@drorgl/xml-streamer
Version:
XML stream parser for parsing large files efficiently with less usage of memory.
81 lines • 2.52 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
const escapeXMLTable = {
"&": "&",
"<": "<",
">": ">",
'"': """,
"'": "'"
};
function escapeXMLReplace(match) {
return escapeXMLTable[match];
}
const unescapeXMLTable = {
"&": "&",
"<": "<",
">": ">",
""": '"',
"'": "'"
};
function unescapeXMLReplace(match) {
if (match[1] === "#") {
let num;
if (match[2] === "x") {
num = parseInt(match.slice(3), 16);
}
else {
num = parseInt(match.slice(2), 10);
}
// https://www.w3.org/TR/xml/#NT-Char defines legal XML characters:
// #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]
if (num === 0x9 || num === 0xA || num === 0xD ||
(num >= 0x20 && num <= 0xD7FF) ||
(num >= 0xE000 && num <= 0xFFFD) ||
(num >= 0x10000 && num <= 0x10FFFF)) {
return String.fromCodePoint(num);
}
throw new Error("Illegal XML character 0x" + num.toString(16));
}
if (unescapeXMLTable[match]) {
return unescapeXMLTable[match] || match;
}
throw new Error("Illegal XML entity " + match);
}
function escapeXML(s) {
return s.replace(/&|<|>|"|'/g, escapeXMLReplace);
}
exports.escapeXML = escapeXML;
function unescapeXML(s) {
let result = "";
let start = -1;
let end = -1;
let previous = 0;
start = s.indexOf("&", previous);
end = s.indexOf(";", start + 1);
while ((start !== -1) && (end !== -1)) {
result = result +
s.substring(previous, start) +
unescapeXMLReplace(s.substring(start, end + 1));
previous = end + 1;
start = s.indexOf("&", previous);
end = s.indexOf(";", start + 1);
}
// shortcut if loop never entered:
// return the original string without creating new objects
if (previous === 0) {
return s;
}
// push the remaining characters
result = result + s.substring(previous);
return result;
}
exports.unescapeXML = unescapeXML;
function escapeXMLText(s) {
return s.replace(/&|<|>/g, escapeXMLReplace);
}
exports.escapeXMLText = escapeXMLText;
function unescapeXMLText(s) {
return s.replace(/&(amp|#38|lt|#60|gt|#62);/g, unescapeXMLReplace);
}
exports.unescapeXMLText = unescapeXMLText;
//# sourceMappingURL=unescape.js.map