archivers/grp.c
author Ryan C. Gordon <icculus@icculus.org>
Mon, 09 Jul 2001 04:15:35 +0000
changeset 28 529214f57d1b
parent 26 575e03541d5e
child 29 91b45664ec85
permissions -rw-r--r--
Added PHYSFS_fileLength(). Bleh.
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 <sys/stat.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <unistd.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 (!defined PHYSFS_SUPPORTS_GRP)
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#error PHYSFS_SUPPORTS_GRP must be defined.
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#endif
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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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extern const DirFunctions __PHYSFS_DirFunctions_GRP;
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static const FileFunctions __PHYSFS_FileFunctions_GRP;
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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;
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    int objsLeft = bytesLeft / objSize;
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    int retval = 0;
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    if (objsLeft < objCount)
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        objCount = objsLeft;
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    errno = 0;
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    BAIL_IF_MACRO(fseek(fh,finfo->curPos,SEEK_SET) == -1,strerror(errno),-1);
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    errno = 0;
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    retval = fread(buffer, objSize, objCount, fh);
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    finfo->curPos += (retval * objSize);
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    BAIL_IF_MACRO((retval < objCount) && (ferror(fh)),strerror(errno),retval);
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    return(retval);
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} /* GRP_read */
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static int GRP_eof(FileHandle *handle)
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{
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    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
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    return(finfo->curPos >= finfo->startPos + finfo->size);
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} /* GRP_eof */
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static int GRP_tell(FileHandle *handle)
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{
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    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
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    return(finfo->curPos - finfo->startPos);
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} /* GRP_tell */
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static int GRP_seek(FileHandle *handle, int offset)
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{
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    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
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    int newPos = finfo->startPos + offset;
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    BAIL_IF_MACRO(offset < 0, ERR_INVALID_ARGUMENT, 0);
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    BAIL_IF_MACRO(newPos > finfo->startPos + finfo->size, ERR_PAST_EOF, 0);
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    finfo->curPos = newPos;
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    return(1);
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} /* GRP_seek */
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static int GRP_fileLength(FileHandle *handle)
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{
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    GRPfileinfo *finfo = (GRPfileinfo *) (handle->opaque);
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    return(finfo->size);
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} /* GRP_fileLength */
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static int GRP_fileClose(FileHandle *handle)
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{
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    free(handle->opaque);
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    free(handle);
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    return(1);
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} /* GRP_fileClose */
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static int openGrp(const char *filename, int forWriting, FILE **fh, int *count)
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{
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    char buf[12];
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   137
    assert(sizeof (int) == 4);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   138
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   139
    *fh = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   140
    BAIL_IF_MACRO(forWriting, ERR_ARC_IS_READ_ONLY, 0);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   141
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   142
    errno = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   143
    *fh = fopen(filename, "rb");
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   144
    BAIL_IF_MACRO(*fh == NULL, strerror(errno), 0);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   145
    
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   146
    errno = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   147
    BAIL_IF_MACRO(fread(buf, 12, 1, *fh) != 1, strerror(errno), 0);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   148
    BAIL_IF_MACRO(strncmp(buf, "KenSilverman", 12) != 0,
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   149
                    ERR_UNSUPPORTED_ARCHIVE, 0);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   150
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   151
    if (fread(count, 4, 1, *fh) != 1)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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parents:
diff changeset
   152
        *count = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   153
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   154
    return(1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   155
} /* openGrp */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   156
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   157
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   158
static int GRP_isArchive(const char *filename, int forWriting)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   159
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   160
    FILE *fh;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   161
    int fileCount;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   162
    int retval = openGrp(filename, forWriting, &fh, &fileCount);
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.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   164
    if (fh != NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   165
        fclose(fh);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   166
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   167
    return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   168
} /* GRP_isArchive */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   169
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   170
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   171
static DirHandle *GRP_openArchive(const char *name, int forWriting)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   172
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   173
    FILE *fh;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   174
    int fileCount;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   175
    DirHandle *retval = malloc(sizeof (DirHandle));
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   176
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   177
    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
   178
    retval->opaque = malloc(sizeof (GRPinfo));
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   179
    if (retval->opaque == NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   180
    {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   181
        free(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   182
        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
   183
    } /* if */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   184
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   185
    if (!openGrp(name, forWriting, &fh, &fileCount))
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   186
    {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   187
        if (fh != NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   188
            fclose(fh);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   189
        free(retval->opaque);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   190
        free(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   191
    } /* if */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   192
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   193
    ((GRPinfo *) retval->opaque)->handle = fh;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   194
    ((GRPinfo *) retval->opaque)->totalEntries = fileCount;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   195
    retval->funcs = &__PHYSFS_DirFunctions_GRP;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   196
    return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   197
} /* GRP_openArchive */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   198
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   199
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   200
static LinkedStringList *GRP_enumerateFiles(DirHandle *h, const char *dirname)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   201
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   202
    char buf[16];
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   203
    GRPinfo *g = (GRPinfo *) (h->opaque);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   204
    FILE *fh = g->handle;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   205
    int i;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   206
    LinkedStringList *retval = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   207
    LinkedStringList *l = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   208
    LinkedStringList *prev = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   209
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   210
        /* jump to first file entry... */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   211
    errno = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   212
    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
   213
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   214
    for (i = 0; i < g->totalEntries; i++)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   215
    {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   216
        errno = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   217
        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
   218
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   219
        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
   220
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   221
        l = (LinkedStringList *) malloc(sizeof (LinkedStringList));
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   222
        if (l != NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   223
            break;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   224
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   225
        l->str = (char *) malloc(strlen(buf) + 1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   226
        if (l->str == NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   227
        {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   228
            free(l);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   229
            break;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   230
        } /* if */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   231
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   232
        if (retval == NULL)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   233
            retval = l;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   234
        else
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   235
            prev->next = l;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   236
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   237
        prev = l;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   238
        l->next = NULL;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   239
    } /* for */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   240
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   241
    return(retval);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   242
} /* GRP_enumerateFiles */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   243
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
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
   246
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   247
    char buf[16];
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   248
    GRPinfo *g = (GRPinfo *) (h->opaque);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   249
    FILE *fh = g->handle;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   250
    int i;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   251
    char *ptr;
26
575e03541d5e Logic fixes; seems to work rather well with KenBuild, now.
