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Diffstat (limited to 'lib/libiconv_modules/UTF1632/citrus_utf1632.c')
-rw-r--r--lib/libiconv_modules/UTF1632/citrus_utf1632.c453
1 files changed, 453 insertions, 0 deletions
diff --git a/lib/libiconv_modules/UTF1632/citrus_utf1632.c b/lib/libiconv_modules/UTF1632/citrus_utf1632.c
new file mode 100644
index 000000000000..6682ab279692
--- /dev/null
+++ b/lib/libiconv_modules/UTF1632/citrus_utf1632.c
@@ -0,0 +1,453 @@
+/* $FreeBSD$ */
+/* $NetBSD: citrus_utf1632.c,v 1.9 2008/06/14 16:01:08 tnozaki 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/endian.h>
+#include <sys/types.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wchar.h>
+
+#include "citrus_namespace.h"
+#include "citrus_types.h"
+#include "citrus_module.h"
+#include "citrus_stdenc.h"
+#include "citrus_bcs.h"
+
+#include "citrus_utf1632.h"
+
+
+/* ----------------------------------------------------------------------
+ * private stuffs used by templates
+ */
+
+typedef struct {
+ int chlen;
+ int current_endian;
+ uint8_t ch[4];
+} _UTF1632State;
+
+#define _ENDIAN_UNKNOWN 0
+#define _ENDIAN_BIG 1
+#define _ENDIAN_LITTLE 2
+#if BYTE_ORDER == BIG_ENDIAN
+#define _ENDIAN_INTERNAL _ENDIAN_BIG
+#define _ENDIAN_SWAPPED _ENDIAN_LITTLE
+#else
+#define _ENDIAN_INTERNAL _ENDIAN_LITTLE
+#define _ENDIAN_SWAPPED _ENDIAN_BIG
+#endif
+#define _MODE_UTF32 0x00000001U
+#define _MODE_FORCE_ENDIAN 0x00000002U
+
+typedef struct {
+ int preffered_endian;
+ unsigned int cur_max;
+ uint32_t mode;
+} _UTF1632EncodingInfo;
+
+#define _FUNCNAME(m) _citrus_UTF1632_##m
+#define _ENCODING_INFO _UTF1632EncodingInfo
+#define _ENCODING_STATE _UTF1632State
+#define _ENCODING_MB_CUR_MAX(_ei_) ((_ei_)->cur_max)
+#define _ENCODING_IS_STATE_DEPENDENT 0
+#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
+
+
+static __inline void
+/*ARGSUSED*/
+_citrus_UTF1632_init_state(_UTF1632EncodingInfo *ei __unused,
+ _UTF1632State *s)
+{
+
+ memset(s, 0, sizeof(*s));
+}
+
+static int
+_citrus_UTF1632_mbrtowc_priv(_UTF1632EncodingInfo *ei, wchar_t *pwc,
+ char **s, size_t n, _UTF1632State *psenc, size_t *nresult)
+{
+ char *s0;
+ size_t result;
+ wchar_t wc = L'\0';
+ int chlenbak, endian, needlen;
+
+ s0 = *s;
+
+ if (s0 == NULL) {
+ _citrus_UTF1632_init_state(ei, psenc);
+ *nresult = 0; /* state independent */
+ return (0);
+ }
+
+ result = 0;
+ chlenbak = psenc->chlen;
+
+refetch:
+ needlen = ((ei->mode & _MODE_UTF32) != 0 || chlenbak >= 2) ? 4 : 2;
+
+ while (chlenbak < needlen) {
+ if (n == 0)
+ goto restart;
+ psenc->ch[chlenbak++] = *s0++;
+ n--;
+ result++;
+ }
+
+ /* judge endian marker */
+ if ((ei->mode & _MODE_UTF32) == 0) {
+ /* UTF16 */
+ if (psenc->ch[0] == 0xFE && psenc->ch[1] == 0xFF) {
+ psenc->current_endian = _ENDIAN_BIG;
+ chlenbak = 0;
+ goto refetch;
+ } else if (psenc->ch[0] == 0xFF && psenc->ch[1] == 0xFE) {
+ psenc->current_endian = _ENDIAN_LITTLE;
+ chlenbak = 0;
+ goto refetch;
+ }
+ } else {
+ /* UTF32 */
+ if (psenc->ch[0] == 0x00 && psenc->ch[1] == 0x00 &&
