func yaml_emitter_analyze_scalar()

in yaml/emitterc.go [1009:1155]

• 135 lines of code
• 44 McCabe index (conditional complexity)

func yaml_emitter_analyze_scalar(emitter *yaml_emitter_t, value []byte) bool {
	var (
		block_indicators   = false
		flow_indicators    = false
		line_breaks        = false
		special_characters = false

		leading_space  = false
		leading_break  = false
		trailing_space = false
		trailing_break = false
		break_space    = false
		space_break    = false

		preceeded_by_whitespace = false
		followed_by_whitespace  = false
		previous_space          = false
		previous_break          = false
	)

	emitter.scalar_data.value = value

	if len(value) == 0 {
		emitter.scalar_data.multiline = false
		emitter.scalar_data.flow_plain_allowed = false
		emitter.scalar_data.block_plain_allowed = true
		emitter.scalar_data.single_quoted_allowed = true
		emitter.scalar_data.block_allowed = false
		return true
	}

	if len(value) >= 3 && ((value[0] == '-' && value[1] == '-' && value[2] == '-') || (value[0] == '.' && value[1] == '.' && value[2] == '.')) {
		block_indicators = true
		flow_indicators = true
	}

	preceeded_by_whitespace = true
	for i, w := 0, 0; i < len(value); i += w {
		w = width(value[i])
		followed_by_whitespace = i+w >= len(value) || is_blank(value, i+w)

		if i == 0 {
			switch value[i] {
			case '#', ',', '[', ']', '{', '}', '&', '*', '!', '|', '>', '\'', '"', '%', '@', '`':
				flow_indicators = true
				block_indicators = true
			case '?', ':':
				flow_indicators = true
				if followed_by_whitespace {
					block_indicators = true
				}
			case '-':
				if followed_by_whitespace {
					flow_indicators = true
					block_indicators = true
				}
			}
		} else {
			switch value[i] {
			case ',', '?', '[', ']', '{', '}':
				flow_indicators = true
			case ':':
				flow_indicators = true
				if followed_by_whitespace {
					block_indicators = true
				}
			case '#':
				if preceeded_by_whitespace {
					flow_indicators = true
					block_indicators = true
				}
			}
		}

		if !is_printable(value, i) || !is_ascii(value, i) && !emitter.unicode {
			special_characters = true
		}
		if is_space(value, i) {
			if i == 0 {
				leading_space = true
			}
			if i+width(value[i]) == len(value) {
				trailing_space = true
			}
			if previous_break {
				break_space = true
			}
			previous_space = true
			previous_break = false
		} else if is_break(value, i) {
			line_breaks = true
			if i == 0 {
				leading_break = true
			}
			if i+width(value[i]) == len(value) {
				trailing_break = true
			}
			if previous_space {
				space_break = true
			}
			previous_space = false
			previous_break = true
		} else {
			previous_space = false
			previous_break = false
		}

		// [Go]: Why 'z'? Couldn't be the end of the string as that's the loop condition.
		preceeded_by_whitespace = is_blankz(value, i)
	}

	emitter.scalar_data.multiline = line_breaks
	emitter.scalar_data.flow_plain_allowed = true
	emitter.scalar_data.block_plain_allowed = true
	emitter.scalar_data.single_quoted_allowed = true
	emitter.scalar_data.block_allowed = true

	if leading_space || leading_break || trailing_space || trailing_break {
		emitter.scalar_data.flow_plain_allowed = false
		emitter.scalar_data.block_plain_allowed = false
	}
	if trailing_space {
		emitter.scalar_data.block_allowed = false
	}
	if break_space {
		emitter.scalar_data.flow_plain_allowed = false
		emitter.scalar_data.block_plain_allowed = false
		emitter.scalar_data.single_quoted_allowed = false
	}
	if space_break || special_characters {
		emitter.scalar_data.flow_plain_allowed = false
		emitter.scalar_data.block_plain_allowed = false
		emitter.scalar_data.single_quoted_allowed = false
		emitter.scalar_data.block_allowed = false
	}
	if line_breaks {
		emitter.scalar_data.flow_plain_allowed = false
		emitter.scalar_data.block_plain_allowed = false
	}
	if flow_indicators {
		emitter.scalar_data.flow_plain_allowed = false
	}
	if block_indicators {
		emitter.scalar_data.block_plain_allowed = false
	}
	return true
}