freebsd-skq/contrib/mdocml/mdoc.c

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/* $Id: mdoc.c,v 1.260 2017/02/16 03:00:23 schwarze Exp $ */
/*
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
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* Copyright (c) 2010, 2012-2017 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.
*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
* 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
* 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>
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#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
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#include "mandoc_aux.h"
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#include "mandoc.h"
#include "roff.h"
#include "mdoc.h"
#include "libmandoc.h"
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#include "roff_int.h"
#include "libmdoc.h"
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const char *const __mdoc_macronames[MDOC_MAX + 1] = {
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"text",
"Ap", "Dd", "Dt", "Os",
"Sh", "Ss", "Pp", "D1",
"Dl", "Bd", "Ed", "Bl",
"El", "It", "Ad", "An",
"Ar", "Cd", "Cm", "Dv",
"Er", "Ev", "Ex", "Fa",
"Fd", "Fl", "Fn", "Ft",
"Ic", "In", "Li", "Nd",
"Nm", "Op", "Ot", "Pa",
"Rv", "St", "Va", "Vt",
"Xr", "%A", "%B", "%D",
"%I", "%J", "%N", "%O",
"%P", "%R", "%T", "%V",
"Ac", "Ao", "Aq", "At",
"Bc", "Bf", "Bo", "Bq",
"Bsx", "Bx", "Db", "Dc",
"Do", "Dq", "Ec", "Ef",
"Em", "Eo", "Fx", "Ms",
"No", "Ns", "Nx", "Ox",
"Pc", "Pf", "Po", "Pq",
"Qc", "Ql", "Qo", "Qq",
"Re", "Rs", "Sc", "So",
"Sq", "Sm", "Sx", "Sy",
"Tn", "Ux", "Xc", "Xo",
"Fo", "Fc", "Oo", "Oc",
"Bk", "Ek", "Bt", "Hf",
"Fr", "Ud", "Lb", "Lp",
"Lk", "Mt", "Brq", "Bro",
"Brc", "%C", "Es", "En",
"Dx", "%Q", "br", "sp",
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"%U", "Ta", "ll",
};
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const char *const __mdoc_argnames[MDOC_ARG_MAX] = {
"split", "nosplit", "ragged",
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"unfilled", "literal", "file",
"offset", "bullet", "dash",
"hyphen", "item", "enum",
"tag", "diag", "hang",
"ohang", "inset", "column",
"width", "compact", "std",
"filled", "words", "emphasis",
"symbolic", "nested", "centered"
};
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const char * const *mdoc_macronames = __mdoc_macronames + 1;
const char * const *mdoc_argnames = __mdoc_argnames;
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static int mdoc_ptext(struct roff_man *, int, char *, int);
static int mdoc_pmacro(struct roff_man *, int, char *, int);
/*
* Main parse routine. Parses a single line -- really just hands off to
* the macro (mdoc_pmacro()) or text parser (mdoc_ptext()).
*/
int
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mdoc_parseln(struct roff_man *mdoc, int ln, char *buf, int offs)
{
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if (mdoc->last->type != ROFFT_EQN || ln > mdoc->last->line)
mdoc->flags |= MDOC_NEWLINE;
/*
* Let the roff nS register switch SYNOPSIS mode early,
* such that the parser knows at all times
* whether this mode is on or off.
* Note that this mode is also switched by the Sh macro.
*/
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if (roff_getreg(mdoc->roff, "nS"))
mdoc->flags |= MDOC_SYNOPSIS;
else
mdoc->flags &= ~MDOC_SYNOPSIS;
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return roff_getcontrol(mdoc->roff, buf, &offs) ?
