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591 lines
10 KiB
C
591 lines
10 KiB
C
/*-------------------------------------------------------------------------
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*
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* int8.c
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* Internal 64-bit integer operations
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*
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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/int8.c,v 1.20 2000/06/13 07:35:07 tgl Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#include <ctype.h>
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#include <time.h>
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#include <math.h>
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#include <float.h>
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#include "postgres.h"
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#include "utils/int8.h"
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/* this should be set in config.h, but just in case it wasn't: */
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#ifndef INT64_FORMAT
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#define INT64_FORMAT "%ld"
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#endif
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#define MAXINT8LEN 25
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#ifndef INT_MAX
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#define INT_MAX (0x7FFFFFFFL)
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#endif
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#ifndef INT_MIN
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#define INT_MIN (-INT_MAX-1)
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#endif
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#ifndef SHRT_MAX
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#define SHRT_MAX (0x7FFF)
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#endif
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#ifndef SHRT_MIN
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#define SHRT_MIN (-SHRT_MAX-1)
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#endif
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/***********************************************************************
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**
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** Routines for 64-bit integers.
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**
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***********************************************************************/
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/*----------------------------------------------------------
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* Formatting and conversion routines.
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*---------------------------------------------------------*/
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/* int8in()
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*/
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Datum
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int8in(PG_FUNCTION_ARGS)
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{
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char *str = PG_GETARG_CSTRING(0);
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int64 result;
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char *ptr = str;
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int64 tmp = 0;
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int sign = 1;
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/*
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* Do our own scan, rather than relying on sscanf which might be
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* broken for long long.
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*/
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while (*ptr && isspace(*ptr)) /* skip leading spaces */
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ptr++;
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if (*ptr == '-') /* handle sign */
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sign = -1, ptr++;
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else if (*ptr == '+')
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ptr++;
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if (!isdigit(*ptr)) /* require at least one digit */
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elog(ERROR, "Bad int8 external representation \"%s\"", str);
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while (*ptr && isdigit(*ptr)) /* process digits */
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{
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int64 newtmp = tmp * 10 + (*ptr++ - '0');
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if ((newtmp / 10) != tmp) /* overflow? */
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elog(ERROR, "int8 value out of range: \"%s\"", str);
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tmp = newtmp;
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}
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if (*ptr) /* trailing junk? */
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elog(ERROR, "Bad int8 external representation \"%s\"", str);
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result = (sign < 0) ? -tmp : tmp;
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PG_RETURN_INT64(result);
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}
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/* int8out()
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*/
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Datum
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int8out(PG_FUNCTION_ARGS)
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{
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int64 val = PG_GETARG_INT64(0);
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char *result;
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int len;
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char buf[MAXINT8LEN + 1];
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if ((len = snprintf(buf, MAXINT8LEN, INT64_FORMAT, val)) < 0)
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elog(ERROR, "Unable to format int8");
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result = pstrdup(buf);
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PG_RETURN_CSTRING(result);
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}
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/*----------------------------------------------------------
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* Relational operators for int8s.
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*---------------------------------------------------------*/
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/* int8relop()
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* Is val1 relop val2?
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*/
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Datum
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int8eq(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 == val2);
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}
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Datum
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int8ne(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 != val2);
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}
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Datum
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int8lt(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 < val2);
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}
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Datum
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int8gt(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 > val2);
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}
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Datum
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int8le(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 <= val2);
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}
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Datum
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int8ge(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 >= val2);
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}
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/* int84relop()
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* Is 64-bit val1 relop 32-bit val2?
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*/
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Datum
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int84eq(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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PG_RETURN_BOOL(val1 == val2);
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}
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Datum
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int84ne(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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PG_RETURN_BOOL(val1 != val2);
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}
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Datum
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int84lt(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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PG_RETURN_BOOL(val1 < val2);
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}
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Datum
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int84gt(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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PG_RETURN_BOOL(val1 > val2);
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}
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Datum
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int84le(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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PG_RETURN_BOOL(val1 <= val2);
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}
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Datum
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int84ge(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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PG_RETURN_BOOL(val1 >= val2);
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}
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/* int48relop()
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* Is 32-bit val1 relop 64-bit val2?
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*/
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Datum
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int48eq(PG_FUNCTION_ARGS)
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{
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 == val2);
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}
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Datum
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int48ne(PG_FUNCTION_ARGS)
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{
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 != val2);
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}
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Datum
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int48lt(PG_FUNCTION_ARGS)
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{
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 < val2);
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}
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Datum
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int48gt(PG_FUNCTION_ARGS)
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{
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 > val2);
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}
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Datum
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int48le(PG_FUNCTION_ARGS)
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{
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 <= val2);
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}
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Datum
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int48ge(PG_FUNCTION_ARGS)
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{
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_BOOL(val1 >= val2);
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}
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/*----------------------------------------------------------
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* Arithmetic operators on 64-bit integers.
