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#!/usr/bin/perl -w

#

#  Copyright (c) 2003-2004, Artem B. Bityuckiy, SoftMine Corporation.

#

#  Redistribution and use in source and binary forms, with or without

#  modification, are permitted provided that the following conditions

#  are met:

#  1. Redistributions of source code must retain the above copyright

#     notice, this list of conditions and the following disclaimer.

#  2. Redistributions in binary form must reproduce the above copyright

#     notice, this list of conditions and the following disclaimer in the

#     documentation and/or other materials provided with the distribution.

#

#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND

#  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

#  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

#  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE

#  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

#  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

#  OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

#  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

#  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

#  OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

#  SUCH DAMAGE.

#

use integer;

use Getopt::Std;

use strict;

sub err($);

sub process_section_encodings($);

sub process_section_cesdeps($);

sub next_entry($$$);

sub generate_cesbi_h($$);

sub generate_encnames_h(@);

sub generate_aliasesbi_c($);

sub generate_encoding_aliases_c($);

sub generate_cesdeps_h($);

sub generate_ccsbi_h($);

sub generate_cesbi_c($);

sub generate_ccsnames_h($);

# ==============================================================================

#

# GLOBAL VARIABLES

#

# ==============================================================================

my $comment_automatic =

"/*

 * This file was automatically generated mkdeps.pl script. Don't edit.

 */";

my $macro_from_enc     = '_ICONV_FROM_ENCODING_';

my $macro_to_enc       = '_ICONV_TO_ENCODING_';

my $macro_from_ucs_ces = 'ICONV_FROM_UCS_CES_';

my $macro_to_ucs_ces   = 'ICONV_TO_UCS_CES_';

my $macro_from_ucs_ccs = 'ICONV_FROM_UCS_CCS_';

my $macro_to_ucs_ccs   = 'ICONV_TO_UCS_CCS_';

my $macro_enc_name     = 'ICONV_ENCODING_';

my $macro_ccs_name     = 'ICONV_CCS_';

my $var_from_ucs_handlers = '_iconv_from_ucs_ces_handlers_';

my $var_to_ucs_handlers   = '_iconv_to_ucs_ces_handlers_';

my $var_ccs       = '_iconv_ccs_';

my $var_aliases   = '_iconv_aliases';

my $var_ces_names = 'iconv_ces_names_';

# ==============================================================================

#

# PARSE COMMAND-LINE OPTIONS.

#

# ==============================================================================

my %options;

# SUPPORTED OPTIONS.

my $help_opt    = 'h';

my $infile_opt  = 'i';

my $verbose_opt = 'v';

# Default input configuration file name

my $default_infile = '../lib/encoding.deps';

# Real input configuration file name

my $infile;

# Verbose flag (be verbose if not zero)

my $verbose;

{

getopts ("${help_opt}${verbose_opt}${infile_opt}:", \%options)

or err "getopts() failed: $!.";

if ($options{$help_opt})

{

  # Output help message and exit.

  print "Usage: $0 [-$infile_opt depfile] [-$help_opt]\n";

  print "\t-$infile_opt - input file with configuration ($default_infile ";

  print "file will be used by default)\n";

  print "\t-$help_opt - this help message\n";

  exit 0;

}

# Input file name.

$infile = $options{$infile_opt} ? $options{$infile_opt} : $default_infile;

$verbose = $options{$verbose_opt} ? 1 : 0;

print "Debug: -$verbose_opt option found.\n" if $verbose;

# ==============================================================================

#

# Find and fetch sections from input file

#

# ==============================================================================

# Opening input file

print "Debug: open \"$infile\" input file.\n" if $verbose;

open (INFILE, '<', $infile) or err "Can't open \"$infile\" file for reading.\n"

                                 . "System error message: $!.\n";

# Configuration file markers

my $marker_section = 'SECTION';

my $marker_section_end = 'SECTION END';

# File sections. Hash values are references to arrays with section contents

my %sections;

# Extract sections from file

for (my $ln = 1; my $l = <INFILE>; $ln += 1)

{

  # Skip comments and empty lines

  next if $l =~ m/^#.*$/ or $l =~ m/^\s*$/;

  # Remove last CR symbol

  $l =~ s/^(.*)\n$/$1/, $l =~ s/^(.*)\r$/$1/;

