341 lines
8.7 KiB
C
341 lines
8.7 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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#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 "physfs.h"
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#define __PHYSICSFS_INTERNAL__
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#include "physfs_internal.h"
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extern const DirFunctions __PHYSFS_DirFunctions_DIR;
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static const FileFunctions __PHYSFS_FileFunctions_DIR;
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static const FileFunctions __PHYSFS_FileFunctions_DIRW;
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static int DIR_read(FileHandle *handle, void *buffer,
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unsigned int objSize, unsigned int objCount)
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{
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FILE *h = (FILE *) (handle->opaque);
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int retval;
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errno = 0;
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retval = fread(buffer, objSize, objCount, h);
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BAIL_IF_MACRO((retval < objCount) && (ferror(h)),strerror(errno),retval);
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return(retval);
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} /* DIR_read */
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static int DIR_write(FileHandle *handle, void *buffer,
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unsigned int objSize, unsigned int objCount)
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{
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FILE *h = (FILE *) (handle->opaque);
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int retval;
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errno = 0;
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retval = fwrite(buffer, objSize, objCount, h);
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if ( (retval < objCount) && (ferror(h)) )
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__PHYSFS_setError(strerror(errno));
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return(retval);
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} /* DIR_write */
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static int DIR_eof(FileHandle *handle)
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{
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return(feof((FILE *) (handle->opaque)));
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} /* DIR_eof */
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static int DIR_tell(FileHandle *handle)
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{
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return(ftell((FILE *) (handle->opaque)));
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} /* DIR_tell */
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static int DIR_seek(FileHandle *handle, int offset)
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{
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return(fseek((FILE *) (handle->opaque), offset, SEEK_SET) == 0);
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} /* DIR_seek */
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static int DIR_fileLength(FileHandle *handle)
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{
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return(__PHYSFS_platformFileLength((FILE *) (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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FILE *h = (FILE *) (handle->opaque);
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/*
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* we manually fflush() the buffer, since that's the place fclose() 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. fflush() failures we can recover from.
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*/
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/* keep trying until there's success or an unrecoverable error... */
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do {
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__PHYSFS_platformTimeslice();
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errno = 0;
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} while ( (fflush(h) == EOF) && ((errno == EAGAIN) || (errno == EINTR)) );
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/* EBADF == "Not open for writing". That's fine. */
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BAIL_IF_MACRO((errno != 0) && (errno != EBADF), strerror(errno), 0);
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/* if fclose fails anyhow, we just have to pray that it's still usable. */
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errno = 0;
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BAIL_IF_MACRO(fclose(h) == EOF, strerror(errno), 0); /* (*shrug*) */
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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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int namelen = strlen(name);
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int 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 = 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_IF_MACRO(1, 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)
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{
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char *d = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
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int retval;
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BAIL_IF_MACRO(d == NULL, NULL, 0);
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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)
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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); /* !!! might be a problem. */
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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 FileHandle *doOpen(DirHandle *h, const char *name, const char *mode)
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{
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char *f = __PHYSFS_platformCvtToDependent((char *)(h->opaque), name, NULL);
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FILE *rc;
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FileHandle *retval;
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char *str;
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BAIL_IF_MACRO(f == NULL, NULL, NULL);
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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_IF_MACRO(1, ERR_OUT_OF_MEMORY, NULL);
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} /* if */
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errno = 0;
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rc = fopen(f, mode);
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str = strerror(errno);
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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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BAIL_IF_MACRO(1, str, 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 = &__PHYSFS_FileFunctions_DIR;
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return(retval);
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} /* doOpen */
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static FileHandle *DIR_openRead(DirHandle *h, const char *filename)
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{
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return(doOpen(h, filename, "rb"));
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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, "wb"));
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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, "ab"));
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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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errno = 0;
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retval = (remove(f) == 0);
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if (!retval)
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__PHYSFS_setError(strerror(errno));
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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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errno = 0;
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retval = (mkdir(f, S_IRWXU) == 0);
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if (!retval)
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__PHYSFS_setError(strerror(errno));
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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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static const FileFunctions __PHYSFS_FileFunctions_DIR =
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{
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DIR_read, /* read() method */
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NULL, /* 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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NULL, /* 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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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_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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/* This doesn't get listed, since it's technically not an archive... */
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#if 0
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const PHYSFS_ArchiveInfo __PHYSFS_ArchiveInfo_DIR =
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{
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"DIR",
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"non-archive directory I/O",
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"Ryan C. Gordon",
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"http://www.icculus.org/",
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};
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#endif
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/* end of dir.c ... */
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