diff options
Diffstat (limited to 'locale/coll-lookup.h')
| -rw-r--r-- | locale/coll-lookup.h | 83 |
1 files changed, 5 insertions, 78 deletions
diff --git a/locale/coll-lookup.h b/locale/coll-lookup.h index 6a396fa878..3fe6bafb71 100644 --- a/locale/coll-lookup.h +++ b/locale/coll-lookup.h @@ -1,4 +1,4 @@ -/* Copyright (C) 2000 Free Software Foundation, Inc. +/* Copyright (C) 2000, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Bruno Haible <haible@clisp.cons.org>, 2000. @@ -17,85 +17,12 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ -/* Word tables are accessed by cutting wc in three blocks of bits: - - the high 32-q-p bits, - - the next q bits, - - the next p bits. - - +------------------+-----+-----+ - wc = + 32-q-p | q | p | - +------------------+-----+-----+ - - p and q are variable. For 16-bit Unicode it is sufficient to - choose p and q such that q+p <= 16. - - The table contains the following uint32_t words: - - q+p, - - s = upper exclusive bound for wc >> (q+p), - - p, - - 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. -*/ - #include <stdint.h> /* Lookup in a table of int32_t, with default value 0. */ -static inline int32_t -collidx_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 lookup3; - } - } - } - return 0; -} +extern int32_t __collidx_table_lookup (const char *table, uint32_t wc) + internal_function; /* Lookup in a table of uint32_t, with default value 0xffffffff. */ -static inline uint32_t -collseq_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; - uint32_t lookup3 = ((const uint32_t *)(table + lookup2))[index3]; - - return lookup3; - } - } - } - return ~((uint32_t) 0); -} +extern uint32_t __collseq_table_lookup (const char *table, uint32_t wc) + internal_function; |