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
|
########################################################################
#
# literal 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 of the License, or
# (at your option) any later version.
#
# This program 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 this program; see the file COPYING. If not, write to
# the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
#
########################################################################
#
# Project : File Preprocessor - literal module
# Filename : $RCSfile: literal.pm,v $
# Author : $Author: darren $
# Maintainer : Darren Miller: darren@cabaret.demon.co.uk
# File version : $Revision: 1.5 $
# Last changed : $Date: 2003/07/02 22:23:16 $
# Description : This module allows literal strings ("string") to
# pass through filepp WITHOUT any macros in the string
# being replaced
# Licence : GNU copyleft
#
########################################################################
# THIS IS A FILEPP MODULE, YOU NEED FILEPP TO USE IT!!!
# usage: filepp -m literal.pm <files>
########################################################################
package Literal;
use strict;
# version number of module
my $VERSION = '1.1.1';
# flag to say if in string or not
my $in_string1 = 0;
# if LITERAL_REVERSE is defined, only replace macros that are in strings.
if(Filepp::Ifdef("LITERAL_REVERSE")) { $in_string1 = 1; }
# char to start and end literal strings with
my $literal = '"';
my @Strings;
my @Literal;
my @Macros;
# tokens used for tempoarily replacing literals
my @Tokens = ('0','1','2','3','4','5','6','7','8','9',
'a','b','c','d','e','f','g','h','i','j',
'k','l','m','n','o','p','q','r','s','t',
'u','v','w','x','y','z','A','B','C','D',
'E','F','G','H','I','J','K','L','M','N',
'O','P','Q','R','S','T','U','V','W','X',
'Y','Z','_');
# get next token - converts integer into token, error if int out of range
sub GetToken
{
my $i = shift;
my $tokens = $#Tokens+1;
my $count = $tokens*$tokens;
if($i >= ($count*$tokens)) {
Filepp::Error("literal: internal error, cannot find unused token");
}
my $token = $Tokens[int($i/$count)];
if($i >= $count) { $i -= $count*(int($i/$count)); }
$count /= $tokens;
$token = $token.$Tokens[int($i/$count)];
if($i >= $count) { $i -= $count*(int($i/$count)); }
$token = $token.$Tokens[$i];
return $token;
}
# replace all macros that do NOT appear in literal strings
sub ReplaceDefines
{
my $in_string = $in_string1;
my $string = shift;
if($string =~ /$literal/) {
# split up line into bits in quotes and bits not in quotes
@Strings = @Literal = @Macros = ();
while($string =~ /$literal/) {
push(@Strings, $`);
$string = $'; # for the sanity of emacs'
push(@Literal, $in_string);
if($in_string) { $in_string = 0; }
else { $in_string = 1; }
}
# last part of line
push(@Strings, $string);
push(@Literal, $in_string);
$string = "";
my $i;
my $j = 0;
for($i=0; $i<=$#Strings; $i++) {
# replace all literals with a token
if($Literal[$i]) {
my $token = GetToken($j++);
my $macro = "\e\"".$token."\"\e";
# check token not already in use
while($macro ne Filepp::ReplaceDefines($macro)) {
Filepp::Debug("literal: warning token ".$token.
" cannot be used");
$token = GetToken($j++);
$macro = "\e\"".$token."\"\e";
}
Filepp::Debug("literal: using token ".$token." for ".
$Strings[$i]);
$string = $string.$macro;
push(@Macros, $macro);
}
else {
$string = $string.$Strings[$i];
}
}
# replace macros
@Macros = reverse(@Macros);
$string = Filepp::ReplaceDefines($string);
# replace tokens with literals
for($i=0; $i<=$#Strings; $i++) {
if($Literal[$i]) {
my $macro = pop(@Macros);
my $replace = $Strings[$i];
if($i > 0) { $replace = "\"".$replace; }
if($i < $#Strings) { $replace = $replace."\""; }
$string =~ s/$macro/$replace/g;
}
}
}
else {
# no literals in string
$string = Filepp::ReplaceDefines($string);
}
return $string;
}
# remove filepp's ReplaceDefines routine and replace it with Literals.
Filepp::RemoveProcessor("Filepp::ReplaceDefines");
Filepp::AddProcessor("Literal::ReplaceDefines");
return 1;
########################################################################
# End of file
########################################################################
|
