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
|
/* $Id$ */
/*
* 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 <assert.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)
{
return(md_buf_puts(buf, &c, 1));
}
int
md_buf_putstring(struct md_mbuf *buf, const char *p)
{
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_HTML4_STRICT):
if ( ! md_exit_html4_strict(args, mbuf, rbuf, c, data))
return(-1);
break;
case (MD_DUMMY):
break;
default:
abort();
}
/* Make final flush of buffer. */
if ( ! 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_HTML4_STRICT):
fp = md_line_html4_strict;
break;
default:
fp = md_line_dummy;
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 ('\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));
}
if ( ! (*fp)(args, mbuf, rbuf, line, pos, p))
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;
data = NULL;
/* Run initialisers. */
switch (args->type) {
case (MD_HTML4_STRICT):
if ( ! md_init_html4_strict(args, &mbuf, &rbuf, &data))
return(-1);
break;
case (MD_DUMMY):
break;
default:
abort();
}
/* Go into mainline. */
return(md_run_enter(args, &mbuf, &rbuf, data));
}
|
