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Files ctype-utf8.c and ctype-ucs2.c have very similar pieces of the code:
static inline void
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my_tosort_utf16(MY_UNICASE_INFO *uni_plane, my_wc_t *wc)
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{
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if (*wc <= uni_plane->maxchar)
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{
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MY_UNICASE_CHARACTER *page;
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if ((page= uni_plane->page[*wc >> 8]))
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*wc= page[*wc & 0xFF].sort;
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}
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else
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{
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*wc= MY_CS_REPLACEMENT_CHARACTER;
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}
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}
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static inline void
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my_tosort_utf32(MY_UNICASE_INFO *uni_plane, my_wc_t *wc)
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{
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if (*wc <= uni_plane->maxchar)
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{
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MY_UNICASE_CHARACTER *page;
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if ((page= uni_plane->page[*wc >> 8]))
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*wc= page[*wc & 0xFF].sort;
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}
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else
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{
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*wc= MY_CS_REPLACEMENT_CHARACTER;
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}
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}
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static inline void
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my_tosort_ucs2(MY_UNICASE_INFO *uni_plane, my_wc_t *wc)
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{
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MY_UNICASE_CHARACTER *page;
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if ((page= uni_plane->page[(*wc >> 8) & 0xFF]))
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*wc= page[*wc & 0xFF].sort;
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}
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static inline void
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my_tosort_unicode(MY_UNICASE_INFO *uni_plane, my_wc_t *wc, uint flags)
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{
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if (*wc <= uni_plane->maxchar)
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{
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MY_UNICASE_CHARACTER *page;
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if ((page= uni_plane->page[*wc >> 8]))
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*wc= (flags & MY_CS_LOWER_SORT) ?
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page[*wc & 0xFF].tolower :
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page[*wc & 0xFF].sort;
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}
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else
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{
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*wc= MY_CS_REPLACEMENT_CHARACTER;
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}
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}
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In order to simplify the patch for MDEV-30577 lets move the repeatable code to a shared file ctype-unidata.h:
static inline void my_tosort_unicode_bmp(const MY_UNICASE_INFO *uni_plane,
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my_wc_t *wc)
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{
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const MY_UNICASE_CHARACTER *page;
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DBUG_ASSERT(*wc <= uni_plane->maxchar);
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if ((page= uni_plane->page[*wc >> 8]))
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*wc= page[*wc & 0xFF].sort;
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}
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static inline void my_tosort_unicode(const MY_UNICASE_INFO *uni_plane,
my_wc_t *wc)
{
if (*wc <= uni_plane->maxchar)
{
const MY_UNICASE_CHARACTER *page;
if ((page= uni_plane->page[*wc >> 8]))
*wc= page[*wc & 0xFF].sort;
}
else
{
*wc= MY_CS_REPLACEMENT_CHARACTER;
}
}
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