ifc-language-server/node_modules/ajv/lib/compile/ucs2length.js
Ryan Schultz 8afacf268a Implemented a working Language Server Protocol (LSP) for IFC files with:
- Hover provider showing entity information and type
- Go-to-definition (F12) for entity references
- Basic IFC file validation (ISO-10303-21 header check)
- Entity parsing with regex-based detection
- Proper CommonJS module system (avoiding ES module issues)

This replaces the broken baseline from ifc-developer-tools which had:
- Non-functional ES module configuration
- Circular dependency issues
- Parser crashes
- Non-working PositionVisitor

Built on Microsoft's LSP example template for a clean, maintainable foundation.

Next: Add hierarchical entity dependency tree in hover tooltip."
2025-12-07 10:20:07 -06:00

20 lines
558 B
JavaScript

'use strict';
// https://mathiasbynens.be/notes/javascript-encoding
// https://github.com/bestiejs/punycode.js - punycode.ucs2.decode
module.exports = function ucs2length(str) {
var length = 0
, len = str.length
, pos = 0
, value;
while (pos < len) {
length++;
value = str.charCodeAt(pos++);
if (value >= 0xD800 && value <= 0xDBFF && pos < len) {
// high surrogate, and there is a next character
value = str.charCodeAt(pos);
if ((value & 0xFC00) == 0xDC00) pos++; // low surrogate
}
}
return length;
};