File: [cvsweb.bsd.lv] / mandoc / term_ascii.c (download)
Revision 1.68, Tue Aug 16 17:45:55 2022 UTC (2 years, 1 month ago) by schwarze
Branch: MAIN
Changes since 1.67: +2 -2 lines
When starting a new input line, even when continuing the same output
line, use the current output position as the reference position
for tabs on that input line. This brings mandoc in line with the
behaviour of GNU, Heirloom, and Plan 9 roff.
|
/* $Id: term_ascii.c,v 1.68 2022/08/16 17:45:55 schwarze Exp $ */
/*
* Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2014,2015,2017,2018,2020 Ingo Schwarze <schwarze@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.h"
#include <sys/types.h>
#include <assert.h>
#if HAVE_WCHAR
#include <langinfo.h>
#include <locale.h>
#endif
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if HAVE_WCHAR
#include <wchar.h>
#endif
#include "mandoc.h"
#include "mandoc_aux.h"
#include "out.h"
#include "term.h"
#include "manconf.h"
#include "main.h"
static struct termp *ascii_init(enum termenc, const struct manoutput *);
static int ascii_hspan(const struct termp *,
const struct roffsu *);
static size_t ascii_width(const struct termp *, int);
static void ascii_advance(struct termp *, size_t);
static void ascii_begin(struct termp *);
static void ascii_end(struct termp *);
static void ascii_endline(struct termp *);
static void ascii_letter(struct termp *, int);
static void ascii_setwidth(struct termp *, int, int);
#if HAVE_WCHAR
static void locale_advance(struct termp *, size_t);
static void locale_endline(struct termp *);
static void locale_letter(struct termp *, int);
static size_t locale_width(const struct termp *, int);
#endif
static struct termp *
ascii_init(enum termenc enc, const struct manoutput *outopts)
{
#if HAVE_WCHAR
char *v;
#endif
struct termp *p;
p = mandoc_calloc(1, sizeof(*p));
p->tcol = p->tcols = mandoc_calloc(1, sizeof(*p->tcol));
p->maxtcol = 1;
p->line = 1;
p->defrmargin = p->lastrmargin = 78;
p->fontq = mandoc_reallocarray(NULL,
(p->fontsz = 8), sizeof(*p->fontq));
p->fontq[0] = p->fontl = TERMFONT_NONE;
p->begin = ascii_begin;
p->end = ascii_end;
p->hspan = ascii_hspan;
p->type = TERMTYPE_CHAR;
p->enc = TERMENC_ASCII;
p->advance = ascii_advance;
p->endline = ascii_endline;
p->letter = ascii_letter;
p->setwidth = ascii_setwidth;
p->width = ascii_width;
#if HAVE_WCHAR
if (enc != TERMENC_ASCII) {
/*
* Do not change any of this to LC_ALL. It might break
* the formatting by subtly changing the behaviour of
* various functions, for example strftime(3). As a
* worst case, it might even cause buffer overflows.
*/
v = enc == TERMENC_LOCALE ?
setlocale(LC_CTYPE, "") :
setlocale(LC_CTYPE, UTF8_LOCALE);
/*
* We only support UTF-8,
* so revert to ASCII for anything else.
*/
if (v != NULL &&
strcmp(nl_langinfo(CODESET), "UTF-8") != 0)
v = setlocale(LC_CTYPE, "C");
if (v != NULL && MB_CUR_MAX > 1) {
p->enc = TERMENC_UTF8;
p->advance = locale_advance;
p->endline = locale_endline;
p->letter = locale_letter;
p->width = locale_width;
}
}
#endif
if (outopts->mdoc) {
p->mdocstyle = 1;
p->defindent = 5;
}
if (outopts->indent)
p->defindent = outopts->indent;
if (outopts->width)
p->defrmargin = outopts->width;
if (outopts->synopsisonly)
p->synopsisonly = 1;
assert(p->defindent < UINT16_MAX);
assert(p->defrmargin < UINT16_MAX);
return p;
