diff options
author | Ulrich Drepper <drepper@redhat.com> | 2000-07-25 04:37:22 +0000 |
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committer | Ulrich Drepper <drepper@redhat.com> | 2000-07-25 04:37:22 +0000 |
commit | ef4461440540e0ad4e25ba35203594e25dc38b3a (patch) | |
tree | 6b454c8f044abd370ab99f5e7f05f34b98d13fb6 /wctype/wchar-lookup.h | |
parent | f79d99cb260028d1eae399c99f8cee645a32538f (diff) |
Update.
2000-07-23 Bruno Haible <haible@clisp.cons.org>
* wctype/wchar-lookup.h: New file.
* wctype/iswctype.c: Include "wchar-lookup.h".
(__iswctype): Support alternate locale format with 3-level tables.
* wctype/iswctype_l.c (__iswctype_l): Likewise.
* wctype/towctrans.c (__towctrans): Likewise.
* wctype/towctrans_l.c (__towctrans_l): Likewise.
* wctype/wcfuncs.c: Include "wchar-lookup.h".
(__ctype32_wctype, __ctype32_wctrans): Declare external.
(__iswalnum, __iswalpha, __iswcntrl, __iswdigit, __iswlower,
__iswgraph, __iswprint, __iswpunct, __iswspace, __iswupper,
__iswxdigit, towlower, towupper): Support alternate locale format
with 3-level tables.
* wctype/wcextra.c (iswblank): Likewise.
* wctype/wcfuncs_l.c: Include "wchar-lookup.h".
(__iswalnum_l, __iswalpha_l, __iswcntrl_l, __iswdigit_l, __iswlower_l,
__iswgraph_l, __iswprint_l, __iswpunct_l, __iswspace_l, __iswupper_l,
__iswxdigit_l, __towlower_l, __towupper_l): Support alternate locale
format with 3-level tables.
* wctype/wcextra_l.c (__iswblank_l): Likewise.
* wctype/wctype.c (__wctype): Likewise. In the alternate locale
format, return a 3-level table pointer.
* wctype/wctype_l.c (__wctype_l): Likewise.
* wctype/wctrans.c (wctrans): Likewise.
* wctype/wctype.h (__ISwupper, __ISwlower, __ISwalpha, __ISwdigit,
__ISwxdigit, __ISwspace, __ISwprint, __ISwgraph, __ISwblank,
__ISwcntrl, __ISwpunct, __ISwalnum): New enum values.
(iswctype): Remove macro definition.
* wcsmbs/wcwidth.h: Include "wchar-lookup.h".
(internal_wcwidth): Support alternate locale format with 3-level
tables.
* locale/langinfo.h (_NL_CTYPE_CLASS_OFFSET, _NL_CTYPE_MAP_OFFSET):
New nl_items.
* locale/categories.def (_NL_CTYPE_CLASS_OFFSET, _NL_CTYPE_MAP_OFFSET):
Define them as being type "word".
* locale/C-ctype.c (_nl_C_LC_CTYPE): Add initializers for them.
* ctype/ctype-info.c (__ctype32_wctype, __ctype32_wctrans,
__ctype32_width): New exported variables.
* locale/lc-ctype.c (_nl_postload_ctype): Initialize them in the
alternate locale format. Don't initialize __ctype_names and
__ctype_width in the alternate locale format.
* locale/programs/localedef.h (oldstyle_tables): New declaration.
* locale/programs/localedef.c (oldstyle_tables): New variable.
(OPT_OLDSTYLE): New macro.
(options): Add --old-style option.
(parse_opt): Handle --old-style option.
* locale/programs/ld-ctype.c (locale_ctype_t): Add class_offset,
map_offset, class_3level, map_3level, width_3level members.
(ctype_output): Support for alternate locale format: Computation of
nelems changes. _NL_CTYPE_TOUPPER32, _NL_CTYPE_TOLOWER32 and
_NL_CTYPE_CLASS32 only 256 characters. _NL_CTYPE_NAMES empty.
New fields _NL_CTYPE_CLASS_OFFSET, _NL_CTYPE_MAP_OFFSET. Field
_NL_CTYPE_WIDTH now contains the three-level table. Extra elems
now contain both class and map tables.
(struct wctype_table): New type.
(wctype_table_init, wctype_table_add, wctype_table_finalize): New
functions.
(struct wcwidth_table): New type.
(wcwidth_table_init, wcwidth_table_add, wcwidth_table_finalize): New
functions.
(struct wctrans_table): New type.
(wctrans_table_init, wctrans_table_add, wctrans_table_finalize): New
functions.
(allocate_arrays): Support for alternate locale format: Set
plane_size and plane_cnt to 0. Restrict ctype->ctype32_b to the first
256 characters. Compute ctype->class_3level. Restrict ctype->map32[idx]
to the first 256 characters. Compute ctype->map_3level. Set
ctype->class_offset and ctype->map_offset. Compute ctype->width_3level
instead of ctype->width.
