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#!/usr/bin/perl eval 'exec /usr/bin/perl -S $0 ${1+"$@"}' if $running_under_some_shell; use strict; use Config; use File::Path qw(mkpath); use Getopt::Std; # Make sure read permissions for all are set: if (defined umask && (umask() & 0444)) { umask (umask() & ~0444); } getopts('Dd:rlhaQe'); use vars qw($opt_D $opt_d $opt_r $opt_l $opt_h $opt_a $opt_Q $opt_e); die "-r and -a options are mutually exclusive\n" if ($opt_r and $opt_a); my @inc_dirs = inc_dirs() if $opt_a; my $Exit = 0; my $Dest_dir = $opt_d || $Config{installsitearch}; die "Destination directory $Dest_dir doesn't exist or isn't a directory\n" unless -d $Dest_dir; my @isatype = qw( char uchar u_char short ushort u_short int uint u_int long ulong u_long FILE key_t caddr_t float double size_t ); my %isatype; @isatype{@isatype} = (1) x @isatype; my $inif = 0; my %Is_converted; my %bad_file = (); @ARGV = ('-') unless @ARGV; build_preamble_if_necessary(); sub reindent($) { my($text) = shift; $text =~ s/\n/\n /g; $text =~ s/ /\t/g; $text; } my ($t, $tab, %curargs, $new, $eval_index, $dir, $name, $args, $outfile); my ($incl, $incl_type, $incl_quote, $next); while (defined (my $file = next_file())) { if (-l $file and -d $file) { link_if_possible($file) if ($opt_l); next; } # Recover from header files with unbalanced cpp directives $t = ''; $tab = 0; # $eval_index goes into '#line' directives, to help locate syntax errors: $eval_index = 1; if ($file eq '-') { open(IN, "-"); open(OUT, ">-"); } else { ($outfile = $file) =~ s/\.h$/.ph/ || next; print "$file -> $outfile\n" unless $opt_Q; if ($file =~ m|^(.*)/|) { $dir = $1; mkpath "$Dest_dir/$dir"; } if ($opt_a) { # automagic mode: locate header file in @inc_dirs foreach (@inc_dirs) { chdir $_; last if -f $file; } } open(IN,"$file") || (($Exit = 1),(warn "Can't open $file: $!\n"),next); open(OUT,">$Dest_dir/$outfile") || die "Can't create $outfile: $!\n"; } print OUT "require '_h2ph_pre.ph';\n\n", "no warnings qw(redefine misc);\n\n"; while (defined (local $_ = next_line($file))) { if (s/^\s*\#\s*//) { if (s/^define\s+(\w+)//) { $name = $1; $new = ''; s/\s+$//; s/\(\w+\s*\(\*\)\s*\(\w*\)\)\s*(-?\d+)/$1/; # (int (*)(foo_t))0 if (s/^\(([\w,\s]*)\)//) { $args = $1; my $proto = '() '; if ($args ne '') { $proto = ''; foreach my $arg (split(/,\s*/,$args)) { $arg =~ s/^\s*([^\s].*[^\s])\s*$/$1/; $curargs{$arg} = 1; } $args =~ s/\b(\w)/\$$1/g; $args = "my($args) = \@_;\n$t "; } s/^\s+//; expr(); $new =~ s/(["\\])/\\$1/g; #"]); EMIT($proto); } else { s/^\s+//; expr(); $new = 1 if $new eq ''; # Shunt around such directives as '#define FOO FOO': next if $new =~ /^\s*&\Q$name\E\s*\z/; $new = reindent($new); $args = reindent($args); $new =~ s/(['\\])/\\$1/g; #']); print OUT $t, 'eval '; if ($opt_h) { print OUT "\"\\n#line $eval_index $outfile\\n\" . "; $eval_index++; } print OUT "'sub $name () {$new;}' unless defined(&$name);\n"; } } elsif (/^(include|import|include_next)\s*([<\"])(.