mirror of
https://github.com/postgres/postgres.git
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343 lines
8.7 KiB
C
343 lines
8.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* int.c--
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* Functions for the built-in integer types.
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/utils/adt/int.c,v 1.2 1996/11/06 06:49:49 scrappy Exp $
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*
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*-------------------------------------------------------------------------
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*/
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/*
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* OLD COMMENTS
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* I/O routines:
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* int2in, int2out, int28in, int28out, int4in, int4out
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* Conversion routines:
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* itoi
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* Boolean operators:
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* inteq, intne, intlt, intle, intgt, intge
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* Arithmetic operators:
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* intpl, intmi, int4mul, intdiv
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*
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* Arithmetic operators:
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* intmod, int4fac
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*
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* XXX makes massive and possibly unwarranted type promotion assumptions.
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* fix me when we figure out what we want to do about ANSIfication...
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*/
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#include "postgres.h"
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#include "fmgr.h"
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#include "utils/builtins.h" /* where the declarations go */
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#include "utils/palloc.h"
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/*****************************************************************************
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* USER I/O ROUTINES *
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*****************************************************************************/
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/*
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* int2in - converts "num" to short
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*/
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int32 int2in(char *num)
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{
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return((int32) pg_atoi(num, sizeof(int16), '\0'));
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}
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/*
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* int2out - converts short to "num"
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*/
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char *int2out(int16 sh)
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{
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char *result;
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result = (char *)palloc(7); /* assumes sign, 5 digits, '\0' */
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itoa((int) sh, result);
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return(result);
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}
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/*
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* int28in - converts "num num ..." to internal form
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*
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* Note:
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* Fills any nonexistent digits with NULLs.
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*/
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int16 *int28in(char *shs)
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{
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register int16 (*result)[];
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int nums;
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if (shs == NULL)
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return(NULL);
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result = (int16 (*)[]) palloc(sizeof(int16 [8]));
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if ((nums = sscanf(shs, "%hd%hd%hd%hd%hd%hd%hd%hd",
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*result,
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*result + 1,
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*result + 2,
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*result + 3,
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*result + 4,
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*result + 5,
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*result + 6,
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*result + 7)) != 8) {
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do
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(*result)[nums++] = 0;
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while (nums < 8);
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}
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return((int16 *) result);
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}
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/*
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* int28out - converts internal form to "num num ..."
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*/
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char *int28out(int16 (*shs)[])
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{
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register int num;
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register int16 *sp;
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register char *rp;
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char *result;
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if (shs == NULL) {
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result = (char *)palloc(2);
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result[0] = '-';
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result[1] = '\0';
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return(result);
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}
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rp = result = (char *)palloc(8 * 7); /* assumes sign, 5 digits, ' ' */
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sp = *shs;
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for (num = 8; num != 0; num--) {
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itoa(*sp++, rp);
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while (*++rp != '\0')
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;
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*rp++ = ' ';
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}
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*--rp = '\0';
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return(result);
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}
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/*
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* int28in - converts "num num ..." to internal form
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*
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* Note:
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* Fills any nonexistent digits with NULLs.
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*/
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int32 *int44in(char *input_string)
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{
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int32 *foo = (int32 *)palloc(4*sizeof(int32));
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register int i = 0;
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i = sscanf(input_string,
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"%d, %d, %d, %d",
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&foo[0],
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&foo[1],
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&foo[2],
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&foo[3]);
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while (i < 4)
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foo[i++] = 0;
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return(foo);
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}
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/*
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* int28out - converts internal form to "num num ..."
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*/
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char *int44out(int32 an_array[])
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{
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int temp = 4;
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char *output_string = NULL;
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int i;
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if ( temp > 0 ) {
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char *walk;
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output_string = (char *)palloc(16*temp); /* assume 15 digits + sign */
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walk = output_string;
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for ( i = 0 ; i < temp ; i++ ) {
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itoa(an_array[i],walk);
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while (*++walk != '\0')
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;
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*walk++ = ' ';
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}
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*--walk = '\0';
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}
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return(output_string);
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}
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/*****************************************************************************
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* PUBLIC ROUTINES *
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*****************************************************************************/
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/*
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* int4in - converts "num" to int4
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*/
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int32 int4in(char *num)
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{
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return(pg_atoi(num, sizeof(int32), '\0'));
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}
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/*
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* int4out - converts int4 to "num"
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*/
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char *int4out(int32 l)
