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Editing: citrus_viqr.c
/* $FreeBSD$ */ /* $NetBSD: citrus_viqr.c,v 1.5 2011/11/19 18:20:13 tnozaki Exp $ */ /*- * SPDX-License-Identifier: BSD-2-Clause * * Copyright (c)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_viqr.h" #define ESCAPE '\\' /* * this table generated from RFC 1456. */ static const char *mnemonic_rfc1456[0x100] = { NULL , NULL , "A(?", NULL , NULL , "A(~", "A^~", NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , "Y?" , NULL , NULL , NULL , NULL , "Y~" , NULL , NULL , NULL , NULL , "Y." , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , NULL , "A." , "A('", "A(`", "A(.", "A^'", "A^`", "A^?", "A^.", "E~" , "E." , "E^'", "E^`", "E^?", "E^~", "E^.", "O^'", "O^`", "O^?", "O^~", "O^.", "O+.", "O+'", "O+`", "O+?", "I." , "O?" , "O." , "I?" , "U?" , "U~" , "U." , "Y`" , "O~" , "a('", "a(`", "a(.", "a^'", "a^`", "a^?", "a^.", "e~" , "e." , "e^'", "e^`", "e^?", "e^~", "e^.", "o^'", "o^`", "o^?", "o^~", "O+~", "O+" , "o^.", "o+`", "o+?", "i." , "U+.", "U+'", "U+`", "U+?", "o+" , "o+'", "U+" , "A`" , "A'" , "A^" , "A~" , "A?" , "A(" , "a(?", "a(~", "E`" , "E'" , "E^" , "E?" , "I`" , "I'" , "I~" , "y`" , "DD" , "u+'", "O`" , "O'" , "O^" , "a." , "y?" , "u+`", "u+?", "U`" , "U'" , "y~" , "y." , "Y'" , "o+~", "u+" , "a`" , "a'" , "a^" , "a~" , "a?" , "a(" , "u+~", "a^~", "e`" , "e'" , "e^" , "e?" , "i`" , "i'" , "i~" , "i?" , "dd" , "u+.", "o`" , "o'" , "o^" , "o~" , "o?" , "o." , "u." , "u`" , "u'" , "u~" , "u?" , "y'" , "o+.", "U+~", }; typedef struct { const char *name; wchar_t value; } mnemonic_def_t; static const mnemonic_def_t mnemonic_ext[] = { /* add extra mnemonic here (should be sorted by wchar_t order). */ }; static const size_t mnemonic_ext_size = sizeof(mnemonic_ext) / sizeof(mnemonic_def_t); static const char * mnemonic_ext_find(wchar_t wc, const mnemonic_def_t *head, size_t n) { const mnemonic_def_t *mid; for (; n > 0; n >>= 1) { mid = head + (n >> 1); if (mid->value == wc) return (mid->name); else if (mid->value < wc) { head = mid + 1; --n; } } return (NULL); } struct mnemonic_t; typedef TAILQ_HEAD(mnemonic_list_t, mnemonic_t) mnemonic_list_t; typedef struct mnemonic_t { TAILQ_ENTRY(mnemonic_t) entry; struct mnemonic_t *parent; mnemonic_list_t child; wchar_t value; int ascii; } mnemonic_t; static mnemonic_t * mnemonic_list_find(mnemonic_list_t *ml, int ch) { mnemonic_t *m; TAILQ_FOREACH(m, ml, entry) { if (m->ascii == ch) return (m); } return (NULL); } static mnemonic_t * mnemonic_create(mnemonic_t *parent, int ascii, wchar_t value) { mnemonic_t *m; m = malloc(sizeof(*m)); if (m != NULL) { m->parent = parent; m->ascii = ascii; m->value = value; TAILQ_INIT(&m->child); } return (m); } static int mnemonic_append_child(mnemonic_t *m, const char *s, wchar_t value, wchar_t invalid) { mnemonic_t *m0; int ch; ch = (unsigned char)*s++; if (ch == '\0') return (EINVAL); m0 = mnemonic_list_find(&m->child, ch); if (m0 == NULL) { m0 = mnemonic_create(m, ch, (wchar_t)ch); if (m0 == NULL) return (ENOMEM); TAILQ_INSERT_TAIL(&m->child, m0, entry); } m = m0; for (m0 = NULL; (ch = (unsigned char)*s) != '\0'; ++s) { m0 = mnemonic_list_find(&m->child, ch); if (m0 == NULL) { m0 = mnemonic_create(m, ch, invalid); if (m0 == NULL) return (ENOMEM); TAILQ_INSERT_TAIL(&m->child, m0, entry); } m = m0; } if (m0 == NULL) return (EINVAL); m0->value = value; return (0); } static void mnemonic_destroy(mnemonic_t *m) { mnemonic_t *m0; TAILQ_FOREACH(m0, &m->child, entry) mnemonic_destroy(m0); free(m); } typedef struct { mnemonic_t *mroot; wchar_t invalid; size_t mb_cur_max; } _VIQREncodingInfo; typedef struct { int chlen; char ch[MB_LEN_MAX]; } _VIQRState; #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ #define _FUNCNAME(m) _citrus_VIQR_##m #define _ENCODING_INFO _VIQREncodingInfo #define _ENCODING_STATE _VIQRState #define _ENCODING_MB_CUR_MAX(_ei_) (_ei_)->mb_cur_max #define _ENCODING_IS_STATE_DEPENDENT 1 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) 0 static __inline void /*ARGSUSED*/ _citrus_VIQR_init_state(_VIQREncodingInfo * __restrict ei __unused, _VIQRState * __restrict psenc) { psenc->chlen = 0; } #if 0 static __inline void /*ARGSUSED*/ _citrus_VIQR_pack_state(_VIQREncodingInfo * __restrict ei __unused, void *__restrict pspriv, const _VIQRState * __restrict psenc) { memcpy(pspriv, (const void *)psenc, sizeof(*psenc)); } static __inline void /*ARGSUSED*/ _citrus_VIQR_unpack_state(_VIQREncodingInfo * __restrict ei __unused, _VIQRState * __restrict psenc, const void * __restrict pspriv) { memcpy((void *)psenc, pspriv, sizeof(*psenc)); } #endif static int _citrus_VIQR_mbrtowc_priv(_VIQREncodingInfo * __restrict ei, wchar_t * __restrict pwc, char ** __restrict s, size_t n, _VIQRState * __restrict psenc, size_t * __restrict nresult) { mnemonic_t *m, *m0; char *s0; wchar_t wc; ssize_t i; int ch, escape; if (*s == NULL) { _citrus_VIQR_init_state(ei, psenc); *nresult = (size_t)_ENCODING_IS_STATE_DEPENDENT; return (0); } s0 = *s; i = 0; m = ei->mroot; for (escape = 0;;) { if (psenc->chlen == i) { if (n-- < 1) { *s = s0; *nresult = (size_t)-2; return (0); } psenc->ch[psenc->chlen++] = *s0++; } ch = (unsigned char)psenc->ch[i++]; if (ch == ESCAPE) { if (m != ei->mroot) break; escape = 1; continue; } if (escape != 0) break; m0 = mnemonic_list_find(&m->child, ch); if (m0 == NULL) break; m = m0; } while (m != ei->mroot) { --i; if (m->value != ei->invalid) break; m = m->parent; } if (ch == ESCAPE && m != ei->mroot) ++i; psenc->chlen -= i; memmove(&psenc->ch[0], &psenc->ch[i], psenc->chlen); wc = (m == ei->mroot) ? (wchar_t)ch : m->value; if (pwc != NULL) *pwc = wc; *nresult = (size_t)(wc == 0 ? 