summaryrefslogtreecommitdiffstats
path: root/mdocml.c
blob: c55eff22686d7cfad1153293cb04c0dbe89d505a (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
/* $Id$ */
/*
 * 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 <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);
}