--- ipmpar.c.orig Tue Sep 8 14:19:45 1998
+++ ipmpar.c Tue Sep 8 14:11:24 1998
@@ -1,426 +1,24 @@
-int ipmpar(int*);
-/*
------------------------------------------------------------------------
-
- IPMPAR PROVIDES THE INTEGER MACHINE CONSTANTS FOR THE COMPUTER
- THAT IS USED. IT IS ASSUMED THAT THE ARGUMENT I IS AN INTEGER
- HAVING ONE OF THE VALUES 1-10. IPMPAR(I) HAS THE VALUE ...
-
- INTEGERS.
-
- ASSUME INTEGERS ARE REPRESENTED IN THE N-DIGIT, BASE-A FORM
-
- SIGN ( X(N-1)*A**(N-1) + ... + X(1)*A + X(0) )
-
- WHERE 0 .LE. X(I) .LT. A FOR I=0,...,N-1.
-
- IPMPAR(1) = A, THE BASE.
-
- IPMPAR(2) = N, THE NUMBER OF BASE-A DIGITS.
-
- IPMPAR(3) = A**N - 1, THE LARGEST MAGNITUDE.
-
- FLOATING-POINT NUMBERS.
-
- IT IS ASSUMED THAT THE SINGLE AND DOUBLE PRECISION FLOATING
- POINT ARITHMETICS HAVE THE SAME BASE, SAY B, AND THAT THE
- NONZERO NUMBERS ARE REPRESENTED IN THE FORM
-
- SIGN (B**E) * (X(1)/B + ... + X(M)/B**M)
-
- WHERE X(I) = 0,1,...,B-1 FOR I=1,...,M,
- X(1) .GE. 1, AND EMIN .LE. E .LE. EMAX.
-
- IPMPAR(4) = B, THE BASE.
-
- SINGLE-PRECISION
-
- IPMPAR(5) = M, THE NUMBER OF BASE-B DIGITS.
-
- IPMPAR(6) = EMIN, THE SMALLEST EXPONENT E.
-
- IPMPAR(7) = EMAX, THE LARGEST EXPONENT E.
-
- DOUBLE-PRECISION
-
- IPMPAR(8) = M, THE NUMBER OF BASE-B DIGITS.
-
- IPMPAR(9) = EMIN, THE SMALLEST EXPONENT E.
-
- IPMPAR(10) = EMAX, THE LARGEST EXPONENT E.
-
------------------------------------------------------------------------
-
- TO DEFINE THIS FUNCTION FOR THE COMPUTER BEING USED REMOVE
- THE COMMENT DELIMITORS FROM THE DEFINITIONS DIRECTLY BELOW THE NAME
- OF THE MACHINE
-
------------------------------------------------------------------------
-
- IPMPAR IS AN ADAPTATION OF THE FUNCTION I1MACH, WRITTEN BY
- P.A. FOX, A.D. HALL, AND N.L. SCHRYER (BELL LABORATORIES).
- IPMPAR WAS FORMED BY A.H. MORRIS (NSWC). THE CONSTANTS ARE
- FROM BELL LABORATORIES, NSWC, AND OTHER SOURCES.
-
------------------------------------------------------------------------
- .. Scalar Arguments ..