0 : s0 - *s); *s = s0; return (0); } static int _citrus_VIQR_wcrtomb_priv(_VIQREncodingInfo * __restrict ei, char * __restrict s, size_t n, wchar_t wc, _VIQRState * __restrict psenc, size_t * __restrict nresult) { mnemonic_t *m; const char *p; int ch = 0; switch (psenc->chlen) { case 0: case 1: break; default: return (EINVAL); } m = NULL; if ((uint32_t)wc <= 0xFF) { p = mnemonic_rfc1456[wc & 0xFF]; if (p != NULL) goto mnemonic_found; if (n-- < 1) goto e2big; ch = (unsigned int)wc; m = ei->mroot; if (psenc->chlen > 0) { m = mnemonic_list_find(&m->child, psenc->ch[0]); if (m == NULL) return (EINVAL); psenc->ch[0] = ESCAPE; } if (mnemonic_list_find(&m->child, ch) == NULL) { psenc->chlen = 0; m = NULL; } psenc->ch[psenc->chlen++] = ch; } else { p = mnemonic_ext_find(wc, &mnemonic_ext[0], mnemonic_ext_size); if (p == NULL) { *nresult = (size_t)-1; return (EILSEQ); } else { mnemonic_found: psenc->chlen = 0; while (*p != '\0') { if (n-- < 1) goto e2big; psenc->ch[psenc->chlen++] = *p++; } } } memcpy(s, psenc->ch, psenc->chlen); *nresult = psenc->chlen; if (m == ei->mroot) { psenc->ch[0] = ch; psenc->chlen = 1; } else psenc->chlen = 0; return (0); e2big: *nresult = (size_t)-1; return (E2BIG); } static int /* ARGSUSED */ _citrus_VIQR_put_state_reset(_VIQREncodingInfo * __restrict ei __unused, char * __restrict s __unused, size_t n __unused, _VIQRState * __restrict psenc, size_t * __restrict nresult) { switch (psenc->chlen) { case 0: case 1: break; default: return (EINVAL); } *nresult = 0; psenc->chlen = 0; return (0); } static __inline int /*ARGSUSED*/ _citrus_VIQR_stdenc_wctocs(_VIQREncodingInfo * __restrict ei __unused, _csid_t * __restrict csid, _index_t * __restrict idx, wchar_t wc) { *csid = 0; *idx = (_index_t)wc; return (0); } static __inline int /*ARGSUSED*/ _citrus_VIQR_stdenc_cstowc(_VIQREncodingInfo * __restrict ei __unused, wchar_t * __restrict pwc, _csid_t csid, _index_t idx) { if (csid != 0) return (EILSEQ); *pwc = (wchar_t)idx; return (0); } static void _citrus_VIQR_encoding_module_uninit(_VIQREncodingInfo *ei) { mnemonic_destroy(ei->mroot); } static int /*ARGSUSED*/ _citrus_VIQR_encoding_module_init(_VIQREncodingInfo * __restrict ei, const void * __restrict var __unused, size_t lenvar __unused) { const char *s; size_t i, n; int errnum; ei->mb_cur_max = 1; ei->invalid = (wchar_t)-1; ei->mroot = mnemonic_create(NULL, '\0', ei->invalid); if (ei->mroot == NULL) return (ENOMEM); for (i = 0; i < sizeof(mnemonic_rfc1456) / sizeof(const char *); ++i) { s = mnemonic_rfc1456[i]; if (s == NULL) continue; n = strlen(s); if (ei->mb_cur_max < n) ei->mb_cur_max = n; errnum = mnemonic_append_child(ei->mroot, s, (wchar_t)i, ei->invalid); if (errnum != 0) { _citrus_VIQR_encoding_module_uninit(ei); return (errnum); } } /* a + 1 < b + 1 here to silence gcc warning about unsigned < 0. */ for (i = 0; i + 1 < mnemonic_ext_size + 1; ++i) { const mnemonic_def_t *p; p = &mnemonic_ext[i]; n = strlen(p->name); if (ei->mb_cur_max < n) ei->mb_cur_max = n; errnum = mnemonic_append_child(ei->mroot, p->name, p->value, ei->invalid); if (errnum != 0) { _citrus_VIQR_encoding_module_uninit(ei); return (errnum); } } return (0); } static __inline int /*ARGSUSED*/ _citrus_VIQR_stdenc_get_state_desc_generic(_VIQREncodingInfo * __restrict ei __unused, _VIQRState * __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(VIQR); _CITRUS_STDENC_DEF_OPS(VIQR); #include "citrus_stdenc_template.h"
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