static unsigned char convert()

in src/sha1convert.h [9:32]

• 24 lines of code
• 17 McCabe index (conditional complexity)

static unsigned char convert(int ch) {
  switch (ch) {
  default:
    __builtin_unreachable();
  case '0':
  case '1':
  case '2':
  case '3':
  case '4':
  case '5':
  case '6':
  case '7':
  case '8':
  case '9':
    return ch - '0';
  case 'a':
  case 'b':
  case 'c':
  case 'd':
  case 'e':
  case 'f':
    return ch - 'a' + 10;
  }
}