+
+ os << "\"";
+ }
+
+ void escapeUnicodeString(const char *str) {
+ os << "\"";
+
+ const char *locale = setlocale(LC_CTYPE, "");
+ const char *src = str;
+ mbstate_t state;
+
+ memset(&state, 0, sizeof state);
+
+ do {
+ // Convert characters one at a time in order to recover from
+ // conversion errors
+ wchar_t c;
+ size_t written = mbsrtowcs(&c, &src, 1, &state);
+ if (written == 0) {
+ // completed
+ break;
+ } if (written == (size_t)-1) {
+ // conversion error -- skip
+ os << "?";
+ do {
+ ++src;
+ } while (*src & 0x80);
+ } else if ((c == '\"') ||
+ (c == '\\')) {
+ // escape character
+ os << '\\' << (unsigned char)c;
+ } else if ((c >= 0x20 && c <= 0x7e) ||
+ c == '\t' ||
+ c == '\r' ||
+ c == '\n') {
+ // pass-through character
+ os << (unsigned char)c;
+ } else {
+ // unicode
+ os << "\\u" << std::setfill('0') << std::hex << std::setw(4) << (unsigned)c;
+ os << std::dec;
+ }
+ } while (src);
+
+ setlocale(LC_CTYPE, locale);
+
+ os << "\"";
+ }
+
+ void encodeBase64String(const unsigned char *bytes, size_t size) {
+ const char *table64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+ unsigned char c0, c1, c2, c3;
+ char buf[4];
+ unsigned written;
+
+ os << "\"";
+
+ written = 0;
+ while (size >= 3) {
+ c0 = bytes[0] >> 2;
+ c1 = ((bytes[0] & 0x03) << 4) | ((bytes[1] & 0xf0) >> 4);
+ c2 = ((bytes[1] & 0x0f) << 2) | ((bytes[2] & 0xc0) >> 6);
+ c3 = bytes[2] & 0x3f;
+
+ buf[0] = table64[c0];
+ buf[1] = table64[c1];
+ buf[2] = table64[c2];
+ buf[3] = table64[c3];
+
+ os.write(buf, 4);
+
+ bytes += 3;
+ size -= 3;
+ ++written;
+
+ if (written >= 76/4 && size) {
+ os << "\n";
+ written = 0;
+ }
+ }
+
+ if (size > 0) {
+ c0 = bytes[0] >> 2;
+ c1 = ((bytes[0] & 0x03) << 4);
+ buf[2] = '=';
+ buf[3] = '=';
+
+ if (size > 1) {
+ c1 |= ((bytes[1] & 0xf0) >> 4);
+ c2 = ((bytes[1] & 0x0f) << 2);
+ if (size > 2) {
+ c2 |= ((bytes[2] & 0xc0) >> 6);
+ c3 = bytes[2] & 0x3f;
+ buf[3] = table64[c3];
+ }
+ buf[2] = table64[c2];
+ }
+ buf[1] = table64[c1];
+ buf[0] = table64[c0];
+
+ os.write(buf, 4);
+ }
+