/* $Id$ */
/*
* Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@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 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 "libman.h"
const char *const __man_macronames[MAN_MAX] = {
"\\\"", "TH", "SH", "SS",
"TP", "LP", "PP", "P",
"IP", "HP", "SM", "SB",
"BI", "IB", "BR", "RB",
"R", "B", "I", "IR"
};
const char * const *man_macronames = __man_macronames;
static struct man_node *man_node_alloc(int, int, enum man_type);
static int man_node_append(struct man *,
struct man_node *);
static int man_ptext(struct man *, int, char *);
static int man_pmacro(struct man *, int, char *);
static void man_free1(struct man *);
static void man_alloc1(struct man *);
const struct man_node *
man_node(const struct man *m)
{
return(MAN_HALT & m->flags ? NULL : m->first);
}
const struct man_meta *
man_meta(const struct man *m)
{
return(MAN_HALT & m->flags ? NULL : &m->meta);
}
void
man_reset(struct man *man)
{
man_free1(man);
man_alloc1(man);
}
void
man_free(struct man *man)
{
man_free1(man);
if (man->htab)
man_hash_free(man->htab);
free(man);
}
struct man *
man_alloc(void)
{
struct man *p;
p = calloc(1, sizeof(struct man));
if (NULL == p)
err(1, "calloc");
man_alloc1(p);
p->htab = man_hash_alloc();
return(p);
}
int
man_endparse(struct man *m)
{
if (MAN_HALT & m->flags)
return(0);
else if (man_macroend(m))
return(1);
m->flags |= MAN_HALT;
return(0);
}
int
man_parseln(struct man *m, int ln, char *buf)
{
return('.' == *buf ?
man_pmacro(m, ln, buf) :
man_ptext(m, ln, buf));
}
static void
man_free1(struct man *man)
{
if (man->first)
man_node_freelist(man->first);
if (man->meta.title)
free(man->meta.title);
if (man->meta.os)
free(man->meta.os);
if (man->meta.vol)
free(man->meta.vol);
}
static void
man_alloc1(struct man *m)
{
bzero(&m->meta, sizeof(struct man_meta));
m->flags = 0;
m->last = calloc(1, sizeof(struct man_node));
if (NULL == m->last)
err(1, "calloc");
m->first = m->last;
m->last->type = MAN_ROOT;
m->next = MAN_NEXT_CHILD;
}
static int
man_node_append(struct man *man, struct man_node *p)
{
assert(man->last);
assert(man->first);
assert(MAN_ROOT != p->type);
switch (man->next) {
case (MAN_NEXT_SIBLING):
man->last->next = p;
p->prev = man->last;
p->parent = man->last->parent;
break;
case (MAN_NEXT_CHILD):
man->last->child = p;
p->parent = man->last;
break;
default:
abort();
/* NOTREACHED */
}
#if 0
if ( ! man_valid_pre(man, p))
return(0);
if ( ! man_action_pre(man, p))
return(0);
#endif
man->last = p;
switch (p->type) {
case (MAN_TEXT):
#if 0
if ( ! man_valid_post(man))
return(0);
if ( ! man_action_post(man))
return(0);
#endif
break;
default:
break;
}
return(1);
}
static struct man_node *
man_node_alloc(int line, int pos, enum man_type type)
{
struct man_node *p;
if (NULL == (p = calloc(1, sizeof(struct man_node))))
err(1, "malloc");
p->line = line;
p->pos = pos;
p->type = type;
return(p);
}
int
man_elem_alloc(struct man *man, int line, int pos, int tok)
{
struct man_node *p;
p = man_node_alloc(line, pos, MAN_ELEM);
p->tok = tok;
return(man_node_append(man, p));
}
int
man_word_alloc(struct man *man,
int line, int pos, const char *word)
{
struct man_node *p;
p = man_node_alloc(line, pos, MAN_TEXT);
if (NULL == (p->string = strdup(word)))
err(1, "strdup");
return(man_node_append(man, p));
}
void
man_node_free(struct man_node *p)
{
if (p->string)
free(p->string);
free(p);
}
void
man_node_freelist(struct man_node *p)
{
if (p->child)
man_node_freelist(p->child);
if (p->next)
man_node_freelist(p->next);
man_node_free(p);
}
static int
man_ptext(struct man *m, int line, char *buf)
{
if ( ! man_word_alloc(m, line, 0, buf))
return(0);
m->next = MAN_NEXT_SIBLING;
return(1);
}
int
man_pmacro(struct man *m, int ln, char *buf)
{
int i, c;
char mac[5];
/* Comments and empties are quickly ignored. */
if (0 == buf[1])
return(1);
if (' ' == buf[1]) {
i = 2;
while (buf[i] && ' ' == buf[i])
i++;
if (0 == buf[i])
return(1);
warnx("invalid syntax");
return(0);
}
if (buf[1] && '\\' == buf[1])
if (buf[2] && '\"' == buf[2])
return(1);
/* Copy the first word into a nil-terminated buffer. */
for (i = 1; i < 5; i++) {
if (0 == (mac[i - 1] = buf[i]))
break;
else if (' ' == buf[i])
break;
}
mac[i - 1] = 0;
if (i == 5 || i <= 1) {
warnx("unknown macro: %s", mac);
goto err;
}
if (MAN_MAX == (c = man_hash_find(m->htab, mac))) {
warnx("unknown macro: %s", mac);
goto err;
}
/* The macro is sane. Jump to the next word. */
while (buf[i] && ' ' == buf[i])
i++;
/* Begin recursive parse sequence. */
if ( ! man_macro(m, c, ln, 1, &i, buf))
goto err;
return(1);
err: /* Error out. */
m->flags |= MAN_HALT;
return(0);
}