}
void *
ascii_alloc(const struct manoutput *outopts)
{
return ascii_init(TERMENC_ASCII, outopts);
}
void *
utf8_alloc(const struct manoutput *outopts)
{
return ascii_init(TERMENC_UTF8, outopts);
}
void *
locale_alloc(const struct manoutput *outopts)
{
return ascii_init(TERMENC_LOCALE, outopts);
}
static void
ascii_setwidth(struct termp *p, int iop, int width)
{
width /= 24;
p->tcol->rmargin = p->defrmargin;
if (iop > 0)
p->defrmargin += width;
else if (iop == 0)
p->defrmargin = width ? (size_t)width : p->lastrmargin;
else if (p->defrmargin > (size_t)width)
p->defrmargin -= width;
else
p->defrmargin = 0;
if (p->defrmargin > 1000)
p->defrmargin = 1000;
p->lastrmargin = p->tcol->rmargin;
p->tcol->rmargin = p->maxrmargin = p->defrmargin;
}
void
terminal_sepline(void *arg)
{
struct termp *p;
size_t i;
p = (struct termp *)arg;
(*p->endline)(p);
for (i = 0; i < p->defrmargin; i++)
(*p->letter)(p, '-');
(*p->endline)(p);
(*p->endline)(p);
}
static size_t
ascii_width(const struct termp *p, int c)
{
return c != ASCII_BREAK && c != ASCII_NBRZW && c != ASCII_TABREF;
}
void
ascii_free(void *arg)
{
term_free((struct termp *)arg);
}
static void
ascii_letter(struct termp *p, int c)
{
putchar(c);
}
static void
ascii_begin(struct termp *p)
{
(*p->headf)(p, p->argf);
}
static void
ascii_end(struct termp *p)
{
(*p->footf)(p, p->argf);
}
static void
ascii_endline(struct termp *p)
{
p->line++;
if ((int)p->tcol->offset > p->ti)
p->tcol->offset -= p->ti;
else
p->tcol->offset = 0;
p->ti = 0;
putchar('\n');
}
static void
ascii_advance(struct termp *p, size_t len)
{
size_t i;
/*
* XXX We used to have "assert(len < UINT16_MAX)" here.
* that is not quite right because the input document
* can trigger that by merely providing large input.
* For now, simply truncate.
*/
if (len > 256)
len = 256;
for (i = 0; i < len; i++)
putchar(' ');
}
static int
ascii_hspan(const struct termp *p, const struct roffsu *su)
{
double r;
switch (su->unit) {
case SCALE_BU:
r = su->scale;
break;
case SCALE_CM:
r = su->scale * 240.0 / 2.54;
break;
case SCALE_FS:
r = su->scale * 65536.0;
break;
case SCALE_IN:
r = su->scale * 240.0;
break;
case SCALE_MM:
r = su->scale * 0.24;
break;
case SCALE_VS:
case SCALE_PC:
r = su->scale * 40.0;
break;
case SCALE_PT:
r = su->scale * 10.0 / 3.0;
break;
case SCALE_EN:
case SCALE_EM:
r = su->scale * 24.0;
break;
default:
abort();
}
return r > 0.0 ? r + 0.01 : r - 0.01;
}
const char *
ascii_uc2str(int uc)
{
static const char nbrsp[2] = { ASCII_NBRSP, '\0' };
static const char *tab[] = {
"<NUL>","<SOH>","<STX>","<ETX>","<EOT>","<ENQ>","<ACK>","<BEL>",
"<BS>", "\t", "<LF>", "<VT>", "<FF>", "<CR>", "<SO>", "<SI>",
"<DLE>","<DC1>","<DC2>","<DC3>","<DC4>","<NAK>","<SYN>","<ETB>",
"<CAN>","<EM>", "<SUB>","<ESC>","<FS>", "<GS>", "<RS>", "<US>",
" ", "!", "\"", "#", "$", "%", "&", "'",
"(", ")", "*", "+", ",", "-", ".", "/",
"0", "1", "2", "3", "4", "5", "6", "7",
"8", "9", ":", ";", "<", "=", ">", "?",
"@", "A", "B", "C", "D", "E", "F", "G",
"H", "I", "J", "K", "L", "M", "N", "O",
"P", "Q", "R", "S", "T", "U", "V", "W",
"X", "Y", "Z", "[", "\\", "]", "^", "_",
"`", "a", "b", "c", "d", "e", "f", "g",
"h", "i", "j", "k", "l", "m", "n", "o",
"p", "q", "r", "s", "t", "u", "v", "w",
"x", "y", "z", "{", "|", "}", "~", "<DEL>",
"<80>", "<81>", "<82>", "<83>", "<84>", "<85>", "<86>", "<87>",
