memcpy a pass by value variable in enc_text_decrypt(enc_text.cpp)

[ScottLiao920]

in line 410-411 of enc_text.cpp, it means to update dst_len with the actual length of decrypted string, but as dst_len is passed by value, this update will not affect dst_len on the caller side.
Is it designed to perform as this?

[55199789]

The exact value of dst_len will not be updated (on the caller side), but it updates pDst[dst_len] = '\0'; (line 421), then the caller can determine the actual length.