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{
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char *result;
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result = (char *)palloc(12); /* assumes sign, 10 digits, '\0' */
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ltoa(l, result);
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return(result);
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}
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/*
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* ===================
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* CONVERSION ROUTINES
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* ===================
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*/
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int32 i2toi4(int16 arg1)
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{
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return((int32) arg1);
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}
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int16 i4toi2(int32 arg1)
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{
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if (arg1< -0x8000)
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elog(NOTICE, "i4toi2: \"%d\" causes int2 underflow", arg1);
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if (arg1 > 0x7FFF)
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elog(NOTICE, "i4toi2: \"%d\" causes int2 overflow", arg1);
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return((int16) arg1);
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}
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/*
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* =========================
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* BOOLEAN OPERATOR ROUTINES
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* =========================
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*/
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/*
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* inteq - returns 1 iff arg1 == arg2
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* intne - returns 1 iff arg1 != arg2
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* intlt - returns 1 iff arg1 < arg2
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* intle - returns 1 iff arg1 <= arg2
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* intgt - returns 1 iff arg1 > arg2
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* intge - returns 1 iff arg1 >= arg2
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*/
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int32 int4eq(int32 arg1, int32 arg2) { return(arg1 == arg2); }
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int32 int4ne(int32 arg1, int32 arg2) { return(arg1 != arg2); }
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int32 int4lt(int32 arg1, int32 arg2) { return(arg1 < arg2); }
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int32 int4le(int32 arg1, int32 arg2) { return(arg1 <= arg2); }
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int32 int4gt(int32 arg1, int32 arg2) { return(arg1 > arg2); }
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int32 int4ge(int32 arg1, int32 arg2) { return(arg1 >= arg2); }
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int32 int2eq(int16 arg1, int16 arg2) { return(arg1 == arg2); }
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int32 int2ne(int16 arg1, int16 arg2) { return(arg1 != arg2); }
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int32 int2lt(int16 arg1, int16 arg2) { return(arg1 < arg2); }
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int32 int2le(int16 arg1, int16 arg2) { return(arg1 <= arg2); }
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int32 int2gt(int16 arg1, int16 arg2) { return(arg1 > arg2); }
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int32 int2ge(int16 arg1, int16 arg2) { return(arg1 >= arg2); }
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int32 int24eq(int32 arg1, int32 arg2) { return(arg1 == arg2); }
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int32 int24ne(int32 arg1, int32 arg2) { return(arg1 != arg2); }
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int32 int24lt(int32 arg1, int32 arg2) { return(arg1 < arg2); }
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int32 int24le(int32 arg1, int32 arg2) { return(arg1 <= arg2); }
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int32 int24gt(int32 arg1, int32 arg2) { return(arg1 > arg2); }
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int32 int24ge(int32 arg1, int32 arg2) { return(arg1 >= arg2); }
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int32 int42eq(int32 arg1, int32 arg2) { return(arg1 == arg2); }
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int32 int42ne(int32 arg1, int32 arg2) { return(arg1 != arg2); }
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int32 int42lt(int32 arg1, int32 arg2) { return(arg1 < arg2); }
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int32 int42le(int32 arg1, int32 arg2) { return(arg1 <= arg2); }
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int32 int42gt(int32 arg1, int32 arg2) { return(arg1 > arg2); }
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int32 int42ge(int32 arg1, int32 arg2) { return(arg1 >= arg2); }
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int32 keyfirsteq(int16 *arg1, int16 arg2) { return(*arg1 == arg2); }
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/*
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* int[24]pl - returns arg1 + arg2
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* int[24]mi - returns arg1 - arg2
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* int[24]mul - returns arg1 * arg2
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* int[24]div - returns arg1 / arg2
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*/
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int32 int4um(int32 arg) { return(-arg); }
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int32 int4pl(int32 arg1, int32 arg2) { return(arg1 + arg2); }
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int32 int4mi(int32 arg1, int32 arg2) { return(arg1 - arg2); }
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int32 int4mul(int32 arg1, int32 arg2) { return(arg1 * arg2); }
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int32 int4div(int32 arg1, int32 arg2) { return(arg1 / arg2); }
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int32 int4inc(int32 arg) { return(arg + (int32)1); }
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int16 int2um(int16 arg) { return(-arg); }
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int16 int2pl(int16 arg1, int16 arg2) { return(arg1 + arg2); }
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int16 int2mi(int16 arg1, int16 arg2) { return(arg1 - arg2); }
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int16 int2mul(int16 arg1, int16 arg2) { return(arg1 * arg2); }
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int16 int2div(int16 arg1, int16 arg2) { return(arg1 / arg2); }
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int16 int2inc(int16 arg) { return(arg + (int16)1); }
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int32 int24pl(int32 arg1, int32 arg2) { return(arg1 + arg2); }
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int32 int24mi(int32 arg1, int32 arg2) { return(arg1 - arg2); }
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int32 int24mul(int32 arg1, int32 arg2) { return(arg1 * arg2); }
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int32 int24div(int32 arg1, int32 arg2) { return(arg1 / arg2); }
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int32 int42pl(int32 arg1, int32 arg2) { return(arg1 + arg2); }
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int32 int42mi(int32 arg1, int32 arg2) { return(arg1 - arg2); }
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int32 int42mul(int32 arg1, int32 arg2) { return(arg1 * arg2); }
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int32 int42div(int32 arg1, int32 arg2) { return(arg1 / arg2); }
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/*
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* int[24]mod - returns arg1 mod arg2
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*/
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int32 int4mod(int32 arg1, int32 arg2) { return(arg1 % arg2); }
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int32 int2mod(int16 arg1, int16 arg2) { return(arg1 % arg2); }
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int32 int24mod(int32 arg1, int32 arg2) { return(arg1 % arg2); }
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int32 int42mod(int32 arg1, int32 arg2) { return(arg1 % arg2); }
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/*
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* int[24]fac - returns arg1!
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*/
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int32 int4fac(int32 arg1)
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{
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int32 result;
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if (arg1 < 1)
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result = 0;
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else
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for (result = 1; arg1 > 0; --arg1)
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result *= arg1;
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return(result);
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}
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int32 int2fac(int16 arg1)
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{
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int16 result;
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if (arg1 < 1)
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result = 0;
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else
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for (result = 1; arg1 > 0; --arg1)
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result *= arg1;
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return(result);
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}
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int16 int2larger(int16 arg1, int16 arg2)
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{
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return ((arg1 > arg2) ? arg1 : arg2);
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}
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int16 int2smaller(int16 arg1, int16 arg2)
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{
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return ((arg1 < arg2) ? arg1 : arg2);
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}
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int32 int4larger(int32 arg1, int32 arg2)
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{
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return ((arg1 > arg2) ? arg1 : arg2);
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}
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int32 int4smaller(int32 arg1, int32 arg2)
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{
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return ((arg1 < arg2) ? arg1 : arg2);
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}
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