add printf/dologf

[netwatch.git] / lib / sprintf.c

diff --git a/lib/sprintf.c b/lib/sprintf.c
new file mode 100644 (file)
index 0000000..8d58d6b
--- /dev/null
+++ b/lib/sprintf.c
@@ -0,0 +1,102 @@
+/* 
+ * Mach Operating System
+ * Copyright (c) 1991,1990,1989 Carnegie Mellon University
+ * All Rights Reserved.
+ * 
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ * 
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ * 
+ * Carnegie Mellon requests users of this software to return to
+ * 
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ * 
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+
+#include <stdarg.h>
+#include "doprnt.h"
+
+#define SPRINTF_UNLIMITED -1
+struct sprintf_state {
+      char *buf;
+      unsigned int len;
+      unsigned int max;
+};
+
+static void
+savechar(char *arg, int c)
+{
+       struct sprintf_state *state = (struct sprintf_state *)arg;
+       
+       if (state->max != SPRINTF_UNLIMITED)
+       {
+               if (state->len == state->max)
+                       return;
+       }
+
+       state->len++;
+       *state->buf = c;
+       state->buf++;
+}
+
+int vsprintf(char *s, const char *fmt, va_list args)
+{
+       struct sprintf_state state;
+       state.max = SPRINTF_UNLIMITED;
+       state.len = 0;
+       state.buf = s;
+
+       _doprnt(fmt, args, 0, (void (*)()) savechar, (char *) &state);
+       *(state.buf) = '\0';
+
+       return state.len;
+}
+
+int vsnprintf(char *s, int size, const char *fmt, va_list args)
+{
+       struct sprintf_state state;
+       state.max = size;
+       state.len = 0;
+       state.buf = s;
+
+       _doprnt(fmt, args, 0, (void (*)()) savechar, (char *) &state);
+       *(state.buf) = '\0';
+
+       return state.len;
+}
+
+int sprintf(char *s, const char *fmt, ...)
+{
+       va_list args;
+       int err;
+
+       va_start(args, fmt);
+       err = vsprintf(s, fmt, args);
+       va_end(args);
+
+       return err;
+}
+
+int snprintf(char *s, int size, const char *fmt, ...)
+{
+       va_list args;
+       int err;
+
+       va_start(args, fmt);
+       err = vsnprintf(s, size, fmt, args);
+       va_end(args);
+
+       return err;
+}
+