xref: /illumos-gate/usr/src/cmd/mandoc/term_ascii.c (revision 55fea89d)
1 /* $Id: term_ascii.c,v 1.66 2020/09/09 13:45:05 schwarze Exp $ */
2 /*
3  * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4  * Copyright (c) 2014,2015,2017,2018,2020 Ingo Schwarze <schwarze@openbsd.org>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 #include "config.h"
19 
20 #include <sys/types.h>
21 
22 #include <assert.h>
23 #if HAVE_WCHAR
24 #include <langinfo.h>
25 #include <locale.h>
26 #endif
27 #include <stdint.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32 #if HAVE_WCHAR
33 #include <wchar.h>
34 #endif
35 
36 #include "mandoc.h"
37 #include "mandoc_aux.h"
38 #include "out.h"
39 #include "term.h"
40 #include "manconf.h"
41 #include "main.h"
42 
43 static	struct termp	 *ascii_init(enum termenc, const struct manoutput *);
44 static	int		  ascii_hspan(const struct termp *,
45 				const struct roffsu *);
46 static	size_t		  ascii_width(const struct termp *, int);
47 static	void		  ascii_advance(struct termp *, size_t);
48 static	void		  ascii_begin(struct termp *);
49 static	void		  ascii_end(struct termp *);
50 static	void		  ascii_endline(struct termp *);
51 static	void		  ascii_letter(struct termp *, int);
52 static	void		  ascii_setwidth(struct termp *, int, int);
53 
54 #if HAVE_WCHAR
55 static	void		  locale_advance(struct termp *, size_t);
56 static	void		  locale_endline(struct termp *);
57 static	void		  locale_letter(struct termp *, int);
58 static	size_t		  locale_width(const struct termp *, int);
59 #endif
60 
61 
62 static struct termp *
ascii_init(enum termenc enc,const struct manoutput * outopts)63 ascii_init(enum termenc enc, const struct manoutput *outopts)
64 {
65 #if HAVE_WCHAR
66 	char		*v;
67 #endif
68 	struct termp	*p;
69 
70 	p = mandoc_calloc(1, sizeof(*p));
71 	p->tcol = p->tcols = mandoc_calloc(1, sizeof(*p->tcol));
72 	p->maxtcol = 1;
73 
74 	p->line = 1;
75 	p->defrmargin = p->lastrmargin = 78;
76 	p->fontq = mandoc_reallocarray(NULL,
77 	     (p->fontsz = 8), sizeof(*p->fontq));
78 	p->fontq[0] = p->fontl = TERMFONT_NONE;
79 
80 	p->begin = ascii_begin;
81 	p->end = ascii_end;
82 	p->hspan = ascii_hspan;
83 	p->type = TERMTYPE_CHAR;
84 
85 	p->enc = TERMENC_ASCII;
86 	p->advance = ascii_advance;
87 	p->endline = ascii_endline;
88 	p->letter = ascii_letter;
89 	p->setwidth = ascii_setwidth;
90 	p->width = ascii_width;
91 
92 #if HAVE_WCHAR
93 	if (enc != TERMENC_ASCII) {
94 
95 		/*
96 		 * Do not change any of this to LC_ALL.  It might break
97 		 * the formatting by subtly changing the behaviour of
98 		 * various functions, for example strftime(3).  As a
99 		 * worst case, it might even cause buffer overflows.
100 		 */
101 
102 		v = enc == TERMENC_LOCALE ?
103 		    setlocale(LC_CTYPE, "") :
104 		    setlocale(LC_CTYPE, UTF8_LOCALE);
105 
106 		/*
107 		 * We only support UTF-8,
108 		 * so revert to ASCII for anything else.