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mdoc_pmacro(mdoc, ln, buf, offs) :
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mdoc_ptext(mdoc, ln, buf, offs);
}
void
mdoc_macro(MACRO_PROT_ARGS)
{
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assert(tok > TOKEN_NONE && tok < MDOC_MAX);
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(*mdoc_macros[tok].fp)(mdoc, tok, line, ppos, pos, buf);
}
void
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mdoc_tail_alloc(struct roff_man *mdoc, int line, int pos, int tok)
{
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struct roff_node *p;
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p = roff_node_alloc(mdoc, line, pos, ROFFT_TAIL, tok);
roff_node_append(mdoc, p);
mdoc->next = ROFF_NEXT_CHILD;
}
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struct roff_node *
mdoc_endbody_alloc(struct roff_man *mdoc, int line, int pos, int tok,
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struct roff_node *body)
{
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struct roff_node *p;
body->flags |= NODE_ENDED;
body->parent->flags |= NODE_ENDED;
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p = roff_node_alloc(mdoc, line, pos, ROFFT_BODY, tok);
p->body = body;
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p->norm = body->norm;
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p->end = ENDBODY_SPACE;
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roff_node_append(mdoc, p);
mdoc->next = ROFF_NEXT_SIBLING;
return p;
}
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struct roff_node *
mdoc_block_alloc(struct roff_man *mdoc, int line, int pos,
int tok, struct mdoc_arg *args)
{
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struct roff_node *p;
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p = roff_node_alloc(mdoc, line, pos, ROFFT_BLOCK, tok);
p->args = args;
if (p->args)
(args->refcnt)++;
switch (tok) {
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case MDOC_Bd:
case MDOC_Bf:
case MDOC_Bl:
case MDOC_En:
case MDOC_Rs:
p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
break;
default:
break;
}
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roff_node_append(mdoc, p);
mdoc->next = ROFF_NEXT_CHILD;
return p;
}
void
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mdoc_elem_alloc(struct roff_man *mdoc, int line, int pos,
int tok, struct mdoc_arg *args)
{
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struct roff_node *p;
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p = roff_node_alloc(mdoc, line, pos, ROFFT_ELEM, tok);
p->args = args;
if (p->args)
(args->refcnt)++;
switch (tok) {
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case MDOC_An:
p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
break;
default:
break;
}
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roff_node_append(mdoc, p);
mdoc->next = ROFF_NEXT_CHILD;
}
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void
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mdoc_node_relink(struct roff_man *mdoc, struct roff_node *p)
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{
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roff_node_unlink(mdoc, p);
p->prev = p->next = NULL;
roff_node_append(mdoc, p);
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}
/*
* Parse free-form text, that is, a line that does not begin with the
* control character.
*/
static int
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mdoc_ptext(struct roff_man *mdoc, int line, char *buf, int offs)
{
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struct roff_node *n;
char *c, *ws, *end;
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n = mdoc->last;
/*
* If a column list contains plain text, assume an implicit item
* macro. This can happen one or more times at the beginning
* of such a list, intermixed with non-It mdoc macros and with
* nodes generated on the roff level, for example by tbl.
*/
if ((n->tok == MDOC_Bl && n->type == ROFFT_BODY &&
n->end == ENDBODY_NOT && n->norm->Bl.type == LIST_column) ||
(n->parent != NULL && n->parent->tok == MDOC_Bl &&
n->parent->norm->Bl.type == LIST_column)) {
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mdoc->flags |= MDOC_FREECOL;
mdoc_macro(mdoc, MDOC_It, line, offs, &offs, buf);
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return 1;
}
/*
* Search for the beginning of unescaped trailing whitespace (ws)
* and for the first character not to be output (end).
*/
/* FIXME: replace with strcspn(). */
ws = NULL;
for (c = end = buf + offs; *c; c++) {
switch (*c) {
case ' ':
if (NULL == ws)
ws = c;
continue;
case '\t':
/*
* Always warn about trailing tabs,
* even outside literal context,
* where they should be put on the next line.
*/
if (NULL == ws)
ws = c;
/*
* Strip trailing tabs in literal context only;
* outside, they affect the next line.
*/
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if (MDOC_LITERAL & mdoc->flags)
continue;
break;
case '\\':
/* Skip the escaped character, too, if any. */
if (c[1])
c++;
/* FALLTHROUGH */
default:
ws = NULL;
break;
}
end = c + 1;
}
*end = '\0';
if (ws)
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mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
line, (int)(ws-buf), NULL);
if (buf[offs] == '\0' && ! (mdoc->flags & MDOC_LITERAL)) {
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mandoc_msg(MANDOCERR_FI_BLANK, mdoc->parse,
line, (int)(c - buf), NULL);
/*
* Insert a `sp' in the case of a blank line. Technically,
* blank lines aren't allowed, but enough manuals assume this
* behaviour that we want to work around it.
*/
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roff_elem_alloc(mdoc, line, offs, MDOC_sp);
mdoc->last->flags |= NODE_VALID | NODE_ENDED;
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mdoc->next = ROFF_NEXT_SIBLING;
return 1;
}
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roff_word_alloc(mdoc, line, offs, buf+offs);
if (mdoc->flags & MDOC_LITERAL)
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return 1;
/*
* End-of-sentence check. If the last character is an unescaped
* EOS character, then flag the node as being the end of a
* sentence. The front-end will know how to interpret this.
