+++ /dev/null
-use strict;
-use warnings 'all';
-
-use Getopt::Long;
-
-# Parse command line.
-our ($default_output_file) = $0;
-$default_output_file =~ s/\.pl//;
-our ($input_file);
-our ($output_file);
-parse_cmd_line ();
-
-# Initialize type system.
-our (%type, @types);
-init_all_types ();
-
-# Parse input file.
-our (%ops);
-our (@funcs, @opers);
-parse_input ();
-
-# Command line.
-
-# Parses the command line.
-#
-# Initializes $input_file, $output_file.
-sub parse_cmd_line {
- GetOptions ("i|input=s" => \$input_file,
- "o|output=s" => \$output_file,
- "h|help" => sub { usage (); })
- or exit 1;
-
- $input_file = "operations.def" if !defined $input_file;
- $output_file = $default_output_file if !defined $output_file;
-
- open (INPUT, "<$input_file") or die "$input_file: open: $!\n";
- open (OUTPUT, ">$output_file") or die "$output_file: create: $!\n";
-
- select (OUTPUT);
-}
-
-sub usage {
- print <<EOF;
-$0, for generating $default_output_file from definitions
-usage: generate.pl [-i INPUT] [-o OUTPUT] [-h]
- -i INPUT input file containing definitions (default: operations.def)
- -o OUTPUT output file (default: $default_output_file)
- -h display this help message
-EOF
- exit (0);
-}
-
-our ($token);
-our ($toktype);
-\f
-# Types.
-
-# Defines all our types.
-#
-# Initializes %type, @types.
-sub init_all_types {
- # Common user-visible types used throughout evaluation trees.
- init_type ('number', 'any', C_TYPE => 'double',
- ATOM => 'number', MANGLE => 'n', HUMAN_NAME => 'num',
- STACK => 'ns', MISSING_VALUE => 'SYSMIS');
- init_type ('string', 'any', C_TYPE => 'struct fixed_string',
- ATOM => 'string', MANGLE => 's', HUMAN_NAME => 'string',
- STACK => 'ss', MISSING_VALUE => 'empty_string');
- init_type ('boolean', 'any', C_TYPE => 'double',
- ATOM => 'number', MANGLE => 'n', HUMAN_NAME => 'boolean',
- STACK => 'ns', MISSING_VALUE => 'SYSMIS');
-
- # Format types.
- init_type ('format', 'atom');
- init_type ('ni_format', 'leaf', C_TYPE => 'const struct fmt_spec *',
- ATOM => 'format', MANGLE => 'f',
- HUMAN_NAME => 'num_input_format');
- init_type ('no_format', 'leaf', C_TYPE => 'const struct fmt_spec *',
- ATOM => 'format', MANGLE => 'f',
- HUMAN_NAME => 'num_output_format');
-
- # Integer types.
- init_type ('integer', 'leaf', C_TYPE => 'int',
- ATOM => 'integer', MANGLE => 'n', HUMAN_NAME => 'integer');
- init_type ('pos_int', 'leaf', C_TYPE => 'int',
- ATOM => 'integer', MANGLE => 'n',
- HUMAN_NAME => 'positive_integer_constant');
-
- # Variable names.
- init_type ('variable', 'atom');
- init_type ('num_var', 'leaf', C_TYPE => 'const struct variable *',
- ATOM => 'variable', MANGLE => 'Vn',
- HUMAN_NAME => 'num_variable');
- init_type ('str_var', 'leaf', C_TYPE => 'const struct variable *',
- ATOM => 'variable', MANGLE => 'Vs',
- HUMAN_NAME => 'string_variable');
-
- # Vectors.
- init_type ('vector', 'leaf', C_TYPE => 'const struct vector *',
- ATOM => 'vector', MANGLE => 'v', HUMAN_NAME => 'vector');
-
- # Fixed types.
- init_type ('expression', 'fixed', C_TYPE => 'struct expression *',
- FIXED_VALUE => 'e');
- init_type ('case', 'fixed', C_TYPE => 'const struct ccase *',
- FIXED_VALUE => 'c');
- init_type ('case_idx', 'fixed', C_TYPE => 'size_t',
- FIXED_VALUE => 'case_idx');
-
- # One of these is emitted at the end of each expression as a sentinel
- # that tells expr_evaluate() to return the value on the stack.
