669 lines
12 KiB
C
669 lines
12 KiB
C
/* $Id: mandoc.c,v 1.74 2013/12/30 18:30:32 schwarze Exp $ */
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/*
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* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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* Copyright (c) 2011, 2012, 2013 Ingo Schwarze <schwarze@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <sys/types.h>
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#include <assert.h>
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#include <ctype.h>
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#include <errno.h>
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#include <limits.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include "mandoc.h"
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#include "libmandoc.h"
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#define DATESIZE 32
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static int a2time(time_t *, const char *, const char *);
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static char *time2a(time_t);
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enum mandoc_esc
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mandoc_escape(const char **end, const char **start, int *sz)
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{
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const char *local_start;
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int local_sz;
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char term;
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enum mandoc_esc gly;
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/*
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* When the caller doesn't provide return storage,
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* use local storage.
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*/
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if (NULL == start)
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start = &local_start;
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if (NULL == sz)
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sz = &local_sz;
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/*
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* Beyond the backslash, at least one input character
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* is part of the escape sequence. With one exception
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* (see below), that character won't be returned.
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*/
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gly = ESCAPE_ERROR;
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*start = ++*end;
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*sz = 0;
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term = '\0';
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switch ((*start)[-1]) {
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/*
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* First the glyphs. There are several different forms of
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* these, but each eventually returns a substring of the glyph
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* name.
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*/
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case ('('):
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gly = ESCAPE_SPECIAL;
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*sz = 2;
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break;
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case ('['):
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gly = ESCAPE_SPECIAL;
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/*
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* Unicode escapes are defined in groff as \[uXXXX] to
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* \[u10FFFF], where the contained value must be a valid
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* Unicode codepoint. Here, however, only check whether
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* it's not a zero-width escape.
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*/
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if ('u' == (*start)[0] && ']' != (*start)[1])
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gly = ESCAPE_UNICODE;
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term = ']';
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break;
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case ('C'):
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if ('\'' != **start)
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return(ESCAPE_ERROR);
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*start = ++*end;
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if ('u' == (*start)[0] && '\'' != (*start)[1])
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gly = ESCAPE_UNICODE;
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else
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gly = ESCAPE_SPECIAL;
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term = '\'';
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break;
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/*
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* Escapes taking no arguments at all.
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*/
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case ('d'):
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/* FALLTHROUGH */
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case ('u'):
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return(ESCAPE_IGNORE);
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/*
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* The \z escape is supposed to output the following
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* character without advancing the cursor position.
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* Since we are mostly dealing with terminal mode,
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* let us just skip the next character.
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*/
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case ('z'):
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return(ESCAPE_SKIPCHAR);
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/*
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* Handle all triggers matching \X(xy, \Xx, and \X[xxxx], where
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* 'X' is the trigger. These have opaque sub-strings.
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*/
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case ('F'):
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/* FALLTHROUGH */
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case ('g'):
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/* FALLTHROUGH */
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case ('k'):
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/* FALLTHROUGH */
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case ('M'):
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/* FALLTHROUGH */
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case ('m'):
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/* FALLTHROUGH */
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case ('n'):
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/* FALLTHROUGH */
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case ('V'):
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/* FALLTHROUGH */
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case ('Y'):
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gly = ESCAPE_IGNORE;
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/* FALLTHROUGH */
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case ('f'):
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if (ESCAPE_ERROR == gly)
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gly = ESCAPE_FONT;
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switch (**start) {
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case ('('):
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*start = ++*end;
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*sz = 2;
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break;
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case ('['):
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*start = ++*end;
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term = ']';
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break;
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default:
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*sz = 1;
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break;
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}
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break;
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/*
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* These escapes are of the form \X'Y', where 'X' is the trigger
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* and 'Y' is any string. These have opaque sub-strings.
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*/
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case ('A'):
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/* FALLTHROUGH */
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case ('b'):
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/* FALLTHROUGH */
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case ('B'):
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/* FALLTHROUGH */
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case ('D'):
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/* FALLTHROUGH */
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case ('o'):
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/* FALLTHROUGH */
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case ('R'):
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/* FALLTHROUGH */
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case ('w'):
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/* FALLTHROUGH */
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case ('X'):
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/* FALLTHROUGH */
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case ('Z'):
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if ('\'' != **start)
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return(ESCAPE_ERROR);
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gly = ESCAPE_IGNORE;
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*start = ++*end;
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term = '\'';
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break;
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/*
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* These escapes are of the form \X'N', where 'X' is the trigger
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* and 'N' resolves to a numerical expression.
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*/
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case ('h'):
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/* FALLTHROUGH */
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case ('H'):
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/* FALLTHROUGH */
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case ('L'):
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/* FALLTHROUGH */
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case ('l'):
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/* FALLTHROUGH */
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case ('S'):
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/* FALLTHROUGH */
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case ('v'):
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/* FALLTHROUGH */
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case ('x'):
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if ('\'' != **start)
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return(ESCAPE_ERROR);
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gly = ESCAPE_IGNORE;
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*start = ++*end;
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term = '\'';
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break;
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/*
|
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* Special handling for the numbered character escape.
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* XXX Do any other escapes need similar handling?
