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bertos/mware/sprintf.c

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+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2002, 2004, 2005 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \brief sprintf() implementation based on _formatted_write()
+ *
+ * \author Bernie Innocenti <bernie@codewiz.org>
+ *
+ * $WIZ$ module_name = "sprintf"
+ * $WIZ$ module_depends = "formatwr"
+ * $WIZ$ module_harvard = "both"
+ */
+
+#include <mware/formatwr.h>
+#include <cpu/pgm.h>
+#include <cfg/compiler.h>
+
+#include <stdio.h>
+
+
+static void __str_put_char(char c, void *ptr)
+{
+	/*
+	 * This Does not work on Code Warrior. Hmm...
+	 *	*(*((char **)ptr))++ = c;
+	 */
+
+	**((char **)ptr) = c;
+	(*((char **)ptr))++;
+}
+
+static void __null_put_char(UNUSED_ARG(char, c), UNUSED_ARG(void *, ptr))
+{
+	/* nop */
+}
+
+
+int PGM_FUNC(vsprintf)(char *str, const char * PGM_ATTR fmt, va_list ap)
+{
+	int result;
+
+	if (str)
+	{
+		result = PGM_FUNC(_formatted_write)(fmt, __str_put_char, &str, ap);
+
+		/* Terminate string */
+		*str = '\0';
+	}
+	else
+		result = PGM_FUNC(_formatted_write)(fmt, __null_put_char, 0, ap);
+
+
+	return result;
+}
+
+
+int PGM_FUNC(sprintf)(char *str, const char * fmt, ...)
+{
+	int result;
+	va_list ap;
+
+	va_start(ap, fmt);
+	result = PGM_FUNC(vsprintf)(str, fmt, ap);
+	va_end(ap);
+
+	return result;
+}
+
+/**
+ * State information for __sn_put_char()
+ */
+struct __sn_state
+{
+	char *str;
+	size_t len;
+};
+
+/**
+ * formatted_write() callback used [v]snprintf().
+ */
+static void __sn_put_char(char c, void *ptr)
+{
+	struct __sn_state *state = (struct __sn_state *)ptr;
+
+	if (state->len)
+	{
+		--state->len;
+		*state->str++ = c;
+	}
+}
+
+
+int PGM_FUNC(vsnprintf)(char *str, size_t size, const char * PGM_ATTR fmt, va_list ap)
+{
+	int result = 0;
+
+	/* Make room for traling '\0'. */
+	if (size--)
+	{
+		if (str)
+		{
+			struct __sn_state state;
+			state.str = str;
+			state.len = size;
+
+			result = PGM_FUNC(_formatted_write)(fmt, __sn_put_char, &state, ap);
+
+			/* Terminate string. */
+			*state.str = '\0';
+		}
+		else
+			result = PGM_FUNC(_formatted_write)(fmt, __null_put_char, 0, ap);
+	}
+
+	return result;
+}
+
+
+int PGM_FUNC(snprintf)(char *str, size_t size, const char * fmt, ...)
+{
+	int result;
+	va_list ap;
+
+	va_start(ap, fmt);
+	result = PGM_FUNC(vsnprintf)(str, size, fmt, ap);
+	va_end(ap);
+
+	return result;
+}