Diffstat (limited to 'wctype/wchar-lookup.h')
-rw-r--r-- | wctype/wchar-lookup.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/wctype/wchar-lookup.h b/wctype/wchar-lookup.h new file mode 100644 index 0000000000..1d08492035 --- /dev/null +++ b/wctype/wchar-lookup.h @@ -0,0 +1,139 @@ +/* Copyright (C) 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Bruno Haible <haible@clisp.cons.org>, 2000. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +/* Tables indexed by a wide character are compressed through the use + of a multi-level lookup. The compression effect comes from blocks + that don't need particular data and from block that can share their + data. */ + +/* Bit tables are accessed by cutting wc in four blocks of bits: + - the high 32-q-p bits, + - the next q bits, + - the next p bits, + - the next 5 bits. + + +------------------+-----+-----+-----+ + wc = + 32-q-p-5 | q | p | 5 | + +------------------+-----+-----+-----+ + + p and q are variable. For 16-bit Unicode it is sufficient to + choose p and q such that q+p+5 <= 16. + + The table contains the following uint32_t words: + - q+p+5, + - s = upper exclusive bound for wc >> (q+p+5), + - p+5, + - 2^q-1, + - 2^p-1, + - 1st-level table: s offsets, pointing into the 2nd-level table, + - 2nd-level table: k*2^q offsets, pointing into the 3rd-level table, + - 3rd-level table: j*2^p words, each containing 32 bits of data. +*/ + +static __inline int +wctype_table_lookup (const char *table, uint32_t wc) +{ + uint32_t shift1 = ((const uint32_t *) table)[0]; + uint32_t index1 = wc >> shift1; + uint32_t bound = ((const uint32_t *) table)[1]; + if (index1 < bound) + { + uint32_t lookup1 = ((const uint32_t *) table)[5 + index1]; + if (lookup1 != 0) + { + uint32_t shift2 = ((const uint32_t *) table)[2]; + uint32_t mask2 = ((const uint32_t *) table)[3]; + uint32_t index2 = (wc >> shift2) & mask2; + uint32_t lookup2 = ((const uint32_t *)(table + lookup1))[index2]; + if (lookup2 != 0) + { + uint32_t mask3 = ((const uint32_t *) table)[4]; + uint32_t index3 = (wc >> 5) & mask3; + uint32_t lookup3 = ((const uint32_t *)(table + lookup2))[index3]; + + return (lookup3 >> (wc & 0x1f)) & 1; + } + } + } + return 0; +} + +/* Byte tables are similar to bit tables, except that the addressing + unit is a single byte, and no 5 bits are used as a word index. */ + +static __inline int +wcwidth_table_lookup (const char *table, uint32_t wc) +{ + uint32_t shift1 = ((const uint32_t *) table)[0]; + uint32_t index1 = wc >> shift1; + uint32_t bound = ((const uint32_t *) table)[1]; + if (index1 < bound) + { + uint32_t lookup1 = ((const uint32_t *) table)[5 + index1]; + if (lookup1 != 0) + { + uint32_t shift2 = ((const uint32_t *) table)[2]; + uint32_t mask2 = ((const uint32_t *) table)[3]; + uint32_t index2 = (wc >> shift2) & mask2; + uint32_t lookup2 = ((const uint32_t *)(table + lookup1))[index2]; + if (lookup2 != 0) + { + uint32_t mask3 = ((const uint32_t *) table)[4]; + uint32_t index3 = wc & mask3; + uint8_t lookup3 = ((const uint8_t *)(table + lookup2))[index3]; + + return lookup3; + } + } + } + return 0xff; +} + +/* Mapping tables are similar to bit tables, except that the + addressing unit is a single signed 32-bit word, containing the + difference between the desired result and the argument, and no 5 + bits are used as a word index. */ + +static __inline uint32_t +wctrans_table_lookup (const char *table, uint32_t wc) +{ + uint32_t shift1 = ((const uint32_t *) table)[0]; + uint32_t index1 = wc >> shift1; + uint32_t bound = ((const uint32_t *) table)[1]; + if (index1 < bound) + { + uint32_t lookup1 = ((const uint32_t *) table)[5 + index1]; + if (lookup1 != 0) + { + uint32_t shift2 = ((const uint32_t *) table)[2]; + uint32_t mask2 = ((const uint32_t *) table)[3]; + uint32_t index2 = (wc >> shift2) & mask2; + uint32_t lookup2 = ((const uint32_t *)(table + lookup1))[index2]; + if (lookup2 != 0) + { + uint32_t mask3 = ((const uint32_t *) table)[4]; + uint32_t index3 = wc & mask3; + int32_t lookup3 = ((const int32_t *)(table + lookup2))[index3]; + + return wc + lookup3; + } + } + } + return wc; +} |