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Diffstat (limited to 'src/translate/grt/grt-vstrings.adb')
| -rw-r--r-- | src/translate/grt/grt-vstrings.adb | 422 |
1 files changed, 422 insertions, 0 deletions
diff --git a/src/translate/grt/grt-vstrings.adb b/src/translate/grt/grt-vstrings.adb new file mode 100644 index 0000000..30c58ab --- /dev/null +++ b/src/translate/grt/grt-vstrings.adb @@ -0,0 +1,422 @@ +-- GHDL Run Time (GRT) - variable strings. +-- Copyright (C) 2002 - 2014 Tristan Gingold +-- +-- GHDL is free software; you can redistribute it and/or modify it under +-- the terms of the GNU General Public License as published by the Free +-- Software Foundation; either version 2, or (at your option) any later +-- version. +-- +-- GHDL is distributed in the hope that it will be useful, but WITHOUT 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 +-- along with GCC; see the file COPYING. If not, write to the Free +-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA +-- 02111-1307, 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. +with System.Storage_Elements; -- Work around GNAT bug. +pragma Unreferenced (System.Storage_Elements); +with Grt.Errors; use Grt.Errors; +with Grt.C; use Grt.C; + +package body Grt.Vstrings is + procedure Free (Fs : Fat_String_Acc); + pragma Import (C, Free); + + function Malloc (Len : Natural) return Fat_String_Acc; + pragma Import (C, Malloc); + + function Realloc (Ptr : Fat_String_Acc; Len : Natural) + return Fat_String_Acc; + pragma Import (C, Realloc); + + + procedure Free (Vstr : in out Vstring) is + begin + Free (Vstr.Str); + Vstr := (Str => null, + Max => 0, + Len => 0); + end Free; + + procedure Grow (Vstr : in out Vstring; Sum : Natural) + is + Nlen : constant Natural := Vstr.Len + Sum; + Nmax : Natural; + begin + Vstr.Len := Nlen; + if Nlen <= Vstr.Max then + return; + end if; + if Vstr.Max = 0 then + Nmax := 32; + else + Nmax := Vstr.Max; + end if; + while Nmax < Nlen loop + Nmax := Nmax * 2; + end loop; + Vstr.Str := Realloc (Vstr.Str, Nmax); + if Vstr.Str = null then + Internal_Error ("grt.vstrings.grow: memory exhausted"); + end if; + Vstr.Max := Nmax; + end Grow; + + procedure Append (Vstr : in out Vstring; C : Character) + is + begin + Grow (Vstr, 1); + Vstr.Str (Vstr.Len) := C; + end Append; + + procedure Append (Vstr : in out Vstring; Str : String) + is + S : constant Natural := Vstr.Len; + begin + Grow (Vstr, Str'Length); + Vstr.Str (S + 1 .. S + Str'Length) := Str; + end Append; + + procedure Append (Vstr : in out Vstring; Str : Ghdl_C_String) + is + S : constant Natural := Vstr.Len; + L : constant Natural := strlen (Str); + begin + Grow (Vstr, L); + Vstr.Str (S + 1 .. S + L) := Str (1 .. L); + end Append; + + function Length (Vstr : Vstring) return Natural is + begin + return Vstr.Len; + end Length; + + procedure Truncate (Vstr : in out Vstring; Len : Natural) is + begin + if Len > Vstr.Len then + Internal_Error ("grt.vstrings.truncate: bad len"); + end if; + Vstr.Len := Len; + end Truncate; + + procedure Put (Stream : FILEs; Vstr : Vstring) + is + S : size_t; + begin + S := size_t (Vstr.Len); + if S > 0 then + S := fwrite (Vstr.Str (1)'Address, S, 1, Stream); + end if; + end