+
+/* -------------------------------------------------------------------------- */
+/* Declaration of helper functions (implemented in functions/_PDCLIB). */
+/* -------------------------------------------------------------------------- */
+
+/* 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[];
+
+/* -------------------------------------------------------------------------- */
+/* Internal data types */
+/* -------------------------------------------------------------------------- */
+
+/* Structure required by both atexit() and exit() for handling atexit functions */
+struct _PDCLIB_exitfunc_t
+{
+ struct _PDCLIB_exitfunc_t * next;
+ void (*func)( void );
+};
+
+/* Structures required by malloc(), realloc(), and free(). */
+struct _PDCLIB_headnode_t
+{
+ struct _PDCLIB_memnode_t * first;
+ struct _PDCLIB_memnode_t * last;
+};
+
+struct _PDCLIB_memnode_t
+{
+ _PDCLIB_size_t size;
+ struct _PDCLIB_memnode_t * next;
+};
+
+#if 0
+
+/* fpos_t, an object type (not an array!) capable of storing any position
+ information of a file.
+*/
+typedef unsigned long long int _PDCLIB_fpos_t;
+
+/* file descriptor - a type used by the OS to identify a stream */
+typedef int _PDCLIB_fd_t;
+
+#endif