#!/usr/bin/perl -w

use strict;

while($#ARGV >= 0) {
  my %FP;
  my $file = shift @ARGV;

  local $/ = undef;

  open(FP, $file) || die "can't read $file";
  print "checking $file...\n";
  binmode FP;
  my $buf = <FP>;
  close FP;

  print "file named incorrectly; use *.h: $file\n" if $file =~ /\.(hpp|H|hh)$/;
  print "file named incorrectly; use *.cpp: $file\n" if $file =~ /\.(C|cc)$/;
  if($file =~ /\.(h|hpp|H)$/) {
    check_as_header($buf);
  } elsif($file =~ /\.(h|cpp|C)$/) {
    check_as_source($buf);
  } else {
    die "$file not checked (unknown type of file)";
  }
  open(FP, "cpp -nostdinc \"$file\" 2>/dev/null |") || die "can't cpp $file";
  binmode FP;
  $buf = <FP>;
  close FP;

  if($file =~ /\.(h|hpp|H)$/) {
    check_as_header_cpp($buf);
  } elsif($file =~ /\.(h|cpp|C)$/) {
    check_as_source_cpp($buf);
  } else {
    die "$file not checked (unknown type of file)";
  }
}

sub check_as_any {
  my($buf) = @_;

  print "no file head comment\n" unless $buf =~ m,^/*\*\*\*,;
}

sub check_as_header {
  my($buf) = @_;
  check_as_any($buf);
}

sub check_as_source {
  my($buf) = @_;
  check_as_any($buf);
}

sub check_as_any_cpp {
  my($buf) = @_;

  print "need space between tokens ) and {\n" if $buf =~ /\)\{/;
  print "need space between tokens 'const' and {\n" if $buf =~ /\bconst\{/;
  print "need space between tokens ) and 'const'\n" if $buf =~ /\)const\b/;
  print "need space between tokens 'template' and <\n" if $buf =~ /\btemplate</;
  print "need space between tokens } and 'else'\n" if $buf =~ /\}else\b/;
  print "need space between tokens 'else' and {\n" if $buf =~ /\belse\{/;
  print "need space between tokens 'do' and {\n" if $buf =~ /\bdo\{/;
  print "need space between tokens } and 'while'\n" if $buf =~ /\}while\b/;

  print "no space permitted before ;\n" if $buf =~ /\s+;/;
  print "no space permitted between tokens 'if' and (\n" if $buf =~ /\bif\s\(/;
  print "no space permitted between tokens 'while' and (\n" if $buf =~ /\bwhile\s\(/;
  print "no space permitted between tokens 'for' and (\n" if $buf =~ /\bfor\s\(/;

  my $code = $buf;
  $code =~ s,\\.,.,g;
  $code =~ s,"[^"]*","",g;

  #print "'if' blocks must be braced, '{' should be last character on block opening line\n" if $code =~ /\bif\b.*[^{]\s*$/m;
  #print "'while' blocks must be braced, '{' should be last character on block opening line\n" if $code =~ /\bwhile\b.*[^{]\s*$/m;
  #print "'for' blocks must be braced, '{' should be last character on block opening line\n" if $code =~ /\bfor\b.*[^{]\s*$/m;
  print "'else' cannot start a line (should follow preceding '}')\n" if $code =~ /^\s+else\b/m;
}

sub check_as_header_cpp {
  my($buf) = @_;
  check_as_any_cpp($buf);
}

sub check_as_source_cpp {
  my($buf) = @_;
  check_as_any_cpp($buf);
}

## Local Variables:
## perl-indent-level: 2
## perl-brace-offset: 0
## End: