Function escapestring

source/src/protocol.cpp:434–461

// counterpart of filterrichtext

const char *escapestring(const char *s, bool force, bool noquotes, vector<char> *buf)
{
    static vector<char> strbuf[3];
    static int stridx = 0;
    extern bool isdedicated;
    if(noquotes) force = false;
    if(!s) return force ? "\"\"" : "";
    if(!force && !*(s + strcspn(s, "\"/\\;()[] \f\t\a\n\r$"))) return s;
    if(!buf) buf = &strbuf[stridx++];
    stridx %= 3;
    buf->setsize(0);
    if(!noquotes) buf->add('"');
    for(; *s; s++) switch(*s)
    {
        case '\n': buf->put("\\n", 2); break;
        case '\r': buf->put("\\n", 2); break;
        case '\t': buf->put("\\t", 2); break;
        case '\a': buf->put("\\a", 2); break;
        case '\f': buf->put("\\f", 2); break;
        case '"': buf->put("\\\"", 2); break;
        case '\\': buf->put("\\\\", 2); break;
        case ' ': if(isdedicated) { buf->put("\\_", 2); break; }
        default: buf->add(*s); break;
    }
    if(!noquotes) buf->add('"');
    buf->add(0);
    return buf->getbuf();
}

// ensures, that d is either two lowercase chars or ""