Contents of /code/trunk/maintain/Builducptable

#! /usr/bin/perl -w

# This is a Perl script to create the table of character properties. For 
# information on the format, see ucpinternal.h. The Unicode files are
# expected to be in maintain/Unicode.tables/{Scripts,UnicodeData}.txt. The
# ucp.h file is also required. The table is written to the standard output.

# The script is rather slow because it just searches linearly through the
# Scripts data in order to find the script for each character or character
# range. It could be made faster by sorting that data, or something, but hey,
# it is only ever run once in a blue moon.

# Subroutine: Given a character number, return the script number. The 
# Scripts.txt file has been read into an array, keeping just the codepoints
# and the script name. The lines are in one of two formats:
#
# xxxx name
# xxxx..yyyy name
#
# where xxxx and yyyy are code points.

sub script{
my($n) = $_[0];
foreach $line (@scriptlist)
  {
  my($a,$z,$s);
    
  if ($line =~ /\.\./)
    {
    ($a,$z,$s) = $line =~ /^([^\.]+)\.\.(\S+)\s+(.*)/;
    }
  else
    {
    ($a,$s) = $line =~ /^(\S+)\s+(.*)/;
    $z = $a; 
    }       
  
  die "Problem on this scripts data line:\n$line"
    if (!defined $a || !defined $z);

  if ($n >= hex($a) && $n <= hex($z))
    {
    my($x) = $scriptnum{$s};
    return $x if defined $x; 
    die "Can't find script number for $s\n"; 
    }  
  } 
  
# All code points not explicitly listed are "Common" 

return $scriptnum{"Common"};
}


# Subroutine: given a category name, return its number

sub category {
my($x) = $gencat{$_[0]};
return $x if defined $x;
die "Can't find number for general category $_[0]\n";
}


# Subroutine: output an entry for a range, unless it isn't really a range,
# in which case just output a single entry.

sub outrange{
my($cp,$ncp,$gc) = @_;
my($flag) = ($cp != $ncp)? 0x00800000 : 0;
printf "  { 0x%08x, 0x%08x },\n",
 $cp | $flag | (script($cp) << 24), 
  (category($gc) << 26) | $ncp - $cp;
}


# Entry point: An argument giving the Unicode version is required.

die "Require a single argument, the Unicode version"
  if ($#ARGV != 0);
$Uversion = shift @ARGV; 


# Read in the Scripts.txt file, retaining only the code points
# and script names.

open(IN, "Unicode.tables/Scripts.txt") ||
  die "Can't open Unicode.tables/Scripts.txt: $!\n";
  
while (<IN>)
  {
  next if !/^[0-9A-Z]/;
  my($range,$name) = $_ =~ /^(\S+)\s*;\s*(\S+)/;
  push @scriptlist, "$range $name";
  }  
close(IN);


# Now read the ucp.h file to get the values for the general categories
# and for the scripts.

open(IN, "ucp.h") || die "Can't open ucp.h: $!\n";

while (<IN>) { last if /^enum/; }
while (<IN>) { last if /^enum/; }


# The second enum are the general categories.

$count = 0;
while (<IN>)
  {
  last if $_ !~ /^\s+ucp_(..)/;
  $gencat{$1} = $count++; 
  } 

while (<IN>) { last if /^enum/; }

# The third enum are script names.

$count = 0;
while (<IN>)
  {
  last if $_ !~ /^\s+ucp_(\w+)/; 
  $scriptnum{$1} = $count++;
  }  

close(IN);

# Write out the initial boilerplace.

print "/* This source module is automatically generated from the Unicode\n" .
  "property table. See ucpinternal.h for a description of the layout.\n" .
  "This version was made from the Unicode $Uversion tables. */\n\n" .
  "static cnode ucp_table[] = {\n";

# Now read the input file and generate the output.

open(IN, "Unicode.tables/UnicodeData.txt") || 
  die "Can't open Unicode.tables/UnicodeData.txt: $!\n";

while (<IN>)
  {
  @fields = split /;/;
  
