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
|
/* See LICENSE file for copyright and license details. */
#include "common.h"
/**
* List all available CRTC:s, receive response part
*
* @param ctx The state of the library, must be connected
* @param async Information about the request
* @return A `NULL`-terminated list of names. You should only free
* the outer pointer, inner pointers are subpointers of the
* outer pointer and cannot be freed. `NULL` on error, in
* which case `ctx->error` (rather than `errno`) is read
* for information about the error.
*/
char **
libcoopgamma_get_crtcs_recv(libcoopgamma_context_t *restrict ctx, libcoopgamma_async_context_t *restrict async)
{
char *line;
char *payload;
char *end;
int command_ok = 0;
size_t i, n, lines, len, length;
char **rc;
if (libcoopgamma_check_error__(ctx, async))
return NULL;
for (;;) {
line = libcoopgamma_next_header__(ctx);
if (!*line)
break;
else if (!strcmp(line, "Command: crtc-enumeration"))
command_ok = 1;
}
payload = libcoopgamma_next_payload__(ctx, &n);
if (!command_ok || (n > 0 && payload[n - 1U] != '\n')) {
errno = EBADMSG;
copy_errno(ctx);
return NULL;
}
line = payload;
end = &payload[n];
lines = length = 0;
while (line != end) {
lines += 1U;
length += len = (size_t)(&strchr(line, '\n')[1U] - line);
line += len;
line[-1] = '\0';
}
rc = malloc((lines + 1U) * sizeof(char *) + length);
if (!rc) {
copy_errno(ctx);
return NULL;
}
line = ((char *)rc) + (lines + 1U) * sizeof(char *);
memcpy(line, payload, length);
rc[lines] = NULL;
for (i = 0; i < lines; i++) {
rc[i] = line;
line = &strchr(line, '\0')[1U];
}
return rc;
}
|
