/*
 * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
 */
/* attr.c - routines for dealing with attributes */

#include "portable.h"

#include <stdio.h>

#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif

#include <ac/ctype.h>
#include <ac/errno.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>

#ifdef HAVE_SYS_PARAM_H
#include <sys/param.h>
#endif

#include "ldap_pvt.h"
#include "slap.h"

#ifdef LDAP_DEBUG
static void at_index_print( void );
#endif

void
attr_free( Attribute *a )
{
	free( a->a_type );
	ber_bvecfree( a->a_vals );
	free( a );
}

void
attrs_free( Attribute *a )
{
	Attribute *next;

	for( ; a != NULL ; a = next ) {
		next = a->a_next;
		attr_free( a );
	}
}

Attribute *attr_dup( Attribute *a )
{
	Attribute *tmp;

	if( a == NULL) return NULL;

	tmp = ch_malloc( sizeof(Attribute) );

	if( a->a_vals != NULL ) {
		int i;

		for( i=0; a->a_vals[i] != NULL; i++ ) {
			/* EMPTY */ ;
		}

		tmp->a_vals = ch_malloc((i+1) * sizeof(struct berval*));

		for( i=0; a->a_vals[i] != NULL; i++ ) {
			tmp->a_vals[i] = ber_bvdup( a->a_vals[i] );

			if( tmp->a_vals[i] == NULL ) break;
		}

		tmp->a_vals[i] = NULL;

	} else {
		tmp->a_vals = NULL;
	}

	tmp->a_type = ch_strdup( a->a_type );
	tmp->a_syntax = a->a_syntax;
	tmp->a_next = NULL;

	return tmp;
}

Attribute *attrs_dup( Attribute *a )
{
	Attribute *tmp, **next;

	if( a == NULL ) return NULL;

	tmp = NULL;
	next = &tmp;

	for( ; a != NULL ; a = a->a_next ) {
		*next = attr_dup( a );
		next = &((*next)->a_next);
	}
	*next = NULL;

	return tmp;
}

/*
 * attr_normalize - normalize an attribute name (make it all lowercase)
 */

char *
attr_normalize( char *s )
{
	assert( s != NULL );

	return( ldap_pvt_str2lower( s ) );
}

/*
 * attr_merge_fast - merge the given type and value with the list of
 * attributes in attrs. called from str2entry(), where we can make some
 * assumptions to make things faster.
 * returns	0	everything went ok
 *		-1	trouble
 */

int
attr_merge_fast(
    Entry		*e,
    char		*type,
    struct berval	**vals,
    int			nvals,
    int			naddvals,
    int			*maxvals,
    Attribute		***a
)
{
	if ( *a == NULL ) {
		for ( *a = &e->e_attrs; **a != NULL; *a = &(**a)->a_next ) {
			if ( strcasecmp( (**a)->a_type, type ) == 0 ) {
				break;
			}
		}
	}

	if ( **a == NULL ) {
		**a = (Attribute *) ch_malloc( sizeof(Attribute) );
		(**a)->a_type = attr_normalize( ch_strdup( type ) );
		(**a)->a_vals = NULL;
		(**a)->a_syntax = attr_syntax( type );
		(**a)->a_next = NULL;
	}

	return( value_add_fast( &(**a)->a_vals, vals, nvals, naddvals,
	    maxvals ) );
}

