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/* $Id: mdocml.c,v 1.1.1.1 2008/11/22 14:53:29 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 <sys/param.h>
#include <sys/stat.h>
#include <assert.h>
#include <err.h>
#include <fcntl.h>
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "libmdocml.h"
struct md_file {
int fd;
const char *name;
};
struct md_buf {
struct md_file *file;
char *buf;
size_t bufsz;
size_t line;
};
static void usage(void);
static int md_begin(const char *, const char *);
static int md_begin_io(const char *, const char *);
static int md_begin_bufs(struct md_file *, struct md_file *);
static int md_run(struct md_buf *, struct md_buf *);
static int md_line(struct md_buf *, const struct md_buf *,
const char *, size_t);
static ssize_t md_buf_fill(struct md_buf *);
int
main(int argc, char *argv[])
{
int c;
char *out, *in;
extern char *optarg;
extern int optind;
out = NULL;
while (-1 != (c = getopt(argc, argv, "o:")))
switch (c) {
case ('o'):
out = optarg;
break;
default:
usage();
return(1);
}
argv += optind;
if (1 != (argc -= optind)) {
usage();
return(1);
}
argc--;
in = *argv++;
return(md_begin(out, in));
}
static int
md_begin(const char *out, const char *in)
{
char buf[MAXPATHLEN];
assert(in);
if (out)
return(md_begin_io(out, in));
if (strlcpy(buf, in, MAXPATHLEN) >= MAXPATHLEN)
warnx("output filename too long");
else if (strlcat(buf, ".html", MAXPATHLEN) >= MAXPATHLEN)
warnx("output filename too long");
else
return(md_begin_io(buf, in));
return(1);
}
static int
md_begin_io(const char *out, const char *in)
{
int c;
struct md_file fin, fout;
assert(out);
assert(in);
/* XXX: put an output file in TMPDIR and switch it out when the
* true file is ready to be written.
*/
fin.name = in;
if (-1 == (fin.fd = open(fin.name, O_RDONLY, 0))) {
warn("%s", fin.name);
return(1);
}
fout.name = out;
fout.fd = open(fout.name, O_WRONLY | O_CREAT | O_EXCL, 0644);
if (-1 == fout.fd) {
warn("%s", fout.name);
if (-1 == close(fin.fd))
warn("%s", fin.name);
return(1);
}
c = md_begin_bufs(&fout, &fin);
if (-1 == close(fin.fd)) {
warn("%s", in);
c = 1;
}
if (-1 == close(fout.fd)) {
warn("%s", out);
c = 1;
}
return(c);
}
static int
md_begin_bufs(struct md_file *out, struct md_file *in)
{
struct stat stin, stout;
struct md_buf inbuf, outbuf;
int c;
assert(in);
assert(out);
if (-1 == fstat(in->fd, &stin)) {
warn("fstat: %s", in->name);
return(1);
} else if (-1 == fstat(out->fd, &stout)) {
warn("fstat: %s", out->name);
return(1);
}
inbuf.file = in;
inbuf.line = 1;
inbuf.bufsz = MAX(stin.st_blksize, BUFSIZ);
outbuf.file = out;
outbuf.line = 1;
outbuf.bufsz = MAX(stout.st_blksize, BUFSIZ);
if (NULL == (inbuf.buf = malloc(inbuf.bufsz))) {
warn("malloc");
return(1);
} else if (NULL == (outbuf.buf = malloc(outbuf.bufsz))) {
warn("malloc");
free(inbuf.buf);
return(1);
}
c = md_run(&outbuf, &inbuf);
free(inbuf.buf);
free(outbuf.buf);
return(c);
}
static ssize_t
md_buf_fill(struct md_buf *in)
{
ssize_t ssz;
assert(in);
assert(in->file);
assert(in->buf);
assert(in->bufsz > 0);
assert(in->file->name);
if (-1 == (ssz = read(in->file->fd, in->buf, in->bufsz)))
warn("%s", in->file->name);
return(ssz);
}
static int
md_run(struct md_buf *out, struct md_buf *in)
{
ssize_t sz, i;
char line[BUFSIZ];
size_t pos;
assert(in);
assert(out);
/* LINTED */
for (pos = 0; ; ) {
if (-1 == (sz = md_buf_fill(in)))
return(1);
else if (0 == sz)
break;
for (i = 0; i < sz; i++) {
if ('\n' == in->buf[i]) {
if (md_line(out, in, line, pos))
return(1);
in->line++;
pos = 0;
continue;
}
if (pos < BUFSIZ) {
/* LINTED */
line[pos++] = in->buf[i];
continue;
}
warnx("%s: line %zu too long",
in->file->name, in->line);
return(1);
}
}
if (0 != pos)
return(md_line(out, in, line, pos));
return(0);
}
static int
md_line(struct md_buf *out, const struct md_buf *in,
const char *buf, size_t sz)
{
size_t i;
assert(buf);
assert(out);
assert(in);
for (i = 0; i < sz; i++)
(void)putchar(buf[i]);
(void)putchar('\n');
return(0);
}
static void
usage(void)
{
extern char *__progname;
(void)printf("usage: %s [-o outfile] infile\n", __progname);
}
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