Imported libSDF into VOID tree

external/libsdf/libSDF/stdio.h

@@ -0,0 +1,35 @@
+/* This file is a replacement for the few parts of stdio.h */
+/* that are assumed by the output of lex and yacc. */
+/* It is here because lex's output contains #include "stdio.h"  */
+/* and we don't want to be contaminated by the system stdio.h */
+
+#ifndef MYSTDIOdotH
+#define MYSTDIOdotH
+#include "mpmy_io.h"
+
+/* These are replacements for stdio */
+#undef getc
+#define getc(fp) SDF_Hdrgetc()
+/* Putc is used by 'output'.  This is the easiest way to deal with it */
+#undef putc
+#define putc(c, fp) (Msg_do("%c", c))
+#undef FILE
+#define FILE MPMYFile
+#undef stdin
+#define stdin NULL
+#undef stdout
+#define stdout NULL
+#undef stderr
+#define stderr NULL
+#undef EOF
+#define EOF (-1)
+#undef BUFSIZ
+#define BUFSIZ 512
+
+/* A couple of prototypes that are in stdio are also needed */
+#include <stdarg.h>
+int sscanf(const char *, const char *, ...);
+int vsprintf(char *, const char *, va_list);
+int sprintf(char *, const char *, ...);
+
+#endif