- init_type ('return_number', 'atom');
- init_type ('return_string', 'atom');
-
- # Used only for debugging purposes.
- init_type ('operation', 'atom');
-}
-
-# init_type has 2 required arguments:
-#
-# NAME: Type name.
-#
-# `$name' is the type's name in operations.def.
-#
-# `OP_$name' is the terminal's type in operations.h.
-#
-# `expr_allocate_$name()' allocates a node of the given type.
-#
-# ROLE: How the type may be used:
-#
-# "any": Usable as operands and function arguments, and
-# function and operator results.
-#
-# "leaf": Usable as operands and function arguments, but
-# not function arguments or results. (Thus, they appear
-# only in leaf nodes in the parse type.)
-#
-# "fixed": Not allowed either as an operand or argument
-# type or a result type. Used only as auxiliary data.
-#
-# "atom": Not allowed anywhere; just adds the name to
-# the list of atoms.
-#
-# All types except those with "atom" as their role also require:
-#
-# C_TYPE: The C type that represents this abstract type.
-#
-# Types with "any" or "leaf" role require:
-#
-# ATOM:
-#
-# `$atom' is the `struct operation_data' member name.
-#
-# get_$atom_name() obtains the corresponding data from a
-# node.
-#
-# MANGLE: Short string for name mangling. Use identical strings
-# if two types should not be overloaded.
-#
-# HUMAN_NAME: Name for a type when we describe it to the user.
-#
-# Types with role "any" require:
-#
-# STACK: Name of the local variable in expr_evaluate(), used for
-# maintaining the stack for this type.
-#
-# MISSING_VALUE: Expression used for the missing value of this
-# type.
-#
-# Types with role "fixed" require:
-#
-# FIXED_VALUE: Expression used for the value of this type.
-sub init_type {
- my ($name, $role, %rest) = @_;
- my ($type) = $type{"\U$name"} = {NAME => $name, ROLE => $role, %rest};
-
- my (@need_keys) = qw (NAME ROLE);
- if ($role eq 'any') {
- push (@need_keys, qw (C_TYPE ATOM MANGLE HUMAN_NAME STACK MISSING_VALUE));
- } elsif ($role eq 'leaf') {
- push (@need_keys, qw (C_TYPE ATOM MANGLE HUMAN_NAME));
- } elsif ($role eq 'fixed') {
- push (@need_keys, qw (C_TYPE FIXED_VALUE));
- } elsif ($role eq 'atom') {
- } else {
- die "no role `$role'";
- }
-
- my (%have_keys);
- $have_keys{$_} = 1 foreach keys %$type;
- for my $key (@need_keys) {
- defined $type->{$key} or die "$name lacks $key";
- delete $have_keys{$key};
- }
- scalar (keys (%have_keys)) == 0
- or die "$name has superfluous key(s) " . join (', ', keys (%have_keys));
-
- push (@types, $type);
-}
-
-# c_type(type).
-#
-# Returns the C type of the given type as a string designed to be
-# prepended to a variable name to produce a declaration. (That won't
-# work in general but it works well enough for our types.)
-sub c_type {
- my ($type) = @_;
- my ($c_type) = $type->{C_TYPE};
- defined $c_type or die;
-
- # Append a space unless (typically) $c_type ends in `*'.
- $c_type .= ' ' if $c_type =~ /\w$/;
-
- return $c_type;
-}
-\f
-# Input parsing.
-
-# Parses the entire input.
-#
-# Initializes %ops, @funcs, @opers.
