/* $Id$ */
/*
* 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 <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libmdoc.h"
enum merr {
ENOCALL,
EBODYPROL,
EPROLBODY,
ESPACE,
ETEXTPROL,
ENOBLANK,
EMALLOC
};
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", "Lb", "Ap",
"Lp", "Lk", "Mt", "Brq",
/* LINTED */
"Bro", "Brc", "\%C", "Es",
/* LINTED */
"En", "Dx", "\%Q"
};
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",
"filled", "words", "emphasis",
"symbolic", "nested"
};
const char * const *mdoc_macronames = __mdoc_macronames;
const char * const *mdoc_argnames = __mdoc_argnames;
static void mdoc_free1(struct mdoc *);
static int mdoc_alloc1(struct mdoc *);
static struct mdoc_node *node_alloc(struct mdoc *, int, int,
int, enum mdoc_type);
static int node_append(struct mdoc *,
struct mdoc_node *);
static int parsetext(struct mdoc *, int, char *);
static int parsemacro(struct mdoc *, int, char *);
static int macrowarn(struct mdoc *, int, const char *);
static int perr(struct mdoc *, int, int, enum merr);
#define verr(m, t) perr((m), (m)->last->line, (m)->last->pos, (t))
/*
* Get the first (root) node of the parse tree.
*/
const struct mdoc_node *
mdoc_node(const struct mdoc *m)
{
return(MDOC_HALT & m->flags ? NULL : m->first);
}
const struct mdoc_meta *
mdoc_meta(const struct mdoc *m)
{
return(MDOC_HALT & m->flags ? NULL : &m->meta);
}
static void
mdoc_free1(struct mdoc *mdoc)
{
if (mdoc->first)
mdoc_node_freelist(mdoc->first);
if (mdoc->meta.title)
free(mdoc->meta.title);
if (mdoc->meta.os)
free(mdoc->meta.os);
if (mdoc->meta.name)
free(mdoc->meta.name);
if (mdoc->meta.arch)
free(mdoc->meta.arch);
if (mdoc->meta.vol)
free(mdoc->meta.vol);
}
static int
mdoc_alloc1(struct mdoc *mdoc)
{
bzero(&mdoc->meta, sizeof(struct mdoc_meta));
mdoc->flags = 0;
mdoc->lastnamed = mdoc->lastsec = 0;
mdoc->last = calloc(1, sizeof(struct mdoc_node));
if (NULL == mdoc->last)
return(0);
mdoc->first = mdoc->last;
mdoc->last->type = MDOC_ROOT;
mdoc->next = MDOC_NEXT_CHILD;
return(1);
}
/*
* Free up all resources contributed by a parse: the node tree,
* meta-data and so on. Then reallocate the root node for another
* parse.
*/
int
mdoc_reset(struct mdoc *mdoc)
{
mdoc_free1(mdoc);
return(mdoc_alloc1(mdoc));
}
/*
* Completely free up all resources.
*/
void
mdoc_free(struct mdoc *mdoc)
{
mdoc_free1(mdoc);
if (mdoc->htab)
mdoc_hash_free(mdoc->htab);
free(mdoc);
}
struct mdoc *
mdoc_alloc(void *data, int pflags, const struct mdoc_cb *cb)
{
struct mdoc *p;
if (NULL == (p = calloc(1, sizeof(struct mdoc))))
return(NULL);
if (cb)
(void)memcpy(&p->cb, cb, sizeof(struct mdoc_cb));
p->data = data;
p->pflags = pflags;
if (NULL == (p->htab = mdoc_hash_alloc())) {
free(p);
return(NULL);
} else if (mdoc_alloc1(p))
return(p);
free(p);
return(NULL);
}
/*
* Climb back up the parse tree, validating open scopes. Mostly calls
* through to macro_end in macro.c.
*/
int
mdoc_endparse(struct mdoc *m)
{
if (MDOC_HALT & m->flags)
return(0);
else if (mdoc_macroend(m))
return(1);
m->flags |= MDOC_HALT;
return(0);
}
/*
* Main parse routine. Parses a single line -- really just hands off to
* the macro or text parser.
