print OUT <<'!NO!SUBS!';
+use strict;
+
use Config;
use File::Path qw(mkpath);
use Getopt::Std;
-getopts('Dd:rlhaQ');
+# 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);
-@inc_dirs = inc_dirs() if $opt_a;
+my @inc_dirs = inc_dirs() if $opt_a;
my $Exit = 0;
die "Destination directory $Dest_dir doesn't exist or isn't a directory\n"
unless -d $Dest_dir;
-@isatype = split(' ',<<END);
+my @isatype = qw(
char uchar u_char
short ushort u_short
int uint u_int
long ulong u_long
FILE key_t caddr_t
-END
+ float double size_t
+);
+my %isatype;
@isatype{@isatype} = (1) x @isatype;
-$inif = 0;
+my $inif = 0;
+my %Is_converted;
+my %bad_file = ();
@ARGV = ('-') unless @ARGV;
-while (defined ($file = next_file())) {
+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;
$t = '';
$tab = 0;
- # $eval_index goes into ``#line'' directives, to help locate syntax errors:
+ # $eval_index goes into '#line' directives, to help locate syntax errors:
$eval_index = 1;
if ($file eq '-') {
open(IN,"$file") || (($Exit = 1),(warn "Can't open $file: $!\n"),next);
open(OUT,">$Dest_dir/$outfile") || die "Can't create $outfile: $!\n";
}
- while (<IN>) {
- chop;
- while (/\\$/) {
- chop;
- $_ .= <IN>;
- chop;
- }
- print OUT "# $_\n" if $opt_D;
- if (s:/\*:\200:g) {
- s:\*/:\201:g;
- s/\200[^\201]*\201//g; # delete single line comments
- if (s/\200.*//) { # begin multi-line comment?
- $_ .= '/*';
- $_ .= <IN>;
- redo;
- }
- }
+
+ 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 = '() ';
+ my $proto = '() ';
if ($args ne '') {
- $proto = '';
- foreach $arg (split(/,\s*/,$args)) {
+ $proto = '';
+ foreach my $arg (split(/,\s*/,$args)) {
$arg =~ s/^\s*([^\s].*[^\s])\s*$/$1/;
$curargs{$arg} = 1;
}
$args =~ s/\b(\w)/\$$1/g;
- $args = "local($args) = \@_;\n$t ";
+ $args = "my($args) = \@_;\n$t ";
}
s/^\s+//;
expr();
$new =~ s/(["\\])/\\$1/g; #"]);
- $new = reindent($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($new);\n }\n}\n";
- }
- %curargs = ();
+ EMIT($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);
- if ($t ne '') {
- $new =~ s/(['\\])/\\$1/g; #']);
- if ($opt_h) {
- print OUT $t,"eval \"\\n#line $eval_index $outfile\\n\" . 'sub $name () {",$new,";}' unless defined(\&$name);\n";
- $eval_index++;
- } else {
- print OUT $t,"eval 'sub $name () {",$new,";}' unless defined(\&$name);\n";
- }
- } else {
- print OUT $t,"unless(defined(\&$name)) {\n sub $name () {\t",$new,";}\n}\n";
+ $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(&$name);\n";
}
- } elsif (/^(include|import)\s*[<"](.*)[>"]/) {
- ($incl = $2) =~ s/\.h$/.ph/;
- print OUT $t,"require '$incl';\n";
- } elsif(/^include_next\s*[<"](.*)[>"]/) {
- ($incl = $1) =~ s/\.h$/.ph/;
+ } 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 \"$incl\" } keys(\%INC));\n");
+ "(grep { \$_ eq \"$incl\" } ",
+ "keys(\%INC));\n");
print OUT ($t,
- "my(\@REM) = map { \"\$_/$incl\" } ",
+ "\@REM = map { \"\$_/$incl\" } ",
"(grep { not exists(\$INCD{\"\$_/$incl\"})",
- "and -f \"\$_/$incl\" } \@INC);\n");
+ " and -f \"\$_/$incl\" } \@INC);\n");
+ } else {
+ print OUT ($t,
+ "\@REM = map { \"\$_/$incl\" } ",
+ "(grep {-r \"\$_/$incl\" } \@INC);\n");
+ }
print OUT ($t,
"require \"\$REM[0]\" if \@REM;\n");
$tab -= 4;
"};\n");
print OUT ($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;
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(\"$1\");\n";
+ print OUT $t, "die(\"", quotemeta($1), "\");\n";
} elsif(/^warning\s+(.*)/) {
- print OUT $t, "warn(\"$1\");\n";
+ print OUT $t, "warn(\"", quotemeta($1), "\");\n";
} elsif(/^ident\s+(.*)/) {
print OUT $t, "# $1\n";
}
- } elsif(/^\s*(typedef\s*)?enum\s*(\s+[a-zA-Z_]\w*\s*)?\{/) {
- until(/\}.*?;/) {
- chomp($next = <IN>);
+ } 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 $opt_D;
}
+ s/#\s*if.*?#\s*endif//g; # drop #ifdefs
s@/\*.*?\*/@@g;
s/\s+/ /g;
- /^\s?(typedef\s?)?enum\s?([a-zA-Z_]\w*)?\s?\{(.*)\}\s?([a-zA-Z_]\w*)?\s?;/;
- ($enum_subs = $3) =~ s/\s//g;
- @enum_subs = split(/,/, $enum_subs);
- $enum_val = -1;
- for $enum (@enum_subs) {
- ($enum_name, $enum_value) = $enum =~ /^([a-zA-Z_]\w*)(=.+)?$/;
+ 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) {
"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);
}
}
- print OUT "1;\n";
+ $Is_converted{$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;
+ }
+}
- $is_converted{$file} = 1;
- 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 $Exit;
-sub reindent($) {
- my($text) = shift;
- $text =~ s/\n/\n /g;
- $text =~ s/ /\t/g;
- $text;
+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 $joined_args;
if(keys(%curargs)) {
- my($joined_args) = join('|', 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 {$new .= lc($1); next;};
- s/^(-?\d+\.\d+E[-+]\d+)F?//i && do {$new .= $1; 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 {
};
# Eliminate typedefs
/\(([\w\s]+)[\*\s]*\)\s*[\w\(]/ && do {
+ my $doit = 1;
foreach (split /\s+/, $1) { # Make sure all the words are types,
- last unless ($isatype{$_} or $_ eq 'struct');
+ unless($isatype{$_} or $_ eq 'struct' or $_ eq 'union'){
+ $doit = 0;
+ last;
+ }
+ }
+ if( $doit ){
+ s/\([\w\s]+[\*\s]*\)// && next; # then eliminate them.
