vendor/github.com/pelletier/go-toml/v2/scanner.go
changeset 265 05c40b36d3b2
parent 264 8f478162d991
child 266 80973a656b81
--- a/vendor/github.com/pelletier/go-toml/v2/scanner.go	Thu Sep 22 16:37:07 2022 +0200
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,269 +0,0 @@
-package toml
-
-func scanFollows(b []byte, pattern string) bool {
-	n := len(pattern)
-
-	return len(b) >= n && string(b[:n]) == pattern
-}
-
-func scanFollowsMultilineBasicStringDelimiter(b []byte) bool {
-	return scanFollows(b, `"""`)
-}
-
-func scanFollowsMultilineLiteralStringDelimiter(b []byte) bool {
-	return scanFollows(b, `'''`)
-}
-
-func scanFollowsTrue(b []byte) bool {
-	return scanFollows(b, `true`)
-}
-
-func scanFollowsFalse(b []byte) bool {
-	return scanFollows(b, `false`)
-}
-
-func scanFollowsInf(b []byte) bool {
-	return scanFollows(b, `inf`)
-}
-
-func scanFollowsNan(b []byte) bool {
-	return scanFollows(b, `nan`)
-}
-
-func scanUnquotedKey(b []byte) ([]byte, []byte) {
-	// unquoted-key = 1*( ALPHA / DIGIT / %x2D / %x5F ) ; A-Z / a-z / 0-9 / - / _
-	for i := 0; i < len(b); i++ {
-		if !isUnquotedKeyChar(b[i]) {
-			return b[:i], b[i:]
-		}
-	}
-
-	return b, b[len(b):]
-}
-
-func isUnquotedKeyChar(r byte) bool {
-	return (r >= 'A' && r <= 'Z') || (r >= 'a' && r <= 'z') || (r >= '0' && r <= '9') || r == '-' || r == '_'
-}
-
-func scanLiteralString(b []byte) ([]byte, []byte, error) {
-	// literal-string = apostrophe *literal-char apostrophe
-	// apostrophe = %x27 ; ' apostrophe
-	// literal-char = %x09 / %x20-26 / %x28-7E / non-ascii
-	for i := 1; i < len(b); {
-		switch b[i] {
-		case '\'':
-			return b[:i+1], b[i+1:], nil
-		case '\n', '\r':
-			return nil, nil, newDecodeError(b[i:i+1], "literal strings cannot have new lines")
-		}
-		size := utf8ValidNext(b[i:])
-		if size == 0 {
-			return nil, nil, newDecodeError(b[i:i+1], "invalid character")
-		}
-		i += size
-	}
-
-	return nil, nil, newDecodeError(b[len(b):], "unterminated literal string")
-}
-
-func scanMultilineLiteralString(b []byte) ([]byte, []byte, error) {
-	// ml-literal-string = ml-literal-string-delim [ newline ] ml-literal-body
-	// ml-literal-string-delim
-	// ml-literal-string-delim = 3apostrophe
-	// ml-literal-body = *mll-content *( mll-quotes 1*mll-content ) [ mll-quotes ]
-	//
-	// mll-content = mll-char / newline
-	// mll-char = %x09 / %x20-26 / %x28-7E / non-ascii
-	// mll-quotes = 1*2apostrophe
-	for i := 3; i < len(b); {
-		switch b[i] {
-		case '\'':
-			if scanFollowsMultilineLiteralStringDelimiter(b[i:]) {
-				i += 3
-
-				// At that point we found 3 apostrophe, and i is the
-				// index of the byte after the third one. The scanner
-				// needs to be eager, because there can be an extra 2
-				// apostrophe that can be accepted at the end of the
-				// string.
