freebsd-dev/contrib/mdocml/mdoc_argv.c
Baptiste Daroussin 45c2cf11d2 Import mandoc snapshot 2017-06-08
It implements missing man(7) macros used in base by kerberos/ntp and makes them
supported by mandoc.

This import should have been done before the removal of groff.

Reported by:	gordon
2017-06-08 19:40:00 +00:00

679 lines
16 KiB
C

/* $Id: mdoc_argv.c,v 1.115 2017/05/30 16:22:03 schwarze Exp $ */
/*
* Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
* Copyright (c) 2012, 2014-2017 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.
*
* 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>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "mandoc_aux.h"
#include "mandoc.h"
#include "roff.h"
#include "mdoc.h"
#include "libmandoc.h"
#include "roff_int.h"
#include "libmdoc.h"
#define MULTI_STEP 5 /* pre-allocate argument values */
#define DELIMSZ 6 /* max possible size of a delimiter */
enum argsflag {
ARGSFL_NONE = 0,
ARGSFL_DELIM, /* handle delimiters of [[::delim::][ ]+]+ */
ARGSFL_TABSEP /* handle tab/`Ta' separated phrases */
};
enum argvflag {
ARGV_NONE, /* no args to flag (e.g., -split) */
ARGV_SINGLE, /* one arg to flag (e.g., -file xxx) */
ARGV_MULTI /* multiple args (e.g., -column xxx yyy) */
};
struct mdocarg {
enum argsflag flags;
const enum mdocargt *argvs;
};
static void argn_free(struct mdoc_arg *, int);
static enum margserr args(struct roff_man *, int, int *,
char *, enum argsflag, char **);
static int args_checkpunct(const char *, int);
static void argv_multi(struct roff_man *, int,
struct mdoc_argv *, int *, char *);
static void argv_single(struct roff_man *, int,
struct mdoc_argv *, int *, char *);
static const enum argvflag argvflags[MDOC_ARG_MAX] = {
ARGV_NONE, /* MDOC_Split */
ARGV_NONE, /* MDOC_Nosplit */
ARGV_NONE, /* MDOC_Ragged */
ARGV_NONE, /* MDOC_Unfilled */
ARGV_NONE, /* MDOC_Literal */
ARGV_SINGLE, /* MDOC_File */
ARGV_SINGLE, /* MDOC_Offset */
ARGV_NONE, /* MDOC_Bullet */
ARGV_NONE, /* MDOC_Dash */
ARGV_NONE, /* MDOC_Hyphen */
ARGV_NONE, /* MDOC_Item */
ARGV_NONE, /* MDOC_Enum */
ARGV_NONE, /* MDOC_Tag */
ARGV_NONE, /* MDOC_Diag */
ARGV_NONE, /* MDOC_Hang */
ARGV_NONE, /* MDOC_Ohang */
ARGV_NONE, /* MDOC_Inset */
ARGV_MULTI, /* MDOC_Column */
ARGV_SINGLE, /* MDOC_Width */
ARGV_NONE, /* MDOC_Compact */
ARGV_NONE, /* MDOC_Std */
ARGV_NONE, /* MDOC_Filled */
ARGV_NONE, /* MDOC_Words */
ARGV_NONE, /* MDOC_Emphasis */
ARGV_NONE, /* MDOC_Symbolic */
