/*- * Copyright (c)1999, 2002 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 "dcmtk/config/osconfig.h" #include "citrus_iso2022.h" #ifdef HAVE_SYS_TYPES_H #include #endif #include #include #include #include #include #include #include #include #include "citrus_bcs.h" #include "citrus_types.h" #include "citrus_module.h" #include "citrus_stdenc.h" /* ---------------------------------------------------------------------- * private stuffs used by templates */ /* * _citrus_wc_t mappings: * ASCII (ESC ( B) 00000000 00000000 00000000 0xxxxxxx * iso-8859-1 (ESC , A) 00000000 00000000 00000000 1xxxxxxx * 94 charset (ESC ( F) 0fffffff 00000000 00000000 0xxxxxxx * 94 charset (ESC ( M F) 0fffffff 1mmmmmmm 00000000 0xxxxxxx * 96 charset (ESC , F) 0fffffff 00000000 00000000 1xxxxxxx * 96 charset (ESC , M F) 0fffffff 1mmmmmmm 00000000 1xxxxxxx * 94x94 charset (ESC $ ( F) 0fffffff 00000000 0xxxxxxx 0xxxxxxx * 96x96 charset (ESC $ , F) 0fffffff 00000000 0xxxxxxx 1xxxxxxx * 94x94 charset (ESC & V ESC $ ( F) * 0fffffff 1vvvvvvv 0xxxxxxx 0xxxxxxx * 94x94x94 charset (ESC $ ( F) 0fffffff 0xxxxxxx 0xxxxxxx 0xxxxxxx * 96x96x96 charset (ESC $ , F) 0fffffff 0xxxxxxx 0xxxxxxx 1xxxxxxx * reserved for UCS4 co-existence (UCS4 is 31bit encoding thanks to mohta bit) * 1xxxxxxx xxxxxxxx xxxxxxxx xxxxxxxx */ #define CS94 (0U) #define CS96 (1U) #define CS94MULTI (2U) #define CS96MULTI (3U) typedef struct { unsigned char interm; unsigned char final; unsigned char type; unsigned char vers; } _ISO2022Charset; static const _ISO2022Charset ascii = { CS94, 'B', '\0', '\0' }; static const _ISO2022Charset iso88591 = { CS96, 'A', '\0', '\0' }; typedef struct { _ISO2022Charset g[4]; /* need 3 bits to hold -1, 0, ..., 3 */ int gl:3, gr:3, singlegl:3, singlegr:3; char ch[7]; /* longest escape sequence (ESC & V ESC $ ( F) */ size_t chlen; int flags; #define _ISO2022STATE_FLAG_INITIALIZED 1 } _ISO2022State; typedef struct { _ISO2022Charset *recommend[4]; size_t recommendsize[4]; _ISO2022Charset initg[4]; int maxcharset; int flags; #define F_8BIT 0x0001 #define F_NOOLD 0x0002 #define F_SI 0x0010 /*0F*/ #define F_SO 0x0020 /*0E*/ #define F_LS0 0x0010 /*0F*/ #define F_LS1 0x0020 /*0E*/ #define F_LS2 0x0040 /*ESC n*/ #define F_LS3 0x0080 /*ESC o*/ #define F_LS1R 0x0100 /*ESC ~*/ #define F_LS2R 0x0200 /*ESC }*/ #define F_LS3R 0x0400 /*ESC |*/ #define F_SS2 0x0800 /*ESC N*/ #define F_SS3 0x1000 /*ESC O*/ #define F_SS2R 0x2000 /*8E*/ #define F_SS3R 0x4000 /*8F*/ } _ISO2022EncodingInfo; #define _CEI_TO_EI(_cei_) (&(_cei_)->ei) #define _CEI_TO_STATE(_cei_, _func_) (_cei_)->states.s_##_func_ #define _FUNCNAME(m) _citrus_ISO2022_##m #define _ENCODING_INFO _ISO2022EncodingInfo #define _ENCODING_STATE _ISO2022State #define _ENCODING_MB_CUR_MAX(_ei_) MB_LEN_MAX #define _ENCODING_IS_STATE_DEPENDENT 1 #define _STATE_NEEDS_EXPLICIT_INIT(_ps_) \ (!