-sub parse_input {
- get_line ();
- get_token ();
- while ($toktype ne 'eof') {
- my (%op);
-
- $op{OPTIMIZABLE} = 1;
- $op{UNIMPLEMENTED} = 0;
- $op{EXTENSION} = 0;
- for (;;) {
- if (match ('extension')) {
- $op{EXTENSION} = 1;
- } elsif (match ('no_opt')) {
- $op{OPTIMIZABLE} = 0;
- } elsif (match ('absorb_miss')) {
- $op{ABSORB_MISS} = 1;
- } else {
- last;
- }
- }
-
- $op{RETURNS} = parse_type () || $type{NUMBER};
- die "$op{RETURNS} is not a valid return type"
- if !any ($op{RETURNS}, @type{qw (NUMBER STRING BOOLEAN)});
-
- $op{CATEGORY} = $token;
- if (!any ($op{CATEGORY}, qw (operator function))) {
- die "`operator' or `function' expected at `$token'";
- }
- get_token ();
-
- my ($name) = force ("id");
-
- die "function name may not contain underscore"
- if $op{CATEGORY} eq 'function' && $name =~ /_/;
- die "operator name may not contain period"
- if $op{CATEGORY} eq 'operator' && $name =~ /\./;
-
- if (my ($prefix, $suffix) = $name =~ /^(.*)\.(\d+)$/) {
- $name = $prefix;
- $op{MIN_VALID} = $suffix;
- $op{ABSORB_MISS} = 1;
- }
- $op{NAME} = $name;
-
- force_match ('(');
- @{$op{ARGS}} = ();
- while (!match (')')) {
- my ($arg) = parse_arg ();
- push (@{$op{ARGS}}, $arg);
- if (defined ($arg->{IDX})) {
- last if match (')');
- die "array must be last argument";
- }
- if (!match (',')) {
- force_match (')');
- last;
- }
- }
-
- for my $arg (@{$op{ARGS}}) {
- next if !defined $arg->{CONDITION};
- my ($any_arg) = join ('|', map ($_->{NAME}, @{$op{ARGS}}));
- $arg->{CONDITION} =~ s/\b($any_arg)\b/arg_$1/g;
- }
-
- my ($opname) = "OP_$op{NAME}";
- $opname =~ tr/./_/;
- if ($op{CATEGORY} eq 'function') {
- my ($mangle) = join ('', map ($_->{TYPE}{MANGLE}, @{$op{ARGS}}));
- $op{MANGLE} = $mangle;
- $opname .= "_$mangle";
- }
- $op{OPNAME} = $opname;
-
- if ($op{MIN_VALID}) {
- my ($array_arg) = array_arg (\%op);
- die "can't have minimum valid count without array arg"
- if !defined $array_arg;
- die "minimum valid count allowed only with double array"
- if $array_arg->{TYPE} ne $type{NUMBER};
- die "can't have minimum valid count if array has multiplication factor"
- if $array_arg->{TIMES} != 1;
- }
-
- while ($toktype eq 'id') {
- my ($type) = parse_type () or die "parse error";
- die "`$type->{NAME}' is not allowed as auxiliary data"
- unless $type->{ROLE} eq 'leaf' || $type->{ROLE} eq 'fixed';
- my ($name) = force ("id");
- push (@{$op{AUX}}, {TYPE => $type, NAME => $name});
- force_match (';');
- }
-
- if ($op{OPTIMIZABLE}) {
- die "random variate functions must be marked `no_opt'"
- if $op{NAME} =~ /^RV\./;
- for my $aux (@{$op{AUX}}) {
- if (any ($aux->{TYPE}, @type{qw (CASE CASE_IDX)})) {
- die "operators with $aux->{TYPE} aux data must be "
- . "marked `no_opt'";
- }
- }
- }
-
- if ($op{RETURNS} eq $type{STRING} && !defined ($op{ABSORB_MISS})) {
- my (@args);
- for my $arg (@{$op{ARGS}}) {
- if (any ($arg->{TYPE}, @type{qw (NUMBER BOOLEAN)})) {
- die "$op{NAME} returns string and has double or bool "
- . "argument, but is not marked ABSORB_MISS";
- }
- if (defined $arg->{CONDITION}) {
- die "$op{NAME} returns string but has argument with condition";
- }
- }
- }
-
- if ($toktype eq 'block') {
- $op{BLOCK} = force ('block');
- } elsif ($toktype eq 'expression') {
- if ($token eq 'unimplemented') {
- $op{UNIMPLEMENTED} = 1;
- } else {
- $op{EXPRESSION} = $token;
- }
- get_token ();
- } else {
- die "block or expression expected";
- }
-
- die "duplicate operation name $opname" if defined $ops{$opname};
- $ops{$opname} = \%op;
- if ($op{CATEGORY} eq 'function') {
- push (@funcs, $opname);
- } else {
- push (@opers, $opname);
- }
- }
- close(INPUT);
-
- @funcs = sort {$ops{$a}->{NAME} cmp $ops{$b}->{NAME}
- ||
- $ops{$a}->{OPNAME} cmp $ops{$b}->{OPNAME}}
- @funcs;
- @opers = sort {$ops{$a}->{NAME} cmp $ops{$b}->{NAME}} @opers;
- our (@order) = (@funcs, @opers);
-}
-
-# Reads the next token into $token, $toktype.
