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authorRoland McGrath <roland@gnu.org>1996-03-28 08:30:38 +0000
committerRoland McGrath <roland@gnu.org>1996-03-28 08:30:38 +0000
commit19bc17a90548ee427035994bbc4b14395723ff1f (patch)
treee7a17eda196c2610ca4be26c9e7985815162eafb /locale/weight.h
parent53f770e0f9d405ea8d1888254c6f7ce431b04c6e (diff)
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Thu Mar 28 03:25:10 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>
* intl/Makefile (copysrc): Add missing > in sed cmd. Sat Mar 23 17:52:49 1996 Ulrich Drepper <drepper@gnu.ai.mit.edu> * Makeconfig: Rename Makefile variable nlsdir to i18ndir and change value to $(datadir)/i18n. `nls' is not an appropriate name. * Makefile (subdirs): Add new subdir wctype. * ctype/ctype-info.c: Add new global variable __ctype_names and initialize from _nl_C_LC_CTYPE. * ctype/ctype.h: In P1003.3b/D11 `alnum' is a separate character class. Use bit 11. [_ISbit]: Protect definition of bitmasks because they are also used in wctype.h. * libio/genops.c (_IO_sputbackc, _IO_sungetc): Clear EOF flag after successfully pushing back a character. Fundamental changes in locale implementation. Almost nothing from the old code is used anymore. * locale/charmap.c, locale/collate.c, locale/config.h, locale/ctypedump.c, locale/hash.h, locale/keyword.gperf, locale/keyword.h, locale/loadlocale.c, locale/locale-ctype.c, locale/locale.c locale/localeconv.c, locale/localedef.c, locale/localedef.h, locale/locfile-hash.c, locale/locfile-lex.c, locale/locfile-parse.c, locale/messages.c, locale/monetary.c, locale/numeric.c, locale/setlocale.c, locale/token.h, locale/xmalloc.c: Removed. * locale/Makefile: Update for new locale implementation with program source code distributed in subdir. * locale/categories.def, locale/iso-4217.def: Updated file for new locale implementation. * locale/langinfo.h: Updated for new locale implementation. (ERA_D_T_FMT, ERA_T_FMT): New official values according to P1003.2b/D11. (_NL_COLLATE_NRULES, _NL_COLLATE_RULES, _NL_COLLATE_HASH_SIZE, _NL_COLLATE_HASH_LAYERS, _NL_COLLATE_TABLE_EB, _NL_COLLATE_TABLE_EL, _NL_COLLATE_UNDEFINED, _NL_COLLATE_EXTRA_EB, _NL_COLLATE_EXTRA_EL, _NL_CTYPE_NAMES_EB, _NL_CTYPE_NAMES_EL, _NL_CTYPE_HASH_SIZE, _NL_CTYPE_HASH_LAYERS, _NL_CTYPE_CLASS_NAMES, _NL_CTYPE_MAP_NAMES, _NL_CTYPE_WIDTH): New internal values for extended LC_CTYPE and LC_COLLATE implementation. * locale/simple-hash.c, locale/simple-hash.h, locale/xmalloc.c, locale/xstrdup.c: Helper functions for locale related programs. * locale/C-collate.c, locale/C-ctype.c, locale/C-messages.c, locale/C-monetary.c, locale/C-numeric.c, locale/C-time.c, locale/lc-collate.c, locale/lc-ctype.c, locale/lc-messages.c, locale/lc-monetary.c, locale/lc-numeric.c, locale/lc-time.c: New implementation of locale functions, and new generated "C" locale data. * locale/loadlocale.c: Now handles word fields in locale binary automatically by changing the endianess if necessary. * locale/localeinfo.h (LIMAGIC): Changed magic number because of incompatible changes. (locale_data): Changed definition to allow word as a value type. (coll_sort_rule): Values for collation sorting mode. (_NL_CURRENT_WORD): New macro to access word value of locale entry. (__collate_table, __collate_extra): Declare new global variables for collation tables. * locale/programs/charmap-kw.gperf, locale/programs/charmap-kw.h, locale/programs/charmap.c, locale/programs/charset.c, locale/programs/charset.h, locale/programs/config.h, locale/programs/ctypedump.c, locale/programs/ld-collate.c, locale/programs/ld-ctype.c, locale/programs/ld-messages.c, locale/programs/ld-monetary.c, locale/programs/ld-numeric.c, locale/programs/ld-time.c, locale/programs/linereader.c, locale/programs/linereader.h, locale/programs/locale.c, locale/programs/localedef.c, locale/programs/locales.h, locale/programs/locfile-kw.gperf, locale/programs/locfile-kw.h, locale/programs/locfile-token.h, locale/programs/locfile.c, locale/programs/locfile.h, locale/programs/stringtrans.c, locale/programs/stringtrans.h: Implementation of locale related programs. * locale/weight.h: Functions to access collation tables. * posix/unistd.h: Define _POSIX2_LOCALEDEF. * stdio-common/printf_fp.c: Fix bug with printing certain numbers < 10^-1. Reported by Bill Metzenthen. * stdio-common/tfformat.c: Add new test for above bug. * string/strcoll.c, string/strxfrm.c: Real implementation of string collation according to ISO C. * wctype/Makefile, wctype/cname-lookup.h, wctype/iswctype.c, wctype/test_wctype.c, wctype/towctrans.c, wctype/wcfuncs.c, wctype/wctrans.c, wctype/wctype.c, wctype/wctype.h: New files. Implementation of wide character classes and mapping.
