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prefix 0x to printing hex values (optional)

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proddy
2020-10-17 16:56:28 +02:00
parent 07b8c3bb25
commit 1b1b1e6cee
2 changed files with 8 additions and 3 deletions
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9
src/helpers.cpp
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@@ -23,8 +23,13 @@ namespace emsesp {
uint8_t Helpers::bool_format_ = BOOL_FORMAT_ONOFF; // on/off
// like itoa but for hex, and quicker
char * Helpers::hextoa(char * result, const uint8_t value) {
char * p = result;
// only for single byte hex values
char * Helpers::hextoa(char * result, const uint8_t value, bool prefix) {
char * p = result;
if (prefix) {
*p++ = '0';
*p++ = 'x';
}
uint8_t nib1 = (value >> 4) & 0x0F;
uint8_t nib2 = (value >> 0) & 0x0F;
*p++ = nib1 < 0xA ? '0' + nib1 : 'A' + nib1 - 0xA;