+const char * parse_out( const char * spec, struct status_t * status );
+inline void test( size_t n, const char * expect, ... );
+int _PDCLIB_sprintf( char * buffer, size_t n, const char * format, va_list ap );
+
+/* The following only for testing. */
+#include <limits.h>
+#include <string.h>
+
+int main( void )
+{
+ puts( "- Signed min / max -\n" );
+ test( SIZE_MAX, "%hhd", CHAR_MIN );
+ test( SIZE_MAX, "%hhd", CHAR_MAX );
+ test( SIZE_MAX, "%hhd", 0 );
+ test( SIZE_MAX, "%hd", SHRT_MIN );
+ test( SIZE_MAX, "%hd", SHRT_MAX );
+ test( SIZE_MAX, "%hd", 0 );
+ test( SIZE_MAX, "%d", INT_MIN );
+ test( SIZE_MAX, "%d", INT_MAX );
+ test( SIZE_MAX, "%d", 0 );
+ test( SIZE_MAX, "%ld", LONG_MIN );
+ test( SIZE_MAX, "%ld", LONG_MAX );
+ test( SIZE_MAX, "%ld", 0l );
+ test( SIZE_MAX, "%lld", LLONG_MIN );
+ test( SIZE_MAX, "%lld", LLONG_MAX );
+ test( SIZE_MAX, "%lld", 0ll );
+ puts( "- Unsigned min / max -\n" );
+ test( SIZE_MAX, "%hhu", UCHAR_MAX );
+ test( SIZE_MAX, "%hhu", (unsigned char)-1 );
+ test( SIZE_MAX, "%hu", USHRT_MAX );
+ test( SIZE_MAX, "%hu", (unsigned short)-1 );
+ test( SIZE_MAX, "%u", UINT_MAX );
+ test( SIZE_MAX, "%u", -1u );
+ test( SIZE_MAX, "%lu", ULONG_MAX );
+ test( SIZE_MAX, "%lu", -1ul );
+ test( SIZE_MAX, "%llu", ULLONG_MAX );
+ test( SIZE_MAX, "%llu", -1ull );
+ puts( "- Hex and Octal, normal and alternative, upper and lowercase -\n" );
+ test( SIZE_MAX, "%X", UINT_MAX );
+ test( SIZE_MAX, "%#X", -1u );
+ test( SIZE_MAX, "%x", UINT_MAX );
+ test( SIZE_MAX, "%#x", -1u );
+ test( SIZE_MAX, "%o", UINT_MAX );
+ test( SIZE_MAX, "%#o", -1u );
+ puts( "- Plus flag -\n" );
+ test( SIZE_MAX, "%+d", INT_MIN );
+ test( SIZE_MAX, "%+d", INT_MAX );
+ test( SIZE_MAX, "%+d", 0 );
+ test( SIZE_MAX, "%+u", UINT_MAX );
+ test( SIZE_MAX, "%+u", -1u );
+ puts( "- Space flag -\n" );
+ test( SIZE_MAX, "% d", INT_MIN );
+ test( SIZE_MAX, "% d", INT_MAX );
+ test( SIZE_MAX, "% d", 0 );
+ test( SIZE_MAX, "% u", UINT_MAX );
+ test( SIZE_MAX, "% u", -1u );
+ puts( "- Field width -\n" );
+ test( SIZE_MAX, "%9d", INT_MIN );
+ test( SIZE_MAX, "%9d", INT_MAX );
+ test( SIZE_MAX, "%10d", INT_MIN );
+ test( SIZE_MAX, "%10d", INT_MAX );
+ test( SIZE_MAX, "%11d", INT_MIN );
+ test( SIZE_MAX, "%11d", INT_MAX );
+ test( SIZE_MAX, "%12d", INT_MIN );
+ test( SIZE_MAX, "%12d", INT_MAX );
+ puts( "- Field width (left bound) -\n" );
+ test( SIZE_MAX, "%-9d", INT_MIN );
+ test( SIZE_MAX, "%-9d", INT_MAX );
+ test( SIZE_MAX, "%-10d", INT_MIN );
+ test( SIZE_MAX, "%-10d", INT_MAX );
+ test( SIZE_MAX, "%-11d", INT_MIN );
