/* $Id$ */
/*
* Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
*
* 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 AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
* AUTHOR 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 <assert.h>
#include <ctype.h>
#include <err.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "private.h"
const char *const __mdoc_macronames[MDOC_MAX] = {
"\\\"", "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",
/* LINTED */
"Xr", "\%A", "\%B", "\%D",
/* LINTED */
"\%I", "\%J", "\%N", "\%O",
/* LINTED */
"\%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",
};
const char *const __mdoc_argnames[MDOC_ARG_MAX] = {
"split", "nosplit", "ragged",
"unfilled", "literal", "file",
"offset", "bullet", "dash",
"hyphen", "item", "enum",
"tag", "diag", "hang",
"ohang", "inset", "column",
"width", "compact", "std",
"p1003.1-88", "p1003.1-90", "p1003.1-96",
"p1003.1-2001", "p1003.1-2004", "p1003.1",
"p1003.1b", "p1003.1b-93", "p1003.1c-95",
"p1003.1g-2000", "p1003.2-92", "p1387.2-95",
"p1003.2", "p1387.2", "isoC-90",
"isoC-amd1", "isoC-tcor1", "isoC-tcor2",
"isoC-99", "ansiC", "ansiC-89",
"ansiC-99", "ieee754", "iso8802-3",
"xpg3", "xpg4", "xpg4.2",
"xpg4.3", "xbd5", "xcu5",
"xsh5", "xns5", "xns5.2d2.0",
"xcurses4.2", "susv2", "susv3",
"svid4", "filled", "words",
"emphasis", "symbolic",
};
const struct mdoc_macro __mdoc_macros[MDOC_MAX] = {
{ NULL, 0 }, /* \" */
{ macro_constant, MDOC_PROLOGUE }, /* Dd */
{ macro_constant, MDOC_PROLOGUE }, /* Dt */
{ macro_constant, MDOC_PROLOGUE }, /* Os */
{ macro_scoped, 0 }, /* Sh */
{ macro_scoped, 0 }, /* Ss */
{ macro_text, 0 }, /* Pp */
{ macro_scoped_line, MDOC_PARSED }, /* D1 */
{ macro_scoped_line, MDOC_PARSED }, /* Dl */
{ macro_scoped, MDOC_EXPLICIT }, /* Bd */
{ macro_scoped_close, MDOC_EXPLICIT }, /* Ed */
{ macro_scoped, MDOC_EXPLICIT }, /* Bl */
{ macro_scoped_close, MDOC_EXPLICIT }, /* El */
{ macro_scoped, MDOC_PARSED | MDOC_TABSEP}, /* It */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ad */
{ macro_text, MDOC_PARSED }, /* An */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ar */
{ macro_constant, MDOC_QUOTABLE }, /* Cd */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Cm */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Dv */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Er */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ev */
{ macro_constant, 0 }, /* Ex */
{ macro_text, MDOC_CALLABLE | MDOC_QUOTABLE | MDOC_PARSED }, /* Fa */
{ macro_constant, 0 }, /* Fd */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Fl */
{ macro_text, MDOC_CALLABLE | MDOC_QUOTABLE | MDOC_PARSED }, /* Fn */
{ macro_text, MDOC_PARSED | MDOC_QUOTABLE }, /* Ft */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Ic */
{ macro_constant, 0 }, /* In */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Li */
{ macro_constant, 0 }, /* Nd */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Nm */
{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Op */
{ macro_obsolete, 0 }, /* Ot */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Pa */
{ macro_constant, 0 }, /* Rv */
/* XXX - .St supposed to be (but isn't) callable. */
{ macro_constant_delimited, MDOC_PARSED }, /* St */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Va */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Vt */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Xr */
{ macro_constant, MDOC_QUOTABLE }, /* %A */
{ macro_constant, MDOC_QUOTABLE }, /* %B */
{ macro_constant, MDOC_QUOTABLE }, /* %D */
{ macro_constant, MDOC_QUOTABLE }, /* %I */
{ macro_constant, MDOC_QUOTABLE }, /* %J */
{ macro_constant, MDOC_QUOTABLE }, /* %N */
{ macro_constant, MDOC_QUOTABLE }, /* %O */
{ macro_constant, MDOC_QUOTABLE }, /* %P */
{ macro_constant, MDOC_QUOTABLE }, /* %R */
{ macro_constant, MDOC_QUOTABLE }, /* %T */
{ macro_constant, MDOC_QUOTABLE }, /* %V */
{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ac */
{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Ao */
{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Aq */
{ macro_constant, 0 }, /* At */
{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Bc */
{ macro_scoped, MDOC_EXPLICIT }, /* Bf */
{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Bo */
{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Bq */
{ macro_constant_delimited, MDOC_PARSED }, /* Bsx */
{ macro_constant_delimited, MDOC_PARSED }, /* Bx */
{ macro_constant, 0 }, /* Db */
{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Dc */
{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Do */
{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Dq */
{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Ec */