Put; + + procedure Free (Rstr : in out Rstring) is + begin + Free (Rstr.Str); + Rstr := (Str => null, + Max => 0, + First => 0); + end Free; + + function Length (Rstr : Rstring) return Natural is + begin + return Rstr.Max + 1 - Rstr.First; + end Length; + + procedure Grow (Rstr : in out Rstring; Min : Natural) + is + Len : constant Natural := Length (Rstr); + Nlen : constant Natural := Len + Min; + Nstr : Fat_String_Acc; + Nfirst : Natural; + Nmax : Natural; + begin + if Nlen <= Rstr.Max then + return; + end if; + if Rstr.Max = 0 then + Nmax := 32; + else + Nmax := Rstr.Max; + end if; + while Nmax < Nlen loop + Nmax := Nmax * 2; + end loop; + Nstr := Malloc (Nmax); + Nfirst := Nmax + 1 - Len; + if Rstr.Str /= null then + Nstr (Nfirst .. Nmax) := Rstr.Str (Rstr.First .. Rstr.Max); + Free (Rstr.Str); + end if; + Rstr := (Str => Nstr, + Max => Nmax, + First => Nfirst); + end Grow; + + procedure Prepend (Rstr : in out Rstring; C : Character) + is + begin + Grow (Rstr, 1); + Rstr.First := Rstr.First - 1; + Rstr.Str (Rstr.First) := C; + end Prepend; + + procedure Prepend (Rstr : in out Rstring; Str : String) + is + begin + Grow (Rstr, Str'Length); + Rstr.First := Rstr.First - Str'Length; + Rstr.Str (Rstr.First .. Rstr.First + Str'Length - 1) := Str; + end Prepend; + + procedure Prepend (Rstr : in out Rstring; Str : Ghdl_C_String) + is + L : constant Natural := strlen (Str); + begin + Grow (Rstr, L); + Rstr.First := Rstr.First - L; + Rstr.Str (Rstr.First .. Rstr.First + L - 1) := Str (1 .. L); + end Prepend; + + function Get_Address (Rstr : Rstring) return Address + is + begin + return Rstr.Str (Rstr.First)'Address; + end Get_Address; + + procedure Copy (Rstr : Rstring; Str : in out String; Len : out Natural) + is + begin + Len := Length (Rstr); + if Len > Str'Length then + Str := Rstr.Str (Rstr.First .. Rstr.First + Str'Length - 1); + else + Str (Str'First .. Str'First + Len - 1) := + Rstr.Str (Rstr.First .. Rstr.First + Len - 1); + end if; + end Copy; + + procedure Put (Stream : FILEs; Rstr : Rstring) + is + S : size_t; + pragma Unreferenced (S); + begin + S := fwrite (Get_Address (Rstr), size_t (Length (Rstr)), 1, Stream); + end Put; + + generic + type Ntype is range <>; + --Max_Len : Natural; + procedure Gen_To_String (Str : out String; First : out Natural; N : Ntype); + + procedure Gen_To_String (Str : out String; First : out Natural; N : Ntype) + is + subtype R_Type is String (1 .. Str'Length); + S : R_Type renames Str; + P : Natural := S'Last; + V : Ntype; + begin + if N > 0 then + V := -N; + else + V := N; + end if; + loop + S (P) := Character'Val (48 - (V rem 10)); + V := V / 10; + exit when V = 0; + P := P - 1; + end loop; + if N < 0 then + P := P - 1; + S (P) := '-'; + end if; + First := P; + end Gen_To_String; + + procedure To_String_I32 is new Gen_To_String (Ntype => Ghdl_I32); + + procedure To_String (Str : out String; First : out Natural; N : Ghdl_I32) + renames To_String_I32; + + procedure To_String_I64 is new Gen_To_String (Ntype => Ghdl_I64); + + procedure To_String (Str : out String; First : out Natural; N : Ghdl_I64) + renames To_String_I64; + + procedure To_String (Str : out String; Last : out Natural; N : Ghdl_F64) + is + function Trunc (V : Ghdl_F64) return Ghdl_F64; + pragma Import (C, Trunc); + + P : Natural := Str'First; + V : Ghdl_F64; + Vmax : Ghdl_F64; + Vd : Ghdl_F64; + Exp : Integer; + D : Integer; + B : Boolean; + begin + -- Handle sign. + if N < 0.0 then + Str (P) := '-'; + P := P + 1; + V := -N; + else + V := N; + end if; + + -- Compute the mantissa. + -- and normalize V in [0 .. 