1 ------------------------------------------------------------------------------
3 -- GNAT COMPILER COMPONENTS --
9 -- Copyright (C) 1992-2005 Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
36 (Buffer : in out String;
42 B1 : Character renames Buffer (1);
50 -- Deal with special predefined children cases. Startloc is the first
51 -- location for the krunch, set to 1, except for the predefined children
52 -- case, where it is set to 3, to start after the standard prefix.
60 and then Buffer (1 .. 17) = "ada-wide_text_io-"
63 Buffer (2 .. 5) := "-wt-";
64 Buffer (6 .. Len - 12) := Buffer (18 .. Len);
69 and then Buffer (1 .. 22) = "ada-wide_wide_text_io-"
72 Buffer (2 .. 5) := "-zt-";
73 Buffer (6 .. Len - 17) := Buffer (23 .. Len);
77 elsif Len >= 4 and then Buffer (1 .. 4) = "ada-" then
79 Buffer (2 .. Len - 2) := Buffer (4 .. Len);
83 elsif Len >= 5 and then Buffer (1 .. 5) = "gnat-" then
85 Buffer (2 .. Len - 3) := Buffer (5 .. Len);
89 elsif Len >= 7 and then Buffer (1 .. 7) = "system-" then
91 Buffer (2 .. Len - 5) := Buffer (7 .. Len);
95 elsif Len >= 11 and then Buffer (1 .. 11) = "interfaces-" then
97 Buffer (2 .. Len - 9) := Buffer (11 .. Len);
101 -- For the renamings in the obsolescent section, we also force krunching
102 -- to 8 characters, but no other special processing is required here.
103 -- Note that text_io and calendar are already short enough anyway.
105 elsif (Len = 9 and then Buffer (1 .. 9) = "direct_io")
106 or else (Len = 10 and then Buffer (1 .. 10) = "interfaces")
107 or else (Len = 13 and then Buffer (1 .. 13) = "io_exceptions")
108 or else (Len = 12 and then Buffer (1 .. 12) = "machine_code")
109 or else (Len = 13 and then Buffer (1 .. 13) = "sequential_io")
110 or else (Len = 20 and then Buffer (1 .. 20) = "unchecked_conversion")
111 or else (Len = 22 and then Buffer (1 .. 22) = "unchecked_deallocation")
117 -- Special case of a child unit whose parent unit is a single letter that
118 -- is A, G, I, or S. In order to prevent confusion with krunched names
119 -- of predefined units use a tilde rather than a minus as the second
120 -- character of the file name. On VMS a tilde is an illegal character
121 -- in a file name, so a dollar_sign is used instead.
124 and then Buffer (2) = '-'
125 and then (B1 = 'a' or else B1 = 'g' or else B1 = 'i' or else B1 = 's')
126 and then Len <= Maxlen
128 if Hostparm.OpenVMS then
136 -- Normal case, not a predefined file
144 -- Immediate return if file name is short enough now
146 if Curlen <= Krlen then
151 -- If string contains Wide_Wide, replace by a single z
154 while J <= Curlen - 8 loop
155 if Buffer (J .. J + 8) = "wide_wide"
156 and then (J = Startloc
157 or else Buffer (J - 1) = '-'
158 or else Buffer (J - 1) = '_')
159 and then (J + 8 = Curlen
160 or else Buffer (J + 9) = '-'
161 or else Buffer (J + 9) = '_')
164 Buffer (J + 1 .. Curlen - 8) := Buffer (J + 9 .. Curlen);
165 Curlen := Curlen - 8;
171 -- For now, refuse to krunch a name that contains an ESC character (wide
172 -- character sequence) since it's too much trouble to do this right ???
174 for J in 1 .. Curlen loop
175 if Buffer (J) = ASCII.ESC then
180 -- Count number of separators (minus signs and underscores) and for now
181 -- replace them by spaces. We keep them around till the end to control
182 -- the krunching process, and then we eliminate them as the last step
185 for J in Startloc .. Curlen loop
186 if Buffer (J) = '-' or else Buffer (J) = '_' then
188 Num_Seps := Num_Seps + 1;
192 -- Now we do the one character at a time krunch till we are short enough
194 while Curlen - Num_Seps > Krlen loop
196 Long_Length : Natural := 0;
197 Long_Last : Natural := 0;
198 Piece_Start : Natural;
204 -- Loop through pieces to find longest piece
206 while Ptr <= Curlen loop
209 -- Loop through characters in one piece of name
211 while Ptr <= Curlen and then Buffer (Ptr) /= ' ' loop
215 if Ptr - Piece_Start > Long_Length then
216 Long_Length := Ptr - Piece_Start;
217 Long_Last := Ptr - 1;
223 -- Remove last character of longest piece
225 if Long_Last < Curlen then
226 Buffer (Long_Last .. Curlen - 1) :=
227 Buffer (Long_Last + 1 .. Curlen);
230 Curlen := Curlen - 1;
234 -- Final step, remove the spaces
238 for J in 1 .. Curlen loop
239 if Buffer (J) /= ' ' then
241 Buffer (Len) := Buffer (J);