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3b4b2f160d
This cleans up a number of interfaces in dfp.c / dfp.h. Specifically: - The decimal_from_string / decimal_to_string routines are C++-ified to operate on std::string instead of character buffers. In the decimal_from_string, the boolean return value now actually is bool instead of an int. - The decimal_from_integral and decimal_from_doublest routines take an struct value as input. This is not really appropriate at the low level the DFP routines sit, so this replaced them with new routines decimal_from_longest / decimal_from_ulongest / decimal_from_doublest that operate on contents instead. - To mirror the decimal_from_[u]longest, a new decimal_to_longest routine is added as well, which can be used in unpack_long to avoid an unnecessary conversion via DOUBLEST. Note that the decimal_from_longest / decimal_from_ulongest routines are actually more powerful than decimal_from_integral: the old routine would only accept integer *types* of at most four bytes size, while the new routines accept all integer *values* that fit in an [u]int32_t, no matter which type they came from. The DFP tests are updated to allow for this larger range of integers that can be converted. gdb/ChangeLog: 2017-10-05 Ulrich Weigand <uweigand@de.ibm.com> * dfp.h (MAX_DECIMAL_STRING): Move to dfp.c. (decimal_to_string): Return std::string object. (decimal_from_string): Accept std::string object. Return bool. (decimal_from_integral, decimal_from_doublest): Remove. (decimal_from_longest): Add prototype. (decimal_from_ulongest): Likewise. (decimal_to_longest): Likewise. (decimal_from_doublest): Likewise. * dfp.c: Do not include "gdbtypes.h" or "value.h". (MAX_DECIMAL_STRING): Move here. (decimal_to_string): Return std::string object. (decimal_from_string): Accept std::string object. Return bool. (decimal_from_integral): Remove, replace by ... (decimal_from_longest, decimal_from_ulongest): ... these new functions. (decimal_to_longest): New function. (decimal_from_floating): Remove, replace by ... (decimal_from_doublest): ... this new function. (decimal_to_doublest): Update to new decimal_to_string interface. * value.c (unpack_long): Use decimal_to_longest. * valops.c (value_cast): Use decimal_from_doublest instead of decimal_from_floating. Use decimal_from_[u]longest isntead of decimal_from_integral. * valarith.c (value_args_as_decimal): Likewise. * valprint.c (print_decimal_floating): Update to new decimal_to_string interface. * printcmd.c (printf_decfloat): Likewise. * c-exp.y (parse_number): Update to new decimal_from_string interface. gdb/testsuite/ChangeLog: 2017-10-05 Ulrich Weigand <uweigand@de.ibm.com> * gdb.base/dfp-exprs.exp: Update tests to larger range of supported integer-to-dfp conversion. * gdb.base/dfp-test.exp: Likewise.
55 lines
2.3 KiB
C++
55 lines
2.3 KiB
C++
/* Decimal floating point support for GDB.
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Copyright (C) 2007-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Decimal floating point is one of the extension to IEEE 754, which is
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described in http://grouper.ieee.org/groups/754/revision.html and
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http://www2.hursley.ibm.com/decimal/. It completes binary floating
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point by representing floating point more exactly. */
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#ifndef DFP_H
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#define DFP_H
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#include "doublest.h" /* For DOUBLEST. */
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#include "expression.h" /* For enum exp_opcode. */
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extern std::string decimal_to_string (const gdb_byte *, int, enum bfd_endian);
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extern bool decimal_from_string (gdb_byte *, int, enum bfd_endian,
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std::string string);
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extern void decimal_from_longest (LONGEST from, gdb_byte *to,
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int len, enum bfd_endian byte_order);
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extern void decimal_from_ulongest (ULONGEST from, gdb_byte *to,
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int len, enum bfd_endian byte_order);
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extern LONGEST decimal_to_longest (const gdb_byte *from, int len,
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enum bfd_endian byte_order);
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extern void decimal_from_doublest (DOUBLEST from, gdb_byte *to,
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int len, enum bfd_endian byte_order);
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extern DOUBLEST decimal_to_doublest (const gdb_byte *from, int len,
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enum bfd_endian byte_order);
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extern void decimal_binop (enum exp_opcode,
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const gdb_byte *, int, enum bfd_endian,
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const gdb_byte *, int, enum bfd_endian,
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gdb_byte *, int, enum bfd_endian);
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extern int decimal_is_zero (const gdb_byte *, int, enum bfd_endian);
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extern int decimal_compare (const gdb_byte *, int, enum bfd_endian,
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const gdb_byte *, int, enum bfd_endian);
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extern void decimal_convert (const gdb_byte *, int, enum bfd_endian,
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gdb_byte *, int, enum bfd_endian);
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#endif
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