*/
assert(buf < end);
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if (mandoc_eos(buf+offs, (size_t)(end-buf-offs)))
mdoc->last->flags |= NODE_EOS;
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for (c = buf + offs; c != NULL; c = strchr(c + 1, '.')) {
if (c - buf < offs + 2)
continue;
if (end - c < 4)
break;
if (isalpha((unsigned char)c[-2]) &&
isalpha((unsigned char)c[-1]) &&
c[1] == ' ' &&
isupper((unsigned char)(c[2] == ' ' ? c[3] : c[2])) &&
(c[-2] != 'n' || c[-1] != 'c') &&
(c[-2] != 'v' || c[-1] != 's'))
mandoc_msg(MANDOCERR_EOS, mdoc->parse,
line, (int)(c - buf), NULL);
}
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return 1;
}
/*
* Parse a macro line, that is, a line beginning with the control
* character.
*/
static int
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mdoc_pmacro(struct roff_man *mdoc, int ln, char *buf, int offs)
{
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struct roff_node *n;
const char *cp;
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int tok;
int i, sv;
char mac[5];
sv = offs;
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/*
* Copy the first word into a nil-terminated buffer.
* Stop when a space, tab, escape, or eoln is encountered.
*/
i = 0;
while (i < 4 && strchr(" \t\\", buf[offs]) == NULL)
mac[i++] = buf[offs++];
mac[i] = '\0';
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tok = (i > 1 && i < 4) ? mdoc_hash_find(mac) : TOKEN_NONE;
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if (tok == TOKEN_NONE) {
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mandoc_msg(MANDOCERR_MACRO, mdoc->parse,
ln, sv, buf + sv - 1);
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return 1;
}
/* Skip a leading escape sequence or tab. */
switch (buf[offs]) {
case '\\':
cp = buf + offs + 1;
mandoc_escape(&cp, NULL, NULL);
offs = cp - buf;
break;
case '\t':
offs++;
break;
default:
break;
}
/* Jump to the next non-whitespace word. */
while (buf[offs] && ' ' == buf[offs])
offs++;
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/*
* Trailing whitespace. Note that tabs are allowed to be passed
* into the parser as "text", so we only warn about spaces here.
*/
if ('\0' == buf[offs] && ' ' == buf[offs - 1])
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mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
ln, offs - 1, NULL);
/*
* If an initial macro or a list invocation, divert directly
* into macro processing.
*/
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n = mdoc->last;
if (n == NULL || tok == MDOC_It || tok == MDOC_El) {
mdoc_macro(mdoc, tok, ln, sv, &offs, buf);
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return 1;
}
/*
* If a column list contains a non-It macro, assume an implicit
* item macro. This can happen one or more times at the
* beginning of such a list, intermixed with text lines and
* with nodes generated on the roff level, for example by tbl.
*/
if ((n->tok == MDOC_Bl && n->type == ROFFT_BODY &&
n->end == ENDBODY_NOT && n->norm->Bl.type == LIST_column) ||
(n->parent != NULL && n->parent->tok == MDOC_Bl &&
n->parent->norm->Bl.type == LIST_column)) {
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mdoc->flags |= MDOC_FREECOL;
mdoc_macro(mdoc, MDOC_It, ln, sv, &sv, buf);
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return 1;
}
/* Normal processing of a macro. */
mdoc_macro(mdoc, tok, ln, sv, &offs, buf);
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/* In quick mode (for mandocdb), abort after the NAME section. */
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if (mdoc->quick && MDOC_Sh == tok &&
SEC_NAME != mdoc->last->sec)
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return 2;
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return 1;
}
enum mdelim
mdoc_isdelim(const char *p)
{
if ('\0' == p[0])
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return DELIM_NONE;
if ('\0' == p[1])
switch (p[0]) {
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case '(':
case '[':
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return DELIM_OPEN;
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case '|':
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return DELIM_MIDDLE;
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case '.':
case ',':
case ';':
case ':':
case '?':
case '!':
case ')':
case ']':
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return DELIM_CLOSE;
default:
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return DELIM_NONE;
}
if ('\\' != p[0])
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return DELIM_NONE;
if (0 == strcmp(p + 1, "."))
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return DELIM_CLOSE;
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if (0 == strcmp(p + 1, "fR|\\fP"))
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return DELIM_MIDDLE;
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return DELIM_NONE;
}
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void
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mdoc_validate(struct roff_man *mdoc)
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{
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mdoc->last = mdoc->first;
mdoc_node_validate(mdoc);
mdoc_state_reset(mdoc);
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}