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IABSD.fr/xenocara/app/xterm/charsets.c
matthieu
- app/xterm/charsets.c
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/* $XTermId: charsets.c,v 1.131 2026/04/07 22:23:12 tom Exp $ */ /* * Copyright 1998-2025,2026 by Thomas E. Dickey * * All Rights Reserved * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the * "Software"), to deal in the Software without restriction, including * without limitation the rights to use, copy, modify, merge, publish, * distribute, sublicense, and/or sell copies of the Software, and to * permit persons to whom the Software is furnished to do so, subject to * the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL THE ABOVE LISTED COPYRIGHT HOLDER(S) BE LIABLE FOR ANY * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name(s) of the above copyright * holders shall not be used in advertising or otherwise to promote the * sale, use or other dealings in this Software without prior written * authorization. * */ #include <assert.h> #include <X11/keysym.h> #include <xterm.h> #include <data.h> #include <charsets.h> #include <fontutils.h> /* * This module performs translation as needed to support the DEC VT220 national * replacement character sets as well as supplementary character sets (aka * code-pages) introduced in VT320, etc. * * We assume that xterm's font is based on the ISO 8859-1 (Latin 1) character * set, which is almost the same as the DEC multinational character set. Glyph * positions 0-31 have to be the DEC graphic characters, though. * * References: * "VT220 Programmer Pocket Guide" EK-VT220-HR-002 (2nd ed., 1984), which * contains character charts for the national character sets. * "VT330/VT340 Programmer Reference Manual Volume 1: Text Programming" * EK-VT3XX-TP-001 (1st ed, 1987), which contains a table (2-1) * listing the glyphs which are mapped from the multinational * character set to the national character set. * * The latter reference, though easier to read, has a few errors and omissions. */ #define HandleUPSS(charset) \ if (charset == nrc_DEC_UPSS) { \ charset = screen->gsets_upss; \ if (screen->vtXX_level >= 5) { \ /* EMPTY */ ; \ } else if (screen->vtXX_level >= 3) { \ if (charset != nrc_DEC_Supp) \ charset = nrc_ISO_Latin_1_Supp; \ } else if (screen->vtXX_level < 2) { \ charset = nrc_ASCII; \ } \ } static Boolean isSevenBit(DECNRCM_codes cs) { Boolean result = False; switch (cs) { case nrc_ISO_Greek_Supp: case nrc_ISO_Hebrew_Supp: case nrc_ISO_Latin_1_Supp: case nrc_ISO_Latin_2_Supp: case nrc_ISO_Latin_5_Supp: case nrc_ISO_Latin_Cyrillic: case nrc_DEC_UPSS: break; /* VT100 character sets */ case nrc_ASCII: case nrc_British: case nrc_DEC_Alt_Chars: case nrc_DEC_Spec_Graphic: /* VT220 character sets */ case nrc_DEC_Alt_Graphics: case nrc_DEC_Supp: /* VT320 character sets */ case nrc_DEC_Supp_Graphic: case nrc_DEC_Technical: /* NRCS character sets (VT320 to VT520) */ case nrc_British_Latin_1: case nrc_Dutch: case nrc_Finnish2: case nrc_Finnish: case nrc_French2: case nrc_French: case nrc_French_Canadian2: case nrc_French_Canadian: case nrc_German: case nrc_Greek: case nrc_Hebrew: case nrc_Italian: case nrc_JIS_Katakana: