X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=pod%2Fperlebcdic.pod;h=f690595a7b4bdd8c41fd6147234d6a62a9a1cd04;hb=f5d8aca1e51e677519775b879a4d41b6f78d07d2;hp=0305b6b323236f5d07d89e050f3ef3bd6fa3c72a;hpb=aa2b82fcd287c16c76ad7206bc32889229a2f2ec;p=p5sagit%2Fp5-mst-13.2.git diff --git a/pod/perlebcdic.pod b/pod/perlebcdic.pod index 0305b6b..f690595 100644 --- a/pod/perlebcdic.pod +++ b/pod/perlebcdic.pod @@ -1,3 +1,5 @@ +=encoding utf8 + =head1 NAME perlebcdic - Considerations for running Perl on EBCDIC platforms @@ -11,13 +13,18 @@ than some discussion of UTF-8 and UTF-EBCDIC. Portions that are still incomplete are marked with XXX. +Perl used to work on EBCDIC machines, but there are now areas of the code where +it doesn't. If you want to use Perl on an EBCDIC machine, please let us know +by sending mail to perlbug@perl.org + =head1 COMMON CHARACTER CODE SETS =head2 ASCII -The American Standard Code for Information Interchange is a set of +The American Standard Code for Information Interchange (ASCII or US-ASCII) is a +set of integers running from 0 to 127 (decimal) that imply character -interpretation by the display and other system(s) of computers. +interpretation by the display and other systems of computers. The range 0..127 can be covered by setting the bits in a 7-bit binary digit, hence the set is sometimes referred to as a "7-bit ASCII". ASCII was described by the American National Standards Institute @@ -56,20 +63,21 @@ also known as CCSID 819 (or sometimes 0819 or even 00819). =head2 EBCDIC The Extended Binary Coded Decimal Interchange Code refers to a -large collection of slightly different single and multi byte -coded character sets that are different from ASCII or ISO 8859-1 -and typically run on host computers. The EBCDIC encodings derive -from 8 bit byte extensions of Hollerith punched card encodings. -The layout on the cards was such that high bits were set for the -upper and lower case alphabet characters [a-z] and [A-Z], but there -were gaps within each latin alphabet range. +large collection of single and multi byte coded character sets that are +different from ASCII or ISO 8859-1 and are all slightly different from each +other; they typically run on host computers. The EBCDIC encodings derive from +8 bit byte extensions of Hollerith punched card encodings. The layout on the +cards was such that high bits were set for the upper and lower case alphabet +characters [a-z] and [A-Z], but there were gaps within each Latin alphabet +range. Some IBM EBCDIC character sets may be known by character code set -identification numbers (CCSID numbers) or code page numbers. Leading -zero digits in CCSID numbers within this document are insignificant. -E.g. CCSID 0037 may be referred to as 37 in places. +identification numbers (CCSID numbers) or code page numbers. -=head2 13 variant characters +Perl can be compiled on platforms that run any of three commonly used EBCDIC +character sets, listed below. + +=head2 The 13 variant characters Among IBM EBCDIC character code sets there are 13 characters that are often mapped to different integer values. Those characters @@ -77,12 +85,19 @@ are known as the 13 "variant" characters and are: \ [ ] { } ^ ~ ! # | $ @ ` +When Perl is compiled for a platform, it looks at some of these characters to +guess which EBCDIC character set the platform uses, and adapts itself +accordingly to that platform. If the platform uses a character set that is not +one of the three Perl knows about, Perl will either fail to compile, or +mistakenly and silently choose one of the three. +They are: + =head2 0037 Character code set ID 0037 is a mapping of the ASCII plus Latin-1 characters (i.e. ISO 8859-1) to an EBCDIC set. 0037 is used in North American English locales on the OS/400 operating system -that runs on AS/400 computers. CCSID 37 differs from ISO 8859-1 +that runs on AS/400 computers. CCSID 0037 differs from ISO 8859-1 in 237 places, in other words