home *** CD-ROM | disk | FTP | other *** search
- /*
- * sscanf.c --
- *
- * Source code for the "sscanf" library procedure.
- *
- * Copyright 1988 Regents of the University of California
- * Permission to use, copy, modify, and distribute this
- * software and its documentation for any purpose and without
- * fee is hereby granted, provided that the above copyright
- * notice appear in all copies. The University of California
- * makes no representations about the suitability of this
- * software for any purpose. It is provided "as is" without
- * express or implied warranty.
- */
-
- #ifndef lint
- static char rcsid[] = "$Header: /sprite/src/lib/c/stdio/RCS/sscanf.c,v 1.8 90/09/11 14:27:26 kupfer Exp $ SPRITE (Berkeley)";
- #endif not lint
-
- #include <stdio.h>
- #include <string.h>
- #include <varargs.h>
- #include <cfuncproto.h>
-
- #ifndef lint
-
- /*
- * Forward declarations:
- */
- static void StringReadProc _ARGS_((FILE *stream));
-
-
- /*
- *----------------------------------------------------------------------
- *
- * StringReadProc --
- *
- * This procedure is invoked when an attempt is made to read
- * past the end of a string. It returns an end-of-file
- * condition.
- *
- * Results:
- * None.
- *
- * Side effects:
- * The stream is marked with an end-of-file condition.
- *
- *----------------------------------------------------------------------
- */
-
- static void
- StringReadProc(stream)
- register FILE *stream;
- {
- stream->readCount = 0;
- stream->flags |= STDIO_EOF;
- }
-
- /*
- *----------------------------------------------------------------------
- *
- * sscanf --
- *
- * Same as scanf, except take input from a string rather than
- * an I/O stream.
- *
- * Results:
- * The values indicated by va_alist are modified to hold
- * information scanned from string. The return value is the
- * number of fields successfully scanned, or EOF if the string
- * is empty.
- *
- * Side effects:
- * None.
- *
- *----------------------------------------------------------------------
- */
-
- int
- sscanf(va_alist)
- va_dcl /* char *string, then char *format, then any
- * number of pointers to values to be scanned
- * from string under control of format. */
- {
- char *string;
- char *format;
- FILE stream;
- va_list args;
-
- va_start(args);
- string = va_arg(args, char *);
- format = va_arg(args, char *);
- Stdio_Setup(&stream, 1, 0, (unsigned char *)string, strlen(string),
- StringReadProc, (void (*)()) 0, (int (*)()) 0, (ClientData) 0);
- stream.readCount = strlen(string);
- return vfscanf(&stream, format, args);
- }
- #else
- /* VARARGS2 */
- /* ARGSUSED */
- int
- sscanf(string, format)
- char *string;
- char *format;
- {
- return 0;
- }
- #endif lint
-