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1 files changed, 41 insertions, 0 deletions

diff --git a/node_modules/yaml/dist/parse/line-counter.js b/node_modules/yaml/dist/parse/line-counter.js
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+++ b/node_modules/yaml/dist/parse/line-counter.js
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+'use strict';
+
+/**
+ * Tracks newlines during parsing in order to provide an efficient API for
+ * determining the one-indexed `{ line, col }` position for any offset
+ * within the input.
+ */
+class LineCounter {
+    constructor() {
+        this.lineStarts = [];
+        /**
+         * Should be called in ascending order. Otherwise, call
+         * `lineCounter.lineStarts.sort()` before calling `linePos()`.
+         */
+        this.addNewLine = (offset) => this.lineStarts.push(offset);
+        /**
+         * Performs a binary search and returns the 1-indexed { line, col }
+         * position of `offset`. If `line === 0`, `addNewLine` has never been
+         * called or `offset` is before the first known newline.
+         */
+        this.linePos = (offset) => {
+            let low = 0;
+            let high = this.lineStarts.length;
+            while (low < high) {
+                const mid = (low + high) >> 1; // Math.floor((low + high) / 2)
+                if (this.lineStarts[mid] < offset)
+                    low = mid + 1;
+                else
+                    high = mid;
+            }
+            if (this.lineStarts[low] === offset)
+                return { line: low + 1, col: 1 };
+            if (low === 0)
+                return { line: 0, col: offset };
+            const start = this.lineStarts[low - 1];
+            return { line: low, col: offset - start + 1 };
+        };
+    }
+}
+
+exports.LineCounter = LineCounter;