1*84680f53Sschwarze /* $OpenBSD: term_ascii.c,v 1.55 2023/11/13 19:13:00 schwarze Exp $ */
2f95d589eSschwarze /*
3a5e11edeSschwarze * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
430c2fcb2Sschwarze * Copyright (c) 2014,2015,2017,2018,2020 Ingo Schwarze <schwarze@openbsd.org>
5f95d589eSschwarze *
6f95d589eSschwarze * Permission to use, copy, modify, and distribute this software for any
7f95d589eSschwarze * purpose with or without fee is hereby granted, provided that the above
8f95d589eSschwarze * copyright notice and this permission notice appear in all copies.
9f95d589eSschwarze *
102ccd0917Sschwarze * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
11f95d589eSschwarze * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
122ccd0917Sschwarze * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
13f95d589eSschwarze * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14f95d589eSschwarze * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15f95d589eSschwarze * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16f95d589eSschwarze * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17f95d589eSschwarze */
18f95d589eSschwarze #include <sys/types.h>
19f95d589eSschwarze
206899db98Sschwarze #include <assert.h>
21414b1fadSschwarze #include <langinfo.h>
22a5e11edeSschwarze #include <locale.h>
23f95d589eSschwarze #include <stdint.h>
24f95d589eSschwarze #include <stdio.h>
25f95d589eSschwarze #include <stdlib.h>
26414b1fadSschwarze #include <string.h>
27f95d589eSschwarze #include <unistd.h>
28a5e11edeSschwarze #include <wchar.h>
29f95d589eSschwarze
302791bd1cSschwarze #include "mandoc.h"
314f4f7972Sschwarze #include "mandoc_aux.h"
32f95d589eSschwarze #include "out.h"
33f95d589eSschwarze #include "term.h"
342ccd0917Sschwarze #include "manconf.h"
35f95d589eSschwarze #include "main.h"
36f95d589eSschwarze
37ecf32ec4Sschwarze #define UTF8_LOCALE "en_US.UTF-8"
38ecf32ec4Sschwarze
3916536faaSschwarze static struct termp *ascii_init(enum termenc, const struct manoutput *);
4013a35416Sschwarze static int ascii_hspan(const struct termp *,
41769ee804Sschwarze const struct roffsu *);
42a5e11edeSschwarze static size_t ascii_width(const struct termp *, int);
43769ee804Sschwarze static void ascii_advance(struct termp *, size_t);
44769ee804Sschwarze static void ascii_begin(struct termp *);
45769ee804Sschwarze static void ascii_end(struct termp *);
46f95d589eSschwarze static void ascii_endline(struct termp *);
47a5e11edeSschwarze static void ascii_letter(struct termp *, int);
4813a35416Sschwarze static void ascii_setwidth(struct termp *, int, int);
49f95d589eSschwarze
50a5e11edeSschwarze static void locale_advance(struct termp *, size_t);
51a5e11edeSschwarze static void locale_endline(struct termp *);
52a5e11edeSschwarze static void locale_letter(struct termp *, int);
53a5e11edeSschwarze static size_t locale_width(const struct termp *, int);
54f95d589eSschwarze
5549aff9f8Sschwarze
56a5e11edeSschwarze static struct termp *
ascii_init(enum termenc enc,const struct manoutput * outopts)5716536faaSschwarze ascii_init(enum termenc enc, const struct manoutput *outopts)
58f95d589eSschwarze {
59f95d589eSschwarze char *v;
60a5e11edeSschwarze struct termp *p;
61f95d589eSschwarze
62e93ea447Sschwarze p = mandoc_calloc(1, sizeof(*p));
63e93ea447Sschwarze p->tcol = p->tcols = mandoc_calloc(1, sizeof(*p->tcol));
64e93ea447Sschwarze p->maxtcol = 1;
65f95d589eSschwarze
66c0a657b3Sschwarze p->line = 1;
67*84680f53Sschwarze p->defindent = 5;
685281506aSschwarze p->defrmargin = p->lastrmargin = 78;
69c48a0735Sschwarze p->fontq = mandoc_reallocarray(NULL,
70e93ea447Sschwarze (p->fontsz = 8), sizeof(*p->fontq));
71c48a0735Sschwarze p->fontq[0] = p->fontl = TERMFONT_NONE;
723ebeb861Sschwarze
73f95d589eSschwarze p->begin = ascii_begin;
74f95d589eSschwarze p->end = ascii_end;
75769ee804Sschwarze p->hspan = ascii_hspan;
76769ee804Sschwarze p->type = TERMTYPE_CHAR;
77a5e11edeSschwarze
78a5e11edeSschwarze p->enc = TERMENC_ASCII;
79a5e11edeSschwarze p->advance = ascii_advance;
80a5e11edeSschwarze p->endline = ascii_endline;
81a5e11edeSschwarze p->letter = ascii_letter;
825281506aSschwarze p->setwidth = ascii_setwidth;
833ebeb861Sschwarze p->width = ascii_width;
84f95d589eSschwarze
8553d61c88Sschwarze if (enc != TERMENC_ASCII) {
868621bbcaSschwarze
878621bbcaSschwarze /*
888621bbcaSschwarze * Do not change any of this to LC_ALL. It might break
898621bbcaSschwarze * the formatting by subtly changing the behaviour of
908621bbcaSschwarze * various functions, for example strftime(3). As a
918621bbcaSschwarze * worst case, it might even cause buffer overflows.
