274 lines
8.4 KiB
C
274 lines
8.4 KiB
C
/*
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* Internal function/structure declaration. Do NOT include in your
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* application.
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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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#ifndef _INCLUDE_PHYSFS_INTERNAL_H_
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#define _INCLUDE_PHYSFS_INTERNAL_H_
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#ifndef __PHYSICSFS_INTERNAL__
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#error Do not include this header from your applications.
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#endif
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struct __PHYSFS_DIRREADER__;
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struct __PHYSFS_FILEFUNCTIONS__;
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typedef struct __PHYSFS_FILEHANDLE__
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{
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/*
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* This is reserved for the driver to store information.
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*/
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void *opaque;
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/*
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* This should be the DirHandle that created this FileHandle.
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*/
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const struct __PHYSFS_DIRREADER__ *dirReader;
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/*
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* Pointer to the file i/o functions for this filehandle.
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*/
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const struct __PHYSFS_FILEFUNCTIONS__ *funcs;
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} FileHandle;
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typedef struct __PHYSFS_FILEFUNCTIONS__
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{
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/*
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* Read more from the file.
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*/
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int (*read)(FileHandle *handle, void *buffer,
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unsigned int objSize, unsigned int objCount);
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/*
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* Write more to the file. Archives don't have to implement this.
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* (Set it to NULL if not implemented).
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*/
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int (*write)(FileHandle *handle, void *buffer,
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unsigned int objSize, unsigned int objCount);
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/*
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* Returns non-zero if at end of file.
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*/
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int (*eof)(FileHandle *handle);
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/*
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* Returns byte offset from start of file.
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*/
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int (*tell)(FileHandle *handle);
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/*
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* Move read/write pointer to byte offset from start of file.
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* Returns non-zero on success, zero on error.
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*/
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int (*seek)(FileHandle *handle, int offset);
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/*
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* Close the file, and free the FileHandle structure (including "opaque").
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*/
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int (*close)(FileHandle *handle);
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} FileFunctions;
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typedef struct __PHYSFS_DIRREADER__
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{
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/*
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* This is reserved for the driver to store information.
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*/
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void *opaque;
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/*
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* Pointer to the directory i/o functions for this reader.
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*/
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const struct __PHYSFS_DIRFUNCTIONS__ *funcs;
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} DirHandle;
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typedef struct __PHYSFS_LINKEDSTRINGLIST__
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{
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char *str;
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struct __PHYSFS_LINKEDSTRINGLIST__ *next;
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} LinkedStringList;
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/*
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* Symlinks should always be followed; PhysicsFS will use
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* DirFunctions->isSymLink() and make a judgement on whether to
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* continue to call other methods based on that.
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*/
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typedef struct __PHYSFS_DIRFUNCTIONS__
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{
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/*
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* Returns non-zero if (filename) is a valid archive that this
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* driver can handle. This filename is in platform-dependent
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* notation.
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*/
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int (*isArchive)(const char *filename);
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/*
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* Return a DirHandle for dir/archive (name).
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* This filename is in platform-dependent notation.
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* return (NULL) on error.
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*/
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DirHandle *(*openArchive)(const char *name);
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/*
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* Returns a list of all files in dirname. Each element of this list
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* (and its "str" field) will be deallocated with the system's free()
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* function by the caller, so be sure to explicitly malloc() each
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* chunk.
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* If you have a memory failure, return as much as you can.
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* This dirname is in platform-independent notation.
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*/
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LinkedStringList **(*enumerateFiles)(DirHandle *r, const char *dirname);
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/*
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* Returns non-zero if filename is really a directory.
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* This filename is in platform-independent notation.
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*/
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int (*isDirectory)(DirHandle *r, const char *name);
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/*
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* Returns non-zero if filename is really a symlink.
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* This filename is in platform-independent notation.
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*/
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int (*isSymLink)(DirHandle *r, const char *name);
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/*
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* Returns non-zero if filename can be opened for reading.
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* This filename is in platform-independent notation.
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*/
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int (*isOpenable)(DirHandle *r, const char *name);
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/*
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* Open file for reading, and return a FileHandle.
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* This filename is in platform-independent notation.
