func yaml_emitter_write_double_quoted_scalar()

in yaml/emitterc.go [1454:1573]

• 115 lines of code
• 49 McCabe index (conditional complexity)

func yaml_emitter_write_double_quoted_scalar(emitter *yaml_emitter_t, value []byte, allow_breaks bool) bool {
	spaces := false
	if !yaml_emitter_write_indicator(emitter, []byte{'"'}, true, false, false) {
		return false
	}

	for i := 0; i < len(value); {
		if !is_printable(value, i) || (!emitter.unicode && !is_ascii(value, i)) ||
			is_bom(value, i) || is_break(value, i) ||
			value[i] == '"' || value[i] == '\\' {

			octet := value[i]

			var w int
			var v rune
			switch {
			case octet&0x80 == 0x00:
				w, v = 1, rune(octet&0x7F)
			case octet&0xE0 == 0xC0:
				w, v = 2, rune(octet&0x1F)
			case octet&0xF0 == 0xE0:
				w, v = 3, rune(octet&0x0F)
			case octet&0xF8 == 0xF0:
				w, v = 4, rune(octet&0x07)
			}
			for k := 1; k < w; k++ {
				octet = value[i+k]
				v = (v << 6) + (rune(octet) & 0x3F)
			}
			i += w

			if !put(emitter, '\\') {
				return false
			}

			var ok bool
			switch v {
			case 0x00:
				ok = put(emitter, '0')
			case 0x07:
				ok = put(emitter, 'a')
			case 0x08:
				ok = put(emitter, 'b')
			case 0x09:
				ok = put(emitter, 't')
			case 0x0A:
				ok = put(emitter, 'n')
			case 0x0b:
				ok = put(emitter, 'v')
			case 0x0c:
				ok = put(emitter, 'f')
			case 0x0d:
				ok = put(emitter, 'r')
			case 0x1b:
				ok = put(emitter, 'e')
			case 0x22:
				ok = put(emitter, '"')
			case 0x5c:
				ok = put(emitter, '\\')
			case 0x85:
				ok = put(emitter, 'N')
			case 0xA0:
				ok = put(emitter, '_')
			case 0x2028:
				ok = put(emitter, 'L')
			case 0x2029:
				ok = put(emitter, 'P')
			default:
				if v <= 0xFF {
					ok = put(emitter, 'x')
					w = 2
				} else if v <= 0xFFFF {
					ok = put(emitter, 'u')
					w = 4
				} else {
					ok = put(emitter, 'U')
					w = 8
				}
				for k := (w - 1) * 4; ok && k >= 0; k -= 4 {
					digit := byte((v >> uint(k)) & 0x0F)
					if digit < 10 {
						ok = put(emitter, digit+'0')
					} else {
						ok = put(emitter, digit+'A'-10)
					}
				}
			}
			if !ok {
				return false
			}
			spaces = false
		} else if is_space(value, i) {
			if allow_breaks && !spaces && emitter.column > emitter.best_width && i > 0 && i < len(value)-1 {
				if !yaml_emitter_write_indent(emitter) {
					return false
				}
				if is_space(value, i+1) {
					if !put(emitter, '\\') {
						return false
					}
				}
				i += width(value[i])
			} else if !write(emitter, value, &i) {
				return false
			}
			spaces = true
		} else {
			if !write(emitter, value, &i) {
				return false
			}
			spaces = false
		}
	}
	if !yaml_emitter_write_indicator(emitter, []byte{'"'}, false, false, false) {
		return false
	}
	emitter.whitespace = false
	emitter.indention = false
	return true
}