-/* This is the main function called by atoi(), atol() and atoll(). */
-_PDCLIB_intmax_t _PDCLIB_atomax( const char * s );
-
-/* Two helper functions used by strtol(), strtoul() and long long variants. */
-const char * _PDCLIB_strtox_prelim( const char * p, char * sign, int * base );
-_PDCLIB_uintmax_t _PDCLIB_strtox_main( const char ** p, unsigned int base, _PDCLIB_uintmax_t error, _PDCLIB_uintmax_t limval, _PDCLIB_uintmax_t limdigit, char * sign );
-
-/* Digits array used by various integer conversion functions in <stdlib.h> */
-extern char _PDCLIB_digits[];
+/* Flags for representing mode (see fopen()). Note these must fit the same
+ status field as the _IO?BF flags in <stdio.h> and the internal flags below.
+*/
+#define _PDCLIB_FREAD 8u
+#define _PDCLIB_FWRITE 16u
+#define _PDCLIB_FAPPEND 32u
+#define _PDCLIB_FRW 64u
+#define _PDCLIB_FBIN 128u
+
+/* Internal flags, made to fit the same status field as the flags above. */
+#define _PDCLIB_WROTELAST 256u
+#define _PDCLIB_LIBBUFFER 512u
+#define _PDCLIB_VIRGINSTR 1024u
+#define _PDCLIB_ERRORFLAG 2048u
+#define _PDCLIB_EOFFLAG 4096u
+
+struct _PDCLIB_file_t
+{
+ _PDCLIB_fd_t handle; /* OS-specific file descriptor */
+ _PDCLIB_fpos_t position; /* file position indicator */
+ char * buffer; /* file buffer */
+ _PDCLIB_size_t bufsize; /* size of buffer */
+ _PDCLIB_size_t bufidx; /* pointer into buffer */
+ unsigned int status; /* misc. status bits */
+ /*mbstate_t mbstate; multibyte parse state - TODO: Unmask. */
+ struct _PDCLIB_file_t * next; /* provisions for linked list handling */
+};