Add the BSD-licensed Citrus iconv to the base system with default off

setting. It can be built by setting the WITH_ICONV knob. While this
knob is unset, the library part, the binaries, the header file and
the metadata files will not be built or installed so it makes no impact
on the system if left turned off.

This work is based on the iconv implementation in NetBSD but a great
number of improvements and feature additions have been included:

- Some utilities have been added. There is a conversion table generator,
  which can compare conversion tables to reference data generated by
  GNU libiconv. This helps ensuring conversion compatibility.
- UTF-16 surrogate support and some endianness issues have been fixed.
- The rather chaotic Makefiles to build metadata have been refactored
  and cleaned up, now it is easy to read and it is also easier to add
  support for new encodings.
- A bunch of new encodings and encoding aliases have been added.
- Support for 1->2, 1->3 and 1->4 mappings, which is needed for
  transliterating with flying accents as GNU does, like "u.
- Lots of warnings have been fixed, the major part of the code is
  now WARNS=6 clean.
- New section 1 and section 5 manual pages have been added.
- Some GNU-specific calls have been implemented:
  iconvlist(), iconvctl(), iconv_canonicalize(), iconv_open_into()
- Support for GNU's //IGNORE suffix has been added.
- The "-" argument for stdin is now recognized in iconv(1) as per POSIX.
- The Big5 conversion module has been fixed.
- The iconv.h header files is supposed to be compatible with the
  GNU version, i.e. sources should build with base iconv.h and
  GNU libiconv. It also includes a macro magic to deal with the
  char ** and const char ** incompatibility.
- GNU compatibility: "" or "char" means the current local
  encoding in use
- Various cleanups and style(9) fixes.

Approved by:	delphij (mentor)
Obtained from:	The NetBSD Project
Sponsored by:	Google Summer of Code 2009

3 files changed, 691 insertions, 0 deletions

diff --git a/lib/libiconv_modules/HZ/Makefile b/lib/libiconv_modules/HZ/Makefile
new file mode 100644
index 0000000..a501187
--- /dev/null
+++ b/lib/libiconv_modules/HZ/Makefile
@@ -0,0 +1,6 @@
+# $FreeBSD$
+
+SHLIB=	HZ
+SRCS+=	citrus_hz.c
+
+.include <bsd.lib.mk>
diff --git a/lib/libiconv_modules/HZ/citrus_hz.c b/lib/libiconv_modules/HZ/citrus_hz.c
new file mode 100644
index 0000000..3775ea6
--- /dev/null
+++ b/lib/libiconv_modules/HZ/citrus_hz.c
@@ -0,0 +1,648 @@
+/* $FreeBSD$ */
+/* $NetBSD: citrus_hz.c,v 1.2 2008/06/14 16:01:07 tnozaki Exp $ */
+
+/*-
+ * Copyright (c)2004, 2006 Citrus Project,
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ */
+
+#include <sys/cdefs.h>
+#include <sys/queue.h>
+#include <sys/types.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+#include "citrus_namespace.h"
+#include "citrus_types.h"
+#include "citrus_bcs.h"
+#include "citrus_module.h"
+#include "citrus_stdenc.h"
+
+#include "citrus_hz.h"
+#include "citrus_prop.h"
+
+/*
+ * wchar_t mapping:
+ *
+ * CTRL/ASCII	00000000 00000000 00000000 gxxxxxxx
+ * GB2312	00000000 00000000 0xxxxxxx gxxxxxxx
+ * 94/96*n (~M)	0mmmmmmm 0xxxxxxx 0xxxxxxx gxxxxxxx
+ */
+
+#define ESCAPE_CHAR	'~'
+
+typedef enum {
+	CTRL = 0, ASCII = 1, GB2312 = 2, CS94 = 3, CS96 = 4
+} charset_t;
+
+typedef struct {
+	int	 end;
+	int	 start;
+	int	 width;
+} range_t;
+
+static const range_t ranges[] = {
+#define RANGE(start, end) { start, end, (end - start) + 1 }
+/* CTRL   */ RANGE(0x00, 0x1F),
+/* ASCII  */ RANGE(0x20, 0x7F),
+/* GB2312 */ RANGE(0x21, 0x7E),
+/* CS94   */ RANGE(0x21, 0x7E),
+/* CS96   */ RANGE(0x20, 0x7F),
+#undef RANGE
+};
+
+typedef struct escape_t escape_t;
+typedef struct {
+	charset_t	 charset;
+	escape_t	*escape;
+	ssize_t		 length;
+#define ROWCOL_MAX	3
+} graphic_t;
+
+typedef TAILQ_HEAD(escape_list, escape_t) escape_list;
+struct escape_t {
+	TAILQ_ENTRY(escape_t)	 entry;
+	escape_list		*set;
+	graphic_t		*left;
+	graphic_t		*right;
+	int			 ch;
+};
+
+#define GL(escape)	((escape)->left)
+#define GR(escape)	((escape)->right)
+#define SET(escape)	((escape)->set)
+#define ESC(escape)	((escape)->ch)
+#define INIT(escape)	(TAILQ_FIRST(SET(escape)))
+
+static __inline escape_t *
+find_escape(escape_list *set, int ch)
+{
+	escape_t *escape;
+
+	TAILQ_FOREACH(escape, set, entry) {
+		if (ESC(escape) == ch)
+			break;
+	}
+
+	return (escape);
+}
+
+typedef struct {
+	escape_list	 e0;
+	escape_list	 e1;
+	graphic_t	*ascii;
+	graphic_t	*gb2312;
+} _HZEncodingInfo;
+
+#define E0SET(ei)	(&(ei)->e0)
+#define E1SET(ei)	(&(ei)->e1)
+#define INIT0(ei)	(TAILQ_FIRST(E0SET(ei)))
+#define INIT1(ei)	(TAILQ_FIRST(E1SET(ei)))
+
+typedef struct {
+	escape_t	*inuse;
+	int		 chlen;
+	char		 ch[ROWCOL_MAX];
+} _HZState;
+
+#define _CEI_TO_EI(_cei_)		(&(_cei_)->ei)
+#define _CEI_TO_STATE(_cei_, _func_)	(_cei_)->states.s_##_func_
+
+#define _FUNCNAME(m)			_citrus_HZ_##m
+#define _ENCODING_INFO			_HZEncodingInfo
+#define _ENCODING_STATE			_HZState
+#define _ENCODING_MB_CUR_MAX(_ei_)	MB_LEN_MAX
+#define _ENCODING_IS_STATE_DEPENDENT		1
+#define _STATE_NEEDS_EXPLICIT_INIT(_ps_)	((_ps_)->inuse == NULL)
+
+static __inline void
+_citrus_HZ_init_state(_HZEncodingInfo * __restrict ei,
+    _HZState * __restrict psenc)
+{
+
+	psenc->chlen = 0;
+	psenc->inuse = INIT0(ei);
+}
+
+static __inline void
+/*ARGSUSED*/
+_citrus_HZ_pack_state(_HZEncodingInfo * __restrict ei __unused,
+    void *__restrict pspriv, const _HZState * __restrict psenc)
+{
+
+	memcpy(pspriv, (const void *)psenc, sizeof(*psenc));
+}
+
+static __inline void
+/*ARGSUSED*/
+_citrus_HZ_unpack_state(_HZEncodingInfo * __restrict ei __unused,
+    _HZState * __restrict psenc, const void * __restrict pspriv)
+{
+
+	memcpy((void *)psenc, pspriv, sizeof(*psenc));
+}
+
+static int