+ psenc->ch[2] == 0xFE && psenc->ch[3] == 0xFF) {
+ psenc->current_endian = _ENDIAN_BIG;
+ chlenbak = 0;
+ goto refetch;
+ } else if (psenc->ch[0] == 0xFF && psenc->ch[1] == 0xFE &&
+ psenc->ch[2] == 0x00 && psenc->ch[3] == 0x00) {
+ psenc->current_endian = _ENDIAN_LITTLE;
+ chlenbak = 0;
+ goto refetch;
+ }
+ }
+ endian = ((ei->mode & _MODE_FORCE_ENDIAN) != 0 ||
+ psenc->current_endian == _ENDIAN_UNKNOWN) ? ei->preffered_endian :
+ psenc->current_endian;
+
+ /* get wc */
+ if ((ei->mode & _MODE_UTF32) == 0) {
+ /* UTF16 */
+ if (needlen == 2) {
+ switch (endian) {
+ case _ENDIAN_LITTLE:
+ wc = (psenc->ch[0] |
+ ((wchar_t)psenc->ch[1] << 8));
+ break;
+ case _ENDIAN_BIG:
+ wc = (psenc->ch[1] |
+ ((wchar_t)psenc->ch[0] << 8));
+ break;
+ default:
+ goto ilseq;
+ }
+ if (wc >= 0xD800 && wc <= 0xDBFF) {
+ /* surrogate high */
+ needlen = 4;
+ goto refetch;
+ }
+ } else {
+ /* surrogate low */
+ wc -= 0xD800; /* wc : surrogate high (see above) */
+ wc <<= 10;
+ switch (endian) {
+ case _ENDIAN_LITTLE:
+ if (psenc->ch[3] < 0xDC || psenc->ch[3] > 0xDF)
+ goto ilseq;
+ wc |= psenc->ch[2];
+ wc |= (wchar_t)(psenc->ch[3] & 3) << 8;
+ break;
+ case _ENDIAN_BIG:
+ if (psenc->ch[2]<0xDC || psenc->ch[2]>0xDF)
+ goto ilseq;
+ wc |= psenc->ch[3];
+ wc |= (wchar_t)(psenc->ch[2] & 3) << 8;
+ break;
+ default:
+ goto ilseq;
+ }
+ wc += 0x10000;
+ }
+ } else {
+ /* UTF32 */
+ switch (endian) {
+ case _ENDIAN_LITTLE:
+ wc = (psenc->ch[0] |
+ ((wchar_t)psenc->ch[1] << 8) |
+ ((wchar_t)psenc->ch[2] << 16) |
+ ((wchar_t)psenc->ch[3] << 24));
+ break;
+ case _ENDIAN_BIG:
+ wc = (psenc->ch[3] |
+ ((wchar_t)psenc->ch[2] << 8) |
+ ((wchar_t)psenc->ch[1] << 16) |
+ ((wchar_t)psenc->ch[0] << 24));
+ break;
+ default:
+ goto ilseq;
+ }
+ if (wc >= 0xD800 && wc <= 0xDFFF)
+ goto ilseq;
+ }
+
+
+ *pwc = wc;
+ psenc->chlen = 0;
+ *nresult = result;
+ *s = s0;
+
+ return (0);
+
+ilseq:
+ *nresult = (size_t)-1;
+ psenc->chlen = 0;
+ return (EILSEQ);
+
+restart:
+ *nresult = (size_t)-2;
+ psenc->chlen = chlenbak;
+ *s = s0;
+ return (0);
+}
+
+static int
+_citrus_UTF1632_wcrtomb_priv(_UTF1632EncodingInfo *ei, char *s, size_t n,
+ wchar_t wc, _UTF1632State *psenc, size_t *nresult)
+{
+ wchar_t wc2;
+ static const char _bom[4] = {
+ 0x00, 0x00, 0xFE, 0xFF,
+ };
+ const char *bom = &_bom[0];
+ size_t cnt;
+
+ cnt = (size_t)0;
+ if (psenc->current_endian == _ENDIAN_UNKNOWN) {
+ if ((ei->mode & _MODE_FORCE_ENDIAN) == 0) {
+ if (ei->mode & _MODE_UTF32)
+ cnt = 4;
+ else {
+ cnt = 2;
+ bom += 2;
+ }
+ if (n < cnt)
+ goto e2big;
+ memcpy(s, bom, cnt);
+ s += cnt, n -= cnt;
+ }
+ psenc->current_endian = ei->preffered_endian;
+ }
+
+ wc2 = 0;
+ if ((ei->mode & _MODE_UTF32)==0) {
+ /* UTF16 */
+ if (wc > 0xFFFF) {
+ /* surrogate */
+ if (wc > 0x10FFFF)
+ goto ilseq;
+ if (n < 4)
+ goto e2big;
+ cnt += 4;
+ wc -= 0x10000;
+ wc2 = (wc & 0x3FF) | 0xDC00;
+ wc = (wc>>10) | 0xD800;
+ } else {
+ if (n < 2)
+ goto e2big;
+ cnt += 2;
+ }
+
+surrogate:
+ switch (psenc->current_endian) {
+ case _ENDIAN_BIG:
+ s[1] = wc;
+ s[0] = (wc >>= 8);
