/*-------------------------------------------------------------------------
 *
 * name.c--
 *    Functions for the internal type "name".
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *    $Header: /usr/local/devel/pglite/cvs/src/backend/utils/adt/name.c,v 1.1.1.1 1994/11/07 05:19:48 andrew Exp $
 *
 *-------------------------------------------------------------------------
 */
#include <string.h>
#include "postgres.h"
#include "utils/builtins.h"	/* where the declarations go */

/***************************************************************************** 
 *   USER I/O ROUTINES (none)                                                *
 *****************************************************************************/


/***************************************************************************** 
 *   PUBLIC ROUTINES                                                         *
 *****************************************************************************/

/* (see char.c for comparison/operation routines) */

int namecpy(Name n1, Name n2)
{
    if (!n1 || !n2)
	return(-1);
    (void) strncpy(n1->data, n2->data, NAMEDATALEN);
    return(0);
}

int namecat(Name n1, Name n2)
{
    return(namestrcat(n1, n2->data)); /* n2 can't be any longer than n1 */
}

int namecmp(Name n1, Name n2)
{
    return(strncmp(n1->data, n2->data, NAMEDATALEN));
}

int namestrcpy(Name name, char *str)
{
    if (!name || !str)
	return(-1);
    memset(name->data, 0, sizeof(NameData));
    (void) strncpy(name->data, str, NAMEDATALEN);
    return(0);
}

int namestrcat(Name name, char *str)
{
    int i;
    char *p, *q;
    
    if (!name || !str)
	return(-1);
    for (i = 0, p = name->data; i < NAMEDATALEN && *p; ++i, ++p)
	;
    for (q = str; i < NAMEDATALEN; ++i, ++p, ++q) {
	*p = *q;
	if (!*q)
	    break;
    }
    return(0);
}

int namestrcmp(Name name, char *str)
{
    if (!name && !str)
	return(0);
    if (!name)
	return(-1);	/* NULL < anything */
    if (!str)
	return(1);	/* NULL < anything */
    return(strncmp(name->data, str, NAMEDATALEN));
}

/***************************************************************************** 
 *   PRIVATE ROUTINES                                                        *
 *****************************************************************************/

/*
 * Note:
 *	This is the same code as char16eq.
 *	Assumes that "xy\0\0a" should be equal to "xy\0b".
 */
bool NameIsEqual(Name name1, Name name2)
{
    if (! PointerIsValid(name1) || ! PointerIsValid(name2)) {
	return(false);
    }
    return((bool)(strncmp(name1->data, name2->data, NAMEDATALEN) == 0));
}

uint32 NameComputeLength(Name name)
{
    char	*charP;
    int	length;
    
    Assert(NameIsValid(name));
    
    for (length = 0, charP = name->data;
	 length < NAMEDATALEN && *charP != '\0';
	 length++, charP++) {
	;
    }
    return (uint32)length;
}