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#!/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.
# 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
#
##############################################################################
# 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 " * 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);
}
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