| 1 | #======================================================================================
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| 2 | #
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| 3 | # Project name : XTIDE Universal BIOS
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| 4 | #
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| 5 | # Authors : Greg Lindhorst
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| 6 | # gregli@hotmail.com
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| 7 | #
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| 8 | # Description : Script for compiling and compressing strings for
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| 9 | # use by DisplayFormatCompressed.asm. See the header of that file
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| 10 | # for a description of the compression scheme.
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| 11 | #
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| 12 | # Usage : stdin: Listing of strings.asm,
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| 13 | # assembled with MODULE_STRINGS_COMPRESSED_PRECOMPRESS.
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| 14 | # We used the listing so that the assembler can take care of
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| 15 | # resolving %define and EQU symbol definitions.
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| 16 | #
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| 17 | # stdout: StringsCompressed.asm,
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| 18 | # plug replacement for Strings.asm (included by Main.asm)
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| 19 | #
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| 20 | # Also see the XTIDE makefile for building StringsCompressed.asm
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| 21 | #
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| 22 |
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| 23 | #----------------------------------------------------------------------
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| 24 | #
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| 25 | # Translated, Format, and "Normal" characters
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| 26 | #
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| 27 | # DisplayFormatCompressed can only deal with characters in one of the following categories:
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| 28 | # 1. Those in the Translate associative array
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| 29 | # 2. Those in the Format associative array
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| 30 | # 3. Characters between $normal_base and $normal_base+0x40
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| 31 | # (typically covers upper and lower case alphabets)
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| 32 | # 4. Null characters (marking the end of strings)
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| 33 | # 5. The special string LF,CR
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| 34 | #
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| 35 | # If a character or format read at the input cannot be found in one of the above categories,
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| 36 | # it must be added here before this script will accept it (and DisplayFormatCompressed can
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| 37 | # display it).
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| 38 | #
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| 39 | # Tables for the above categories are expected in the input stream, before string to be
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| 40 | # compressed are provided. Note that these tables are not present in DisplayFormatCompressed,
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| 41 | # and do not need to be updated there. Needed information is put in the compression output
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| 42 | # that it reads.
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| 43 | #
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| 44 |
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| 45 | #
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| 46 | # High order code bits, determining which type of character we have (translated or not) and
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| 47 | # if a space or null should come after this character.
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| 48 | #
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| 49 | $code_space = 0xc0;
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| 50 | $code_null = 0x80;
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| 51 | $code_normal = 0x40;
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| 52 | $code_translate = 0x00;
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| 53 |
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| 54 | #
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| 55 | # Bit used if it is a translated byte
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| 56 | #
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| 57 | $code_translate_null = 0x00;
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| 58 | $code_translate_normal = 0x20;
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| 59 |
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| 60 | print ";;;======================================================================\n";
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| 61 | print ";;;\n";
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| 62 | print ";;; This file is generated by StringsCompress.pl from source in Strings.asm\n";
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| 63 | print ";;; DO NOT EDIT DIRECTLY - See the makefile for how to rebuild this file.\n";
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| 64 | print ";;; This file only needs to be rebuilt if Strings.asm is changed.\n";
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| 65 | print ";;;\n";
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| 66 | print ";;;======================================================================\n\n";
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| 67 |
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| 68 |
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| 69 | #
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| 70 | # On a first pass, look for our table directives. $translate{...}, $format{...}, etc.
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| 71 | # are expected in the input stream.