case nrc_JIS_Roman: case nrc_Norwegian_Danish2: case nrc_Norwegian_Danish3: case nrc_Norwegian_Danish: case nrc_Portugese: case nrc_Russian: case nrc_SCS_NRCS: case nrc_Spanish: case nrc_Swedish2: case nrc_Swedish: case nrc_Swiss: case nrc_Turkish: /* other DEC character sets */ case nrc_DEC_Cyrillic: case nrc_DEC_Greek_Supp: case nrc_DEC_Hebrew_Supp: case nrc_DEC_Turkish_Supp: result = True; break; case nrc_Unknown: break; } return result; } /* * Translate an input keysym to the corresponding NRC keysym. */ unsigned xtermCharSetIn(XtermWidget xw, unsigned code, DECNRCM_codes charset) { TScreen *screen = TScreenOf(xw); #define MAP(to, from) case from: code = to; break; #if OPT_WIDE_CHARS #define UNI(to, from) case from: if (screen->utf8_nrc_mode) code = to; break; #else #define UNI(to, from) case from: break; #endif #define XXX(to, from) /* no defined mapping to 0..255 */ TRACE(("CHARSET-IN GL=%s(G%d) GR=%s(G%d) SS%d\n\t%s\n", visibleScsCode(screen->gsets[screen->curgl]), screen->curgl, visibleScsCode(screen->gsets[screen->curgr]), screen->curgr, screen->curss, visibleUChar(code))); HandleUPSS(charset); switch (charset) { case nrc_British: /* United Kingdom set (or Latin 1) */ if (code == XK_sterling) code = 0x23; code &= 0x7f; break; case nrc_DEC_Alt_Chars: case nrc_DEC_Alt_Graphics: case nrc_ASCII: break; case nrc_DEC_Spec_Graphic: break; case nrc_DEC_Supp: map_DEC_Supp_Graphic(code, code &= 0x7f); break; case nrc_DEC_Supp_Graphic: map_DEC_Supp_Graphic(code, code |= 0x80); break; case nrc_DEC_Technical: map_DEC_Technical(code); break; case nrc_Dutch: map_NRCS_Dutch(code); break; case nrc_Finnish: case nrc_Finnish2: map_NRCS_Finnish(code); break; case nrc_French: case nrc_French2: map_NRCS_French(code); break; case nrc_French_Canadian: map_NRCS_French_Canadian(code); break; case nrc_German: map_NRCS_German(code); break; case nrc_Greek: map_NRCS_Greek(code); /* FIXME - ELOT? */ break; case nrc_DEC_Greek_Supp: map_DEC_Greek_Supp(code); break; case nrc_ISO_Greek_Supp: map_ISO_Greek_Supp(code); break; case nrc_DEC_Hebrew_Supp: map_DEC_Hebrew_Supp(code); break; case nrc_Hebrew: map_NRCS_Hebrew(code); break; case nrc_ISO_Hebrew_Supp: map_ISO_Hebrew(code); break; case nrc_Italian: map_NRCS_Italian(code); break; case nrc_ISO_Latin_2_Supp: map_ISO_Latin_2(code); break; case nrc_ISO_Latin_5_Supp: map_ISO_Latin_5(code); break; case nrc_ISO_Latin_Cyrillic: map_ISO_Latin_Cyrillic(code); break; case nrc_JIS_Katakana: map_JIS_Katakana(code); break; case nrc_JIS_Roman: map_JIS_Roman(code); break; case nrc_Norwegian_Danish: case nrc_Norwegian_Danish2: case nrc_Norwegian_Danish3: map_NRCS_Norwegian_Danish(code); break; case nrc_Portugese: map_NRCS_Portuguese(code); break; case nrc_Russian: map_NRCS_Russian(code); break; case nrc_SCS_NRCS: /* vt5xx - Serbo/Croatian */ map_NRCS_Serbo_Croatian(code); break; case nrc_Spanish: map_NRCS_Spanish(code); break; case nrc_Swedish2: case nrc_Swedish: map_NRCS_Swedish(code); break; case nrc_Swiss: map_NRCS_Swiss(code); break; case nrc_Turkish: map_NRCS_Turkish(code); break; case nrc_DEC_Turkish_Supp: map_DEC_Turkish_Supp(code); break; case nrc_DEC_Cyrillic: map_DEC_Cyrillic(code); break; case nrc_ISO_Latin_1_Supp: case nrc_British_Latin_1: case nrc_French_Canadian2: case nrc_Unknown: case nrc_DEC_UPSS: default: /* any character sets we don't recognize */ break; } code &= 0x7f; /* NRC in any case is 7-bit */ TRACE(("->\t%s\n", visibleUChar(code))); return code; #undef MAP #undef UNI #undef XXX } /* * Translate a string to the display form. This assumes the font has the * DEC graphic characters in cells 0-31, and otherwise is ISO-8859-1. */ Cardinal xtermCharSetOut(XtermWidget xw, Cardinal length, DECNRCM_codes leftset) { IChar *buf = xw->work.write_text; const IChar *ptr = buf + length; IChar *s; TScreen *screen = TScreenOf(xw); Cardinal count = 0; DECNRCM_codes rightset = screen->gsets[(int) (screen->curgr)]; #if OPT_DEC_RECTOPS int sums = 0; #endif #define MAP(from, to) case from: chr = to; break; #if OPT_WIDE_CHARS #define UNI(from, to) case from: if (screen->utf8_nrc_mode) chr = to; break; #define XXX(from, to) UNI(from, to) #else #define UNI(old, new) case new: chr = old; break; #define XXX(from, to) /* nothing */ #endif TRACE(("CHARSET-OUT GL=%s(G%d) GR=%s(G%d) SS%d\n\t%s\n", visibleScsCode(leftset), screen->curgl, visibleScsCode(rightset), screen->curgr, screen->curss, visibleIChars(buf, (size_t) length))); assert(length != 0); #if OPT_DEC_RECTOPS if (length != 0 && length > xw->work.sizeof_sums) { xw->work.sizeof_sums += length + 80; xw->work.buffer_sums = realloc(xw->work.buffer_sums, xw->work.sizeof_sums); xw->work.buffer_sets = realloc(xw->work.buffer_sets, xw->work.sizeof_sums); } xw->work.write_sums = xw->work.buffer_sums; #endif for (s = buf; s < ptr; ++s) { int eight = CharOf(*s); int seven = eight & 0x7f; DECNRCM_codes cs = (eight >= 128) ? rightset : leftset; int chr = eight; HandleUPSS(cs); #if OPT_DEC_RECTOPS if (xw->work.buffer_sums != NULL && xw->work.buffer_sets != NULL) { xw->work.buffer_sums[sums] = (Char) ((eight < 32 || eight > 255) ? ANSI_ESC : eight); xw->work.buffer_sets[sums] = cs; ++sums; } #endif count++; #if OPT_WIDE_CHARS /* * This is only partly right - prevent inadvertent remapping of * the replacement character and other non-8bit codes into bogus * 8bit codes. */ if (screen->utf8_mode || screen->utf8_nrc_mode) { if (*s > 255) continue; } #endif if (*s < 32) continue; switch (cs) { case nrc_DEC_UPSS: break; case nrc_ISO_Latin_1_Supp: case nrc_British_Latin_1: case nrc_British: /* United Kingdom set (or Latin 1) */ if ((xw->flags & NATIONAL) || (screen->vtXX_level <= 1)) { if ((xw->flags & NATIONAL)) { chr = seven; } if (chr == 0x23) { chr = XTERM_POUND; #if OPT_WIDE_CHARS if (screen->utf8_nrc_mode) { chr = 0xa3; } #endif } } break; case nrc_DEC_Alt_Chars: case nrc_DEC_Alt_Graphics: case nrc_ASCII: break; case nrc_DEC_Spec_Graphic: if (seven > 0x5f && seven <= 0x7e) { #if OPT_WIDE_CHARS if (screen->utf8_mode || screen->utf8_nrc_mode) chr = (int) dec2ucs(screen, (unsigned) (seven - 0x5f)); else #endif chr = seven - 0x5f; } else if (chr == 0x5f) { chr = 0; } else { chr = seven; } break; case nrc_DEC_Supp: case nrc_DEC_Supp_Graphic: map_DEC_Supp_Graphic(chr = seven, chr = eight); break; case nrc_DEC_Technical: map_DEC_Technical(chr = seven); break; case nrc_Dutch: map_NRCS_Dutch(chr = seven); break; case