-sub get_token {
- our ($line);
- lookahead ();
- return if defined ($toktype) && $toktype eq 'eof';
- $toktype = 'id', return
- if ($token) = $line =~ /\G([a-zA-Z_][a-zA-Z_.0-9]*)/gc;
- $toktype = 'int', return if ($token) = $line =~ /\G[0-9]+/gc;
- $toktype = 'punct', $token = $1, return if $line =~ /\G([][(),*;.])/gc;
- if ($line =~ /\G=/gc) {
- $toktype = "expression";
- $line =~ /\G\s+/gc;
- $token = accumulate_balanced (';');
- } elsif ($line =~ /\G\{/gc) {
- $toktype = "block";
- $token = accumulate_balanced ('}');
- $token =~ s/^\n+//;
- } else {
- die "bad character `" . substr ($line, pos $line, 1) . "' in input";
- }
-}
-
-# Skip whitespace, then return the remainder of the line.
-sub lookahead {
- our ($line);
- die "unexpected end of file" if !defined ($line);
- for (;;) {
- $line =~ /\G\s+/gc;
- last if pos ($line) < length ($line);
- get_line ();
- $token = $toktype = 'eof', return if !defined ($line);
- }
- return substr ($line, pos ($line));
-}
-
-# accumulate_balanced($chars)
-#
-# Accumulates input until a character in $chars is encountered, except
-# that balanced pairs of (), [], or {} cause $chars to be ignored.
-#
-# Returns the input read.
-sub accumulate_balanced {
- my ($end) = @_;
- my ($s) = "";
- my ($nest) = 0;
- our ($line);
- for (;;) {
- my ($start) = pos ($line);
- if ($line =~ /\G([^][(){};,]*)([][(){};,])/gc) {
- $s .= substr ($line, $start, pos ($line) - $start - 1)
- if pos ($line) > $start;
- my ($last) = substr ($line, pos ($line) - 1, 1);
- if ($last =~ /[[({]/) {
- $nest++;
- $s .= $last;
- } elsif ($last =~ /[])}]/) {
- if ($nest > 0) {
- $nest--;
- $s .= $last;
- } elsif (index ($end, $last) >= 0) {
- return $s;
- } else {
- die "unbalanced parentheses";
- }
- } elsif (index ($end, $last) >= 0) {
- return $s if !$nest;
- $s .= $last;
- } else {
- $s .= $last;
- }
- } else {
- $s .= substr ($line, pos ($line)) . "\n";
- get_line ();
- }
- }
-}
-
-# Reads the next line from INPUT into $line.
-sub get_line {
- our ($line);
- $line = <INPUT>;
- if (defined ($line)) {
- chomp $line;
- $line =~ s%//.*%%;
- pos ($line) = 0;
- }
-}
-
-# If the current token is an identifier that names a type,
-# returns the type and skips to the next token.
-# Otherwise, returns undef.
-sub parse_type {
- if ($toktype eq 'id') {
- foreach my $type (values (%type)) {
- get_token (), return $type
- if defined ($type->{NAME}) && $type->{NAME} eq $token;
- }
- }
- return;
-}
-
-# force($type).
-#
-# Makes sure that $toktype equals $type, reads the next token, and
-# returns the previous $token.
-sub force {
- my ($type) = @_;
- die "parse error at `$token' expecting $type"
- if $type ne $toktype;
- my ($tok) = $token;
- get_token ();
- return $tok;
-}
-
-# force($tok).
-#
-# If $token equals $tok, reads the next token and returns true.
-# Otherwise, returns false.