/*
 * attr_merge - merge the given type and value with the list of
 * attributes in attrs.
 * returns	0	everything went ok
 *		-1	trouble
 */

int
attr_merge(
    Entry		*e,
    char		*type,
    struct berval	**vals
)
{
	Attribute	**a;

	for ( a = &e->e_attrs; *a != NULL; a = &(*a)->a_next ) {
		if ( strcasecmp( (*a)->a_type, type ) == 0 ) {
			break;
		}
	}

	if ( *a == NULL ) {
		*a = (Attribute *) ch_malloc( sizeof(Attribute) );
		(*a)->a_type = attr_normalize( ch_strdup( type ) );
		(*a)->a_vals = NULL;
		(*a)->a_syntax = attr_syntax( type );
		(*a)->a_next = NULL;
	}

	return( value_add( &(*a)->a_vals, vals ) );
}

/*
 * attr_find - find and return attribute type in list a
 */

Attribute *
attr_find(
    Attribute	*a,
    const char	*type
)
{
	for ( ; a != NULL; a = a->a_next ) {
		if ( strcasecmp( a->a_type, type ) == 0 ) {
			return( a );
		}
	}

	return( NULL );
}

/*
 * attr_delete - delete the attribute type in list pointed to by attrs
 * return	0	deleted ok
 * 		1	not found in list a
 * 		-1	something bad happened
 */

int
attr_delete(
    Attribute	**attrs,
    const char	*type
)
{
	Attribute	**a;
	Attribute	*save;

	for ( a = attrs; *a != NULL; a = &(*a)->a_next ) {
		if ( strcasecmp( (*a)->a_type, type ) == 0 ) {
			break;
		}
	}

	if ( *a == NULL ) {
		return( 1 );
	}

	save = *a;
	*a = (*a)->a_next;
	attr_free( save );

	return( 0 );
}

#define DEFAULT_SYNTAX	SYNTAX_CIS

/*
 * attr_syntax - return the syntax of attribute type
 */

int
attr_syntax( char *type )
{
	AttributeType	*sat;

	sat = at_find(type);
	if ( sat ) {
		return( sat->sat_syntax_compat );
	}

	return( DEFAULT_SYNTAX );
}

/*
 * attr_syntax_config - process an attribute syntax config line
 */

void
attr_syntax_config(
    const char	*fname,
    int		lineno,
    int		argc,
    char	**argv
)
{
	char			*save;
	LDAP_ATTRIBUTE_TYPE	*at;
	int			lasti;
	int			code;
	const char		*err;

	if ( argc < 2 ) {
		Debug( LDAP_DEBUG_ANY,
"%s: line %d: missing name in \"attribute <name>+ <syntax>\" (ignored)\n",
		    fname, lineno, 0 );
		return;
	}

	at = (LDAP_ATTRIBUTE_TYPE *)
		ch_calloc( 1, sizeof(LDAP_ATTRIBUTE_TYPE) );

	lasti = argc - 1;
	if ( strcasecmp( argv[lasti], "caseignorestring" ) == 0 ||
	    strcasecmp( argv[lasti], "cis" ) == 0 ) {
		at->at_syntax_oid = "1.3.6.1.4.1.1466.115.121.1.15";
		at->at_equality_oid = "2.5.13.2";
		at->at_ordering_oid = "2.5.13.3";
		at->at_substr_oid = "2.5.13.4";
	} else if ( strcasecmp( argv[lasti], "telephone" ) == 0 ||
	    strcasecmp( argv[lasti], "tel" ) == 0 ) {
		at->at_syntax_oid = "1.3.6.1.4.1.1466.115.121.1.50";
		at->at_equality_oid = "2.5.13.20";
		at->at_substr_oid = "2.5.13.21";
	} else if ( strcasecmp( argv[lasti], "dn" ) == 0 ) {
		at->at_syntax_oid = "1.3.6.1.4.1.1466.115.121.1.12";
		at->at_equality_oid = "2.5.13.1";
	} else if ( strcasecmp( argv[lasti], "caseexactstring" ) == 0 ||
	    strcasecmp( argv[lasti], "ces" ) == 0 ) {
		at->at_syntax_oid = "1.3.6.1.4.1.1466.115.121.1.15";
		at->at_equality_oid = "2.5.13.5";
		at->at_ordering_oid = "2.5.13.6";
		at->at_substr_oid = "2.5.13.7";
	} else if ( strcasecmp( argv[lasti], "binary" ) == 0 ||
	    strcasecmp( argv[lasti], "bin" ) == 0 ) {
		at->at_syntax_oid = "1.3.6.1.4.1.1466.115.121.1.5";
		/* There is no match for binary syntax. Really */
	} else {
		Debug( LDAP_DEBUG_ANY,
	    "%s: line %d: unknown syntax \"%s\" in attribute line (ignored)\n",
		    fname, lineno, argv[lasti] );
		Debug( LDAP_DEBUG_ANY,
    "possible syntaxes are \"cis\", \"ces\", \"tel\", \"dn\", or \"bin\"\n",
		    0, 0, 0 );
		free( (AttributeType *) at );
		return;
	}

