Completed _scanf.c, added vsscanf.c, rewrote sscanf.c.

Added an assembler include _file.inc and changed asm code that uses struct
FILE to be independent of its size.
Fixed return codes in several files to use EOF instead of -1.


git-svn-id: svn://svn.cc65.org/cc65/trunk@1205 b7a2c559-68d2-44c3-8de9-860c34a00d81

libsrc/common/vsscanf.c

@@ -0,0 +1,51 @@
+/*
+ * vsscanf.c
+ *
+ * (C) Copyright 2002 Ullrich von Bassewitz (uz@cc65.org)
+ *
+ */
+
+
+
+#include <stdio.h>
+#include "_scanf.h"
+
+
+
+/*****************************************************************************/
+/*     	    	     		     Code				     */
+/*****************************************************************************/
+
+
+
+static char get (struct indesc* d)
+/* Read a character from the input string and return it */
+{
+    char C;
+    if (C = d->buf[d->ridx]) {
+	/* Increment index only if end not reached */
+	++d->ridx;
+    }
+    return C;
+}
+
+
+
+int vsscanf (const char* str, const char* format, va_list ap)
+/* Standard C function */
+{
+    struct indesc id;
+
+    /* Initialize the indesc struct. We leave all fields uninitialized that we
+     * don't need
+     */
+    id.fin  = (infunc) get;
+    id.buf  = (char*) str;
+    id.ridx = 0;
+
+    /* Call the internal function and return the result */
+    return _scanf (&id, format, ap);
+}
+
+
+