| 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 | |
| 15 | #include <stdlib.h> |
| 16 | #include <stdio.h> |
| 17 | #include <stdarg.h> |
| 18 | #include <assert.h> |
| 19 | |
| 20 | #include "logger.h" |
| 21 | #include "compat.h" |
| 22 | |
| 23 | struct logger_s { |
| 24 | mutex_handle_t lvl_mutex; |
| 25 | mutex_handle_t cb_mutex; |
| 26 | |
| 27 | int level; |
| 28 | void *cls; |
| 29 | logger_callback_t callback; |
| 30 | }; |
| 31 | |
| 32 | logger_t * |
| 33 | logger_init() |
| 34 | { |
| 35 | logger_t *logger = calloc(1, sizeof(logger_t)); |
| 36 | assert(logger); |
| 37 | |
| 38 | MUTEX_CREATE(logger->lvl_mutex); |
| 39 | MUTEX_CREATE(logger->cb_mutex); |
| 40 | |
| 41 | logger->level = LOGGER_WARNING; |
| 42 | logger->callback = NULL; |
| 43 | return logger; |
| 44 | } |
| 45 | |
| 46 | void |
| 47 | logger_destroy(logger_t *logger) |
| 48 | { |
| 49 | MUTEX_DESTROY(logger->lvl_mutex); |
| 50 | MUTEX_DESTROY(logger->cb_mutex); |
| 51 | free(logger); |
| 52 | } |
| 53 | |
| 54 | void |
| 55 | logger_set_level(logger_t *logger, int level) |
| 56 | { |
| 57 | assert(logger); |
| 58 | |
| 59 | MUTEX_LOCK(logger->lvl_mutex); |
| 60 | logger->level = level; |
| 61 | MUTEX_UNLOCK(logger->lvl_mutex); |
| 62 | } |
| 63 | |
| 64 | void |
| 65 | logger_set_callback(logger_t *logger, logger_callback_t callback, void *cls) |
| 66 | { |
| 67 | assert(logger); |
| 68 | |
| 69 | MUTEX_LOCK(logger->cb_mutex); |
| 70 | logger->cls = cls; |
| 71 | logger->callback = callback; |
| 72 | MUTEX_UNLOCK(logger->cb_mutex); |
| 73 | } |
| 74 | |
| 75 | static char * |
| 76 | logger_utf8_to_local(const char *str) |
| 77 | { |
| 78 | char *ret = NULL; |
| 79 | |
| 80 | /* FIXME: This is only implemented on Windows for now */ |
| 81 | #if defined(_WIN32) || defined(_WIN64) |
| 82 | int wclen, mblen; |
| 83 | WCHAR *wcstr; |
| 84 | BOOL failed; |
| 85 | |
| 86 | wclen = MultiByteToWideChar(CP_UTF8, 0, str, -1, NULL, 0); |
| 87 | wcstr = malloc(sizeof(WCHAR) * wclen); |
| 88 | MultiByteToWideChar(CP_UTF8, 0, str, -1, wcstr, wclen); |
| 89 | |
| 90 | mblen = WideCharToMultiByte(CP_ACP, 0, wcstr, wclen, NULL, 0, NULL, &failed); |
| 91 | if (failed) { |
| 92 | /* Invalid characters in input, conversion failed */ |
| 93 | free(wcstr); |
| 94 | return NULL; |
| 95 | } |
| 96 | |
| 97 | ret = malloc(sizeof(CHAR) * mblen); |
| 98 | WideCharToMultiByte(CP_ACP, 0, wcstr, wclen, ret, mblen, NULL, NULL); |
| 99 | free(wcstr); |
| 100 | #endif |
| 101 | |
| 102 | return ret; |
| 103 | } |
| 104 | |
| 105 | void |
| 106 | logger_log(logger_t *logger, int level, const char *fmt, ...) |
| 107 | { |
| 108 | char buffer[4096]; |
| 109 | va_list ap; |
| 110 | |
| 111 | MUTEX_LOCK(logger->lvl_mutex); |
| 112 | if (level > logger->level) { |
| 113 | MUTEX_UNLOCK(logger->lvl_mutex); |
| 114 | return; |
| 115 | } |
| 116 | MUTEX_UNLOCK(logger->lvl_mutex); |
| 117 | |
| 118 | buffer[sizeof(buffer)-1] = '\0'; |
| 119 | va_start(ap, fmt); |
| 120 | vsnprintf(buffer, sizeof(buffer)-1, fmt, ap); |
| 121 | va_end(ap); |
| 122 | |
| 123 | MUTEX_LOCK(logger->cb_mutex); |
| 124 | if (logger->callback) { |
| 125 | logger->callback(logger->cls, level, buffer); |
| 126 | MUTEX_UNLOCK(logger->cb_mutex); |
| 127 | } else { |
| 128 | char *local; |
| 129 | MUTEX_UNLOCK(logger->cb_mutex); |
| 130 | local = logger_utf8_to_local(buffer); |
| 131 | if (local) { |
| 132 | fprintf(stderr, "%s\n", local); |
| 133 | free(local); |
| 134 | } else { |
| 135 | fprintf(stderr, "%s\n", buffer); |
| 136 | } |
| 137 | } |
| 138 | } |
| 139 | |