/*
 * Copyright (c) 2016, NVIDIA CORPORATION.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and/or associated documentation files (the
 * "Materials"), to deal in the Materials without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Materials, and to
 * permit persons to whom the Materials are furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * unaltered in all copies or substantial portions of the Materials.
 * Any additions, deletions, or changes to the original source files
 * must be clearly indicated in accompanying documentation.
 *
 * If only executable code is distributed, then the accompanying
 * documentation must state that "this software is based in part on the
 * work of the Khronos Group."
 *
 * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
 */

#include "app_error_check.h"

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>

static int errorCheckingEnabled = 0;
static int reportAppErrorsEnabled = 0;
static int abortOnAppError = 0;

void glvndAppErrorCheckInit(void)
{
    const char *env;

    env = getenv("__GLVND_APP_ERROR_CHECKING");
    if (env != NULL) {
        errorCheckingEnabled = (atoi(env) != 0 ? 1 : 0);
        if (errorCheckingEnabled) {
            reportAppErrorsEnabled = 1;
            abortOnAppError = 1;
        }
    }

    env = getenv("__GLVND_ABORT_ON_APP_ERROR");
    if (env != NULL) {
        abortOnAppError = (atoi(env) != 0 ? 1 : 0);
        if (abortOnAppError) {
            reportAppErrorsEnabled = 1;
        }
    }
}

void glvndAppErrorCheckReportError(const char *format, ...)
{
    if (reportAppErrorsEnabled) {
        va_list args;
        va_start(args, format);
        vfprintf(stderr, format, args);
        va_end(args);
        fflush(stderr);

        if (abortOnAppError) {
            abort();
        }
    }
}

int glvndAppErrorCheckGetEnabled(void)
{
    return errorCheckingEnabled;
}