| 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 | |