ARGV_NONE /* MDOC_Symbolic */
};
static const enum mdocargt args_Ex[] = {
MDOC_Std,
MDOC_ARG_MAX
};
static const enum mdocargt args_An[] = {
MDOC_Split,
MDOC_Nosplit,
MDOC_ARG_MAX
};
static const enum mdocargt args_Bd[] = {
MDOC_Ragged,
MDOC_Unfilled,
MDOC_Filled,
MDOC_Literal,
MDOC_File,
MDOC_Offset,
MDOC_Compact,
MDOC_Centred,
MDOC_ARG_MAX
};
static const enum mdocargt args_Bf[] = {
MDOC_Emphasis,
MDOC_Literal,
MDOC_Symbolic,
MDOC_ARG_MAX
};
static const enum mdocargt args_Bk[] = {
MDOC_Words,
MDOC_ARG_MAX
};
static const enum mdocargt args_Bl[] = {
MDOC_Bullet,
MDOC_Dash,
MDOC_Hyphen,
MDOC_Item,
MDOC_Enum,
MDOC_Tag,
MDOC_Diag,
MDOC_Hang,
MDOC_Ohang,
MDOC_Inset,
MDOC_Column,
MDOC_Width,
MDOC_Offset,
MDOC_Compact,
MDOC_Nested,
MDOC_ARG_MAX
};
static const struct mdocarg __mdocargs[MDOC_MAX - MDOC_Dd] = {
{ ARGSFL_NONE, NULL }, /* Dd */
{ ARGSFL_NONE, NULL }, /* Dt */
{ ARGSFL_NONE, NULL }, /* Os */
{ ARGSFL_NONE, NULL }, /* Sh */
{ ARGSFL_NONE, NULL }, /* Ss */
{ ARGSFL_NONE, NULL }, /* Pp */
{ ARGSFL_DELIM, NULL }, /* D1 */
{ ARGSFL_DELIM, NULL }, /* Dl */
{ ARGSFL_NONE, args_Bd }, /* Bd */
{ ARGSFL_NONE, NULL }, /* Ed */
{ ARGSFL_NONE, args_Bl }, /* Bl */
{ ARGSFL_NONE, NULL }, /* El */
{ ARGSFL_NONE, NULL }, /* It */
{ ARGSFL_DELIM, NULL }, /* Ad */
{ ARGSFL_DELIM, args_An }, /* An */
{ ARGSFL_DELIM, NULL }, /* Ap */
{ ARGSFL_DELIM, NULL }, /* Ar */
{ ARGSFL_DELIM, NULL }, /* Cd */
{ ARGSFL_DELIM, NULL }, /* Cm */
{ ARGSFL_DELIM, NULL }, /* Dv */
{ ARGSFL_DELIM, NULL }, /* Er */
{ ARGSFL_DELIM, NULL }, /* Ev */
{ ARGSFL_NONE, args_Ex }, /* Ex */
{ ARGSFL_DELIM, NULL }, /* Fa */
{ ARGSFL_NONE, NULL }, /* Fd */
{ ARGSFL_DELIM, NULL }, /* Fl */
{ ARGSFL_DELIM, NULL }, /* Fn */
{ ARGSFL_DELIM, NULL }, /* Ft */
{ ARGSFL_DELIM, NULL }, /* Ic */
{ ARGSFL_DELIM, NULL }, /* In */
{ ARGSFL_DELIM, NULL }, /* Li */
{ ARGSFL_NONE, NULL }, /* Nd */
{ ARGSFL_DELIM, NULL }, /* Nm */
{ ARGSFL_DELIM, NULL }, /* Op */
{ ARGSFL_DELIM, NULL }, /* Ot */
{ ARGSFL_DELIM, NULL }, /* Pa */
{ ARGSFL_NONE, args_Ex }, /* Rv */
{ ARGSFL_DELIM, NULL }, /* St */
{ ARGSFL_DELIM, NULL }, /* Va */
{ ARGSFL_DELIM, NULL }, /* Vt */
{ ARGSFL_DELIM, NULL }, /* Xr */
{ ARGSFL_NONE, NULL }, /* %A */
{ ARGSFL_NONE, NULL }, /* %B */
{ ARGSFL_NONE, NULL }, /* %D */
{ ARGSFL_NONE, NULL }, /* %I */
{ ARGSFL_NONE, NULL }, /* %J */
{ ARGSFL_NONE, NULL }, /* %N */
{ ARGSFL_NONE, NULL }, /* %O */
{ ARGSFL_NONE, NULL }, /* %P */
{ ARGSFL_NONE, NULL }, /* %R */