*)[>\"]/) { $incl_type = $1; $incl_quote = $2; $incl = $3; if (($incl_type eq 'include_next') || ($opt_e && exists($bad_file{$incl}))) { $incl =~ s/\.h$/.ph/; print OUT ($t, "eval {\n"); $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); print OUT ($t, "my(\@REM);\n"); if ($incl_type eq 'include_next') { print OUT ($t, "my(\%INCD) = map { \$INC{\$_} => 1 } ", "(grep { \$_ eq \"$incl\" } ", "keys(\%INC));\n"); print OUT ($t, "\@REM = map { \"\$_/$incl\" } ", "(grep { not exists(\$INCD{\"\$_/$incl\"})", " and -f \"\$_/$incl\" } \@INC);\n"); } else { print OUT ($t, "\@REM = map { \"\$_/$incl\" } ", "(grep {-r \"\$_/$incl\" } \@INC);\n"); } print OUT ($t, "require \"\$REM[0]\" if \@REM;\n"); $tab -= 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); print OUT ($t, "};\n"); print OUT ($t, "warn(\$\@) if \$\@;\n"); } else { $incl =~ s/\.h$/.ph/; # copy the prefix in the quote syntax (#include "x.h") case if ($incl !~ m|/| && $incl_quote eq q{"} && $file =~ m|^(.*)/|) { $incl = "$1/$incl"; } print OUT $t,"require '$incl';\n"; } } elsif (/^ifdef\s+(\w+)/) { print OUT $t,"if(defined(&$1)) {\n"; $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); } elsif (/^ifndef\s+(\w+)/) { print OUT $t,"unless(defined(&$1)) {\n"; $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); } elsif (s/^if\s+//) { $new = ''; $inif = 1; expr(); $inif = 0; print OUT $t,"if($new) {\n"; $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); } elsif (s/^elif\s+//) { $new = ''; $inif = 1; expr(); $inif = 0; $tab -= 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); print OUT $t,"}\n elsif($new) {\n"; $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); } elsif (/^else/) { $tab -= 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); print OUT $t,"} else {\n"; $tab += 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); } elsif (/^endif/) { $tab -= 4; $t = "\t" x ($tab / 8) . ' ' x ($tab % 8); print OUT $t,"}\n"; } elsif(/^undef\s+(\w+)/) { print OUT $t, "undef(&$1) if defined(&$1);\n"; } elsif(/^error\s+(".*")/) { print OUT $t, "die($1);\n"; } elsif(/^error\s+(.*)/) { print OUT $t, "die(\"", quotemeta($1), "\");\n"; } elsif(/^warning\s+(.*)/) { print OUT $t, "warn(\"", quotemeta($1), "\");\n"; } elsif(/^ident\s+(.*)/) { print OUT $t, "# $1\n"; } } elsif (/^\s*(typedef\s*)?enum\s*(\s+[a-zA-Z_]\w*\s*)?/) { # { for vi until(/\{[^}]*\}.*;/ || /;/) { last unless defined ($next = next_line($file)); chomp $next; # drop "#define FOO FOO" in enums $next =~ s/^\s*#\s*define\s+(\w+)\s+\1\s*$//; # #defines in enums (aliases) $next =~ s/^\s*#\s*define\s+(\w+)\s+(\w+)\s*$/$1 = $2,/; $_ .= $next; print OUT "# $next\n" if $opt_D; } s/#\s*if.*?#\s*endif//g; # drop #ifdefs s@/\*.*?\*/@@g; s/\s+/ /g; next unless /^\s?(typedef\s?)?enum\s?([a-zA-Z_]\w*)?\s?\{(.*)\}\s?([a-zA-Z_]\w*)?\s?;/; (my $enum_subs = $3) =~ s/\s//g; my @enum_subs = split(/,/, $enum_subs); my $enum_val = -1; foreach my $enum (@enum_subs) { my ($enum_name, $enum_value) = $enum =~ /^([a-zA-Z_]\w*)(=.+)?$/; $enum_name or next; $enum_value =~ s/^=//; $enum_val = (length($enum_value) ? $enum_value : $enum_val + 1); if ($opt_h) { print OUT ($t, "eval(\"\\n#line $eval_index $outfile\\n", "sub $enum_name () \{ $enum_val; \}\") ", "unless defined(\&$enum_name);\n"); ++ $eval_index; } else { print OUT ($t, "eval(\"sub $enum_name () \{ $enum_val; \}\") ", "unless defined(\&$enum_name);\n"); } } } elsif (/^(?:__extension__\s+)?(?:extern|static)\s+(?:__)?inline(?:__)?\s+/ and !/;\s*$/ and !/{\s*}\s*$/) { # { for vi # This is a hack to parse the inline functions in the glibc headers. # Warning: massive kludge ahead. We suppose inline functions # are mainly constructed like macros. while (1) { last unless defined ($next = next_line($file)); chomp $next; undef $_, last if $next =~ /__THROW\s*;/ or $next =~ /^(__extension__|extern|static)\b/; $_ .