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authorZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
committerZack Weinberg <zackw@panix.com>2017-06-08 15:39:03 -0400
commit5046dbb4a7eba5eccfd258f92f4735c9ffc8d069 (patch)
tree4470480d904b65cf14ca524f96f79eca818c3eaf /REORG.TODO/iconvdata/iso-ir-165.h
parent199fc19d3aaaf57944ef036e15904febe877fc93 (diff)
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Prepare for radical source tree reorganization. zack/build-layout-experiment
All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).
Diffstat (limited to 'REORG.TODO/iconvdata/iso-ir-165.h')
-rw-r--r--REORG.TODO/iconvdata/iso-ir-165.h106
1 files changed, 106 insertions, 0 deletions
diff --git a/REORG.TODO/iconvdata/iso-ir-165.h b/REORG.TODO/iconvdata/iso-ir-165.h
new file mode 100644
index 0000000000..7e732a2ea2
--- /dev/null
+++ b/REORG.TODO/iconvdata/iso-ir-165.h
@@ -0,0 +1,106 @@
+/* Tables for conversion to and from ISO-IR-165.
+   converting from UCS using gaps.
+   Copyright (C) 2000-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _ISO_IR_165_H
+#define _ISO_IR_165_H	1
+
+#include <gconv.h>
+#include <stdint.h>
+
+struct gap
+{
+  uint16_t start;
+  uint16_t end;
+  int32_t idx;
+};
+
+/* Table for ISO-IR-165 (CCITT Chinese) to UCS4 conversion.  */
+#define ISOIR165_FROMSIZE	0x2284
+extern const uint16_t __isoir165_to_tab[ISOIR165_FROMSIZE];
+
+
+/* XXX If we at some point need an offset value to decode the byte
+   sequences another parameter can be added.  */
+static inline uint32_t
+__attribute ((always_inline))
+isoir165_to_ucs4 (const unsigned char **s, size_t avail)
+{
+  unsigned char ch = *(*s);
+  unsigned char ch2;
+  uint32_t res;
+
+  if (ch <= 0x20 || ch >= 0x7f)
+    return __UNKNOWN_10646_CHAR;
+
+  if (avail < 2)
+    return 0;
+
+  ch2 = (*s)[1];
+  if (ch2 <= 0x20 || ch2 >= 0x7f)
+    return __UNKNOWN_10646_CHAR;
+
+  res = __isoir165_to_tab[(ch - 0x21) * 94 + (ch2 - 0x21)];
+  if (res == 0)
+    return __UNKNOWN_10646_CHAR;
+
+  *s += 2;
+  return res;
+}
+
+
+/* Tables for ISO-IR-165 (CCITT Chinese) from UCS4 conversion.  */
+extern const struct gap __isoir165_from_idx[];
+extern const char __isoir165_from_tab[];
+
+static inline size_t
+__attribute ((always_inline))
+ucs4_to_isoir165 (uint32_t wch, unsigned char *s, size_t avail)
+{
+  unsigned int ch = (unsigned int) wch;
+  const char *cp;
+  const struct gap *rp = __isoir165_from_idx;
+
+  if (ch > 0xffe5)
+    /* This is an illegal character.  */
+    return __UNKNOWN_10646_CHAR;
+
+  while (ch > rp->end)
+    ++rp;
+  if (ch < rp->start)
+    /* This is an illegal character.  */
+    return __UNKNOWN_10646_CHAR;
+
+  /* The two bytes following the index given in this record give the
+     encoding in ISO-IR-165.  Unless the bytes are zero.  */
+  cp = &__isoir165_from_tab[(ch + rp->idx) * 2];
+  if (*cp == '\0')
+    /* This is an illegal character.  */
+    return __UNKNOWN_10646_CHAR;
+
+  if (avail < 2)
+    return 0;
+
+  s[0] = cp[0];
+  s[1] = cp[1];
+
+  return 2;
+}
+
+#endif	/* iso-ir-165.h */