CRTL, iconv, Return Values
*Conan The Librarian
x Number of non-identical conversions performed. Indicates successful conversion. In most cases 0 is returned. (size_t) -1 Indicates an error condition. The function sets errno to one of the following: o EBADF - The cd argument is not a valid conversion descriptor. o EILSEQ - The conversion stops when an invalid character detected. o E2BIG - The conversion stops because of insufficient space in the output buffer. o EINVAL - The conversion stops because of an incomplete character at the end of the input buffer.