nrc_Finnish: case nrc_Finnish2: map_NRCS_Finnish(chr = seven); break; case nrc_French: case nrc_French2: map_NRCS_French(chr = seven); break; case nrc_French_Canadian: case nrc_French_Canadian2: map_NRCS_French_Canadian(chr = seven); break; case nrc_German: map_NRCS_German(chr = seven); break; case nrc_Greek: map_NRCS_Greek(chr = seven); /* FIXME - ELOT? */ break; case nrc_DEC_Greek_Supp: map_DEC_Greek_Supp(chr = seven); break; case nrc_ISO_Greek_Supp: map_ISO_Greek_Supp(chr = seven); break; case nrc_DEC_Hebrew_Supp: map_DEC_Hebrew_Supp(chr = seven); break; case nrc_Hebrew: map_NRCS_Hebrew(chr = seven); break; case nrc_ISO_Hebrew_Supp: map_ISO_Hebrew(chr = seven); break; case nrc_Italian: map_NRCS_Italian(chr = seven); break; case nrc_ISO_Latin_2_Supp: map_ISO_Latin_2(chr = seven); break; case nrc_ISO_Latin_5_Supp: map_ISO_Latin_5(chr = seven); break; case nrc_ISO_Latin_Cyrillic: map_ISO_Latin_Cyrillic(chr = seven); break; case nrc_JIS_Katakana: map_JIS_Katakana(chr = seven); break; case nrc_JIS_Roman: map_JIS_Roman(chr = seven); break; case nrc_Norwegian_Danish: case nrc_Norwegian_Danish2: case nrc_Norwegian_Danish3: map_NRCS_Norwegian_Danish(chr = seven); break; case nrc_Portugese: map_NRCS_Portuguese(chr = seven); break; case nrc_Russian: map_NRCS_Russian(chr = seven); break; case nrc_SCS_NRCS: /* vt5xx - Serbo/Croatian */ map_NRCS_Serbo_Croatian(chr = seven); break; case nrc_Spanish: map_NRCS_Spanish(chr = seven); break; case nrc_Swedish2: case nrc_Swedish: map_NRCS_Swedish(chr = seven); break; case nrc_Swiss: map_NRCS_Swiss(chr = seven); break; case nrc_Turkish: map_NRCS_Turkish(chr = seven); break; case nrc_DEC_Turkish_Supp: map_DEC_Turkish_Supp(chr = seven); break; case nrc_DEC_Cyrillic: map_DEC_Cyrillic(chr = seven); break; case nrc_Unknown: default: /* any character sets we don't recognize */ break; } /* * The state machine already treated DEL as a nonprinting and * nonspacing character. If we have DEL now, remove it. */ if (chr == ANSI_DEL && isSevenBit(cs)) { IChar *s1; --ptr; for (s1 = s; s1 < ptr; ++s1) { s1[0] = s1[1]; } --count; #if OPT_DEC_RECTOPS --sums; #endif } else { if (eight >= 128 && chr < 128 && chr > 32) chr |= 128; *s = (IChar) chr; } } TRACE(("%d\t%s\n", count, visibleIChars(buf, (size_t) length))); return count; #undef MAP #undef UNI #undef XXX } #if OPT_DEC_RECTOPS /* * Given a mapped character, e.g., a Unicode value returned by xtermCharSetIn, * match it against the current GL/GR selection and return the corresponding * DEC internal character-set code for DECRQCRA. * * A hardware terminal presumably stores the original and mapped characters, * as well as the character set which was selected at that time Doing that * in xterm adds a couple of bytes to every cell. */ int xtermCharSetDec(XtermWidget xw, IChar chr, DECNRCM_codes cs) { #define MAP(from, to) case from: result = to; break; #define DFTMAP() result = (actual | 0x80) #define DFT_94(chr) result = ((actual) & 0x7f) #define DFT_96(chr) result = ((actual) | 0x80) #if OPT_WIDE_CHARS #define UNI(from, to) case from: if (screen->utf8_nrc_mode) result = to; break; #define XXX(from, to) UNI(from, to) #else #define UNI(old, new) case new: result = old; break; #define XXX(from, to) /* nothing */ #endif int result; if (chr < 0x20 #if OPT_WIDE_CHARS || chr > 0xff #endif ) { result = ANSI_ESC; } else { Boolean isSeven = isSevenBit(cs); TScreen *screen = TScreenOf(xw); result = -1; HandleUPSS(cs); if (chr == 0xa0 && isSeven) { result = ANSI_ESC; } else if (chr == ANSI_SPA && isSeven) { result = ANSI_SPA; } else if ((chr == ANSI_DEL || chr == 0xff) && isSeven) { result = 0; } else { int actual = (int) chr; chr &= 0x7f; switch (cs) { case nrc_DEC_Alt_Chars: case nrc_DEC_Alt_Graphics: case nrc_ASCII: result = (int) chr; break; case nrc_British: if (chr == 0x23) chr = XK_sterling; result = (int) chr; break; case nrc_DEC_Cyrillic: unmap_DEC_Cyrillic(chr, DFT_94(chr)); break; case nrc_DEC_Spec_Graphic: unmap_DEC_Spec_Graphic(chr, DFT_94(chr)); break; case nrc_DEC_Supp: /* FALLTHRU */ case nrc_DEC_Supp_Graphic: unmap_DEC_Supp_Graphic(chr, DFTMAP()); break; case nrc_DEC_Technical: unmap_DEC_Technical(chr, DFTMAP()); break; case nrc_Dutch: unmap_NRCS_Dutch(chr, DFT_94(chr)); break; case nrc_Finnish: case nrc_Finnish2: unmap_NRCS_Finnish(chr, DFT_94(chr)); break; case nrc_French: case nrc_French2: unmap_NRCS_French(chr, DFT_94(chr)); break; case nrc_French_Canadian: case nrc_French_Canadian2: unmap_NRCS_French_Canadian(chr, DFT_94(chr)); break; case nrc_German: unmap_NRCS_German(chr, DFT_94(chr)); break; case nrc_Greek: unmap_NRCS_Greek(chr, DFT_94(chr)); break; case nrc_DEC_Greek_Supp: unmap_DEC_Greek_Supp(chr, DFTMAP()); break; case nrc_ISO_Greek_Supp: unmap_ISO_Greek_Supp(chr, DFTMAP()); break; case nrc_DEC_Hebrew_Supp: unmap_DEC_Hebrew_Supp(chr, DFTMAP()); break; case nrc_Hebrew: unmap_NRCS_Hebrew(chr, DFT_94(chr)); break; case nrc_ISO_Hebrew_Supp: unmap_ISO_Hebrew(chr, DFTMAP()); break; case nrc_Italian: unmap_NRCS_Italian(chr, DFT_94(chr)); break; case nrc_JIS_Katakana: unmap_JIS_Katakana(chr, DFT_94(chr)); break; case nrc_JIS_Roman: unmap_JIS_Roman(chr, DFT_94(chr)); break; case nrc_ISO_Latin_1_Supp: unmap_ISO_Latin_1(chr, DFTMAP()); break; case nrc_ISO_Latin_2_Supp: unmap_ISO_Latin_2(chr, DFTMAP()); break; case nrc_ISO_Latin_5_Supp: unmap_ISO_Latin_5(chr, DFTMAP()); break; case nrc_ISO_Latin_Cyrillic: unmap_ISO_Latin_Cyrillic(chr, DFTMAP()); break; case nrc_Norwegian_Danish: case nrc_Norwegian_Danish2: case nrc_Norwegian_Danish3: unmap_NRCS_Norwegian_Danish(chr, DFT_94(chr)); break; case nrc_Portugese: unmap_NRCS_Portuguese(chr, DFT_94(chr)); break; case nrc_Russian: unmap_NRCS_Russian(chr, DFT_94(chr)); break; case nrc_SCS_NRCS: unmap_NRCS_Serbo_Croatian(chr, DFT_94(chr)); break; case nrc_Spanish: unmap_NRCS_Spanish(chr, DFT_94(chr)); break; case nrc_Swedish: case nrc_Swedish2: unmap_NRCS_Swedish(chr, DFT_94(chr)); break; case nrc_Swiss: unmap_NRCS_Swiss(chr, DFT_94(chr)); break; case nrc_DEC_Turkish_Supp: unmap_DEC_Turkish_Supp(chr, DFTMAP()); break; case nrc_Turkish: unmap_NRCS_Turkish(chr, DFT_94(chr)); break; case nrc_British_Latin_1: case nrc_Unknown: case nrc_DEC_UPSS: default: /* anything we cannot unmap */ break; } if (result < 0) { if (isSeven) { DFT_94(chr); } else { DFT_96(chr); } } } } return result; #undef MAP #undef UNI #undef XXX } #endif /* OPT_DEC_RECTOPS */