Mf>dZddlmZmZddlmZd dZd dZd dZd S) ui From BIFF8 on, strings are always stored using UTF-16LE text encoding. The character array is a sequence of 16-bit values4. Additionally it is possible to use a compressed format, which omits the high bytes of all characters, if they are all zero. The following tables describe the standard format of the entire string, but in many records the strings differ from this format. This will be mentioned separately. It is possible (but not required) to store Rich-Text formatting information and Asian phonetic information inside a Unicode string. This results in four different ways to store a string. The character array is not zero-terminated. The string consists of the character count (as usual an 8-bit value or a 16-bit value), option flags, the character array and optional formatting information. If the string is empty, sometimes the option flags field will not occur. This is mentioned at the respective place. Offset Size Contents 0 1 or 2 Length of the string (character count, ln) 1 or 2 1 Option flags: Bit Mask Contents 0 01H Character compression (ccompr): 0 = Compressed (8-bit characters) 1 = Uncompressed (16-bit characters) 2 04H Asian phonetic settings (phonetic): 0 = Does not contain Asian phonetic settings 1 = Contains Asian phonetic settings 3 08H Rich-Text settings (richtext): 0 = Does not contain Rich-Text settings 1 = Contains Rich-Text settings [2 or 3] 2 (optional, only if richtext=1) Number of Rich-Text formatting runs (rt) [var.] 4 (optional, only if phonetic=1) Size of Asian phonetic settings block (in bytes, sz) var. ln or 2·ln Character array (8-bit characters or 16-bit characters, dependent on ccompr) [var.] 4·rt (optional, only if richtext=1) List of rt formatting runs [var.] sz (optional, only if phonetic=1) Asian Phonetic Settings Block )unicode unicode_type)packasciicjt|tr|}nt||}t|}|dkrt d |d}d}|}n9#t $r,|d}d}t|dz}YnwxYwtd|||zS) N#String longer than 32767 characterslatin1r utf_16_lerz>> !yy"" !!!yy%%d))q.! w % % ,,A((3BBc,d}d}d}|D]m\}}t|tst||}||z }||td||z }|t |ddzz }nt |dz}|dkrt d  |d }d } t |} n9#t$r,|d}d } t |dz} YnwxYwtd | | ||z|fS)Nrz>> !yy""d)) !!!yy%%d))q.! v . . 5r 99s&C3C<;C<cjt|tr|}nt||}t|}|dkrt d |d}d}|}n9#t $r,|d}d}t|dz}YnwxYwtd|||zS) Nz!String longer than 255 charactersr rr rr zr2s%%N*)))))))----8::::@------r!