- std::stringstream os;
- std::copy(base64_encode(val), base64_encode(val + len),
- std::ostream_iterator<char>(os));
- return os.str();
+ std::string ret;
+ int i = 0;
+ int j = 0;
+ unsigned char char_array_3[3];
+ unsigned char char_array_4[4];
+
+ while (len--) {
+ char_array_3[i++] = *(val++);
+ if (i == 3) {
+ char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
+ char_array_4[1] = ((char_array_3[0] & 0x03) << 4) +
+ ((char_array_3[1] & 0xf0) >> 4);
+ char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) +
+ ((char_array_3[2] & 0xc0) >> 6);
+ char_array_4[3] = char_array_3[2] & 0x3f;
+
+ for(i = 0; (i <4) ; i++)
+ ret += kBase64Chars[char_array_4[i]];
+ i = 0;
+ }
+ }
+
+ if (i) {
+ for(j = i; j < 3; j++)
+ char_array_3[j] = '\0';
+
+ char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
+ char_array_4[1] = ((char_array_3[0] & 0x03) << 4) +
+ ((char_array_3[1] & 0xf0) >> 4);
+ char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) +
+ ((char_array_3[2] & 0xc0) >> 6);
+ char_array_4[3] = char_array_3[2] & 0x3f;
+
+ for (j = 0; (j < i + 1); j++)
+ ret += kBase64Chars[char_array_4[j]];
+
+ while((i++ < 3))
+ ret += '=';
+ }
+
+ return ret;