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Diffstat (limited to 'translate/grt/grt-vstrings.adb')
| -rw-r--r-- | translate/grt/grt-vstrings.adb | 243 |
1 files changed, 243 insertions, 0 deletions
diff --git a/translate/grt/grt-vstrings.adb b/translate/grt/grt-vstrings.adb new file mode 100644 index 000000000..17c64e3da --- /dev/null +++ b/translate/grt/grt-vstrings.adb @@ -0,0 +1,243 @@ +-- GHDL Run Time (GRT) - variable strings. +-- Copyright (C) 2002, 2003, 2004, 2005 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. +with Grt.Errors; use Grt.Errors; + +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 : 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 : 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 : Natural := Vstr.Len; + L : 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 : Natural := Length (Rstr); + Nlen : 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 : 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; + 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; +end Grt.Vstrings; |