  # Generate error if line isn't section begin marker

  err "(input file line $ln) Unexpected marker: \"$l\". ${marker_section} "

    . "is expected."

  if $l !~ m/^$marker_section(\s+(\S*)\s*)?$/;

  # Generate error if there is no section name

  err "(input file line $ln) Section name isn't found"

  if !$1 or !$2;

  # Generate error if this is section end marker

  err "(input file line $ln) Unexpected \"${marker_section_end}\" marker "

    . "in input file."

  if $2 eq $marker_section_end;

  my $sect_name = $2;

  # Extract section content

  for (; $l = <INFILE>; $ln += 1)

  {

    # Skip comments and empty lines

    next if $l =~ m/^#.*$/ or $l =~ m/^$/;

    # Remove last CR symbol

    $l =~ s/^(.*)\n$/$1/, $l =~ s/^(.*)\r$/$1/;

    last if $l =~ m/^$marker_section_end$/;

    push @{$sections{$sect_name}}, $l;

  }

  # Generate error if section wasn't ended

  err "(input file line $ln) \"No $marker_section_end\" marker found"

  if $l !~ m/^$marker_section_end$/;

}

close INFILE or err "Error while closing input file.";

# =============================================================================

#

# Now sections are fetched. Each section is processed by separate function.

# There are only three supported sections now: ENCODINGS, CES_DEPENDENCIES

# and ENCODING_CCS_DEPENDENCIES.

#

# =============================================================================

my $section_encodings = 'ENCODINGS';

my $section_cesdeps   = 'CES_DEPENDENCIES';

my $section;

err "$section_encodings not found."

if !defined $sections{$section_encodings};

err "$section_cesdeps not found."

if !defined $sections{$section_cesdeps};

# Process sections

print "Debug: process $section_encodings section.\n" if $verbose;

process_section_encodings ($sections{$section_encodings});

delete $sections{$section_encodings};

print "Debug: process $section_cesdeps section.\n" if $verbose;

process_section_cesdeps ($sections{$section_cesdeps});

delete $sections{$section_cesdeps};

print STDERR "Warning: section \"$_\" was ignored!\n"

foreach (keys %sections);

exit 1;

}

# =============================================================================

#

# Print error message and exit.

#

# Parameter 1: error message.

#

# =============================================================================

sub err($)

{

  print STDERR "Error while running script.\n$_[0]\n";

  exit 0;

}

# =============================================================================

#

# Process ENCODINGS section.

#

# Parameter 1 (input):  array reference with section content;

#

# =============================================================================

sub process_section_encodings($)

{

  my $sect = $_[0];

  my $lineidx = 0;

  my @entry;

  my $marker_encoding = 'ENCODING';

  my $marker_ces      = 'CES';

  my $marker_ccs      = 'CCS';

  my $marker_aliases  = 'ALIASES';

  # Keys: CES names. Values: array reference with encodings list.

  my %cesenc;

  # Keys: encodings. Values: CES converter names.

  my %encces;

  # Keys: CCS tables names. Values: array reference with encodings.

  my %ccsenc;

  # Keys: encodings. Values: aliases list.

  my %encalias;

  while (next_entry ($sect, \@entry, \$lineidx))

  {

    my $encoding;

    my $ces;

    my $ccs;

    my $aliases;

    foreach my $l (@entry)

    {

      if ($l =~ m/^($marker_encoding):\s*(\S*)\s*$/)

      {

        err "(process_section_encodings()) More than one $marker_encoding "

          . "records found ($l)"

        if defined $encoding;

        $encoding = $2;

      }

      elsif ($l =~ m/^($marker_ces):\s*(\S*)\s*$/)

      {

        err "(process_section_encodings()) More than one $marker_ces "

          . "records found ($l)"

        if defined $ces;

        $ces = $2;

      }

      elsif ($l =~ m/^($marker_aliases):\s*(.*)\s*$/)

      {

        err "(process_section_encodings()) More than one "

          . "$marker_aliases records found ($l)"

        if defined $aliases;

        $aliases = $2;

      }

      elsif ($l =~ m/^($marker_ccs):\s*(.*)\s*$/)

      {

        err "(process_section_encodings()) More than one "

