Commit | Line | Data |
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2340bcd3 JVH |
1 | #include <stdlib.h> |
2 | #include <stdio.h> | |
3 | #include <string.h> | |
4 | ||
5 | char * | |
6 | utils_strsep(char **stringp, const char *delim) | |
7 | { | |
8 | char *original; | |
9 | char *strptr; | |
10 | ||
11 | if (*stringp == NULL) { | |
12 | return NULL; | |
13 | } | |
14 | ||
15 | original = *stringp; | |
16 | strptr = strstr(*stringp, delim); | |
17 | if (strptr == NULL) { | |
18 | *stringp = NULL; | |
19 | return original; | |
20 | } | |
21 | *strptr = '\0'; | |
22 | *stringp = strptr+strlen(delim); | |
23 | return original; | |
24 | } | |
25 | ||
26 | int | |
27 | utils_read_file(char **dst, const char *filename) | |
28 | { | |
29 | FILE *stream; | |
30 | int filesize; | |
31 | char *buffer; | |
32 | int read_bytes; | |
33 | ||
34 | /* Open stream for reading */ | |
35 | stream = fopen(filename, "rb"); | |
36 | if (!stream) { | |
37 | return -1; | |
38 | } | |
39 | ||
40 | /* Find out file size */ | |
41 | fseek(stream, 0, SEEK_END); | |
42 | filesize = ftell(stream); | |
43 | fseek(stream, 0, SEEK_SET); | |
44 | ||
45 | /* Allocate one extra byte for zero */ | |
46 | buffer = malloc(filesize+1); | |
47 | if (!buffer) { | |
48 | fclose(stream); | |
49 | return -2; | |
50 | } | |
51 | ||
52 | /* Read data in a loop to buffer */ | |
53 | read_bytes = 0; | |
54 | do { | |
55 | int ret = fread(buffer+read_bytes, 1, | |
56 | filesize-read_bytes, stream); | |
57 | if (ret == 0) { | |
58 | break; | |
59 | } | |
60 | read_bytes += ret; | |
61 | } while (read_bytes < filesize); | |
62 | ||
63 | /* Add final null byte and close stream */ | |
64 | buffer[read_bytes] = '\0'; | |
65 | fclose(stream); | |
66 | ||
67 | /* If read didn't finish, return error */ | |
68 | if (read_bytes != filesize) { | |
69 | free(buffer); | |
70 | return -3; | |
71 | } | |
72 | ||
73 | /* Return buffer */ | |
74 | *dst = buffer; | |
75 | return filesize; | |
76 | } | |
77 | ||
78 | int | |
79 | utils_hwaddr_raop(char *str, int strlen, const char *hwaddr, int hwaddrlen) | |
80 | { | |
81 | int i,j; | |
82 | ||
83 | /* Check that our string is long enough */ | |
84 | if (strlen == 0 || strlen < 2*hwaddrlen+1) | |
85 | return -1; | |
86 | ||
87 | /* Convert hardware address to hex string */ | |
88 | for (i=0,j=0; i<hwaddrlen; i++) { | |
89 | int hi = (hwaddr[i]>>4) & 0x0f; | |
90 | int lo = hwaddr[i] & 0x0f; | |
91 | ||
92 | if (hi < 10) str[j++] = '0' + hi; | |
93 | else str[j++] = 'A' + hi-10; | |
94 | if (lo < 10) str[j++] = '0' + lo; | |
95 | else str[j++] = 'A' + lo-10; | |
96 | } | |
97 | ||
98 | /* Add string terminator */ | |
99 | str[j++] = '\0'; | |
100 | return j; | |
101 | } | |
102 | ||
103 | int | |
104 | utils_hwaddr_airplay(char *str, int strlen, const char *hwaddr, int hwaddrlen) | |
105 | { | |
106 | int i,j; | |
107 | ||
108 | /* Check that our string is long enough */ | |
109 | if (strlen == 0 || strlen < 2*hwaddrlen+hwaddrlen) | |
110 | return -1; | |
111 | ||
112 | /* Convert hardware address to hex string */ | |
113 | for (i=0,j=0; i<hwaddrlen; i++) { | |
114 | int hi = (hwaddr[i]>>4) & 0x0f; | |
115 | int lo = hwaddr[i] & 0x0f; | |
116 | ||
117 | if (hi < 10) str[j++] = '0' + hi; | |
118 | else str[j++] = 'a' + hi-10; | |
119 | if (lo < 10) str[j++] = '0' + lo; | |
120 | else str[j++] = 'a' + lo-10; | |
121 | ||
122 | str[j++] = ':'; | |
123 | } | |
124 | ||
125 | /* Add string terminator */ | |
126 | if (j != 0) j--; | |
127 | str[j++] = '\0'; | |
128 | return j; | |
129 | } | |
130 |