aeeef43f45
1999-11-28 Martin Baulig <martin@home-of-linux.org> * lib/lib.pl: We now have a new, more extensible client/server communication model. Include `$(top_srcdir)/scripts/c_types.pl' here.
296 lines
8.7 KiB
Perl
Executable File
296 lines
8.7 KiB
Perl
Executable File
#!/usr/bin/perl
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require 'c_types.pl';
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$[ = 1; # set array base to 1
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$, = ' '; # set output field separator
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$\ = "\n"; # set output record separator
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$always_use_temp_storage = 1;
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sub toupper {
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local($_) = @_;
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tr/a-z/A-Z/;
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return $_;
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}
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sub tolower {
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local($_) = @_;
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tr/A-Z/a-z/;
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return $_;
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}
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print '/* lib.c */';
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print "/* This is a generated file. Please modify `lib.pl' */";
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print '';
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print '#include <glibtop.h>';
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print '#include <glibtop/open.h>';
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print '#include <glibtop/xmalloc.h>';
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print '';
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print '#include <glibtop/sysdeps.h>';
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print '#include <glibtop/union.h>';
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print '';
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print '#include <glibtop/command.h>';
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print '';
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print '/* Some required fields are missing. */';
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print '';
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print 'static void';
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print '_glibtop_missing_feature (glibtop *server, const char *feature,';
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print "\t\t\t const u_int64_t present, u_int64_t *required)";
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print '{';
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print "\tu_int64_t old_required = *required;\n";
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print "\t/* Return if we have all required fields. */";
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print "\tif ((~present & old_required) == 0)";
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print "\t\treturn;\n";
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print "\tswitch (server->error_method) {";
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print "\tcase GLIBTOP_ERROR_METHOD_WARN_ONCE:";
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print "\t\t*required &= present;";
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print "\tcase GLIBTOP_ERROR_METHOD_WARN:";
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print "\t\tglibtop_warn_r (server,";
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print "\t\t\t\t_(\"glibtop_get_%s (): Client requested \"";
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print "\t\t\t\t \"field mask %05lx, but only have %05lx.\"),";
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print "\t\t\t\t feature, (unsigned long) old_required,";
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print "\t\t\t\t (unsigned long) present);";
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print "\t\tbreak;";
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print "\tcase GLIBTOP_ERROR_METHOD_ABORT:";
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print "\t\tglibtop_error_r (server,";
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print "\t\t\t\t _(\"glibtop_get_%s (): Client requested \"";
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print "\t\t\t\t \"field mask %05lx, but only have %05lx.\"),";
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print "\t\t\t\t feature, (unsigned long) old_required,";
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print "\t\t\t\t (unsigned long) present);";
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print "\t\tbreak;";
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print "\t}";
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print '}';
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print '';
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print '/* Library functions. */';
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print '';
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while (<>) {
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chop; # strip record separator
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if (/^[^#]/) {
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&output($_);
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}
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}
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sub output {
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local($line) = @_;
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@line_fields = split(/\|/, $line, 9999);
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$retval = $line_fields[1];
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$feature = $line_fields[2];
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$param_def = $line_fields[4];
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$orig = $feature;
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$feature =~ s/^@//;
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$space = $feature;
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$space =~ s/./ /g;
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if ($retval eq 'retval') {
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$retval_param = '&retval';
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$call_prefix = '';
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$call_prefix_space = '';
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$prefix = 'retval = ';
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$prefix_space = ' ';
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$retval = 'int';
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}
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elsif ($retval !~ /^void$/) {
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$retval_param = 'NULL';
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$prefix = 'retval = ';
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$prefix_space = ' ';
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$call_prefix = 'retval = ';
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$call_prefix_space = ' ';
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}
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else {
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$retval_param = 'NULL';
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$call_prefix = '';
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$call_prefix_space = '';
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$prefix = '';
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$prefix_space = '';
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}
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$check_server_code = "\n";
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$check_server_code .=
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"\t/* If neccessary, we ask the server for the requested\n" .
