Use configuration value for formatter bufsize.

[bertos.git] / bertos / mware / formatwr.c

diff --git a/bertos/mware/formatwr.c b/bertos/mware/formatwr.c
index bf2672e9c1a29b5642671cdb682a68c83312fc6e..afc4976e269af94db0ec05c25d731364fa8e0101 100644 (file)
--- 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. */