Detect-It-Easy/db/Binary/source_text.c.1.sg

// Detect It Easy: detection rule file
// Author: Jason Hood <jadoxa@yahoo.com.au>

// https://en.wikipedia.org/wiki/C_(programming_language)
meta("source", "C/C++");

function detect() {
    var sText = Binary.getHeaderString();
    if (/^#ifndef (\w+).*\s+^#define \1/m.test(sText) ||
        /#\s*pragma (?:once|hdrstop)/.test(sText)) {
        sOptions = "header";
        bDetected = true;
    }
    if (/^(?:class\b|virtual\b|public:|private:|template\b)/m.test(sText)) {
        if (!(/\sdef\s/.test(sText))) // to avoid false positives on python
        {
            sName = "C++";
            bDetected = true;
        }
    } else {
        var aInclude = sText.match(/^#include ["<].*?[>"]/mg);
        if (aInclude) {
            bDetected = true;
            for (var i = 0; i < aInclude.length; i++) {
                if (aInclude[i].indexOf(".") < 0) {
                    sName = "C++";
                    break;
                }
            }
        } else if (/^#define/m.test(sText)) {
            bDetected = true;
        }
    }

    return result();
}