((_ps_)->flags & _ISO2022STATE_FLAG_INITIALIZED)) #define _ISO2022INVALID (_citrus_wc_t)-1 static __inline bool isc0(uint8_t x) { return ((x & 0x1f) == x); } static __inline bool isc1(uint8_t x) { return (0x80 <= x && x <= 0x9f); } static __inline bool iscntl(uint8_t x) { return (isc0(x) || isc1(x) || x == 0x7f); } static __inline bool is94(uint8_t x) { return (0x21 <= x && x <= 0x7e); } static __inline bool is96(uint8_t x) { return (0x20 <= x && x <= 0x7f); } static __inline bool isecma(uint8_t x) { return (0x30 <= x && x <= 0x7f); } static __inline bool isinterm(uint8_t x) { return (0x20 <= x && x <= 0x2f); } static __inline bool isthree(uint8_t x) { return (0x60 <= x && x <= 0x6f); } static __inline int getcs(const char * p, _ISO2022Charset * cs) { if (!strncmp(p, "94$", 3) && p[3] && !p[4]) { cs->final = (unsigned char)(p[3] & 0xff); cs->interm = '\0'; cs->vers = '\0'; cs->type = CS94MULTI; } else if (!strncmp(p, "96$", 3) && p[3] && !p[4]) { cs->final = (unsigned char)(p[3] & 0xff); cs->interm = '\0'; cs->vers = '\0'; cs->type = CS96MULTI; } else if (!strncmp(p, "94", 2) && p[2] && !p[3]) { cs->final = (unsigned char)(p[2] & 0xff); cs->interm = '\0'; cs->vers = '\0'; cs->type = CS94; } else if (!strncmp(p, "96", 2) && p[2] && !p[3]) { cs->final = (unsigned char )(p[2] & 0xff); cs->interm = '\0'; cs->vers = '\0'; cs->type = CS96; } else return (1); return (0); } #define _NOTMATCH 0 #define _MATCH 1 #define _PARSEFAIL 2 static __inline int get_recommend(_ISO2022EncodingInfo * ei, const char * token) { _ISO2022Charset cs, *p; int i; if (!strchr("0123", token[0]) || token[1] != '=') return (_NOTMATCH); if (getcs(&token[2], &cs) == 0) ; else if (!strcmp(&token[2], "94")) { cs.final = (unsigned char)(token[4]); cs.interm = '\0'; cs.vers = '\0'; cs.type = CS94; } else if (!strcmp(&token[2], "96")) { cs.final = (unsigned char)(token[4]); cs.interm = '\0'; cs.vers = '\0'; cs.type = CS96; } else if (!strcmp(&token[2], "94$")) { cs.final = (unsigned char)(token[5]); cs.interm = '\0'; cs.vers = '\0'; cs.type = CS94MULTI; } else if (!strcmp(&token[2], "96$")) { cs.final = (unsigned char)(token[5]); cs.interm = '\0'; cs.vers = '\0'; cs.type = CS96MULTI; } else return (_PARSEFAIL); i = token[0] - '0'; if (!ei->recommend[i]) ei->recommend[i] = malloc(sizeof(_ISO2022Charset)); else { p = realloc(ei->recommend[i], (ei->recommendsize[i] + 1) * sizeof(_ISO2022Charset)); if (!p) return (_PARSEFAIL); ei->recommend[i] = p; } if (!ei->recommend[i]) return (_PARSEFAIL); ei->recommendsize[i]++; (ei->recommend[i] + (ei->recommendsize[i] - 1))->final = cs.final; (ei->recommend[i] + (ei->recommendsize[i] - 1))->interm = cs.interm; (ei->recommend[i] + (ei->recommendsize[i] - 1))->vers = cs.vers; (ei->recommend[i] + (ei->recommendsize[i] - 1))->type = cs.type; return (_MATCH); } static __inline int get_initg(_ISO2022EncodingInfo * ei, const char * token) { _ISO2022Charset cs; if (strncmp("INIT", &token[0], 4) || !strchr("0123", token[4]) || token[5] != '=') return (_NOTMATCH); if (getcs(&token[6], &cs) != 0) return (_PARSEFAIL); /* suppress spurious GCC warnings */ #if ( defined(__GNUC__) && (__GNUC__ >= 10) ) #pragma GCC diagnostic push #pragma GCC diagnostic ignored "-Wstringop-overflow" #endif ei->initg[token[4] - '0'].type = cs.type; ei->initg[token[4] - '0'].final = cs.final; ei->initg[token[4] - '0'].interm = cs.interm; ei->initg[token[4] - '0'].vers = cs.vers; #if ( defined(__GNUC__) && (__GNUC__ >= 10) ) #pragma GCC diagnostic pop #endif return (_MATCH); } static __inline int get_max(_ISO2022EncodingInfo * ei, const char * token) { if (!strcmp(token, "MAX1")) ei->maxcharset = 1; else if (!strcmp(token, "MAX2")) ei->maxcharset = 2; else if (!strcmp(token, "MAX3")) ei->maxcharset = 3; else return (_NOTMATCH); return (_MATCH); } static __inline int get_flags(_ISO2022EncodingInfo * ei, const char * token) { static struct { const char *tag; int flag; } const tags[] = { { "DUMMY", 0 }, { "8BIT", F_8BIT }, { "NOOLD", F_NOOLD }, { "SI", F_SI }, { "SO", F_SO }, { "LS0", F_LS0 }, { "LS1", F_LS1 }, { "LS2", F_LS2 }, { "LS3", F_LS3 }, { "LS1R", F_LS1R }, { "LS2R", F_LS2R }, { "LS3R", F_LS3R }, { "SS2", F_SS2 }, { "SS3", F_SS3 }, { "SS2R", F_SS2R }, { "SS3R", F_SS3R }, { NULL, 0 } }; int i; for (i = 0; tags[i].tag; i++) if (!strcmp(token, tags[i].tag)) { ei->flags |= tags[i].flag; return (_MATCH); } return (_NOTMATCH); } static __inline int _citrus_ISO2022_parse_variable(_ISO2022EncodingInfo * ei, const void * var, size_t lenvar ) { char const *e, *v; char buf[20]; size_t len; int i, ret; (void) lenvar; /* * parse VARIABLE section. */ if (!var) return (EFTYPE); v = (const char *) var; /* initialize structure */ ei->maxcharset = 0; for (i = 0; i < 4; i++) { ei->recommend[i] = NULL; ei->recommendsize[i] = 0; } ei->flags = 0; while (*v) { while (*v == ' ' || *v == '\t') ++v; /* find the token */ e = v; while (*e && *e != ' ' && *e != '\t') ++e; len = e - v; if (len == 0) break; if (len >= sizeof(buf)) goto parsefail; snprintf(buf, sizeof(buf), "%.*s", (int)len, v); if ((ret = get_recommend(ei, buf)) != _NOTMATCH) ; else if ((ret = get_initg(ei, buf)) != _NOTMATCH) ; else if ((ret = get_max(ei, buf)) != _NOTMATCH) ; else if ((ret = get_flags(ei, buf)) != _NOTMATCH) ; else ret = _PARSEFAIL; if (ret == _PARSEFAIL) goto parsefail; v = e; } return (0); parsefail: free(ei->recommend[0]); free(ei->recommend[1]); free(ei->recommend[2]); free(ei->recommend[3]); return (EFTYPE); } static __inline void /*ARGSUSED*/ _citrus_ISO2022_init_state(_ISO2022EncodingInfo * ei, _ISO2022State * s) { int i; memset(s, 0, sizeof(*s)); s->gl = 0; s->gr = (ei->flags & F_8BIT) ? 1 : -1; for (i = 0; i < 4; i++) if (ei->initg[i].final) { s->g[i].type = ei->initg[i].type; s->g[i].final = ei->initg[i].final; s->g[i].interm = ei->initg[i].interm; } s->singlegl = s->singlegr = -1; s->flags |= _ISO2022STATE_FLAG_INITIALIZED; } static int /*ARGSUSED*/ _citrus_ISO2022_encoding_module_init(_ISO2022EncodingInfo * ei, const void * var, size_t lenvar) { return (_citrus_ISO2022_parse_variable(ei, var, lenvar)); } static void /*ARGSUSED*/ _citrus_ISO2022_encoding_module_uninit(_ISO2022EncodingInfo *ei ) { (void) ei; } #define ESC '\033' #define ECMA -1 #define INTERM -2 #define OECMA -3 static const struct seqtable { int type; int csoff; int finaloff; int intermoff; int versoff; int len; int chars[10]; } seqtable[] = { /* G0 94MULTI special */ { CS94MULTI, -1, 2, -1, -1, 3, { ESC, '$', OECMA }, }, /* G0 94MULTI special with version identification */ { CS94MULTI, -1, 5, -1, 2, 6, { ESC, '&', ECMA, ESC, '$', OECMA }, }, /* G? 94 */ { CS94, 1, 2, -1, -1, 3, { ESC, CS94, ECMA, }, }, /* G? 94 with 2nd intermediate char */ { CS94, 1, 3, 2, -1, 4, { ESC, CS94, INTERM, ECMA, }, }, /* G? 96 */ { CS96, 1, 2, -1, -1, 3, { ESC, CS96, ECMA, }, }, /* G? 96 with 2nd intermediate char */ { CS96, 1, 3, 2, -1, 4, { ESC, CS96, INTERM, ECMA, }, }, /* G? 94MULTI */ { CS94MULTI, 2, 3, -1, -1, 4, { ESC, '$', CS94, ECMA, }, }, /* G? 96MULTI */ { CS96MULTI, 2, 3, -1, -1, 4, { ESC, '$', CS96, ECMA, }, }, /* G? 94MULTI with version specification */ { CS94MULTI, 5, 6, -1, 2, 7, { ESC, '&', ECMA, ESC, '$', CS94, ECMA, }, }, /* LS2/3 */ { -1, -1, -1, -1, -1, 2, { ESC, 'n', }, }, { -1, -1, -1, -1, -1, 2, { ESC, 'o', }, }, /* LS1/2/3R */ { -1, -1, -1, -1, -1, 2, { ESC, '~', }, }, { -1, -1, -1, -1, -1, 2, { ESC, /*{*/ '}', }, }, { -1, -1, -1, -1, -1, 2, { ESC, '|', }, }, /* SS2/3 */ { -1, -1, -1, -1, -1, 2, { ESC, 'N', }, }, { -1, -1, -1, -1, -1, 2, { ESC, 'O', }, }, /* end of records */ /* { 0, } */ { 0, 0, 0, 0, 0, 0, { ESC, 0, }, } }; static int seqmatch(const char * s, size_t n, const struct seqtable * sp) { const int *p; p = sp->chars; while ((size_t)(p - sp->chars) < n && p - sp->chars < sp->len) { switch (*p) { case ECMA: if (!isecma(*s)) goto terminate; break; case OECMA: if (*s && strchr("@AB", *s)) break; else goto terminate; case INTERM: if (!isinterm(*s)) goto terminate; break; case CS94: if (*s && strchr("()*+", *s)) break; else goto terminate; case CS96: if (*s && strchr(",-./", *s)) break; else goto terminate; default: if (*s != *p) goto terminate; break; } p++; s++; } terminate: return (int) (p - sp->chars); } static _citrus_wc_t _ISO2022_sgetwchar(_ISO2022EncodingInfo * ei , char * string, size_t n, char ** result, _ISO2022State * psenc) { const struct seqtable *sp; _citrus_wc_t wchar = 0; int i, cur, nmatch; (void) ei; while (1) { /* SI/SO */ if (1 <= n && string[0] == '\017') { psenc->gl = 0; string++; n--; continue; } if (1 <= n && string[0] == '\016') { psenc->gl = 1; string++; n--; continue; } /* SS2/3R */ if (1 <= n && string[0] && strchr("\217\216", string[0])) { psenc->singlegl = psenc->singlegr = (string[0] - '\216') + 2; string++; n--; continue; } /* eat the letter if this is not ESC */ if (1 <= n && string[0] != '\033') break; /* look for a perfect match from escape sequences */ for (sp = &seqtable[0]; sp->len; sp++) { nmatch = seqmatch(string, n, sp); if (sp->len == nmatch && n >= (size_t)(sp->len)) break; } if (!sp->len) goto notseq; if (sp->type != -1) { if (sp->csoff == -1) i = 0; else { switch (sp->type) { case CS94: case CS94MULTI: i = string[sp->csoff] - '('; break; case CS96: case CS96MULTI: i = string[sp->csoff] - ','; break; default: return (_ISO2022INVALID); } } psenc->g[i].type = (unsigned char) sp->type; psenc->g[i].final = '\0'; psenc->g[i].interm = '\0'; psenc->g[i].vers = '\0'; /* sp->finaloff must not be -1 */ if (sp->finaloff != -1) psenc->g[i].final = string[sp->finaloff]; if (sp->intermoff != -1) psenc->g[i].interm = string[sp->intermoff]; if (sp->versoff != -1) psenc->g[i].vers = string[sp->versoff]; string += sp->len; n -= sp->len; continue; } /* LS2/3 */ if (2 <= n && string[0] == '\033' && string[1] && strchr("no", string[1])) { psenc->gl = string[1] - 'n' + 2; string += 2; n -= 2; continue; } /* LS1/2/3R */ /* XXX: { for vi showmatch */ if (2 <= n && string[0] == '\033' && string[1] && strchr("~}|", string[1])) { psenc->gr = 3 - (string[1] - '|'); string += 2; n -= 2; continue; } /* SS2/3 */ if (2 <= n && string[0] == '\033' && string[1] && strchr("NO", string[1])) { psenc->singlegl = (string[1] - 'N') + 2; string += 2; n -= 2; continue; } notseq: /* * if we've got an unknown escape sequence, eat the ESC at the * head. otherwise, wait till full escape sequence comes. */ for (sp = &seqtable[0]; sp->len; sp++) { nmatch = seqmatch(string, n, sp); if (!nmatch) continue; /* * if we are in the middle of escape sequence, * we still need to wait for more characters to come */ if (n < (size_t)(sp->len)) { if ((size_t)(nmatch) == n) { if (result) *result = string; return (_ISO2022INVALID); } } else { if (nmatch == sp->len) { /* this case should not happen */ goto eat; } } } break; } eat: /* no letter to eat */ if (n < 1) { if (result) *result = string; return (_ISO2022INVALID); } /* normal chars. always eat C0/C1 as is. */ if (iscntl(*string & 0xff)) cur = -1; else if (*string & 0x80) cur = (psenc->singlegr == -1) ? psenc->gr : psenc->singlegr; else cur = (psenc->singlegl == -1) ? psenc->gl : psenc->singlegl; if (cur == -1) { asis: wchar = *string++ & 0xff; if (result) *result = string; /* reset single shift state */ psenc->singlegr = psenc->singlegl = -1; return (wchar); } /* length error check */ switch (psenc->g[cur].type) { case CS94MULTI: case CS96MULTI: if (!isthree(psenc->g[cur].final)) { if (2 <= n && (string[0] & 0x80) == (string[1] & 0x80)) break; } else { if (3 <= n && (string[0] & 0x80) == (string[1] & 0x80) && (string[0] & 0x80) == (string[2] & 0x80)) break; } /* we still need to wait for more characters to come */ if (result) *result = string; return (_ISO2022INVALID); case CS94: case CS96: if (1 <= n) break; /* we still need to wait for more characters to come */ if (result) *result = string; return (_ISO2022INVALID); } /* range check */ switch (psenc->g[cur].type) { case CS94: if (!(is94(string[0] & 0x7f))) goto asis; break; case CS96: if (!(is96(string[0] & 0x7f))) goto asis; break; case CS94MULTI: if (!(is94(string[0] & 0x7f) && is94(string[1] & 0x7f))) goto asis; break; case CS96MULTI: if (!(is96(string[0] & 0x7f) && is96(string[1] & 0x7f))) goto asis; break; } /* extract the character. */ switch (psenc->g[cur].type) { case CS94: /* special case for ASCII. */ if (psenc->g[cur].final == 'B' && !psenc->g[cur].interm) { wchar = *string++; wchar &= 0x7f; break; } wchar = psenc->g[cur].final; wchar = (wchar << 8); wchar |= (psenc->g[cur].interm ? (0x80 | psenc->g[cur].interm) : 0); wchar = (wchar << 8); wchar = (wchar << 8) | (*string++ & 0x7f); break; case CS96: /* special case for ISO-8859-1. */ if (psenc->g[cur].final == 'A' && !psenc->g[cur].interm) { wchar = *string++; wchar &= 0x7f; wchar |= 0x80; break; } wchar = psenc->g[cur].final; wchar = (wchar << 8); wchar |= (psenc->g[cur].interm ? (0x80 | psenc->g[cur].interm) : 