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"\t * feature. If not, we call the sysdeps function. */\n\n" .
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"\tif ((server->flags & _GLIBTOP_INIT_STATE_SERVER) &&\n" .
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"\t (server->features & (1 << GLIBTOP_SYSDEPS_" .
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&toupper($feature) . ")))\n" .
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"\t\tgoto call_server;\n\telse\n" .
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"\t\tgoto call_sysdeps;\n\n";
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$need_temp_storage = $always_use_temp_storage;
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$size_code = "\t_LIBGTOP_SEND_len = 0;\n";
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$marshal_code = "\t_LIBGTOP_SEND_offset = 0;\n";
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$marshal_code .= "\tmemset (_LIBGTOP_SEND_buf, 0, _LIBGTOP_SEND_len);\n";
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$first_param_name = '';
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$call_param = '';
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$param_decl = '';
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$need_temp_len = 0;
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$nr_params = (@params = split(/:/, $param_def, 9999));
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for ($param = 1; $param <= $nr_params; $param++) {
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$list = $params[$param];
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$type = $params[$param];
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$type =~ s/\(.*//;
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$list =~ s/^.*\(//;
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$list =~ s/\)$//;
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$count = (@fields = split(/,/, $list, 9999));
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for ($field = 1; $field <= $count; $field++) {
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my $c_type = $typeinfo->{$type}->[1];
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if ($first_param_name eq '') {
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$first_param_name = $fields[$field];
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}
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if ($typeinfo->{$type}->[2]) {
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$need_temp_storage = 1;
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}
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if ($param_decl eq '') {
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$param_decl = ",\n " . $space . ' ';
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}
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else {
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$param_decl = $param_decl . ', ';
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}
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$param_decl = $param_decl . $c_type . ' ' . $fields[$field];
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$call_param = $call_param . ', ' . $fields[$field];
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$size_code .= "\t_LIBGTOP_SEND_len += ";
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if (defined $sizeof_funcs->{$type}) {
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$size_code .= $sizeof_funcs->{$type}->($fields[$field]);
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} else {
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$size_code .= sprintf ("sizeof (%s)", $c_type);
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}
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$size_code .= ";\n";
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$marshal_code .= "\t_LIBGTOP_SEND_ptr = ".
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"(char *) _LIBGTOP_SEND_buf + _LIBGTOP_SEND_offset;\n";
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if (defined $marshal_funcs->{$type}) {
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$marshal_code .= $marshal_funcs->{$type}->($c_type, $fields[$field], "\t");
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} else {
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$marshal_code .= sprintf ("\tmemcpy (_LIBGTOP_SEND_ptr, %s, %s);\n",
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'&'.$fields[$field], "sizeof ($c_type)");
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}
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$marshal_code .= "\t_LIBGTOP_SEND_offset += ";
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if (defined $sizeof_funcs->{$type}) {
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$marshal_code .= $sizeof_funcs->{$type}->($fields[$field]);
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} else {
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$marshal_code .= sprintf ("sizeof (%s)", $c_type);
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}
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$marshal_code .= ";\n";
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}
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}
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$local_var_code = "";
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$local_var_code .= "\tunsigned _LIBGTOP_SEND_offset, _LIBGTOP_SEND_len;\n";
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if ($need_temp_len) {
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$local_var_code .= "\tunsigned _LIBGTOP_SEND_temp_len;\n";
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}
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$local_var_code .= "\tvoid *_LIBGTOP_SEND_buf;\n";
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$local_var_code .= "\tchar *_LIBGTOP_SEND_ptr;\n";
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if ($retval !~ /^void$/) {
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$local_var_code .= sprintf ("\t%s retval = (%s) 0;\n",
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$retval, $retval);
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}
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$sysdeps_code = "call_sysdeps:\n";
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if ($orig !~ /^@/) {
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$sysdeps_code .= sprintf ("#if (!GLIBTOP_SUID_%s)\n", &toupper($feature));
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}