928621bbcaSschwarze */
938621bbcaSschwarze
9453d61c88Sschwarze v = enc == TERMENC_LOCALE ?
958621bbcaSschwarze setlocale(LC_CTYPE, "") :
96ecf32ec4Sschwarze setlocale(LC_CTYPE, UTF8_LOCALE);
97414b1fadSschwarze
98414b1fadSschwarze /*
99414b1fadSschwarze * We only support UTF-8,
100414b1fadSschwarze * so revert to ASCII for anything else.
101414b1fadSschwarze */
102414b1fadSschwarze
103414b1fadSschwarze if (v != NULL &&
104414b1fadSschwarze strcmp(nl_langinfo(CODESET), "UTF-8") != 0)
105414b1fadSschwarze v = setlocale(LC_CTYPE, "C");
106414b1fadSschwarze
107414b1fadSschwarze if (v != NULL && MB_CUR_MAX > 1) {
10853d61c88Sschwarze p->enc = TERMENC_UTF8;
109a5e11edeSschwarze p->advance = locale_advance;
110a5e11edeSschwarze p->endline = locale_endline;
111a5e11edeSschwarze p->letter = locale_letter;
112a5e11edeSschwarze p->width = locale_width;
113a5e11edeSschwarze }
114a5e11edeSschwarze }
115a5e11edeSschwarze
116*84680f53Sschwarze if (outopts->mdoc)
117b6695f6fSschwarze p->mdocstyle = 1;
1182ccd0917Sschwarze if (outopts->indent)
1192ccd0917Sschwarze p->defindent = outopts->indent;
1202ccd0917Sschwarze if (outopts->width)
1212ccd0917Sschwarze p->defrmargin = outopts->width;
1222ccd0917Sschwarze if (outopts->synopsisonly)
1232ccd0917Sschwarze p->synopsisonly = 1;
124f95d589eSschwarze
125fe245e6aSschwarze assert(p->defindent < UINT16_MAX);
126fe245e6aSschwarze assert(p->defrmargin < UINT16_MAX);
127526e306bSschwarze return p;
128f95d589eSschwarze }
129f95d589eSschwarze
130a5e11edeSschwarze void *
ascii_alloc(const struct manoutput * outopts)13116536faaSschwarze ascii_alloc(const struct manoutput *outopts)
132a5e11edeSschwarze {
133a5e11edeSschwarze
13416536faaSschwarze return ascii_init(TERMENC_ASCII, outopts);
135a5e11edeSschwarze }
136a5e11edeSschwarze
137a5e11edeSschwarze void *
utf8_alloc(const struct manoutput * outopts)13816536faaSschwarze utf8_alloc(const struct manoutput *outopts)
139a5e11edeSschwarze {
140a5e11edeSschwarze
14116536faaSschwarze return ascii_init(TERMENC_UTF8, outopts);
142a5e11edeSschwarze }
143a5e11edeSschwarze
144a5e11edeSschwarze void *
locale_alloc(const struct manoutput * outopts)14516536faaSschwarze locale_alloc(const struct manoutput *outopts)
146a5e11edeSschwarze {
147a5e11edeSschwarze
14816536faaSschwarze return ascii_init(TERMENC_LOCALE, outopts);
149a5e11edeSschwarze }
150f95d589eSschwarze
1515281506aSschwarze static void
ascii_setwidth(struct termp * p,int iop,int width)15213a35416Sschwarze ascii_setwidth(struct termp *p, int iop, int width)
1535281506aSschwarze {
1545281506aSschwarze
15513a35416Sschwarze width /= 24;
156e93ea447Sschwarze p->tcol->rmargin = p->defrmargin;
15799b0a561Sschwarze if (iop > 0)
15810111bf6Sschwarze p->defrmargin += width;
15999b0a561Sschwarze else if (iop == 0)
16013a35416Sschwarze p->defrmargin = width ? (size_t)width : p->lastrmargin;
16113a35416Sschwarze else if (p->defrmargin > (size_t)width)