109 		 */
110 
111 		if (v != NULL &&
112 		    strcmp(nl_langinfo(CODESET), "UTF-8") != 0)
113 			v = setlocale(LC_CTYPE, "C");
114 
115 		if (v != NULL && MB_CUR_MAX > 1) {
116 			p->enc = TERMENC_UTF8;
117 			p->advance = locale_advance;
118 			p->endline = locale_endline;
119 			p->letter = locale_letter;
120 			p->width = locale_width;
121 		}
122 	}
123 #endif
124 
125 	if (outopts->mdoc) {
126 		p->mdocstyle = 1;
127 		p->defindent = 5;
128 	}
129 	if (outopts->indent)
130 		p->defindent = outopts->indent;
131 	if (outopts->width)
132 		p->defrmargin = outopts->width;
133 	if (outopts->synopsisonly)
134 		p->synopsisonly = 1;
135 
136 	assert(p->defindent < UINT16_MAX);
137 	assert(p->defrmargin < UINT16_MAX);
138 	return p;
139 }
140 
141 void *
ascii_alloc(const struct manoutput * outopts)142 ascii_alloc(const struct manoutput *outopts)
143 {
144 
145 	return ascii_init(TERMENC_ASCII, outopts);
146 }
147 
148 void *
utf8_alloc(const struct manoutput * outopts)149 utf8_alloc(const struct manoutput *outopts)
150 {
151 
152 	return ascii_init(TERMENC_UTF8, outopts);
153 }
154 
155 void *
locale_alloc(const struct manoutput * outopts)156 locale_alloc(const struct manoutput *outopts)
157 {
158 
159 	return ascii_init(TERMENC_LOCALE, outopts);
160 }
161 
162 static void
ascii_setwidth(struct termp * p,int iop,int width)163 ascii_setwidth(struct termp *p, int iop, int width)
164 {
165 
166 	width /= 24;
167 	p->tcol->rmargin = p->defrmargin;
168 	if (iop > 0)
169 		p->defrmargin += width;
170 	else if (iop == 0)
171 		p->defrmargin = width ? (size_t)width : p->lastrmargin;
172 	else if (p->defrmargin > (size_t)width)
173 		p->defrmargin -= width;
174 	else
175 		p->defrmargin = 0;
176 	if (p->defrmargin > 1000)
177 		p->defrmargin = 1000;
178 	p->lastrmargin = p->tcol->rmargin;
179 	p->tcol->rmargin = p->maxrmargin = p->defrmargin;
180 }
181 
182 void
terminal_sepline(void * arg)183 terminal_sepline(void *arg)
184 {
185 	struct termp	*p;
186 	size_t		 i;
187 
188 	p = (struct termp *)arg;
189 	(*p->endline)(p);
190 	for (i = 0; i < p->defrmargin; i++)
191 		(*p->letter)(p, '-');
192 	(*p->endline)(p);
193 	(*p->endline)(p);
194 }
195 
196 static size_t
ascii_width(const struct termp * p,int c)197 ascii_width(const struct termp *p, int c)
198 {
199 	return c != ASCII_BREAK;
200 }
201 
202 void
ascii_free(void * arg)203 ascii_free(void *arg)
204 {
205 
206 	term_free((struct termp *)arg);
207 }
208 
209 static void
ascii_letter(struct termp * p,int c)210 ascii_letter(struct termp *p, int c)
211 {
212 
213 	putchar(c);
214 }
215 
216 static void
ascii_begin(struct termp * p)217 ascii_begin(struct termp *p)
218 {
219 
220 	(*p->headf)(p, p->argf);
221 }
222 
223 static void
ascii_end(struct termp * p)224 ascii_end(struct termp *p)
225 {
226 
227 	(*p->footf)(p, p->argf);
228 }
229 
230 static void
ascii_endline(struct termp * p)231 ascii_endline(struct termp *p)
232 {
233 
234 	p->line++;
235 	if ((int)p->tcol->offset > p->ti)
236 		p->tcol->offset -= p->ti;
237 	else
238 		p->tcol->offset = 0;
239 	p->ti = 0;
240 	putchar('\n');
241 }
242 
243 static void
ascii_advance(struct termp * p,size_t len)244 ascii_advance(struct termp *p, size_t len)
245 {
246 	size_t		i;
247 
248 	/*
249 	 * XXX We used to have "assert(len < UINT16_MAX)" here.
250 	 * that is not quite right because the input document
251 	 * can trigger that by merely providing large input.
252 	 * For now, simply truncate.
