/* 
 * Copyright (c) 2004 Apple Computer, Inc. All Rights Reserved.
 * 
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

/*
 *  ccdebug.c - CommonCrypto debug macros
 *
 */


#include "ccdebug.h"
#include "ccGlobals.h"
#include <stdlib.h>
#include <asl.h>
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include <dispatch/dispatch.h>


static const char *std_log_prefix = "###CommonCrypto : %s - %s";
static const char *std_ident = "CommonCrypto";
static const char *std_facility = "CipherSuite";

static void
ccdebug_init(cc_globals_t globals) {
    dispatch_once(&globals->debug_init, ^{
        char *ccEnvStdErr = getenv("CC_STDERR");
        uint32_t std_options = 0;

        if(ccEnvStdErr != NULL && strncmp(ccEnvStdErr, "yes", 3) == 0) std_options |= ASL_OPT_STDERR;
        globals->aslhandle = asl_open(std_ident, std_facility, std_options);
        globals->msgptr = asl_new(ASL_TYPE_MSG);
        asl_set(globals->msgptr, ASL_KEY_FACILITY, "com.apple.platformsec");
    });
}
	
#define LINESIZE 256

void
ccdebug_imp(int level, const char *funcname, const char *format, ...) {
	va_list argp;
	char fmtbuffer[LINESIZE];

	cc_globals_t globals = _cc_globals();
	ccdebug_init(globals);
	
	va_start(argp, format);
	snprintf(fmtbuffer, LINESIZE, std_log_prefix, funcname, format);
	asl_vlog(globals->aslhandle, globals->msgptr, level, fmtbuffer, argp);
	va_end(argp);
}