diff options
Diffstat (limited to 'lib.go')
| -rw-r--r-- | lib.go | 46 |
1 files changed, 42 insertions, 4 deletions
@@ -456,6 +456,11 @@ func isNumeric(s string) (bool, int) { return true, p } +var ( + bstrExp = regexp.MustCompile(`_x[a-zA-Z\d]{4}_`) + bstrEscapeExp = regexp.MustCompile(`x[a-zA-Z\d]{4}_`) +) + // bstrUnmarshal parses the binary basic string, this will trim escaped string // literal which not permitted in an XML 1.0 document. The basic string // variant type can store any valid Unicode character. Unicode characters @@ -468,15 +473,13 @@ func isNumeric(s string) (bool, int) { // initial underscore shall itself be escaped (i.e. stored as _x005F_). For // example: The string literal _x0008_ would be stored as _x005F_x0008_. func bstrUnmarshal(s string) (result string) { - bstrExp := regexp.MustCompile(`_x[a-zA-Z0-9]{4}_`) - escapeExp := regexp.MustCompile(`x[a-zA-Z0-9]{4}_`) matches, l, cursor := bstrExp.FindAllStringSubmatchIndex(s, -1), len(s), 0 for _, match := range matches { result += s[cursor:match[0]] subStr := s[match[0]:match[1]] if subStr == "_x005F_" { cursor = match[1] - if l > match[1]+6 && !escapeExp.MatchString(s[match[1]:match[1]+6]) { + if l > match[1]+6 && !bstrEscapeExp.MatchString(s[match[1]:match[1]+6]) { result += subStr continue } @@ -487,7 +490,7 @@ func bstrUnmarshal(s string) (result string) { cursor = match[1] v, err := strconv.Unquote(`"\u` + s[match[0]+2:match[1]-1] + `"`) if err != nil { - if l > match[1]+6 && escapeExp.MatchString(s[match[1]:match[1]+6]) { + if l > match[1]+6 && bstrEscapeExp.MatchString(s[match[1]:match[1]+6]) { result += subStr[:6] cursor = match[1] + 6 continue @@ -512,6 +515,41 @@ func bstrUnmarshal(s string) (result string) { return result } +// bstrMarshal encode the escaped string literal which not permitted in an XML +// 1.0 document. +func bstrMarshal(s string) (result string) { + matches, l, cursor := bstrExp.FindAllStringSubmatchIndex(s, -1), len(s), 0 + for _, match := range matches { + result += s[cursor:match[0]] + subStr := s[match[0]:match[1]] + if subStr == "_x005F_" { + cursor = match[1] + if match[1]+6 <= l && bstrEscapeExp.MatchString(s[match[1]:match[1]+6]) { + _, err := strconv.Unquote(`"\u` + s[match[1]+1:match[1]+5] + `"`) + if err == nil { + result += subStr + "x005F" + subStr + continue + } + } + result += subStr + "x005F_" + continue + } + if bstrExp.MatchString(subStr) { + cursor = match[1] + _, err := strconv.Unquote(`"\u` + s[match[0]+2:match[1]-1] + `"`) + if err == nil { + result += "_x005F" + subStr + continue + } + result += subStr + } + } + if cursor < l { + result += s[cursor:] + } + return result +} + // Stack defined an abstract data type that serves as a collection of elements. type Stack struct { list *list.List |