431 size_t b64Decode(const char* encoded, const size_t len, char** decoded)  in b64Decode()  argument
445     if (!decoded || !encoded || len == 0) return 0;  in b64Decode()
454     while (*encoded && *(encoded + 1)) {  in b64Decode()
455         if (*encoded <= 0x20) {  in b64Decode()
456             ++encoded;  in b64Decode()
460         auto value1 = B64_INDEX[(size_t)encoded[0]];  in b64Decode()
461         auto value2 = B64_INDEX[(size_t)encoded[1]];  in b64Decode()
464         if (!encoded[2] || encoded[3] < 0 || encoded[2] == '=' || encoded[2] == '.') break;  in b64Decode()
465         auto value3 = B64_INDEX[(size_t)encoded[2]];  in b64Decode()
468         if (!encoded[3] || encoded[3] < 0 || encoded[3] == '=' || encoded[3] == '.') break;  in b64Decode()
469         auto value4 = B64_INDEX[(size_t)encoded[3]];  in b64Decode()
471         encoded += 4;  in b64Decode()