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Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-imgdec.adb')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/s-imgdec.adb | 357 |
1 files changed, 0 insertions, 357 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-imgdec.adb b/gcc-4.2.1/gcc/ada/s-imgdec.adb deleted file mode 100644 index 34bd68b9e..000000000 --- a/gcc-4.2.1/gcc/ada/s-imgdec.adb +++ /dev/null @@ -1,357 +0,0 @@ ------------------------------------------------------------------------------- --- -- --- GNAT RUN-TIME COMPONENTS -- --- -- --- S Y S T E M . I M G _ D E C -- --- -- --- B o d y -- --- -- --- Copyright (C) 1992-2005 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 2, 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. See the GNU General Public License -- --- for more details. You should have received a copy of the GNU General -- --- Public License distributed with GNAT; see file COPYING. If not, write -- --- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- --- Boston, MA 02110-1301, USA. -- --- -- --- As a special exception, if other files instantiate generics from this -- --- unit, or you link this unit with other files to produce an executable, -- --- this unit does not by itself cause the resulting executable to be -- --- covered by the GNU General Public License. This exception does not -- --- however invalidate any other reasons why the executable file might be -- --- covered by the GNU Public License. -- --- -- --- GNAT was originally developed by the GNAT team at New York University. -- --- Extensive contributions were provided by Ada Core Technologies Inc. -- --- -- ------------------------------------------------------------------------------- - -with System.Img_Int; use System.Img_Int; - -package body System.Img_Dec is - - ------------------- - -- Image_Decimal -- - ------------------- - - function Image_Decimal - (V : Integer; - Scale : Integer) - return String - is - P : Natural := 0; - S : String (1 .. 64); - - begin - Set_Image_Decimal (V, S, P, Scale, 1, Integer'Max (1, Scale), 0); - - -- Mess around to make sure we have the objectionable space at the - -- start for positive numbers in accordance with the annoying rules! - - if S (1) /= ' ' and then S (1) /= '-' then - S (2 .. P + 1) := S (1 .. P); - S (1) := ' '; - return S (1 .. P + 1); - else - return S (1 .. P); - end if; - end Image_Decimal; - - ------------------------ - -- Set_Decimal_Digits -- - ------------------------ - - procedure Set_Decimal_Digits - (Digs : in out String; - NDigs : Natural; - S : out String; - P : in out Natural; - Scale : Integer; - Fore : Natural; - Aft : Natural; - Exp : Natural) - is - Minus : constant Boolean := (Digs (1) = '-'); - -- Set True if input is negative - - Zero : Boolean := (Digs (2) = '0'); - -- Set True if input is exactly zero (only case when a leading zero - -- is permitted in the input string given to this procedure). This - -- flag can get set later if rounding causes the value to become zero. - - FD : Natural := 2; - -- First digit position of digits remaining to be processed - - LD : Natural := NDigs; - -- Last digit position of digits remaining to be processed - - ND : Natural := NDigs - 1; - -- Number of digits remaining to be processed (LD - FD + 1) - - Digits_Before_Point : Integer := ND - Scale; - -- Number of digits before decimal point in the input value. This - -- value can be negative if the input value is less than 0.1, so - -- it is an indication of the current exponent. Digits_Before_Point - -- is adjusted if the rounding step generates an extra digit. - - Digits_After_Point : constant Natural := Integer'Max (1, Aft); - -- Digit positions after decimal point in result string - - Expon : Integer; - -- Integer value of exponent - - procedure Round (N : Natural); - -- Round the number in Digs. N is the position of the last digit to be - -- retained in the rounded position (rounding is based on Digs (N + 1) - -- FD, LD, ND are reset as necessary if required. Note that if the - -- result value rounds up (e.g. 9.99 => 10.0), an extra digit can be - -- placed in the sign position as a result of the rounding, this is - -- the case in which FD is adjusted. - - procedure Set (C : Character); - pragma Inline (Set); - -- Sets character C in output buffer - - procedure Set_Blanks_And_Sign (N : Integer); - -- Sets leading blanks and minus sign if needed. N is the number of - -- positions to be filled (a minus sign is output even if N is zero - -- or negative, For a positive value, if N is non-positive, then - -- a leading blank is filled. - - procedure Set_Digits (S, E : Natural); - pragma Inline (Set_Digits); - -- Set digits S through E from Digs, no effect if S > E - - procedure Set_Zeroes (N : Integer); - pragma Inline (Set_Zeroes); - -- Set N zeroes, no effect if N is negative - - procedure Round (N : Natural) is - D : Character; - - begin - -- Nothing to do if rounding at or past last digit - - if N >= LD then - return; - - -- Cases of rounding before the initial digit - - elsif N < FD then - - -- The result is zero, unless we are rounding just before - -- the first digit, and the first digit is five or more. - - if N = 1 and then Digs (2) >= '5' then - Digs (1) := '1'; - else - Digs (1) := '0'; - Zero := True; - end if; - - Digits_Before_Point := Digits_Before_Point + 1; - FD := 1; - LD := 1; - ND := 1; - - -- Normal case of rounding an existing digit - - else - LD := N; - ND := LD - 1; - - if Digs (N + 1) >= '5' then - for J in reverse 2 .. N loop - D := Character'Succ (Digs (J)); - - if D <= '9' then - Digs (J) := D; - return; - else - Digs (J) := '0'; - end if; - end loop; - - -- Here the rounding overflows into the sign position. That's - -- OK, because we already captured the value of the sign and - -- we are in any case destroying the value in the Digs buffer - - Digs (1) := '1'; - FD := 1; - ND := ND + 1; - Digits_Before_Point := Digits_Before_Point + 1; - end if; - end if; - end Round; - - procedure Set (C : Character) is - begin - P := P + 1; - S (P) := C; - end Set; - - procedure Set_Blanks_And_Sign (N : Integer) is - W : Integer := N; - - begin - if Minus then - W := W - 1; - - for J in 1 .. W loop - Set (' '); - end loop; - - Set ('-'); - - else - for J in 1 .. W loop - Set (' '); - end loop; - end if; - end Set_Blanks_And_Sign; - - procedure Set_Digits (S, E : Natural) is - begin - for J in S .. E loop - Set (Digs (J)); - end loop; - end Set_Digits; - - procedure Set_Zeroes (N : Integer) is - begin - for J in 1 .. N loop - Set ('0'); - end loop; - end Set_Zeroes; - - -- Start of processing for Set_Decimal_Digits - - begin - -- Case of exponent given - - if Exp > 0 then - Set_Blanks_And_Sign (Fore - 1); - Round (Aft + 2); - Set (Digs (FD)); - FD := FD + 1; - ND := ND - 1; - Set ('.'); - - if ND >= Digits_After_Point then - Set_Digits (FD, FD + Digits_After_Point - 1); - - else - Set_Digits (FD, LD); - Set_Zeroes (Digits_After_Point - ND); - end if; - - -- Calculate exponent. The number of digits before the decimal point - -- in the input is Digits_Before_Point, and the number of digits - -- before the decimal point in the output is 1, so we can get the - -- exponent as the difference between these two values. The one - -- exception is for the value zero, which by convention has an - -- exponent of +0. - - if Zero then - Expon := 0; - else - Expon := Digits_Before_Point - 1; - end if; - - Set ('E'); - ND := 0; - - if Expon >= 0 then - Set ('+'); - Set_Image_Integer (Expon, Digs, ND); - else - Set ('-'); - Set_Image_Integer (-Expon, Digs, ND); - end if; - - Set_Zeroes (Exp - ND - 1); - Set_Digits (1, ND); - return; - - -- Case of no exponent given. To make these cases clear, we use - -- examples. For all the examples, we assume Fore = 2, Aft = 3. - -- A P in the example input string is an implied zero position, - -- not included in the input string. - - else - -- Round at correct position - -- Input: 4PP => unchanged - -- Input: 400.03 => unchanged - -- Input 3.4567 => 3.457 - -- Input: 9.9999 => 10.000 - -- Input: 0.PPP5 => 0.001 - -- Input: 0.PPP4 => 0 - -- Input: 0.00003 => 0 - - Round (LD - (Scale - Digits_After_Point)); - - -- No digits before point in input - -- Input: .123 Output: 0.123 - -- Input: .PP3 Output: 0.003 - - if Digits_Before_Point <= 0 then - Set_Blanks_And_Sign (Fore - 1); - Set ('0'); - Set ('.'); - - Set_Zeroes (Digits_After_Point - ND); - Set_Digits (FD, LD); - - -- At least one digit before point in input - - else - Set_Blanks_And_Sign (Fore - Digits_Before_Point); - - -- Less digits in input than are needed before point - -- Input: 1PP Output: 100.000 - - if ND < Digits_Before_Point then - Set_Digits (FD, LD); - Set_Zeroes (Digits_Before_Point - ND); - Set ('.'); - Set_Zeroes (Digits_After_Point); - - -- Input has full amount of digits before decimal point - - else - Set_Digits (FD, FD + Digits_Before_Point - 1); - Set ('.'); - Set_Digits (FD + Digits_Before_Point, LD); - Set_Zeroes (Digits_After_Point - (ND - Digits_Before_Point)); - end if; - end if; - end if; - - end Set_Decimal_Digits; - - ----------------------- - -- Set_Image_Decimal -- - ----------------------- - - procedure Set_Image_Decimal - (V : Integer; - S : out String; - P : in out Natural; - Scale : Integer; - Fore : Natural; - Aft : Natural; - Exp : Natural) - is - Digs : String := Image_Integer (V); - -- Sign and digits of decimal value - - begin - Set_Decimal_Digits (Digs, Digs'Length, S, P, Scale, Fore, Aft, Exp); - end Set_Image_Decimal; - -end System.Img_Dec; |