Add _cbprintf/_vcbprintf (callback based printf formatters)

[pdclib.old] / internals / _PDCLIB_int.h

diff --git a/internals/_PDCLIB_int.h b/internals/_PDCLIB_int.h
index 9ff9e69e321b3a1809747449bed85d697984e1ed..c200419e6133a0235fd92448066744cdf83db6d6 100644 (file)
--- a/internals/_PDCLIB_int.h
+++ b/internals/_PDCLIB_int.h
@@ -309,29 +309,13 @@ _PDCLIB_uintmax_t _PDCLIB_strtox_main( const char ** p, unsigned int base, _PDCL
 extern char _PDCLIB_digits[];
 extern char _PDCLIB_Xdigits[];
 
-/* -------------------------------------------------------------------------- */
-/* errno                                                                      */
-/* -------------------------------------------------------------------------- */
-
-/* If PDCLib would call its error number "errno" directly, there would be no way
-   to catch its value from underlying system calls that also use it (i.e., POSIX
-   operating systems). That is why we use an internal name, providing a means to
-   access it through <errno.h>.
-*/
-extern int _PDCLIB_errno;
-
-/* A mechanism for delayed evaluation. (Not sure if this is really necessary, so
-   no detailed documentation on the "why".)
-*/
-int * _PDCLIB_errno_func( void ) _PDCLIB_nothrow;
-
 /* -------------------------------------------------------------------------- */
 /* locale / wchar / uchar                                                     */
 /* -------------------------------------------------------------------------- */
 
 #ifndef __cplusplus
-typedef _PDCLIB_int16_t         _PDCLIB_char16_t;
-typedef _PDCLIB_int32_t         _PDCLIB_char32_t;
+typedef _PDCLIB_uint16_t        _PDCLIB_char16_t;
+typedef _PDCLIB_uint32_t        _PDCLIB_char32_t;
 #else
 typedef char16_t                _PDCLIB_char16_t;
 typedef char32_t                _PDCLIB_char32_t;
@@ -354,13 +338,13 @@ typedef struct _PDCLIB_mbstate {
      */
     _PDCLIB_uint16_t     _Surrogate;
 
-    /* In cases where the underlying codec is capable of regurgitating a 
+    /* In cases where the underlying codec is capable of regurgitating a
      * character without consuming any extra input (e.g. a surrogate pair in a
-     * UCS-4 to UTF-16 conversion) then these fields are used to track that 
+     * UCS-4 to UTF-16 conversion) then these fields are used to track that
      * state. In particular, they are used to buffer/fake the input for mbrtowc
      * and similar functions.
      *
-     * See _PDCLIB_encoding.h for values of _PendState and the resultant value 
+     * See _PDCLIB_encoding.h for values of _PendState and the resultant value
      * in _PendChar.
      */
     unsigned char _PendState;
@@ -391,17 +375,26 @@ typedef struct _PDCLIB_file     _PDCLIB_file_t; // Rename to _PDCLIB_FILE?
 /* Status structure required by _PDCLIB_print(). */
 struct _PDCLIB_status_t
 {
+    /* XXX This structure is horrible now. scanf needs its own */
+
     int              base;   /* base to which the value shall be converted   */
     _PDCLIB_int_fast32_t flags; /* flags and length modifiers                */
-    unsigned         n;      /* print: maximum characters to be written      */
+    unsigned         n;      /* print: maximum characters to be written (snprintf) */
                              /* scan:  number matched conversion specifiers  */
     unsigned         i;      /* number of characters read/written            */
     unsigned         current;/* chars read/written in the CURRENT conversion */
-    char *           s;      /* *sprintf(): target buffer                    */
-                             /* *sscanf():  source string                    */
     unsigned         width;  /* specified field width                        */
     int              prec;   /* specified field precision                    */
-    _PDCLIB_file_t * stream; /* *fprintf() / *fscanf() stream         */
+
+    union {
+        void *           ctx;    /* context for callback */
+        const char *     s;      /* input string for scanf */
+    };
+
+    union {
+        _PDCLIB_size_t ( *write ) ( void *p, const char *buf, _PDCLIB_size_t size );
+        _PDCLIB_file_t *stream;  /* for scanf */
+    };
     _PDCLIB_va_list  arg;    /* argument stack                               */
 };