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physfs/archivers/dir.c

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/*
* Standard directory I/O support routines for PhysicsFS.
*
* Please see the file LICENSE in the source's root directory.
*
* This file written by Ryan C. Gordon.
*/
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include "physfs.h"
#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"
static PHYSFS_sint64 DIR_read(FileHandle *handle, void *buffer,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount);
static PHYSFS_sint64 DIR_write(FileHandle *handle, const void *buffer,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount);
static PHYSFS_sint64 DIR_dummyRead(FileHandle *handle, void *buffer,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount);
static PHYSFS_sint64 DIR_dummyWrite(FileHandle *handle, const void *buffer,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount);
static int DIR_eof(FileHandle *handle);
static PHYSFS_sint64 DIR_tell(FileHandle *handle);
static int DIR_seek(FileHandle *handle, PHYSFS_uint64 offset);
static PHYSFS_sint64 DIR_fileLength(FileHandle *handle);
static int DIR_fileClose(FileHandle *handle);
static int DIR_isArchive(const char *filename, int forWriting);
static DirHandle *DIR_openArchive(const char *name, int forWriting);
static LinkedStringList *DIR_enumerateFiles(DirHandle *h,
const char *dname,
int omitSymLinks);
static int DIR_exists(DirHandle *h, const char *name);
static int DIR_isDirectory(DirHandle *h, const char *name, int *fileExists);
static int DIR_isSymLink(DirHandle *h, const char *name, int *fileExists);
static FileHandle *DIR_openRead(DirHandle *h, const char *fnm, int *exist);
static PHYSFS_sint64 DIR_getLastModTime(DirHandle *h, const char *f, int *e);
static FileHandle *DIR_openWrite(DirHandle *h, const char *filename);
static FileHandle *DIR_openAppend(DirHandle *h, const char *filename);
static int DIR_remove(DirHandle *h, const char *name);
static int DIR_mkdir(DirHandle *h, const char *name);
static void DIR_dirClose(DirHandle *h);
const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_DIR =
{
"",
DIR_ARCHIVE_DESCRIPTION,
"Ryan C. Gordon <icculus@clutteredmind.org>",
"http://icculus.org/physfs/",
};
static const FileFunctions __PHYSFS_FileFunctions_DIR =
{
DIR_read, /* read() method */
DIR_dummyWrite, /* write() method */
DIR_eof, /* eof() method */
DIR_tell, /* tell() method */
DIR_seek, /* seek() method */
DIR_fileLength, /* fileLength() method */
DIR_fileClose /* fileClose() method */
};
static const FileFunctions __PHYSFS_FileFunctions_DIRW =
{
DIR_dummyRead, /* read() method */
DIR_write, /* write() method */
DIR_eof, /* eof() method */
DIR_tell, /* tell() method */
DIR_seek, /* seek() method */
DIR_fileLength, /* fileLength() method */
DIR_fileClose /* fileClose() method */
};
const DirFunctions __PHYSFS_DirFunctions_DIR =
{
&__PHYSFS_ArchiveInfo_DIR,
DIR_isArchive, /* isArchive() method */
DIR_openArchive, /* openArchive() method */
DIR_enumerateFiles, /* enumerateFiles() method */
DIR_exists, /* exists() method */
DIR_isDirectory, /* isDirectory() method */
DIR_isSymLink, /* isSymLink() method */
DIR_getLastModTime, /* getLastModTime() method */
DIR_openRead, /* openRead() method */
DIR_openWrite, /* openWrite() method */
DIR_openAppend, /* openAppend() method */
DIR_remove, /* remove() method */
DIR_mkdir, /* mkdir() method */
DIR_dirClose /* dirClose() method */
};
static PHYSFS_sint64 DIR_read(FileHandle *handle, void *buffer,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
{
PHYSFS_sint64 retval;
retval = __PHYSFS_platformRead(handle->opaque, buffer, objSize, objCount);
return(retval);
} /* DIR_read */
static PHYSFS_sint64 DIR_write(FileHandle *handle, const void *buffer,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
{
PHYSFS_sint64 retval;
retval = __PHYSFS_platformWrite(handle->opaque, buffer, objSize, objCount);
return(retval);
} /* DIR_write */
static PHYSFS_sint64 DIR_dummyRead(FileHandle *handle, void *buffer,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
{
BAIL_MACRO(ERR_NOT_SUPPORTED, -1);
} /* DIR_dummyRead */
static PHYSFS_sint64 DIR_dummyWrite(FileHandle *handle, const void *buffer,
PHYSFS_uint32 objSize, PHYSFS_uint32 objCount)
{
BAIL_MACRO(ERR_NOT_SUPPORTED, -1);
} /* DIR_dummyWrite */
static int DIR_eof(FileHandle *handle)
{
return(__PHYSFS_platformEOF(handle->opaque));
} /* DIR_eof */
static PHYSFS_sint64 DIR_tell(FileHandle *handle)
{
return(__PHYSFS_platformTell(handle->opaque));
} /* DIR_tell */
static int DIR_seek(FileHandle *handle, PHYSFS_uint64 offset)
{
return(__PHYSFS_platformSeek(handle->opaque, offset));
} /* DIR_seek */
static PHYSFS_sint64 DIR_fileLength(FileHandle *handle)
{
return(__PHYSFS_platformFileLength(handle->opaque));
} /* DIR_fileLength */
static int DIR_fileClose(FileHandle *handle)
{
/*
* we manually flush the buffer, since that's the place a close will
* most likely fail, but that will leave the file handle in an undefined
* state if it fails. Flush failures we can recover from.