"<88>", "<89>", "<8A>", "<8B>", "<8C>", "<8D>", "<8E>", "<8F>",
"<90>", "<91>", "<92>", "<93>", "<94>", "<95>", "<96>", "<97>",
"<98>", "<99>", "<9A>", "<9B>", "<9C>", "<9D>", "<9E>", "<9F>",
nbrsp, "!", "/\bc", "-\bL", "o\bx", "=\bY", "|", "<section>",
"\"", "(C)", "_\ba", "<<", "~", "", "(R)", "-",
"<degree>","+-","^2", "^3", "'","<micro>","<paragraph>",".",
",", "^1", "_\bo", ">>", "1/4", "1/2", "3/4", "?",
"`\bA", "'\bA", "^\bA", "~\bA", "\"\bA","o\bA", "AE", ",\bC",
"`\bE", "'\bE", "^\bE", "\"\bE","`\bI", "'\bI", "^\bI", "\"\bI",
"Dh", "~\bN", "`\bO", "'\bO", "^\bO", "~\bO", "\"\bO","x",
"/\bO", "`\bU", "'\bU", "^\bU", "\"\bU","'\bY", "Th", "ss",
"`\ba", "'\ba", "^\ba", "~\ba", "\"\ba","o\ba", "ae", ",\bc",
"`\be", "'\be", "^\be", "\"\be","`\bi", "'\bi", "^\bi", "\"\bi",
"dh", "~\bn", "`\bo", "'\bo", "^\bo", "~\bo", "\"\bo","/",
"/\bo", "`\bu", "'\bu", "^\bu", "\"\bu","'\by", "th", "\"\by",
"A", "a", "A", "a", "A", "a", "'\bC", "'\bc",
"^\bC", "^\bc", "C", "c", "C", "c", "D", "d",
"/\bD", "/\bd", "E", "e", "E", "e", "E", "e",
"E", "e", "E", "e", "^\bG", "^\bg", "G", "g",
"G", "g", ",\bG", ",\bg", "^\bH", "^\bh", "/\bH", "/\bh",
"~\bI", "~\bi", "I", "i", "I", "i", "I", "i",
"I", "i", "IJ", "ij", "^\bJ", "^\bj", ",\bK", ",\bk",
"q", "'\bL", "'\bl", ",\bL", ",\bl", "L", "l", "L",
"l", "/\bL", "/\bl", "'\bN", "'\bn", ",\bN", ",\bn", "N",
"n", "'n", "Ng", "ng", "O", "o", "O", "o",
"O", "o", "OE", "oe", "'\bR", "'\br", ",\bR", ",\br",
"R", "r", "'\bS", "'\bs", "^\bS", "^\bs", ",\bS", ",\bs",
"S", "s", ",\bT", ",\bt", "T", "t", "/\bT", "/\bt",
"~\bU", "~\bu", "U", "u", "U", "u", "U", "u",
"U", "u", "U", "u", "^\bW", "^\bw", "^\bY", "^\by",
"\"\bY","'\bZ", "'\bz", "Z", "z", "Z", "z", "s",
"b", "B", "B", "b", "6", "6", "O", "C",
"c", "D", "D", "D", "d", "d", "3", "@",
"E", "F", ",\bf", "G", "G", "hv", "I", "/\bI",
"K", "k", "/\bl", "l", "W", "N", "n", "~\bO",
"O", "o", "OI", "oi", "P", "p", "YR", "2",
"2", "SH", "sh", "t", "T", "t", "T", "U",
"u", "Y", "V", "Y", "y", "/\bZ", "/\bz", "ZH",
"ZH", "zh", "zh", "/\b2", "5", "5", "ts", "w",
"|", "||", "|=", "!", "DZ", "Dz", "dz", "LJ",
"Lj", "lj", "NJ", "Nj", "nj", "A", "a", "I",
"i", "O", "o", "U", "u", "U", "u", "U",
"u", "U", "u", "U", "u", "@", "A", "a",
"A", "a", "AE", "ae", "/\bG", "/\bg", "G", "g",
"K", "k", "O", "o", "O", "o", "ZH", "zh",
"j", "DZ", "Dz", "dz", "'\bG", "'\bg", "HV", "W",
"`\bN", "`\bn", "A", "a", "'\bAE","'\bae","O", "o"};
assert(uc >= 0);
if ((size_t)uc < sizeof(tab)/sizeof(tab[0]))
return tab[uc];
return mchars_uc2str(uc);
}
#if HAVE_WCHAR
static size_t
locale_width(const struct termp *p, int c)
{
int rc;
if (c == ASCII_NBRSP)
c = ' ';
rc = wcwidth(c);
if (rc < 0)
rc = 0;
return rc;
}
static void
locale_advance(struct termp *p, size_t len)
{
size_t i;
/*
* XXX We used to have "assert(len < UINT16_MAX)" here.
* that is not quite right because the input document
* can trigger that by merely providing large input.
* For now, simply truncate.
*/
if (len > 256)
len = 256;
for (i = 0; i < len; i++)
putwchar(L' ');
}
static void
locale_endline(struct termp *p)
{
p->line++;
if ((int)p->tcol->offset > p->ti)
p->tcol->offset -= p->ti;
else
p->tcol->offset = 0;
p->ti = 0;
putwchar(L'\n');
}
static void
locale_letter(struct termp *p, int c)
{
putwchar(c);
}
#endif