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-rw-r--r--lib/libiconv_modules/GBK2K/citrus_gbk2k.c417
1 files changed, 417 insertions, 0 deletions
diff --git a/lib/libiconv_modules/GBK2K/citrus_gbk2k.c b/lib/libiconv_modules/GBK2K/citrus_gbk2k.c
new file mode 100644
index 0000000..ff31725
--- /dev/null
+++ b/lib/libiconv_modules/GBK2K/citrus_gbk2k.c
@@ -0,0 +1,417 @@
+/* $FreeBSD$ */
+/* $NetBSD: citrus_gbk2k.c,v 1.7 2008/06/14 16:01:07 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/types.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdbool.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_bcs.h"
+#include "citrus_module.h"
+#include "citrus_stdenc.h"
+#include "citrus_gbk2k.h"
+
+
+/* ----------------------------------------------------------------------
+ * private stuffs used by templates
+ */
+
+typedef struct _GBK2KState {
+ int chlen;
+ char ch[4];
+} _GBK2KState;
+
+typedef struct {
+ int mb_cur_max;
+} _GBK2KEncodingInfo;
+
+#define _CEI_TO_EI(_cei_) (&(_cei_)->ei)
+#define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_
+
+#define _FUNCNAME(m) _citrus_GBK2K_##m
+#define _ENCODING_INFO _GBK2KEncodingInfo
+#define _ENCODING_STATE _GBK2KState
+#define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_cur_max
+#define _ENCODING_IS_STATE_DEPENDENT 0
+#define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0
+
+static __inline void
+/*ARGSUSED*/
+_citrus_GBK2K_init_state(_GBK2KEncodingInfo * __restrict ei __unused,
+ _GBK2KState * __restrict s)
+{
+
+ memset(s, 0, sizeof(*s));
+}
+
+static __inline void
+/*ARGSUSED*/
+_citrus_GBK2K_pack_state(_GBK2KEncodingInfo * __restrict ei __unused,
+ void * __restrict pspriv, const _GBK2KState * __restrict s)
+{
+
+ memcpy(pspriv, (const void *)s, sizeof(*s));
+}
+
+static __inline void
+/*ARGSUSED*/
+_citrus_GBK2K_unpack_state(_GBK2KEncodingInfo * __restrict ei __unused,
+ _GBK2KState * __restrict s, const void * __restrict pspriv)
+{
+
+ memcpy((void *)s, pspriv, sizeof(*s));
+}
+
+static __inline bool
+_mb_singlebyte(int c)
+{
+
+ return ((c & 0xff) <= 0x7f);
+}
+
+static __inline bool
+_mb_leadbyte(int c)
+{
+
+ c &= 0xff;
+ return (0x81 <= c && c <= 0xfe);
+}
+
+static __inline bool
+_mb_trailbyte(int c)
+{
+
+ c &= 0xff;
+ return ((0x40 <= c && c <= 0x7e) || (0x80 <= c && c <= 0xfe));
+}
+
+static __inline bool
+_mb_surrogate(int c)
+{
+
+ c &= 0xff;
+ return (0x30 <= c && c <= 0x39);
+}
+
+static __inline int
+_mb_count(wchar_t v)
+{
+ uint32_t c;
+
+ c = (uint32_t)v; /* XXX */
+ if (!(c & 0xffffff00))
+ return (1);
+ if (!(c & 0xffff0000))
