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lv_math: lv_math_num_to_str: return with buf

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This commit is contained in:
Gabor Kiss-Vamosi 2018-03-07 13:10:20 +01:00
parent 19f98ce8ea
commit 13351c0091
2 changed files with 12 additions and 3 deletions
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7
lv_misc/lv_math.c
View File

@ -37,14 +37,15 @@
* Convert a number to string
* @param num a number
* @param buf pointer to a `char` buffer. The result will be stored here (max 10 elements)
* @return same as `buf` (just for convenience)
*/
void lv_math_num_to_str(int32_t num, char * buf)
char * lv_math_num_to_str(int32_t num, char * buf)
{
char * buf_ori = buf;
if(num == 0) {
buf[0] = '0';
buf[1] = '\0';
return;
return buf;
} else if(num < 0) {
(*buf) = '-';
buf++;
@ -85,6 +86,8 @@ void lv_math_num_to_str(int32_t num, char * buf)
}
(*buf) = '\0';
return buf_ori;
}
/**********************

8
lv_misc/lv_math.h
View File

@ -31,7 +31,13 @@ extern "C" {
/**********************
* GLOBAL PROTOTYPES
**********************/
void lv_math_num_to_str(int32_t num, char * buf);
/**
* Convert a number to string
* @param num a number
* @param buf pointer to a `char` buffer. The result will be stored here (max 10 elements)
* @return same as `buf` (just for convenience)
*/
char * lv_math_num_to_str(int32_t num, char * buf);
/**********************
* MACROS