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Fix #24137 Different number of leading zeros on MINGW printf("%lg") 

Use _set_output_format() on MINGW platform to force _snprintf_s() to
conform to the C99 standard and match the other platforms.

Fixes #24137
3.2
Jamie Pate 2019-11-05 13:04:04 +07:00
parent 245c99175c
commit bdb7adecfb
1 changed files with 10 additions and 0 deletions
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10
core/ustring.cpp
Unescape Escape View File

@ -1337,7 +1337,17 @@ String String::num_scientific(double p_num) {
char buf[256];
#if defined(__GNUC__) || defined(_MSC_VER)
#if (defined(__MINGW32__) || (defined(_MSC_VER) && _MSC_VER < 1900)) && defined(_TWO_DIGIT_EXPONENT)
// MinGW and old MSC require _set_output_format() to conform to C99 output for printf
unsigned int old_exponent_format = _set_output_format(_TWO_DIGIT_EXPONENT);
#endif
snprintf(buf, 256, "%lg", p_num);
#if (defined(__MINGW32__) || (defined(_MSC_VER) && _MSC_VER < 1900)) && defined(_TWO_DIGIT_EXPONENT)
_set_output_format(old_exponent_format);
#endif
#else
sprintf(buf, "%.16lg", p_num);
#endif