+ return (2);
+ return (4);
+}
+
+#define _PSENC (psenc->ch[psenc->chlen - 1])
+#define _PUSH_PSENC(c) (psenc->ch[psenc->chlen++] = (c))
+
+static int
+_citrus_GBK2K_mbrtowc_priv(_GBK2KEncodingInfo * __restrict ei,
+ wchar_t * __restrict pwc, char ** __restrict s, size_t n,
+ _GBK2KState * __restrict psenc, size_t * __restrict nresult)
+{
+ char *s0, *s1;
+ wchar_t wc;
+ int chlenbak, len;
+
+ s0 = *s;
+
+ if (s0 == NULL) {
+ /* _citrus_GBK2K_init_state(ei, psenc); */
+ psenc->chlen = 0;
+ *nresult = 0;
+ return (0);
+ }
+
+ chlenbak = psenc->chlen;
+
+ switch (psenc->chlen) {
+ case 3:
+ if (!_mb_leadbyte (_PSENC))
+ goto invalid;
+ /* FALLTHROUGH */
+ case 2:
+ if (!_mb_surrogate(_PSENC) || _mb_trailbyte(_PSENC))
+ goto invalid;
+ /* FALLTHROUGH */
+ case 1:
+ if (!_mb_leadbyte (_PSENC))
+ goto invalid;
+ /* FALLTHOROUGH */
+ case 0:
+ break;
+ default:
+ goto invalid;
+ }
+
+ for (;;) {
+ if (n-- < 1)
+ goto restart;
+
+ _PUSH_PSENC(*s0++);
+
+ switch (psenc->chlen) {
+ case 1:
+ if (_mb_singlebyte(_PSENC))
+ goto convert;
+ if (_mb_leadbyte (_PSENC))
+ continue;
+ goto ilseq;
+ case 2:
+ if (_mb_trailbyte (_PSENC))
+ goto convert;
+ if (ei->mb_cur_max == 4 &&
+ _mb_surrogate (_PSENC))
+ continue;
+ goto ilseq;
+ case 3:
+ if (_mb_leadbyte (_PSENC))
+ continue;
+ goto ilseq;
+ case 4:
+ if (_mb_surrogate (_PSENC))
+ goto convert;
+ goto ilseq;
+ }
+ }
+
+convert:
+ len = psenc->chlen;
+ s1 = &psenc->ch[0];
+ wc = 0;
+ while (len-- > 0)
+ wc = (wc << 8) | (*s1++ & 0xff);
+
+ if (pwc != NULL)
+ *pwc = wc;
+ *s = s0;
+ *nresult = (wc == 0) ? 0 : psenc->chlen - chlenbak;
+ /* _citrus_GBK2K_init_state(ei, psenc); */
+ psenc->chlen = 0;
+
+ return (0);
+
+restart:
+ *s = s0;
+ *nresult = (size_t)-2;
+
+ return (0);
+
+invalid:
+ return (EINVAL);
+
+ilseq:
+ *nresult = (size_t)-1;
+ return (EILSEQ);
+}
+
+static int
+_citrus_GBK2K_wcrtomb_priv(_GBK2KEncodingInfo * __restrict ei,
+ char * __restrict s, size_t n, wchar_t wc, _GBK2KState * __restrict psenc,
+ size_t * __restrict nresult)
+{
+ size_t len;
+ int ret;
+
+ if (psenc->chlen != 0) {
+ ret = EINVAL;
+ goto err;
+ }
+
+ len = _mb_count(wc);
+ if (n < len) {
+ ret = E2BIG;
+ goto err;
+ }
+
+ switch (len) {
+ case 1:
+ if (!_mb_singlebyte(_PUSH_PSENC(wc ))) {
+ ret = EILSEQ;
+ goto err;
+ }
+ break;
+ case 2:
+ if (!_mb_leadbyte (_PUSH_PSENC(wc >> 8)) ||
+ !_mb_trailbyte (_PUSH_PSENC(wc))) {
+ ret = EILSEQ;
+ goto err;
+ }
+ break;
+ case 4:
+ if (ei->mb_cur_max != 4 ||
+ !_mb_leadbyte (_PUSH_PSENC(wc >> 24)) ||
+ !_mb_surrogate (_PUSH_PSENC(wc >> 16)) ||