they agree on only 19 code point values. =head2 1047 @@ -109,8 +124,8 @@ The problem is: which code points to use for code points less than 256? In EBCDIC, for the low 256 the EBCDIC code points are used. This means that the equivalences - pack("U", ord($character)) eq $character - unpack("U", $character) == ord $character + pack("U", ord($character)) eq $character + unpack("U", $character) == ord $character will hold. (If Unicode code points were applied consistently over all the possible code points, pack("U",ord("A")) would in EBCDIC @@ -123,10 +138,7 @@ equal I or chr(101), and unpack("U", "A") would equal =item * -Many of the remaining seem to be related to case-insensitive matching: -for example, C<< /[\x{131}]/ >> (LATIN SMALL LETTER DOTLESS I) does -not match "I" case-insensitively, as it should under Unicode. -(The match succeeds in ASCII-derived platforms.) +Many of the remaining problems seem to be related to case-insensitive matching =item * @@ -137,33 +149,56 @@ supported under EBCDIC, likewise for the encoding pragma. =head2 Unicode and UTF -UTF is a Unicode Transformation Format. UTF-8 is a Unicode conforming -representation of the Unicode standard that looks very much like ASCII. -UTF-EBCDIC is an attempt to represent Unicode characters in an EBCDIC -transparent manner. +UTF stands for C. +UTF-8 is an encoding of Unicode into a sequence of 8-bit byte chunks, based on +ASCII and Latin-1. +The length of a sequence required to represent a Unicode code point +depends on the ordinal number of that code point, +with larger numbers requiring more bytes. +UTF-EBCDIC is like UTF-8, but based on EBCDIC. + +You may see the term C character or code point. +This simply means that the character has the same numeric +value when encoded as when not. +(Note that this is a very different concept from L +mentioned above.) +For example, the ordinal value of 'A' is 193 in most EBCDIC code pages, +and also is 193 when encoded in UTF-EBCDIC. +All variant code points occupy at least two bytes when encoded. +In UTF-8, the code points corresponding to the lowest 128 +ordinal numbers (0 - 127: the ASCII characters) are invariant. +In UTF-EBCDIC, there are 160 invariant characters. +(If you care, the EBCDIC invariants are those characters +which have ASCII equivalents, plus those that correspond to +the C1 controls (80..9f on ASCII platforms).) + +A string encoded in UTF-EBCDIC may be longer (but never shorter) than +one encoded in UTF-8. =head2 Using Encode Starting from Perl 5.8 you can use the standard new module Encode -to translate from EBCDIC to Latin-1 code points +to translate from EBCDIC to Latin-1 code points. +Encode knows about more EBCDIC character sets than Perl can currently +be compiled to run on. - use Encode 'from_to'; + use Encode 'from_to'; - my %ebcdic = ( 176 => 'cp37', 95 => 'cp1047', 106 => 'posix-bc' ); + my %ebcdic = ( 176 => 'cp37', 95 => 'cp1047', 106 => 'posix-bc' ); - # $a is in EBCDIC code points - from_to($a, $ebcdic{ord '^'}, 'latin1'); - # $a is ISO 8859-1 code points + # $a is in EBCDIC code points + from_to($a, $ebcdic{ord '^'}, 'latin1'); + # $a is ISO 8859-1 code points and from Latin-1 code points to EBCDIC code points - use Encode 'from_to'; + use Encode 'from_to'; - my %ebcdic = ( 176 => 'cp37', 95 => 'cp1047', 106 => 'posix-bc' ); + my %ebcdic = ( 176 => 'cp37', 95 => 'cp1047', 106 => 'posix-bc' ); - # $a is ISO 8859-1 code points - from_to($a, 'latin1', $ebcdic{ord '^'}); - # $a is in EBCDIC code points + # $a is ISO 8859-1 code points + from_to($a, 'latin1', $ebcdic{ord '^'}); + # $a is in EBCDIC code points For doing I/O it is suggested that you use the autotranslating features of PerlIO, see L. @@ -181,9 +216,11 @@ you to use different encodings per IO channel. For example you may use open($f, ">:encoding(utf8)", "test.utf8"); print $f "Hello World!\n"; -to get two files containing "Hello World!