16210111bf6Sschwarze p->defrmargin -= width;
16310111bf6Sschwarze else
16499b0a561Sschwarze p->defrmargin = 0;
165fe245e6aSschwarze if (p->defrmargin > 1000)
166fe245e6aSschwarze p->defrmargin = 1000;
167e93ea447Sschwarze p->lastrmargin = p->tcol->rmargin;
168e93ea447Sschwarze p->tcol->rmargin = p->maxrmargin = p->defrmargin;
1695281506aSschwarze }
1705281506aSschwarze
1712b036407Sschwarze void
terminal_sepline(void * arg)1722db2cb23Sschwarze terminal_sepline(void *arg)
1732b036407Sschwarze {
1742b036407Sschwarze struct termp *p;
1752b036407Sschwarze size_t i;
1762b036407Sschwarze
1772b036407Sschwarze p = (struct termp *)arg;
1782db2cb23Sschwarze (*p->endline)(p);
1792b036407Sschwarze for (i = 0; i < p->defrmargin; i++)
1802db2cb23Sschwarze (*p->letter)(p, '-');
1812db2cb23Sschwarze (*p->endline)(p);
1822db2cb23Sschwarze (*p->endline)(p);
1832b036407Sschwarze }
1842b036407Sschwarze
1853ebeb861Sschwarze static size_t
ascii_width(const struct termp * p,int c)186a5e11edeSschwarze ascii_width(const struct termp *p, int c)
1873ebeb861Sschwarze {
18818bbf166Sschwarze return c != ASCII_BREAK && c != ASCII_NBRZW && c != ASCII_TABREF;
1893ebeb861Sschwarze }
1903ebeb861Sschwarze
191f95d589eSschwarze void
ascii_free(void * arg)192f95d589eSschwarze ascii_free(void *arg)
193f95d589eSschwarze {
194f95d589eSschwarze
195f95d589eSschwarze term_free((struct termp *)arg);
196f95d589eSschwarze }
197f95d589eSschwarze
198f95d589eSschwarze static void
ascii_letter(struct termp * p,int c)199a5e11edeSschwarze ascii_letter(struct termp *p, int c)
200f95d589eSschwarze {
201f95d589eSschwarze
202f95d589eSschwarze putchar(c);
203f95d589eSschwarze }
204f95d589eSschwarze
205f95d589eSschwarze static void
ascii_begin(struct termp * p)206f95d589eSschwarze ascii_begin(struct termp *p)
207f95d589eSschwarze {
208f95d589eSschwarze
209f95d589eSschwarze (*p->headf)(p, p->argf);
210f95d589eSschwarze }
211f95d589eSschwarze
212f95d589eSschwarze static void
ascii_end(struct termp * p)213f95d589eSschwarze ascii_end(struct termp *p)
214f95d589eSschwarze {
215f95d589eSschwarze
216f95d589eSschwarze (*p->footf)(p, p->argf);
217f95d589eSschwarze }
218f95d589eSschwarze
219f95d589eSschwarze static void
ascii_endline(struct termp * p)220f95d589eSschwarze ascii_endline(struct termp *p)
221f95d589eSschwarze {
222f95d589eSschwarze
223c0a657b3Sschwarze p->line++;
22430c2fcb2Sschwarze if ((int)p->tcol->offset > p->ti)
225e93ea447Sschwarze p->tcol->offset -= p->ti;
22630c2fcb2Sschwarze else
22730c2fcb2Sschwarze p->tcol->offset = 0;
22811d70615Sschwarze p->ti = 0;
229f95d589eSschwarze putchar('\n');
230f95d589eSschwarze }
231f95d589eSschwarze
232f95d589eSschwarze static void
ascii_advance(struct termp * p,size_t len)233f95d589eSschwarze ascii_advance(struct termp *p, size_t len)
234f95d589eSschwarze {
235f95d589eSschwarze size_t i;
236f95d589eSschwarze
237b19a7d95Sschwarze /*
238b19a7d95Sschwarze * XXX We used to have "assert(len < UINT16_MAX)" here.