          . "$marker_ccs records found ($l)"

        if defined $ccs;

        $ccs = $2;

      }

      else

      {

        err "(process_section_encodings()) Can't parse \"$l\"";

      }

    }

    err "(process_section_encodings()) $encoding is defined twice"

    if (defined $encces{$encoding});

    err "(process_section_encodings()) ENCODING: field isn't found"

    if not defined $encoding;

    if (defined $ces)

    {

      push @{$cesenc{$ces}}, $encoding;

      $encces{$encoding} = $ces;

    }

    if (defined $ccs)

    {

      my @ccs = split / /, $ccs;

      push @{$ccsenc{$_}}, $encoding foreach (@ccs);

    }

    $encalias{$encoding} = $aliases;

  }

  # Generate cesbi.h header file

  generate_cesbi_h (\%cesenc, \%encces);

  # Generate encnames.h header file

  generate_encnames_h (keys %encces);

  # Generate aliasesbi.c file

  generate_aliasesbi_c (\%encalias);

  # Generate encoding.aliases file

  generate_encoding_aliases (\%encalias);

  # Generate ccsbi.h header file

  generate_ccsbi_h (\%ccsenc);

  # Generate cesbi.c file

  generate_cesbi_c (\%cesenc);

  # Generate ccsbi.c file

  my @ccs = keys %ccsenc;

  generate_ccsbi_c (\@ccs);

  # Generate ccsnames.h header file

  generate_ccsnames_h (\%ccsenc);

}

# ==============================================================================

#

# Process CES_DEPENDENCIES section.

#

# Parameter 1: array reference with section content.

#

# ==============================================================================

sub process_section_cesdeps($)

{

  my $sect = $_[0];

  my $lineidx = 0;

  my @entry;

  my $marker_ces      = 'CES';

  my $marker_used_ces = 'USED_CES';

  my %cesdeps;

  while (next_entry ($sect, \@entry, \$lineidx))

  {

    my $ces;

    my $used_ces;

    foreach my $l (@entry)

    {

      if ($l =~ m/^($marker_ces):\s*(\S*)\s*$/)

      {

        err "(process_section_cesdeps()) More than one $marker_ces "

          . "records found ($l)"

        if $ces;

        $ces = $2;

      }

      elsif ($l =~ m/^($marker_used_ces):\s*(.*)\s*$/)

      {

        err "(process_section_cesdeps()) More than one $marker_used_ces "

          . "records found ($l)"

        if $used_ces;

        $used_ces = $2;

      }

      else

      {

        err "(process_section_cesdeps()) Can't parse \"$l\"";

      }

    }

    err "(process_section_esdeps()) $ces dependecties are defined twice"

    if (defined $cesdeps{$ces});

    # Split string

    my @used_ces = split / /, $used_ces;

    $cesdeps{$ces} = \@used_ces;

  }

  # Generate cesdeps.h header file

  generate_cesdeps_h (\%cesdeps);

}

# ==============================================================================

#

# Extract next entry.

#

# Parameter 1 (input): array reference with entries;

# Parameter 2 (output): array reference with entry content;

# Parameter 3 (input/output): scalar reference with line index to process.

#

# Returns 1 is entry was found, 0 if thee is no more entries;

#

# ==============================================================================

sub next_entry($$$)

{

  my $entries = $_[0];

  my $entry   = $_[1];

  my $idx     = $_[2];

  my $marker_entry = 'ENTRY';

  my $marker_entry_end = 'ENTRY END';

  my $entry_flag = 0;

  return 0 if not defined ${$entries}[${$idx}];

  undef @{$entry};

  for (; my $l = ${$entries}[${$idx}++];)

  {

    # Skip comments and empty lines

    next if $l =~ m/^#.*$/ or $l =~ m/^\s*$/;

    if ($l =~ m/^$marker_entry$/)

    {

      err "(next_entry()) $marker_entry marker appears twice"

      if ($entry_flag == 1);

      $entry_flag = 1;

      $l = ${$entries}[${$idx}++]

    }

    else

    {

      # Generate error if line isn't entry begin marker

      err "(next_entry()) Unexpected marker: \"$l\". ${marker_entry} "

        . "is expected."

      if ($entry_flag == 0)

    }

    last if $l =~ m/^$marker_entry_end$/;

    push @{$entry}, $l;

