/* Decimal floating point support for GDB.
- Copyright 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+ Copyright (C) 2007-2017 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "expression.h"
-#include "gdbtypes.h"
-#include "value.h"
#include "dfp.h"
/* The order of the following headers is important for making sure
#include "dpd/decimal64.h"
#include "dpd/decimal32.h"
+/* When using decimal128, this is the maximum string length + 1
+ (value comes from libdecnumber's DECIMAL128_String constant). */
+#define MAX_DECIMAL_STRING 43
+
/* In GDB, we are using an array of gdb_byte to represent decimal values.
They are stored in host byte order. This routine does the conversion if
the target byte order is different. */
{
/* Leave only the error bits in the status flags. */
ctx->status &= DEC_IEEE_854_Invalid_operation;
- error (_("Cannot perform operation: %s"), decContextStatusToString (ctx));
+ error (_("Cannot perform operation: %s"),
+ decContextStatusToString (ctx));
}
}
decimal128ToNumber ((decimal128 *) from, to);
break;
default:
- error (_("Unknown decimal floating point type.\n"));
+ error (_("Unknown decimal floating point type."));
break;
}
}
/* Convert decimal type to its string representation. LEN is the length
of the decimal type, 4 bytes for decimal32, 8 bytes for decimal64 and
16 bytes for decimal128. */
-void
+std::string
decimal_to_string (const gdb_byte *decbytes, int len,
- enum bfd_endian byte_order, char *s)
+ enum bfd_endian byte_order)
{
gdb_byte dec[16];
match_endianness (decbytes, len, byte_order, dec);
+ std::string result;
+ result.resize (MAX_DECIMAL_STRING);
+
switch (len)
{
case 4:
- decimal32ToString ((decimal32 *) dec, s);
+ decimal32ToString ((decimal32 *) dec, &result[0]);
break;
case 8:
- decimal64ToString ((decimal64 *) dec, s);
+ decimal64ToString ((decimal64 *) dec, &result[0]);
break;
case 16:
- decimal128ToString ((decimal128 *) dec, s);
+ decimal128ToString ((decimal128 *) dec, &result[0]);
break;
default:
error (_("Unknown decimal floating point type."));
break;
}
+
+ return result;
}
/* Convert the string form of a decimal value to its decimal representation.
LEN is the length of the decimal type, 4 bytes for decimal32, 8 bytes for
decimal64 and 16 bytes for decimal128. */
-int
+bool
decimal_from_string (gdb_byte *decbytes, int len, enum bfd_endian byte_order,
- const char *string)
+ std::string string)
{
decContext set;
gdb_byte dec[16];
switch (len)
{
case 4:
- decimal32FromString ((decimal32 *) dec, string, &set);
+ decimal32FromString ((decimal32 *) dec, string.c_str (), &set);
break;
case 8:
- decimal64FromString ((decimal64 *) dec, string, &set);
+ decimal64FromString ((decimal64 *) dec, string.c_str (), &set);
break;
case 16:
- decimal128FromString ((decimal128 *) dec, string, &set);
+ decimal128FromString ((decimal128 *) dec, string.c_str (), &set);
break;
default:
error (_("Unknown decimal floating point type."));
/* Check for errors in the DFP operation. */
decimal_check_errors (&set);
- return 1;
+ return true;
}
-/* Converts a value of an integral type to a decimal float of
- specified LEN bytes. */
+/* Converts a LONGEST to a decimal float of specified LEN bytes. */
void
-decimal_from_integral (struct value *from,
- gdb_byte *to, int len, enum bfd_endian byte_order)
+decimal_from_longest (LONGEST from,
+ gdb_byte *to, int len, enum bfd_endian byte_order)
{
- LONGEST l;
gdb_byte dec[16];
decNumber number;
- struct type *type;
+ if ((int32_t) from != from)
+ /* libdecnumber can convert only 32-bit integers. */
+ error (_("Conversion of large integer to a "
+ "decimal floating type is not supported."));
- type = check_typedef (value_type (from));
+ decNumberFromInt32 (&number, (int32_t) from);
- if (TYPE_LENGTH (type) > 4)
- /* libdecnumber can convert only 32-bit integers. */
- error (_("Conversion of large integer to a decimal floating type is not supported."));
+ decimal_from_number (&number, dec, len);
+ match_endianness (dec, len, byte_order, to);
+}
- l = value_as_long (from);
+/* Converts a ULONGEST to a decimal float of specified LEN bytes. */
+void
+decimal_from_ulongest (ULONGEST from,
+ gdb_byte *to, int len, enum bfd_endian byte_order)
+{
+ gdb_byte dec[16];
+ decNumber number;
- if (TYPE_UNSIGNED (type))
- decNumberFromUInt32 (&number, (unsigned int) l);
- else
- decNumberFromInt32 (&number, (int) l);
+ if ((uint32_t) from != from)
+ /* libdecnumber can convert only 32-bit integers. */
+ error (_("Conversion of large integer to a "
+ "decimal floating type is not supported."));
+
+ decNumberFromUInt32 (&number, (uint32_t) from);
decimal_from_number (&number, dec, len);
match_endianness (dec, len, byte_order, to);
}
+/* Converts a decimal float of LEN bytes to a LONGEST. */
+LONGEST
+decimal_to_longest (const gdb_byte *from, int len, enum bfd_endian byte_order)
+{
+ /* libdecnumber has a function to convert from decimal to integer, but
+ it doesn't work when the decimal number has a fractional part. */
+ std::string str = decimal_to_string (from, len, byte_order);
+ return strtoll (str.c_str (), NULL, 10);
+}
+
/* Converts a value of a float type to a decimal float of
specified LEN bytes.
This is an ugly way to do the conversion, but libdecnumber does
not offer a direct way to do it. */
void
-decimal_from_floating (struct value *from,
+decimal_from_doublest (DOUBLEST from,
gdb_byte *to, int len, enum bfd_endian byte_order)
{
- char *buffer;
-
- buffer = xstrprintf ("%.30" DOUBLEST_PRINT_FORMAT, value_as_double (from));
-
- decimal_from_string (to, len, byte_order, buffer);
-
- xfree (buffer);
+ std::string str = string_printf ("%.30" DOUBLEST_PRINT_FORMAT, from);
+ decimal_from_string (to, len, byte_order, str);
}
/* Converts a decimal float of LEN bytes to a double value. */
DOUBLEST
decimal_to_doublest (const gdb_byte *from, int len, enum bfd_endian byte_order)
{
- char buffer[MAX_DECIMAL_STRING];
-
/* This is an ugly way to do the conversion, but libdecnumber does
not offer a direct way to do it. */
- decimal_to_string (from, len, byte_order, buffer);
- return strtod (buffer, NULL);
+ std::string str = decimal_to_string (from, len, byte_order);
+ return strtod (str.c_str (), NULL);
}
/* Perform operation OP with operands X and Y with sizes LEN_X and LEN_Y
projects / deliverable / binutils-gdb.git / blobdiff