{ macro_scoped_close, MDOC_EXPLICIT }, /* Ef */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Em */
{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Eo */
{ macro_constant_delimited, MDOC_PARSED }, /* Fx */
{ macro_text, MDOC_PARSED }, /* Ms */
{ macro_constant_delimited, MDOC_CALLABLE | MDOC_PARSED }, /* No */
{ macro_constant_delimited, MDOC_CALLABLE | MDOC_PARSED }, /* Ns */
{ macro_constant_delimited, MDOC_PARSED }, /* Nx */
{ macro_constant_delimited, MDOC_PARSED }, /* Ox */
{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Pc */
{ macro_constant_delimited, MDOC_PARSED }, /* Pf */
{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Po */
{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Pq */
{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Qc */
{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Ql */
{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Qo */
{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Qq */
{ macro_scoped_close, MDOC_EXPLICIT }, /* Re */
{ macro_scoped, MDOC_EXPLICIT }, /* Rs */
{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Sc */
{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* So */
{ macro_scoped_line, MDOC_CALLABLE | MDOC_PARSED }, /* Sq */
{ macro_constant, 0 }, /* Sm */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Sx */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Sy */
{ macro_text, MDOC_CALLABLE | MDOC_PARSED }, /* Tn */
{ macro_constant_delimited, MDOC_PARSED }, /* Ux */
{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Xc */
{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Xo */
/* XXX - .Fo supposed to be (but isn't) callable. */
{ macro_scoped, MDOC_EXPLICIT | MDOC_PARSED }, /* Fo */
/* XXX - .Fc supposed to be (but isn't) callable. */
{ macro_scoped_close, MDOC_EXPLICIT | MDOC_PARSED }, /* Fc */
{ macro_constant_scoped, MDOC_CALLABLE | MDOC_PARSED | MDOC_EXPLICIT }, /* Oo */
{ macro_scoped_close, MDOC_EXPLICIT | MDOC_CALLABLE | MDOC_PARSED }, /* Oc */
{ macro_scoped, MDOC_EXPLICIT }, /* Bk */
{ macro_scoped_close, MDOC_EXPLICIT }, /* Ek */
{ macro_constant, 0 }, /* Bt */
{ macro_constant, 0 }, /* Hf */
{ macro_obsolete, 0 }, /* Fr */
{ macro_constant, 0 }, /* Ud */
};
const char * const *mdoc_macronames = __mdoc_macronames;
const char * const *mdoc_argnames = __mdoc_argnames;
const struct mdoc_macro * const mdoc_macros = __mdoc_macros;
static struct mdoc_arg *argdup(size_t, const struct mdoc_arg *);
static void argfree(size_t, struct mdoc_arg *);
static void argcpy(struct mdoc_arg *,
const struct mdoc_arg *);
static void mdoc_node_freelist(struct mdoc_node *);
static int mdoc_node_append(struct mdoc *,
struct mdoc_node *);
static void mdoc_elem_free(struct mdoc_elem *);
static void mdoc_text_free(struct mdoc_text *);
const struct mdoc_node *
mdoc_result(struct mdoc *mdoc)
{
return(mdoc->first);
}
void
mdoc_free(struct mdoc *mdoc)
{
if (mdoc->first)
mdoc_node_freelist(mdoc->first);
if (mdoc->htab)
mdoc_tokhash_free(mdoc->htab);
free(mdoc);
}
struct mdoc *
mdoc_alloc(void *data, const struct mdoc_cb *cb)
{
struct mdoc *p;
p = xcalloc(1, sizeof(struct mdoc));
p->data = data;
if (cb)
(void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
p->last = xcalloc(1, sizeof(struct mdoc_node));
p->last->type = MDOC_ROOT;
p->first = p->last;
p->next = MDOC_NEXT_CHILD;
p->htab = mdoc_tokhash_alloc();
return(p);
}
int
mdoc_endparse(struct mdoc *mdoc)
{
if (MDOC_HALT & mdoc->flags)
return(0);
if (NULL == mdoc->first)
return(1);
assert(mdoc->last);
if ( ! macro_end(mdoc)) {
mdoc->flags |= MDOC_HALT;
return(0);
}
return(1);
}
int
mdoc_parseln(struct mdoc *mdoc, int line, char *buf)
{
int c, i;
char tmp[5];
if (MDOC_HALT & mdoc->flags)
return(0);
if ('.' != *buf) {
if (SEC_PROLOGUE != mdoc->sec_lastn) {
if ( ! mdoc_word_alloc(mdoc, line, 0, buf))
return(0);
mdoc->next = MDOC_NEXT_SIBLING;
return(1);
}
return(mdoc_perr(mdoc, line, 0, "text disallowed"));
}
if (buf[1] && '\\' == buf[1])
if (buf[2] && '\"' == buf[2])
return(1);
i = 1;
while (buf[i] && ! isspace(buf[i]) && i < (int)sizeof(tmp))
i++;
if (i == (int)sizeof(tmp)) {
mdoc->flags |= MDOC_HALT;
return(mdoc_perr(mdoc, line, 1, "unknown macro"));
} else if (i <= 2) {
mdoc->flags |= MDOC_HALT;
return(mdoc_perr(mdoc, line, 1, "unknown macro"));
}
i--;
(void)memcpy(tmp, buf + 1, (size_t)i);
tmp[i++] = 0;
if (MDOC_MAX == (c = mdoc_find(mdoc, tmp))) {
mdoc->flags |= MDOC_HALT;
return(mdoc_perr(mdoc, line, 1, "unknown macro"));
}
while (buf[i] && isspace(buf[i]))
i++;
if ( ! mdoc_macro(mdoc, c, line, 1, &i, buf)) {
mdoc->flags |= MDOC_HALT;
return(0);
}
return(1);
}
void
mdoc_vmsg(struct mdoc *mdoc, int ln, int pos, const char *fmt, ...)