\n" in ASCII, CP 37 EBCDIC, -ISO 8859-1 (Latin-1) (in this example identical to ASCII) respective -UTF-EBCDIC (in this example identical to normal EBCDIC). See the +to get four files containing "Hello World!\n" in ASCII, CP 0037 EBCDIC, +ISO 8859-1 (Latin-1) (in this example identical to ASCII since only ASCII +characters were printed), and +UTF-EBCDIC (in this example identical to normal EBCDIC since only characters +that don't differ between EBCDIC and UTF-EBCDIC were printed). See the documentation of Encode::PerlIO for details. As the PerlIO layer uses raw IO (bytes) internally, all this totally @@ -199,10 +236,11 @@ extensions to ASCII have been labelled with character names roughly corresponding to I albeit with substitutions such as s/LATIN// and s/VULGAR// in all cases, s/CAPITAL LETTER// in some cases, and s/SMALL LETTER ([A-Z])/\l$1/ -in some other cases (the C pragma names unfortunately do -not list explicit names for the C0 or C1 control characters). The -"names" of the C1 control set (128..159 in ISO 8859-1) listed here are -somewhat arbitrary. The differences between the 0037 and 1047 sets are +in some other cases. The "names" of the controls listed here are +the Unicode Version 1 names, except for the few that don't have names, in which +case the names in the Wikipedia article were used +(L. +The differences between the 0037 and 1047 sets are flagged with ***. The differences between the 1047 and POSIX-BC sets are flagged with ###. All ord() numbers listed are decimal. If you would rather see this table listing octal values then run the table @@ -215,7 +253,7 @@ work with a pod2_other_format translation) through: =back - perl -ne 'if(/(.{33})(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/)' \ + perl -ne 'if(/(.{43})(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/)' \ -e '{printf("%s%-9o%-9o%-9o%o\n",$1,$2,$3,$4,$5)}' perlebcdic.pod If you want to retain the UTF-x code points then in script form you @@ -227,20 +265,22 @@ might want to write: =back - open(FH,") { - if (/(.{33})(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\.?(\d*)\s+(\d+)\.?(\d*)/) { - if ($7 ne '' && $9 ne '') { - printf("%s%-9o%-9o%-9o%-9o%-3o.%-5o%-3o.%o\n",$1,$2,$3,$4,$5,$6,$7,$8,$9); - } - elsif ($7 ne '') { - printf("%s%-9o%-9o%-9o%-9o%-3o.%-5o%o\n",$1,$2,$3,$4,$5,$6,$7,$8); - } - else { - printf("%s%-9o%-9o%-9o%-9o%-9o%o\n",$1,$2,$3,$4,$5,$6,$8); - } - } - } + open(FH,") { + if (/(.{43})(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\.?(\d*)\s+(\d+)\.?(\d*)/) { + if ($7 ne '' && $9 ne '') { + printf("%s%-9o%-9o%-9o%-9o%-3o.%-5o%-3o.%o\n", + $1,$2,$3,$4,$5,$6,$7,$8,$9); + } + elsif ($7 ne '') { + printf("%s%-9o%-9o%-9o%-9o%-3o.%-5o%o\n", + $1,$2,$3,$4,$5,$6,$7,$8); + } + else { + printf("%s%-9o%-9o%-9o%-9o%-9o%o\n",$1,$2,$3,$4,$5,$6,$8); + } + } + } If you would rather see this table listing hexadecimal values then run the table through: @@ -251,7 +291,7 @@ run the table through: =back - perl -ne 'if(/(.{33})(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/)' \ + perl -ne 'if(/(.{43})(\d+)\s+(\d+)\s+(\d+)\s+(\d+)/)' \ -e '{printf("%s%-9X%-9X%-9X%X\n",$1,$2,$3,$4,$5)}' perlebcdic.pod Or, in order to retain the UTF-x code points in hexadecimal: @@ -262,282 +302,283 @@ Or, in order to retain the UTF-x code points in hexadecimal: =back - open(FH,") { - if (/(.{33})(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\.?(\d*)\s+(\d+)\.?(\d*)/) { - if ($7 ne '' && $9 ne '') { - printf("%s%-9X%-9X%-9X%-9X%-2X.%-6X%-2X.%X\n",$1,$2,$3,$4,$5,$6,$7,$8,$9); - } - elsif ($7 ne '') { - printf("%s%-9X%-9X%-9X%-9X%-2X.%-6X%X\n",$1,$2,$3,$4,$5,$6,$7,$8); - } - else { - printf("%s%-9X%-9X%-9X%-9X%-9X%X\n",$1,$2,$3,$4,$5,$6,$8); - } - } - } - - - incomp- incomp- - 8859-1 lete lete - chr 0819 0037 1047 POSIX-BC UTF-8 UTF-EBCDIC - ------------------------------------------------------------------------------------ - 0 0 0 0 0 0 - 1 1 1 1 1 1 - 2 2 2 2 2 2 - 3 3 3 3 3 3 - 4 55 55 55 4 55 - 5 45 45 45 5 45 - 6 46 46 46 6 46 - 7 47 47 47 7 47 - 8 22 22 22 8 22 - 9 5 5 5 9 5 - 10 37 21 21 10 21 *** - 11 11 11 11 11 11 -