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if ($line_fields[3] eq '') {
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$sysdeps_code .= sprintf ("\t%sglibtop_get_%s_s (server%s);\n",
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$prefix, $feature, $call_param);
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} else {
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$sysdeps_code .= sprintf ("\t%sglibtop_get_%s_s (server, buf%s);\n",
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$prefix, $feature, $call_param);
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}
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$sysdeps_code .= "\tgoto check_missing;\n";
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if ($orig !~ /^@/) {
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$sysdeps_code .= "#else\n\terrno = ENOSYS;\n";
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$sysdeps_code .= sprintf ("\tglibtop_error_io_r (server, \"%s\");\n",
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"glibtop_get_" . $feature);
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$sysdeps_code .= "\tgoto do_return;\n";
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$sysdeps_code .= "#endif\n";
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}
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$total_code = sprintf ("%s%s%s\n", $init_code, $check_server_code,
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$sysdeps_code);
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$send_buf_code = "\t_LIBGTOP_SEND_buf = ";
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if ($need_temp_storage) {
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$send_buf_code .= "glibtop_malloc_r (server, _LIBGTOP_SEND_len+1)";
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} else {
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$send_buf_code .= '(void *) &'.$first_param_name;
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}
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$send_buf_code .= ";\n";
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$call_code = '';
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$call_code .= sprintf ("\t%sglibtop_call_l (server, GLIBTOP_CMND_%s,\n",
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$call_prefix, &toupper($feature));
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$call_code .= sprintf ("\t\t\t%s%s, %s,\n", $call_prefix_space,
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"_LIBGTOP_SEND_len", "_LIBGTOP_SEND_ptr");
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if ($line_fields[3] eq '') {
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$call_code .= sprintf ("\t\t\t%s0, NULL,\n", $call_prefix_space);
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} else {
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$call_code .= sprintf ("\t\t\t%ssizeof (glibtop_%s), buf,\n",
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$call_prefix_space, $feature);
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}
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$call_code .= sprintf ("\t\t\t%s%s);\n", $call_prefix_space, $retval_param);
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if ($need_temp_storage) {
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$send_buf_free_code = "\tglibtop_free_r (server, _LIBGTOP_SEND_buf);\n";
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} else {
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$send_buf_free_code = "";
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}
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$total_code .= sprintf ("call_server:\n%s\n%s\n%s\n%s\n%s\n",
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$size_code, $send_buf_code, $marshal_code,
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$call_code, $send_buf_free_code);
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$total_code .= "\tgoto check_missing;\n\n";
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$check_code = "check_missing:\n";
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$check_code .= "\t/* Make sure that all required fields are present. */\n";
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if (!($line_fields[3] eq '')) {
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$check_code .= "\tif (buf->flags & server->required." . $feature . ")\n";
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$check_code .= "\t\t_glibtop_missing_feature (server, \"" . $feature .
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"\", buf->flags,\n\t\t\t\t\t &server->required." . $feature . ");\n";
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}
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$total_code .= $check_code."\tgoto do_return;\n\n";
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$return_code = "do_return:\n";
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if ($retval !~ /^void$/) {
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$return_code .= "\treturn retval;\n";
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} else {
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$return_code .= "\treturn;\n";
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}
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$total_code .= $return_code;
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$func_decl = $retval."\n";
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if ($line_fields[3] eq '') {
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$func_decl .= sprintf ("glibtop_get_%s_l (glibtop *server%s)\n",
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$feature, $param_decl);
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} else {
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$func_decl .= sprintf ("glibtop_get_%s_l (glibtop *server, %s *buf%s)\n",
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$feature, 'glibtop_'.$feature, $param_decl);
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}
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$init_code = sprintf ("\tglibtop_init_r (&server, (1 << %s), 0);\n",
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"GLIBTOP_SYSDEPS_".&toupper($feature));
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$total_code = sprintf ("%s{\n%s\n%s\n%s}\n", $func_decl,
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$local_var_code, $total_code);
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print $total_code;
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}
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