    errno = 0;
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   144
    retval = fread(buffer, objSize, objCount, fh);
26
575e03541d5e Logic fixes; seems to work rather well with KenBuild, now.
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   145
    finfo->curPos += (retval * objSize);
93
74d1df359be3 Patched to compile with an ancient version of CodeWarrior.
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   146
    BAIL_IF_MACRO((retval < (size_t) objCount) && (ferror(fh)),
74d1df359be3 Patched to compile with an ancient version of CodeWarrior.
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   147
                   strerror(errno), (int) retval);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   148
93
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   149
    return((int) retval);
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   150
} /* GRP_read */
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   151
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   152
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   153
static int GRP_eof(FileHandle *handle)
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   154
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   155
    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   156
    return(finfo->curPos >= finfo->startPos + finfo->size);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   157
} /* GRP_eof */
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   158
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   159
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   160
static int GRP_tell(FileHandle *handle)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   161
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   162
    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   163
    return(finfo->curPos - finfo->startPos);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   164
} /* GRP_tell */
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   165
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   166
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   167
static int GRP_seek(FileHandle *handle, int offset)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   168
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   169
    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
26
575e03541d5e Logic fixes; seems to work rather well with KenBuild, now.
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   170
    int newPos = finfo->startPos + offset;
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   171
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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    BAIL_IF_MACRO(offset < 0, ERR_INVALID_ARGUMENT, 0);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   173
    BAIL_IF_MACRO(newPos > finfo->startPos + finfo->size, ERR_PAST_EOF, 0);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   174
    finfo->curPos = newPos;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   175
    return(1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   176
} /* GRP_seek */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   177
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   178
28
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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   179
static int GRP_fileLength(FileHandle *handle)
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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   180
{
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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   181
    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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   182
    return(finfo->size);
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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diff changeset
   183
} /* GRP_fileLength */
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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diff changeset
   184
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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diff changeset
   185
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   186
static int GRP_fileClose(FileHandle *handle)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   187
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   188
    free(handle->opaque);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   189
    free(handle);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   190
    return(1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   191
} /* GRP_fileClose */
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   192
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   193
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   194
static int openGrp(const char *filename, int forWriting, FILE **fh, int *count)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   195
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   196
    char buf[12];
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   197
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546a95cc5591 Updates, corrections and enhancements to get this ported to win32.
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diff changeset
   198
     /* !!! FIXME: Get me platform-independent typedefs! */
546a95cc5591 Updates, corrections and enhancements to get this ported to win32.
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diff changeset
   199
    if (sizeof (int) != 4)
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   200
        assert(0);
24
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   201
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   202
    *fh = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   203
    BAIL_IF_MACRO(forWriting, ERR_ARC_IS_READ_ONLY, 0);
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   204
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   205
    errno = 0;
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   206
    *fh = fopen(filename, "rb");
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   207
    BAIL_IF_MACRO(*fh == NULL, strerror(errno), 0);
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diff changeset
   208
    
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   209
    errno = 0;
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   210
    BAIL_IF_MACRO(fread(buf, 12, 1, *fh) != 1, strerror(errno), 0);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   211
    BAIL_IF_MACRO(strncmp(buf, "KenSilverman", 12) != 0,
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   212
                    ERR_UNSUPPORTED_ARCHIVE, 0);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   213
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   214
    if (fread(count, 4, 1, *fh) != 1)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   215
        *count = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   216
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   217
    return(1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   218
} /* openGrp */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   219
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   220
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   221
static int GRP_isArchive(const char *filename, int forWriting)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   222
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   223
    FILE *fh;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   224
    int fileCount;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   225
    int retval = openGrp(filename, forWriting, &fh, &fileCount);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   226
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   227
    if (fh != NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   228
        fclose(fh);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   229
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   230
    return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   231
} /* GRP_isArchive */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   232
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   233
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   234
static DirHandle *GRP_openArchive(const char *name, int forWriting)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   235
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   236
    FILE *fh;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   237
    int fileCount;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   238
    DirHandle *retval = malloc(sizeof (DirHandle));
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   239
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   240
    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   241
    retval->opaque = malloc(sizeof (GRPinfo));
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   242
    if (retval->opaque == NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   243
    {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   244
        free(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   245
        BAIL_IF_MACRO(1, ERR_OUT_OF_MEMORY, NULL);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   246
    } /* if */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   247
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   248
    if (!openGrp(name, forWriting, &fh, &fileCount))
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   249
    {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   250
        if (fh != NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   251
            fclose(fh);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   252
        free(retval->opaque);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   253
        free(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   254
    } /* if */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   255
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   256
    ((GRPinfo *) retval->opaque)->handle = fh;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   257
    ((GRPinfo *) retval->opaque)->totalEntries = fileCount;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   258
    retval->funcs = &__PHYSFS_DirFunctions_GRP;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   259
    return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   260
} /* GRP_openArchive */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   261
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   262
41
ff60d39d0862 Architecture adjustment for enumerating files with regards to whether
Ryan C. Gordon <icculus@icculus.org>
parents: 39
diff changeset
   263
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
   264
                                            const char *dirname,
ff60d39d0862 Architecture adjustment for enumerating files with regards to whether
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   265
                                            int omitSymLinks)
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   266
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   267
    char buf[16];
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   268
    GRPinfo *g = (GRPinfo *) (h->opaque);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   269
    FILE *fh = g->handle;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   270
    int i;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   271
    LinkedStringList *retval = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   272
    LinkedStringList *l = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   273
