Function Decode

Dependencies/assimp/code/Common/Base64.cpp:122–170

}

size_t Decode(const char *in, size_t inLength, uint8_t *&out) {
    if (in == nullptr) {
        out = nullptr;
        return 0;
    }

    if (inLength % 4 != 0) {
        throw DeadlyImportError("Invalid base64 encoded data: \"", std::string(in, std::min(size_t(32), inLength)),
            "\", length:", inLength);
    }

    if (inLength < 4) {
        out = nullptr;
        return 0;
    }

    int nEquals = int(in[inLength - 1] == '=') +
                  int(in[inLength - 2] == '=');

    size_t outLength = (inLength * 3) / 4 - nEquals;
    out = new uint8_t[outLength];
    memset(out, 0, outLength);

    size_t i, j = 0;

    for (i = 0; i + 4 < inLength; i += 4) {
        uint8_t b0 = DecodeChar(in[i]);
        uint8_t b1 = DecodeChar(in[i + 1]);
        uint8_t b2 = DecodeChar(in[i + 2]);
        uint8_t b3 = DecodeChar(in[i + 3]);

        out[j++] = (uint8_t)((b0 << 2) | (b1 >> 4));
        out[j++] = (uint8_t)((b1 << 4) | (b2 >> 2));
        out[j++] = (uint8_t)((b2 << 6) | b3);
    }

    {
        uint8_t b0 = DecodeChar(in[i]);
        uint8_t b1 = DecodeChar(in[i + 1]);
        uint8_t b2 = DecodeChar(in[i + 2]);
        uint8_t b3 = DecodeChar(in[i + 3]);

        out[j++] = (uint8_t)((b0 << 2) | (b1 >> 4));
        if (b2 < 64) out[j++] = (uint8_t)((b1 << 4) | (b2 >> 2));
        if (b3 < 64) out[j++] = (uint8_t)((b2 << 6) | b3);
    }

    return outLength;
}

size_t Decode(const std::string &in, std::vector<uint8_t> &out) {
    uint8_t *outPtr = nullptr;