+ test( SIZE_MAX, "%-11d", INT_MAX );
+ test( SIZE_MAX, "%-12d", INT_MIN );
+ test( SIZE_MAX, "%-12d", INT_MAX );
+ puts( "- Field width, zero padding -\n");
+ test( SIZE_MAX, "%09d", INT_MIN );
+ test( SIZE_MAX, "%09d", INT_MAX );
+ test( SIZE_MAX, "%010d", INT_MIN );
+ test( SIZE_MAX, "%010d", INT_MAX );
+ test( SIZE_MAX, "%011d", INT_MIN );
+ test( SIZE_MAX, "%011d", INT_MAX );
+ test( SIZE_MAX, "%012d", INT_MIN );
+ test( SIZE_MAX, "%012d", INT_MAX );
+ puts( "- Field width, zero padding (left bound) -\n" );
+ test( SIZE_MAX, "%-09d", INT_MIN );
+ test( SIZE_MAX, "%-09d", INT_MAX );
+ test( SIZE_MAX, "%-010d", INT_MIN );
+ test( SIZE_MAX, "%-010d", INT_MAX );
+ test( SIZE_MAX, "%-011d", INT_MIN );
+ test( SIZE_MAX, "%-011d", INT_MAX );
+ test( SIZE_MAX, "%-012d", INT_MIN );
+ test( SIZE_MAX, "%-012d", INT_MAX );
+ puts( "- Limited n -\n" );
+ test( 8, "%9d", INT_MAX );
+ test( 8, "%9d", INT_MIN );
+ test( 9, "%9d", INT_MAX );
+ test( 9, "%9d", INT_MIN );
+ test( 10, "%9d", INT_MAX );
+ test( 10, "%9d", INT_MIN );
+ test( 9, "%10d", INT_MAX );
+ test( 9, "%10d", INT_MIN );
+ test( 10, "%10d", INT_MAX );
+ test( 10, "%10d", INT_MIN );
+ test( 11, "%10d", INT_MAX );
+ test( 11, "%10d", INT_MIN );
+ test( 10, "%11d", INT_MAX );
+ test( 10, "%11d", INT_MIN );
+ test( 11, "%11d", INT_MAX );
+ test( 11, "%11d", INT_MIN );
+ test( 12, "%11d", INT_MAX );
+ test( 12, "%11d", INT_MIN );
+ test( 11, "%12d", INT_MAX );
+ test( 11, "%12d", INT_MIN );
+ test( 12, "%12d", INT_MAX );
+ test( 12, "%12d", INT_MIN );
+ test( 13, "%12d", INT_MAX );
+ test( 13, "%12d", INT_MIN );
+ puts( "- Precision -\n" );
+ test( SIZE_MAX, "%030.20d", INT_MAX );
+ test( SIZE_MAX, "%.6x", UINT_MAX );
+ test( SIZE_MAX, "%#6.3x", UINT_MAX );
+ test( SIZE_MAX, "%#3.6x", UINT_MAX );
+ test( SIZE_MAX, "%.6d", INT_MIN );
+ test( SIZE_MAX, "%6.3d", INT_MIN );
+ test( SIZE_MAX, "%3.6d", INT_MIN );
+ test( SIZE_MAX, "%#0.6x", UINT_MAX );
+ test( SIZE_MAX, "%#06.3x", UINT_MAX );
+ test( SIZE_MAX, "%#03.6x", UINT_MAX );
+ test( SIZE_MAX, "%#0.6d", INT_MAX );
+ test( SIZE_MAX, "%#06.3d", INT_MAX );
+ test( SIZE_MAX, "%#03.6d", INT_MAX );
+ test( SIZE_MAX, "%#+.6d", INT_MAX );
+ test( SIZE_MAX, "%#+6.3d", INT_MAX );
+ test( SIZE_MAX, "%#+3.6d", INT_MAX );
+ test( SIZE_MAX, "%+0.6d", INT_MAX );
+ test( SIZE_MAX, "%+06.3d", INT_MAX );
+ test( SIZE_MAX, "%+03.6d", INT_MAX );
+ return 0;
+}
+
+/* This macro delivers a given character to either a memory buffer or a stream,
+ depending on the contents of 'status' (struct status_t).
+ x - the character to be delivered