@eagleoutice/flowr/util/range.js

Static Dataflow Analyzer and Program Slicer for the R Programming Language

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.getRangeStart = getRangeStart;
exports.getRangeEnd = getRangeEnd;
exports.rangeFrom = rangeFrom;
exports.mergeRanges = mergeRanges;
exports.rangeStartsCompletelyBefore = rangeStartsCompletelyBefore;
exports.rangesOverlap = rangesOverlap;
exports.addRanges = addRanges;
exports.rangeCompare = rangeCompare;
const assert_1 = require("./assert");
function getRangeStart(p) {
    return p === undefined ? undefined : [p[0], p[1]];
}
function getRangeEnd(p) {
    return p === undefined ? undefined : [p[2], p[3]];
}
/**
 * This does not ensure ordering of start and end!
 *
 * @param sl - start line
 * @param sc - start column
 * @param el - end line
 * @param ec - end column
 */
function rangeFrom(sl, sc, el, ec) {
    return [Number(sl), Number(sc), Number(el), Number(ec)];
}
function mergeRanges(...rs) {
    (0, assert_1.guard)(rs.length > 0, 'Cannot merge no ranges');
    return rs.reduce(([sl, sc, el, ec], [nsl, nsc, nel, nec]) => [
        ...(sl < nsl || (sl === nsl && sc < nsc) ? [sl, sc] : [nsl, nsc]),
        ...(el > nel || (el === nel && ec > nec) ? [el, ec] : [nel, nec])
    ], rs[0]);
}
/**
 * @returns true iff `r1` starts and ends before `r2` starts (i.e., if `r1` and `r2` do not overlap and `r1` comes before `r2`
 */
function rangeStartsCompletelyBefore([, , r1el, r1ec], [r2sl, r2sc, ,]) {
    return r1el < r2sl || (r1el === r2sl && r1ec < r2sc);
}
/**
 * Checks if the two ranges overlap.
 */
function rangesOverlap([r1sl, r1sc, r1el, r1ec], [r2sl, r2sc, r2el, r2ec]) {
    return r1sl <= r2el && r2sl <= r1el && r1sc <= r2ec && r2sc <= r1ec;
}
/**
 * Calculate the component-wise sum of two ranges
 */
function addRanges([r1sl, r1sc, r1el, r1ec], [r2sl, r2sc, r2el, r2ec]) {
    return [r1sl + r2sl, r1sc + r2sc, r1el + r2el, r1ec + r2ec];
}
/**
 * Provides a comparator for {@link SourceRange}s that sorts them in ascending order.
 *
 * @returns a positive number if `r1` comes after `r2`, a negative number if `r1` comes before `r2`, and `0` if they are equal
 */
function rangeCompare([r1sl, r1sc, ,], [r2sl, r2sc, ,]) {
    if (r1sl === r2sl) {
        return r1sc - r2sc;
    }
    else {
        return r1sl - r2sl;
    }
}
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