601 lines
12 KiB
C
601 lines
12 KiB
C
/* $Id: mandoc.c,v 1.83 2014/07/06 19:09:00 schwarze Exp $ */
|
|
/*
|
|
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
|
|
* Copyright (c) 2011, 2012, 2013, 2014 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.
|
|
*/
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
|
|
#include <assert.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <time.h>
|
|
|
|
#include "mandoc.h"
|
|
#include "mandoc_aux.h"
|
|
#include "libmandoc.h"
|
|
|
|
#define DATESIZE 32
|
|
|
|
static int a2time(time_t *, const char *, const char *);
|
|
static char *time2a(time_t);
|
|
|
|
|
|
enum mandoc_esc
|
|
mandoc_escape(const char **end, const char **start, int *sz)
|
|
{
|
|
const char *local_start;
|
|
int local_sz;
|
|
char term;
|
|
enum mandoc_esc gly;
|
|
|
|
/*
|
|
* When the caller doesn't provide return storage,
|
|
* use local storage.
|
|
*/
|
|
|
|
if (NULL == start)
|
|
start = &local_start;
|
|
if (NULL == sz)
|
|
sz = &local_sz;
|
|
|
|
/*
|
|
* Beyond the backslash, at least one input character
|
|
* is part of the escape sequence. With one exception
|
|
* (see below), that character won't be returned.
|
|
*/
|
|
|
|
gly = ESCAPE_ERROR;
|
|
*start = ++*end;
|
|
*sz = 0;
|
|
term = '\0';
|
|
|
|
switch ((*start)[-1]) {
|
|
/*
|
|
* First the glyphs. There are several different forms of
|
|
* these, but each eventually returns a substring of the glyph
|
|
* name.
|
|
*/
|
|
case '(':
|
|
gly = ESCAPE_SPECIAL;
|
|
*sz = 2;
|
|
break;
|
|
case '[':
|
|
gly = ESCAPE_SPECIAL;
|
|
/*
|
|
* Unicode escapes are defined in groff as \[uXXXX] to
|
|
* \[u10FFFF], where the contained value must be a valid
|
|
* Unicode codepoint. Here, however, only check whether
|
|
* it's not a zero-width escape.
|
|
*/
|
|
if ('u' == (*start)[0] && ']' != (*start)[1])
|
|
gly = ESCAPE_UNICODE;
|
|
term = ']';
|
|
break;
|
|
case 'C':
|
|
if ('\'' != **start)
|
|
return(ESCAPE_ERROR);
|
|
*start = ++*end;
|
|
if ('u' == (*start)[0] && '\'' != (*start)[1])
|
|
gly = ESCAPE_UNICODE;
|
|
else
|
|
gly = ESCAPE_SPECIAL;
|
|
term = '\'';
|
|
break;
|
|
|
|
/*
|
|
* Escapes taking no arguments at all.
|
|
*/
|
|
case 'd':
|
|
/* FALLTHROUGH */
|
|
case 'u':
|
|
return(ESCAPE_IGNORE);
|
|
|
|
/*
|
|
* The \z escape is supposed to output the following
|
|
* character without advancing the cursor position.
|
|
* Since we are mostly dealing with terminal mode,
|
|
* let us just skip the next character.
|
|
*/
|
|
case 'z':
|
|
return(ESCAPE_SKIPCHAR);
|
|
|
|
/*
|
|
* Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
|
|
* 'X' is the trigger. These have opaque sub-strings.
|
|
*/
|
|
case 'F':
|
|
/* FALLTHROUGH */
|
|
case 'g':
|
|
/* FALLTHROUGH */
|
|
case 'k':
|
|
/* FALLTHROUGH */
|
|
case 'M':
|
|
/* FALLTHROUGH */
|
|
case 'm':
|
|
/* FALLTHROUGH */
|
|
case 'n':
|
|
/* FALLTHROUGH */
|
|
case 'V':
|
|
/* FALLTHROUGH */
|
|
case 'Y':
|
|
gly = ESCAPE_IGNORE;
|
|
/* FALLTHROUGH */
|
|
case 'f':
|
|
if (ESCAPE_ERROR == gly)
|
|
gly = ESCAPE_FONT;
|
|
switch (**start) {
|
|
case '(':
|
|
*start = ++*end;
|
|
*sz = 2;
|
|
break;
|
|
case '[':
|
|
*start = ++*end;
|
|
term = ']';
|
|
break;
|
|
default:
|
|
*sz = 1;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
/*
|
|
* These escapes are of the form \X'Y', where 'X' is the trigger
|
|
* and 'Y' is any string. These have opaque sub-strings.