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*---------------------------------------------------------*/
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Datum
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int8um(PG_FUNCTION_ARGS)
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{
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int64 val = PG_GETARG_INT64(0);
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PG_RETURN_INT64(- val);
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}
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Datum
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int8pl(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_INT64(val1 + val2);
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}
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Datum
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int8mi(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_INT64(val1 - val2);
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}
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Datum
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int8mul(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_INT64(val1 * val2);
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}
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Datum
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int8div(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_INT64(val1 / val2);
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}
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/* int8abs()
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* Absolute value
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*/
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Datum
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int8abs(PG_FUNCTION_ARGS)
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{
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int64 arg1 = PG_GETARG_INT64(0);
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PG_RETURN_INT64((arg1 < 0) ? -arg1 : arg1);
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}
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/* int8mod()
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* Modulo operation.
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*/
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Datum
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int8mod(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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int64 result;
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result = val1 / val2;
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result *= val2;
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result = val1 - result;
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PG_RETURN_INT64(result);
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}
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/* int8fac()
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* Factorial
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*/
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Datum
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int8fac(PG_FUNCTION_ARGS)
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{
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int64 arg1 = PG_GETARG_INT64(0);
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int64 result;
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int64 i;
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if (arg1 < 1)
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result = 0;
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else
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for (i = arg1, result = 1; i > 0; --i)
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result *= i;
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PG_RETURN_INT64(result);
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}
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Datum
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int8larger(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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int64 result;
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result = ((val1 > val2) ? val1 : val2);
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PG_RETURN_INT64(result);
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}
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Datum
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int8smaller(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int64 val2 = PG_GETARG_INT64(1);
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int64 result;
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result = ((val1 < val2) ? val1 : val2);
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PG_RETURN_INT64(result);
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}
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Datum
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int84pl(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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PG_RETURN_INT64(val1 + val2);
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}
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Datum
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int84mi(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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PG_RETURN_INT64(val1 - val2);
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}
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Datum
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int84mul(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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PG_RETURN_INT64(val1 * val2);
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}
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Datum
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int84div(PG_FUNCTION_ARGS)
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{
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int64 val1 = PG_GETARG_INT64(0);
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int32 val2 = PG_GETARG_INT32(1);
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PG_RETURN_INT64(val1 / val2);
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}
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Datum
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int48pl(PG_FUNCTION_ARGS)
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{
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_INT64(val1 + val2);
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}
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Datum
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int48mi(PG_FUNCTION_ARGS)
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{
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_INT64(val1 - val2);
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}
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Datum
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int48mul(PG_FUNCTION_ARGS)
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{
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_INT64(val1 * val2);
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}
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Datum
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int48div(PG_FUNCTION_ARGS)
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{
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int32 val1 = PG_GETARG_INT32(0);
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int64 val2 = PG_GETARG_INT64(1);
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PG_RETURN_INT64(val1 / val2);
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}
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/*----------------------------------------------------------
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* Conversion operators.
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*---------------------------------------------------------*/
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Datum
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int48(PG_FUNCTION_ARGS)
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{
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int32 val = PG_GETARG_INT32(0);
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PG_RETURN_INT64((int64) val);
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}
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Datum
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int84(PG_FUNCTION_ARGS)
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{
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int64 val = PG_GETARG_INT64(0);
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int32 result;
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if ((val < INT_MIN) || (val > INT_MAX))
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elog(ERROR, "int8 conversion to int4 is out of range");
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result = (int32) val;
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PG_RETURN_INT32(result);
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}
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Datum
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i8tod(PG_FUNCTION_ARGS)
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{
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int64 val = PG_GETARG_INT64(0);
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float8 result;
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result = val;
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PG_RETURN_FLOAT8(result);
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}
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/* dtoi8()
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* Convert double float to 8-byte integer.
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* Do a range check before the conversion.
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* Note that the comparison probably isn't quite right
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* since we only have ~52 bits of precision in a double float
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* and so subtracting one from a large number gives the large
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* number exactly. However, for some reason the comparison below
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* does the right thing on my i686/linux-rh4.2 box.
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* - thomas 1998-06-16
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*/
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Datum
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dtoi8(PG_FUNCTION_ARGS)
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{
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float8 val = PG_GETARG_FLOAT8(0);
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int64 result;
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if ((val < (-pow(2.0, 63.0) + 1)) || (val > (pow(2.0, 63.0) - 1)))
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elog(ERROR, "Floating point conversion to int64 is out of range");
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result = (int64) val;
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PG_RETURN_INT64(result);
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}
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/* text_int8()
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*/
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Datum
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text_int8(PG_FUNCTION_ARGS)
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{
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text *str = PG_GETARG_TEXT_P(0);
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int len;
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char *s;
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Datum result;
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len = (VARSIZE(str) - VARHDRSZ);
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s = palloc(len + 1);
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memcpy(s, VARDATA(str), len);
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*(s + len) = '\0';
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result = DirectFunctionCall1(int8in, CStringGetDatum(s));
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pfree(s);
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return result;
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}
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/* int8_text()
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*/
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Datum
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int8_text(PG_FUNCTION_ARGS)
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{
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/* val is int64, but easier to leave it as Datum */
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Datum val = PG_GETARG_DATUM(0);
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char *s;
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int len;
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text *result;
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s = DatumGetCString(DirectFunctionCall1(int8out, val));
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len = strlen(s);
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result = (text *) palloc(VARHDRSZ + len);
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VARSIZE(result) = len + VARHDRSZ;
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memcpy(VARDATA(result), s, len);
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pfree(s);
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PG_RETURN_TEXT_P(result);
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}
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