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