Python-ctype unicode processing and python copiled with UCS-2 or UCS-4? -

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i trying call c-interface python using ctype module. below prototype of c function 

void utf_to_wide_char( const char* source, unsigned short* buffer, int buffersize)

utf_to_wide_char : converts utf-* string ucs2 string

source (input) : contains null terminated utf-8 string

buffer (output) : pointer buffer hold converted text

buffersize : indicates size of buffer, system copy upto size including null.

following python function:

def to_ucs2(py_unicode_string):     len_str = len(py_unicode_string)     local_str = py_unicode_string.encode('utf-8')     src = c_wchar_p(local_str)     buff = create_unicode_buffer(len_str * 2 )     # shared_lib ctype loaded instance of shared library.     shared_lib.utf8_to_widechar(src, buff, sizeof(buff))     return buff.value

problem : above code snippet works fine in python compiled ucs-4 ( --enable-unicode=ucs4 option ) , behave unexpected python compiled ucs-2 ( --enable-unicode=ucs2 ). ( verified python unicode compilation option referring how find out if python compiled ucs-2 or ucs-4? )

unfortunately in production environment using python compiled ucs-2. please comment on following points.

  1. although sure issue unicode option, yet nail down happening under hoods. need in coming required justification.
  2. is possible overcome issue, without compiling python --enable-unicode=ucs4 option?

( quite new unicode encoding stuff. have basic know-how. )


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