src/SDL_log.c
author Sam Lantinga <slouken@libsdl.org>
Mon, 07 Feb 2011 20:05:52 -0800
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child 5235 1e28342cb15d
permissions -rwxr-xr-x
Fixed stack overflow on Windows
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2010 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/* Simple log messages in SDL */
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#include "SDL_log.h"
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#if HAVE_STDIO_H
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#include <stdio.h>
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#endif
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#if defined(__WIN32__)
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#include "core/windows/SDL_windows.h"
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#elif defined(__ANDROID__)
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#include <android/log.h>
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#endif
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#define DEFAULT_PRIORITY                SDL_LOG_PRIORITY_CRITICAL
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#define DEFAULT_APPLICATION_PRIORITY    SDL_LOG_PRIORITY_INFO
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typedef struct SDL_LogLevel
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{
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    int category;
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    SDL_LogPriority priority;
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    struct SDL_LogLevel *next;
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} SDL_LogLevel;
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static SDL_LogLevel *SDL_loglevels;
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static SDL_LogPriority SDL_application_priority = DEFAULT_APPLICATION_PRIORITY;
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static SDL_LogPriority SDL_default_priority = DEFAULT_PRIORITY;
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static const char *SDL_priority_prefixes[SDL_NUM_LOG_PRIORITIES] = {
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    "VERBOSE",
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    "DEBUG",
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    "INFO",
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    "WARN",
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    "ERROR",
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    "CRITICAL"
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};
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#ifdef __ANDROID__
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static const char *SDL_category_prefixes[SDL_LOG_CATEGORY_RESERVED1] = {
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    "APP",
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    "ERROR",
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    "SYSTEM",
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    "AUDIO",
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    "VIDEO",
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    "RENDER",
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    "INPUT"
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};
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static int SDL_android_priority[SDL_NUM_LOG_PRIORITIES] = {
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    ANDROID_LOG_VERBOSE,
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    ANDROID_LOG_DEBUG,
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    ANDROID_LOG_INFO,
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    ANDROID_LOG_WARN,
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    ANDROID_LOG_ERROR,
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    ANDROID_LOG_FATAL
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};
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#endif /* __ANDROID__ */
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void
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SDL_LogSetAllPriority(SDL_LogPriority priority)
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{
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    SDL_LogLevel *entry;
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    for (entry = SDL_loglevels; entry; entry = entry->next) {
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        entry->priority = priority;
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    }
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    SDL_application_priority = SDL_default_priority = priority;
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}
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void
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SDL_LogSetPriority(int category, SDL_LogPriority priority)
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{
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    SDL_LogLevel *entry;
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    for (entry = SDL_loglevels; entry; entry = entry->next) {
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        if (entry->category == category) {
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            entry->priority = priority;
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            return;
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        }
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    }
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    /* Create a new entry */
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    entry = (SDL_LogLevel *)SDL_malloc(sizeof(*entry));
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    if (entry) {
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        entry->category = category;
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        entry->priority = priority;
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        entry->next = SDL_loglevels;
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        SDL_loglevels = entry;
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    }
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}
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SDL_LogPriority
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SDL_LogGetPriority(int category)
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{
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    SDL_LogLevel *entry;
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    for (entry = SDL_loglevels; entry; entry = entry->next) {
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        if (entry->category == category) {
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            return entry->priority;
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        }
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    }
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    if (category == SDL_LOG_CATEGORY_APPLICATION) {
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        return SDL_application_priority;
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    } else {
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        return SDL_default_priority;
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    }
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}
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void
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SDL_LogResetPriorities(void)
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{
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    SDL_LogLevel *entry;
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    while (SDL_loglevels) {
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        entry = SDL_loglevels;
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        SDL_loglevels = entry->next;
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        SDL_free(entry);
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    }
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    SDL_application_priority = DEFAULT_APPLICATION_PRIORITY;
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    SDL_default_priority = DEFAULT_PRIORITY;
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}
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void
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SDL_Log(const char *fmt, ...)