= " $next"; print OUT "# $next\n" if $opt_D; last if $next =~ /^}|^{.*}\s*$/; } next if not defined; # because it's only a prototype s/\b(__extension__|extern|static|(?:__)?inline(?:__)?)\b//g; # violently drop #ifdefs s/#\s*if.*?#\s*endif//g and print OUT "# some #ifdef were dropped here -- fill in the blanks\n"; if (s/^(?:\w|\s|\*)*\s(\w+)\s*//) { $name = $1; } else { warn "name not found"; next; # shouldn't occur... } my @args; if (s/^\(([^()]*)\)\s*(\w+\s*)*//) { for my $arg (split /,/, $1) { if ($arg =~ /(\w+)\s*$/) { $curargs{$1} = 1; push @args, $1; } } } $args = ( @args ? "my(" . (join ',', map "\$$_", @args) . ") = \@_;\n$t " : "" ); my $proto = @args ? '' : '() '; $new = ''; s/\breturn\b//g; # "return" doesn't occur in macros usually... expr(); # try to find and perlify local C variables our @local_variables = (); # needs to be a our(): (?{...}) bug workaround { use re "eval"; my $typelist = join '|', keys %isatype; $new =~ s[' (?:(?:__)?const(?:__)?\s+)? (?:(?:un)?signed\s+)? (?:long\s+)? (?:$typelist)\s+ (\w+) (?{ push @local_variables, $1 }) '] [my \$$1]gx; $new =~ s[' (?:(?:__)?const(?:__)?\s+)? (?:(?:un)?signed\s+)? (?:long\s+)? (?:$typelist)\s+ ' \s+ &(\w+) \s* ; (?{ push @local_variables, $1 }) ] [my \$$1;]gx; } $new =~ s/&$_\b/\$$_/g for @local_variables; $new =~ s/(["\\])/\\$1/g; #"]); # now that's almost like a macro (we hope) EMIT($proto); } } $Is_converted{$file} = 1; if ($opt_e && exists($bad_file{$file})) { unlink($Dest_dir . '/' . $outfile); $next = ''; } else { print OUT "1;\n"; queue_includes_from($file) if $opt_a; } } if ($opt_e && (scalar(keys %bad_file) > 0)) { warn "Was unable to convert the following files:\n"; warn "\t" . join("\n\t",sort(keys %bad_file)) . "\n"; } exit $Exit; sub EMIT { my $proto = shift; $new = reindent($new); $args = reindent($args); if ($t ne '') { $new =~ s/(['\\])/\\$1/g; #']); if ($opt_h) { print OUT $t, "eval \"\\n#line $eval_index $outfile\\n\" . 'sub $name $proto\{\n$t ${args}eval q($new);\n$t}' unless defined(\&$name);\n"; $eval_index++; } else { print OUT $t, "eval 'sub $name $proto\{\n$t ${args}eval q($new);\n$t}' unless defined(\&$name);\n"; } } else { print OUT "unless(defined(\&$name)) {\n sub $name $proto\{\n\t${args}eval q($new);\n }\n}\n"; } %curargs = (); return; } sub expr { if (/\b__asm__\b/) { # freak out $new = '"(assembly code)"'; return } my $joined_args; if(keys(%curargs)) { $joined_args = join('|', keys(%curargs)); } while ($_ ne '') { s/^\&\&// && do { $new .= " &&"; next;}; # handle && operator s/^\&([\(a-z\)]+)/$1/i; # hack for things that take the address of s/^(\s+)// && do {$new .= ' '; next;}; s/^0X([0-9A-F]+)[UL]*//i && do {my $hex = $1; $hex =~ s/^0+//; if (length $hex > 8 && !$Config{use64bitint}) { # Croak if nv_preserves_uv_bits < 64 ? $new .= hex(substr($hex, -8)) + 2**32 * hex(substr($hex, 0, -8)); # The above will produce "erroneous" code # if the hex constant was e.g. inside UINT64_C # macro, but then again, h2ph is an approximation. } else { $new .= lc("0x$hex"); } next;}; s/^(-?\d+\.\d+E[-+]?\d+)[FL]?//i && do {$new .= $1; next;}; s/^(\d+)\s*[LU]*//i && do {$new .= $1; next;}; s/^("(\\"|[^"])*")// && do {$new .