*/
BAIL_IF_MACRO(!__PHYSFS_platformFlush(handle->opaque), NULL, 0);
BAIL_IF_MACRO(!__PHYSFS_platformClose(handle->opaque), NULL, 0);
free(handle);
return(1);
} /* DIR_fileClose */
static int DIR_isArchive(const char *filename, int forWriting)
{
/* directories ARE archives in this driver... */
return(__PHYSFS_platformIsDirectory(filename));
} /* DIR_isArchive */
static DirHandle *DIR_openArchive(const char *name, int forWriting)
{
const char *dirsep = PHYSFS_getDirSeparator();
DirHandle *retval = NULL;
size_t namelen = strlen(name);
size_t seplen = strlen(dirsep);
BAIL_IF_MACRO(!DIR_isArchive(name, forWriting),
ERR_UNSUPPORTED_ARCHIVE, NULL);
retval = (DirHandle *) malloc(sizeof (DirHandle));
BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);
retval->opaque = malloc(namelen + seplen + 1);
if (retval->opaque == NULL)
{
free(retval);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* if */
/* make sure there's a dir separator at the end of the string */
strcpy((char *) (retval->opaque), name);
if (strcmp((name + namelen) - seplen, dirsep) != 0)
strcat((char *) (retval->opaque), dirsep);
retval->funcs = &__PHYSFS_DirFunctions_DIR;
return(retval);
} /* DIR_openArchive */
static LinkedStringList *DIR_enumerateFiles(DirHandle *h,
const char *dname,
int omitSymLinks)
{
char *d = __PHYSFS_platformCvtToDependent((char *)(h->opaque),dname,NULL);
LinkedStringList *retval;
BAIL_IF_MACRO(d == NULL, NULL, NULL);
retval = __PHYSFS_platformEnumerateFiles(d, omitSymLinks);
free(d);
return(retval);
} /* DIR_enumerateFiles */
static int DIR_exists(DirHandle *h, const char *name)
{
char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
int retval;
BAIL_IF_MACRO(f == NULL, NULL, 0);
retval = __PHYSFS_platformExists(f);
free(f);
return(retval);
} /* DIR_exists */
static int DIR_isDirectory(DirHandle *h, const char *name, int *fileExists)
{
char *d = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
int retval = 0;
BAIL_IF_MACRO(d == NULL, NULL, 0);
*fileExists = __PHYSFS_platformExists(d);
if (*fileExists)
retval = __PHYSFS_platformIsDirectory(d);
free(d);
return(retval);
} /* DIR_isDirectory */
static int DIR_isSymLink(DirHandle *h, const char *name, int *fileExists)
{
char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
int retval = 0;
BAIL_IF_MACRO(f == NULL, NULL, 0);
*fileExists = __PHYSFS_platformExists(f);
if (*fileExists)
retval = __PHYSFS_platformIsSymLink(f);
free(f);
return(retval);
} /* DIR_isSymLink */
static PHYSFS_sint64 DIR_getLastModTime(DirHandle *h,
const char *name,
int *fileExists)
{
char *d = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
PHYSFS_sint64 retval = -1;
BAIL_IF_MACRO(d == NULL, NULL, 0);
*fileExists = __PHYSFS_platformExists(d);
if (*fileExists)
retval = __PHYSFS_platformGetLastModTime(d);
free(d);
return(retval);
} /* DIR_getLastModTime */
static FileHandle *doOpen(DirHandle *h, const char *name,
void *(*openFunc)(const char *filename),
int *fileExists, const FileFunctions *fileFuncs)
{
char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
void *rc;
FileHandle *retval;
BAIL_IF_MACRO(f == NULL, NULL, NULL);
if (fileExists != NULL)
{
*fileExists = __PHYSFS_platformExists(f);
if (!(*fileExists))
{
free(f);
return(NULL);
} /* if */
} /* if */
retval = (FileHandle *) malloc(sizeof (FileHandle));
if (!retval)
{
free(f);
BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
} /* if */
rc = openFunc(f);
free(f);
if (!rc)
{
free(retval);
return(NULL);
} /* if */
retval->opaque = (void *) rc;
retval->dirHandle = h;
retval->funcs = fileFuncs;
return(retval);
} /* doOpen */
static FileHandle *DIR_openRead(DirHandle *h, const char *fnm, int *exist)
{
return(doOpen(h, fnm, __PHYSFS_platformOpenRead, exist,
&__PHYSFS_FileFunctions_DIR));
} /* DIR_openRead */
static FileHandle *DIR_openWrite(DirHandle *h, const char *filename)
{
return(doOpen(h, filename, __PHYSFS_platformOpenWrite, NULL,
&__PHYSFS_FileFunctions_DIRW));
} /* DIR_openWrite */
static FileHandle *DIR_openAppend(DirHandle *h, const char *filename)
{
return(doOpen(h, filename, __PHYSFS_platformOpenAppend, NULL,
&__PHYSFS_FileFunctions_DIRW));
} /* DIR_openAppend */
static int DIR_remove(DirHandle *h, const char *name)
{
char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
int retval;
BAIL_IF_MACRO(f == NULL, NULL, 0);
retval = __PHYSFS_platformDelete(f);
free(f);
return(retval);
} /* DIR_remove */
static int DIR_mkdir(DirHandle *h, const char *name)
{
char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
int retval;
BAIL_IF_MACRO(f == NULL, NULL, 0);
retval = __PHYSFS_platformMkDir(f);
free(f);
return(retval);
} /* DIR_mkdir */
static void DIR_dirClose(DirHandle *h)
{
free(h->opaque);
free(h);
} /* DIR_dirClose */
/* end of dir.c ... */
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