kern/fmt new module

This module replaces kern/sprintf, and also implements sscanf functions.

1 files changed, 73 insertions, 0 deletions

diff --git a/kern/fmt.h b/kern/fmt.h
new file mode 100644
index 0000000..a339ed4
--- /dev/null
+++ b/kern/fmt.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2010-2017 Richard Braun.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *
+ * Formatted string functions.
+ *
+ * The functions provided by this module implement a subset of the standard
+ * sprintf- and sscanf-like functions.
+ *
+ * sprintf:
+ *  - flags: # 0 - ' ' (space) +
+ *  - field width is supported
+ *  - precision is supported
+ *
+ * sscanf:
+ *  - flags: *
+ *  - field width is supported
+ *
+ * common:
+ *  - modifiers: hh h l ll z t
+ *  - specifiers: d i o u x X c s p n %
+ *
+ *
+ * Upstream site with license notes :
+ * http://git.sceen.net/rbraun/librbraun.git/
+ */
+
+#ifndef _FMT_H
+#define _FMT_H
+
+#include <stdarg.h>
+#include <stddef.h>
+
+int fmt_sprintf(char *str, const char *format, ...)
+    __attribute__((format(printf, 2, 3)));
+
+int fmt_vsprintf(char *str, const char *format, va_list ap)
+    __attribute__((format(printf, 2, 0)));
+
+int fmt_snprintf(char *str, size_t size, const char *format, ...)
+    __attribute__((format(printf, 3, 4)));
+
+int fmt_vsnprintf(char *str, size_t size, const char *format, va_list ap)
+    __attribute__((format(printf, 3, 0)));
+
+int fmt_sscanf(const char *str, const char *format, ...)
+    __attribute__((format(scanf, 2, 3)));
+
+int fmt_vsscanf(const char *str, const char *format, va_list ap)
+    __attribute__((format(scanf, 2, 0)));
+
+#endif /* _FMT_H */