= $1; next;}; s/^'((\\"|[^"])*)'// && do { if ($curargs{$1}) { $new .= "ord('\$$1')"; } else { $new .= "ord('$1')"; } next; }; # replace "sizeof(foo)" with "{foo}" # also, remove * (C dereference operator) to avoid perl syntax # problems. Where the %sizeof array comes from is anyone's # guess (c2ph?), but this at least avoids fatal syntax errors. # Behavior is undefined if sizeof() delimiters are unbalanced. # This code was modified to able to handle constructs like this: # sizeof(*(p)), which appear in the HP-UX 10.01 header files. s/^sizeof\s*\(// && do { $new .= '$sizeof'; my $lvl = 1; # already saw one open paren # tack { on the front, and skip it in the loop $_ = "{" . "$_"; my $index = 1; # find balanced closing paren while ($index <= length($_) && $lvl > 0) { $lvl++ if substr($_, $index, 1) eq "("; $lvl-- if substr($_, $index, 1) eq ")"; $index++; } # tack } on the end, replacing ) substr($_, $index - 1, 1) = "}"; # remove pesky * operators within the sizeof argument substr($_, 0, $index - 1) =~ s/\*//g; next; }; # Eliminate typedefs /\(([\w\s]+)[\*\s]*\)\s*[\w\(]/ && do { my $doit = 1; foreach (split /\s+/, $1) { # Make sure all the words are types, unless($isatype{$_} or $_ eq 'struct' or $_ eq 'union'){ $doit = 0; last; } } if( $doit ){ s/\([\w\s]+[\*\s]*\)// && next; # then eliminate them. } }; # struct/union member, including arrays: s/^([_A-Z]\w*(\[[^\]]+\])?((\.|->)[_A-Z]\w*(\[[^\]]+\])?)+)//i && do { my $id = $1; $id =~ s/(\.|(->))([^\.\-]*)/->\{$3\}/g; $id =~ s/\b([^\$])($joined_args)/$1\$$2/g if length($joined_args); while($id =~ /\[\s*([^\$\&\d\]]+)\]/) { my($index) = $1; $index =~ s/\s//g; if(exists($curargs{$index})) { $index = "\$$index"; } else { $index = "&$index"; } $id =~ s/\[\s*([^\$\&\d\]]+)\]/[$index]/; } $new .= " (\$$id)"; }; s/^([_a-zA-Z]\w*)// && do { my $id = $1; if ($id eq 'struct' || $id eq 'union') { s/^\s+(\w+)//; $id .= ' ' . $1; $isatype{$id} = 1; } elsif ($id =~ /^((un)?signed)|(long)|(short)$/) { while (s/^\s+(\w+)//) { $id .= ' ' . $1; } $isatype{$id} = 1; } if ($curargs{$id}) { $new .= "\$$id"; $new .= '->' if /^[\[\{]/; } elsif ($id eq 'defined') { $new .= 'defined'; } elsif (/^\s*\(/) { s/^\s*\((\w),/("$1",/ if $id =~ /^_IO[WR]*$/i; # cheat $new .= " &$id"; } elsif ($isatype{$id}) { if ($new =~ /\{\s*$/) { $new .= "'$id'"; } elsif ($new =~ /\(\s*$/ && /^[\s*]*\)/) { $new =~ s/\(\s*$//; s/^[\s*]*\)//; } else { $new .= q(').$id.q('); } } else { if ($inif) { if ($new =~ /defined\s*$/) { $new .= '(&' . $id . ')'; } elsif ($new =~ /defined\s*\($/) { $new .= '&' . $id; } else { $new .= '(defined(&' . $id . ') ? &' . $id . ' : undef)'; } } elsif (/^\[/) { $new .= " \$$id"; } else { $new .= ' &' . $id; } } next; }; s/^(.)// && do { if ($1 ne '#') { $new .= $1; } next;}; } } sub next_line { my $file = shift; my ($in, $out); my $pre_sub_tri_graphs = 1; READ: while (not eof IN) { $in .= <IN>; chomp $in; next unless length $in; while (length $in) { if ($pre_sub_tri_graphs) { # Preprocess all tri-graphs # including things stuck in quoted string constants. $in =~ s/\?\?=/#/g; # | ??=| #| $in =~ s/\?\?\!/|/g; # | ??!| || $in =~ s/\?\?'/^/g; # | ??'| ^| $in =~ s/\?\?\(/[/g; # | ??(| [| $in =~ s/\?\?\)/]/g; # | ??)| ]| $in =~ s/\?\?\-/~/g; # | ??-| ~| $in =~ s/\?\?\//\\/g; # | ??/| \| $in =~ s/\?\?</{/g; # | ??