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| 72 | #
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| 73 | $processed = " [StringsCompress Processed]";
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| 74 | while(<>)
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| 75 | {
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| 76 | chop;
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| 77 | $o = $_;
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| 78 |
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| 79 | #
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| 80 | # Table entries for this script
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| 81 | #
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| 82 | if( /^\s*\d+\s*(\;\$translate\{\s*ord\(\s*'(.)'\s*\)\s*\}\s*=\s*([0-9]+).*$)/ )
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| 83 | {
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| 84 | $translate{ord($2)} = int($3);
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| 85 | $o .= $processed;
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| 86 | }
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| 87 | elsif( /^\s*\d+\s*(\;\$translate\{\s*([0-9]+)\s*\}\s*=\s*([0-9]+).*$)/ )
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| 88 | {
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| 89 | $translate{int($2)} = int($3);
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| 90 | $o .= $processed;
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| 91 | }
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| 92 | elsif( /^\s*\d+\s*(\;\$format_begin\s*=\s*([0-9]+).*$)/ )
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| 93 | {
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| 94 | $format_begin = int($2);
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| 95 | $o .= $processed;
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| 96 | }
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| 97 | elsif( /^\s*\d+\s*(\;\$format\{\s*\"([^\"]+)\"\s*\}\s*=\s*([0-9]+).*$)/ )
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| 98 | {
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| 99 | $format{$2} = int($3);
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| 100 | $o .= $processed;
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| 101 | }
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| 102 | elsif( /^\s*\d+\s*(\;\$normal_base\s*=\s*0x([0-9a-fA-F]+).*$)/ )
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| 103 | {
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| 104 | $normal_base = hex($2);
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| 105 | $o .= $processed;
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| 106 | }
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| 107 | elsif( /^\s*\d+\s*(\;\$normal_base\s*=\s*([0-9]+).*$)/ )
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| 108 | {
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| 109 | $normal_base = int($2);
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| 110 | $o .= $processed;
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| 111 | }
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| 112 |
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| 113 | push( @lines, $o );
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| 114 | }
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| 115 |
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| 116 | #
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| 117 | # On the second pass, loop through lines of the listing, looking for 'db' lines
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| 118 | # (and dealing with continuations) and compressing each line as it is encountered.
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| 119 | #
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| 120 | for( $l = 0; $l < $#lines; $l++ )
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| 121 | {
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| 122 | $_ = $lines[$l];
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| 123 |
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| 124 | #
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| 125 | # The <number> indicates a line from an include file, do not include in the output
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| 126 | #
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| 127 | if( /^\s*\d+\s*\<\d\>/ )
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| 128 | {
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| 129 | }
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| 130 |
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| 131 | #
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| 132 | # a 'db' line, with or without a label
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| 133 | #
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| 134 | elsif( /^\s*\d+\s[0-9A-F]+\s([0-9A-F]+)(-?)\s+([a-z0-9_]+:)?(\s+)(db\s+)(.*)/i )
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| 135 | {
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| 136 | $bytes = $1;
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| 137 | $continuation = $2;
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| 138 | $label = $3;
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| 139 | $spacing = $4;
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| 140 | $db = $5;
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| 141 | $string = $6;
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| 142 |
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| 143 | print $label.$spacing."; ".$db.$string."\n";
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| 144 |
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| 145 | if( $continuation eq "-" )
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| 146 | {
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| 147 | do
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| 148 | {
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| 149 | $_ = $lines[++$l];
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| 150 | /^\s*\d+\s[0-9A-F]+\s([0-9A-F]+)(\-?)/i || die "parse error on continuation: '".$_."'";
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| 151 | $bytes .= $1;
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| 152 | $continuation = $2;
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| 153 | }
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| 154 | while( $continuation eq "-" );
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| 155 | }
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| 156 |
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| 157 | &processString( $bytes, $label.$spacing, $db );
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| 158 | }
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| 159 |
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| 160 | #
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| 161 | # everything else, copy to the output as is
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| 162 | #
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| 163 | elsif( /^\s*\d+\s*(.*)$/ )
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| 164 | {
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| 165 | print $1."\n";
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| 166 | }
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| 167 | }
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| 168 |
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| 169 | print ";;; end of input stream\n\n";
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| 170 |
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| 171 | #--------------------------------------------------------------------------------
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| 172 | #
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| 173 | # Output constants and the TranslatesAndFormats table
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| 174 | #
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| 175 |
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| 176 | print "StringsCompressed_NormalBase equ ".$normal_base."\n\n";
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| 177 |
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| 178 | print "StringsCompressed_FormatsBegin equ ".$format_begin."\n\n";
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| 179 |
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| 180 | print "StringsCompressed_TranslatesAndFormats: \n";
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| 181 |
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| 182 | foreach $f (keys(%translate))
