diff options
Diffstat (limited to 'gcc-4.7/gcc/ada/i-pacdec.adb')
-rw-r--r-- | gcc-4.7/gcc/ada/i-pacdec.adb | 352 |
1 files changed, 0 insertions, 352 deletions
diff --git a/gcc-4.7/gcc/ada/i-pacdec.adb b/gcc-4.7/gcc/ada/i-pacdec.adb deleted file mode 100644 index bb6c21a07..000000000 --- a/gcc-4.7/gcc/ada/i-pacdec.adb +++ /dev/null @@ -1,352 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT COMPILER COMPONENTS -- --- -- --- I N T E R F A C E S . P A C K E D _ D E C I M A L -- --- -- --- B o d y -- --- (Version for IBM Mainframe Packed Decimal Format) -- --- -- --- Copyright (C) 1992-2009, Free Software Foundation, Inc. -- --- -- --- GNAT is free software; you can redistribute it and/or modify it under -- --- terms of the GNU General Public License as published by the Free Soft- -- --- ware Foundation; either version 3, or (at your option) any later ver- -- --- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- --- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- --- or FITNESS FOR A PARTICULAR PURPOSE. -- --- -- --- As a special exception under Section 7 of GPL version 3, you are granted -- --- additional permissions described in the GCC Runtime Library Exception, -- --- version 3.1, as published by the Free Software Foundation. -- --- -- --- You should have received a copy of the GNU General Public License and -- --- a copy of the GCC Runtime Library Exception along with this program; -- --- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- --- <http://www.gnu.org/licenses/>. -- --- -- --- GNAT was originally developed by the GNAT team at New York University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - -with System; use System; - -with Ada.Unchecked_Conversion; - -package body Interfaces.Packed_Decimal is - - type Packed is array (Byte_Length) of Unsigned_8; - -- The type used internally to represent packed decimal - - type Packed_Ptr is access Packed; - function To_Packed_Ptr is - new Ada.Unchecked_Conversion (Address, Packed_Ptr); - - -- The following array is used to convert a value in the range 0-99 to - -- a packed decimal format with two hexadecimal nibbles. It is worth - -- using table look up in this direction because divides are expensive. - - Packed_Byte : constant array (00 .. 99) of Unsigned_8 := - (16#00#, 16#01#, 16#02#, 16#03#, 16#04#, - 16#05#, 16#06#, 16#07#, 16#08#, 16#09#, - 16#10#, 16#11#, 16#12#, 16#13#, 16#14#, - 16#15#, 16#16#, 16#17#, 16#18#, 16#19#, - 16#20#, 16#21#, 16#22#, 16#23#, 16#24#, - 16#25#, 16#26#, 16#27#, 16#28#, 16#29#, - 16#30#, 16#31#, 16#32#, 16#33#, 16#34#, - 16#35#, 16#36#, 16#37#, 16#38#, 16#39#, - 16#40#, 16#41#, 16#42#, 16#43#, 16#44#, - 16#45#, 16#46#, 16#47#, 16#48#, 16#49#, - 16#50#, 16#51#, 16#52#, 16#53#, 16#54#, - 16#55#, 16#56#, 16#57#, 16#58#, 16#59#, - 16#60#, 16#61#, 16#62#, 16#63#, 16#64#, - 16#65#, 16#66#, 16#67#, 16#68#, 16#69#, - 16#70#, 16#71#, 16#72#, 16#73#, 16#74#, - 16#75#, 16#76#, 16#77#, 16#78#, 16#79#, - 16#80#, 16#81#, 16#82#, 16#83#, 16#84#, - 16#85#, 16#86#, 16#87#, 16#88#, 16#89#, - 16#90#, 16#91#, 16#92#, 16#93#, 16#94#, - 16#95#, 16#96#, 16#97#, 16#98#, 16#99#); - - --------------------- - -- Int32_To_Packed -- - --------------------- - - procedure Int32_To_Packed (V : Integer_32; P : System.Address; D : D32) is - PP : constant Packed_Ptr := To_Packed_Ptr (P); - Empty_Nibble : constant Boolean := ((D rem 2) = 0); - B : constant Byte_Length := (D / 2) + 1; - VV : Integer_32 := V; - - begin - -- Deal with sign byte first - - if VV >= 0 then - PP (B) := Unsigned_8 (VV rem 10) * 16 + 16#C#; - VV := VV / 10; - - else - VV := -VV; - PP (B) := Unsigned_8 (VV rem 10) * 16 + 16#D#; - end if; - - for J in reverse B - 1 .. 