|
|
* The \B and \w escapes are handled in roff.c, roff_res().
|
|
*/
|
|
case 'A':
|
|
/* FALLTHROUGH */
|
|
case 'b':
|
|
/* FALLTHROUGH */
|
|
case 'D':
|
|
/* FALLTHROUGH */
|
|
case 'o':
|
|
/* FALLTHROUGH */
|
|
case 'R':
|
|
/* FALLTHROUGH */
|
|
case 'X':
|
|
/* FALLTHROUGH */
|
|
case 'Z':
|
|
if ('\0' == **start)
|
|
return(ESCAPE_ERROR);
|
|
gly = ESCAPE_IGNORE;
|
|
term = **start;
|
|
*start = ++*end;
|
|
break;
|
|
|
|
/*
|
|
* These escapes are of the form \X'N', where 'X' is the trigger
|
|
* and 'N' resolves to a numerical expression.
|
|
*/
|
|
case 'h':
|
|
/* FALLTHROUGH */
|
|
case 'H':
|
|
/* FALLTHROUGH */
|
|
case 'L':
|
|
/* FALLTHROUGH */
|
|
case 'l':
|
|
/* FALLTHROUGH */
|
|
case 'S':
|
|
/* FALLTHROUGH */
|
|
case 'v':
|
|
/* FALLTHROUGH */
|
|
case 'x':
|
|
if (strchr(" %&()*+-./0123456789:<=>", **start)) {
|
|
++*end;
|
|
return(ESCAPE_ERROR);
|
|
}
|
|
gly = ESCAPE_IGNORE;
|
|
term = **start;
|
|
*start = ++*end;
|
|
break;
|
|
|
|
/*
|
|
* Special handling for the numbered character escape.
|
|
* XXX Do any other escapes need similar handling?
|
|
*/
|
|
case 'N':
|
|
if ('\0' == **start)
|
|
return(ESCAPE_ERROR);
|
|
(*end)++;
|
|
if (isdigit((unsigned char)**start)) {
|
|
*sz = 1;
|
|
return(ESCAPE_IGNORE);
|
|
}
|
|
(*start)++;
|
|
while (isdigit((unsigned char)**end))
|
|
(*end)++;
|
|
*sz = *end - *start;
|
|
if ('\0' != **end)
|
|
(*end)++;
|
|
return(ESCAPE_NUMBERED);
|
|
|
|
/*
|
|
* Sizes get a special category of their own.
|
|
*/
|
|
case 's':
|
|
gly = ESCAPE_IGNORE;
|
|
|
|
/* See +/- counts as a sign. */
|
|
if ('+' == **end || '-' == **end || ASCII_HYPH == **end)
|
|
(*end)++;
|
|
|
|
switch (**end) {
|
|
case '(':
|
|
*start = ++*end;
|
|
*sz = 2;
|
|
break;
|
|
case '[':
|
|
*start = ++*end;
|
|
term = ']';
|
|
break;
|
|
case '\'':
|
|
*start = ++*end;
|
|
term = '\'';
|
|
break;
|
|
default:
|
|
*sz = 1;
|
|
break;
|
|
}
|
|
|
|
break;
|
|
|
|
/*
|
|
* Anything else is assumed to be a glyph.
|
|
* In this case, pass back the character after the backslash.
|
|
*/
|
|
default:
|
|
gly = ESCAPE_SPECIAL;
|
|
*start = --*end;
|
|
*sz = 1;
|
|
break;
|
|
}
|
|
|
|
assert(ESCAPE_ERROR != gly);
|
|
|
|
/*
|
|
* Read up to the terminating character,
|
|
* paying attention to nested escapes.
|
|
*/
|
|
|
|
if ('\0' != term) {
|
|
while (**end != term) {
|
|
switch (**end) {
|
|
case '\0':
|
|
return(ESCAPE_ERROR);
|
|
case '\\':
|
|
(*end)++;
|
|
if (ESCAPE_ERROR ==
|
|
mandoc_escape(end, NULL, NULL))
|
|
return(ESCAPE_ERROR);
|
|
break;
|
|
default:
|
|
(*end)++;
|
|
break;
|
|
}
|
|
}
|
|
*sz = (*end)++ - *start;
|
|
} else {
|
|
assert(*sz > 0);
|
|
if ((size_t)*sz > strlen(*start))
|
|
return(ESCAPE_ERROR);
|
|
*end += *sz;
|
|
}
|
|
|
|
/* Run post-processors. */
|
|
|
|
switch (gly) {
|
|
case ESCAPE_FONT:
|
|
if (2 == *sz) {
|
|
if ('C' == **start) {
|
|
/*
|
|
* Treat constant-width font modes
|
|
* just like regular font modes.
