const lineSplitRE = /\r?\n/;
function positionToOffset(source, lineNumber, columnNumber) {
const lines = source.split(lineSplitRE);
const nl = /\r\n/.test(source) ? 2 : 1;
let start = 0;
if (lineNumber > lines.length) {
return source.length;
}
for (let i = 0; i < lineNumber - 1; i++) {
start += lines[i].length + nl;
}
return start + columnNumber;
}
function offsetToLineNumber(source, offset) {
if (offset > source.length) {
throw new Error(`offset is longer than source length! offset ${offset} > length ${source.length}`);
}
const lines = source.split(lineSplitRE);
const nl = /\r\n/.test(source) ? 2 : 1;
let counted = 0;
let line = 0;
for (; line < lines.length; line++) {
const lineLength = lines[line].length + nl;
if (counted + lineLength >= offset) {
break;
}
counted += lineLength;
}
return line + 1;
}
export { lineSplitRE, offsetToLineNumber, positionToOffset };