Diffstat (limited to 'locale/weight.h')
-rw-r--r--locale/weight.h171
1 files changed, 171 insertions, 0 deletions
diff --git a/locale/weight.h b/locale/weight.h
new file mode 100644
index 0000000..5a9bcd7
--- /dev/null
+++ b/locale/weight.h
@@ -0,0 +1,171 @@
+/* Copyright (C) 1996 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+Written by Ulrich Drepper, <drepper@gnu.ai.mit.edu>.
+
+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. */
+
+#include <alloca.h>
+
+
+#ifndef STRING_TYPE
+# error STRING_TYPE not defined
+#endif
+
+#ifndef USTRING_TYPE
+# error USTRING_TYPE not defined
+#endif
+
+typedef struct weight_t
+{
+ struct weight_t *prev;
+ struct weight_t *next;
+ struct data_pair {
+ size_t number;
+ u32_t *value;
+ } data[0];
+} weight_t;
+
+
+/* The following five macros grant access to the non-byte order
+ dependend values in the collate locale file. */
+#define collate_nrules \
+ (_NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_NRULES))
+#define collate_hash_size \
+ (_NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_HASH_SIZE))
+#define collate_hash_layers \
+ (_NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_HASH_LAYERS))
+#define collate_undefined \
+ (_NL_CURRENT_WORD (LC_COLLATE, _NL_COLLATE_UNDEFINED))
+#define collate_rules \
+ (_NL_CURRENT (LC_COLLATE, _NL_COLLATE_RULES))
+
+
+static __inline int get_weight (const STRING_TYPE **str, weight_t *result);
+static __inline int
+get_weight (const STRING_TYPE **str, weight_t *result)
+{
+ unsigned int ch = *((USTRING_TYPE *) (*str))++;
+ size_t slot;
+
+ if (sizeof (STRING_TYPE) == 1)
+ slot = ch * (collate_nrules + 1);
+ else
+ {
+ const size_t level_size = collate_hash_size * (collate_nrules + 1);
+ size_t level;
+
+ slot = (ch * (collate_nrules + 1)) % collate_hash_size;
+
+ level = 0;
+ while (__collate_table[slot] != (u32_t) ch)
+ {
+ if (__collate_table[slot + 1] == 0
+ || ++level >= collate_hash_layers)
+ {
+ size_t idx = collate_undefined;
+ size_t cnt;
+
+ for (cnt = 0; cnt < collate_nrules; ++cnt)
+ {
+ result->data[cnt].number = __collate_extra[idx++];
+ result->data[cnt].value = &__collate_extra[idx];
+ idx += result->data[cnt].number;
+ }
+ return 0;
+ }
+ slot += level_size;
+ }
+ }
+
+ if (__collate_table[slot + 1] != FORWARD_CHAR)
+ {
+ /* We have a simple form. One one value for each weight. */
+ size_t cnt;
+
+ for (cnt = 0; cnt < collate_nrules; ++cnt)
+ {
+ result->data[cnt].number = 1;
+ result->data[cnt].value = &__collate_table[slot + 1 + cnt];
+ }
+ return ch == 0;
+ }
+
+ /* We now look for any collation element which starts with CH.
+ There might none, but the last list member is a catch-all case
+ because it is simple the character CH. The value of this entry
+ might be the same as UNDEFINED. */
+ slot = __collate_table[slot + 2];
+
+ while (1)
+ {
+ size_t idx;
+
+ /* This is a comparison between a u32_t array (aka wchar_t) and
+ an 8-bit string. */
+ for (idx = 0; __collate_extra[slot + 2 + idx] != 0; ++idx)
+ if (__collate_extra[slot + 2 + idx] != (u32_t) str[idx])
+ break;
+
+ /* When the loop finished with all character of the collation
+ element used, we found the longest prefix. */
+ if (__collate_extra[slot + 2 + idx] == 0)
+ {
+ size_t cnt;
+
+ idx += slot + 3;
+ for (cnt = 0; cnt < collate_nrules; ++cnt)
+ {
+ result->data[cnt].number = __collate_extra[idx++];
+ result->data[cnt].value = &__collate_extra[idx];
+ idx += result->data[cnt].number;
+ }
+ return 0;
+ }
+
+ /* To next entry in list. */
+ slot += __collate_extra[slot];
+ }
+ /* NOTREACHED */
+ return 0; /* To calm down gcc. */
+}
+
+
+/* To process a string efficiently we retrieve all information about
+ the string at once. The following macro constructs a double linked
+ list of this information. It is a macro because we use `alloca'
+ and we use a double linked list because of the backward collation
+ order. */
+#define get_string(str, forw, backw) \
+ do \
+ { \
+ weight_t *newp; \
+ do \
+ { \
+ newp = (weight_t *) alloca (sizeof (weight_t) \
+ + (collate_nrules \
+ * sizeof (struct data_pair))); \
+ \
+ newp->prev = backw; \
+ if (backw == NULL) \
+ forw = newp; \
+ else \
+ backw->next = newp; \
+ newp->next = NULL; \
+ backw = newp; \
+ } \
+ while (get_weight (&str, newp) == 0); \
+ } \
+ while (0)