From 1cb05d007d8bdbb70b9c46fbc184deb871ab5d94 Mon Sep 17 00:00:00 2001 From: Alan Carvalho de Assis Date: Wed, 19 Oct 2016 14:26:48 -0600 Subject: [PATCH] Add some less-than-perfect macros to provide some implementation of strtof() and strtold() --- include/stdlib.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/include/stdlib.h b/include/stdlib.h index 83eb7dd886..1d45291f1a 100644 --- a/include/stdlib.h +++ b/include/stdlib.h @@ -80,6 +80,19 @@ # define environ get_environ_ptr() #endif +/* The functions strtof() and strtold() are not currently implemented in + * NuttX. Ideally, custom implementations of these functions to be provided: + * + * strtof() - Some MCUs, such as the Cortex-M4F, have built in 32-bit FPU. + * A true implementation could exploit the improved performance by the + * the FPU. + * strtold() - Of course, there is a lost of 32-bits of accuracy in this + * conversion. + */ + +#define strtof(a,b) (float)strtod(a,b) +#define strtold(a,b) (long double)strtod(a,b) + /**************************************************************************** * Public Type Definitions ****************************************************************************/