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authorUlrich Drepper <drepper@redhat.com>1999-12-29 07:32:44 +0000
committerUlrich Drepper <drepper@redhat.com>1999-12-29 07:32:44 +0000
commit15a2315cb457be0599d7a662e64aa54e560f96f0 (patch)
tree0e9915fb5d494269e1637674e5a78368d0700f81 /iconvdata/cns11643l2.h
parent6d110ca1858feba75e4b5528d7941770c59d6b5d (diff)
downloadglibc-15a2315cb457be0599d7a662e64aa54e560f96f0.tar.gz
Update.
* iconvdata/Makefile (modules): Add ISO-2022-CN. Add link rules for this module. (distribute): Add iso-2022-cn.c and cns11643l2.h. * iconvdata/cns11643l2.h: New file. * iconvdata/iso-2022-cn.c: New file. * iconvdata/gconv-modules: Add entries for ISO-2022-CN module. * iconvdata/cns11643l1.h (cns11643l1_to_ucs4): Make string argument unsigned. (ucs4_to_cns11643l1): Likewise. * iconvdata/euc-tw.c: Correct parameter passed to cns11643l1_to_ucs4. * iconvdata/iso-2022-kr.c: Remove unnecessary test from conversion loop to UCS4. Optimize recognition of escape sequences a bit.
Diffstat (limited to 'iconvdata/cns11643l2.h')
-rw-r--r--iconvdata/cns11643l2.h85
1 files changed, 85 insertions, 0 deletions
diff --git a/iconvdata/cns11643l2.h b/iconvdata/cns11643l2.h
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+++ b/iconvdata/cns11643l2.h
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+/* Access functions for CNS 11643, plane 2 handling.
+ Copyright (C) 1998, 1999 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+ 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 <stdint.h>
+#include <gconv.h>
+
+/* Table for CNS 11643, plane 2 to UCS4 conversion. */
+extern const uint16_t __cns11643l2_to_ucs4_tab[];
+
+
+static inline uint32_t
+cns11643l2_to_ucs4 (const unsigned char **s, size_t avail,
+ unsigned char offset)
+{
+ unsigned char ch = *(*s);
+ unsigned char ch2;
+ int idx;
+
+ if (ch < offset || (ch - offset) <= 0x20 || (ch - offset) > 0x7d)
+ return __UNKNOWN_10646_CHAR;
+
+ if (avail < 2)
+ return 0;
+
+ ch2 = (*s)[1];
+ if ((ch2 - offset) <= 0x20 || (ch2 - offset) >= 0x7f)
+ return __UNKNOWN_10646_CHAR;
+
+ idx = (ch - 0x21 - offset) * 94 + (ch2 - 0x21 - offset);
+ if (idx > 0x1de1)
+ return __UNKNOWN_10646_CHAR;
+
+ (*s) += 2;
+
+ return __cns11643l2_to_ucs4_tab[idx] ?: ((*s) -= 2, __UNKNOWN_10646_CHAR);
+}
+
+
+/* The table which contains the CNS 11643 level 2 mappings. */
+extern const char __cns11643_from_ucs4_tab[][3];
+
+
+static inline size_t
+ucs4_to_cns11643l2 (uint32_t wch, unsigned char *s, size_t avail)
+{
+ unsigned int ch = (unsigned int) wch;
+ const char *cp = NULL;
+
+ if (ch >= 0x4e07 && ch <= 0x9fa4)
+ {
+ cp = __cns11643_from_ucs4_tab[ch - 0x4e00];
+ if (cp[0] == '\2')
+ ++cp;
+ else
+ cp = NULL;
+ }
+
+ if (cp == NULL)
+ return __UNKNOWN_10646_CHAR;
+
+ if (avail < 2)
+ return 0;
+
+ s[0] = cp[0];
+ s[1] = cp[1];
+
+ return 2;
+}