0); wchar = (wchar << 8); wchar = (wchar << 8) | (*string++ & 0x7f); wchar |= 0x80; break; case CS94MULTI: case CS96MULTI: wchar = psenc->g[cur].final; wchar = (wchar << 8); if (isthree(psenc->g[cur].final)) wchar |= (*string++ & 0x7f); wchar = (wchar << 8) | (*string++ & 0x7f); wchar = (wchar << 8) | (*string++ & 0x7f); if (psenc->g[cur].type == CS96MULTI) wchar |= 0x80; break; } if (result) *result = string; /* reset single shift state */ psenc->singlegr = psenc->singlegl = -1; return (wchar); } static int _citrus_ISO2022_mbrtowc_priv(_ISO2022EncodingInfo * ei, _citrus_wc_t * pwc, char ** s, size_t n, _ISO2022State * psenc, size_t * nresult) { char *p, *result, *s0; _citrus_wc_t wchar; int chlenbak; size_t c; if (*s == NULL) { _citrus_ISO2022_init_state(ei, psenc); *nresult = _ENCODING_IS_STATE_DEPENDENT; return (0); } s0 = *s; c = 0; chlenbak = (int) psenc->chlen; /* * if we have something in buffer, use that. * otherwise, skip here */ if (psenc->chlen > sizeof(psenc->ch)) { /* illgeal state */ _citrus_ISO2022_init_state(ei, psenc); goto encoding_error; } if (psenc->chlen == 0) goto emptybuf; /* buffer is not empty */ p = psenc->ch; while (psenc->chlen < sizeof(psenc->ch)) { if (n > 0) { psenc->ch[psenc->chlen++] = *s0++; n--; } wchar = _ISO2022_sgetwchar(ei, p, psenc->chlen - (p-psenc->ch), &result, psenc); c += result - p; if (wchar != _ISO2022INVALID) { if (psenc->chlen > (size_t)c) memmove(psenc->ch, result, psenc->chlen - c); if (psenc->chlen < (size_t)c) psenc->chlen = 0; else psenc->chlen -= c; goto output; } if (n == 0) { if ((size_t)(result - p) == psenc->chlen) /* complete shift sequence. */ psenc->chlen = 0; goto restart; } p = result; } /* escape sequence too long? */ goto encoding_error; emptybuf: wchar = _ISO2022_sgetwchar(ei, s0, n, &result, psenc); if (wchar != _ISO2022INVALID) { c += result - s0; psenc->chlen = 0; s0 = result; goto output; } if (result > s0) { c += (result - s0); n -= (result - s0); s0 = result; if (n > 0) goto emptybuf; /* complete shift sequence. */ goto restart; } n += c; if (n < sizeof(psenc->ch)) { memcpy(psenc->ch, s0 - c, n); psenc->chlen = n; s0 = result; goto restart; } /* escape sequence too long? */ encoding_error: psenc->chlen = 0; *nresult = (size_t)-1; return (EILSEQ); output: *s = s0; if (pwc) *pwc = wchar; *nresult = wchar ? c - chlenbak : 0; return (0); restart: *s = s0; *nresult = (size_t)-2; return (0); } static int recommendation(_ISO2022EncodingInfo * ei, _ISO2022Charset * cs) { _ISO2022Charset *recommend; size_t j; int i; /* first, try a exact match. */ for (i = 0; i < 4; i++) { recommend = ei->recommend[i]; for (j = 0; j < ei->recommendsize[i]; j++) { if (cs->type != recommend[j].type) continue; if (cs->final != recommend[j].final) continue; if (cs->interm != recommend[j].interm) continue; return (i); } } /* then, try a wildcard match over final char. */ for (i = 0; i < 4; i++) { recommend = ei->recommend[i]; for (j = 0; j < ei->recommendsize[i]; j++) { if (cs->type != recommend[j].type) continue; if (cs->final && (cs->final != recommend[j].final)) continue; if (cs->interm && (cs->interm != recommend[j].interm)) continue; return (i); } } /* there's no recommendation. make a guess. */ if (ei->maxcharset == 0) { return (0); } else { switch (cs->type) { case CS94: case CS94MULTI: return (0); case CS96: case CS96MULTI: return (1); } } return (0); } static int _ISO2022_sputwchar(_ISO2022EncodingInfo * ei, _citrus_wc_t wc, char * string, size_t n, char ** result, _ISO2022State * psenc, size_t * nresult) { _ISO2022Charset cs; char *p; char tmp[MB_LEN_MAX]; size_t len; int bit8, i = 0, target; unsigned char mask; if (isc0(wc & 0xff)) { /* go back to INIT0 or ASCII on control chars */ cs = ei->initg[0].final ? ei->initg[0] : ascii; } else if (isc1(wc & 0xff)) { /* go back to INIT1 or ISO-8859-1 on control chars */ cs = ei->initg[1].final ? ei->initg[1] : iso88591; } else if (!(wc & ~0xff)) { if (wc & 0x80) { /* special treatment for ISO-8859-1 */ cs = iso88591; } else { /* special treatment for ASCII */ cs = ascii; } } else { cs.final = (wc >> 24) & 0x7f; if ((wc >> 16) & 0x80) cs.interm = (wc >> 16) & 0x7f; else cs.interm = '\0'; if (wc & 0x80) cs.type = (wc & 0x00007f00) ? CS96MULTI : CS96; else cs.type = (wc & 0x00007f00) ? CS94MULTI : CS94; } target = recommendation(ei, &cs); p = tmp; bit8 = ei->flags & F_8BIT; /* designate the charset onto the target plane(G0/1/2/3). */ if (psenc->g[target].type == cs.type && psenc->g[target].final == cs.final && psenc->g[target].interm == cs.interm) goto planeok; *p++ = '\033'; if (cs.type == CS94MULTI || cs.type == CS96MULTI) *p++ = '$'; if (target == 0 && cs.type == CS94MULTI && strchr("@AB", cs.final) && !cs.interm && !(ei->flags & F_NOOLD)) ; else if (cs.type == CS94 || cs.type == CS94MULTI) *p++ = "()*+"[target]; else *p++ = ",-./"[target]; if (cs.interm) *p++ = cs.interm; *p++ = cs.final; psenc->g[target].type = cs.type; psenc->g[target].final = cs.final; psenc->g[target].interm = cs.interm; planeok: /* invoke the plane onto GL or GR. */ if (psenc->gl == target) goto sideok; if (bit8 && psenc->gr == target) goto sideok; if (target == 0 && (ei->flags & F_LS0)) { *p++ = '\017'; psenc->gl = 0; } else if (target == 1 && (ei->flags & F_LS1)) { *p++ = '\016'; psenc->gl = 1; } else if (target == 2 && (ei->flags & F_LS2)) { *p++ = '\033'; *p++ = 'n'; psenc->gl = 2; } else if (target == 3 && (ei->flags & F_LS3)) { *p++ = '\033'; *p++ = 'o'; psenc->gl = 3; } else if (bit8 && target == 1 && (ei->flags & F_LS1R)) { *p++ = '\033'; *p++ = '~'; psenc->gr = 1; } else if (bit8 && target == 2 && (ei->flags & F_LS2R)) { *p++ = '\033'; /*{*/ *p++ = '}'; psenc->gr = 2; } else if (bit8 && target == 3 && (ei->flags & F_LS3R)) { *p++ = '\033'; *p++ = '|'; psenc->gr = 3; } else if (target == 2 && (ei->flags & F_SS2)) { *p++ = '\033'; *p++ = 'N'; psenc->singlegl = 2; } else if (target == 3 && (ei->flags & F_SS3)) { *p++ = '\033'; *p++ = 'O'; psenc->singlegl = 3; } else if (bit8 && target == 2 && (ei->flags & F_SS2R)) { *p++ = '\216'; *p++ = 'N'; psenc->singlegl = psenc->singlegr = 2; } else if (bit8 && target == 3 && (ei->flags & F_SS3R)) { *p++ = '\217'; *p++ = 'O'; psenc->singlegl = psenc->singlegr = 3; } else goto ilseq; sideok: if (psenc->singlegl == target) mask = 0x00; else if (psenc->singlegr == target) mask = 0x80; else if (psenc->gl == target) mask = 0x00; else if ((ei->flags & F_8BIT) && psenc->gr == target) mask = 0x80; else goto ilseq; switch (cs.type) { case CS94: case CS96: i = 1; break; case CS94MULTI: case CS96MULTI: i = !iscntl(wc & 0xff) ? (isthree(cs.final) ? 