<| {| $in =~ s/\?\?>/}/g; # | ??>| }| } if ($in =~ /^\#ifdef __LANGUAGE_PASCAL__/) { # Tru64 disassembler.h evilness: mixed C and Pascal. while (<IN>) { last if /^\#endif/; } $in = ""; next READ; } if ($in =~ /^extern inline / && # Inlined assembler. $^O eq 'linux' && $file =~ m!(?:^|/)asm/[^/]+\.h$!) { while (<IN>) { last if /^}/; } $in = ""; next READ; } if ($in =~ s/\\$//) { # \-newline $out .= ' '; next READ; } elsif ($in =~ s/^([^"'\\\/]+)//) { # Passthrough $out .= $1; } elsif ($in =~ s/^(\\.)//) { # \... $out .= $1; } elsif ($in =~ /^'/) { # '... if ($in =~ s/^('(\\.|[^'\\])*')//) { $out .= $1; } else { next READ; } } elsif ($in =~ /^"/) { # "... if ($in =~ s/^("(\\.|[^"\\])*")//) { $out .= $1; } else { next READ; } } elsif ($in =~ s/^\/\/.*//) { # //... # fall through } elsif ($in =~ m/^\/\*/) { # /*... # C comment removal adapted from perlfaq6: if ($in =~ s/^\/\*[^*]*\*+([^\/*][^*]*\*+)*\///) { $out .= ' '; } else { # Incomplete /* */ next READ; } } elsif ($in =~ s/^(\/)//) { # /... $out .= $1; } elsif ($in =~ s/^([^\'\"\\\/]+)//) { $out .= $1; } elsif ($^O eq 'linux' && $file =~ m!(?:^|/)linux/byteorder/pdp_endian\.h$! && $in =~ s!\'T KNOW!!) { $out =~ s!I DON$!I_DO_NOT_KNOW!; } else { if ($opt_e) { warn "Cannot parse $file:\n$in\n"; $bad_file{$file} = 1; $in = ''; $out = undef; last READ; } else { die "Cannot parse:\n$in\n"; } } } last READ if $out =~ /\S/; } return $out; } # Handle recursive subdirectories without getting a grotesquely big stack. # Could this be implemented using File::Find? sub next_file { my $file; while (@ARGV) { $file = shift @ARGV; if ($file eq '-' or -f $file or -l $file) { return $file; } elsif (-d $file) { if ($opt_r) { expand_glob($file); } else { print STDERR "Skipping directory '$file'\n"; } } elsif ($opt_a) { return $file; } else { print STDERR "Skipping '$file': not a file or directory\n"; } } return undef; } # Put all the files in $directory into @ARGV for processing. sub expand_glob { my ($directory) = @_; $directory =~ s:/$::; opendir DIR, $directory; foreach (readdir DIR) { next if ($_ eq '.' or $_ eq '..'); # expand_glob() is going to be called until $ARGV[0] isn't a # directory; so push directories, and unshift everything else. if (-d "$directory/$_") { push @ARGV, "$directory/$_" } else { unshift @ARGV, "$directory/$_" } } closedir DIR; } # Given $file, a symbolic link to a directory in the C include directory, # make an equivalent symbolic link in $Dest_dir, if we can figure out how. # Otherwise, just duplicate the file or directory. sub link_if_possible { my ($dirlink) = @_; my $target = eval 'readlink($dirlink)'; if ($target =~ m:^\.\./: or $target =~ m:^/:) { # The target of a parent or absolute link could leave the $Dest_dir # hierarchy, so let's put all of the contents of $dirlink (actually, # the contents of $target) into @ARGV; as a side effect down the # line, $dirlink will get created as an _actual_ directory. expand_glob($dirlink); } else { if (-l "$Dest_dir/$dirlink") { unlink "$Dest_dir/$dirlink" or print STDERR "Could not remove link $Dest_dir/$dirlink: $!\n"; } if (eval 'symlink($target, "$Dest_dir/$dirlink")') { print "Linking $target -> $Dest_dir/$dirlink\n"; # Make sure that the link _links_ to something: if (! -e "$Dest_dir/$target") { mkpath("$Dest_dir/$target", 0755) or print STDERR "Could not create $Dest_dir/$target/\n"; } } else { print STDERR "Could not symlink $target -> $Dest_dir/$dirlink: $!