{ ARGSFL_NONE, NULL }, /* %T */
{ ARGSFL_NONE, NULL }, /* %V */
{ ARGSFL_DELIM, NULL }, /* Ac */
{ ARGSFL_NONE, NULL }, /* Ao */
{ ARGSFL_DELIM, NULL }, /* Aq */
{ ARGSFL_DELIM, NULL }, /* At */
{ ARGSFL_DELIM, NULL }, /* Bc */
{ ARGSFL_NONE, args_Bf }, /* Bf */
{ ARGSFL_NONE, NULL }, /* Bo */
{ ARGSFL_DELIM, NULL }, /* Bq */
{ ARGSFL_DELIM, NULL }, /* Bsx */
{ ARGSFL_DELIM, NULL }, /* Bx */
{ ARGSFL_NONE, NULL }, /* Db */
{ ARGSFL_DELIM, NULL }, /* Dc */
{ ARGSFL_NONE, NULL }, /* Do */
{ ARGSFL_DELIM, NULL }, /* Dq */
{ ARGSFL_DELIM, NULL }, /* Ec */
{ ARGSFL_NONE, NULL }, /* Ef */
{ ARGSFL_DELIM, NULL }, /* Em */
{ ARGSFL_NONE, NULL }, /* Eo */
{ ARGSFL_DELIM, NULL }, /* Fx */
{ ARGSFL_DELIM, NULL }, /* Ms */
{ ARGSFL_DELIM, NULL }, /* No */
{ ARGSFL_DELIM, NULL }, /* Ns */
{ ARGSFL_DELIM, NULL }, /* Nx */
{ ARGSFL_DELIM, NULL }, /* Ox */
{ ARGSFL_DELIM, NULL }, /* Pc */
{ ARGSFL_DELIM, NULL }, /* Pf */
{ ARGSFL_NONE, NULL }, /* Po */
{ ARGSFL_DELIM, NULL }, /* Pq */
{ ARGSFL_DELIM, NULL }, /* Qc */
{ ARGSFL_DELIM, NULL }, /* Ql */
{ ARGSFL_NONE, NULL }, /* Qo */
{ ARGSFL_DELIM, NULL }, /* Qq */
{ ARGSFL_NONE, NULL }, /* Re */
{ ARGSFL_NONE, NULL }, /* Rs */
{ ARGSFL_DELIM, NULL }, /* Sc */
{ ARGSFL_NONE, NULL }, /* So */
{ ARGSFL_DELIM, NULL }, /* Sq */
{ ARGSFL_NONE, NULL }, /* Sm */
{ ARGSFL_DELIM, NULL }, /* Sx */
{ ARGSFL_DELIM, NULL }, /* Sy */
{ ARGSFL_DELIM, NULL }, /* Tn */
{ ARGSFL_DELIM, NULL }, /* Ux */
{ ARGSFL_DELIM, NULL }, /* Xc */
{ ARGSFL_NONE, NULL }, /* Xo */
{ ARGSFL_NONE, NULL }, /* Fo */
{ ARGSFL_DELIM, NULL }, /* Fc */
{ ARGSFL_NONE, NULL }, /* Oo */
{ ARGSFL_DELIM, NULL }, /* Oc */
{ ARGSFL_NONE, args_Bk }, /* Bk */
{ ARGSFL_NONE, NULL }, /* Ek */
{ ARGSFL_NONE, NULL }, /* Bt */
{ ARGSFL_NONE, NULL }, /* Hf */
{ ARGSFL_DELIM, NULL }, /* Fr */
{ ARGSFL_NONE, NULL }, /* Ud */
{ ARGSFL_DELIM, NULL }, /* Lb */
{ ARGSFL_NONE, NULL }, /* Lp */
{ ARGSFL_DELIM, NULL }, /* Lk */
{ ARGSFL_DELIM, NULL }, /* Mt */
{ ARGSFL_DELIM, NULL }, /* Brq */
{ ARGSFL_NONE, NULL }, /* Bro */
{ ARGSFL_DELIM, NULL }, /* Brc */
{ ARGSFL_NONE, NULL }, /* %C */
{ ARGSFL_NONE, NULL }, /* Es */
{ ARGSFL_DELIM, NULL }, /* En */
{ ARGSFL_DELIM, NULL }, /* Dx */
{ ARGSFL_NONE, NULL }, /* %Q */
{ ARGSFL_NONE, NULL }, /* %U */
{ ARGSFL_NONE, NULL }, /* Ta */
};
static const struct mdocarg *const mdocargs = __mdocargs - MDOC_Dd;
/*
* Parse flags and their arguments from the input line.
