summaryrefslogtreecommitdiffstats
path: root/bin/make_overflow
blob: d1d16ee84c00ea230d4c7d10ced7c2af7481a7ed (plain)
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
#!/usr/bin/env perl
require 5.003;
use strict;
use warnings;

# Global settings

# List of supported C types to generate overflow assignment code for
my @ctypes = ( () );

#
# Copyright by The HDF Group.
# Copyright by the Board of Trustees of the University of Illinois.
# All rights reserved.
#
# This file is part of HDF5.  The full HDF5 copyright notice, including
# terms governing use, modification, and redistribution, is contained in
# the COPYING file, which can be found at the root of the source code
# distribution tree, or in https://www.hdfgroup.org/licenses.
# If you do not have access to either file, you may request a copy from
# help@hdfgroup.org.
#

# Create assignment overflow #ifdefs
#
# Programmer: Quincey Koziol
# Creation Date: 2009/04/09

##############################################################################
# Parse a meaningful line (not a comment or blank line) into the appropriate
# data structure
#
sub parse_line ($) {
    my $line = shift;   # Get the line to parse

    # Parse get the type name and whether it's signed or unsigned
#print "line=$line\n";
    if($line =~ /.*SIGNED\s*;\s*$/ || $line =~ /.*UNSIGNED\s*;\s*$/) {
        my $name;           # The name of the type
        my $signed;         # Whether the type is signed or not

        # Get the type's name & signed status
        ($name, $signed) = ($line =~ /^\s*(\w*)\s*,\s*(\w*)\s*;\s*$/);
#print "name = '$name', signed = '$signed'\n";

        # Append the type to the list of C types already parsed
        push @ctypes, [$name, $signed];

    }
    # Unknown keyword
    else {
        die "unknown keyword: $line";
    }
}

##############################################################################
# Print the copyright into an open file
#
sub print_copyright ($) {
    my $fh = shift;

    print $fh "/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\n";
    print $fh " * Copyright by The HDF Group.                                               *\n";
    print $fh " * Copyright by the Board of Trustees of the University of Illinois.         *\n";
    print $fh " * All rights reserved.                                                      *\n";
    print $fh " *                                                                           *\n";
    print $fh " * This file is part of HDF5.  The full HDF5 copyright notice, including     *\n";
    print $fh " * terms governing use, modification, and redistribution, is contained in    *\n";
    print $fh " * the COPYING file, which can be found at the root of the source code       *\n";
    print $fh " * distribution tree, or in https://www.hdfgroup.org/licenses.               *\n";
    print $fh " * If you do not have access to either file, you may request a copy from     *\n";
    print $fh " * help\@hdfgroup.org.                                                        *\n";
    print $fh " * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */\n";
}

##############################################################################
# Print the "do not change this file" warning
#
sub print_warning ($) {
    my $fh = shift;

    print $fh "\n/* Generated automatically by bin/make_overflow -- do not edit */\n";
    print $fh "/* Add new types to H5overflow.txt file */\n\n";
}

##############################################################################
# Print start of ifdef's to prevent a file from being re-included
#
sub print_startprotect ($$) {
    my ($fh, $file) = @_;

    # Clip off the ".h" part of the name
    $file =~ s/(\w*)\.h/$1/;

    # Print the ifdef info
    print $fh "\n#ifndef _${file}_H\n";
    print $fh "#define _${file}_H\n";
}

##############################################################################
# Print assignment overflow macros for each type
#
sub print_typemacros ($) {
    my $fh = shift;             # File handle for output file
    my ($src_aref, $dst_aref);  # References for each type's information

    # Print the descriptive comment
    print $fh "\n\n/* Each type in this file is tested for assignment to the other types,\n";
    print $fh " *      and range checks are defined for bad assignments at run-time.\n";
    print $fh " */\n";

    for $src_aref (@ctypes) {
        # Print a descriptive comment
        print $fh "\n/* Assignment checks for @$src_aref[0] */\n\n";

        for $dst_aref (@ctypes) {
            if (@$src_aref[0] ne @$dst_aref[0]) {
                # Print a descriptive comment
                print $fh "/* src: @$src_aref[0], dst: @$dst_aref[0] */\n";

