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/* $Id: libmdocml.c,v 1.18 2008/12/03 14:39:59 kristaps Exp $ */
/*
* 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 <fcntl.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libmdocml.h"
#include "private.h"
#define BUFFER_LINE BUFSIZ /* Default line-buffer size. */
static int md_run_enter(const struct md_args *,
struct md_mbuf *, struct md_rbuf *, void *);
static int md_run_leave(const struct md_args *, struct md_mbuf *,
struct md_rbuf *, int, void *);
static ssize_t md_buf_fill(struct md_rbuf *);
static int md_buf_flush(struct md_mbuf *);
static ssize_t
md_buf_fill(struct md_rbuf *in)
{
ssize_t ssz;
assert(in);
assert(in->buf);
assert(in->bufsz > 0);
assert(in->name);
if (-1 == (ssz = read(in->fd, in->buf, in->bufsz)))
warn("%s", in->name);
return(ssz);
}
static int md_buf_flush(struct md_mbuf *buf)
{
ssize_t sz;
assert(buf);
assert(buf->buf);
assert(buf->name);
if (0 == buf->pos)
return(1);
sz = write(buf->fd, buf->buf, buf->pos);
if (-1 == sz) {
warn("%s", buf->name);
return(0);
} else if ((size_t)sz != buf->pos) {
warnx("%s: short write", buf->name);
return(0);
}
buf->pos = 0;
return(1);
}
int
md_buf_putchar(struct md_mbuf *buf, char c)
{
assert(buf);
return(md_buf_puts(buf, &c, 1));
}
int
md_buf_putstring(struct md_mbuf *buf, const char *p)
{
assert(buf);
return(md_buf_puts(buf, p, strlen(p)));
}
int
md_buf_puts(struct md_mbuf *buf, const char *p, size_t sz)
{
size_t ssz;
assert(p);
assert(buf);
assert(buf->buf);
/* LINTED */
while (buf->pos + sz > buf->bufsz) {
ssz = buf->bufsz - buf->pos;
(void)memcpy(/* LINTED */
buf->buf + buf->pos, p, ssz);
p += (long)ssz;
sz -= ssz;
buf->pos += ssz;
if ( ! md_buf_flush(buf))
return(0);
}
(void)memcpy(/* LINTED */
buf->buf + buf->pos, p, sz);
buf->pos += sz;
return(1);
}
static int
md_run_leave(const struct md_args *args, struct md_mbuf *mbuf,
struct md_rbuf *rbuf, int c, void *data)
{
assert(args);
assert(mbuf);
assert(rbuf);
/* Run exiters. */
switch (args->type) {
case (MD_HTML):
if ( ! md_exit_html(data, -1 == c ? 0 : 1))
c = -1;
break;
default:
if ( ! md_exit_xml(data, -1 == c ? 0 : 1))
c = -1;
break;
}
/* Make final flush of buffer. */
if (-1 != c && ! md_buf_flush(mbuf))
return(-1);
return(c);
}
static int
md_run_enter(const struct md_args *args, struct md_mbuf *mbuf,
struct md_rbuf *rbuf, void *p)
{
ssize_t sz, i;
char line[BUFFER_LINE];
size_t pos;
md_line fp;
assert(args);
assert(mbuf);
assert(rbuf);
/* Function ptrs to line-parsers. */
switch (args->type) {
case (MD_HTML):
fp = md_line_html;
break;
default:
fp = md_line_xml;
break;
}
pos = 0;
again:
if (-1 == (sz = md_buf_fill(rbuf))) {
return(md_run_leave(args, mbuf, rbuf, -1, p));
} else if (0 == sz && 0 != pos) {
warnx("%s: no newline at end of file", rbuf->name);
return(md_run_leave(args, mbuf, rbuf, -1, p));
} else if (0 == sz)
return(md_run_leave(args, mbuf, rbuf, 0, p));
for (i = 0; i < sz; i++) {
/*
if ( ! isascii(rbuf->buf[i])) {
warnx("%s: non-ascii char (line %zu, col %zu)",
rbuf->name, rbuf->line, pos);
return(md_run_leave(args, mbuf, rbuf, -1, p));
}
*/
if ('\n' != rbuf->buf[i]) {
if (pos < BUFFER_LINE) {
/* LINTED */
line[pos++] = rbuf->buf[i];
continue;
}
warnx("%s: line %zu too long",
rbuf->name, rbuf->line);
return(md_run_leave(args, mbuf, rbuf, -1, p));
}
line[(int)pos] = 0;
if ( ! (*fp)(p, line))
return(md_run_leave(args, mbuf, rbuf, -1, p));
rbuf->line++;
pos = 0;
}
goto again;
/* NOTREACHED */
}
int
md_run(const struct md_args *args,
const struct md_buf *out, const struct md_buf *in)
{
struct md_mbuf mbuf;
struct md_rbuf rbuf;
void *data;
assert(args);
assert(in);
assert(out);
(void)memcpy(&mbuf, out, sizeof(struct md_buf));
(void)memcpy(&rbuf, in, sizeof(struct md_buf));
mbuf.pos = 0;
rbuf.line = 1;
/* Run initialisers. */
switch (args->type) {
case (MD_HTML):
data = md_init_html(args, &mbuf, &rbuf);
break;
default:
data = md_init_xml(args, &mbuf, &rbuf);
break;
}
/* Go into mainline. */
return(md_run_enter(args, &mbuf, &rbuf, data));
}
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