/*-------------------------------------------------------------------------
 *
 * char.c--
 *    Functions for the built-in type "char".
 *    Functions for the built-in type "cid".
 *    Functions for the built-in type "char2".
 *    Functions for the built-in type "char4".
 *    Functions for the built-in type "char8".
 *    Functions for the built-in type "char16".
 *
 * Copyright (c) 1994, Regents of the University of California
 *
 *
 * IDENTIFICATION
 *    $Header: /cvsroot/pgsql/src/backend/utils/adt/char.c,v 1.6 1997/08/12 20:15:55 momjian Exp $
 *
 *-------------------------------------------------------------------------
 */
#include <stdio.h>		/* for sprintf() */
#include <string.h>
#include "postgres.h"
#include "utils/palloc.h"
#include "utils/builtins.h"		/* where the declarations go */

/***************************************************************************** 
 *   USER I/O ROUTINES                                                       *
 *****************************************************************************/

/*
 *	charin		- converts "x" to 'x'
 */
int32 charin(char *ch)
{
    if (ch == NULL)
	return((int32) NULL);
    return((int32) *ch);
}

/*
 *	charout		- converts 'x' to "x"
 */
char *charout(int32 ch)
{
    char	*result = (char *) palloc(2);
    
    result[0] = (char) ch;
    result[1] = '\0';
    return(result);
}

/*
 *	cidin	- converts "..." to internal representation.
 *
 * 	NOTE: we must not use 'charin' because cid might be a non
 *	printable character...
 */
int32 cidin(char *s)
{
    CommandId c;
    
    if (s==NULL)
	c = 0;
    else
	c = atoi(s);
    
    return((int32)c);
}

/*
 *	cidout	- converts a cid to "..."
 *
 * 	NOTE: we must no use 'charout' because cid might be a non
 *	printable character...
 */
char *cidout(int32 c)
{
    char *result;
    CommandId c2;
    
    /*
     * cid is a number between 0 .. 2^16-1, therefore we need at most
     * 6 chars for the string (5 digits + '\0')
     * NOTE: print it as an UNSIGNED int!
     */
    result = palloc(6);
    c2 = (CommandId)c;
    sprintf(result, "%u", (unsigned)(c2));
    return(result);
}

/*
 *	char16in	- converts "..." to internal reprsentation
 *
 *	Note:
 *		Currently if strlen(s) < 14, the extra chars are nulls
 */
char *char16in(char *s)
{
    char	*result;

    if (s == NULL)
	return(NULL);
    result = (char *) palloc(16);
    memset(result, 0, 16);
    (void) strncpy(result, s, 16);
    return(result);
}

/*
 *	char16out	- converts internal reprsentation to "..."
 */
char *char16out(char *s)
{
    char	*result = (char *) palloc(17);
    
    memset(result, 0, 17);
    if (s == NULL) {
	result[0] = '-';
    } else {
	strncpy(result, s, 16);
    }
    return(result);
}


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

bool chareq(int8 arg1, int8 arg2)	{ return(arg1 == arg2); }
bool charne(int8 arg1, int8 arg2)	{ return(arg1 != arg2); }
bool charlt(int8 arg1, int8 arg2)    { return((uint8)arg1 <  (uint8)arg2); }
bool charle(int8 arg1, int8 arg2)    { return((uint8)arg1 <= (uint8)arg2); }
bool chargt(int8 arg1, int8 arg2)    { return((uint8)arg1 >  (uint8)arg2); }
bool charge(int8 arg1, int8 arg2)    { return((uint8)arg1 >= (uint8)arg2); }
int8 charpl(int8 arg1, int8 arg2)       { return(arg1 + arg2); }
int8 charmi(int8 arg1, int8 arg2)	{ return(arg1 - arg2); }
int8 charmul(int8 arg1, int8 arg2)	{ return(arg1 * arg2); }
int8 chardiv(int8 arg1, int8 arg2)	{ return(arg1 / arg2); }

bool cideq(int8 arg1, int8 arg2)	{ return(arg1 == arg2); }

/*
 *	char16eq	- returns 1 iff arguments are equal
 *	char16ne	- 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.
 *
 *	char16lt	- returns 1 iff a < b
 *	char16le	- returns 1 iff a <= b
 *	char16gt	- returns 1 iff a < b
 *	char16ge	- returns 1 iff a <= b
 *
 */
bool char16eq(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    return(strncmp(arg1, arg2, 16) == 0);
}

bool char16ne(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    return(strncmp(arg1, arg2, 16) != 0);
}

bool char16lt(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    return(strncmp(arg1, arg2, 16) < 0);
}

bool char16le(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    return(strncmp(arg1, arg2, 16) <= 0);
}

bool char16gt(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    
    return(strncmp(arg1, arg2, 16) > 0);
}

bool char16ge(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    
    return(strncmp(arg1, arg2, 16) >= 0);
}