253 	 */
254 	if (len > 256)
255 		len = 256;
256 	for (i = 0; i < len; i++)
257 		putchar(' ');
258 }
259 
260 static int
ascii_hspan(const struct termp * p,const struct roffsu * su)261 ascii_hspan(const struct termp *p, const struct roffsu *su)
262 {
263 	double		 r;
264 
265 	switch (su->unit) {
266 	case SCALE_BU:
267 		r = su->scale;
268 		break;
269 	case SCALE_CM:
270 		r = su->scale * 240.0 / 2.54;
271 		break;
272 	case SCALE_FS:
273 		r = su->scale * 65536.0;
274 		break;
275 	case SCALE_IN:
276 		r = su->scale * 240.0;
277 		break;
278 	case SCALE_MM:
279 		r = su->scale * 0.24;
280 		break;
281 	case SCALE_VS:
282 	case SCALE_PC:
283 		r = su->scale * 40.0;
284 		break;
285 	case SCALE_PT:
286 		r = su->scale * 10.0 / 3.0;
287 		break;
288 	case SCALE_EN:
289 	case SCALE_EM:
290 		r = su->scale * 24.0;
291 		break;
292 	default:
293 		abort();
294 	}
295 	return r > 0.0 ? r + 0.01 : r - 0.01;
296 }
297 
298 const char *
ascii_uc2str(int uc)299 ascii_uc2str(int uc)
300 {
301 	static const char nbrsp[2] = { ASCII_NBRSP, '\0' };
302 	static const char *tab[] = {
303 	"<NUL>","<SOH>","<STX>","<ETX>","<EOT>","<ENQ>","<ACK>","<BEL>",
304 	"<BS>",	"\t",	"<LF>",	"<VT>",	"<FF>",	"<CR>",	"<SO>",	"<SI>",
305 	"<DLE>","<DC1>","<DC2>","<DC3>","<DC4>","<NAK>","<SYN>","<ETB>",
306 	"<CAN>","<EM>",	"<SUB>","<ESC>","<FS>",	"<GS>",	"<RS>",	"<US>",
307 	" ",	"!",	"\"",	"#",	"$",	"%",	"&",	"'",
308 	"(",	")",	"*",	"+",	",",	"-",	".",	"/",
309 	"0",	"1",	"2",	"3",	"4",	"5",	"6",	"7",
310 	"8",	"9",	":",	";",	"<",	"=",	">",	"?",
311 	"@",	"A",	"B",	"C",	"D",	"E",	"F",	"G",
312 	"H",	"I",	"J",	"K",	"L",	"M",	"N",	"O",
313 	"P",	"Q",	"R",	"S",	"T",	"U",	"V",	"W",
314 	"X",	"Y",	"Z",	"[",	"\\",	"]",	"^",	"_",
315 	"`",	"a",	"b",	"c",	"d",	"e",	"f",	"g",
316 	"h",	"i",	"j",	"k",	"l",	"m",	"n",	"o",
317 	"p",	"q",	"r",	"s",	"t",	"u",	"v",	"w",
318 	"x",	"y",	"z",	"{",	"|",	"}",	"~",	"<DEL>",
319 	"<80>",	"<81>",	"<82>",	"<83>",	"<84>",	"<85>",	"<86>",	"<87>",
320 	"<88>",	"<89>",	"<8A>",	"<8B>",	"<8C>",	"<8D>",	"<8E>",	"<8F>",
321 	"<90>",	"<91>",	"<92>",	"<93>",	"<94>",	"<95>",	"<96>",	"<97>",
322 	"<98>",	"<99>",	"<9A>",	"<9B>",	"<9C>",	"<9D>",	"<9E>",	"<9F>",
323 	nbrsp,	"!",	"/\bc",	"-\bL",	"o\bx",	"=\bY",	"|",	"<section>",
324 	"\"",	"(C)",	"_\ba",	"<<",	"~",	"",	"(R)",	"-",
325 	"<degree>","+-","^2",	"^3",	"'","<micro>","<paragraph>",".",
326 	",",	"^1",	"_\bo",	">>",	"1/4",	"1/2",	"3/4",	"?",
327 	"`\bA",	"'\bA",	"^\bA",	"~\bA",	"\"\bA","o\bA",	"AE",	",\bC",
328 	"`\bE",	"'\bE",	"^\bE",	"\"\bE","`\bI",	"'\bI",	"^\bI",	"\"\bI",
329 	"Dh",	"~\bN",	"`\bO",	"'\bO",	"^\bO",	"~\bO",	"\"\bO","x",
330 	"/\bO",	"`\bU",	"'\bU",	"^\bU",	"\"\bU","'\bY",	"Th",	"ss",
331 	"`\ba",	"'\ba",	"^\ba",	"~\ba",	"\"\ba","o\ba",	"ae",	",\bc",
332 	"`\be",	"'\be",	"^\be",	"\"\be","`\bi",	"'\bi",	"^\bi",	"\"\bi",
333 	"dh",	"~\bn",	"`\bo",	"'\bo",	"^\bo",	"~\bo",	"\"\bo","/",
334 	"/\bo",	"`\bu",	"'\bu",	"^\bu",	"\"\bu","'\by",	"th",	"\"\by",