*/
int
mdoc_parseln(struct mdoc *m, int ln, char *buf)
{
/* If in error-mode, then we parse no more. */
if (MDOC_HALT & m->flags)
return(0);
return('.' == *buf ? parsemacro(m, ln, buf) :
parsetext(m, ln, buf));
}
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 *m, int tok,
int ln, int pp, int *pos, char *buf)
{
/* FIXME - these should happen during validation. */
if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
SEC_PROLOGUE != m->lastnamed)
return(perr(m, ln, pp, EPROLBODY));
if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
SEC_PROLOGUE == m->lastnamed)
return(perr(m, ln, pp, EBODYPROL));
if (1 != pp && ! (MDOC_CALLABLE & mdoc_macros[tok].flags))
return(perr(m, ln, pp, ENOCALL));
return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
}
static int
perr(struct mdoc *m, int line, int pos, enum merr type)
{
char *p;
p = NULL;
switch (type) {
case (ENOCALL):
p = "not callable";
break;
case (EPROLBODY):
p = "macro disallowed in document body";
break;
case (EBODYPROL):
p = "macro disallowed in document prologue";
break;
case (EMALLOC):
p = "memory exhausted";
break;
case (ETEXTPROL):
p = "text disallowed in document prologue";
break;
case (ENOBLANK):
p = "blank lines disallowed in non-literal contexts";
break;
case (ESPACE):
p = "whitespace disallowed after delimiter";
break;
}
assert(p);
return(mdoc_perr(m, line, pos, p));
}
static int
node_append(struct mdoc *mdoc, struct mdoc_node *p)
{
assert(mdoc->last);
assert(mdoc->first);
assert(MDOC_ROOT != p->type);
switch (mdoc->next) {
case (MDOC_NEXT_SIBLING):
mdoc->last->next = p;
p->prev = mdoc->last;
p->parent = mdoc->last->parent;
break;
case (MDOC_NEXT_CHILD):
mdoc->last->child = p;
p->parent = mdoc->last;
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->head = p;
break;
case (MDOC_TAIL):
assert(MDOC_BLOCK == p->parent->type);
p->parent->tail = p;
break;
case (MDOC_BODY):
assert(MDOC_BLOCK == p->parent->type);
p->parent->body = p;
break;
default:
break;
}
mdoc->last = p;
switch (p->type) {
case (MDOC_TEXT):
if ( ! mdoc_valid_post(mdoc))
return(0);
if ( ! mdoc_action_post(mdoc))
return(0);
break;
default:
break;
}
return(1);
}
static struct mdoc_node *
node_alloc(struct mdoc *mdoc, int line,
int pos, int tok, enum mdoc_type type)
{
struct mdoc_node *p;
if (NULL == (p = calloc(1, sizeof(struct mdoc_node)))) {
(void)verr(mdoc, EMALLOC);
return(NULL);
}
p->sec = mdoc->lastsec;
p->line = line;
p->pos = pos;
p->tok = tok;
if (MDOC_TEXT != (p->type = type))
assert(p->tok >= 0);
return(p);
}
int
mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, int tok)
{
struct mdoc_node *p;
p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
if (NULL == p)
return(0);
return(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 = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
if (NULL == p)
return(0);
return(node_append(mdoc, p));
}
int
mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, int tok)
{
struct mdoc_node *p;
p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
if (NULL == p)
return(0);
return(node_append(mdoc, p));
}
int
mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,
int tok, struct mdoc_arg *args)
{
struct mdoc_node *p;
p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);
if (NULL == p)
return(0);
if ((p->args = args))
(args->refcnt)++;
return(node_append(mdoc, p));
}
int
mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,
int tok, struct mdoc_arg *args)
{
struct mdoc_node *p;
p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);
if (NULL == p)
return(0);
if ((p->args = args))
(args->refcnt)++;
return(node_append(mdoc, p));
}
int
mdoc_word_alloc(struct mdoc *mdoc,
int line, int pos, const char *word)
{
struct mdoc_node *p;
p = node_alloc(mdoc, line, pos, -1, MDOC_TEXT);
if (NULL == p)
return(0);
if (NULL == (p->string = strdup(word))) {
(void)verr(mdoc, EMALLOC);
return(0);
}
return(node_append(mdoc, p));
}
void
mdoc_node_free(struct mdoc_node *p)
{
if (p->string)
free(p->string);
if (p->args)
mdoc_argv_free(p->args);
free(p);
}
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);
}
/*
* Parse free-form text, that is, a line that does not begin with the
* control character.
*/
static int
parsetext(struct mdoc *m, int line, char *buf)
{
if (SEC_PROLOGUE == m->lastnamed)
return(perr(m, line, 0, ETEXTPROL));
if (0 == buf[0] && ! (MDOC_LITERAL & m->flags))
return(perr(m, line, 0, ENOBLANK));
if ( ! mdoc_word_alloc(m, line, 0, buf))
return(0);
m->next = MDOC_NEXT_SIBLING;
return(1);
}
static int
macrowarn(struct mdoc *m, int ln, const char *buf)
{
if ( ! (MDOC_IGN_MACRO & m->pflags))
return(mdoc_perr(m, ln, 1,
"unknown macro: %s%s",
buf, strlen(buf) > 3 ? "..." : ""));
return(mdoc_pwarn(m, ln, 1, WARN_SYNTAX,
"unknown macro: %s%s",
buf, strlen(buf) > 3 ? "..." : ""));
}
/*
* Parse a macro line, that is, a line beginning with the control
* character.
*/
int
parsemacro(struct mdoc *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);
return(perr(m, ln, 1, ESPACE));
}
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 <= 2) {
if ( ! macrowarn(m, ln, mac))
goto err;
return(1);
}
if (MDOC_MAX == (c = mdoc_hash_find(m->htab, mac))) {
if ( ! macrowarn(m, ln, mac))
goto err;
return(1);
}
/* The macro is sane. Jump to the next word. */
while (buf[i] && ' ' == buf[i])
i++;
/* Begin recursive parse sequence. */
if ( ! mdoc_macro(m, c, ln, 1, &i, buf))
goto err;
return(1);
err: /* Error out. */
m->flags |= MDOC_HALT;
return(0);
}