+ !_mb_leadbyte (_PUSH_PSENC(wc >> 8)) ||
+ !_mb_surrogate (_PUSH_PSENC(wc))) {
+ ret = EILSEQ;
+ goto err;
+ }
+ break;
+ }
+
+ memcpy(s, psenc->ch, psenc->chlen);
+ *nresult = psenc->chlen;
+ /* _citrus_GBK2K_init_state(ei, psenc); */
+ psenc->chlen = 0;
+
+ return (0);
+
+err:
+ *nresult = (size_t)-1;
+ return (ret);
+}
+
+static __inline int
+/*ARGSUSED*/
+_citrus_GBK2K_stdenc_wctocs(_GBK2KEncodingInfo * __restrict ei __unused,
+ _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc)
+{
+ uint8_t ch, cl;
+
+ if ((uint32_t)wc < 0x80) {
+ /* ISO646 */
+ *csid = 0;
+ *idx = (_index_t)wc;
+ } else if ((uint32_t)wc >= 0x10000) {
+ /* GBKUCS : XXX */
+ *csid = 3;
+ *idx = (_index_t)wc;
+ } else {
+ ch = (uint8_t)(wc >> 8);
+ cl = (uint8_t)wc;
+ if (ch >= 0xA1 && cl >= 0xA1) {
+ /* EUC G1 */
+ *csid = 1;
+ *idx = (_index_t)wc & 0x7F7FU;
+ } else {
+ /* extended area (0x8140-) */
+ *csid = 2;
+ *idx = (_index_t)wc;
+ }
+ }
+
+ return (0);
+}
+
+static __inline int
+/*ARGSUSED*/
+_citrus_GBK2K_stdenc_cstowc(_GBK2KEncodingInfo * __restrict ei,
+ wchar_t * __restrict wc, _csid_t csid, _index_t idx)
+{
+
+ switch (csid) {
+ case 0:
+ /* ISO646 */
+ *wc = (wchar_t)idx;
+ break;
+ case 1:
+ /* EUC G1 */
+ *wc = (wchar_t)idx | 0x8080U;
+ break;
+ case 2:
+ /* extended area */
+ *wc = (wchar_t)idx;
+ break;
+ case 3:
+ /* GBKUCS : XXX */
+ if (ei->mb_cur_max != 4)
+ return (EINVAL);
+ *wc = (wchar_t)idx;
+ break;
+ default:
+ return (EILSEQ);
+ }
+
+ return (0);
+}
+
+static __inline int
+/*ARGSUSED*/
+_citrus_GBK2K_stdenc_get_state_desc_generic(_GBK2KEncodingInfo * __restrict ei __unused,
+ _GBK2KState * __restrict psenc, int * __restrict rstate)
+{
+
+ *rstate = (psenc->chlen == 0) ? _STDENC_SDGEN_INITIAL :
+ _STDENC_SDGEN_INCOMPLETE_CHAR;
+ return (0);
+}
+
+static int
+/*ARGSUSED*/
+_citrus_GBK2K_encoding_module_init(_GBK2KEncodingInfo * __restrict ei,
+ const void * __restrict var, size_t lenvar)
+{
+ const char *p;
+
+ p = var;
+ memset((void *)ei, 0, sizeof(*ei));
+ ei->mb_cur_max = 4;
+ while (lenvar > 0) {
+ switch (_bcs_tolower(*p)) {
+ case '2':
+ MATCH("2byte", ei->mb_cur_max = 2);
+ break;
+ }
+ p++;
+ lenvar--;
+ }
+
+ return (0);
+}
+
+static void
+/*ARGSUSED*/
+_citrus_GBK2K_encoding_module_uninit(_GBK2KEncodingInfo *ei __unused)
+{
+
+}
+
+/* ----------------------------------------------------------------------
+ * public interface for stdenc
+ */
+
+_CITRUS_STDENC_DECLS(GBK2K);
+_CITRUS_STDENC_DEF_OPS(GBK2K);
+
+#include "citrus_stdenc_template.h"
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