/usr/share/ada/adainclude/gnatvsn/krunch.adb is in libgnatvsn4.8-dev 4.8.2-8ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 | ------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- K R U N C H --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2009, 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 3, 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Hostparm;
procedure Krunch
(Buffer : in out String;
Len : in out Natural;
Maxlen : Natural;
No_Predef : Boolean;
VMS_On_Target : Boolean := False)
is
pragma Assert (Buffer'First = 1);
-- This is a documented requirement; the assert turns off index warnings
B1 : Character renames Buffer (1);
Curlen : Natural;
Krlen : Natural;
Num_Seps : Natural;
Startloc : Natural;
J : Natural;
begin
-- Deal with special predefined children cases. Startloc is the first
-- location for the krunch, set to 1, except for the predefined children
-- case, where it is set to 3, to start after the standard prefix.
if No_Predef then
Startloc := 1;
Curlen := Len;
Krlen := Maxlen;
elsif Len >= 18
and then Buffer (1 .. 17) = "ada-wide_text_io-"
then
Startloc := 3;
Buffer (2 .. 5) := "-wt-";
Buffer (6 .. Len - 12) := Buffer (18 .. Len);
Curlen := Len - 12;
Krlen := 8;
elsif Len >= 23
and then Buffer (1 .. 22) = "ada-wide_wide_text_io-"
then
Startloc := 3;
Buffer (2 .. 5) := "-zt-";
Buffer (6 .. Len - 17) := Buffer (23 .. Len);
Curlen := Len - 17;
Krlen := 8;
elsif Len >= 4 and then Buffer (1 .. 4) = "ada-" then
Startloc := 3;
Buffer (2 .. Len - 2) := Buffer (4 .. Len);
Curlen := Len - 2;
Krlen := 8;
elsif Len >= 5 and then Buffer (1 .. 5) = "gnat-" then
Startloc := 3;
Buffer (2 .. Len - 3) := Buffer (5 .. Len);
Curlen := Len - 3;
Krlen := 8;
elsif Len >= 7 and then Buffer (1 .. 7) = "system-" then
Startloc := 3;
Buffer (2 .. Len - 5) := Buffer (7 .. Len);
Curlen := Len - 5;
Krlen := 8;
elsif Len >= 11 and then Buffer (1 .. 11) = "interfaces-" then
Startloc := 3;
Buffer (2 .. Len - 9) := Buffer (11 .. Len);
Curlen := Len - 9;
Krlen := 8;
-- For the renamings in the obsolescent section, we also force krunching
-- to 8 characters, but no other special processing is required here.
-- Note that text_io and calendar are already short enough anyway.
elsif (Len = 9 and then Buffer (1 .. 9) = "direct_io")
or else (Len = 10 and then Buffer (1 .. 10) = "interfaces")
or else (Len = 13 and then Buffer (1 .. 13) = "io_exceptions")
or else (Len = 12 and then Buffer (1 .. 12) = "machine_code")
or else (Len = 13 and then Buffer (1 .. 13) = "sequential_io")
or else (Len = 20 and then Buffer (1 .. 20) = "unchecked_conversion")
or else (Len = 22 and then Buffer (1 .. 22) = "unchecked_deallocation")
then
Startloc := 1;
Krlen := 8;
Curlen := Len;
-- Special case of a child unit whose parent unit is a single letter that
-- is A, G, I, or S. In order to prevent confusion with krunched names
-- of predefined units use a tilde rather than a minus as the second
-- character of the file name. On VMS a tilde is an illegal character
-- in a file name, two consecutive underlines ("__") are used instead.
elsif Len > 1
and then Buffer (2) = '-'
and then (B1 = 'a' or else B1 = 'g' or else B1 = 'i' or else B1 = 's')
and then Len <= Maxlen
then
-- When VMS is the host, it is always also the target
if Hostparm.OpenVMS or else VMS_On_Target then
Len := Len + 1;
Buffer (4 .. Len) := Buffer (3 .. Len - 1);
Buffer (2) := '_';
Buffer (3) := '_';
else
Buffer (2) := '~';
end if;
if Len <= Maxlen then
return;
else
-- Case of VMS when the buffer had exactly the length Maxlen and now
-- has the length Maxlen + 1: krunching after "__" is needed.
Startloc := 4;
Curlen := Len;
Krlen := Maxlen;
end if;
-- Normal case, not a predefined file
else
Startloc := 1;
Curlen := Len;
Krlen := Maxlen;
end if;
-- Immediate return if file name is short enough now
if Curlen <= Krlen then
Len := Curlen;
return;
end if;
-- If string contains Wide_Wide, replace by a single z
J := Startloc;
while J <= Curlen - 8 loop
if Buffer (J .. J + 8) = "wide_wide"
and then (J = Startloc
or else Buffer (J - 1) = '-'
or else Buffer (J - 1) = '_')
and then (J + 8 = Curlen
or else Buffer (J + 9) = '-'
or else Buffer (J + 9) = '_')
then
Buffer (J) := 'z';
Buffer (J + 1 .. Curlen - 8) := Buffer (J + 9 .. Curlen);
Curlen := Curlen - 8;
end if;
J := J + 1;
end loop;
-- For now, refuse to krunch a name that contains an ESC character (wide
-- character sequence) since it's too much trouble to do this right ???
for J in 1 .. Curlen loop
if Buffer (J) = ASCII.ESC then
return;
end if;
end loop;
-- Count number of separators (minus signs and underscores) and for now
-- replace them by spaces. We keep them around till the end to control
-- the krunching process, and then we eliminate them as the last step
Num_Seps := 0;
for J in Startloc .. Curlen loop
if Buffer (J) = '-' or else Buffer (J) = '_' then
Buffer (J) := ' ';
Num_Seps := Num_Seps + 1;
end if;
end loop;
-- Now we do the one character at a time krunch till we are short enough
while Curlen - Num_Seps > Krlen loop
declare
Long_Length : Natural := 0;
Long_Last : Natural := 0;
Piece_Start : Natural;
Ptr : Natural;
begin
Ptr := Startloc;
-- Loop through pieces to find longest piece
while Ptr <= Curlen loop
Piece_Start := Ptr;
-- Loop through characters in one piece of name
while Ptr <= Curlen and then Buffer (Ptr) /= ' ' loop
Ptr := Ptr + 1;
end loop;
if Ptr - Piece_Start > Long_Length then
Long_Length := Ptr - Piece_Start;
Long_Last := Ptr - 1;
end if;
Ptr := Ptr + 1;
end loop;
-- Remove last character of longest piece
if Long_Last < Curlen then
Buffer (Long_Last .. Curlen - 1) :=
Buffer (Long_Last + 1 .. Curlen);
end if;
Curlen := Curlen - 1;
end;
end loop;
-- Final step, remove the spaces
Len := 0;
for J in 1 .. Curlen loop
if Buffer (J) /= ' ' then
Len := Len + 1;
Buffer (Len) := Buffer (J);
end if;
end loop;
return;
end Krunch;
|