#!/usr/local/bin/perl
#
# subroutines to assist in
#  1. reading test headers
#  2. reading test output
#  3. making pass/fail decision
#
# [returns 1 to make perl happy]
1;

# Example header:
#
# ... TEST_HEADER
# summary=try lots of allocation to provoke errors
# language=c; link=testlib.o
# OUTPUT_SPEC
# alloc=OK
# size1>20
# END_HEADER ...
#
# header information is stored in associative arrays:
# %test_header
# %spec_output
# %spec_rel
#
# $test_header{key} = value;
# $spec_output{key} = value;
# $spec_rel{key} = relation;
#

sub readheader {
 local($infile, $loud) = @_;
 
 unless (open(IN, $infile)) {
  die "File ".$infile." not found.";
 }

 $_ = "";
 while (! /TEST_HEADER/) {
  ($_ = <IN>) || die "Couldn't find start of test header in $infile.\n";
 }
 s/.*TEST_HEADER//;
 $line = $_;
 while (! /END_HEADER/) {
  ($_ = <IN> || die "Couldn't find end of test header in $infile.\n");
  chop;
  $line = $line."; ".$_;
 }
 $line =~ s/END_HEADER.*//;

 if ($line =~ /OUTPUT_SPEC/) {
  $line =~ /(.*)OUTPUT_SPEC(.*)/;
  $header = $1;
  $outspec = $2;
 } else {
  if ($loud) {
   print "No output specification -- assuming result=pass required.\n";
  }
  $header = $line;
  $outspec = "result=pass";
 }

 &readvals($header, "=");
 %test_header = %keyvalues;

 &readvals($outspec, "=|<|>|<=|>=");
 %spec_output = %keyvalues;
 %spec_rel    = %keyrelations;

 close(IN);
}

sub readvals {
 local ($_, $relations) = @_;

 %keyvalues = ();
 %keyrelations = ();

 s/([^\/]);/$1;;/g;

 foreach (split(/\s*;;\s*/)) {
  s/\\(\\|;)/$1/g;

  if (m/^\W*(\w+)\s*($relations)\s*(.+)\s*/) {
   $keyvalues{$1} = $3;
   $keyrelations{$1} = $2;
  } else {
   unless (m/^\W*/) {
    print "Bad header item: ".$_." in $infile.\n";
   }
  }
 }
}