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

1 files changed, 249 insertions, 0 deletions

diff --git a/lib/libiconv_modules/mapper_646/citrus_mapper_646.c b/lib/libiconv_modules/mapper_646/citrus_mapper_646.c
new file mode 100644
index 000000000000..b2775492a259
--- /dev/null
+++ b/lib/libiconv_modules/mapper_646/citrus_mapper_646.c
@@ -0,0 +1,249 @@
+/* $FreeBSD$ */
+/*	$NetBSD: citrus_mapper_646.c,v 1.4 2003/07/14 11:37:49 tshiozak Exp $	*/
+
+/*-
+ * Copyright (c)2003 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 <assert.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "citrus_namespace.h"
+#include "citrus_types.h"
+#include "citrus_bcs.h"
+#include "citrus_module.h"
+#include "citrus_region.h"
+#include "citrus_memstream.h"
+#include "citrus_mmap.h"
+#include "citrus_hash.h"
+#include "citrus_mapper.h"
+#include "citrus_mapper_646.h"
+
+/* ---------------------------------------------------------------------- */
+
+_CITRUS_MAPPER_DECLS(mapper_646);
+_CITRUS_MAPPER_DEF_OPS(mapper_646);
+
+/* ---------------------------------------------------------------------- */
+
+#define ILSEQ	0xFFFFFFFE
+#define INVALID	0xFFFFFFFF
+#define SPECIALS(x)				\
+	x(0x23)					\
+	x(0x24)					\
+	x(0x40)					\
+	x(0x5B)					\
+	x(0x5C)					\
+	x(0x5D)					\
+	x(0x5E)					\
+	x(0x60)					\
+	x(0x7B)					\
+	x(0x7C)					\
+	x(0x7D)					\
+	x(0x7E)
+
+#define INDEX(x) INDEX_##x,
+
+enum {
+	SPECIALS(INDEX)
+	NUM_OF_SPECIALS
+};
+struct _citrus_mapper_646 {
+	_index_t	 m6_map[NUM_OF_SPECIALS];
+	int		 m6_forward;
+};
+
+int
+_citrus_mapper_646_mapper_getops(struct _citrus_mapper_ops *ops)
+{
+
+	memcpy(ops, &_citrus_mapper_646_mapper_ops,
+	    sizeof(_citrus_mapper_646_mapper_ops));
+
+	return (0);
+}
+
+#define T_COMM '#'
+static int
+parse_file(struct _citrus_mapper_646 *m6, const char *path)
+{
+	struct _memstream ms;
+	struct _region r;
+	const char *p;
+	char *pp;
+	size_t len;
+	char buf[PATH_MAX];
+	int i, ret;
+
+	ret = _map_file(&r, path);
+	if (ret)
+		return (ret);
+	_memstream_bind(&ms, &r);
+	for (i = 0; i < NUM_OF_SPECIALS; i++) {
+retry:
+		p = _memstream_getln(&ms, &len);
+		if (p == NULL) {
+			ret = EINVAL;
+			break;
+		}
+		p = _bcs_skip_ws_len(p, &len);
+		if (*p == T_COMM || len==0)
+			goto retry;
+		if (!_bcs_isdigit(*p)) {
+			ret = EINVAL;
+			break;
+		}
+		snprintf(buf, sizeof(buf), "%.*s", (int)len, p);
+		pp = __DECONST(void *, p);
+		m6->m6_map[i] = strtoul(buf, (char **)&pp, 0);
+		p = _bcs_skip_ws(buf);
+		if (*p != T_COMM && !*p) {
+			ret = EINVAL;
+			break;
+		}
+	}
+	_unmap_file(&r);
+
+	return (ret);
+};
+
+static int
+parse_var(struct _citrus_mapper_646 *m6, struct _memstream *ms,
+    const char *dir)
+{
+	struct _region r;
+	char path[PATH_MAX];
+
+	m6->m6_forward = 1;
+	_memstream_skip_ws(ms);
+	/* whether backward */
+	if (_memstream_peek(ms) == '!') {
+		_memstream_getc(ms);
+		m6->m6_forward = 0;
+	}
+	/* get description file path */
+	_memstream_getregion(ms, &r, _memstream_remainder(ms));
+	snprintf(path, sizeof(path), "%s/%.*s",
+		 dir, (int)_region_size(&r), (char *)_region_head(&r));
+	/* remove trailing white spaces */
+	path[_bcs_skip_nonws(path)-path] = '\0';
+	return (parse_file(m6, path));
+}
+
+static int
+/*ARGSUSED*/
+_citrus_mapper_646_mapper_init(struct _citrus_mapper_area *__restrict ma __unused,
+    struct _citrus_mapper * __restrict cm, const char * __restrict dir,
+    const void * __restrict var, size_t lenvar,
+    struct _citrus_mapper_traits * __restrict mt, size_t lenmt)
+{
+	struct _citrus_mapper_646 *m6;
+	struct _memstream ms;
+	struct _region r;
+	int ret;
+
+	if (lenmt < sizeof(*mt))
+		return (EINVAL);
+
+	m6 = malloc(sizeof(*m6));
+	if (m6 == NULL)
+		return (errno);
+
+	_region_init(&r, __DECONST(void *, var), lenvar);
+	_memstream_bind(&ms, &r);
+	ret = parse_var(m6, &ms, dir);
+	if (ret) {
+		free(m6);
+		return (ret);
+	}
+
+	cm->cm_closure = m6;
+	mt->mt_src_max = mt->mt_dst_max = 1;	/* 1:1 converter */
+	mt->mt_state_size = 0;			/* stateless */
+
+	return (0);
+}
+
+static void
+/*ARGSUSED*/
+_citrus_mapper_646_mapper_uninit(struct _citrus_mapper *cm)
+{
+
+	if (cm && cm->cm_closure)
+		free(cm->cm_closure);
+}
+
+static int
+/*ARGSUSED*/
+_citrus_mapper_646_mapper_convert(struct _citrus_mapper * __restrict cm,
+    _index_t * __restrict dst, _index_t src, void * __restrict ps __unused)
+{
+	struct _citrus_mapper_646 *m6;
+
+	m6 = cm->cm_closure;
+	if (m6->m6_forward) {
+		/* forward */
+		if (src >= 0x80)
+			return (_MAPPER_CONVERT_ILSEQ);
+#define FORWARD(x)					\
+if (src == (x))	{					\
+	if (m6->m6_map[INDEX_##x]==INVALID)		\
+		return (_MAPPER_CONVERT_NONIDENTICAL);	\
+	*dst = m6->m6_map[INDEX_##x];			\
+	return (0);					\
+} else
+		SPECIALS(FORWARD);
+		*dst = src;
+	} else {
+		/* backward */
+#define BACKWARD(x)							\
+if (m6->m6_map[INDEX_##x] != INVALID && src == m6->m6_map[INDEX_##x]) {	\
+	*dst = (x);							\
+	return (0);							\
+} else if (src == (x))							\
+	return (_MAPPER_CONVERT_ILSEQ);					\
+else
+		SPECIALS(BACKWARD);
+		if (src >= 0x80)
+			return (_MAPPER_CONVERT_NONIDENTICAL);
+		*dst = src;
+	}
+
+	return (_MAPPER_CONVERT_SUCCESS);
+}
+
+static void
+/*ARGSUSED*/
+_citrus_mapper_646_mapper_init_state(void)
+{
+
+}