+ break;
+ case _ENDIAN_LITTLE:
+ s[0] = wc;
+ s[1] = (wc >>= 8);
+ break;
+ }
+ if (wc2 != 0) {
+ wc = wc2;
+ wc2 = 0;
+ s += 2;
+ goto surrogate;
+ }
+ } else {
+ /* UTF32 */
+ if (wc >= 0xD800 && wc <= 0xDFFF)
+ goto ilseq;
+ if (n < 4)
+ goto e2big;
+ cnt += 4;
+ switch (psenc->current_endian) {
+ case _ENDIAN_BIG:
+ s[3] = wc;
+ s[2] = (wc >>= 8);
+ s[1] = (wc >>= 8);
+ s[0] = (wc >>= 8);
+ break;
+ case _ENDIAN_LITTLE:
+ s[0] = wc;
+ s[1] = (wc >>= 8);
+ s[2] = (wc >>= 8);
+ s[3] = (wc >>= 8);
+ break;
+ }
+ }
+ *nresult = cnt;
+
+ return (0);
+
+ilseq:
+ *nresult = (size_t)-1;
+ return (EILSEQ);
+e2big:
+ *nresult = (size_t)-1;
+ return (E2BIG);
+}
+
+static void
+parse_variable(_UTF1632EncodingInfo * __restrict ei,
+ const void * __restrict var, size_t lenvar)
+{
+ const char *p;
+
+ p = var;
+ while (lenvar > 0) {
+ switch (*p) {
+ case 'B':
+ case 'b':
+ MATCH(big, ei->preffered_endian = _ENDIAN_BIG);
+ break;
+ case 'L':
+ case 'l':
+ MATCH(little, ei->preffered_endian = _ENDIAN_LITTLE);
+ break;
+ case 'i':
+ case 'I':
+ MATCH(internal, ei->preffered_endian = _ENDIAN_INTERNAL);
+ break;
+ case 's':
+ case 'S':
+ MATCH(swapped, ei->preffered_endian = _ENDIAN_SWAPPED);
+ break;
+ case 'F':
+ case 'f':
+ MATCH(force, ei->mode |= _MODE_FORCE_ENDIAN);
+ break;
+ case 'U':
+ case 'u':
+ MATCH(utf32, ei->mode |= _MODE_UTF32);
+ break;
+ }
+ p++;
+ lenvar--;
+ }
+}
+
+static int
+/*ARGSUSED*/
+_citrus_UTF1632_encoding_module_init(_UTF1632EncodingInfo * __restrict ei,
+ const void * __restrict var, size_t lenvar)
+{
+
+ memset((void *)ei, 0, sizeof(*ei));
+
+ parse_variable(ei, var, lenvar);
+
+ ei->cur_max = ((ei->mode&_MODE_UTF32) == 0) ? 6 : 8;
+ /* 6: endian + surrogate */
+ /* 8: endian + normal */
+
+ if (ei->preffered_endian == _ENDIAN_UNKNOWN) {
+ ei->preffered_endian = _ENDIAN_BIG;
+ }
+
+ return (0);
+}
+
+static void
+/*ARGSUSED*/
+_citrus_UTF1632_encoding_module_uninit(_UTF1632EncodingInfo *ei __unused)
+{
+
+}
+
+static __inline int
+/*ARGSUSED*/
+_citrus_UTF1632_stdenc_wctocs(_UTF1632EncodingInfo * __restrict ei __unused,
+ _csid_t * __restrict csid, _index_t * __restrict idx, _wc_t wc)
+{
+
+ *csid = 0;
+ *idx = (_index_t)wc;
+
+ return (0);
+}
+
+static __inline int
+/*ARGSUSED*/
+_citrus_UTF1632_stdenc_cstowc(_UTF1632EncodingInfo * __restrict ei __unused,
+ _wc_t * __restrict wc, _csid_t csid, _index_t idx)
+{
+
+ if (csid != 0)
+ return (EILSEQ);
+
+ *wc = (_wc_t)idx;
+
+ return (0);
+}
+
+static __inline int
+/*ARGSUSED*/
+_citrus_UTF1632_stdenc_get_state_desc_generic(_UTF1632EncodingInfo * __restrict ei __unused,
+ _UTF1632State * __restrict psenc, int * __restrict rstate)
+{
+
+ *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
+ _STDENC_SDGEN_INCOMPLETE_CHAR;
+ return (0);
+}
+
+/* ----------------------------------------------------------------------
+ * public interface for stdenc
+ */
+
+_CITRUS_STDENC_DECLS(UTF1632);
+_CITRUS_STDENC_DEF_OPS(UTF1632);
+
+#include "citrus_stdenc_template.h"
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