{
char buf[256];
va_list ap;
if (NULL == mdoc->cb.mdoc_msg)
return;
va_start(ap, fmt);
(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
va_end(ap);
(*mdoc->cb.mdoc_msg)(mdoc->data, ln, pos, buf);
}
int
mdoc_verr(struct mdoc *mdoc, int ln, int pos,
const char *fmt, ...)
{
char buf[256];
va_list ap;
if (NULL == mdoc->cb.mdoc_err)
return(0);
va_start(ap, fmt);
(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
va_end(ap);
return((*mdoc->cb.mdoc_err)(mdoc->data, ln, pos, buf));
}
int
mdoc_vwarn(struct mdoc *mdoc, int ln, int pos,
enum mdoc_warn type, const char *fmt, ...)
{
char buf[256];
va_list ap;
if (NULL == mdoc->cb.mdoc_warn)
return(0);
va_start(ap, fmt);
(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
va_end(ap);
return((*mdoc->cb.mdoc_warn)(mdoc->data, ln, pos, type, buf));
}
int
mdoc_macro(struct mdoc *mdoc, int tok,
int ln, int ppos, int *pos, char *buf)
{
assert(mdoc_macros[tok].fp);
if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
SEC_PROLOGUE == mdoc->sec_lastn)
return(mdoc_perr(mdoc, ln, ppos, "macro disallowed in document prologue"));
if (1 != ppos && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
return(mdoc_perr(mdoc, ln, ppos, "macro not callable"));
return((*mdoc_macros[tok].fp)(mdoc, tok, ln, ppos, pos, buf));
}
static int
mdoc_node_append(struct mdoc *mdoc, struct mdoc_node *p)
{
const char *nn, *nt, *on, *ot, *act;
assert(mdoc->last);
assert(mdoc->first);
assert(MDOC_ROOT != p->type);
if (MDOC_TEXT == mdoc->last->type)
on = "<text>";
else if (MDOC_ROOT == mdoc->last->type)
on = "<root>";
else
on = mdoc_macronames[mdoc->last->tok];
if (MDOC_TEXT == p->type)
nn = "<text>";
else if (MDOC_ROOT == p->type)
nn = "<root>";
else
nn = mdoc_macronames[p->tok];
ot = mdoc_type2a(mdoc->last->type);
nt = mdoc_type2a(p->type);
switch (mdoc->next) {
case (MDOC_NEXT_SIBLING):
mdoc->last->next = p;
p->prev = mdoc->last;
p->parent = mdoc->last->parent;
act = "sibling";
break;
case (MDOC_NEXT_CHILD):
mdoc->last->child = p;
p->parent = mdoc->last;
act = "child";
break;
default:
abort();
/* NOTREACHED */
}
if ( ! mdoc_valid_pre(mdoc, p))
return(0);
if ( ! mdoc_action_pre(mdoc, p))
return(0);
switch (p->type) {
case (MDOC_HEAD):
assert(MDOC_BLOCK == p->parent->type);
p->parent->data.block.head = p;
break;
case (MDOC_TAIL):
assert(MDOC_BLOCK == p->parent->type);
p->parent->data.block.tail = p;
break;
case (MDOC_BODY):
assert(MDOC_BLOCK == p->parent->type);
p->parent->data.block.body = p;
break;
default:
break;
}
mdoc->last = p;
mdoc_msg(mdoc, "parse: %s `%s' %s of %s `%s'",
nt, nn, act, ot, on);
return(1);
}
int
mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
{
struct mdoc_node *p;
assert(mdoc->first);
assert(mdoc->last);
p = xcalloc(1, sizeof(struct mdoc_node));
p->line = line;
p->pos = pos;
p->type = MDOC_TAIL;
p->tok = tok;
return(mdoc_node_append(mdoc, p));
}
int
mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, int tok)
{
struct mdoc_node *p;
assert(mdoc->first);
assert(mdoc->last);
p = xcalloc(1, sizeof(struct mdoc_node));
p->line = line;
p->pos = pos;
p->type = MDOC_HEAD;
