const numberRegExp = /^(0|[1-9][0-9]*)$/;

const coreModuleRegExp = /^ {4}at (?:[^/\\(]+ \(|)node:(.+):\d+:\d+\)?$/;

const nodeModulesRegExp = /[/\\]node_modules[/\\](.+?)(?=[/\\])/g;

const classRegExp = /^(\s+[^(]*?)\s*{/;

// eslint-disable-next-line node-core/no-unescaped-regexp-dot

function markNodeModules(ctx, line) {

let tempLine = '';

let nodeModule;

let pos = 0;

while ((nodeModule = nodeModulesRegExp.exec(line)) !== null) {

// '/node_modules/'.length === 14

tempLine += StringPrototypeSlice(line, pos, nodeModule.index + 14);

tempLine += ctx.stylize(nodeModule[1], 'module');

pos = nodeModule.index + nodeModule[0].length;

}

if (pos !== 0) {

line = tempLine + StringPrototypeSlice(line, pos);

let lastPos = 0;

let searchFrom = 0;

while (true) {

const nodeModulePosition = StringPrototypeIndexOf(line, 'node_modules', searchFrom);

if (nodeModulePosition === -1) {

break;

}

// Ensure it's a path segment: must have a path separator before and after

const separator = line[nodeModulePosition - 1];

const after = line[nodeModulePosition + 12]; // 'node_modules'.length === 12

if ((after !== '/' && after !== '\\') || (separator !== '/' && separator !== '\\')) {

// Not a proper segment; continue searching

searchFrom = nodeModulePosition + 1;

continue;

}

const moduleStart = nodeModulePosition + 13; // Include trailing separator

// Append up to and including '/node_modules/'

tempLine += StringPrototypeSlice(line, lastPos, moduleStart);

let moduleEnd = StringPrototypeIndexOf(line, separator, moduleStart);

if (line[moduleStart] === '@') {

// Namespaced modules have an extra slash: @namespace/package

moduleEnd = StringPrototypeIndexOf(line, separator, moduleEnd + 1);

}

const nodeModule = StringPrototypeSlice(line, moduleStart, moduleEnd);

tempLine += ctx.stylize(nodeModule, 'module');

lastPos = moduleEnd;

searchFrom = moduleEnd;

}

if (lastPos !== 0) {

line = tempLine + StringPrototypeSlice(line, lastPos);

}

return line;

}