\n"; } } } # Push all #included files in $file onto our stack, except for STDIN # and files we've already processed. sub queue_includes_from { my ($file) = @_; my $line; return if ($file eq "-"); open HEADER, $file or return; while (defined($line = <HEADER>)) { while (/\\$/) { # Handle continuation lines chop $line; $line .= <HEADER>; } if ($line =~ /^#\s*include\s+([<"])(.*?)[>"]/) { my ($delimiter, $new_file) = ($1, $2); # copy the prefix in the quote syntax (#include "x.h") case if ($delimiter eq q{"} && $file =~ m|^(.*)/|) { $new_file = "$1/$new_file"; } push(@ARGV, $new_file) unless $Is_converted{$new_file}; } } close HEADER; } # Determine include directories; $Config{usrinc} should be enough for (all # non-GCC?) C compilers, but gcc uses additional include directories. sub inc_dirs { my $from_gcc = `LC_ALL=C $Config{cc} -v -E - < /dev/null 2>&1 | awk '/^#include/, /^End of search list/' | grep '^ '`; length($from_gcc) ? (split(' ', $from_gcc), $Config{usrinc}) : ($Config{usrinc}); } # Create "_h2ph_pre.ph", if it doesn't exist or was built by a different # version of h2ph. sub build_preamble_if_necessary { # Increment $VERSION every time this function is modified: my $VERSION = 3; my $preamble = "$Dest_dir/_h2ph_pre.ph"; # Can we skip building the preamble file? if (-r $preamble) { # Extract version number from first line of preamble: open PREAMBLE, $preamble or die "Cannot open $preamble: $!"; my $line = <PREAMBLE>; $line =~ /(\b\d+\b)/; close PREAMBLE or die "Cannot close $preamble: $!"; # Don't build preamble if a compatible preamble exists: return if $1 == $VERSION; } my (%define) = _extract_cc_defines(); open PREAMBLE, ">$preamble" or die "Cannot open $preamble: $!"; print PREAMBLE "# This file was created by h2ph version $VERSION\n"; foreach (sort keys %define) { if ($opt_D) { print PREAMBLE "# $_=$define{$_}\n"; } if ($define{$_} =~ /^\((.*)\)$/) { # parenthesized value: d=(v) $define{$_} = $1; } if (/^(\w+)\((\w)\)$/) { my($macro, $arg) = ($1, $2); my $def = $define{$_}; $def =~ s/$arg/\$\{$arg\}/g; print PREAMBLE <<DEFINE; unless (defined &$macro) { sub $macro(\$) { my (\$$arg) = \@_; \"$def\" } } DEFINE } elsif ($define{$_} =~ /^([+-]?(\d+)?\.\d+([eE][+-]?\d+)?)[FL]?$/) { # float: print PREAMBLE "unless (defined &$_) { sub $_() { $1 } }\n\n"; } elsif ($define{$_} =~ /^([+-]?\d+)U?L{0,2}$/i) { # integer: print PREAMBLE "unless (defined &$_) { sub $_() { $1 } }\n\n"; } elsif ($define{$_} =~ /^\w+$/) { my $def = $define{$_}; if ($isatype{$def}) { print PREAMBLE "unless (defined &$_) { sub $_() { \"$def\" } }\n\n"; } else { print PREAMBLE "unless (defined &$_) { sub $_() { &$def } }\n\n"; } } else { print PREAMBLE "unless (defined &$_) { sub $_() { \"", quotemeta($define{$_}), "\" } }\n\n"; } } print PREAMBLE "\n1;\n"; # avoid 'did not return a true value' when empty close PREAMBLE or die "Cannot close $preamble: $!"; } # %Config contains information on macros that are pre-defined by the # system's compiler. We need this information to make the .ph files # function with perl as the .h files do with cc. sub _extract_cc_defines { my %define; my $allsymbols = join " ", @Config{'ccsymbols', 'cppsymbols', 'cppccsymbols'}; # Split compiler pre-definitions into 