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*/
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case ('N'):
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if ('\0' == **start)
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return(ESCAPE_ERROR);
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(*end)++;
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if (isdigit((unsigned char)**start)) {
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*sz = 1;
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return(ESCAPE_IGNORE);
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}
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(*start)++;
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while (isdigit((unsigned char)**end))
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(*end)++;
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*sz = *end - *start;
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if ('\0' != **end)
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(*end)++;
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return(ESCAPE_NUMBERED);
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/*
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* Sizes get a special category of their own.
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*/
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case ('s'):
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gly = ESCAPE_IGNORE;
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/* See +/- counts as a sign. */
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if ('+' == **end || '-' == **end || ASCII_HYPH == **end)
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(*end)++;
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switch (**end) {
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case ('('):
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*start = ++*end;
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*sz = 2;
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break;
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case ('['):
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*start = ++*end;
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term = ']';
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break;
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case ('\''):
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*start = ++*end;
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term = '\'';
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break;
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default:
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*sz = 1;
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break;
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}
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break;
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/*
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* Anything else is assumed to be a glyph.
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* In this case, pass back the character after the backslash.
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*/
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default:
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gly = ESCAPE_SPECIAL;
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*start = --*end;
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*sz = 1;
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break;
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}
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assert(ESCAPE_ERROR != gly);
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/*
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* Read up to the terminating character,
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* paying attention to nested escapes.
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*/
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if ('\0' != term) {
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while (**end != term) {
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switch (**end) {
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case ('\0'):
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return(ESCAPE_ERROR);
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case ('\\'):
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(*end)++;
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if (ESCAPE_ERROR ==
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mandoc_escape(end, NULL, NULL))
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return(ESCAPE_ERROR);
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break;
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default:
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(*end)++;
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break;
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}
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}
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*sz = (*end)++ - *start;
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} else {
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assert(*sz > 0);
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if ((size_t)*sz > strlen(*start))
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return(ESCAPE_ERROR);
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*end += *sz;
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}
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|
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/* Run post-processors. */
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switch (gly) {
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case (ESCAPE_FONT):
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if (2 == *sz) {
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if ('C' == **start) {
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/*
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* Treat constant-width font modes
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* just like regular font modes.
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*/
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(*start)++;
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(*sz)--;
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} else {
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if ('B' == (*start)[0] && 'I' == (*start)[1])
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gly = ESCAPE_FONTBI;
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break;
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}
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} else if (1 != *sz)
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break;
|
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|
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switch (**start) {
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case ('3'):
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/* FALLTHROUGH */
|
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case ('B'):
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gly = ESCAPE_FONTBOLD;
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break;
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case ('2'):
|
|
/* FALLTHROUGH */
|
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case ('I'):
|
|
gly = ESCAPE_FONTITALIC;
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break;
|
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case ('P'):
|
|
gly = ESCAPE_FONTPREV;
|
|
break;
|
|
case ('1'):
|
|
/* FALLTHROUGH */
|
|
case ('R'):
|
|
gly = ESCAPE_FONTROMAN;
|
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break;
|
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}
|
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break;
|
|
case (ESCAPE_SPECIAL):
|
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if (1 == *sz && 'c' == **start)
|
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gly = ESCAPE_NOSPACE;
|
|
break;
|
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default:
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break;
|
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}
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|
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return(gly);
|
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}
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|
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void *
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mandoc_calloc(size_t num, size_t size)
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{
|
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void *ptr;
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|
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ptr = calloc(num, size);
|
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if (NULL == ptr) {
|
|
perror(NULL);
|
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exit((int)MANDOCLEVEL_SYSERR);
|
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}
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|
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return(ptr);
|
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}
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|
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void *
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mandoc_malloc(size_t size)
|
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{
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|
void *ptr;
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|
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ptr = malloc(size);
|
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if (NULL == ptr) {
|
|
perror(NULL);
|
|
exit((int)MANDOCLEVEL_SYSERR);
|
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}
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|
|
return(ptr);
|
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}
|
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|
|
|
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void *
|
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mandoc_realloc(void *ptr, size_t size)
|
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{
|
|
|
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ptr = realloc(ptr, size);
|
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if (NULL == ptr) {
|
|
perror(NULL);
|
|
exit((int)MANDOCLEVEL_SYSERR);
|
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}
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|
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return(ptr);
|
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}
|
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|
|
char *
|
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mandoc_strndup(const char *ptr, size_t sz)
|
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{
|
|
char *p;
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|
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p = mandoc_malloc(sz + 1);
|
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memcpy(p, ptr, sz);
|
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p[(int)sz] = '\0';
|
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return(p);
|
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}
|
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|
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char *
|
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mandoc_strdup(const char *ptr)
|
|
{
|
|
char *p;
|
|
|
|
p = strdup(ptr);
|
|
if (NULL == p) {
|
|
perror(NULL);
|
|
exit((int)MANDOCLEVEL_SYSERR);
|
|
}
|
|
|
|
return(p);
|
|
}
|
|
|
|
/*
|
|
* 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 *
|
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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_BADQUOTE, 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_EOLNSPACE, 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_NODATE, 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_BADDATE, parse, ln, pos, NULL);
|
|
t = 0;
|
|
}
|
|
out = t ? time2a(t) : NULL;
|
|
return(out ? out : mandoc_strdup(in));
|
|
}
|
|
|
|
int
|
|
mandoc_eos(const char *p, size_t sz, int enclosed)
|
|
{
|
|
const char *q;
|
|
int 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.
|
|
*/
|
|
|
|
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);
|
|
}
|