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.