3 : 2) : 1; break; } while (i-- > 0) *p++ = ((wc >> (i << 3)) & 0x7f) | mask; /* reset single shift state */ psenc->singlegl = psenc->singlegr = -1; len = (size_t)(p - tmp); if (n < len) { if (result) *result = (char *)0; *nresult = (size_t)-1; return (E2BIG); } if (result) *result = string + len; memcpy(string, tmp, len); *nresult = len; return (0); ilseq: *nresult = (size_t)-1; return (EILSEQ); } static int _citrus_ISO2022_put_state_reset(_ISO2022EncodingInfo * ei, char * s, size_t n, _ISO2022State * psenc, size_t * nresult) { char *result; char buf[MB_LEN_MAX]; size_t len; int ret; /* XXX state will be modified after this operation... */ ret = _ISO2022_sputwchar(ei, L'\0', buf, sizeof(buf), &result, psenc, &len); if (ret) { *nresult = len; return (ret); } if (sizeof(buf) < len || n < len-1) { /* XXX should recover state? */ *nresult = (size_t)-1; return (E2BIG); } memcpy(s, buf, len - 1); *nresult = len - 1; return (0); } static int _citrus_ISO2022_wcrtomb_priv(_ISO2022EncodingInfo * ei, char * s, size_t n, _citrus_wc_t wc, _ISO2022State * psenc, size_t * nresult) { char *result; char buf[MB_LEN_MAX]; size_t len; int ret; /* XXX state will be modified after this operation... */ ret = _ISO2022_sputwchar(ei, wc, buf, sizeof(buf), &result, psenc, &len); if (ret) { *nresult = len; return (ret); } if (sizeof(buf) < len || n < len) { /* XXX should recover state? */ *nresult = (size_t)-1; return (E2BIG); } memcpy(s, buf, len); *nresult = len; return (0); } static __inline int /*ARGSUSED*/ _citrus_ISO2022_stdenc_wctocs(_ISO2022EncodingInfo * ei , _citrus_csid_t * csid, _citrus_index_t * idx, _citrus_wc_t wc) { _citrus_wc_t m, nm; (void) ei; m = wc & 0x7FFF8080; nm = wc & 0x007F7F7F; if (m & 0x00800000) nm &= 0x00007F7F; else m &= 0x7F008080; if (nm & 0x007F0000) { /* ^3 mark */ m |= 0x007F0000; } else if (nm & 0x00007F00) { /* ^2 mark */ m |= 0x00007F00; } *csid = (_citrus_csid_t)m; *idx = (_citrus_index_t)nm; return (0); } static __inline int /*ARGSUSED*/ _citrus_ISO2022_stdenc_cstowc(_ISO2022EncodingInfo * ei , _citrus_wc_t * wc, _citrus_csid_t csid, _citrus_index_t idx) { (void) ei; *wc = (_citrus_wc_t)(csid & 0x7F808080) | (_citrus_wc_t)idx; return (0); } static __inline int /*ARGSUSED*/ _citrus_ISO2022_stdenc_get_state_desc_generic(_ISO2022EncodingInfo * ei , _ISO2022State * psenc, int * rstate) { (void) ei; if (psenc->chlen == 0) { /* XXX: it should distinguish initial and stable. */ *rstate = _CITRUS_STDENC_SDGEN_STABLE; } else *rstate = (psenc->ch[0] == '\033') ? _CITRUS_STDENC_SDGEN_INCOMPLETE_SHIFT : _CITRUS_STDENC_SDGEN_INCOMPLETE_CHAR; return (0); } /* ---------------------------------------------------------------------- * public interface for stdenc */ _CITRUS_STDENC_DECLS(ISO2022); _CITRUS_STDENC_DEF_OPS(ISO2022); #include "citrus_stdenc_template.h"