  }

  return 1;

}

# ==============================================================================

#

# Generate cesbi.h file.

#

# Parameter 1 (input): hash reference with keys = CES Converters names and

# values = array references with list of supported encodings.

# Parameter 2 (input): hash reference with keys = encodings names and

# values = CES converter names.

#

# ==============================================================================

sub generate_cesbi_h($$)

{

  my %cesenc = %{$_[0]};

  my %encces = %{$_[1]};

  my @ces = sort keys %cesenc;

  print "Debug: create \"cesbi.h\" file.\n" if $verbose;

  open (CESBI_H, '>', "cesbi.h")

  or err "Can't create \"cesbi.h\" file for writing.\nSystem error message: $!.\n";

  print CESBI_H "$comment_automatic\n\n";

  print CESBI_H "#ifndef __CESBI_H__\n";

  print CESBI_H "#define __CESBI_H__\n\n";

  print CESBI_H "#include <newlib.h>\n";

  print CESBI_H "#include <_ansi.h>\n";

  print CESBI_H "#include \"../lib/encnames.h\"\n";

  print CESBI_H "#include \"../lib/ucsconv.h\"\n\n";

  print CESBI_H "/*\n";

  print CESBI_H " * Enable CES converter if correspondent encoding is requested.\n";

  print CESBI_H " * Defining ${macro_to_ucs_ces}XXX macro or ${macro_from_ucs_ces}XXX\n";

  print CESBI_H " * macro is needed to enable \"XXX encoding -> UCS\" or \"UCS -> XXX encoding\"\n";

  print CESBI_H " * part of UCS-based CES converter.\n";

  print CESBI_H " */\n";

  foreach my $ces (@ces)

  {

    my @encs = sort @{$cesenc{$ces}};

    foreach my $encoding (@encs)

    {

      print CESBI_H $encoding eq $encs[0] ? "#if " : " || ";

      print CESBI_H "defined ($macro_from_enc\U$encoding)";

      print CESBI_H " \\" if $encoding ne $encs[$#encs];

      print CESBI_H "\n";

    }

    print CESBI_H "#  define $macro_to_ucs_ces\U$ces\n";

    print CESBI_H "#endif\n";

    foreach my $encoding (@encs)

    {

      print CESBI_H $encoding eq $encs[0] ? "#if " : " || ";

      print CESBI_H "defined ($macro_to_enc\U$encoding)";

      print CESBI_H " \\" if $encoding ne $encs[$#encs];

      print CESBI_H "\n";

    }

    print CESBI_H "#  define $macro_from_ucs_ces\U$ces\n";

    print CESBI_H "#endif\n\n";

  }

  print CESBI_H "/*\n";

  print CESBI_H " * Some encodings require another encodings to be enabled.\n";

  print CESBI_H " * These dependencies are handled in cesdeps.h header file.\n";

  print CESBI_H " */\n";

  print CESBI_H "#include \"cesdeps.h\"\n\n";

  print CESBI_H "/*\n";

  print CESBI_H " * NLS uses iconv's capabilities and require one of encodings\n";

  print CESBI_H " * to be enabled for internal wchar_t representation.\n";

  print CESBI_H " */\n";

  print CESBI_H "#include \"../lib/iconvnls.h\"\n\n";

  print CESBI_H "/*\n";

  print CESBI_H " * Forward declarations of CES converter handlers.\n";

  print CESBI_H " * These handlers are actually defined in correspondent CES converter files.\n";

  print CESBI_H " */\n";

  foreach my $ces (@ces)

  {

    print CESBI_H "#ifdef $macro_to_ucs_ces\U$ces\n";

    print CESBI_H "extern _CONST iconv_to_ucs_ces_handlers_t\n";

    print CESBI_H "$var_to_ucs_handlers$ces;\n";

    print CESBI_H "#endif\n";

    print CESBI_H "#ifdef $macro_from_ucs_ces\U$ces\n";

    print CESBI_H "extern _CONST iconv_from_ucs_ces_handlers_t\n";

    print CESBI_H "$var_from_ucs_handlers$ces;\n";

    print CESBI_H "#endif\n\n";

  }

  print CESBI_H "#endif /* !__CESBI_H__ */\n\n";

  close CESBI_H or err "Error while closing cesbi.h file.";

