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libs: fix visual studio Compiler Error C2124

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D:\code\incubator-nuttx\libs\libc\stdlib\lib_strtof.c(76,1): error C2124: divide or mod by zero

Windows MSVC restrictions, MSVC doesn't allow division through a
zero literal, but allows it through non-const variable set to zero

Reference:
https://docs.microsoft.com/en-us/cpp/error-messages/compiler-errors-1/compiler-error-c2124?view=msvc-170

Signed-off-by: chao.an <anchao@xiaomi.com>
This commit is contained in:
chao.an 2022-08-24 13:51:15 +08:00 committed by Xiang Xiao
parent c77743c463
commit 0e6edd39ec
1 changed files with 13 additions and 2 deletions
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15
libs/libc/stdlib/lib_strtof.c
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@ -73,7 +73,12 @@
static inline int is_real(float x) static inline int is_real(float x)
{ {
const float infinite = 1.0F / 0.0F; /* NOTE: Windows MSVC restrictions, MSVC doesn't allow division through a
* zero literal, but allows it through non-const variable set to zero
*/
float divzero = 0.0F;
const float infinite = 1.0F / divzero;
return (x < infinite) && (x >= -infinite); return (x < infinite) && (x >= -infinite);
} }
@ -99,7 +104,13 @@ float strtof(FAR const char *str, FAR char **endptr)
int n; int n;
int num_digits; int num_digits;
int num_decimals; int num_decimals;
const float infinite = 1.0F / 0.0F;
/* NOTE: Windows MSVC restrictions, MSVC doesn't allow division through a
* zero literal, but allows it through non-const variable set to zero
*/
float divzero = 0.0F;
const float infinite = 1.0F / divzero;
/* Skip leading whitespace */ /* Skip leading whitespace */