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/*-------------------------------------------------------------------------
*
* name.c
* Functions for the built-in type "name".
* name replaces char16 and is carefully implemented so that it
* is a string of length NAMEDATALEN. DO NOT use hard-coded constants anywhere
* always use NAMEDATALEN as the symbolic constant! - jolly 8/21/95
*
*
* Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/name.c,v 1.26 2000/01/22 14:20:49 petere Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "utils/builtins.h"
/*****************************************************************************
* USER I/O ROUTINES (none) *
*****************************************************************************/
/*
* namein - converts "..." to internal representation
*
* Note:
* [Old] Currently if strlen(s) < NAMEDATALEN, the extra chars are nulls
* Now, always NULL terminated
*/
NameData *
namein(const char *s)
{
NameData *result;
int len;
if (s == NULL)
return NULL;
result = (NameData *) palloc(NAMEDATALEN);
/* always keep it null-padded */
StrNCpy(NameStr(*result), s, NAMEDATALEN);
len = strlen(NameStr(*result));
while (len < NAMEDATALEN)
{
*(NameStr(*result) + len) = '\0';
len++;
}
return result;
}
/*
* nameout - converts internal reprsentation to "..."
*/
char *
nameout(const NameData *s)
{
if (s == NULL)
return "-";
else
return pstrdup(NameStr(*s));
}
/*****************************************************************************
* PUBLIC ROUTINES *
*****************************************************************************/
/*
* nameeq - returns 1 iff arguments are equal
* namene - returns 1 iff arguments are not equal
*
* BUGS:
* Assumes that "xy\0\0a" should be equal to "xy\0b".
* If not, can do the comparison backwards for efficiency.
*
* namelt - returns 1 iff a < b
* namele - returns 1 iff a <= b
* namegt - returns 1 iff a < b
* namege - returns 1 iff a <= b
*
*/
bool
nameeq(const NameData *arg1, const NameData *arg2)
{
if (!arg1 || !arg2)
return 0;
else
return (bool) (strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) == 0);
}
bool
namene(const NameData *arg1, const NameData *arg2)
{
if (arg1 == NULL || arg2 == NULL)
return (bool) 0;
return (bool) (strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) != 0);
}
bool
namelt(const NameData *arg1, const NameData *arg2)
{
if (arg1 == NULL || arg2 == NULL)
return (bool) 0;
return (bool) (strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) < 0);
}
bool
namele(const NameData *arg1, const NameData *arg2)
{
if (arg1 == NULL || arg2 == NULL)
return (bool) 0;
return (bool) (strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) <= 0);
}
bool
namegt(const NameData *arg1, const NameData *arg2)
{
if (arg1 == NULL || arg2 == NULL)
return (bool) 0;
return (bool) (strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) > 0);
}
bool
namege(const NameData *arg1, const NameData *arg2)
{
if (arg1 == NULL || arg2 == NULL)
return (bool) 0;
return (bool) (strncmp(NameStr(*arg1), NameStr(*arg2), NAMEDATALEN) >= 0);
}
/* (see char.c for comparison/operation routines) */
int
namecpy(Name n1, Name n2)
{
if (!n1 || !n2)
return -1;
strncpy(NameStr(*n1), NameStr(*n2), NAMEDATALEN);
return 0;
}
#ifdef NOT_USED
int
namecat(Name n1, Name n2)
{
return namestrcat(n1, NameStr(*n2)); /* n2 can't be any longer than n1 */
}
#endif
#ifdef NOT_USED
int
namecmp(Name n1, Name n2)
{
return strncmp(NameStr(*n1), NameStr(*n2), NAMEDATALEN);
}
#endif
int
namestrcpy(Name name, const char *str)
{
if (!name || !str)
return -1;
StrNCpy(NameStr(*name), str, NAMEDATALEN);
return 0;
}
#ifdef NOT_USED
int
namestrcat(Name name, const char *str)
{
int i;
char *p,
*q;
if (!name || !str)
return -1;
for (i = 0, p = NameStr(*name); i < NAMEDATALEN && *p; ++i, ++p)
;
for (q = str; i < NAMEDATALEN; ++i, ++p, ++q)
{
*p = *q;
if (!*q)
break;
}
return 0;
}
#endif
int
namestrcmp(Name name, const char *str)
{
if (!name && !str)
return 0;
if (!name)
return -1; /* NULL < anything */
if (!str)
return 1; /* NULL < anything */
return strncmp(NameStr(*name), str, NAMEDATALEN);
}
/*****************************************************************************
* PRIVATE ROUTINES *
*****************************************************************************/
#ifdef NOT_USED
uint32
NameComputeLength(Name name)
{
char *charP;
int length;
for (length = 0, charP = NameStr(*name);
length < NAMEDATALEN && *charP != '\0';
length++, charP++)
;
return (uint32) length;
}
#endif
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