-
-				if i >= len(b) || b[i] != '\'' {
-					return b[:i], b[i:], nil
-				}
-				i++
-
-				if i >= len(b) || b[i] != '\'' {
-					return b[:i], b[i:], nil
-				}
-				i++
-
-				if i < len(b) && b[i] == '\'' {
-					return nil, nil, newDecodeError(b[i-3:i+1], "''' not allowed in multiline literal string")
-				}
-
-				return b[:i], b[i:], nil
-			}
-		case '\r':
-			if len(b) < i+2 {
-				return nil, nil, newDecodeError(b[len(b):], `need a \n after \r`)
-			}
-			if b[i+1] != '\n' {
-				return nil, nil, newDecodeError(b[i:i+2], `need a \n after \r`)
-			}
-			i += 2 // skip the \n
-			continue
-		}
-		size := utf8ValidNext(b[i:])
-		if size == 0 {
-			return nil, nil, newDecodeError(b[i:i+1], "invalid character")
-		}
-		i += size
-	}
-
-	return nil, nil, newDecodeError(b[len(b):], `multiline literal string not terminated by '''`)
-}
-
-func scanWindowsNewline(b []byte) ([]byte, []byte, error) {
-	const lenCRLF = 2
-	if len(b) < lenCRLF {
-		return nil, nil, newDecodeError(b, "windows new line expected")
-	}
-
-	if b[1] != '\n' {
-		return nil, nil, newDecodeError(b, `windows new line should be \r\n`)
-	}
-
-	return b[:lenCRLF], b[lenCRLF:], nil
-}
-
-func scanWhitespace(b []byte) ([]byte, []byte) {
-	for i := 0; i < len(b); i++ {
-		switch b[i] {
-		case ' ', '\t':
-			continue
-		default:
-			return b[:i], b[i:]
-		}
-	}
-
-	return b, b[len(b):]
-}
-
-//nolint:unparam
-func scanComment(b []byte) ([]byte, []byte, error) {
-	// comment-start-symbol = %x23 ; #
-	// non-ascii = %x80-D7FF / %xE000-10FFFF
-	// non-eol = %x09 / %x20-7F / non-ascii
-	//
-	// comment = comment-start-symbol *non-eol
-
-	for i := 1; i < len(b); {
-		if b[i] == '\n' {
-			return b[:i], b[i:], nil
-		}
-		if b[i] == '\r' {
-			if i+1 < len(b) && b[i+1] == '\n' {
-				return b[:i+1], b[i+1:], nil
-			}
-			return nil, nil, newDecodeError(b[i:i+1], "invalid character in comment")
-		}
-		size := utf8ValidNext(b[i:])
-		if size == 0 {
-			return nil, nil, newDecodeError(b[i:i+1], "invalid character in comment")
-		}
-
-		i += size
-	}
-
-	return b, b[len(b):], nil
-}
-
-func scanBasicString(b []byte) ([]byte, bool, []byte, error) {
-	// basic-string = quotation-mark *basic-char quotation-mark
-	// quotation-mark = %x22            ; "
-	// basic-char = basic-unescaped / escaped
-	// basic-unescaped = wschar / %x21 / %x23-5B / %x5D-7E / non-ascii
-	// escaped = escape escape-seq-char
-	escaped := false
-	i := 1
-
-	for ; i < len(b); i++ {
-		switch b[i] {
-		case '"':
-			return b[:i+1], escaped, b[i+1:], nil
-		case '\n', '\r':
-			return nil, escaped, nil, newDecodeError(b[i:i+1], "basic strings cannot have new lines")
-		case '\\':
-			if len(b) < i+2 {
-				return nil, escaped, nil, newDecodeError(b[i:i+1], "need a character after \\")
-			}
-			escaped = true
-			i++ // skip the next character
-		}
-	}
-
-	return nil, escaped, nil, newDecodeError(b[len(b):], `basic string not terminated by "`)
-}
-
-func scanMultilineBasicString(b []byte) ([]byte, bool, []byte, error) {
-	// ml-basic-string = ml-basic-string-delim [ newline ] ml-basic-body
-	// ml-basic-string-delim
-	// ml-basic-string-delim = 3quotation-mark
-	// ml-basic-body = *mlb-content *( mlb-quotes 1*mlb-content ) [ mlb-quotes ]
-	//
-	// mlb-content = mlb-char / newline / mlb-escaped-nl
-	// mlb-char = mlb-unescaped / escaped
-	// mlb-quotes = 1*2quotation-mark
-	// mlb-unescaped = wschar / %x21 / %x23-5B / %x5D-7E / non-ascii
-	// mlb-escaped-nl = escape ws newline *( wschar / newline )
-
-	escaped := false
-	i := 3
-
-	for ; i < len(b); i++ {
-		switch b[i] {
-		case '"':
-			if scanFollowsMultilineBasicStringDelimiter(b[i:]) {
-				i += 3
-
-				// At that point we found 3 apostrophe, and i is the
-				// index of the byte after the third one. The scanner
-				// needs to be eager, because there can be an extra 2
-				// apostrophe that can be accepted at the end of the
-				// string.
-
-				if i >= len(b) || b[i] != '"' {
-					return b[:i], escaped, b[i:], nil
-				}
-				i++
-
-				if i >= len(b) || b[i] != '"' {
-					return b[:i], escaped, b[i:], nil
-				}
-				i++
-
-				if i < len(b) && b[i] == '"' {
-					return nil, escaped, nil, newDecodeError(b[i-3:i+1], `""" not allowed in multiline basic string`)
-				}
-
-				return b[:i], escaped, b[i:], nil
-			}
-		case '\\':
-			if len(b) < i+2 {
-				return nil, escaped, nil, newDecodeError(b[len(b):], "need a character after \\")
-			}
-			escaped = true
-			i++ // skip the next character
-		case '\r':
-			if len(b) < i+2 {
-				return nil, escaped, nil, newDecodeError(b[len(b):], `need a \n after \r`)
-			}
-			if b[i+1] != '\n' {
-				return nil, escaped, nil, newDecodeError(b[i:i+2], `need a \n after \r`)
-			}
-			i++ // skip the \n
-		}
-	}
-
-	return nil, escaped, nil, newDecodeError(b[len(b):], `multiline basic string not terminated by """`)
-}