p->tok = tok;
return(mdoc_node_append(mdoc, p));
}
int
mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
{
struct mdoc_node *p;
assert(mdoc->first);
assert(mdoc->last);
p = xcalloc(1, sizeof(struct mdoc_node));
p->line = line;
p->pos = pos;
p->type = MDOC_BODY;
p->tok = tok;
return(mdoc_node_append(mdoc, p));
}
int
mdoc_root_alloc(struct mdoc *mdoc)
{
struct mdoc_node *p;
p = xcalloc(1, sizeof(struct mdoc_node));
p->type = MDOC_ROOT;
return(mdoc_node_append(mdoc, p));
}
int
mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
int tok, size_t argsz, const struct mdoc_arg *args)
{
struct mdoc_node *p;
p = xcalloc(1, sizeof(struct mdoc_node));
p->pos = pos;
p->line = line;
p->type = MDOC_BLOCK;
p->tok = tok;
p->data.block.argc = argsz;
p->data.block.argv = argdup(argsz, args);
return(mdoc_node_append(mdoc, p));
}
int
mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
int tok, size_t argsz, const struct mdoc_arg *args)
{
struct mdoc_node *p;
p = xcalloc(1, sizeof(struct mdoc_node));
p->line = line;
p->pos = pos;
p->type = MDOC_ELEM;
p->tok = tok;
p->data.elem.argc = argsz;
p->data.elem.argv = argdup(argsz, args);
return(mdoc_node_append(mdoc, p));
}
int
mdoc_word_alloc(struct mdoc *mdoc,
int line, int pos, const char *word)
{
struct mdoc_node *p;
p = xcalloc(1, sizeof(struct mdoc_node));
p->line = line;
p->pos = pos;
p->type = MDOC_TEXT;
p->data.text.string = xstrdup(word);
return(mdoc_node_append(mdoc, p));
}
static void
argfree(size_t sz, struct mdoc_arg *p)
{
int i, j;
if (0 == sz)
return;
assert(p);
/* LINTED */
for (i = 0; i < (int)sz; i++)
if (p[i].sz > 0) {
assert(p[i].value);
/* LINTED */
for (j = 0; j < (int)p[i].sz; j++)
free(p[i].value[j]);
free(p[i].value);
}
free(p);
}
static void
mdoc_elem_free(struct mdoc_elem *p)
{
argfree(p->argc, p->argv);
}
static void
mdoc_block_free(struct mdoc_block *p)
{
argfree(p->argc, p->argv);
}
static void
mdoc_text_free(struct mdoc_text *p)
{
if (p->string)
free(p->string);
}
void
mdoc_node_free(struct mdoc_node *p)
{
switch (p->type) {
case (MDOC_TEXT):
mdoc_text_free(&p->data.text);
break;
case (MDOC_ELEM):
mdoc_elem_free(&p->data.elem);
break;
case (MDOC_BLOCK):
mdoc_block_free(&p->data.block);
break;
default:
break;
}
free(p);
}
static void
mdoc_node_freelist(struct mdoc_node *p)
{
if (p->child)
mdoc_node_freelist(p->child);
if (p->next)
mdoc_node_freelist(p->next);
mdoc_node_free(p);
}
int
mdoc_find(const struct mdoc *mdoc, const char *key)
{
return(mdoc_tokhash_find(mdoc->htab, key));
}
static void
argcpy(struct mdoc_arg *dst, const struct mdoc_arg *src)
{
int i;
dst->line = src->line;
dst->pos = src->pos;
dst->arg = src->arg;
if (0 == (dst->sz = src->sz))
return;
dst->value = xcalloc(dst->sz, sizeof(char *));
for (i = 0; i < (int)dst->sz; i++)
dst->value[i] = xstrdup(src->value[i]);
}
static struct mdoc_arg *
argdup(size_t argsz, const struct mdoc_arg *args)
{
struct mdoc_arg *pp;
int i;
if (0 == argsz)
return(NULL);
pp = xcalloc((size_t)argsz, sizeof(struct mdoc_arg));
for (i = 0; i < (int)argsz; i++)
argcpy(&pp[i], &args[i]);
return(pp);
}