-*/
-int ipmpar(int *i)
-{
-static int imach[11];
-static int ipmpar;
-/* MACHINE CONSTANTS FOR AMDAHL MACHINES. */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 16;
- imach[5] = 6;
- imach[6] = -64;
- imach[7] = 63;
- imach[8] = 14;
- imach[9] = -64;
- imach[10] = 63;
-*/
-/* MACHINE CONSTANTS FOR THE AT&T 3B SERIES, AT&T
- PC 7300, AND AT&T 6300. */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -125;
- imach[7] = 128;
- imach[8] = 53;
- imach[9] = -1021;
- imach[10] = 1024;
-*/
-/* MACHINE CONSTANTS FOR THE BURROUGHS 1700 SYSTEM. */
-/*
- imach[1] = 2;
- imach[2] = 33;
- imach[3] = 8589934591;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -256;
- imach[7] = 255;
- imach[8] = 60;
- imach[9] = -256;
- imach[10] = 255;
-*/
-/* MACHINE CONSTANTS FOR THE BURROUGHS 5700 SYSTEM. */
-/*
- imach[1] = 2;
- imach[2] = 39;
- imach[3] = 549755813887;
- imach[4] = 8;
- imach[5] = 13;
- imach[6] = -50;
- imach[7] = 76;
- imach[8] = 26;
- imach[9] = -50;
- imach[10] = 76;
-*/
-/* MACHINE CONSTANTS FOR THE BURROUGHS 6700/7700 SYSTEMS. */
-/*
- imach[1] = 2;
- imach[2] = 39;
- imach[3] = 549755813887;
- imach[4] = 8;
- imach[5] = 13;
- imach[6] = -50;
- imach[7] = 76;
- imach[8] = 26;
- imach[9] = -32754;
- imach[10] = 32780;
-*/
-/* MACHINE CONSTANTS FOR THE CDC 6000/7000 SERIES
- 60 BIT ARITHMETIC, AND THE CDC CYBER 995 64 BIT
- ARITHMETIC (NOS OPERATING SYSTEM). */
-/*
- imach[1] = 2;
- imach[2] = 48;
- imach[3] = 281474976710655;
- imach[4] = 2;
- imach[5] = 48;
- imach[6] = -974;
- imach[7] = 1070;
- imach[8] = 95;
- imach[9] = -926;
- imach[10] = 1070;
-*/
-/* MACHINE CONSTANTS FOR THE CDC CYBER 995 64 BIT
- ARITHMETIC (NOS/VE OPERATING SYSTEM). */
-/*
- imach[1] = 2;
- imach[2] = 63;
- imach[3] = 9223372036854775807;
- imach[4] = 2;
- imach[5] = 48;
- imach[6] = -4096;
- imach[7] = 4095;
- imach[8] = 96;
- imach[9] = -4096;
- imach[10] = 4095;
-*/
-/* MACHINE CONSTANTS FOR THE CRAY 1, XMP, 2, AND 3. */
-/*
- imach[1] = 2;
- imach[2] = 63;
- imach[3] = 9223372036854775807;
- imach[4] = 2;
- imach[5] = 47;
- imach[6] = -8189;
- imach[7] = 8190;
- imach[8] = 94;
- imach[9] = -8099;
- imach[10] = 8190;
-*/
-/* MACHINE CONSTANTS FOR THE DATA GENERAL ECLIPSE S/200. */
-/*
- imach[1] = 2;
- imach[2] = 15;
- imach[3] = 32767;
- imach[4] = 16;
- imach[5] = 6;
- imach[6] = -64;
- imach[7] = 63;
- imach[8] = 14;
- imach[9] = -64;
- imach[10] = 63;
-*/
-/* MACHINE CONSTANTS FOR THE HARRIS 220. */
-/*
- imach[1] = 2;
- imach[2] = 23;
- imach[3] = 8388607;
- imach[4] = 2;
- imach[5] = 23;
- imach[6] = -127;
- imach[7] = 127;
- imach[8] = 38;
- imach[9] = -127;
- imach[10] = 127;
-*/
-/* MACHINE CONSTANTS FOR THE HONEYWELL 600/6000
- AND DPS 8/70 SERIES. */
-/*
- imach[1] = 2;
- imach[2] = 35;
- imach[3] = 34359738367;
- imach[4] = 2;
- imach[5] = 27;
- imach[6] = -127;
- imach[7] = 127;
- imach[8] = 63;
- imach[9] = -127;
- imach[10] = 127;
-*/
-/* MACHINE CONSTANTS FOR THE HP 2100
- 3 WORD DOUBLE PRECISION OPTION WITH FTN4 */
-/*
- imach[1] = 2;
- imach[2] = 15;
- imach[3] = 32767;
- imach[4] = 2;
- imach[5] = 23;
- imach[6] = -128;
- imach[7] = 127;
- imach[8] = 39;
- imach[9] = -128;
- imach[10] = 127;
-*/
-/* MACHINE CONSTANTS FOR THE HP 2100
- 4 WORD DOUBLE PRECISION OPTION WITH FTN4 */
-/*
- imach[1] = 2;
- imach[2] = 15;
- imach[3] = 32767;
- imach[4] = 2;
- imach[5] = 23;
- imach[6] = -128;
- imach[7] = 127;
- imach[8] = 55;
- imach[9] = -128;
- imach[10] = 127;
-*/