239b19a7d95Sschwarze * that is not quite right because the input document
240b19a7d95Sschwarze * can trigger that by merely providing large input.
241b19a7d95Sschwarze * For now, simply truncate.
242b19a7d95Sschwarze */
243b19a7d95Sschwarze if (len > 256)
244b19a7d95Sschwarze len = 256;
245f95d589eSschwarze for (i = 0; i < len; i++)
246f95d589eSschwarze putchar(' ');
247f95d589eSschwarze }
248769ee804Sschwarze
24913a35416Sschwarze static int
ascii_hspan(const struct termp * p,const struct roffsu * su)250769ee804Sschwarze ascii_hspan(const struct termp *p, const struct roffsu *su)
251769ee804Sschwarze {
252769ee804Sschwarze double r;
253769ee804Sschwarze
254769ee804Sschwarze switch (su->unit) {
255d5dc6f2eSschwarze case SCALE_BU:
25613a35416Sschwarze r = su->scale;
257d5dc6f2eSschwarze break;
25849aff9f8Sschwarze case SCALE_CM:
25913a35416Sschwarze r = su->scale * 240.0 / 2.54;
260d5dc6f2eSschwarze break;
261d5dc6f2eSschwarze case SCALE_FS:
26213a35416Sschwarze r = su->scale * 65536.0;
263769ee804Sschwarze break;
26449aff9f8Sschwarze case SCALE_IN:
26513a35416Sschwarze r = su->scale * 240.0;
266769ee804Sschwarze break;
267d5dc6f2eSschwarze case SCALE_MM:
26813a35416Sschwarze r = su->scale * 0.24;
269769ee804Sschwarze break;
27049aff9f8Sschwarze case SCALE_VS:
27113a35416Sschwarze case SCALE_PC:
27213a35416Sschwarze r = su->scale * 40.0;
27313a35416Sschwarze break;
27413a35416Sschwarze case SCALE_PT:
27513a35416Sschwarze r = su->scale * 10.0 / 3.0;
276769ee804Sschwarze break;
277d5dc6f2eSschwarze case SCALE_EN:
278d5dc6f2eSschwarze case SCALE_EM:
27913a35416Sschwarze r = su->scale * 24.0;
280769ee804Sschwarze break;
2814ffbec5dSschwarze default:
282d5dc6f2eSschwarze abort();
283769ee804Sschwarze }
284526e306bSschwarze return r > 0.0 ? r + 0.01 : r - 0.01;
285769ee804Sschwarze }
286769ee804Sschwarze
28755f79d48Sschwarze const char *
ascii_uc2str(int uc)28855f79d48Sschwarze ascii_uc2str(int uc)
28955f79d48Sschwarze {
29055f79d48Sschwarze static const char nbrsp[2] = { ASCII_NBRSP, '\0' };
29155f79d48Sschwarze static const char *tab[] = {
29255f79d48Sschwarze "<NUL>","<SOH>","<STX>","<ETX>","<EOT>","<ENQ>","<ACK>","<BEL>",
29355f79d48Sschwarze "<BS>", "\t", "<LF>", "<VT>", "<FF>", "<CR>", "<SO>", "<SI>",
29455f79d48Sschwarze "<DLE>","<DC1>","<DC2>","<DC3>","<DC4>","<NAK>","<SYN>","<ETB>",
29555f79d48Sschwarze "<CAN>","<EM>", "<SUB>","<ESC>","<FS>", "<GS>", "<RS>", "<US>",
29655f79d48Sschwarze " ", "!", "\"", "#", "$", "%", "&", "'",
29755f79d48Sschwarze "(", ")", "*", "+", ",", "-", ".", "/",
29855f79d48Sschwarze "0", "1", "2", "3", "4", "5", "6", "7",
29955f79d48Sschwarze "8", "9", ":", ";", "<", "=", ">", "?",
30055f79d48Sschwarze "@", "A", "B", "C", "D", "E", "F", "G",
30155f79d48Sschwarze "H", "I", "J", "K", "L", "M", "N", "O",
30255f79d48Sschwarze "P", "Q", "R", "S", "T", "U", "V", "W",
30355f79d48Sschwarze "X", "Y", "Z", "[", "\\", "]", "^", "_",
30455f79d48Sschwarze "`", "a", "b", "c", "d", "e", "f", "g",