* These come in the form -flag [argument ...].
* Some flags take no argument, some one, some multiple.
*/
void
mdoc_argv(struct roff_man *mdoc, int line, enum roff_tok tok,
struct mdoc_arg **reta, int *pos, char *buf)
{
struct mdoc_argv tmpv;
struct mdoc_argv **retv;
const enum mdocargt *argtable;
char *argname;
int ipos, retc;
char savechar;
*reta = NULL;
/* Which flags does this macro support? */
assert(tok >= MDOC_Dd && tok < MDOC_MAX);
argtable = mdocargs[tok].argvs;
if (argtable == NULL)
return;
/* Loop over the flags on the input line. */
ipos = *pos;
while (buf[ipos] == '-') {
/* Seek to the first unescaped space. */
for (argname = buf + ++ipos; buf[ipos] != '\0'; ipos++)
if (buf[ipos] == ' ' && buf[ipos - 1] != '\\')
break;
/*
* We want to nil-terminate the word to look it up.
* But we may not have a flag, in which case we need
* to restore the line as-is. So keep around the
* stray byte, which we'll reset upon exiting.
*/
if ((savechar = buf[ipos]) != '\0')
buf[ipos++] = '\0';
/*
* Now look up the word as a flag. Use temporary
* storage that we'll copy into the node's flags.
*/
while ((tmpv.arg = *argtable++) != MDOC_ARG_MAX)
if ( ! strcmp(argname, mdoc_argnames[tmpv.arg]))
break;
/* If it isn't a flag, restore the saved byte. */
if (tmpv.arg == MDOC_ARG_MAX) {
if (savechar != '\0')
buf[ipos - 1] = savechar;
break;
}
/* Read to the next word (the first argument). */
while (buf[ipos] == ' ')
ipos++;
/* Parse the arguments of the flag. */
tmpv.line = line;
tmpv.pos = *pos;
tmpv.sz = 0;
tmpv.value = NULL;
switch (argvflags[tmpv.arg]) {
case ARGV_SINGLE:
argv_single(mdoc, line, &tmpv, &ipos, buf);
break;
case ARGV_MULTI:
argv_multi(mdoc, line, &tmpv, &ipos, buf);
break;
case ARGV_NONE:
break;
}
/* Append to the return values. */
if (*reta == NULL)
*reta = mandoc_calloc(1, sizeof(**reta));
retc = ++(*reta)->argc;
retv = &(*reta)->argv;
*retv = mandoc_reallocarray(*retv, retc, sizeof(**retv));
memcpy(*retv + retc - 1, &tmpv, sizeof(**retv));
/* Prepare for parsing the next flag. */
*pos = ipos;
argtable = mdocargs[tok].argvs;
}
}
void
mdoc_argv_free(struct mdoc_arg *p)
{
int i;
if (NULL == p)
return;
if (p->refcnt) {
--(p->refcnt);
if (p->refcnt)
return;
}
assert(p->argc);
for (i = (int)p->argc - 1; i >= 0; i--)
argn_free(p, i);
free(p->argv);
free(p);
}
static void
argn_free(struct mdoc_arg *p, int iarg)
{
struct mdoc_argv *arg;
int j;
arg = &p->argv[iarg];
if (arg->sz && arg->value) {
for (j = (int)arg->sz - 1; j >= 0; j--)
free(arg->value[j]);
free(arg->value);
}
for (--p->argc; iarg < (int)p->argc; iarg++)
p->argv[iarg] = p->argv[iarg+1];
}
enum margserr
mdoc_args(struct roff_man *mdoc, int line, int *pos,
char *buf, enum roff_tok tok, char **v)
{
struct roff_node *n;
char *v_local;
enum argsflag fl;
if (v == NULL)
v = &v_local;
fl = tok == TOKEN_NONE ? ARGSFL_NONE : mdocargs[tok].flags;
/*
* We know that we're in an `It', so it's reasonable to expect
* us to be sitting in a `Bl'. Someday this may not be the case
* (if we allow random `It's sitting out there), so provide a
* safe fall-back into the default behaviour.