+_citrus_HZ_mbrtowc_priv(_HZEncodingInfo * __restrict ei,
+    wchar_t * __restrict pwc, char ** __restrict s, size_t n,
+    _HZState * __restrict psenc, size_t * __restrict nresult)
+{
+	escape_t *candidate, *init;
+	graphic_t *graphic;
+	const range_t *range;
+	char *s0;
+	wchar_t wc;
+	int bit, ch, head, len, tail;
+
+	if (*s == NULL) {
+		_citrus_HZ_init_state(ei, psenc);
+		*nresult = 1;
+		return (0);
+	}
+	s0 = *s;
+	if (psenc->chlen < 0 || psenc->inuse == NULL)
+		return (EINVAL);
+
+	wc = (wchar_t)0;
+	bit = head = tail = 0;
+	graphic = NULL;
+	for (len = 0; len <= MB_LEN_MAX;) {
+		if (psenc->chlen == tail) {
+			if (n-- < 1) {
+				*s = s0;
+				*nresult = (size_t)-2;
+				return (0);
+			}
+			psenc->ch[psenc->chlen++] = *s0++;
+			++len;
+		}
+		ch = (unsigned char)psenc->ch[tail++];
+		if (tail == 1) {
+			if ((ch & ~0x80) <= 0x1F) {
+				if (psenc->inuse != INIT0(ei))
+					break;
+				wc = (wchar_t)ch;
+				goto done;
+			}
+			if (ch & 0x80) {
+				graphic = GR(psenc->inuse);
+				bit = 0x80;
+				ch &= ~0x80;
+			} else {
+				graphic = GL(psenc->inuse);
+				if (ch == ESCAPE_CHAR)
+					continue;
+				bit = 0x0;
+			}
+			if (graphic == NULL)
+				break;
+		} else if (tail == 2 && psenc->ch[0] == ESCAPE_CHAR) {
+			if (tail < psenc->chlen)
+				return (EINVAL);
+			if (ch == ESCAPE_CHAR) {
+				++head;
+			} else if (ch == '\n') {
+				if (psenc->inuse != INIT0(ei))
+					break;
+				tail = psenc->chlen = 0;
+				continue;
+			} else {
+				candidate = NULL;
+				init = INIT0(ei);
+				if (psenc->inuse == init) {
+					init = INIT1(ei);
+				} else if (INIT(psenc->inuse) == init) {
+					if (ESC(init) != ch)
+						break;
+					candidate = init;
+				}
+				if (candidate == NULL) {
+					candidate = find_escape(
+					    SET(psenc->inuse), ch);
+					if (candidate == NULL) {
+						if (init == NULL ||
+						    ESC(init) != ch)
+							break;
+						candidate = init;
+					}
+				}
+				psenc->inuse = candidate;
+				tail = psenc->chlen = 0;
+				continue;
+			}
+		} else if (ch & 0x80) {
+			if (graphic != GR(psenc->inuse))
+				break;
+			ch &= ~0x80;
+		} else {
+			if (graphic != GL(psenc->inuse))
+				break;
+		}
+		range = &ranges[(size_t)graphic->charset];
+		if (range->start > ch || range->end < ch)
+			break;
+		wc <<= 8;
+		wc |= ch;
+		if (graphic->length == (tail - head)) {
+			if (graphic->charset > GB2312)
+				bit |= ESC(psenc->inuse) << 24;
+			wc |= bit;
+			goto done;
+		}
+	}
+	*nresult = (size_t)-1;
+	return (EILSEQ);
+done:
+	if (tail < psenc->chlen)
+		return (EINVAL);
+	*s = s0;
+	if (pwc != NULL)
+		*pwc = wc;
+	psenc->chlen = 0;
+	*nresult = (wc == 0) ? 0 : len;
+
+	return (0);
+}
+
+static int
+_citrus_HZ_wcrtomb_priv(_HZEncodingInfo * __restrict ei,
+    char * __restrict s, size_t n, wchar_t wc,
+    _HZState * __restrict psenc, size_t * __restrict nresult)
+{
+	escape_t *candidate, *init;
+	graphic_t *graphic;
+	const range_t *range;