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{
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    va_list ap;
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    va_start(ap, fmt);
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    SDL_LogMessageV(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_INFO, fmt, ap);
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    va_end(ap);
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}
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void
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SDL_LogVerbose(int category, const char *fmt, ...)
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{
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    va_list ap;
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    va_start(ap, fmt);
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    SDL_LogMessageV(category, SDL_LOG_PRIORITY_VERBOSE, fmt, ap);
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    va_end(ap);
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}
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void
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SDL_LogInfo(int category, const char *fmt, ...)
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{
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    va_list ap;
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    va_start(ap, fmt);
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    SDL_LogMessageV(category, SDL_LOG_PRIORITY_INFO, fmt, ap);
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    va_end(ap);
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}
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void
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SDL_LogWarn(int category, const char *fmt, ...)
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{
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    va_list ap;
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    va_start(ap, fmt);
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    SDL_LogMessageV(category, SDL_LOG_PRIORITY_WARN, fmt, ap);
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    va_end(ap);
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}
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void
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SDL_LogError(int category, const char *fmt, ...)
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{
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    va_list ap;
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    va_start(ap, fmt);
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    SDL_LogMessageV(category, SDL_LOG_PRIORITY_ERROR, fmt, ap);
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    va_end(ap);
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}
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void
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SDL_LogCritical(int category, const char *fmt, ...)
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{
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    va_list ap;
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    va_start(ap, fmt);
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    SDL_LogMessageV(category, SDL_LOG_PRIORITY_CRITICAL, fmt, ap);
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    va_end(ap);
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}
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void
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SDL_LogMessage(int category, SDL_LogPriority priority, const char *fmt, ...)
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{
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    va_list ap;
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    va_start(ap, fmt);
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    SDL_LogMessageV(category, priority, fmt, ap);
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    va_end(ap);
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}
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#ifdef __ANDROID__
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static const char *
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GetCategoryPrefix(int category)
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{
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    if (category < SDL_LOG_CATEGORY_RESERVED1) {
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        return SDL_category_prefixes[category];
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    }
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    if (category < SDL_LOG_CATEGORY_CUSTOM) {
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        return "RESERVED";
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    }
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    return "CUSTOM";
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}
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#endif /* __ANDROID__ */
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void
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SDL_LogMessageV(int category, SDL_LogPriority priority, const char *fmt, va_list ap)
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{
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    char *message;
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    /* Make sure we don't exceed array bounds */
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    if (priority < 0 || priority >= SDL_NUM_LOG_PRIORITIES) {
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        return;
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    }
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    /* See if we want to do anything with this message */
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    if (priority < SDL_LogGetPriority(category)) {
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        return;
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    }
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    message = SDL_stack_alloc(char, SDL_MAX_LOG_MESSAGE);
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    if (!message) {
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        return;
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    }
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    SDL_vsnprintf(message, SDL_MAX_LOG_MESSAGE, fmt, ap);
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#if defined(__WIN32__)
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    /* Way too many allocations here, urgh */
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    {
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        char *output;
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        size_t length;
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        LPTSTR tstr;
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        length = SDL_strlen(SDL_priority_prefixes[priority]) + 2 + SDL_strlen(message) + 1;
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        output = SDL_stack_alloc(char, length);
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        SDL_snprintf(output, length, "%s: %s", SDL_priority_prefixes[priority], message);
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        tstr = WIN_UTF8ToString(output);
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        OutputDebugString(tstr);
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        SDL_free(tstr);
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        SDL_stack_free(output);
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    }
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#elif defined(__ANDROID__)
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    {
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        char tag[32];
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        SDL_snprintf(tag, SDL_arraysize(tag), "SDL/%s", GetCategoryPrefix(category));
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        __android_log_write(SDL_android_priority[priority], tag, message);
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    }
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#endif
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#if HAVE_STDIO_H
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    fprintf(stderr, "%s: %s\n", SDL_priority_prefixes[priority], message);
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#endif
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    SDL_stack_free(message);
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}
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/* vi: set ts=4 sw=4 expandtab: */