}
- s/\([\w\s]+[\*\s]*\)// && next; # then eliminate them.
};
# struct/union member, including arrays:
s/^([_A-Z]\w*(\[[^\]]+\])?((\.|->)[_A-Z]\w*(\[[^\]]+\])?)+)//i && do {
- $id = $1;
+ my $id = $1;
$id =~ s/(\.|(->))([^\.\-]*)/->\{$3\}/g;
$id =~ s/\b([^\$])($joined_args)/$1\$$2/g if length($joined_args);
while($id =~ /\[\s*([^\$\&\d\]]+)\]/) {
$new .= " (\$$id)";
};
s/^([_a-zA-Z]\w*)// && do {
- $id = $1;
- if ($id eq 'struct') {
+ my $id = $1;
+ if ($id eq 'struct' || $id eq 'union') {
s/^\s+(\w+)//;
$id .= ' ' . $1;
$isatype{$id} = 1;
$new .= '->' if /^[\[\{]/;
} elsif ($id eq 'defined') {
$new .= 'defined';
- } elsif (/^\(/) {
- s/^\((\w),/("$1",/ if $id =~ /^_IO[WR]*$/i; # cheat
+ } elsif (/^\s*\(/) {
+ s/^\s*\((\w),/("$1",/ if $id =~ /^_IO[WR]*$/i; # cheat
$new .= " &$id";
} elsif ($isatype{$id}) {
- if ($new =~ /{\s*$/) {
+ if ($new =~ /\{\s*$/) {
$new .= "'$id'";
} elsif ($new =~ /\(\s*$/ && /^[\s*]*\)/) {
$new =~ s/\(\s*$//;
$new .= q(').$id.q(');
}
} else {
- if ($inif && $new !~ /defined\s*\($/) {
- $new .= '(defined(&' . $id . ') ? &' . $id . ' : 0)';
+ if ($inif) {
+ if ($new =~ /defined\s*$/) {
+ $new .= '(&' . $id . ')';
+ } elsif ($new =~ /defined\s*\($/) {
+ $new .= '&' . $id;
+ } else {
+ $new .= '(defined(&' . $id . ') ? &' . $id . ' : undef)';
+ }
} elsif (/^\[/) {
$new .= " \$$id";
} else {
}
+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 $out;
+}
+
+
# Handle recursive subdirectories without getting a grotesquely big stack.
# Could this be implemented using File::Find?
sub next_file
if ($opt_r) {
expand_glob($file);
} else {
- print STDERR "Skipping directory `$file'\n";
+ print STDERR "Skipping directory '$file'\n";
}
} elsif ($opt_a) {
return $file;
} else {
- print STDERR "Skipping `$file': not a file or directory\n";
+ print STDERR "Skipping '$file': not a file or directory\n";
}
}
$line .= <HEADER>;
}
- if ($line =~ /^#\s*include\s+<(.*?)>/) {
- push(@ARGV, $1) unless $is_converted{$1};
+ if ($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 an additional include directory.
+# non-GCC?) C compilers, but gcc uses additional include directories.
sub inc_dirs
{
- my $from_gcc = `$Config{cc} -v 2>&1`;
- $from_gcc =~ s:^Reading specs from (.*?)/specs\b.*:$1/include:s;
+ 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 -> $2\n";
+ }
+ }
- length($from_gcc) ? ($from_gcc, $Config{usrinc}) : ($Config{usrinc});
+ return %define;
}
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
=item -d destination_dir
Put the resulting B<.ph> files beneath B<destination_dir>, instead of
-beneath the default Perl library location (C<$Config{'installsitsearch'}>).
+beneath the default Perl library location (C<$Config{'installsitearch'}>).
=item -r
=item -h
-Put ``hints'' in the .ph files which will help in locating problems with
+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
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
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
!NO!SUBS!
https://perl5.git.perl.org / perl5.git / blobdiff