static void _PrintUnsigned()

in Firmware/Segger/SEGGER_RTT_printf.c [137:221]

• 67 lines of code
• 21 McCabe index (conditional complexity)

static void _PrintUnsigned(SEGGER_RTT_PRINTF_DESC * pBufferDesc, unsigned v, unsigned Base, unsigned NumDigits, unsigned FieldWidth, unsigned FormatFlags) {
  static const char _aV2C[16] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
  unsigned Div;
  unsigned Digit;
  unsigned Number;
  unsigned Width;
  char c;

  Number = v;
  Digit = 1u;
  //
  // Get actual field width
  //
  Width = 1u;
  while (Number >= Base) {
    Number = (Number / Base);
    Width++;
  }
  if (NumDigits > Width) {
    Width = NumDigits;
  }
  //
  // Print leading chars if necessary
  //
  if ((FormatFlags & FORMAT_FLAG_LEFT_JUSTIFY) == 0u) {
    if (FieldWidth != 0u) {
      if (((FormatFlags & FORMAT_FLAG_PAD_ZERO) == FORMAT_FLAG_PAD_ZERO) && (NumDigits == 0u)) {
        c = '0';
      } else {
        c = ' ';
      }
      while ((FieldWidth != 0u) && (Width < FieldWidth)) {
        FieldWidth--;
        _StoreChar(pBufferDesc, c);
        if (pBufferDesc->ReturnValue < 0) {
          break;
        }
      }
    }
  }
  if (pBufferDesc->ReturnValue >= 0) {
    //
    // Compute Digit.
    // Loop until Digit has the value of the highest digit required.
    // Example: If the output is 345 (Base 10), loop 2 times until Digit is 100.
    //
    while (1) {
      if (NumDigits > 1u) {       // User specified a min number of digits to print? => Make sure we loop at least that often, before checking anything else (> 1 check avoids problems with NumDigits being signed / unsigned)
        NumDigits--;
      } else {
        Div = v / Digit;
        if (Div < Base) {        // Is our divider big enough to extract the highest digit from value? => Done
          break;
        }
      }
      Digit *= Base;
    }
    //
    // Output digits
    //
    do {
      Div = v / Digit;
      v -= Div * Digit;
      _StoreChar(pBufferDesc, _aV2C[Div]);
      if (pBufferDesc->ReturnValue < 0) {
        break;
      }
      Digit /= Base;
    } while (Digit);
    //
    // Print trailing spaces if necessary
    //
    if ((FormatFlags & FORMAT_FLAG_LEFT_JUSTIFY) == FORMAT_FLAG_LEFT_JUSTIFY) {
      if (FieldWidth != 0u) {
        while ((FieldWidth != 0u) && (Width < FieldWidth)) {
          FieldWidth--;
          _StoreChar(pBufferDesc, ' ');
          if (pBufferDesc->ReturnValue < 0) {
            break;
          }
        }
      }
    }
  }
}