  $cp = hex($fields[0]);
  $gc = $fields[2];
  $uc = $fields[12]; 
  $lc = $fields[13];
  
  # If this line has no "other case" data, it might be the start or end of
  # a range, either one that is explicit in the data, or one that we can
  # create by scanning forwards.  
  
  if ($uc eq "" && $lc eq "")
    {
    if ($fields[1] =~ /First>$/)
      {
      $_ = <IN>;
      @fields = split /;/;
      die "First not followed by Last\n", if $fields[1] !~ /Last>$/;
      die "First and last have different categories\n", 
        if $gc ne $fields[2];
      outrange($cp, hex($fields[0]), $gc);
      }  
 
    else
      { 
      my($ncp) = $cp + 1;
      while (<IN>)
        {
        @fields = split /;/;
        last if (hex($fields[0]) != $ncp ||
                 $fields[2]  ne $gc  ||
                 $fields[12] ne ""  ||
                 $fields[13] ne "");
                
        $ncp++;
        }  
      
      $ncp--;
      outrange($cp, $ncp, $gc);
      redo if defined $_;             # Reprocess terminating line
      } 
    }
    
  # If there is an "other case" character, we output a single-char line

  else
    {
    my($co) = (hex(($uc eq "")? $lc : $uc) - $cp) & 0xffff;
    printf "  { 0x%08x, 0x%08x },\n",
     $cp | (script($cp) << 24), (category($gc) << 26) | $co;
    }   
  }
  
close(IN);

# Final boilerplate

print "};\n"; 
  