    LinkedStringList *prev = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   274
31
41c23ac35615 Fixed GRP_enumerateFiles() so that it will only list files in the root of
Ryan C. Gordon <icculus@icculus.org>
parents: 29
diff changeset
   275
    if (*dirname != '\0')   /* no directories in GRP files. */
41c23ac35615 Fixed GRP_enumerateFiles() so that it will only list files in the root of
Ryan C. Gordon <icculus@icculus.org>
parents: 29
diff changeset
   276
        return(NULL);
41c23ac35615 Fixed GRP_enumerateFiles() so that it will only list files in the root of
Ryan C. Gordon <icculus@icculus.org>
parents: 29
diff changeset
   277
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   278
        /* jump to first file entry... */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   279
    errno = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   280
    BAIL_IF_MACRO(fseek(fh, 16, SEEK_SET) == -1, strerror(errno), NULL);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   281
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   282
    for (i = 0; i < g->totalEntries; i++)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   283
    {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   284
        errno = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   285
        BAIL_IF_MACRO(fread(buf, 16, 1, fh) != 1, strerror(errno), retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   286
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   287
        buf[12] = '\0';  /* FILENAME.EXT is all you get. */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   288
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   289
        l = (LinkedStringList *) malloc(sizeof (LinkedStringList));
39
bc29e1ee7ef6 Lots of bugfixes, enhancements, and corrections due to the work on
Ryan C. Gordon <icculus@icculus.org>
parents: 37
diff changeset
   290
        if (l == NULL)
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   291
            break;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   292
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   293
        l->str = (char *) malloc(strlen(buf) + 1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   294
        if (l->str == NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   295
        {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   296
            free(l);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   297
            break;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   298
        } /* if */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   299
39
bc29e1ee7ef6 Lots of bugfixes, enhancements, and corrections due to the work on
Ryan C. Gordon <icculus@icculus.org>
parents: 37
diff changeset
   300
        strcpy(l->str, buf);
bc29e1ee7ef6 Lots of bugfixes, enhancements, and corrections due to the work on
Ryan C. Gordon <icculus@icculus.org>
parents: 37
diff changeset
   301
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   302
        if (retval == NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   303
            retval = l;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   304
        else
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   305
            prev->next = l;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   306
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   307
        prev = l;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   308
        l->next = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   309
    } /* for */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   310
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   311
    return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   312
} /* GRP_enumerateFiles */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   313
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   314
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   315
static int getFileEntry(DirHandle *h, const char *name, int *size)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   316
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   317
    char buf[16];
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   318
    GRPinfo *g = (GRPinfo *) (h->opaque);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   319
    FILE *fh = g->handle;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   320
    int i;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   321
    char *ptr;
26
575e03541d5e Logic fixes; seems to work rather well with KenBuild, now.
Ryan C. Gordon <icculus@icculus.org>
parents: 24
diff changeset
   322
    int retval = (g->totalEntries + 1) * 16; /* offset of raw file data */
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   323
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   324
    /* Rule out filenames to avoid unneeded file i/o... */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   325
    if (strchr(name, '/') != NULL)  /* no directories in groupfiles. */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   326
        return(-1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   327
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   328
    ptr = strchr(name, '.');
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   329
    if ((ptr) && (strlen(ptr) > 4))   /* 3 char extension at most. */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   330
        return(-1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   331
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   332
    if (strlen(name) > 12)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   333
        return(-1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   334
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   335
        /* jump to first file entry... */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   336
    errno = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   337
    BAIL_IF_MACRO(fseek(fh, 16, SEEK_SET) == -1, strerror(errno), -1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   338
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   339
    for (i = 0; i < g->totalEntries; i++)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   340
    {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   341
        int fsize;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   342
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   343
        errno = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   344
        BAIL_IF_MACRO(fread(buf, 16, 1, fh) != 1, strerror(errno), -1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   345
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   346
        fsize = *((int *) (buf + 12));
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   347
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   348
        buf[12] = '\0';  /* FILENAME.EXT is all you get. */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   349
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   350
        if (__PHYSFS_platformStricmp(buf, name) == 0)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   351
        {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   352
            if (size != NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   353
                *size = fsize;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   354
            return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   355
        } /* if */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   356
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   357
        retval += fsize;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   358
    } /* for */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   359
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   360
    return(-1);  /* not found. */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   361
} /* getFileEntry */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   362
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   363
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   364
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
   365
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   366
    return(getFileEntry(h, name, NULL) != -1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   367
} /* GRP_exists */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   368
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   369
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   370
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
   371
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   372
    return(0);  /* never directories in a groupfile. */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   373
} /* GRP_isDirectory */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   374
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   375
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   376
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
   377
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   378
    return(0);  /* never symlinks in a groupfile. */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   379
} /* GRP_isSymLink */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   380
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   381
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   382
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
   383
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   384
    FileHandle *retval;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   385
    GRPfileinfo *finfo;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   386
    int size, offset;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   387
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   388
    offset = getFileEntry(h, name, &size);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   389
    BAIL_IF_MACRO(offset == -1, ERR_NO_SUCH_FILE, NULL);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   390
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   391
    retval = (FileHandle *) malloc(sizeof (FileHandle));
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   392
    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
   393
    finfo = (GRPfileinfo *) malloc(sizeof (GRPfileinfo));
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   394
    if (finfo == NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   395
    {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   396
        free(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   397
        BAIL_IF_MACRO(1, ERR_OUT_OF_MEMORY, NULL);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   398
    } /* if */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   399
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   400
    finfo->startPos = offset;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   401
    finfo->curPos = offset;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   402
    finfo->size = size;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   403
    retval->opaque = (void *) finfo;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   404
    retval->funcs = &__PHYSFS_FileFunctions_GRP;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   405
    retval->dirHandle = h;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   406
    return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   407
} /* GRP_openRead */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   408
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   409
/* end of grp.c ... */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
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