diff options
Diffstat (limited to 'gcc/ada/output.ads')
| -rw-r--r-- | gcc/ada/output.ads | 53 |
1 files changed, 50 insertions, 3 deletions
diff --git a/gcc/ada/output.ads b/gcc/ada/output.ads index d69bcb3dcfb..10df6557844 100644 --- a/gcc/ada/output.ads +++ b/gcc/ada/output.ads @@ -6,7 +6,7 @@ -- -- -- S p e c -- -- -- --- Copyright (C) 1992-2005 Free Software Foundation, Inc. -- +-- 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- -- @@ -35,7 +35,8 @@ -- for writing error messages and informational output. It is also used -- by the debug source file output routines (see Sprintf.Print_Eol). -with Types; use Types; +with Hostparm; use Hostparm; +with Types; use Types; package Output is pragma Elaborate_Body; @@ -86,6 +87,9 @@ package Output is -- Write one character to the standard output file. Note that the -- character should not be LF or CR (use Write_Eol for end of line) + procedure Write_Erase_Char (C : Character); + -- If last character in buffer matches C, erase it, otherwise no effect + procedure Write_Eol; -- Write an end of line (whatever is required by the system in use, -- e.g. CR/LF for DOS, or LF for Unix) to the standard output file. @@ -106,11 +110,30 @@ package Output is procedure Write_Line (S : String); -- Equivalent to Write_Str (S) followed by Write_Eol; - function Column return Nat; + function Column return Pos; pragma Inline (Column); -- Returns the number of the column about to be written (e.g. a value -- of 1 means the current line is empty). + ------------------------- + -- Buffer Save/Restore -- + ------------------------- + + -- This facility allows the current line buffer to be saved and restored + + type Saved_Output_Buffer is private; + -- Type used for Save/Restore_Buffer + + Buffer_Max : constant := Hostparm.Max_Line_Length; + -- Maximal size of a buffered output line + + function Save_Output_Buffer return Saved_Output_Buffer; + -- Save current line buffer and reset line buffer to empty + + procedure Restore_Output_Buffer (S : Saved_Output_Buffer); + -- Restore previously saved output buffer. The value in S is not affected + -- so it is legtimate to restore a buffer more than once. + -------------------------- -- Debugging Procedures -- -------------------------- @@ -144,4 +167,28 @@ package Output is procedure w (L : String; B : Boolean); -- Dump contents of string followed by blank, Boolean, line return +private + -- Note: the following buffer and column position are maintained by the + -- subprograms defined in this package, and cannot be directly modified or + -- accessed by a client. + + Buffer : String (1 .. Buffer_Max + 1); + for Buffer'Alignment use 4; + -- Buffer used to build output line. We do line buffering because it + -- is needed for the support of the debug-generated-code option (-gnatD). + -- Historically it was first added because on VMS, line buffering is + -- needed with certain file formats. So in any case line buffering must + -- be retained for this purpose, even if other reasons disappear. Note + -- any attempt to write more output to a line than can fit in the buffer + -- will be silently ignored. The alignment clause improves the efficiency + -- of the save/restore procedures. + + Next_Col : Positive range 1 .. Buffer'Length + 1 := 1; + -- Column about to be written + + type Saved_Output_Buffer is record + Buffer : String (1 .. Buffer_Max + 1); + Next_Col : Positive; + end record; + end Output; |