On altos, the primitive input function is ao_getchar, not getchar

[fw/pdclib] / internals / _PDCLIB_glue.h

diff --git a/internals/_PDCLIB_glue.h b/internals/_PDCLIB_glue.h
index f390dfaa84bf773169b516a89596e46133fa603b..3c5872bcbeab7744d215b9b765d78e9cc72ab684 100644 (file)
--- a/internals/_PDCLIB_glue.h
+++ b/internals/_PDCLIB_glue.h
@@ -18,6 +18,8 @@
 /* They operate on data types partially defined by _PDCLIB_config.h.          */
 /* -------------------------------------------------------------------------- */
 
+/* stdlib.h */
+
 /* A system call that terminates the calling process, returning a given status
    to the environment.
 */
@@ -30,20 +32,31 @@ void _PDCLIB_Exit( int status ) _PDCLIB_NORETURN;
 */
 void * _PDCLIB_allocpages( int n );
 
-/* A system call that opens a file identified by name in a given mode, and
-   returns a file descriptor uniquely identifying that file.
+
+/* stdio.h */
+
+/* A system call that opens a file identified by name in a given mode. Return 
+   a file descriptor uniquely identifying that file.
+   (The mode is the return value of the _PDCLIB_filemode() function.)
 */
 _PDCLIB_fd_t _PDCLIB_open( char const * const filename, unsigned int mode );
 
-/* A system call that writes n characters to a file identified by given file
-   descriptor. Return the number of characters written.
+/* A system call that writes a stream's buffer.
+   Returns 0 on success, EOF on write error.
+   Sets stream error flags and errno appropriately on error.
 */
-_PDCLIB_size_t _PDCLIB_write( _PDCLIB_fd_t fd, char const * buffer, _PDCLIB_size_t n );
+int _PDCLIB_flushbuffer( struct _PDCLIB_file_t * stream );
 
-/* A system call that reads n characters into a buffer, from a file identified
-   by given file descriptor. Return the number of characters read.
+/* A system call that fills a stream's buffer.
+   Returns 0 on success, EOF on read error / EOF.
+   Sets stream EOF / error flags and errno appropriately on error.
 */
-_PDCLIB_size_t _PDCLIB_read( _PDCLIB_fd_t fd, char * buffer, _PDCLIB_size_t n );
+int _PDCLIB_fillbuffer( struct _PDCLIB_file_t * stream );
+
+/* A system call that repositions within a file. Returns new offset on success,
+   -1 / errno on error.
+*/
+_PDCLIB_int64_t _PDCLIB_seek( struct _PDCLIB_file_t * stream, _PDCLIB_int64_t offset, int whence );
 
 /* A system call that closes a file identified by given file descriptor. Return
    zero on success, non-zero otherwise.
@@ -57,6 +70,8 @@ int _PDCLIB_remove( const char * filename );
 
 /* A system call that renames a file from given old name to given new name.
    Return zero on success, non-zero otherwise. In case of failure, the file
-   must still be accessible by old name.
+   must still be accessible by old name. Any handling of open files etc. is
+   done by standard rename() already.
 */
 int _PDCLIB_rename( const char * old, const char * new );
+