|
|
*/
|
|
(*start)++;
|
|
(*sz)--;
|
|
} else {
|
|
if ('B' == (*start)[0] && 'I' == (*start)[1])
|
|
gly = ESCAPE_FONTBI;
|
|
break;
|
|
}
|
|
} else if (1 != *sz)
|
|
break;
|
|
|
|
switch (**start) {
|
|
case '3':
|
|
/* FALLTHROUGH */
|
|
case 'B':
|
|
gly = ESCAPE_FONTBOLD;
|
|
break;
|
|
case '2':
|
|
/* FALLTHROUGH */
|
|
case 'I':
|
|
gly = ESCAPE_FONTITALIC;
|
|
break;
|
|
case 'P':
|
|
gly = ESCAPE_FONTPREV;
|
|
break;
|
|
case '1':
|
|
/* FALLTHROUGH */
|
|
case 'R':
|
|
gly = ESCAPE_FONTROMAN;
|
|
break;
|
|
}
|
|
break;
|
|
case ESCAPE_SPECIAL:
|
|
if (1 == *sz && 'c' == **start)
|
|
gly = ESCAPE_NOSPACE;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return(gly);
|
|
}
|
|
|
|
/*
|
|
* Parse a quoted or unquoted roff-style request or macro argument.
|
|
* Return a pointer to the parsed argument, which is either the original
|
|
* pointer or advanced by one byte in case the argument is quoted.
|
|
* NUL-terminate the argument in place.
|
|
* Collapse pairs of quotes inside quoted arguments.
|
|
* Advance the argument pointer to the next argument,
|
|
* or to the NUL byte terminating the argument line.
|
|
*/
|
|
char *
|
|
mandoc_getarg(struct mparse *parse, char **cpp, int ln, int *pos)
|
|
{
|
|
char *start, *cp;
|
|
int quoted, pairs, white;
|
|
|
|
/* Quoting can only start with a new word. */
|
|
start = *cpp;
|
|
quoted = 0;
|
|
if ('"' == *start) {
|
|
quoted = 1;
|
|
start++;
|
|
}
|
|
|
|
pairs = 0;
|
|
white = 0;
|
|
for (cp = start; '\0' != *cp; cp++) {
|
|
|
|
/*
|
|
* Move the following text left
|
|
* after quoted quotes and after "\\" and "\t".
|
|
*/
|
|
if (pairs)
|
|
cp[-pairs] = cp[0];
|
|
|
|
if ('\\' == cp[0]) {
|
|
/*
|
|
* In copy mode, translate double to single
|
|
* backslashes and backslash-t to literal tabs.
|
|
*/
|
|
switch (cp[1]) {
|
|
case 't':
|
|
cp[0] = '\t';
|
|
/* FALLTHROUGH */
|
|
case '\\':
|
|
pairs++;
|
|
cp++;
|
|
break;
|
|
case ' ':
|
|
/* Skip escaped blanks. */
|
|
if (0 == quoted)
|
|
cp++;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
} else if (0 == quoted) {
|
|
if (' ' == cp[0]) {
|
|
/* Unescaped blanks end unquoted args. */
|
|
white = 1;
|
|
break;
|
|
}
|
|
} else if ('"' == cp[0]) {
|
|
if ('"' == cp[1]) {
|
|
/* Quoted quotes collapse. */
|
|
pairs++;
|
|
cp++;
|
|
} else {
|
|
/* Unquoted quotes end quoted args. */
|
|
quoted = 2;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Quoted argument without a closing quote. */
|
|
if (1 == quoted)
|
|
mandoc_msg(MANDOCERR_ARG_QUOTE, parse, ln, *pos, NULL);
|
|
|
|
/* NUL-terminate this argument and move to the next one. */
|
|
if (pairs)
|
|
cp[-pairs] = '\0';
|
|
if ('\0' != *cp) {
|
|
*cp++ = '\0';
|
|
while (' ' == *cp)
|
|
cp++;
|
|
}
|
|
*pos += (int)(cp - start) + (quoted ? 1 : 0);
|
|
*cpp = cp;
|
|
|
|
if ('\0' == *cp && (white || ' ' == cp[-1]))
|
|
mandoc_msg(MANDOCERR_SPACE_EOL, parse, ln, *pos, NULL);
|
|
|
|
return(start);
|
|
}
|
|
|
|
static int
|
|
