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  */
16 
17 #include "telescope.h"
18 
19 #include <ctype.h>
20 #include <errno.h>
21 #include <fcntl.h>
22 #include <stdlib.h>
23 #include <unistd.h>
24 
25 int
26 mark_nonblock(int fd)
27 {
28 	int flags;
29 
30 	if ((flags = fcntl(fd, F_GETFL)) == -1)
31                 return 0;
32 	if (fcntl(fd, F_SETFL, flags | O_NONBLOCK) == -1)
33                 return 0;
34 	return 1;
35 }
36 
37 int
38 has_prefix(const char *str, const char *prfx)
39 {
40 	size_t i;
41 
42 	for (i = 0; str[i] != '\0' && prfx[i] != '\0'; ++i)
43 		if (str[i] != prfx[i])
44 			return 0;
45 	return prfx[i] == '\0';
46 }
47 
48 int
49 unicode_isspace(uint32_t cp)
50 {
51 	if (cp < INT8_MAX)
52 		return isspace(cp);
53 	return 0;
54 }
55 
56 int
57 unicode_isgraph(uint32_t cp)
58 {
59 	if (cp < INT8_MAX)
60 		return isgraph(cp);
61 	return 1;
62 }
63 
64 void
65 dispatch_imsg(struct imsgbuf *ibuf, imsg_handlerfn **handlers, size_t size)
66 {
67 	struct imsg	imsg;
68 	size_t		datalen, i;
69 	ssize_t		n;
70 
71 	if ((n = imsg_read(ibuf)) == -1) {
72 		if (errno == EAGAIN || errno == EWOULDBLOCK)
73 			return;
74                 _exit(1);
75 	}
76 
77 	if (n == 0)
78 		_exit(1);
79 
80 	for (;;) {
81 		if ((n = imsg_get(ibuf, &imsg)) == -1)
82 			_exit(1);
83 		if (n == 0)
84 			return;
85 		datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
86 		i = imsg.hdr.type;
87 		if (i > (size / sizeof(imsg_handlerfn*)) || handlers[i] == NULL)
88 			abort();
89 		handlers[i](&imsg, datalen);
90 		imsg_free(&imsg);
91 	}
92 }