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author | Wim <wim@42.be> | 2022-04-25 23:50:10 +0200 |
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committer | GitHub <noreply@github.com> | 2022-04-25 23:50:10 +0200 |
commit | 67adad3e08fe17d5f7e87468ea47aa76e1662255 (patch) | |
tree | 91314fac90d39254e66ae794decfcd21c10a7b20 /vendor/github.com/pelletier/go-toml/v2/scanner.go | |
parent | 2fca3c756373577eab4e0120ccce62eecc1f5ad8 (diff) | |
download | matterbridge-msglm-67adad3e08fe17d5f7e87468ea47aa76e1662255.tar.gz matterbridge-msglm-67adad3e08fe17d5f7e87468ea47aa76e1662255.tar.bz2 matterbridge-msglm-67adad3e08fe17d5f7e87468ea47aa76e1662255.zip |
Update dependencies (#1813)
Diffstat (limited to 'vendor/github.com/pelletier/go-toml/v2/scanner.go')
-rw-r--r-- | vendor/github.com/pelletier/go-toml/v2/scanner.go | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/vendor/github.com/pelletier/go-toml/v2/scanner.go b/vendor/github.com/pelletier/go-toml/v2/scanner.go new file mode 100644 index 00000000..bb445fab --- /dev/null +++ b/vendor/github.com/pelletier/go-toml/v2/scanner.go @@ -0,0 +1,269 @@ +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 """`) +} |