a2time(time_t *t, const char *fmt, const char *p)
|
|
{
|
|
struct tm tm;
|
|
char *pp;
|
|
|
|
memset(&tm, 0, sizeof(struct tm));
|
|
|
|
pp = NULL;
|
|
#ifdef HAVE_STRPTIME
|
|
pp = strptime(p, fmt, &tm);
|
|
#endif
|
|
if (NULL != pp && '\0' == *pp) {
|
|
*t = mktime(&tm);
|
|
return(1);
|
|
}
|
|
|
|
return(0);
|
|
}
|
|
|
|
static char *
|
|
time2a(time_t t)
|
|
{
|
|
struct tm *tm;
|
|
char *buf, *p;
|
|
size_t ssz;
|
|
int isz;
|
|
|
|
tm = localtime(&t);
|
|
|
|
/*
|
|
* Reserve space:
|
|
* up to 9 characters for the month (September) + blank
|
|
* up to 2 characters for the day + comma + blank
|
|
* 4 characters for the year and a terminating '\0'
|
|
*/
|
|
p = buf = mandoc_malloc(10 + 4 + 4 + 1);
|
|
|
|
if (0 == (ssz = strftime(p, 10 + 1, "%B ", tm)))
|
|
goto fail;
|
|
p += (int)ssz;
|
|
|
|
if (-1 == (isz = snprintf(p, 4 + 1, "%d, ", tm->tm_mday)))
|
|
goto fail;
|
|
p += isz;
|
|
|
|
if (0 == strftime(p, 4 + 1, "%Y", tm))
|
|
goto fail;
|
|
return(buf);
|
|
|
|
fail:
|
|
free(buf);
|
|
return(NULL);
|
|
}
|
|
|
|
char *
|
|
mandoc_normdate(struct mparse *parse, char *in, int ln, int pos)
|
|
{
|
|
char *out;
|
|
time_t t;
|
|
|
|
if (NULL == in || '\0' == *in ||
|
|
0 == strcmp(in, "$" "Mdocdate$")) {
|
|
mandoc_msg(MANDOCERR_DATE_MISSING, parse, ln, pos, NULL);
|
|
time(&t);
|
|
}
|
|
else if (a2time(&t, "%Y-%m-%d", in))
|
|
t = 0;
|
|
else if (!a2time(&t, "$" "Mdocdate: %b %d %Y $", in) &&
|
|
!a2time(&t, "%b %d, %Y", in)) {
|
|
mandoc_msg(MANDOCERR_DATE_BAD, parse, ln, pos, in);
|
|
t = 0;
|
|
}
|
|
out = t ? time2a(t) : NULL;
|
|
return(out ? out : mandoc_strdup(in));
|
|
}
|
|
|
|
int
|
|
mandoc_eos(const char *p, size_t sz)
|
|
{
|
|
const char *q;
|
|
int enclosed, found;
|
|
|
|
if (0 == sz)
|
|
return(0);
|
|
|
|
/*
|
|
* End-of-sentence recognition must include situations where
|
|
* some symbols, such as `)', allow prior EOS punctuation to
|
|
* propagate outward.
|
|
*/
|
|
|
|
enclosed = found = 0;
|
|
for (q = p + (int)sz - 1; q >= p; q--) {
|
|
switch (*q) {
|
|
case '\"':
|
|
/* FALLTHROUGH */
|
|
case '\'':
|
|
/* FALLTHROUGH */
|
|
case ']':
|
|
/* FALLTHROUGH */
|
|
case ')':
|
|
if (0 == found)
|
|
enclosed = 1;
|
|
break;
|
|
case '.':
|
|
/* FALLTHROUGH */
|
|
case '!':
|
|
/* FALLTHROUGH */
|
|
case '?':
|
|
found = 1;
|
|
break;
|
|
default:
|
|
return(found && (!enclosed || isalnum((unsigned char)*q)));
|
|
}
|
|
}
|
|
|
|
return(found && !enclosed);
|
|
}
|
|
|
|
/*
|
|
* Convert a string to a long that may not be <0.
|
|
* If the string is invalid, or is less than 0, return -1.
|
|
*/
|
|
int
|
|
mandoc_strntoi(const char *p, size_t sz, int base)
|
|
{
|
|
char buf[32];
|
|
char *ep;
|
|
long v;
|
|
|
|
if (sz > 31)
|
|
return(-1);
|
|
|
|
memcpy(buf, p, sz);
|
|
buf[(int)sz] = '\0';
|
|
|
|
errno = 0;
|
|
v = strtol(buf, &ep, base);
|
|
|
|
if (buf[0] == '\0' || *ep != '\0')
|
|
return(-1);
|
|
|
|
if (v > INT_MAX)
|
|
v = INT_MAX;
|
|
if (v < INT_MIN)
|
|
v = INT_MIN;
|
|
|
|
return((int)v);
|
|
}
|