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/**************************************************************************
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* Copyright 2008 VMware, Inc.
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* Copyright 2009-2010 Chia-I Wu <olvaffe@gmail.com>
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* Copyright 2010 LunarG, Inc.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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**************************************************************************/
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* Logging facility for debug/info messages.
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* _EGL_FATAL messages are printed to stderr
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* The EGL_LOG_LEVEL var controls the output of other warning/info/debug msgs.
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#include "c11/threads.h"
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#include "util/macros.h"
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#include "util/u_string.h"
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#ifdef HAVE_ANDROID_PLATFORM
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#define LOG_TAG "EGL-MAIN"
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#if ANDROID_API_LEVEL >= 26
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#include <cutils/log.h>
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#endif /* use log/log.h start from android 8 major version */
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#endif /* HAVE_ANDROID_PLATFORM */
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#define MAXSTRING 1000
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#define FALLBACK_LOG_LEVEL _EGL_WARNING
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EGLBoolean initialized;
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.mutex = _MTX_INITIALIZER_NP,
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.initialized = EGL_FALSE,
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.level = FALLBACK_LOG_LEVEL,
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static const char *level_strings[] = {
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[_EGL_FATAL] = "fatal",
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[_EGL_WARNING] = "warning",
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[_EGL_DEBUG] = "debug",
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* The default logger. It prints the message to stderr.
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_eglDefaultLogger(EGLint level, const char *msg)
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#ifdef HAVE_ANDROID_PLATFORM
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static const int egl2alog[] = {
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[_EGL_FATAL] = ANDROID_LOG_ERROR,
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[_EGL_WARNING] = ANDROID_LOG_WARN,
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[_EGL_INFO] = ANDROID_LOG_INFO,
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[_EGL_DEBUG] = ANDROID_LOG_DEBUG,
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LOG_PRI(egl2alog[level], LOG_TAG, "%s", msg);
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fprintf(stderr, "libEGL %s: %s\n", level_strings[level], msg);
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#endif /* HAVE_ANDROID_PLATFORM */
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* Initialize the logging facility.
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EGLint i, level = -1;
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if (logging.initialized)
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log_env = getenv("EGL_LOG_LEVEL");
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for (i = 0; i < ARRAY_SIZE(level_strings); i++) {
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if (strcasecmp(log_env, level_strings[i]) == 0) {
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logging.level = (level >= 0) ? level : FALLBACK_LOG_LEVEL;
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logging.initialized = EGL_TRUE;
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/* it is fine to call _eglLog now */
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if (log_env && level < 0) {
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_eglLog(_EGL_WARNING,
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"Unrecognized EGL_LOG_LEVEL environment variable value. "
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"Expected one of \"fatal\", \"warning\", \"info\", \"debug\". "
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"Got \"%s\". Falling back to \"%s\".",
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log_env, level_strings[FALLBACK_LOG_LEVEL]);
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* Return the log level.
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_eglGetLogLevel(void)
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return logging.level;
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* Log a message with message logger.
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* \param level one of _EGL_FATAL, _EGL_WARNING, _EGL_INFO, _EGL_DEBUG.
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_eglLog(EGLint level, const char *fmtStr, ...)
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/* one-time initialization; a little race here is fine */
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if (!logging.initialized)
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if (level > logging.level || level < 0)
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mtx_lock(&logging.mutex);
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va_start(args, fmtStr);
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ret = vsnprintf(msg, MAXSTRING, fmtStr, args);
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if (ret < 0 || ret >= MAXSTRING)
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strcpy(msg, "<message truncated>");
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_eglDefaultLogger(level, msg);
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mtx_unlock(&logging.mutex);
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if (level == _EGL_FATAL)
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exit(1); /* or abort()? */