                # Print actual type size checks & macro definitions
                print $fh "#if H5_SIZEOF_", uc @$src_aref[0], " < H5_SIZEOF_", uc @$dst_aref[0], "\n";
                print $fh "    #define ASSIGN_", @$src_aref[0], "_TO_", @$dst_aref[0], "(dst, dsttype, src, srctype) \\\n";
                if ( @$src_aref[1] eq @$dst_aref[1]) {
                    print $fh "        ASSIGN_TO_LARGER_SIZE_SAME_SIGNED(dst, dsttype, src, srctype)\n";
                } elsif ( @$src_aref[1] eq "SIGNED") {
                    print $fh "        ASSIGN_TO_LARGER_SIZE_SIGNED_TO_UNSIGNED(dst, dsttype, src, srctype)\n";
                } else {
                    print $fh "        ASSIGN_TO_LARGER_SIZE_UNSIGNED_TO_SIGNED(dst, dsttype, src, srctype)\n";
                }
                print $fh "#elif H5_SIZEOF_", uc @$src_aref[0], " > H5_SIZEOF_", uc @$dst_aref[0], "\n";
                print $fh "    #define ASSIGN_", @$src_aref[0], "_TO_", @$dst_aref[0], "(dst, dsttype, src, srctype) \\\n";
                print $fh "        ASSIGN_TO_SMALLER_SIZE(dst, dsttype, src, srctype)\n";
                print $fh "#else /* H5_SIZEOF_", uc @$src_aref[0], " == H5_SIZEOF_", uc @$dst_aref[0], " */\n";
                print $fh "    #define ASSIGN_", @$src_aref[0], "_TO_", @$dst_aref[0], "(dst, dsttype, src, srctype) \\\n";
                if ( @$src_aref[1] eq @$dst_aref[1]) {
                    print $fh "        ASSIGN_TO_SAME_SIZE_SAME_SIGNED(dst, dsttype, src, srctype)\n";
                } elsif ( @$src_aref[1] eq "SIGNED") {
                    print $fh "        ASSIGN_TO_SAME_SIZE_SIGNED_TO_UNSIGNED(dst, dsttype, src, srctype)\n";
                } else {
                    print $fh "        ASSIGN_TO_SAME_SIZE_UNSIGNED_TO_SIGNED(dst, dsttype, src, srctype)\n";
                }
                print $fh "#endif /* src: @$src_aref[0] dst: @$dst_aref[0] */\n\n";
            }
        }
    }

}

##############################################################################
# Print end of ifdef's to prevent a file from being re-included
#
sub print_endprotect ($$) {
    my ($fh, $file) = @_;

    # Clip off the ".h" part of the name
    $file =~ s/(\w*)\.h/$1/;

    # Print the endif info
    print $fh "#endif /* ${file}_H */\n\n";
}

##############################################################################
# Create the generated portion of the public header file
#
sub create_public ($) {
    my $prefix = shift;         # Get the prefix for the generated file
    my $file = "H5overflow.h";   # Name of file to generate
    my $name;                   # Name of function

    # Rename previous file
#    rename "${prefix}${file}", "${prefix}${file}~" or die "unable to make backup";

    # Open new header file
    open HEADER, ">${prefix}${file}" or die "unable to modify source";

    # Create file contents
    print_copyright(*HEADER);
    print_warning(*HEADER);
    print_startprotect(*HEADER, $file);
    print_typemacros(*HEADER);
    print_endprotect(*HEADER, $file);

    # Close header file
    close HEADER;
}

##############################################################################
# Read symbol version file (given as command-line argument) in and process it
# into internal data structures, then create header files.
#
my $file;       # Filename of input file

for $file (@ARGV) {
    my $prefix;         # Local prefix for generated files
    my $line;           # Line from input file

#print "file = '$file'\n";
    ($prefix) = ($file =~ /(^.*\/)/);
#print "prefix = '$prefix'\n";
    # Read in the entire file
    open SOURCE, $file or die "$file: $!\n";
    while ( defined ($line=<SOURCE>) ) {
        # Skip blank lines and those lines whose first character is a '#'
        if(!($line =~ /(^\s*#.*$)|(^\s*$)/)) {
            # Construct data structures for later printing
            parse_line($line);
        }
    }
    close SOURCE;
  
    # Create header files
    print "Generating 'H5overflow.h'\n";
    create_public($prefix);
}