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- /* Copyright (c) 1990 UNIX System Laboratories, Inc. */
- /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */
- /* All Rights Reserved */
-
- /* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF */
- /* UNIX System Laboratories, Inc. */
- /* The copyright notice above does not evidence any */
- /* actual or intended publication of such source code. */
-
-
- #ident "@(#)//usr/ucbinclude/fp.h.sl 1.1 4.0 12/08/90 26136 AT&T-USL"
-
- /*******************************************************************
-
- PROPRIETARY NOTICE (Combined)
-
- This source code is unpublished proprietary information
- constituting, or derived under license from AT&T's UNIX(r) System V.
- In addition, portions of such source code were derived from Berkeley
- 4.3 BSD under license from the Regents of the University of
- California.
-
-
-
- Copyright Notice
-
- Notice of copyright on this source code product does not indicate
- publication.
-
- (c) 1986,1987,1988,1989 Sun Microsystems, Inc
- (c) 1983,1984,1985,1986,1987,1988,1989 AT&T.
- All rights reserved.
- ********************************************************************/
-
- /*
- * IEEE floating-point definitions for constants, types, variables, and
- * functions implemented in libc.a for: IEEE floating-point arithmetic base
- * conversion; IEEE floating-point arithmetic modes; IEEE floating-point
- * arithmetic exception handling; certain functions defined in 4.3 BSD and
- * System V.
- */
-
- #ifndef _floatingpoint_h
- #define _floatingpoint_h
-
- #include <sys/ieeefp.h>
-
- /* Sun TYPES for IEEE floating point. */
-
- typedef float single;
- typedef unsigned long extended[3]; /* MC68881/i80387 double-extended type. */
- typedef struct {
- unsigned long u[4];
- } quadruple; /* Quadruple-precision type. */
-
- #define N_IEEE_EXCEPTION 5 /* Number of floating-point exceptions. */
-
- typedef unsigned fp_exception_field_type;
- /*
- * A field containing fp_exceptions OR'ed together.
- */
-
- typedef int sigfpe_code_type; /* Type of SIGFPE code. */
-
- typedef void (*sigfpe_handler_type) ();
- /* Pointer to exception handler function. */
-
- #define SIGFPE_DEFAULT (void (*)())0 /* default exception handling */
- #define SIGFPE_IGNORE (void (*)())1 /* ignore this exception or code */
- #define SIGFPE_ABORT (void (*)())2 /* force abort on exception */
-
- /* Sun VARIABLES for IEEE floating point. */
-
- extern enum fp_direction_type fp_direction;
- /*
- * Current rounding direction. Updated by ieee_flags.
- */
-
- extern enum fp_precision_type fp_precision;
- /*
- * Current rounding precision. Updated by ieee_flags.
- */
-
- extern fp_exception_field_type fp_accrued_exceptions;
- /*
- * Sticky accumulated exceptions, updated by ieee_flags. In hardware
- * implementations this variable is not automatically updated as the hardware
- * changes and should therefore not be relied on directly.
- */
-
- /* Sun definitions for base conversion. */
-
- #define DECIMAL_STRING_LENGTH 512
- /* Size of buffer in decimal_record. */
-
- typedef char decimal_string[DECIMAL_STRING_LENGTH];
- /* Decimal significand. */
-
- typedef struct {
- enum fp_class_type fpclass;
- int sign;
- int exponent;
- decimal_string ds; /* Significand - each char contains an ascii
- * digit, except the string-terminating ascii
- * null. */
- int more; /* On conversion from decimal to binary, != 0
- * indicates more non-zero digits following
- * ds. */
- int ndigits;/* On fixed_form conversion from binary to
- * decimal, contains number of digits
- * required for ds. */
- }
- decimal_record;
-
- enum decimal_form {
- fixed_form, /* Fortran F format: ndigits specifies number
- * of digits after point; if negative,
- * specifies rounding to occur to left of
- * point. */
- floating_form /* Fortran E format: ndigits specifies number
- * of significant digits. */
- };
-
- typedef struct {
- enum fp_direction_type rd;
- /* Rounding direction. */
- enum decimal_form df; /* Format for binary to decimal conversion. */
- int ndigits;/* Number of digits for conversion. */
- }
- decimal_mode;
-
- enum decimal_string_form { /* Valid decimal number string formats. */
- invalid_form, /* Not a valid decimal string format. */
- whitespace_form, /* All white space - valid in Fortran! */
- fixed_int_form, /* <digs> */
- fixed_intdot_form, /* <digs>. */
- fixed_dotfrac_form, /* .<digs> */
- fixed_intdotfrac_form, /* <digs>.<frac> */
- floating_int_form, /* <digs><exp> */
- floating_intdot_form, /* <digs>.<exp> */
- floating_dotfrac_form, /* .<digs><exp> */
- floating_intdotfrac_form, /* <digs>.<digs><exp> */
- inf_form, /* inf */
- infinity_form, /* infinity */
- nan_form, /* nan */
- nanstring_form /* nan(string) */
- };
-
- /* The following externs are used in the implementation of sprintf. */
-
- extern void double_to_decimal();
- extern void quadruple_to_decimal();
- extern char *econvert();
- extern char *fconvert();
- extern char *gconvert();
- extern char *qeconvert();
- extern char *qfconvert();
- extern char *qgconvert();
-
- /*
- The following are used for other parts of base conversion.
- */
-
- extern sigfpe_handler_type ieee_handlers[N_IEEE_EXCEPTION];
- /*
- * Array of pointers to functions to handle SIGFPE's corresponding to IEEE
- * fp_exceptions. sigfpe_default means do not generate SIGFPE. An invalid
- * address such as sigfpe_abort will cause abort on that SIGFPE. Updated by
- * ieee_handler.
- */
-
- extern sigfpe_handler_type sigfpe();
-
- extern void single_to_decimal();
- extern void extended_to_decimal();
-
- extern void decimal_to_single();
- extern void decimal_to_double();
- extern void decimal_to_extended();
- extern void decimal_to_quadruple();
-
- extern char *seconvert();
- extern char *sfconvert();
- extern char *sgconvert();
-
- extern void string_to_decimal();
- extern void file_to_decimal();
- extern void func_to_decimal();
-
- /* Definitions from 4.3 BSD math.h 4.6 9/11/85 */
-
- extern double atof();
-
- /* Definitions from System V */
-
- extern int errno;
-
- extern double strtod();
-
- #endif /* !_floatingpoint_h */
-