2 loop - if VV = 0 then - for K in 1 .. J loop - PP (K) := 16#00#; - end loop; - - return; - - else - PP (J) := Packed_Byte (Integer (VV rem 100)); - VV := VV / 100; - end if; - end loop; - - -- Deal with leading byte - - if Empty_Nibble then - if VV > 9 then - raise Constraint_Error; - else - PP (1) := Unsigned_8 (VV); - end if; - - else - if VV > 99 then - raise Constraint_Error; - else - PP (1) := Packed_Byte (Integer (VV)); - end if; - end if; - - end Int32_To_Packed; - - --------------------- - -- Int64_To_Packed -- - --------------------- - - procedure Int64_To_Packed (V : Integer_64; P : System.Address; D : D64) is - PP : constant Packed_Ptr := To_Packed_Ptr (P); - Empty_Nibble : constant Boolean := ((D rem 2) = 0); - B : constant Byte_Length := (D / 2) + 1; - VV : Integer_64 := V; - - begin - -- Deal with sign byte first - - if VV >= 0 then - PP (B) := Unsigned_8 (VV rem 10) * 16 + 16#C#; - VV := VV / 10; - - else - VV := -VV; - PP (B) := Unsigned_8 (VV rem 10) * 16 + 16#D#; - end if; - - for J in reverse B - 1 .. 2 loop - if VV = 0 then - for K in 1 .. J loop - PP (K) := 16#00#; - end loop; - - return; - - else - PP (J) := Packed_Byte (Integer (VV rem 100)); - VV := VV / 100; - end if; - end loop; - - -- Deal with leading byte - - if Empty_Nibble then - if VV > 9 then - raise Constraint_Error; - else - PP (1) := Unsigned_8 (VV); - end if; - - else - if VV > 99 then - raise Constraint_Error; - else - PP (1) := Packed_Byte (Integer (VV)); - end if; - end if; - - end Int64_To_Packed; - - --------------------- - -- Packed_To_Int32 -- - --------------------- - - function Packed_To_Int32 (P : System.Address; D : D32) return Integer_32 is - PP : constant Packed_Ptr := To_Packed_Ptr (P); - Empty_Nibble : constant Boolean := ((D mod 2) = 0); - B : constant Byte_Length := (D / 2) + 1; - V : Integer_32; - Dig : Unsigned_8; - Sign : Unsigned_8; - J : Positive; - - begin - -- Cases where there is an unused (zero) nibble in the first byte. - -- Deal with the single digit nibble at the right of this byte - - if Empty_Nibble then - V := Integer_32 (PP (1)); - J := 2; - - if V > 9 then - raise Constraint_Error; - end if; - - -- Cases where all nibbles are used - - else - V := 0; - J := 1; - end if; - - -- Loop to process bytes containing two digit nibbles - - while J < B loop - Dig := Shift_Right (PP (J), 4); - - if Dig > 9 then - raise Constraint_Error; - else - V := V * 10 + Integer_32 (Dig); - end if; - - Dig := PP (J) and 16#0F#; - - if Dig > 9 then - raise Constraint_Error; - else - V := V * 10 + Integer_32 (Dig); - end if; - - J := J + 1; - end loop; - - -- Deal with digit nibble in sign byte - - Dig := Shift_Right (PP (J), 4); - - if Dig > 9 then - raise Constraint_Error; - else - V := V * 10 + Integer_32 (Dig); - end if; - - Sign := PP (J) and 16#0F#; - - -- Process sign nibble (deal with most common cases first) - - if Sign = 16#C# then - return V; - - elsif Sign = 16#D# then - return -V; - - elsif Sign = 16#B# then - return -V; - - elsif Sign >= 16#A# then - return V; - - else - raise Constraint_Error; - end if; - end Packed_To_Int32; - - --------------------- - -- Packed_To_Int64 -- - --------------------- - - function Packed_To_Int64 (P : System.Address; D : D64) return Integer_64 is - PP : constant Packed_Ptr := To_Packed_Ptr (P); - Empty_Nibble : constant Boolean := ((D mod 2) = 0); - B : constant Byte_Length := (D / 2) + 1; - V : Integer_64; - Dig : Unsigned_8; - Sign : Unsigned_8; - J : Positive; - - begin - -- Cases where there is an unused (zero) nibble in the first byte. - -- Deal with the single digit nibble at the right of this byte - - if Empty_Nibble then - V := Integer_64 (PP (1)); - J := 2; - - if V > 9 then - raise Constraint_Error; - end if; - - -- Cases where all nibbles are used - - else - J := 1; - V := 0; - end if; - - -- Loop to process bytes containing two digit nibbles - - while J < B loop - Dig := Shift_Right (PP (J), 4); - - if Dig > 9 then - raise Constraint_Error; - else - V := V * 10 + Integer_64 (Dig); - end if; - - Dig := PP (J) and 16#0F#; - - if Dig > 9 then - raise Constraint_Error; - else - V := V * 10 + Integer_64 (Dig); - end if; - - J := J + 1; - end loop; - - -- Deal with digit nibble in sign byte - - Dig := Shift_Right (PP (J), 4); - - if Dig > 9 then - raise Constraint_Error; - else - V := V * 10 + Integer_64 (Dig); - end if; - - Sign := PP (J) and 16#0F#; - - -- Process sign nibble (deal with most common cases first) - - if Sign = 16#C# then - return V; - - elsif Sign = 16#D# then - return -V; - - elsif Sign = 16#B# then - return -V; - - elsif Sign >= 16#A# then - return V; - - else - raise Constraint_Error; - end if; - end Packed_To_Int64; - -end Interfaces.Packed_Decimal; |