/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
 * Copyright 1998-2007 The OpenLDAP Foundation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
 * Public License.
 *
 * A copy of this license is available in the file LICENSE in the
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
/*
 * Copyright (c) 1991 Regents of the University of Michigan.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of Michigan at Ann Arbor. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
 */
/* ACKNOWLEDGEMENTS:
 * This work was originally developed by the University of Michigan
 * (as part of U-MICH LDAP).
 */

#include "portable.h"

#include <stdio.h>

#include <ac/ctype.h>
#include <ac/stdarg.h>
#include <ac/string.h>

#include "lber-int.h"

#define	ber_log_check(errlvl, loglvl)	((errlvl) & (loglvl))

BER_LOG_FN ber_int_log_proc = NULL;

/*
 * We don't just set ber_pvt_err_file to stderr here, because in NT,
 * stderr is a symbol imported from a DLL. As such, the compiler
 * doesn't recognize the symbol as having a constant address. Thus
 * we set ber_pvt_err_file to stderr later, when it first gets
 * referenced.
 */
FILE *ber_pvt_err_file = NULL;

/*
 * ber errno
 */
BER_ERRNO_FN ber_int_errno_fn = NULL;

int * ber_errno_addr(void)
{
	static int ber_int_errno = LBER_ERROR_NONE;

	if( ber_int_errno_fn ) {
		return (*ber_int_errno_fn)();
	}

	return &ber_int_errno;
}

/*
 * Print stuff
 */
void ber_error_print( LDAP_CONST char *data )
{
	assert( data != NULL );

	if (!ber_pvt_err_file) ber_pvt_err_file = stderr;

	fputs( data, ber_pvt_err_file );

	/* Print to both streams */
	if (ber_pvt_err_file != stderr) {
		fputs( data, stderr );
		fflush( stderr );
	}

	fflush( ber_pvt_err_file );
}

BER_LOG_PRINT_FN ber_pvt_log_print = ber_error_print;

/*
 * lber log 
 */

int ber_pvt_log_output(
	const char *subsystem,
	int level,
	const char *fmt,
	... )
{
	char buf[1024];
	va_list vl;
	va_start( vl, fmt );

	if ( ber_int_log_proc != NULL ) {
		ber_int_log_proc( ber_pvt_err_file, subsystem, level, fmt, vl );

	} else {
		int level;
		ber_get_option( NULL, LBER_OPT_BER_DEBUG, &level );
		buf[sizeof(buf) - 1] = '\0';
		vsnprintf( buf, sizeof(buf)-1, fmt, vl );
		if ( ber_log_check( LDAP_DEBUG_BER, level ) ) {
			(*ber_pvt_log_print)( buf );
		}
	}

	va_end(vl);
	return 1;
}
	
int ber_pvt_log_printf( int errlvl, int loglvl, const char *fmt, ... )
{
	char buf[1024];
	va_list ap;

	assert( fmt != NULL );

	if ( !ber_log_check( errlvl, loglvl )) {
		return 0;
	}

	va_start( ap, fmt );

	buf[sizeof(buf) - 1] = '\0';
	vsnprintf( buf, sizeof(buf)-1, fmt, ap );

	va_end(ap);

	(*ber_pvt_log_print)( buf );
	return 1;
}

#if 0
static int ber_log_puts(int errlvl, int loglvl, char *buf)
{
	assert( buf != NULL );

	if ( !ber_log_check( errlvl, loglvl )) {
		return 0;
	}

	(*ber_pvt_log_print)( buf );
	return 1;
}
#endif

/*
 * Print arbitrary stuff, for debugging.
 */

int
ber_log_bprint(int errlvl,
	int loglvl,
	const char *data,
	ber_len_t len )
{
	assert( data != NULL );

	if ( !ber_log_check( errlvl, loglvl )) {
		return 0;
	}

	ber_bprint(data, len);
	return 1;
}

void
ber_bprint(
	LDAP_CONST char *data,
	ber_len_t len )
{
	static const char hexdig[] = "0123456789abcdef";
#define BP_OFFSET 9
#define BP_GRAPH 60
#define BP_LEN	80
	char	line[BP_LEN];
	ber_len_t i;

	assert( data != NULL );

	/* in case len is zero */
	line[0] = '\n';
	line[1] = '\0';
	
	for ( i = 0 ; i < len ; i++ ) {
		int n = i % 16;
		unsigned off;

		if( !n ) {
			if( i ) (*ber_pvt_log_print)( line );
			memset( line, ' ', sizeof(line)-2 );
			line[sizeof(line)-2] = '\n';
			line[sizeof(line)-1] = '\0';

			off = i % 0x0ffffU;

			line[2] = hexdig[0x0f & (off >> 12)];
			line[3] = hexdig[0x0f & (off >>  8)];
			line[4] = hexdig[0x0f & (off >>  4)];
			line[5] = hexdig[0x0f & off];
			line[6] = ':';
		}

		off = BP_OFFSET + n*3 + ((n >= 8)?1:0);
		line[off] = hexdig[0x0f & ( data[i] >> 4 )];
		line[off+1] = hexdig[0x0f & data[i]];
		
		off = BP_GRAPH + n + ((n >= 8)?1:0);

		if ( isprint( (unsigned char) data[i] )) {
			line[BP_GRAPH + n] = data[i];
		} else {
			line[BP_GRAPH + n] = '.';
		}
	}

	(*ber_pvt_log_print)( line );
}


int
ber_log_dump(
	int errlvl,
	int loglvl,
	BerElement *ber,
	int inout )
{
	assert( ber != NULL );
	assert( LBER_VALID( ber ) );

	if ( !ber_log_check( errlvl, loglvl )) {
		return 0;
	}

	ber_dump(ber, inout);
	return 1;
}

void
ber_dump(
	BerElement *ber,
	int inout )
{
	char buf[132];
	ber_len_t len;

	assert( ber != NULL );
	assert( LBER_VALID( ber ) );

	if ( inout == 1 ) {
		len = ber_pvt_ber_remaining(ber);
	} else {
		len = ber_pvt_ber_write(ber);
	}

	sprintf( buf, "ber_dump: buf=%p ptr=%p end=%p len=%ld\n",
		ber->ber_buf,
		ber->ber_ptr,
		ber->ber_end,
		(long) len );

	(void) (*ber_pvt_log_print)( buf );

	ber_bprint( ber->ber_ptr, len );
}

int
ber_log_sos_dump(
	int errlvl,
	int loglvl,
	Seqorset *sos )
{
	assert( sos != NULL );

	if ( !ber_log_check( errlvl, loglvl )) {
		return 0;
	}

	ber_sos_dump( sos );
	return 1;
}

void
ber_sos_dump(
	Seqorset *sos )
{
	char buf[132];

	assert( sos != NULL );

	(*ber_pvt_log_print)( "*** sos dump ***\n" );

	while ( sos != NULL ) {
		sprintf( buf, "ber_sos_dump: clen %ld first %p ptr %p\n",
		    (long) sos->sos_clen,
			sos->sos_first,
			sos->sos_ptr );
		(*ber_pvt_log_print)( buf );

		sprintf( buf, "              current len %ld contents:\n",
		    (long) (sos->sos_ptr - sos->sos_first) );
		(*ber_pvt_log_print)( buf );

		ber_bprint( sos->sos_first, sos->sos_ptr - sos->sos_first );

		sos = sos->sos_next;
	}

	(*ber_pvt_log_print)( "*** end dump ***\n" );
}