10.0[ + -- FIXME: should do a dichotomy. + if V = 0.0 then + Exp := 0; + elsif V < 1.0 then + Exp := 0; + loop + exit when V >= 1.0; + Exp := Exp - 1; + V := V * 10.0; + end loop; + else + Exp := 0; + loop + exit when V < 10.0; + Exp := Exp + 1; + V := V / 10.0; + end loop; + end if; + + Vmax := 10.0 ** (1 - 15); + for I in 0 .. 15 loop + -- Vd := Ghdl_F64'Truncation (V); + Vd := Trunc (V); + Str (P) := Character'Val (48 + Integer (Vd)); + P := P + 1; + V := (V - Vd) * 10.0; + + if I = 0 then + Str (P) := '.'; + P := P + 1; + end if; + exit when I > 0 and V < Vmax; + Vmax := Vmax * 10.0; + end loop; + + if Exp /= 0 then + -- LRM93 14.3 + -- if the exponent is present, the `e' is written as a lower case + -- character. + Str (P) := 'e'; + P := P + 1; + + if Exp < 0 then + Str (P) := '-'; + P := P + 1; + Exp := -Exp; + end if; + B := False; + for I in 0 .. 4 loop + D := (Exp / 10000) mod 10; + if D /= 0 or B or I = 4 then + Str (P) := Character'Val (48 + D); + P := P + 1; + B := True; + end if; + Exp := (Exp - D * 10000) * 10; + end loop; + end if; + + Last := P - 1; + end To_String; + + procedure To_String (Str : out String_Real_Digits; + Last : out Natural; + N : Ghdl_F64; + Nbr_Digits : Ghdl_I32) + is + procedure Snprintf_Nf (Str : in out String; + Len : Natural; + Ndigits : Ghdl_I32; + V : Ghdl_F64); + pragma Import (C, Snprintf_Nf, "__ghdl_snprintf_nf"); + begin + Snprintf_Nf (Str, Str'Length, Nbr_Digits, N); + Last := strlen (To_Ghdl_C_String (Str'Address)); + end To_String; + + procedure To_String (Str : out String_Real_Digits; + Last : out Natural; + N : Ghdl_F64; + Format : Ghdl_C_String) + is + procedure Snprintf_Fmtf (Str : in out String; + Len : Natural; + Format : Ghdl_C_String; + V : Ghdl_F64); + pragma Import (C, Snprintf_Fmtf, "__ghdl_snprintf_fmtf"); + begin + -- FIXME: check format ('%', f/g/e/a) + Snprintf_Fmtf (Str, Str'Length, Format, N); + Last := strlen (To_Ghdl_C_String (Str'Address)); + end To_String; + + procedure To_String (Str : out String_Time_Unit; + First : out Natural; + Value : Ghdl_I64; + Unit : Ghdl_I64) + is + V, U : Ghdl_I64; + D : Natural; + P : Natural := Str'Last; + Has_Digits : Boolean; + begin + -- Always work on negative values. + if Value > 0 then + V := -Value; + else + V := Value; + end if; + + Has_Digits := False; + U := Unit; + loop + if U = 1 then + if Has_Digits then + Str (P) := '.'; + P := P - 1; + else + Has_Digits := True; + end if; + end if; + + D := Natural (-(V rem 10)); + if D /= 0 or else Has_Digits then + Str (P) := Character'Val (48 + D); + P := P - 1; + Has_Digits := True; + end if; + U := U / 10; + V := V / 10; + exit when V = 0 and then U = 0; + end loop; + if not Has_Digits then + Str (P) := '0'; + else + P := P + 1; + end if; + if Value < 0 then + P := P - 1; + Str (P) := '-'; + end if; + First := P; + end To_String; +end Grt.Vstrings; |