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| 183 | {
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| 184 | $translate_index[$translate{$f}] = $f;
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| 185 | $used{$f} || die "translate $f unused\n";
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| 186 | $translate{$f} <= 31 || die $translate{$f}.": translate codes must be below 32";
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| 187 | }
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| 188 |
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| 189 | for( $g = 0; $translate_index[$g]; $g++ )
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| 190 | {
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| 191 | print " db ".$translate_index[$g]." ; ".$g."\n";
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| 192 | }
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| 193 |
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| 194 | foreach $f (keys(%format))
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| 195 | {
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| 196 | $n = $f;
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| 197 | $n =~ s/\-/_/g;
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| 198 | $format_index[$format{$f}] = "DisplayFormatCompressed_Format_".$n;
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| 199 | $used{$f} || die "format $f unused\n";
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| 200 | $format{$f} <= 31 || die $format{$f}.": format codes must be below 32";
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| 201 | }
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| 202 |
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| 203 | for( $t = $format_begin; $format_index[$t]; $t++ )
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| 204 | {
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| 205 | print " db (DisplayFormatCompressed_BaseFormatOffset - ".$format_index[$t].") ; ".$t."\n";
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| 206 | }
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| 207 |
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| 208 | print "\n";
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| 209 |
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| 210 | #
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| 211 | # Ensure that branch targets are within reach
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| 212 | #
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| 213 | print "%ifndef CHECK_FOR_UNUSED_ENTRYPOINTS\n";
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| 214 | for( $t = $format_begin; $format_index[$t]; $t++ )
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| 215 | {
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| 216 | print "%if DisplayFormatCompressed_BaseFormatOffset < $format_index[$t] || DisplayFormatCompressed_BaseFormatOffset - $format_index[$t] > 255\n";
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| 217 | print "%error \"".$format_index[$t]." is out of range of DisplayFormatCompressed_BaseFormatOffset\"\n";
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| 218 | print "%endif\n";
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| 219 | }
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| 220 | print "%endif\n";
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| 221 |
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| 222 | #--------------------------------------------------------------------------------
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| 223 | #
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| 224 | # Output usage statistics
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| 225 | #
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| 226 |
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| 227 | print "\n;; translated usage stats\n";
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| 228 | foreach $f (keys(%translate))
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| 229 | {
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| 230 | print ";; ".$f.":".$used{$f}."\n";
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| 231 | $translate_count++;
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| 232 | }
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| 233 | print ";; total translated: ".$translate_count."\n";
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| 234 |
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| 235 | print "\n;; format usage stats\n";
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| 236 | $format_count = 0;
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| 237 | foreach $f (keys(%format))
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| 238 | {
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| 239 | print ";; ".$f.":".$used{$f}."\n";
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| 240 | $format_count++;
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| 241 | }
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| 242 | print ";; total format: ".$format_count."\n";
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| 243 |
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| 244 | print "\n;; alphabet usage stats\n";
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| 245 |
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| 246 | $used_count = 0;
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| 247 | for( $t = $normal_base; $t < $normal_base + 0x40; $t++ )
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| 248 | {
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| 249 | print ";; ".$t.",".chr($t).":".$used{$t}."\n";
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| 250 | if( $used{$t} )
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| 251 | {
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| 252 | $used_count++;
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| 253 | }
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| 254 | }
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| 255 | print ";; alphabet used count: ".$used_count."\n";
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| 256 |
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| 257 | #--------------------------------------------------------------------------------
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| 258 | #
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| 259 | # processString does the real compression work...
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| 260 | #
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| 261 |
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| 262 | sub processString
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| 263 | {
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| 264 | $chars = $_[0];
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| 265 | $label = $_[1];
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| 266 | $db = $_[2];
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| 267 |
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| 268 | $label =~ s/[a-z0-9_:]/ /ig; # replace with spaces for proper output spacing
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| 269 |
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| 270 | #
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| 271 | # Copy numeric bytes out of hexadecimal pairs in the listing
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| 272 | #
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| 273 | $#v = 0;
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| 274 |
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| 275 | $orig = "";
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| 276 | for( $g = 0; $g < length($chars); $g += 2 )
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| 277 | {
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| 278 | $i = $g/2;
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| 279 | $v[$i] = hex(substr($chars,$g,2));
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| 280 | $orig .= sprintf( ($v[$i] > 0x9f ? ", %03xh" : ", %02xh"), $v[$i] );
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| 281 | }
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| 282 | $v[length($chars)/2] = 0xff; # guard byte to avoid thinking going past the end of
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| 283 | # the string is a null
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| 284 |
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| 285 | $output = "";
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| 286 | #
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| 287 | # Loop through bytes...