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*/
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FileHandle *(*openRead)(DirHandle *r, const char *filename);
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/*
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* Open file for writing, and return a FileHandle.
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* This filename is in platform-independent notation.
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* This method may be NULL.
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*/
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FileHandle *(*openWrite)(DirHandle *r, const char *filename);
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/*
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* Open file for appending, and return a FileHandle.
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* This filename is in platform-independent notation.
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* This method may be NULL.
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*/
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FileHandle *(*openAppend)(DirHandle *r, const char *filename);
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/*
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* Close directories/archives, and free the handle, including
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* the "opaque" entry. This should assume that it won't be called if
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* there are still files open from this DirHandle.
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*/
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void (*close)(DirHandle *r);
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} DirFunctions;
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/* error messages... */
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#define ERR_IS_INITIALIZED "Already initialized"
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#define ERR_NOT_INITIALIZED "Not initialized"
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#define ERR_INVALID_ARGUMENT "Invalid argument"
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#define ERR_FILES_OPEN_READ "Files still open for reading"
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#define ERR_FILES_OPEN_WRITE "Files still open for writing"
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#define ERR_NO_DIR_CREATE "Failed to create directories"
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#define ERR_OUT_OF_MEMORY "Out of memory"
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#define ERR_NOT_IN_SEARCH_PATH "No such entry in search path"
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#define ERR_NOT_SUPPORTED "Operation not supported"
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#define ERR_UNSUPPORTED_ARCHIVE "Archive type unsupported"
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/*
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* Call this to set the message returned by PHYSFS_getLastError().
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* Please only use the ERR_* constants above, or add new constants to the
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* above group, but I want these all in one place.
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*/
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void __PHYSFS_setError(const char *err);
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/* This gets used all over for lessening code clutter. */
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#define BAIL_IF_MACRO(c, e, r) if (c) { __PHYSFS_setError(e); return(r); }
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/*--------------------------------------------------------------------------*/
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/*--------------------------------------------------------------------------*/
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/*------------ ----------------*/
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/*------------ You MUST implement the following functions ----------------*/
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/*------------ if porting to a new platform. ----------------*/
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/*------------ (see unix.c for an example) ----------------*/
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/*------------ ----------------*/
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/*--------------------------------------------------------------------------*/
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/*--------------------------------------------------------------------------*/
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/*
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* The dir separator; "/" on unix, "\\" on win32, ":" on MacOS, etc...
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* Obviously, this isn't a function, but it IS a null-terminated string.
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*/
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extern const char *__PHYSFS_PlatformDirSeparator;
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/*
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* Platform implementation of PHYSFS_getCdRomDirs()...
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* See physfs.h. The retval should be freeable via PHYSFS_freeList().
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*/
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char **__PHYSFS_platformDetectAvailableCDs(void);
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/*
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* Calculate the base dir, if your platform needs special consideration.
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* Just return NULL if the standard routines will suffice. (see
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* calculateBaseDir() in physfs.c ...)
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* Caller will free() the retval if it's not NULL.
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*/
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char *__PHYSFS_platformCalcBaseDir(char *argv0);
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/*
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* Get the platform-specific user name.
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* Caller will free() the retval if it's not NULL. If it's NULL, the username
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* will default to "default".
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*/
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char *__PHYSFS_platformGetUserName(void);
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/*
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* Get the platform-specific user dir.
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* Caller will free() the retval if it's not NULL. If it's NULL, the userdir
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* will default to basedir/username.
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*/
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char *__PHYSFS_platformGetUserDir(void);
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/*
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* Return a number that uniquely identifies the current thread.
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* On a platform without threading, (1) will suffice. These numbers are
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* arbitrary; the only requirement is that no two threads have the same
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* number.
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*/
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int __PHYSFS_platformGetThreadID(void);
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/*
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* This is a pass-through to whatever stricmp() is called on your platform.
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*/
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int __PHYSFS_platformStricmp(const char *str1, const char *str2);
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/*
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* Return non-zero if filename (in platform-dependent notation) is a symlink.
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*/
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int __PHYSFS_platformIsSymlink(const char *fname);
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#ifdef __cplusplus
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extern "C" {
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#endif
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#endif
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/* end of physfs_internal.h ... */
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