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1 /*
2 * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
17 /*
18 * A streaming text/plain "parser."
19 */
21 #include <stdlib.h>
22 #include <string.h>
24 #include "telescope.h"
25 #include "parser.h"
27 static int textplain_parse(struct parser*, const char*, size_t);
28 static int textplain_foreach_line(struct parser*, const char*, size_t);
29 static int textplain_free(struct parser*);
31 static inline int
32 emit_line(struct parser *p, const char *line, size_t len)
33 {
34 struct line *l;
36 if ((l = calloc(1, sizeof(*l))) == NULL)
37 return 0;
39 l->type = LINE_TEXT;
41 if (len != 0) {
42 if ((l->line = calloc(1, len+1)) == NULL) {
43 free(l);
44 return 0;
45 }
47 memcpy(l->line, line, len);
48 }
50 TAILQ_INSERT_TAIL(&p->head, l, lines);
52 return 1;
53 }
55 void
56 textplain_initparser(struct parser *p)
57 {
58 memset(p, 0, sizeof(*p));
60 p->name = "text/plain";
61 p->parse = &textplain_parse;
62 p->free = &textplain_free;
64 TAILQ_INIT(&p->head);
65 }
67 static int
68 textplain_parse(struct parser *p, const char *buf, size_t size)
69 {
70 return parser_foreach_line(p, buf, size, textplain_foreach_line);
71 }
73 static int
74 textplain_foreach_line(struct parser *p, const char *line, size_t linelen)
75 {
76 return emit_line(p, line, linelen);
77 }
79 static int
80 textplain_free(struct parser *p)
81 {
82 if (p->len != 0)
83 return emit_line(p, p->buf, p->len);
84 return 1;
85 }