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| 288 | # looking ahead as needed for possible space and null optimizations, compiling formats
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| 289 | #
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| 290 | for( $g = 0; $g < $#v-1; $g++ ) # -1 for the guard byte
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| 291 | {
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| 292 | #
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| 293 | # Special translation of LF,CR to a format
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| 294 | #
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| 295 | if( $v[$g] == 10 && $v[$g+1] == 13 )
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| 296 | {
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| 297 | $g++;
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| 298 | $post = $code_translate;
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| 299 | $code = $format{"nl"};
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| 300 | $used{"nl"}++;
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| 301 | }
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| 302 |
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| 303 | #
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| 304 | # Format operators
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| 305 | #
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| 306 | elsif( $v[$g] == 0x25 ) # "%"
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| 307 | {
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| 308 | $fo = "";
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| 309 | $g++;
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| 310 | if( $v[$g] >= ord("0") && $v[$g] <= ord("9") )
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| 311 | {
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| 312 | $fo = $fo.chr($v[$g]);
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| 313 | $g++;
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| 314 | }
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| 315 | if( $v[$g] == ord("-") )
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| 316 | {
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| 317 | $fo = $fo.chr($v[$g]);
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| 318 | $g++;
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| 319 | }
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| 320 | $fo = $fo.chr($v[$g]);
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| 321 |
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| 322 | $format{$fo} || die "unknown format operator: '".$fo."'\n";
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| 323 |
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| 324 | $code = $format{$fo};
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| 325 | $post = $code_translate;
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| 326 | $used{$fo}++;
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| 327 | }
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| 328 |
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| 329 | #
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| 330 | # Translated characters
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| 331 | #
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| 332 | elsif( $v[$g] == 32 || $translate{$v[$g]} )
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| 333 | {
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| 334 | $post = $code_translate;
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| 335 | $code = $translate{$v[$g]};
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| 336 | $used{$v[$g]}++;
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| 337 | }
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| 338 |
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| 339 | #
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| 340 | # "normal" characters (alphabet, and ASCII characters around the alphabet)
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| 341 | #
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| 342 | elsif( $v[$g] >= $normal_base && $v[$g] < ($normal_base+0x40) )
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| 343 | {
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| 344 | $used{$v[$g]}++;
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| 345 |
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| 346 | $post = $code_normal;
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| 347 | $code = $v[$g] - $normal_base;
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| 348 | }
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| 349 |
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| 350 | #
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| 351 | # Not found
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| 352 | #
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| 353 | else
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| 354 | {
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| 355 | die $v[$g].": no translation or format, and out of normal range - may need to be added\n";
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| 356 | }
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| 357 |
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| 358 | if( $post == $code_translate )
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| 359 | {
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| 360 | #
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| 361 | # NULL optimization (space optimization not possible on translate/format)
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| 362 | #
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| 363 | if( $v[$g+1] == 0 )
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| 364 | {
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| 365 | $g++;
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| 366 | $post = $post | $code_translate_null;
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| 367 | }
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| 368 | else
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| 369 | {
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| 370 | $post = $post | $code_translate_normal;
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| 371 | }
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| 372 | }
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| 373 | else # $post == $code_normal
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| 374 | {
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| 375 | #
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| 376 | # Space optimization
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| 377 | #
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| 378 | if( $v[$g+1] == 0x20 && $v[$g+2] != 0 )
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| 379 | {
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| 380 | # can't take this optimization if the next byte is a null,
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| 381 | # since we can't have both a postfix space and null
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| 382 | $g++;
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| 383 | $post = $code_space;
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| 384 | }
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| 385 |
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| 386 | #
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| 387 | # NULL optimization
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| 388 | #
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| 389 | elsif( $v[$g+1] == 0 )
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| 390 | {
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| 391 | $g++;
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| 392 | $post = $code_null;
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| 393 | }
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| 394 | }
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| 395 |
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| 396 | $code = $code | $post;
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| 397 | $output .= sprintf( ($code > 0x9f ? ", %03xh" : ", %02xh"), $code );
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| 398 | }
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| 399 |
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| 400 | print $label."; ".$db.substr($orig,2)." ; uncompressed\n";
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| 401 | print $label." ".$db.substr($output,2);
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| 402 | for( $t = length($output); $t < length($orig); $t++ )
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| 403 | {
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| 404 | print " ";
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| 405 | }
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| 406 | print " ; compressed\n\n";
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| 407 | }
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| 408 |
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