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Use Grisu2 algorithm in String::num_scientific to fix serializing

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This commit is contained in:
Aaron Franke
2024-11-01 02:02:09 -07:00
parent 4a44078451
commit 15de1d6c35
29 changed files with 1560 additions and 200 deletions
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34
core/string/ustring.cpp
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@@ -43,6 +43,8 @@
#include "core/variant/variant.h"
#include "core/version_generated.gen.h"
#include "thirdparty/grisu2/grisu2.h"
#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS // to disable build-time warning which suggested to use strcpy_s instead strcpy
#endif
@@ -1656,28 +1658,18 @@ String String::num_scientific(double p_num) {
if (Math::is_nan(p_num) || Math::is_inf(p_num)) {
return num(p_num, 0);
}
char buffer[256];
char *last = grisu2::to_chars(buffer, p_num);
return String::ascii(Span(buffer, last - buffer));
}
char buf[256];
#if defined(__GNUC__) || defined(_MSC_VER)
#if defined(__MINGW32__) && defined(_TWO_DIGIT_EXPONENT) && !defined(_UCRT)
// MinGW requires _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(_TWO_DIGIT_EXPONENT) && !defined(_UCRT)
_set_output_format(old_exponent_format);
#endif
#else
sprintf(buf, "%.16lg", p_num);
#endif
buf[255] = 0;
return buf;
String String::num_scientific(float p_num) {
if (Math::is_nan(p_num) || Math::is_inf(p_num)) {
return num(p_num, 0);
}
char buffer[256];
char *last = grisu2::to_chars(buffer, p_num);
return String::ascii(Span(buffer, last - buffer));
}
String String::md5(const uint8_t *p_md5) {