-/* MACHINE CONSTANTS FOR THE HP 9000. */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -126;
- imach[7] = 128;
- imach[8] = 53;
- imach[9] = -1021;
- imach[10] = 1024;
-*/
-/* MACHINE CONSTANTS FOR THE IBM 360/370 SERIES,
- THE ICL 2900, THE ITEL AS/6, THE XEROX SIGMA
- 5/7/9 AND THE SEL SYSTEMS 85/86. */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 16;
- imach[5] = 6;
- imach[6] = -64;
- imach[7] = 63;
- imach[8] = 14;
- imach[9] = -64;
- imach[10] = 63;
-*/
-/* MACHINE CONSTANTS FOR THE IBM PC. */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -125;
- imach[7] = 128;
- imach[8] = 53;
- imach[9] = -1021;
- imach[10] = 1024;
-*/
-/* MACHINE CONSTANTS FOR THE MACINTOSH II - ABSOFT
- MACFORTRAN II. */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -125;
- imach[7] = 128;
- imach[8] = 53;
- imach[9] = -1021;
- imach[10] = 1024;
-*/
-/* MACHINE CONSTANTS FOR THE MICROVAX - VMS FORTRAN. */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -127;
- imach[7] = 127;
- imach[8] = 56;
- imach[9] = -127;
- imach[10] = 127;
-*/
-/* MACHINE CONSTANTS FOR THE PDP-10 (KA PROCESSOR). */
-/*
- imach[1] = 2;
- imach[2] = 35;
- imach[3] = 34359738367;
- imach[4] = 2;
- imach[5] = 27;
- imach[6] = -128;
- imach[7] = 127;
- imach[8] = 54;
- imach[9] = -101;
- imach[10] = 127;
-*/
-/* MACHINE CONSTANTS FOR THE PDP-10 (KI PROCESSOR). */
-/*
- imach[1] = 2;
- imach[2] = 35;
- imach[3] = 34359738367;
- imach[4] = 2;
- imach[5] = 27;
- imach[6] = -128;
- imach[7] = 127;
- imach[8] = 62;
- imach[9] = -128;
- imach[10] = 127;
-*/
-/* MACHINE CONSTANTS FOR THE PDP-11 FORTRAN SUPPORTING
- 32-BIT INTEGER ARITHMETIC. */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -127;
- imach[7] = 127;
- imach[8] = 56;
- imach[9] = -127;
- imach[10] = 127;
-*/
-/* MACHINE CONSTANTS FOR THE SEQUENT BALANCE 8000. */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -125;
- imach[7] = 128;
- imach[8] = 53;
- imach[9] = -1021;
- imach[10] = 1024;
-*/
-/* MACHINE CONSTANTS FOR THE SILICON GRAPHICS IRIS-4D
- SERIES (MIPS R3000 PROCESSOR). */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -125;
- imach[7] = 128;
- imach[8] = 53;
- imach[9] = -1021;
- imach[10] = 1024;
-*/
-/* MACHINE CONSTANTS FOR IEEE ARITHMETIC MACHINES, SUCH AS THE AT&T
- 3B SERIES, MOTOROLA 68000 BASED MACHINES (E.G. SUN 3 AND AT&T
- PC 7300), AND 8087 BASED MICROS (E.G. IBM PC AND AT&T 6300). */
-
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -125;
- imach[7] = 128;
- imach[8] = 53;
- imach[9] = -1021;
- imach[10] = 1024;
+#include <float.h>
+#include <limits.h>
-/* MACHINE CONSTANTS FOR THE UNIVAC 1100 SERIES. */
-/*
- imach[1] = 2;
- imach[2] = 35;
- imach[3] = 34359738367;
- imach[4] = 2;
- imach[5] = 27;
- imach[6] = -128;
- imach[7] = 127;
- imach[8] = 60;
- imach[9] = -1024;
- imach[10] = 1023;
-*/
-/* MACHINE CONSTANTS FOR THE VAX 11/780. */
-/*
- imach[1] = 2;
- imach[2] = 31;
- imach[3] = 2147483647;
- imach[4] = 2;
- imach[5] = 24;
- imach[6] = -127;
- imach[7] = 127;
- imach[8] = 56;
- imach[9] = -127;
- imach[10] = 127;
-*/
- ipmpar = imach[*i];
- return ipmpar;
+int ipmpar( int *i)
+{
+ static int imach[11] = {
+ 0, /* dummy zeroth index */
+ /* integers */
+ 2, /* base; you are on the binary machine, aren't you? */
+ sizeof(int)*(CHAR_BIT)-1,
+ INT_MAX,
+ /* all floats */
+ FLT_RADIX,
+ /* single precision floats */
+ FLT_MANT_DIG,
+ FLT_MIN_EXP,
+ FLT_MAX_EXP,
+ /* double precision floats */
+ DBL_MANT_DIG,
+ DBL_MIN_EXP,
+ DBL_MAX_EXP,
+ };
+ return imach[*i];
}
