From d9c06db60006e2191d8b86e34f651644a54426b4 Mon Sep 17 00:00:00 2001
From: tmk <nobody@nowhere>
Date: Tue, 14 May 2013 16:16:57 +0900
Subject: Add xprintf(xitoa) from elm-chan.org

---
 common/xprintf.h | 103 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 common/xprintf.h

(limited to 'common/xprintf.h')

diff --git a/common/xprintf.h b/common/xprintf.h
new file mode 100644
index 000000000..cddec9940
--- /dev/null
+++ b/common/xprintf.h
@@ -0,0 +1,103 @@
+/*---------------------------------------------------------------------------
+   Extended itoa, puts and printf                    (C)ChaN, 2011
+-----------------------------------------------------------------------------*/
+
+#ifndef XPRINTF_H
+#define XPRINTF_H
+
+#include <inttypes.h>
+#include <avr/pgmspace.h>
+
+extern void (*xfunc_out)(uint8_t);
+#define xdev_out(func) xfunc_out = (void(*)(uint8_t))(func)
+
+/* This is a pointer to user defined output function. It must be initialized
+   before using this modle.
+*/
+
+void xputc(char chr);
+
+/* This is a stub function to forward outputs to user defined output function.
+   All outputs from this module are output via this function.
+*/
+
+
+/*-----------------------------------------------------------------------------*/
+void xputs(const prog_char *string);
+
+/*  The string placed in the ROM is forwarded to xputc() directly.
+*/
+
+
+/*-----------------------------------------------------------------------------*/
+void xitoa(long value, char radix, char width);
+
+/* Extended itoa().
+
+      value  radix  width   output
+        100     10      6   "   100"
+        100     10     -6   "000100"
+        100     10      0   "100"
+ 4294967295     10      0   "4294967295"
+ 4294967295    -10      0   "-1"
+     655360     16     -8   "000A0000"
+       1024     16      0   "400"
+       0x55      2     -8   "01010101"
+*/
+
+
+/*-----------------------------------------------------------------------------*/
+#define xprintf(format, ...)            __xprintf(PSTR(format), ##__VA_ARGS__)
+#define xsprintf(str, format, ...)      __xsprintf(str, PSTR(format), ##__VA_ARGS__)
+#define xfprintf(func, format, ...)     __xfprintf(func, PSTR(format), ##__VA_ARGS__)
+
+void __xprintf(const prog_char *format, ...);	/* Send formatted string to the registered device */
+void __xsprintf(char*, const prog_char *format, ...);	/* Put formatted string to the memory */
+void __xfprintf(void(*func)(uint8_t), const prog_char *format, ...); /* Send formatted string to the specified device */
+
+/* Format string is placed in the ROM. The format flags is similar to printf().
+
+   %[flag][width][size]type
+
+   flag
+     A '0' means filled with '0' when output is shorter than width.
+     ' ' is used in default. This is effective only numeral type.
+   width
+     Minimum width in decimal number. This is effective only numeral type.
+     Default width is zero.
+   size
+     A 'l' means the argument is long(32bit). Default is short(16bit).
+     This is effective only numeral type.
+   type
+     'c' : Character, argument is the value
+     's' : String placed on the RAM, argument is the pointer
+     'S' : String placed on the ROM, argument is the pointer
+     'd' : Signed decimal, argument is the value
+     'u' : Unsigned decimal, argument is the value
+     'X' : Hexdecimal, argument is the value
+     'b' : Binary, argument is the value
+     '%' : '%'
+
+*/
+
+
+/*-----------------------------------------------------------------------------*/
+char xatoi(char **str, long *ret);
+
+/* Get value of the numeral string. 
+
+  str
+    Pointer to pointer to source string
+
+    "0b11001010" binary
+    "0377" octal
+    "0xff800" hexdecimal
+    "1250000" decimal
+    "-25000" decimal
+
+  ret
+    Pointer to return value
+*/
+
+#endif
+
-- 
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