diff options
Diffstat (limited to 'vendor/github.com/tdewolff/parse/v2/common.go')
| -rw-r--r-- | vendor/github.com/tdewolff/parse/v2/common.go | 237 |
1 files changed, 0 insertions, 237 deletions
diff --git a/vendor/github.com/tdewolff/parse/v2/common.go b/vendor/github.com/tdewolff/parse/v2/common.go deleted file mode 100644 index da46cc3df..000000000 --- a/vendor/github.com/tdewolff/parse/v2/common.go +++ /dev/null @@ -1,237 +0,0 @@ -// Package parse contains a collection of parsers for various formats in its subpackages. -package parse - -import ( - "bytes" - "encoding/base64" - "errors" -) - -var ( - dataSchemeBytes = []byte("data:") - base64Bytes = []byte("base64") - textMimeBytes = []byte("text/plain") -) - -// ErrBadDataURI is returned by DataURI when the byte slice does not start with 'data:' or is too short. -var ErrBadDataURI = errors.New("not a data URI") - -// Number returns the number of bytes that parse as a number of the regex format (+|-)?([0-9]+(\.[0-9]+)?|\.[0-9]+)((e|E)(+|-)?[0-9]+)?. -func Number(b []byte) int { - if len(b) == 0 { - return 0 - } - i := 0 - if b[i] == '+' || b[i] == '-' { - i++ - if i >= len(b) { - return 0 - } - } - firstDigit := (b[i] >= '0' && b[i] <= '9') - if firstDigit { - i++ - for i < len(b) && b[i] >= '0' && b[i] <= '9' { - i++ - } - } - if i < len(b) && b[i] == '.' { - i++ - if i < len(b) && b[i] >= '0' && b[i] <= '9' { - i++ - for i < len(b) && b[i] >= '0' && b[i] <= '9' { - i++ - } - } else if firstDigit { - // . could belong to the next token - i-- - return i - } else { - return 0 - } - } else if !firstDigit { - return 0 - } - iOld := i - if i < len(b) && (b[i] == 'e' || b[i] == 'E') { - i++ - if i < len(b) && (b[i] == '+' || b[i] == '-') { - i++ - } - if i >= len(b) || b[i] < '0' || b[i] > '9' { - // e could belong to next token - return iOld - } - for i < len(b) && b[i] >= '0' && b[i] <= '9' { - i++ - } - } - return i -} - -// Dimension parses a byte-slice and returns the length of the number and its unit. -func Dimension(b []byte) (int, int) { - num := Number(b) - if num == 0 || num == len(b) { - return num, 0 - } else if b[num] == '%' { - return num, 1 - } else if b[num] >= 'a' && b[num] <= 'z' || b[num] >= 'A' && b[num] <= 'Z' { - i := num + 1 - for i < len(b) && (b[i] >= 'a' && b[i] <= 'z' || b[i] >= 'A' && b[i] <= 'Z') { - i++ - } - return num, i - num - } - return num, 0 -} - -// Mediatype parses a given mediatype and splits the mimetype from the parameters. -// It works similar to mime.ParseMediaType but is faster. -func Mediatype(b []byte) ([]byte, map[string]string) { - i := 0 - for i < len(b) && b[i] == ' ' { - i++ - } - b = b[i:] - n := len(b) - mimetype := b - var params map[string]string - for i := 3; i < n; i++ { // mimetype is at least three characters long - if b[i] == ';' || b[i] == ' ' { - mimetype = b[:i] - if b[i] == ' ' { - i++ // space - for i < n && b[i] == ' ' { - i++ - } - if n <= i || b[i] != ';' { - break - } - } - params = map[string]string{} - s := string(b) - PARAM: - i++ // semicolon - for i < n && s[i] == ' ' { - i++ - } - start := i - for i < n && s[i] != '=' && s[i] != ';' && s[i] != ' ' { - i++ - } - key := s[start:i] - for i < n && s[i] == ' ' { - i++ - } - if i < n && s[i] == '=' { - i++ - for i < n && s[i] == ' ' { - i++ - } - start = i - for i < n && s[i] != ';' && s[i] != ' ' { - i++ - } - } else { - start = i - } - params[key] = s[start:i] - for i < n && s[i] == ' ' { - i++ - } - if i < n && s[i] == ';' { - goto PARAM - } - break - } - } - return mimetype, params -} - -// DataURI parses the given data URI and returns the mediatype, data and ok. -func DataURI(dataURI []byte) ([]byte, []byte, error) { - if len(dataURI) > 5 && bytes.Equal(dataURI[:5], dataSchemeBytes) { - dataURI = dataURI[5:] - inBase64 := false - var mediatype []byte - i := 0 - for j := 0; j < len(dataURI); j++ { - c := dataURI[j] - if c == '=' || c == ';' || c == ',' { - if c != '=' && bytes.Equal(TrimWhitespace(dataURI[i:j]), base64Bytes) { - if len(mediatype) > 0 { - mediatype = mediatype[:len(mediatype)-1] - } - inBase64 = true - i = j - } else if c != ',' { - mediatype = append(append(mediatype, TrimWhitespace(dataURI[i:j])...), c) - i = j + 1 - } else { - mediatype = append(mediatype, TrimWhitespace(dataURI[i:j])...) - } - if c == ',' { - if len(mediatype) == 0 || mediatype[0] == ';' { - mediatype = textMimeBytes - } - data := dataURI[j+1:] - if inBase64 { - decoded := make([]byte, base64.StdEncoding.DecodedLen(len(data))) - n, err := base64.StdEncoding.Decode(decoded, data) - if err != nil { - return nil, nil, err - } - data = decoded[:n] - } else { - data = DecodeURL(data) - } - return mediatype, data, nil - } - } - } - } - return nil, nil, ErrBadDataURI -} - -// QuoteEntity parses the given byte slice and returns the quote that got matched (' or ") and its entity length. -// TODO: deprecated -func QuoteEntity(b []byte) (quote byte, n int) { - if len(b) < 5 || b[0] != '&' { - return 0, 0 - } - if b[1] == '#' { - if b[2] == 'x' { - i := 3 - for i < len(b) && b[i] == '0' { - i++ - } - if i+2 < len(b) && b[i] == '2' && b[i+2] == ';' { - if b[i+1] == '2' { - return '"', i + 3 // " - } else if b[i+1] == '7' { - return '\'', i + 3 // ' - } - } - } else { - i := 2 - for i < len(b) && b[i] == '0' { - i++ - } - if i+2 < len(b) && b[i] == '3' && b[i+2] == ';' { - if b[i+1] == '4' { - return '"', i + 3 // " - } else if b[i+1] == '9' { - return '\'', i + 3 // ' - } - } - } - } else if len(b) >= 6 && b[5] == ';' { - if bytes.Equal(b[1:5], []byte{'q', 'u', 'o', 't'}) { - return '"', 6 // " - } else if bytes.Equal(b[1:5], []byte{'a', 'p', 'o', 's'}) { - return '\'', 6 // ' - } - } - return 0, 0 -} |