ftoa()

static void fl::string_functions::ftoa ( float value, char * buffer, int precision = 2 )

static

Definition at line 29 of file str.cpp.

                                                               {
 
#ifdef FASTLED_TESTING
    // use snprintf during testing with precision
    snprintf(buffer, 64, "%.*f", precision, value);
    return;
 
#else
    // Handle negative values
    if (value < 0) {
        *buffer++ = '-';
        value = -value;
    }
 
    // Extract integer part
    u32 intPart = (u32)value;
 
    // Convert integer part to string (reversed)
    char intBuf[12]; // Enough for 32-bit integers
    int i = 0;
    do {
        intBuf[i++] = '0' + (intPart % 10);
        intPart /= 10;
    } while (intPart);
 
    // Write integer part in correct order
    while (i--) {
        *buffer++ = intBuf[i];
    }
 
    *buffer++ = '.'; // Decimal point
 
    // Extract fractional part
    float fracPart = value - (u32)value;
    for (int j = 0; j < precision; ++j) {
        fracPart *= 10.0f;
        int digit = (int)fracPart;
        *buffer++ = '0' + digit;
        fracPart -= digit;
    }
 
    *buffer = '\0'; // Null-terminate
#endif
}

References ftoa(), and fl::snprintf().

Referenced by ftoa().

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