}

# ==============================================================================

#

# Generate encnames.h header file.

#

# Parameters: array of supported encodings.

#

# ==============================================================================

sub generate_encnames_h(@)

{

  print "Debug: create \"../lib/encnames.h\" file.\n" if $verbose;

  open (ENCNAMES_H, '>', "../lib/encnames.h")

  or err "Can't create \"../lib/encnames.h\" file for writing.\nSystem error message: $!.\n";

  print ENCNAMES_H "$comment_automatic\n\n";

  print ENCNAMES_H "#ifndef __ENCNAMES_H__\n";

  print ENCNAMES_H "#define __ENCNAMES_H__\n\n";

  print ENCNAMES_H "/*\n";

  print ENCNAMES_H " * Encodings name macros.\n";

  print ENCNAMES_H " */\n";

  foreach my $enc (sort @_)

  {

    print ENCNAMES_H "#define $macro_enc_name\U$enc\E \"$enc\"\n";

  }

  print ENCNAMES_H "\n#endif /* !__ENCNAMES_H__ */\n\n";

  close ENCNAMES_H or err "Error while closing ../lib/encnames.h file.";

}

# ==============================================================================

#

# Generate aliasesbi.c C source file.

#

# Parameters: hash reference with keys = encodings and values = aliases string.

#

# ==============================================================================

sub generate_aliasesbi_c($)

{

  print "Debug: create \"../lib/aliasesbi.c\" file.\n" if $verbose;

  open (ALIASESBI_C, '>', "../lib/aliasesbi.c")

  or err "Can't create \"../lib/aliasesbi.c\" file for writing.\nSystem error message: $!.\n";

  print ALIASESBI_C "$comment_automatic\n\n";

  print ALIASESBI_C "#include <_ansi.h>\n";

  print ALIASESBI_C "#include \"encnames.h\"\n\n";

  print ALIASESBI_C "_CONST char *\n";

  print ALIASESBI_C "$var_aliases =\n";

  print ALIASESBI_C "{\n";

  foreach my $enc (sort keys %{$_[0]})

  {

    print ALIASESBI_C "#if defined ($macro_from_enc\U$enc) \\\n";

    print ALIASESBI_C " || defined ($macro_to_enc\U$enc)\n";

    print ALIASESBI_C "  $macro_enc_name\U$enc\E";

    print ALIASESBI_C " \" ${$_[0]}{$enc}\\n\"" if defined ${$_[0]}{$enc};

    print ALIASESBI_C "\n";

    print ALIASESBI_C "#endif\n";

  }

  print ALIASESBI_C "  \"\"\n";

  print ALIASESBI_C "};\n\n";

  close ALIASESBI_C or err "Error while closing ../lib/aliasesbi.c file.";

}

# ==============================================================================

#

# Generate encoding.aliases file.

#

# Parameter 1: hash reference with keys = encodings and values = aliases string.

#

# ==============================================================================

sub generate_encoding_aliases($)

{

  print "Debug: create \"../encoding.aliases\" file.\n" if $verbose;

  open (ALIASES, '>', "../encoding.aliases")

  or err "Can't create \"../encoding.aliases\" file for writing.\nSystem error message: $!.\n";

  print ALIASES "#\n# This file was automatically generated. Don't edit.\n#\n\n";

  foreach my $enc (sort keys %{$_[0]})

  {

    print ALIASES "$enc";

    print ALIASES " ${$_[0]}{$enc}" if defined ${$_[0]}{$enc};

    print ALIASES "\n";

  }

  print ALIASES "\n";

  close ALIASES or err "Error while closing ./encoding.aliases file.";

}

# ==============================================================================

#

# Generate cesdeps.h header file.

#

# Parameter 1: hash reference with keys = CES converters and values = references

# to arrays with list of CES converters which are needed by that CES converter

# (defined by key).

#

# ==============================================================================

sub generate_cesdeps_h($)

{

  my %cesdeps = %{$_[0]};

  print "Debug: create \"cesdeps.h\" file.\n" if $verbose;

  open (CESDEPS_H, '>', "cesdeps.h")

  or err "Can't create \"cesdeps.h\" file for writing.\nSystem error message: $!.\n";