335 	"A",	"a",	"A",	"a",	"A",	"a",	"'\bC",	"'\bc",
336 	"^\bC",	"^\bc",	"C",	"c",	"C",	"c",	"D",	"d",
337 	"/\bD",	"/\bd",	"E",	"e",	"E",	"e",	"E",	"e",
338 	"E",	"e",	"E",	"e",	"^\bG",	"^\bg",	"G",	"g",
339 	"G",	"g",	",\bG",	",\bg",	"^\bH",	"^\bh",	"/\bH",	"/\bh",
340 	"~\bI",	"~\bi",	"I",	"i",	"I",	"i",	"I",	"i",
341 	"I",	"i",	"IJ",	"ij",	"^\bJ",	"^\bj",	",\bK",	",\bk",
342 	"q",	"'\bL",	"'\bl",	",\bL",	",\bl",	"L",	"l",	"L",
343 	"l",	"/\bL",	"/\bl",	"'\bN",	"'\bn",	",\bN",	",\bn",	"N",
344 	"n",	"'n",	"Ng",	"ng",	"O",	"o",	"O",	"o",
345 	"O",	"o",	"OE",	"oe",	"'\bR",	"'\br",	",\bR",	",\br",
346 	"R",	"r",	"'\bS",	"'\bs",	"^\bS",	"^\bs",	",\bS",	",\bs",
347 	"S",	"s",	",\bT",	",\bt",	"T",	"t",	"/\bT",	"/\bt",
348 	"~\bU",	"~\bu",	"U",	"u",	"U",	"u",	"U",	"u",
349 	"U",	"u",	"U",	"u",	"^\bW",	"^\bw",	"^\bY",	"^\by",
350 	"\"\bY","'\bZ",	"'\bz",	"Z",	"z",	"Z",	"z",	"s",
351 	"b",	"B",	"B",	"b",	"6",	"6",	"O",	"C",
352 	"c",	"D",	"D",	"D",	"d",	"d",	"3",	"@",
353 	"E",	"F",	",\bf",	"G",	"G",	"hv",	"I",	"/\bI",
354 	"K",	"k",	"/\bl",	"l",	"W",	"N",	"n",	"~\bO",
355 	"O",	"o",	"OI",	"oi",	"P",	"p",	"YR",	"2",
356 	"2",	"SH",	"sh",	"t",	"T",	"t",	"T",	"U",
357 	"u",	"Y",	"V",	"Y",	"y",	"/\bZ",	"/\bz",	"ZH",
358 	"ZH",	"zh",	"zh",	"/\b2",	"5",	"5",	"ts",	"w",
359 	"|",	"||",	"|=",	"!",	"DZ",	"Dz",	"dz",	"LJ",
360 	"Lj",	"lj",	"NJ",	"Nj",	"nj",	"A",	"a",	"I",
361 	"i",	"O",	"o",	"U",	"u",	"U",	"u",	"U",
362 	"u",	"U",	"u",	"U",	"u",	"@",	"A",	"a",
363 	"A",	"a",	"AE",	"ae",	"/\bG",	"/\bg",	"G",	"g",
364 	"K",	"k",	"O",	"o",	"O",	"o",	"ZH",	"zh",
365 	"j",	"DZ",	"Dz",	"dz",	"'\bG",	"'\bg",	"HV",	"W",
366 	"`\bN",	"`\bn",	"A",	"a",	"'\bAE","'\bae","O",	"o"};
367 
368 	assert(uc >= 0);
369 	if ((size_t)uc < sizeof(tab)/sizeof(tab[0]))
370 		return tab[uc];
371 	return mchars_uc2str(uc);
372 }
373 
374 #if HAVE_WCHAR
375 static size_t
locale_width(const struct termp * p,int c)376 locale_width(const struct termp *p, int c)
377 {
378 	int		rc;
379 
380 	if (c == ASCII_NBRSP)
381 		c = ' ';
382 	rc = wcwidth(c);
383 	if (rc < 0)
384 		rc = 0;
385 	return rc;
386 }
387 
388 static void
locale_advance(struct termp * p,size_t len)389 locale_advance(struct termp *p, size_t len)
390 {
391 	size_t		i;
392 
393 	/*
394 	 * XXX We used to have "assert(len < UINT16_MAX)" here.
395 	 * that is not quite right because the input document
396 	 * can trigger that by merely providing large input.
397 	 * For now, simply truncate.
398 	 */
399 	if (len > 256)
400 		len = 256;
401 	for (i = 0; i < len; i++)
402 		putwchar(L' ');
403 }
404 
405 static void
locale_endline(struct termp * p)406 locale_endline(struct termp *p)
407 {
408 
409 	p->line++;
410 	if ((int)p->tcol->offset > p->ti)
411 		p->tcol->offset -= p->ti;
412 	else
413 		p->tcol->offset = 0;
414 	p->ti = 0;
415 	putwchar(L'\n');
416 }
417 
418 static void
locale_letter(struct termp * p,int c)419 locale_letter(struct termp *p, int c)
420 {
421 
422 	putwchar(c);
423 }
424 #endif
425