-sub match {
- my ($tok) = @_;
- if ($token eq $tok) {
- get_token ();
- return 1;
- } else {
- return 0;
- }
-}
-
-# force_match($tok).
-#
-# If $token equals $tok, reads the next token.
-# Otherwise, flags an error in the input.
-sub force_match {
- my ($tok) = @_;
- die "parse error at `$token' expecting `$tok'" if !match ($tok);
-}
-
-# Parses and returns a function argument.
-sub parse_arg {
- my (%arg);
- $arg{TYPE} = parse_type () || $type{NUMBER};
- die "argument name expected at `$token'" if $toktype ne 'id';
- $arg{NAME} = $token;
-
- if (lookahead () =~ /^[[,)]/) {
- get_token ();
- if (match ('[')) {
- die "only double and string arrays supported"
- if !any ($arg{TYPE}, @type{qw (NUMBER STRING)});
- $arg{IDX} = force ('id');
- if (match ('*')) {
- $arg{TIMES} = force ('int');
- die "multiplication factor must be positive"
- if $arg{TIMES} < 1;
- } else {
- $arg{TIMES} = 1;
- }
- force_match (']');
- }
- } else {
- $arg{CONDITION} = $arg{NAME} . ' ' . accumulate_balanced (',)');
- our ($line);
- pos ($line) -= 1;
- get_token ();
- }
- return \%arg;
-}
-\f
-# Output.
-
-# Prints the output file header.
-sub print_header {
- print <<EOF;
-/* $output_file
- Generated from $input_file by generate.pl.
- Do not modify! */
-
-EOF
-}
-
-# Prints the output file trailer.
-sub print_trailer {
- print <<EOF;
-
-/*
- Local Variables:
- mode: c
- buffer-read-only: t
- End:
-*/
-EOF
-}
-\f
-# Utilities.
-
-# any($target, @list)
-#
-# Returns true if $target appears in @list,
-# false otherwise.
-sub any {
- $_ eq $_[0] and return 1 foreach @_[1...$#_];
- return 0;
-}
-
-# make_sysmis_decl($op, $min_valid_src)
-#
-# Returns a declaration for a boolean variable called `force_sysmis',
-# which will be true when operation $op should be system-missing.
-# Returns undef if there are no such circumstances.
-#
-# If $op has a minimum number of valid arguments, $min_valid_src
-# should be an an expression that evaluates to the minimum number of
-# valid arguments for $op.
-sub make_sysmis_decl {
- my ($op, $min_valid_src) = @_;
- my (@sysmis_cond);
- if (!$op->{ABSORB_MISS}) {
- for my $arg (@{$op->{ARGS}}) {
- my ($arg_name) = "arg_$arg->{NAME}";
- if (!defined $arg->{IDX}) {
- if (any ($arg->{TYPE}, @type{qw (NUMBER BOOLEAN)})) {
- push (@sysmis_cond, "!is_valid ($arg_name)");
- }
- } elsif ($arg->{TYPE} eq $type{NUMBER}) {
- my ($a) = "$arg_name";
- my ($n) = "arg_$arg->{IDX}";
- push (@sysmis_cond, "count_valid ($a, $n) < $n");
- }
- }
- } elsif (defined $op->{MIN_VALID}) {
- my ($args) = $op->{ARGS};
- my ($arg) = ${$args}[$#{$args}];
- my ($a) = "arg_$arg->{NAME}";
- my ($n) = "arg_$arg->{IDX}";
- push (@sysmis_cond, "count_valid ($a, $n) < $min_valid_src");
- }
- for my $arg (@{$op->{ARGS}}) {
- push (@sysmis_cond, "!($arg->{CONDITION})")
- if defined $arg->{CONDITION};
- }
- return "bool force_sysmis = " . join (' || ', @sysmis_cond)
- if @sysmis_cond;
- return;
-}
-
-# array_arg($op)
-#
-# If $op has an array argument, return it.
-# Otherwise, returns undef.
-sub array_arg {
- my ($op) = @_;
- my ($args) = $op->{ARGS};
- return if !@$args;
- my ($last_arg) = $args->[@$args - 1];
- return $last_arg if defined $last_arg->{IDX};
- return;
-}
projects / pspp-builds.git / commitdiff