package httpbearer

// There could be more of these characters:
//
// • "\t"   i.e,. horizontal tab (␉)
// • " "    i.e., space (␠)
// • "\r\n" i.e., carriage return (␍), line feed (␊)
//
// We will consume them (and ignore them) if they are there.
func trimleft(value string) string {

	for {
		if len(value) <= 0 {
			return value
		}

		c0 := value[0]

		switch c0 {
		case ' ','\t':
			value = value[1:]
			// Nothing else here. We got LWSP-char. So we will continue.
		case '\r':
			if len(value) < 2 {
				return value
			}
			c1 := value[1]
			if '\n' != c1 {
				return value
			}
			value = value[2:]
			// Nothing else here. We got "\r\n". So we will continue.
		default:
			return value
		}
	}
}