+	size_t len;
+	int bit, ch;
+
+	if (psenc->chlen != 0 || psenc->inuse == NULL)
+		return (EINVAL);
+	if (wc & 0x80) {
+		bit = 0x80;
+		wc &= ~0x80;
+	} else {
+		bit = 0x0;
+	}
+	if ((uint32_t)wc <= 0x1F) {
+		candidate = INIT0(ei);
+		graphic = (bit == 0) ? candidate->left : candidate->right;
+		if (graphic == NULL)
+			goto ilseq;
+		range = &ranges[(size_t)CTRL];
+		len = 1;
+	} else if ((uint32_t)wc <= 0x7F) {
+		graphic = ei->ascii;
+		if (graphic == NULL)
+			goto ilseq;
+		candidate = graphic->escape;
+		range = &ranges[(size_t)graphic->charset];
+		len = graphic->length;
+	} else if ((uint32_t)wc <= 0x7F7F) {
+		graphic = ei->gb2312;
+		if (graphic == NULL)
+			goto ilseq;
+		candidate = graphic->escape;
+		range = &ranges[(size_t)graphic->charset];
+		len = graphic->length;
+	} else {
+		ch = (wc >> 24) & 0xFF;
+		candidate = find_escape(E0SET(ei), ch);
+		if (candidate == NULL) {
+			candidate = find_escape(E1SET(ei), ch);
+			if (candidate == NULL)
+				goto ilseq;
+		}
+		wc &= ~0xFF000000;
+		graphic = (bit == 0) ? candidate->left : candidate->right;
+		if (graphic == NULL)
+			goto ilseq;
+		range = &ranges[(size_t)graphic->charset];
+		len = graphic->length;
+	}
+	if (psenc->inuse != candidate) {
+		init = INIT0(ei);
+		if (SET(psenc->inuse) == SET(candidate)) {
+			if (INIT(psenc->inuse) != init ||
+			    psenc->inuse == init || candidate == init)
+				init = NULL;
+		} else if (candidate == (init = INIT(candidate))) {
+			init = NULL;
+		}
+		if (init != NULL) {
+			if (n < 2)
+				return (E2BIG);
+			n -= 2;
+			psenc->ch[psenc->chlen++] = ESCAPE_CHAR;
+			psenc->ch[psenc->chlen++] = ESC(init);
+		}
+		if (n < 2)
+			return (E2BIG);
+		n -= 2;
+		psenc->ch[psenc->chlen++] = ESCAPE_CHAR;
+		psenc->ch[psenc->chlen++] = ESC(candidate);
+		psenc->inuse = candidate;
+	}
+	if (n < len)
+		return (E2BIG);
+	while (len-- > 0) {
+		ch = (wc >> (len * 8)) & 0xFF;
+		if (range->start > ch || range->end < ch)
+			goto ilseq;
+		psenc->ch[psenc->chlen++] = ch | bit;
+	}
+	memcpy(s, psenc->ch, psenc->chlen);
+	*nresult = psenc->chlen;
+	psenc->chlen = 0;
+
+	return (0);
+
+ilseq:
+	*nresult = (size_t)-1;
+	return (EILSEQ);
+}
+
+static __inline int
+_citrus_HZ_put_state_reset(_HZEncodingInfo * __restrict ei,
+    char * __restrict s, size_t n, _HZState * __restrict psenc,
+    size_t * __restrict nresult)
+{
+	escape_t *candidate;
+
+	if (psenc->chlen != 0 || psenc->inuse == NULL)
+		return (EINVAL);
+	candidate = INIT0(ei);
+	if (psenc->inuse != candidate) {
+		if (n < 2)
+			return (E2BIG);
+		n -= 2;
+		psenc->ch[psenc->chlen++] = ESCAPE_CHAR;
+		psenc->ch[psenc->chlen++] = ESC(candidate);
+	}
+	if (n < 1)
+		return (E2BIG);
+	if (psenc->chlen > 0)
+		memcpy(s, psenc->ch, psenc->chlen);
+	*nresult = psenc->chlen;
+	_citrus_HZ_init_state(ei, psenc);
+
+	return (0);
+}
+
+static __inline int
+_citrus_HZ_stdenc_get_state_desc_generic(_HZEncodingInfo * __restrict ei,