/* ============================== char2 ============================== */
uint16 char2in(char *s)
{
    uint16	res;
    
    if (s == NULL)
	return(0);
    
    memset((char *) &res, 0, sizeof(res));
    (void) strncpy((char *) &res, s, 2);
    return(res);
}

char *char2out(uint16 s)
{
    char	*result = (char *) palloc(3);
    
    memset(result, 0, 3);
    (void) strncpy(result, (char *) &s, 2);
    
    return(result);
}

bool char2eq(uint16 a, uint16 b)
{
    return(strncmp((char *) &a, (char *) &b, 2) == 0);
}

bool char2ne(uint16 a, uint16 b)
{
    return(strncmp((char *) &a, (char *) &b, 2) != 0);
}

bool char2lt(uint16 a, uint16 b)
{
    return(strncmp((char *) &a, (char *) &b, 2) < 0);
}

bool char2le(uint16 a, uint16 b)
{
    return(strncmp((char *) &a, (char *) &b, 2) <= 0);
}

bool char2gt(uint16 a, uint16 b)
{
    return(strncmp((char *) &a, (char *) &b, 2) > 0);
}

bool char2ge(uint16 a, uint16 b)
{
    return(strncmp((char *) &a, (char *) &b, 2) >= 0);
}

int32 char2cmp(uint16 a, uint16 b)
{
    return (strncmp((char *) &a, (char *) &b, 2));
}

/* ============================== char4 ============================== */
uint32 char4in(char *s)
{
    uint32	res;
    
    if (s == NULL)
	return(0);
    
    strncpy((char *) &res, s, 4);
    
    return(res);
}

char *char4out(s)
     uint32 s;
{
    char	*result = (char *) palloc(5);
    
    strNcpy(result, (char *) &s, 4);
    
    return(result);
}

bool char4eq(uint32 a, uint32 b)
{
    return(strncmp((char *) &a, (char *) &b, 4) == 0);
}

bool char4ne(uint32 a, uint32 b)
{
    return(strncmp((char *) &a, (char *) &b, 4) != 0);
}

bool char4lt(uint32 a, uint32 b)
{
    return(strncmp((char *) &a, (char *) &b, 4) < 0);
}

bool char4le(uint32 a, uint32 b)
{
    return(strncmp((char *) &a, (char *) &b, 4) <= 0);
}

bool char4gt(uint32 a, uint32 b)
{
    return(strncmp((char *) &a, (char *) &b, 4) > 0);
}

bool char4ge(uint32 a, uint32 b)
{
    return(strncmp((char *) &a, (char *) &b, 4) >= 0);
}

int32 char4cmp(uint32 a, uint32 b)
{
    return(strncmp((char *) &a, (char *) &b, 4));
}

/* ============================== char8 ============================== */
char *char8in(char *s)
{
    char	*result;
    
    if (s == NULL)
	return((char *) NULL);
    
    result = (char *) palloc(8);
    strncpy(result, s, 8);
    return(result);
}

char *char8out(char *s)
{
    char	*result = (char *) palloc(9);
    
    if (s == NULL) {
	result[0] = '-';
	result[1] = '\0';
    } else
	strNcpy(result, s, 8);
    return(result);
}

bool char8eq(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    return(strncmp(arg1, arg2, 8) == 0);
}

bool char8ne(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    return(strncmp(arg1, arg2, 8) != 0);
}

bool char8lt(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    return(strncmp(arg1, arg2, 8) < 0);
}

bool char8le(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    return(strncmp(arg1, arg2, 8) <= 0);
}

bool char8gt(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    return(strncmp(arg1, arg2, 8) > 0);
}

bool char8ge(char *arg1, char *arg2)
{
    if (arg1 == NULL || arg2 == NULL)
	return((bool) 0);
    return(strncmp(arg1, arg2, 8) >= 0);
}

int32 char8cmp(char *arg1, char *arg2)
{
    return(strncmp(arg1, arg2, 8));
}