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use fixed-size buffer in RedirectablePrint::vprintf() (#1622)

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Co-authored-by: Peter Lawrence <12226419+majbthrd@users.noreply.github.com>
Co-authored-by: Garth Vander Houwen <garthvh@yahoo.com>
Co-authored-by: Ben Meadors <benmmeadors@gmail.com>
This commit is contained in:
majbthrd
2022-08-12 13:41:16 -05:00
committed by GitHub
parent 64f852e3f7
commit f66c8572b4
2 changed files with 4 additions and 15 deletions
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15
src/RedirectablePrint.cpp
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@@ -38,20 +38,13 @@ size_t RedirectablePrint::write(uint8_t c)
size_t RedirectablePrint::vprintf(const char *format, va_list arg)
{
va_list copy;
static char printBuf[160];
va_copy(copy, arg);
int len = vsnprintf(printBuf, printBufLen, format, copy);
int len = vsnprintf(printBuf, sizeof(printBuf), format, copy);
va_end(copy);
if (len < 0) {
va_end(arg);
return 0;
};
if (len >= (int)printBufLen) {
delete[] printBuf;
printBufLen *= 2;
printBuf = new char[printBufLen];
len = vsnprintf(printBuf, printBufLen, format, arg);
}
if (len < 0) return 0;
len = Print::write(printBuf, len);
return len;