+    _HZState * __restrict psenc, int * __restrict rstate)
+{
+
+	if (psenc->chlen < 0 || psenc->inuse == NULL)
+		return (EINVAL);
+	*rstate = (psenc->chlen == 0)
+	    ? ((psenc->inuse == INIT0(ei))
+	        ? _STDENC_SDGEN_INITIAL
+	        : _STDENC_SDGEN_STABLE)
+	    : ((psenc->ch[0] == ESCAPE_CHAR)
+	        ? _STDENC_SDGEN_INCOMPLETE_SHIFT
+	        : _STDENC_SDGEN_INCOMPLETE_CHAR);
+
+	return (0);
+}
+
+static __inline int
+/*ARGSUSED*/
+_citrus_HZ_stdenc_wctocs(_HZEncodingInfo * __restrict ei __unused,
+    _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
+{
+	int bit;
+
+	if (wc & 0x80) {
+		bit = 0x80;
+		wc &= ~0x80;
+	} else
+		bit = 0x0;
+	if ((uint32_t)wc <= 0x7F) {
+		*csid = (_csid_t)bit;
+		*idx = (_index_t)wc;
+	} else if ((uint32_t)wc <= 0x7F7F) {
+		*csid = (_csid_t)(bit | 0x8000);
+		*idx = (_index_t)wc;
+	} else {
+		*csid = (_index_t)(wc & ~0x00FFFF7F);
+		*idx = (_csid_t)(wc & 0x00FFFF7F);
+	}
+
+	return (0);
+}
+
+static __inline int
+/*ARGSUSED*/
+_citrus_HZ_stdenc_cstowc(_HZEncodingInfo * __restrict ei __unused,
+    wchar_t * __restrict wc, _csid_t csid, _index_t idx)
+{
+
+	*wc = (wchar_t)idx;
+	switch (csid) {
+	case 0x80:
+	case 0x8080:
+		*wc |= (wchar_t)0x80;
+		/*FALLTHROUGH*/
+	case 0x0:
+	case 0x8000:
+		break;
+	default:
+		*wc |= (wchar_t)csid;
+	}
+
+	return (0);
+}
+
+static void
+_citrus_HZ_encoding_module_uninit(_HZEncodingInfo *ei)
+{
+	escape_t *escape;
+
+	while ((escape = TAILQ_FIRST(E0SET(ei))) != NULL) {
+		TAILQ_REMOVE(E0SET(ei), escape, entry);
+		free(GL(escape));
+		free(GR(escape));
+		free(escape);
+	}
+	while ((escape = TAILQ_FIRST(E1SET(ei))) != NULL) {
+		TAILQ_REMOVE(E1SET(ei), escape, entry);
+		free(GL(escape));
+		free(GR(escape));
+		free(escape);
+	}
+}
+
+static int
+_citrus_HZ_parse_char(void **context, const char *name __unused, const char *s)
+{
+	escape_t *escape;
+	void **p;
+
+	p = (void **)*context;
+	escape = (escape_t *)p[0];
+	if (escape->ch != '\0')
+		return (EINVAL);
+	escape->ch = *s++;
+	if (escape->ch == ESCAPE_CHAR || *s != '\0')
+		return (EINVAL);
+
+	return (0);
+}
+
+static int
+_citrus_HZ_parse_graphic(void **context, const char *name, const char *s)
+{
+	_HZEncodingInfo *ei;
+	escape_t *escape;
+	graphic_t *graphic;
+	void **p;
+
+	p = (void **)*context;
+	escape = (escape_t *)p[0];
+	ei = (_HZEncodingInfo *)p[1];
+	graphic = malloc(sizeof(*graphic));
+	if (graphic == NULL)
+		return (ENOMEM);
+	memset(graphic, 0, sizeof(*graphic));
+	if (strcmp("GL", name) == 0) {
+		if (GL(escape) != NULL)
+			goto release;
+		GL(escape) = graphic;
+	} else if (strcmp("GR", name) == 0) {
+		if (GR(escape) != NULL)
+			goto release;
+		GR(escape) = graphic;
+	} else {
+release:
+		free(graphic);
+		return (EINVAL);
+	}
+	graphic->escape = escape;
+	if (_bcs_strncasecmp("ASCII", s, 5) == 0) {
+		if (s[5] != '\0')
+			return (EINVAL);