Ryan C. Gordon <icculus@icculus.org>
parents: 24
diff changeset
   252
    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
   253
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   254
    /* 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
   255
    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
   256
        return(-1);
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
    ptr = strchr(name, '.');
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   259
    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
   260
        return(-1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   261
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   262
    if (strlen(name) > 12)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   263
        return(-1);
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   264
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   265
        /* jump to first file entry... */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   266
    errno = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   267
    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
   268
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   269
    for (i = 0; i < g->totalEntries; i++)
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   270
    {
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   271
        int fsize;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   272
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   273
        errno = 0;
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   274
        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
   275
b050804123a3 Initial add. Implemented, buggy, but not crashing.
Ryan C. Gordon <icculus@icculus.org>
parents:
diff changeset
   276
        fsize = *((int *) (buf + 12));
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        buf[12] = '\0';  /* FILENAME.EXT is all you get. */
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        if (__PHYSFS_platformStricmp(buf, name) == 0)
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        {
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            if (size != NULL)
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                *size = fsize;
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            return(retval);
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        } /* if */
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        retval += fsize;
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    } /* for */
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    return(-1);  /* not found. */
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   291
} /* getFileEntry */
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   292
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   293
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static int GRP_exists(DirHandle *h, const char *name)
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{
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    return(getFileEntry(h, name, NULL) != -1);
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} /* GRP_exists */
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   298
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   299
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static int GRP_isDirectory(DirHandle *h, const char *name)
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{
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    return(0);  /* never directories in a groupfile. */
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   303
} /* GRP_isDirectory */
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   304
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static int GRP_isSymLink(DirHandle *h, const char *name)
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{
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    return(0);  /* never symlinks in a groupfile. */
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} /* GRP_isSymLink */
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static FileHandle *GRP_openRead(DirHandle *h, const char *name)
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{
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    FileHandle *retval;
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    GRPfileinfo *finfo;
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    int size, offset;
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   317
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    offset = getFileEntry(h, name, &size);
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    BAIL_IF_MACRO(offset == -1, ERR_NO_SUCH_FILE, NULL);
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    retval = (FileHandle *) malloc(sizeof (FileHandle));
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    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
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   323
    finfo = (GRPfileinfo *) malloc(sizeof (GRPfileinfo));
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   324
    if (finfo == NULL)
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    {
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   326
        free(retval);
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        BAIL_IF_MACRO(1, ERR_OUT_OF_MEMORY, NULL);
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   328
    } /* if */
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   329
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    finfo->startPos = offset;
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   331
    finfo->curPos = offset;
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   332
    finfo->size = size;
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   333
    retval->opaque = (void *) finfo;
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   334
    retval->funcs = &__PHYSFS_FileFunctions_GRP;
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   335
    retval->dirHandle = h;
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   336
    return(retval);
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   337
} /* GRP_openRead */
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   338
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   339
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   340
static void GRP_dirClose(DirHandle *h)
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   341
{
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   342
    fclose( ((GRPinfo *) h->opaque)->handle );
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   343
    free(h->opaque);
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   344
    free(h);
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   345
} /* GRP_dirClose */
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   346
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   347
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   348
static const FileFunctions __PHYSFS_FileFunctions_GRP =
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   349
{
28
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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diff changeset
   350
    GRP_read,       /* read() method       */
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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   351
    NULL,           /* write() method      */
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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   352
    GRP_eof,        /* eof() method        */
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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diff changeset
   353
    GRP_tell,       /* tell() method       */
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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diff changeset
   354
    GRP_seek,       /* seek() method       */
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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   355
    GRP_fileLength, /* fileLength() method */
529214f57d1b Added PHYSFS_fileLength(). Bleh.
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diff changeset
   356
    GRP_fileClose   /* fileClose() method  */
24
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   357
};
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   358
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   359
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   360
const DirFunctions __PHYSFS_DirFunctions_GRP =
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diff changeset
   361
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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   362
    GRP_isArchive,          /* isArchive() method      */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   363
    GRP_openArchive,        /* openArchive() method    */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   364
    GRP_enumerateFiles,     /* enumerateFiles() method */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   365
    GRP_exists,             /* exists() method         */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   366
    GRP_isDirectory,        /* isDirectory() method    */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   367
    GRP_isSymLink,          /* isSymLink() method      */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   368
    GRP_openRead,           /* openRead() method       */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   369
    NULL,                   /* openWrite() method      */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   370
    NULL,                   /* openAppend() method     */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   371
    NULL,                   /* remove() method         */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   372
    NULL,                   /* mkdir() method          */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   373
    GRP_dirClose            /* dirClose() method       */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   374
};
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   375
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   376
const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_GRP =
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   377
{
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   378
    "GRP",
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   379
    "Build engine Groupfile format"
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   380
};
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   381
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   382
/* end of grp.c ... */
b050804123a3 Initial add. Implemented, buggy, but not crashing.
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diff changeset
   383