From 34b2a78c7c59a3357d05dfff157908d5d9b98501 Mon Sep 17 00:00:00 2001
From: lottaviano <lottaviano@38d2e660-2303-0410-9eaa-f027e97ec537>
Date: Thu, 17 Sep 2009 10:29:29 +0000
Subject: [PATCH] Use configuration value for formatter bufsize.

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@2962 38d2e660-2303-0410-9eaa-f027e97ec537
---
 bertos/cfg/cfg_formatwr.h | 10 ++++++++++
 bertos/mware/formatwr.c   | 27 ++++++++++++++++++---------
 2 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/bertos/cfg/cfg_formatwr.h b/bertos/cfg/cfg_formatwr.h
index bafad70b..ba08654c 100644
--- a/bertos/cfg/cfg_formatwr.h
+++ b/bertos/cfg/cfg_formatwr.h
@@ -52,6 +52,16 @@
  */
 #define CONFIG_PRINTF PRINTF_FULL
 
+/**
+ * Size of buffer to format "%" sequences in printf.
+ *
+ * Warning: no check on buffer size is done when formatting, be careful especially
+ * with big numbers and %f formatting.
+ *
+ * $WIZ$ type = "int"
+ * $WIZ$ min = 4
+ */
+#define CONFIG_FRMWRI_BUFSIZE  20
 
 #endif /* CFG_FORMATWR_H */
 
diff --git a/bertos/mware/formatwr.c b/bertos/mware/formatwr.c
index bf2672e9..afc4976e 100644
--- a/bertos/mware/formatwr.c
+++ b/bertos/mware/formatwr.c
@@ -106,16 +106,25 @@
 	/* Maximum precision for floating point values */
 	typedef long double max_float_t;
 
-	/*luca: FIXME: this should be enough to print floating point values, must be investigated
-	 * further.
-	 */
-	#define FRMWRI_BUFSIZE 20
+	#warning FIXME: be sure to fix buffer size below
+	#if CONFIG_FRMWRI_BUFSIZE
+		#define FRMWRI_BUFSIZE CONFIG_FRMWRI_BUFSIZE
+	#else
+		/* Conservative estimate. Max float is 3.40282e+038, so %f (but not %e or %g) must have
+		 * space for: sign + all 38 digits + '.' + 6 decimal digits (default)
+		 */
+		#define FRMWRI_BUFSIZE 50
+	#endif
 #else
-	/*
-	 * Conservative estimate. Should be (probably) 12 (which is the size necessary
-	 * to represent (2^32-1) in octal plus the sign bit.
-	 */
-	#define FRMWRI_BUFSIZE 16
+	#if CONFIG_FRMWRI_BUFSIZE
+		#define FRMWRI_BUFSIZE CONFIG_FRMWRI_BUFSIZE
+	#else
+		/*
+		 * Conservative estimate. Should be (probably) 12 (which is the size necessary
+		 * to represent (2^32-1) in octal plus the sign bit.
+		 */
+		#define FRMWRI_BUFSIZE 16
+	#endif
 #endif
 
 /* Probably useful for fancy microcontrollers such as the PIC, nobody knows. */
-- 
2.25.1