+		graphic->charset = ASCII;
+		graphic->length = 1;
+		ei->ascii = graphic;
+		return (0);
+	} else if (_bcs_strncasecmp("GB2312", s, 6) == 0) {
+		if (s[6] != '\0')
+			return (EINVAL);
+		graphic->charset = GB2312;
+		graphic->length = 2;
+		ei->gb2312 = graphic;
+		return (0);
+	} else if (strncmp("94*", s, 3) == 0)
+		graphic->charset = CS94;
+	else if (strncmp("96*", s, 3) == 0)
+		graphic->charset = CS96;
+	else
+		return (EINVAL);
+	s += 3;
+	switch(*s) {
+	case '1': case '2': case '3':
+		graphic->length = (size_t)(*s - '0');
+		if (*++s == '\0')
+			break;
+	/*FALLTHROUGH*/
+	default:
+		return (EINVAL);
+	}
+	return (0);
+}
+
+static const _citrus_prop_hint_t escape_hints[] = {
+_CITRUS_PROP_HINT_STR("CH", &_citrus_HZ_parse_char),
+_CITRUS_PROP_HINT_STR("GL", &_citrus_HZ_parse_graphic),
+_CITRUS_PROP_HINT_STR("GR", &_citrus_HZ_parse_graphic),
+_CITRUS_PROP_HINT_END
+};
+
+static int
+_citrus_HZ_parse_escape(void **context, const char *name, const char *s)
+{
+	_HZEncodingInfo *ei;
+	escape_t *escape;
+	void *p[2];
+
+	ei = (_HZEncodingInfo *)*context;
+	escape = malloc(sizeof(*escape));
+	if (escape == NULL)
+		return (EINVAL);
+	memset(escape, 0, sizeof(*escape));
+	if (strcmp("0", name) == 0) {
+		escape->set = E0SET(ei);
+		TAILQ_INSERT_TAIL(E0SET(ei), escape, entry);
+	} else if (strcmp("1", name) == 0) {
+		escape->set = E1SET(ei);
+		TAILQ_INSERT_TAIL(E1SET(ei), escape, entry);
+	} else {
+		free(escape);
+		return (EINVAL);
+	}
+	p[0] = (void *)escape;
+	p[1] = (void *)ei;
+	return (_citrus_prop_parse_variable(
+	    escape_hints, (void *)&p[0], s, strlen(s)));
+}
+
+static const _citrus_prop_hint_t root_hints[] = {
+_CITRUS_PROP_HINT_STR("0", &_citrus_HZ_parse_escape),
+_CITRUS_PROP_HINT_STR("1", &_citrus_HZ_parse_escape),
+_CITRUS_PROP_HINT_END
+};
+
+static int
+_citrus_HZ_encoding_module_init(_HZEncodingInfo * __restrict ei,
+    const void * __restrict var, size_t lenvar)
+{
+	int errnum;
+
+	memset(ei, 0, sizeof(*ei));
+	TAILQ_INIT(E0SET(ei));
+	TAILQ_INIT(E1SET(ei));
+	errnum = _citrus_prop_parse_variable(
+	    root_hints, (void *)ei, var, lenvar);
+	if (errnum != 0)
+		_citrus_HZ_encoding_module_uninit(ei);
+	return (errnum);
+}
+
+/* ----------------------------------------------------------------------
+ * public interface for stdenc
+ */
+
+_CITRUS_STDENC_DECLS(HZ);
+_CITRUS_STDENC_DEF_OPS(HZ);
+
+#include "citrus_stdenc_template.h"
diff --git a/lib/libiconv_modules/HZ/citrus_hz.h b/lib/libiconv_modules/HZ/citrus_hz.h
new file mode 100644
index 0000000..9737b7b
--- /dev/null
+++ b/lib/libiconv_modules/HZ/citrus_hz.h
@@ -0,0 +1,37 @@
+/* $FreeBSD$ */
+/* $NetBSD: citrus_hz.h,v 1.1 2006/11/22 23:38:27 tnozaki Exp $ */
+
+/*-
+ * Copyright (c)2004, 2006 Citrus Project,
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _CITRUS_HZ_H_
+#define _CITRUS_HZ_H_
+
+__BEGIN_DECLS
+_CITRUS_STDENC_GETOPS_FUNC(HZ);
+__END_DECLS
+
+#endif