# End  
1	#! /usr/bin/perl -w
2
3	# This is a Perl script to create the table of character properties. For
4	# information on the format, see ucpinternal.h. The Unicode files are
5	# expected to be in maintain/Unicode.tables/{Scripts,UnicodeData}.txt. The
6	# ucp.h file is also required. The table is written to the standard output.
7
8	# The script is rather slow because it just searches linearly through the
9	# Scripts data in order to find the script for each character or character
10	# range. It could be made faster by sorting that data, or something, but hey,
11	# it is only ever run once in a blue moon.
12
13	# Subroutine: Given a character number, return the script number. The
14	# Scripts.txt file has been read into an array, keeping just the codepoints
15	# and the script name. The lines are in one of two formats:
16	#
17	# xxxx name
18	# xxxx..yyyy name
19	#
20	# where xxxx and yyyy are code points.
21
22	sub script{
23	my($n) = $_[0];
24	foreach $line (@scriptlist)
25	{
26	my($a,$z,$s);
27
28	if ($line =~ /\.\./)
29	{
30	($a,$z,$s) = $line =~ /^([^\.]+)\.\.(\S+)\s+(.*)/;
31	}
32	else
33	{
34	($a,$s) = $line =~ /^(\S+)\s+(.*)/;
35	$z = $a;
36	}
37
38	die "Problem on this scripts data line:\n$line"
39	if (!defined $a \|\| !defined $z);
40
41	if ($n >= hex($a) && $n <= hex($z))
42	{
43	my($x) = $scriptnum{$s};
44	return $x if defined $x;
45	die "Can't find script number for $s\n";
46	}
47	}
48
49	# All code points not explicitly listed are "Common"
50
51	return $scriptnum{"Common"};
52	}
53
54
55	# Subroutine: given a category name, return its number
56
57	sub category {
58	my($x) = $gencat{$_[0]};
59	return $x if defined $x;
60	die "Can't find number for general category $_[0]\n";
61	}
62
63
64	# Subroutine: output an entry for a range, unless it isn't really a range,
65	# in which case just output a single entry.
66
67	sub outrange{
68	my($cp,$ncp,$gc) = @_;
69	my($flag) = ($cp != $ncp)? 0x00800000 : 0;
70	printf " { 0x%08x, 0x%08x },\n",
71	$cp \| $flag \| (script($cp) << 24),
72	(category($gc) << 26) \| $ncp - $cp;
73	}
74
75
76	# Entry point: An argument giving the Unicode version is required.
77
78	die "Require a single argument, the Unicode version"
79	if ($#ARGV != 0);
80	$Uversion = shift @ARGV;
81
82
83	# Read in the Scripts.txt file, retaining only the code points
84	# and script names.
85
86	open(IN, "Unicode.tables/Scripts.txt") \|\|
87	die "Can't open Unicode.tables/Scripts.txt: $!\n";
88
89	while (<IN>)
90	{
91	next if !/^[0-9A-Z]/;
92	my($range,$name) = $_ =~ /^(\S+)\s;\s(\S+)/;
93	push @scriptlist, "$range $name";
94	}
95	close(IN);
96
97
98	# Now read the ucp.h file to get the values for the general categories
99	# and for the scripts.
100
101	open(IN, "ucp.h") \|\| die "Can't open ucp.h: $!\n";
102
103	while (<IN>) { last if /^enum/; }
104	while (<IN>) { last if /^enum/; }
105
106
107	# The second enum are the general categories.
108
109	$count = 0;
110	while (<IN>)
111	{
112	last if $_ !~ /^\s+ucp_(..)/;
113	$gencat{$1} = $count++;
114	}
115
116	while (<IN>) { last if /^enum/; }
117
118	# The third enum are script names.
119
120	$count = 0;
121	while (<IN>)
122	{
123	last if $_ !~ /^\s+ucp_(\w+)/;
124	$scriptnum{$1} = $count++;
125	}
126
127	close(IN);
128
129	# Write out the initial boilerplace.
130
131	print "/* This source module is automatically generated from the Unicode\n" .
132	"property table. See ucpinternal.h for a description of the layout.\n" .
133	"This version was made from the Unicode $Uversion tables. */\n\n" .
134	"static cnode ucp_table[] = {\n";
135
136	# Now read the input file and generate the output.
137
138	open(IN, "Unicode.tables/UnicodeData.txt") \|\|
139	die "Can't open Unicode.tables/UnicodeData.txt: $!\n";
140
141	while (<IN>)
142	{
143	@fields = split /;/;
144
145	$cp = hex($fields[0]);
146	$gc = $fields[2];
147	$uc = $fields[12];
148	$lc = $fields[13];
149
150	# If this line has no "other case" data, it might be the start or end of
151	# a range, either one that is explicit in the data, or one that we can
152	# create by scanning forwards.
153
154	if ($uc eq "" && $lc eq "")
155	{
156	if ($fields[1] =~ /First>$/)
157	{
158	$_ = <IN>;
159	@fields = split /;/;
160	die "First not followed by Last\n", if $fields[1] !~ /Last>$/;
161	die "First and last have different categories\n",
162	if $gc ne $fields[2];
163	outrange($cp, hex($fields[0]), $gc);
164	}
165
166	else
167	{
168	my($ncp) = $cp + 1;
169	while (<IN>)
170	{
171	@fields = split /;/;
172	last if (hex($fields[0]) != $ncp \|\|
173	$fields[2] ne $gc \|\|
174	$fields[12] ne "" \|\|
175	$fields[13] ne "");
176
177	$ncp++;
178	}
179
180	$ncp--;
181	outrange($cp, $ncp, $gc);
182	redo if defined $_; # Reprocess terminating line
183	}
184	}
185
186	# If there is an "other case" character, we output a single-char line
187
188	else
189	{
190	my($co) = (hex(($uc eq "")? $lc : $uc) - $cp) & 0xffff;
191	printf " { 0x%08x, 0x%08x },\n",
192	$cp \| (script($cp) << 24), (category($gc) << 26) \| $co;
193	}
194	}
195
196	close(IN);
197
198	# Final boilerplate
199
200	print "};\n";
201
202	# End