*/
if (tok == MDOC_It) {
for (n = mdoc->last; n != NULL; n = n->parent) {
if (n->tok != MDOC_Bl)
continue;
if (n->norm->Bl.type == LIST_column)
fl = ARGSFL_TABSEP;
break;
}
}
return args(mdoc, line, pos, buf, fl, v);
}
static enum margserr
args(struct roff_man *mdoc, int line, int *pos,
char *buf, enum argsflag fl, char **v)
{
char *p;
int pairs;
if (buf[*pos] == '\0') {
if (mdoc->flags & MDOC_PHRASELIT &&
! (mdoc->flags & MDOC_PHRASE)) {
mandoc_msg(MANDOCERR_ARG_QUOTE,
mdoc->parse, line, *pos, NULL);
mdoc->flags &= ~MDOC_PHRASELIT;
}
return ARGS_EOLN;
}
*v = buf + *pos;
if (fl == ARGSFL_DELIM && args_checkpunct(buf, *pos))
return ARGS_PUNCT;
/*
* Tabs in `It' lines in `Bl -column' can't be escaped.
* Phrases are reparsed for `Ta' and other macros later.
*/
if (fl == ARGSFL_TABSEP) {
if ((p = strchr(*v, '\t')) != NULL) {
/*
* Words right before and right after
* tab characters are not parsed,
* unless there is a blank in between.
*/
if (p > buf && p[-1] != ' ')
mdoc->flags |= MDOC_PHRASEQL;
if (p[1] != ' ')
mdoc->flags |= MDOC_PHRASEQN;
/*
* One or more blanks after a tab cause
* one leading blank in the next column.
* So skip all but one of them.
*/
*pos += (int)(p - *v) + 1;
while (buf[*pos] == ' ' && buf[*pos + 1] == ' ')
(*pos)++;
/*
* A tab at the end of an input line
* switches to the next column.
*/
if (buf[*pos] == '\0' || buf[*pos + 1] == '\0')
mdoc->flags |= MDOC_PHRASEQN;
} else {
p = strchr(*v, '\0');
if (p[-1] == ' ')
mandoc_msg(MANDOCERR_SPACE_EOL,
mdoc->parse, line, *pos, NULL);
*pos += (int)(p - *v);
}
/* Skip any trailing blank characters. */
while (p > *v && p[-1] == ' ' &&
(p - 1 == *v || p[-2] != '\\'))
p--;
*p = '\0';
return ARGS_PHRASE;
}
/*
* Process a quoted literal. A quote begins with a double-quote
* and ends with a double-quote NOT preceded by a double-quote.
* NUL-terminate the literal in place.
* Collapse pairs of quotes inside quoted literals.
* Whitespace is NOT involved in literal termination.