	save = argv[lasti];
	argv[lasti] = NULL;
	at->at_names = charray_dup( argv );
	argv[lasti] = save;

	code = at_add( at, &err );
	if ( code ) {
		fprintf( stderr, "%s: line %d: %s %s\n",
			 fname, lineno, scherr2str(code), err);
		exit( EXIT_FAILURE );
	}
	ldap_memfree(at);
}

int
at_fake_if_needed(
    char	*name
)
{
	char *argv[3];

	if ( at_find( name ) ) {
		return 0;
	} else {
		argv[0] = name;
		argv[1] = "cis";
		argv[2] = NULL;
		attr_syntax_config( "implicit", 0, 2, argv );
		return 0;
	}
}

struct aindexrec {
	char		*air_name;
	AttributeType	*air_at;
};

static Avlnode	*attr_index = NULL;
static AttributeType *attr_list = NULL;

static int
attr_index_cmp(
    struct aindexrec	*air1,
    struct aindexrec	*air2
)
{
	return (strcasecmp( air1->air_name, air2->air_name ));
}

static int
attr_index_name_cmp(
    char 		*type,
    struct aindexrec	*air
)
{
	return (strcasecmp( type, air->air_name ));
}

AttributeType *
at_find(
    const char		*name
)
{
	struct aindexrec	*air = NULL;

	if ( (air = (struct aindexrec *) avl_find( attr_index, name,
            (AVL_CMP) attr_index_name_cmp )) != NULL ) {
		return( air->air_at );
	}
	return( NULL );
}

int
at_append_to_list(
    AttributeType	*sat,
    AttributeType	***listp
)
{
	AttributeType	**list;
	AttributeType	**list1;
	int		size;

	list = *listp;
	if ( !list ) {
		size = 2;
		list = calloc(size, sizeof(AttributeType *));
		if ( !list ) {
			return -1;
		}
	} else {
		size = 0;
		list1 = *listp;
		while ( *list1 ) {
			size++;
			list1++;
		}
		size += 2;
		list1 = realloc(list, size*sizeof(AttributeType *));
		if ( !list1 ) {
			return -1;
		}
		list = list1;
	}
	list[size-2] = sat;
	list[size-1] = NULL;
	*listp = list;
	return 0;
}

int
at_delete_from_list(
    int			pos,
    AttributeType	***listp
)
{
	AttributeType	**list;
	AttributeType	**list1;
	int		i;
	int		j;

	if ( pos < 0 ) {
		return -2;
	}
	list = *listp;
	for ( i=0; list[i]; i++ )
		;
	if ( pos >= i ) {
		return -2;
	}
	for ( i=pos, j=pos+1; list[j]; i++, j++ ) {
		list[i] = list[j];
	}
	list[i] = NULL;
	/* Tell the runtime this can be shrinked */
	list1 = realloc(list, (i+1)*sizeof(AttributeType **));
	if ( !list1 ) {
		return -1;
	}
	*listp = list1;
	return 0;
}

int
at_find_in_list(
    AttributeType	*sat,
    AttributeType	**list
)
{
	int	i;

	if ( !list ) {
		return -1;
	}
	for ( i=0; list[i]; i++ ) {
		if ( sat == list[i] ) {
			return i;
		}
	}
	return -1;
}