30555f79d48Sschwarze "h", "i", "j", "k", "l", "m", "n", "o",
30655f79d48Sschwarze "p", "q", "r", "s", "t", "u", "v", "w",
30755f79d48Sschwarze "x", "y", "z", "{", "|", "}", "~", "<DEL>",
30855f79d48Sschwarze "<80>", "<81>", "<82>", "<83>", "<84>", "<85>", "<86>", "<87>",
30955f79d48Sschwarze "<88>", "<89>", "<8A>", "<8B>", "<8C>", "<8D>", "<8E>", "<8F>",
31055f79d48Sschwarze "<90>", "<91>", "<92>", "<93>", "<94>", "<95>", "<96>", "<97>",
3118ac50ec5Sschwarze "<98>", "<99>", "<9A>", "<9B>", "<9C>", "<9D>", "<9E>", "<9F>",
312f09271baSschwarze nbrsp, "!", "/\bc", "-\bL", "o\bx", "=\bY", "|", "<section>",
313d8d0d815Sschwarze "\"", "(C)", "_\ba", "<<", "~", "", "(R)", "-",
314c250368cSschwarze "<degree>","+-","^2", "^3", "'","<micro>","<paragraph>",".",
315c250368cSschwarze ",", "^1", "_\bo", ">>", "1/4", "1/2", "3/4", "?",
316d8d0d815Sschwarze "`\bA", "'\bA", "^\bA", "~\bA", "\"\bA","o\bA", "AE", ",\bC",
317d8d0d815Sschwarze "`\bE", "'\bE", "^\bE", "\"\bE","`\bI", "'\bI", "^\bI", "\"\bI",
318c250368cSschwarze "Dh", "~\bN", "`\bO", "'\bO", "^\bO", "~\bO", "\"\bO","x",
319d8d0d815Sschwarze "/\bO", "`\bU", "'\bU", "^\bU", "\"\bU","'\bY", "Th", "ss",
320d8d0d815Sschwarze "`\ba", "'\ba", "^\ba", "~\ba", "\"\ba","o\ba", "ae", ",\bc",
321d8d0d815Sschwarze "`\be", "'\be", "^\be", "\"\be","`\bi", "'\bi", "^\bi", "\"\bi",
322c250368cSschwarze "dh", "~\bn", "`\bo", "'\bo", "^\bo", "~\bo", "\"\bo","/",
323d8d0d815Sschwarze "/\bo", "`\bu", "'\bu", "^\bu", "\"\bu","'\by", "th", "\"\by",
324d8d0d815Sschwarze "A", "a", "A", "a", "A", "a", "'\bC", "'\bc",
325d8d0d815Sschwarze "^\bC", "^\bc", "C", "c", "C", "c", "D", "d",
326d8d0d815Sschwarze "/\bD", "/\bd", "E", "e", "E", "e", "E", "e",
327d8d0d815Sschwarze "E", "e", "E", "e", "^\bG", "^\bg", "G", "g",
328d8d0d815Sschwarze "G", "g", ",\bG", ",\bg", "^\bH", "^\bh", "/\bH", "/\bh",
329d8d0d815Sschwarze "~\bI", "~\bi", "I", "i", "I", "i", "I", "i",
330d8d0d815Sschwarze "I", "i", "IJ", "ij", "^\bJ", "^\bj", ",\bK", ",\bk",
331d8d0d815Sschwarze "q", "'\bL", "'\bl", ",\bL", ",\bl", "L", "l", "L",
332d8d0d815Sschwarze "l", "/\bL", "/\bl", "'\bN", "'\bn", ",\bN", ",\bn", "N",
33355f79d48Sschwarze "n", "'n", "Ng", "ng", "O", "o", "O", "o",
334d8d0d815Sschwarze "O", "o", "OE", "oe", "'\bR", "'\br", ",\bR", ",\br",
335d8d0d815Sschwarze "R", "r", "'\bS", "'\bs", "^\bS", "^\bs", ",\bS", ",\bs",
336d8d0d815Sschwarze "S", "s", ",\bT", ",\bt", "T", "t", "/\bT", "/\bt",
337d8d0d815Sschwarze "~\bU", "~\bu", "U", "u", "U", "u", "U", "u",
338d8d0d815Sschwarze "U", "u", "U", "u", "^\bW", "^\bw", "^\bY", "^\by",
339d8d0d815Sschwarze "\"\bY","'\bZ", "'\bz", "Z", "z", "Z", "z", "s",
34055f79d48Sschwarze "b", "B", "B", "b", "6", "6", "O", "C",
34155f79d48Sschwarze "c", "D", "D", "D", "d", "d", "3", "@",
342d8d0d815Sschwarze "E", "F", ",\bf", "G", "G", "hv", "I", "/\bI",
343d8d0d815Sschwarze "K", "k", "/\bl", "l", "W", "N", "n", "~\bO",
