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Use copy of va_list rather than original va_list in txt_set_text_vfmt (#1890)

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Fix issue #1886

Co-authored-by: Wenting Zhang <zephray@outlook.com>
This commit is contained in:
Gabor Kiss-Vamosi
2020-11-09 13:13:18 +01:00
committed by GitHub
parent 85c5e786a4
commit b3c9096830
1 changed files with 5 additions and 1 deletions
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6
src/lv_misc/lv_txt.c
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@@ -483,7 +483,11 @@ void _lv_txt_cut(char * txt, uint32_t pos, uint32_t len)
char * _lv_txt_set_text_vfmt(const char * fmt, va_list ap)
{
/*Allocate space for the new text by using trick from C99 standard section 7.19.6.12 */
uint32_t len = lv_vsnprintf(NULL, 0, fmt, ap);
va_list ap_copy;
va_copy(ap_copy, ap);
uint32_t len = lv_vsnprintf(NULL, 0, fmt, ap_copy);
va_end(ap_copy);
char * text = 0;
#if LV_USE_ARABIC_PERSIAN_CHARS
/*Put together the text according to the format string*/