static int
at_insert(
    AttributeType	*sat,
    const char		**err
)
{
	AttributeType		**atp;
	struct aindexrec	*air;
	char			**names;

	atp = &attr_list;
	while ( *atp != NULL ) {
		atp = &(*atp)->sat_next;
	}
	*atp = sat;

	if ( sat->sat_oid ) {
		air = (struct aindexrec *)
			ch_calloc( 1, sizeof(struct aindexrec) );
		air->air_name = sat->sat_oid;
		air->air_at = sat;
		if ( avl_insert( &attr_index, (caddr_t) air,
				 (AVL_CMP) attr_index_cmp,
				 (AVL_DUP) avl_dup_error ) ) {
			*err = sat->sat_oid;
			ldap_memfree(air);
			return SLAP_SCHERR_DUP_ATTR;
		}
		/* FIX: temporal consistency check */
		at_find(air->air_name);
	}
	if ( (names = sat->sat_names) ) {
		while ( *names ) {
			air = (struct aindexrec *)
				ch_calloc( 1, sizeof(struct aindexrec) );
			air->air_name = ch_strdup(*names);
			air->air_at = sat;
			if ( avl_insert( &attr_index, (caddr_t) air,
					 (AVL_CMP) attr_index_cmp,
					 (AVL_DUP) avl_dup_error ) ) {
				*err = *names;
				ldap_memfree(air);
				return SLAP_SCHERR_DUP_ATTR;
			}
			/* FIX: temporal consistency check */
			at_find(air->air_name);
			names++;
		}
	}

	return 0;
}

int
at_add(
    LDAP_ATTRIBUTE_TYPE	*at,
    const char		**err
)
{
	AttributeType	*sat;
	AttributeType	*sat1;
	MatchingRule	*mr;
	Syntax		*syn;
	int		code;
	char		*errattr;

	if ( at->at_names && at->at_names[0] ) {
		errattr = at->at_names[0];
	} else if ( at->at_oid ) {
		errattr = at->at_oid;
	} else {
		errattr = "";
		return SLAP_SCHERR_ATTR_INCOMPLETE;
	}
	sat = (AttributeType *) ch_calloc( 1, sizeof(AttributeType) );
	memcpy( &sat->sat_atype, at, sizeof(LDAP_ATTRIBUTE_TYPE));
	if ( at->at_sup_oid ) {
		if ( (sat1 = at_find(at->at_sup_oid)) ) {
			sat->sat_sup = sat1;
			if ( at_append_to_list(sat, &sat1->sat_subtypes) ) {
				*err = errattr;
				return SLAP_SCHERR_OUTOFMEM;
			}
		} else {
			*err = at->at_sup_oid;
			return SLAP_SCHERR_ATTR_NOT_FOUND;
		}
	}

	if ( at->at_syntax_oid ) {
		if ( (syn = syn_find(sat->sat_syntax_oid)) ) {
			sat->sat_syntax = syn;
		} else {
			*err = sat->sat_syntax_oid;
			return SLAP_SCHERR_SYN_NOT_FOUND;
		}
		if ( !strcmp(at->at_syntax_oid,
			     "1.3.6.1.4.1.1466.115.121.1.15") ) {
			if ( at->at_equality_oid &&
			     !strcmp(at->at_equality_oid, "2.5.13.5") ) {
				sat->sat_syntax_compat = SYNTAX_CES;
			} else {
				sat->sat_syntax_compat = SYNTAX_CIS;
			}
		} else if ( !strcmp(at->at_syntax_oid,
				    "1.3.6.1.4.1.1466.115.121.1.50") ) {
			sat->sat_syntax_compat = SYNTAX_CIS | SYNTAX_TEL;
		} else if ( !strcmp(at->at_syntax_oid,
				    "1.3.6.1.4.1.1466.115.121.1.12") ) {
			sat->sat_syntax_compat = SYNTAX_CIS | SYNTAX_DN;
		} else if ( !strcmp(at->at_syntax_oid, "1.3.6.1.4.1.1466.115.121.1.5") ) {
			sat->sat_syntax_compat = SYNTAX_BIN;
		} else {
			sat->sat_syntax_compat = DEFAULT_SYNTAX;
		}
	} else {
		sat->sat_syntax_compat = DEFAULT_SYNTAX;
	}

