Fall back to IPv4 in case initializing IPv6 socket fails
[deb_shairplay.git] / src / lib / logger.c
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1/**
2 * Copyright (C) 2011-2012 Juho Vähä-Herttua
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 */
14
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15#include <stdlib.h>
16#include <stdio.h>
17#include <stdarg.h>
18#include <assert.h>
19
20#include "logger.h"
979533c3 21#include "compat.h"
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22
23void
24logger_init(logger_t *logger)
25{
26 assert(logger);
27
46212791 28 logger->level = LOGGER_DEBUG;
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29 logger->callback = NULL;
30}
31
32void
33logger_set_level(logger_t *logger, int level)
34{
35 assert(logger);
36
37 logger->level = level;
38}
39
40void
41logger_set_callback(logger_t *logger, logger_callback_t callback)
42{
43 assert(logger);
44
45 logger->callback = callback;
46}
47
48static char *
49logger_utf8_to_local(const char *str)
50{
51 char *ret = NULL;
52
53/* FIXME: This is only implemented on Windows for now */
54#if defined(_WIN32) || defined(_WIN64)
55 int wclen, mblen;
56 WCHAR *wcstr;
57 BOOL failed;
58
59 wclen = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0);
60 wcstr = malloc(sizeof(WCHAR) * wclen);
61 MultiByteToWideChar(CP_UTF8, 0, str, -1, wcstr, wclen);
62
63 mblen = WideCharToMultiByte(CP_ACP, 0, wcstr, wclen, NULL, 0, NULL, &failed);
64 if (failed) {
65 /* Invalid characters in input, conversion failed */
66 free(wcstr);
67 return NULL;
68 }
69
70 ret = malloc(sizeof(CHAR) * mblen);
71 WideCharToMultiByte(CP_ACP, 0, wcstr, wclen, ret, mblen, NULL, NULL);
72 free(wcstr);
73#endif
74
75 return ret;
76}
77
78void
79logger_log(logger_t *logger, int level, const char *fmt, ...)
80{
81 char buffer[4096];
82 va_list ap;
83
84 if (level > logger->level)
85 return;
86
87 buffer[sizeof(buffer)-1] = '\0';
88 va_start(ap, fmt);
89 vsnprintf(buffer, sizeof(buffer)-1, fmt, ap);
90 va_end(ap);
91
92 if (logger->callback) {
93 logger->callback(level, buffer);
94 } else {
95 char *local = logger_utf8_to_local(buffer);
96
97 if (local) {
46212791 98 fprintf(stderr, "%s\n", local);
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99 free(local);
100 } else {
46212791 101 fprintf(stderr, "%s\n", buffer);
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102 }
103 }
104}
105