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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 /string/strxfrm.c
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 'string/strxfrm.c')
-rw-r--r--string/strxfrm.c175
1 files changed, 166 insertions, 9 deletions
diff --git a/string/strxfrm.c b/string/strxfrm.c
index e40ae1c..7dce9c1 100644
--- a/string/strxfrm.c
+++ b/string/strxfrm.c
@@ -1,5 +1,6 @@
-/* Copyright (C) 1995 Free Software Foundation, Inc.
+/* Copyright (C) 1995, 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
@@ -13,12 +14,87 @@ 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., 675 Mass Ave,
-Cambridge, MA 02139, USA. */
+not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
+#include "localeinfo.h"
+
+#ifndef STRING_TYPE
+# define STRING_TYPE char
+# define USTRING_TYPE unsigned char
+# define STRXFRM strxfrm
+# define STRLEN strlen
+# define STPNCPY __stpncpy
+#endif
+
+/* Include the shared helper functions. `strxfrm'/`wcsxfrm' also use
+ these functions. */
+#include "weight.h"
+
+
+/* Write 32 bit value UTF-8 encoded but only if enough space is left. */
+static __inline size_t
+print_val (value, dest, max, act)
+ u32_t value;
+ STRING_TYPE *dest;
+ size_t max;
+ size_t act;
+{
+ char tmp[6];
+ int idx = 0;
+
+ if (value < 0x80)
+ tmp[idx++] = (char) value;
+ else
+ {
+ tmp[idx++] = '\x80' + (char) (value & 0x3f);
+ value >>= 6;
+
+ if (value < 0x20)
+ tmp[idx++] = '\xc0' + (char) value;
+ else
+ {
+ tmp[idx++] = '\x80' + (char) (value & 0x3f);
+ value >>= 6;
+
+ if (value < 0x10)
+ tmp[idx++] = '\xe0' + (char) value;
+ else
+ {
+ tmp[idx++] = '\x80' + (char) (value & 0x3f);
+ value >>= 6;
+
+ if (value < 0x08)
+ tmp[idx++] = '\xf0' + (char) value;
+ else
+ {
+ tmp[idx++] = '\x80' + (char) (value & 0x3f);
+ value >>= 6;
+
+ if (value < 0x04)
+ tmp[idx++] = '\xf8' + (char) value;
+ else
+ {
+ tmp[idx++] = '\x80' + (char) (value & 0x3f);
+ tmp[idx++] = '\xfc' + (char) (value >> 6);
+ }
+ }
+ }
+ }
+ }
+
+ while (idx-- > 0)
+ {
+ if (act < max)
+ dest[act] = tmp[idx];
+ ++act;
+ }
+
+ return act;
+}
/* Transform SRC into a form such that the result of strcmp
@@ -27,13 +103,94 @@ Cambridge, MA 02139, USA. */
their transformation. The transformed string is put in at
most N characters of DEST and its length is returned. */
size_t
-strxfrm (dest, src, n)
- char *dest;
- const char *src;
+STRXFRM (dest, src, n)
+ STRING_TYPE *dest;
+ const STRING_TYPE *src;
size_t n;
{
- if (n == 0)
- return strlen (src);
+ weight_t *forw = NULL;
+ weight_t *backw = NULL;
+ size_t pass;
+ size_t written;
+
+ /* If the current locale does not specify locale data we use normal
+ 8-bit string comparison. */
+ if (collate_nrules == 0)
+ {
+ if (n != 0)
+ STPNCPY (dest, src, n);
+
+ return STRLEN (src);
+ }
+
+ /* Get full information about the string. This means we get
+ information for all passes in a special data structure. */
+ get_string (src, forw, backw);
+
+ /* Now we have all the information. In at most the given number of
+ passes we can finally decide about the order. */
+ written = 0;
+ for (pass = 0; pass < collate_nrules; ++pass)
+ {
+ int forward = (collate_rules[pass] & sort_forward) != 0;
+ const weight_t *run = forward ? forw : backw;
+ int idx = forward ? 0 : run->data[pass].number - 1;
+
+ do
+ {
+ int ignore = 0;
+ u32_t w;
+
+ /* Here we have to check for IGNORE entries. If these are
+ found we count them and go on witht he next value. */
+ while ((w = run->data[pass].value[idx]) == IGNORE_CHAR)
+ {
+ ++ignore;
+ if ((forward && ++idx >= run->data[pass].number)
+ || (!forward && --idx < 0))
+ {
+ weight_t *nextp = forward ? run->next : run->prev;
+ if (nextp == NULL)
+ {
+ w = 0;
+ break;
+ }
+ run = nextp;
+ idx = forward ? 0 : run->data[pass].number - 1;
+ }
+ }
+
+ /* Now we have information of the number of ignored weights
+ and the value of the next weight. We have to add 2
+ because 0 means EOS and 1 is the intermediate string end. */
+ if ((collate_rules[pass] & sort_position) != 0)
+ written = print_val (ignore + 2, dest, n, written);
+
+ if (w != 0)
+ written = print_val (w, dest, n, written);
+
+ /* We have to increment the index counters. */
+ if ((forward && ++idx >= run->data[pass].number)
+ || (!forward && --idx < 0))
+ if (forward)
+ {
+ run = run->next;
+ idx = 0;
+ }
+ else
+ {
+ run = run->prev;
+ if (run != NULL)
+ idx = run->data[pass].number - 1;
+ }
+ }
+ while (run != NULL);
+
+ /* Write marker for end of word. */
+ if (pass + 1 < collate_nrules)
+ written = print_val (1, dest, n, written);
+ }
- return __stpncpy (dest, src, n) - dest;
+ /* Terminate string. */
+ return print_val (0, dest, n, written);
}