'key=value' pairs: while ($allsymbols =~ /([^\s]+)=((\\\s|[^\s])+)/g) { $define{$1} = $2; if ($opt_D) { print STDERR "$_: $1 -> $2\n"; } } return %define; } 1; ############################################################################## __END__ =head1 NAME h2ph - convert .h C header files to .ph Perl header files =head1 SYNOPSIS B<h2ph [-d destination directory] [-r | -a] [-l] [-h] [-e] [-D] [-Q] [headerfiles]> =head1 DESCRIPTION I<h2ph> converts any C header files specified to the corresponding Perl header file format. It is most easily run while in /usr/include: cd /usr/include; h2ph * sys/* or cd /usr/include; h2ph * sys/* arpa/* netinet/* or cd /usr/include; h2ph -r -l . The output files are placed in the hierarchy rooted at Perl's architecture dependent library directory. You can specify a different hierarchy with a B<-d> switch. If run with no arguments, filters standard input to standard output. =head1 OPTIONS =over 4 =item -d destination_dir Put the resulting B<.ph> files beneath B<destination_dir>, instead of beneath the default Perl library location (C<$Config{'installsitearch'}>). =item -r Run recursively; if any of B<headerfiles> are directories, then run I<h2ph> on all files in those directories (and their subdirectories, etc.). B<-r> and B<-a> are mutually exclusive. =item -a Run automagically; convert B<headerfiles>, as well as any B<.h> files which they include. This option will search for B<.h> files in all directories which your C compiler ordinarily uses. B<-a> and B<-r> are mutually exclusive. =item -l Symbolic links will be replicated in the destination directory. If B<-l> is not specified, then links are skipped over. =item -h Put 'hints' in the .ph files which will help in locating problems with I<h2ph>. In those cases when you B<require> a B<.ph> file containing syntax errors, instead of the cryptic [ some error condition ] at (eval mmm) line nnn you will see the slightly more helpful [ some error condition ] at filename.ph line nnn However, the B<.ph> files almost double in size when built using B<-h>. =item -e If an error is encountered during conversion, output file will be removed and a warning emitted instead of terminating the conversion immediately. =item -D Include the code from the B<.h> file as a comment in the B<.ph> file. This is primarily used for debugging I<h2ph>. =item -Q 'Quiet' mode; don't print out the names of the files being converted. =back =head1 ENVIRONMENT No environment variables are used. =head1 FILES /usr/include/*.h /usr/include/sys/*.h etc. =head1 AUTHOR Larry Wall =head1 SEE ALSO perl(1) =head1 DIAGNOSTICS The usual warnings if it can't read or write the files involved. =head1 BUGS Doesn't construct the %sizeof array for you. It doesn't handle all C constructs, but it does attempt to isolate definitions inside evals so that you can get at the definitions that it can translate. It's only intended as a rough tool. You may need to dicker with the files produced. You have to run this program by hand; it's not run as part of the Perl installation. Doesn't handle complicated expressions built piecemeal, a la: enum { FIRST_VALUE, SECOND_VALUE, #ifdef ABC THIRD_VALUE #endif }; Doesn't necessarily locate all of your C compiler's internally-defined symbols. =cut
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