*/
if (mdoc->flags & MDOC_PHRASELIT || buf[*pos] == '\"') {
if ( ! (mdoc->flags & MDOC_PHRASELIT))
*v = &buf[++(*pos)];
if (mdoc->flags & MDOC_PHRASE)
mdoc->flags |= MDOC_PHRASELIT;
pairs = 0;
for ( ; buf[*pos]; (*pos)++) {
/* Move following text left after quoted quotes. */
if (pairs)
buf[*pos - pairs] = buf[*pos];
if ('\"' != buf[*pos])
continue;
/* Unquoted quotes end quoted args. */
if ('\"' != buf[*pos + 1])
break;
/* Quoted quotes collapse. */
pairs++;
(*pos)++;
}
if (pairs)
buf[*pos - pairs] = '\0';
if (buf[*pos] == '\0') {
if ( ! (mdoc->flags & MDOC_PHRASE))
mandoc_msg(MANDOCERR_ARG_QUOTE,
mdoc->parse, line, *pos, NULL);
return ARGS_WORD;
}
mdoc->flags &= ~MDOC_PHRASELIT;
buf[(*pos)++] = '\0';
if ('\0' == buf[*pos])
return ARGS_WORD;
while (' ' == buf[*pos])
(*pos)++;
if ('\0' == buf[*pos])
mandoc_msg(MANDOCERR_SPACE_EOL, mdoc->parse,
line, *pos, NULL);
return ARGS_WORD;
}
p = &buf[*pos];
*v = mandoc_getarg(mdoc->parse, &p, line, pos);
/*
* After parsing the last word in this phrase,
* tell lookup() whether or not to interpret it.
*/
if (*p == '\0' && mdoc->flags & MDOC_PHRASEQL) {
mdoc->flags &= ~MDOC_PHRASEQL;
mdoc->flags |= MDOC_PHRASEQF;
}
return ARGS_WORD;
}
/*
* Check if the string consists only of space-separated closing
* delimiters. This is a bit of a dance: the first must be a close
* delimiter, but it may be followed by middle delimiters. Arbitrary
* whitespace may separate these tokens.
*/
static int
args_checkpunct(const char *buf, int i)
{
int j;
char dbuf[DELIMSZ];
enum mdelim d;
/* First token must be a close-delimiter. */
for (j = 0; buf[i] && ' ' != buf[i] && j < DELIMSZ; j++, i++)
dbuf[j] = buf[i];
if (DELIMSZ == j)
return 0;
dbuf[j] = '\0';
if (DELIM_CLOSE != mdoc_isdelim(dbuf))
return 0;
while (' ' == buf[i])
i++;
/* Remaining must NOT be open/none. */
while (buf[i]) {
j = 0;
while (buf[i] && ' ' != buf[i] && j < DELIMSZ)
dbuf[j++] = buf[i++];
if (DELIMSZ == j)
return 0;
dbuf[j] = '\0';
d = mdoc_isdelim(dbuf);
if (DELIM_NONE == d || DELIM_OPEN == d)
return 0;
while (' ' == buf[i])
i++;
}
return '\0' == buf[i];
}
static void
argv_multi(struct roff_man *mdoc, int line,
struct mdoc_argv *v, int *pos, char *buf)
{
enum margserr ac;
char *p;
for (v->sz = 0; ; v->sz++) {
if (buf[*pos] == '-')
break;
ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
if (ac == ARGS_EOLN)
break;
if (v->sz % MULTI_STEP == 0)
v->value = mandoc_reallocarray(v->value,
v->sz + MULTI_STEP, sizeof(char *));
v->value[(int)v->sz] = mandoc_strdup(p);
}
}
static void
argv_single(struct roff_man *mdoc, int line,
struct mdoc_argv *v, int *pos, char *buf)
{
enum margserr ac;
char *p;
ac = args(mdoc, line, pos, buf, ARGSFL_NONE, &p);
if (ac == ARGS_EOLN)
return;
v->sz = 1;
v->value = mandoc_malloc(sizeof(char *));
v->value[0] = mandoc_strdup(p);
}