34455f79d48Sschwarze "O", "o", "OI", "oi", "P", "p", "YR", "2",
34555f79d48Sschwarze "2", "SH", "sh", "t", "T", "t", "T", "U",
346d8d0d815Sschwarze "u", "Y", "V", "Y", "y", "/\bZ", "/\bz", "ZH",
347d8d0d815Sschwarze "ZH", "zh", "zh", "/\b2", "5", "5", "ts", "w",
34855f79d48Sschwarze "|", "||", "|=", "!", "DZ", "Dz", "dz", "LJ",
34955f79d48Sschwarze "Lj", "lj", "NJ", "Nj", "nj", "A", "a", "I",
35055f79d48Sschwarze "i", "O", "o", "U", "u", "U", "u", "U",
35155f79d48Sschwarze "u", "U", "u", "U", "u", "@", "A", "a",
352d8d0d815Sschwarze "A", "a", "AE", "ae", "/\bG", "/\bg", "G", "g",
35355f79d48Sschwarze "K", "k", "O", "o", "O", "o", "ZH", "zh",
354d8d0d815Sschwarze "j", "DZ", "Dz", "dz", "'\bG", "'\bg", "HV", "W",
355d8d0d815Sschwarze "`\bN", "`\bn", "A", "a", "'\bAE","'\bae","O", "o"};
35655f79d48Sschwarze
3576899db98Sschwarze assert(uc >= 0);
358ed5ebdbaSschwarze if ((size_t)uc < sizeof(tab)/sizeof(tab[0]))
359526e306bSschwarze return tab[uc];
360526e306bSschwarze return mchars_uc2str(uc);
36155f79d48Sschwarze }
36255f79d48Sschwarze
363a5e11edeSschwarze static size_t
locale_width(const struct termp * p,int c)364a5e11edeSschwarze locale_width(const struct termp *p, int c)
365a5e11edeSschwarze {
366a5e11edeSschwarze int rc;
367a5e11edeSschwarze
368c9fd5525Sschwarze if (c == ASCII_NBRSP)
369c9fd5525Sschwarze c = ' ';
370c9fd5525Sschwarze rc = wcwidth(c);
371c9fd5525Sschwarze if (rc < 0)
372c9fd5525Sschwarze rc = 0;
373526e306bSschwarze return rc;
374a5e11edeSschwarze }
375a5e11edeSschwarze
376a5e11edeSschwarze static void
locale_advance(struct termp * p,size_t len)377a5e11edeSschwarze locale_advance(struct termp *p, size_t len)
378a5e11edeSschwarze {
379a5e11edeSschwarze size_t i;
380a5e11edeSschwarze
381b19a7d95Sschwarze /*
382b19a7d95Sschwarze * XXX We used to have "assert(len < UINT16_MAX)" here.
383b19a7d95Sschwarze * that is not quite right because the input document
384b19a7d95Sschwarze * can trigger that by merely providing large input.
385b19a7d95Sschwarze * For now, simply truncate.
386b19a7d95Sschwarze */
387b19a7d95Sschwarze if (len > 256)
388b19a7d95Sschwarze len = 256;
389a5e11edeSschwarze for (i = 0; i < len; i++)
390a5e11edeSschwarze putwchar(L' ');
391a5e11edeSschwarze }
392a5e11edeSschwarze
393a5e11edeSschwarze static void
locale_endline(struct termp * p)394a5e11edeSschwarze locale_endline(struct termp *p)
395a5e11edeSschwarze {
396a5e11edeSschwarze
397c0a657b3Sschwarze p->line++;
39830c2fcb2Sschwarze if ((int)p->tcol->offset > p->ti)
399e93ea447Sschwarze p->tcol->offset -= p->ti;
40030c2fcb2Sschwarze else
40130c2fcb2Sschwarze p->tcol->offset = 0;
40211d70615Sschwarze p->ti = 0;
403a5e11edeSschwarze putwchar(L'\n');
404a5e11edeSschwarze }
405a5e11edeSschwarze
406a5e11edeSschwarze static void
locale_letter(struct termp * p,int c)407a5e11edeSschwarze locale_letter(struct termp *p, int c)
408a5e11edeSschwarze {
409a5e11edeSschwarze
410a5e11edeSschwarze putwchar(c);
411a5e11edeSschwarze }
412