	if ( sat->sat_equality_oid ) {
		if ( (mr = mr_find(sat->sat_equality_oid)) ) {
			sat->sat_equality = mr;
		} else {
			*err = sat->sat_equality_oid;
			return SLAP_SCHERR_MR_NOT_FOUND;
		}
	}
	if ( sat->sat_ordering_oid ) {
		if ( (mr = mr_find(sat->sat_ordering_oid)) ) {
			sat->sat_ordering = mr;
		} else {
			*err = sat->sat_ordering_oid;
			return SLAP_SCHERR_MR_NOT_FOUND;
		}
	}
	if ( sat->sat_substr_oid ) {
		if ( (mr = mr_find(sat->sat_substr_oid)) ) {
			sat->sat_substr = mr;
		} else {
			*err = sat->sat_substr_oid;
			return SLAP_SCHERR_MR_NOT_FOUND;
		}
	}

	/*
	 * Now inherit definitions from superiors.  We only check the
	 * direct superior since that one has already inherited from
	 * its own superiorss
	 */
	if ( sat->sat_sup ) {
		if ( !sat->sat_syntax ) {
			sat->sat_syntax = sat->sat_sup->sat_syntax;
			sat->sat_syntax_len = sat->sat_sup->sat_syntax_len;
		}
		if ( !sat->sat_equality ) {
			sat->sat_equality = sat->sat_sup->sat_equality;
		}
		if ( !sat->sat_ordering ) {
			sat->sat_ordering = sat->sat_sup->sat_ordering;
		}
		if ( !sat->sat_substr ) {
			sat->sat_substr = sat->sat_sup->sat_substr;
		}
	}
	code = at_insert(sat,err);
	return code;
}


char *
at_canonical_name( char * a_type )
{
	AttributeType	*atp;

	if ( (atp=at_find(a_type)) == NULL ) {

		return a_type;

	} else  if ( atp->sat_names 
		     && atp->sat_names[0]
		     && (*(atp->sat_names[0]) != '\0') ) {
	    
		return atp->sat_names[0];

	} else if (atp->sat_oid && (*atp->sat_oid != '\0')) {

		return atp->sat_oid;
		
	} else {

		return a_type;

	}

}/* char * at_canonica_name() */


#if defined( SLAPD_SCHEMA_DN )

int
at_schema_info( Entry *e )
{
	struct berval	val;
	struct berval	*vals[2];
	AttributeType	*at;

	vals[0] = &val;
	vals[1] = NULL;

	for ( at = attr_list; at; at = at->sat_next ) {
		val.bv_val = ldap_attributetype2str( &at->sat_atype );
		if ( val.bv_val ) {
			val.bv_len = strlen( val.bv_val );
			Debug( LDAP_DEBUG_TRACE, "Merging at [%ld] %s\n",
			       (long) val.bv_len, val.bv_val, 0 );
			attr_merge( e, "attributeTypes", vals );
			ldap_memfree( val.bv_val );
		} else {
			return -1;
		}
	}
	return 0;
}
#endif

#ifdef LDAP_DEBUG

static int
at_index_printnode( struct aindexrec *air )
{

	printf( "%s = %s\n", air->air_name, ldap_attributetype2str(&air->air_at->sat_atype) );
	return( 0 );
}

static void
at_index_print( void )
{
	printf("Printing attribute type index:\n");
	(void) avl_apply( attr_index, (AVL_APPLY) at_index_printnode,
		0, -1, AVL_INORDER );
}

#endif