12 12 12 12 12 12 - 13 13 13 13 13 13 - 14 14 14 14 14 14 - 15 15 15 15 15 15 - 16 16 16 16 16 16 - 17 17 17 17 17 17 - 18 18 18 18 18 18 - 19 19 19 19 19 19 - 20 60 60 60 20 60 - 21 61 61 61 21 61 - 22 50 50 50 22 50 - 23 38 38 38 23 38 - 24 24 24 24 24 24 - 25 25 25 25 25 25 - 26 63 63 63 26 63 - 27 39 39 39 27 39 - 28 28 28 28 28 28 - 29 29 29 29 29 29 - 30 30 30 30 30 30 - 31 31 31 31 31 31 - 32 64 64 64 32 64 - ! 33 90 90 90 33 90 - " 34 127 127 127 34 127 - # 35 123 123 123 35 123 - $ 36 91 91 91 36 91 - % 37 108 108 108 37 108 - & 38 80 80 80 38 80 - ' 39 125 125 125 39 125 - ( 40 77 77 77 40 77 - ) 41 93 93 93 41 93 - * 42 92 92 92 42 92 - + 43 78 78 78 43 78 - , 44 107 107 107 44 107 - - 45 96 96 96 45 96 - . 46 75 75 75 46 75 - / 47 97 97 97 47 97 - 0 48 240 240 240 48 240 - 1 49 241 241 241 49 241 - 2 50 242 242 242 50 242 - 3 51 243 243 243 51 243 - 4 52 244 244 244 52 244 - 5 53 245 245 245 53 245 - 6 54 246 246 246 54 246 - 7 55 247 247 247 55 247 - 8 56 248 248 248 56 248 - 9 57 249 249 249 57 249 - : 58 122 122 122 58 122 - ; 59 94 94 94 59 94 - < 60 76 76 76 60 76 - = 61 126 126 126 61 126 - > 62 110 110 110 62 110 - ? 63 111 111 111 63 111 - @ 64 124 124 124 64 124 - A 65 193 193 193 65 193 - B 66 194 194 194 66 194 - C 67 195 195 195 67 195 - D 68 196 196 196 68 196 - E 69 197 197 197 69 197 - F 70 198 198 198 70 198 - G 71 199 199 199 71 199 - H 72 200 200 200 72 200 - I 73 201 201 201 73 201 - J 74 209 209 209 74 209 - K 75 210 210 210 75 210 - L 76 211 211 211 76 211 - M 77 212 212 212 77 212 - N 78 213 213 213 78 213 - O 79 214 214 214 79 214 - P 80 215 215 215 80 215 - Q 81 216 216 216 81 216 - R 82 217 217 217 82 217 - S 83 226 226 226 83 226 - T 84 227 227 227 84 227 - U 85 228 228 228 85 228 - V 86 229 229 229 86 229 - W 87 230 230 230 87 230 - X 88 231 231 231 88 231 - Y 89 232 232 232 89 232 - Z 90 233 233 233 90 233 - [ 91 186 173 187 91 173 *** ### - \ 92 224 224 188 92 224 ### - ] 93 187 189 189 93 189 *** - ^ 94 176 95 106 94 95 *** ### - _ 95 109 109 109 95 109 - ` 96 121 121 74 96 121 ### - a 97 129 129 129 97 129 - b 98 130 130 130 98 130 - c 99 131 131 131 99 131 - d 100 132 132 132 100 132 - e 101 133 133 133 101 133 - f 102 134 134 134 102 134 - g 103 135 135 135 103 135 - h 104 136 136 136 104 136 - i 105 137 137 137 105 137 - j 106 145 145 145 106 145 - k 107 146 146 146 107 146 - l 108 147 147 147 108 147 - m 109 148 148 148 109 148 - n 110 149 149 149 110 149 - o 111 150 150 150 111 150 - p 112 151 151 151 112 151 - q 113 152 152 152 113 152 - r 114 153 153 153 114 153 - s 115 162 162 162 115 162 - t 116 163 163 163 116 163 - u 117 164 164 164 117 164 - v 118 165 165 165 118 165 - w 119 166 166 166 119 166 - x 120 167 167 167 120 167 - y 121 168 168 168 121 168 - z 122 169 169 169 122 169 - { 123 192 192 251 123 192 ### - | 124 79 79 79 124 79 - } 125 208 208 253 125 208 ### - ~ 126 161 161 255 126 161 ### - 127 7 7 7 127 7 - 128 32 32 32 194.128 32 - 129 33 33 33 194.129 33 - 130 34 34 34 194.130 34 - 131 35 35 35 194.131 35 - 132 36 36 36 194.132 36 - 133 21 37 37 194.133 37 *** - 134 6 6 6 194.134 6 - 135 23 23 23 194.135 23 - 136 40 40 40 194.136 40 - 137 41 41 41 194.137 41 - 138 42 42 42 194.138 42 - 139 43 43 43 194.139 43 - 140 44 44 44 194.140 44 - 141 9 9 9 194.141 9 - 142 10 10 10 194.142 10 - 143 27 27 27 194.143 27 - 144 48 48 48 194.144 48 - 145 49 49 49 194.145 49 - 146 26 26 26 194.146 26 - 147 51 51 51 194.147 51 - 148 52 52 52 194.148 52 - 149 53 53 53 194.149 53 - 150 54 54 54 194.150 54 - 151 8 8 8 194.151 8 - 152 56 56 56 194.152 56 - 153 57 57 57 194.153 57 - 154 58 58 58 194.154 58 - 155 59 59 59 194.155 59 - 156 4 4 4 194.156 4 - 157 20 20 20 194.157 20 - 158 62 62 62 194.158 62 - 159 255 255 95 194.159 255 ### - 160 65 65 65 194.160 128.65 - 161 170 170 170 194.161 128.66 - 162 74 74 176 194.162 128.67 ### - 163 177 177 177 194.163 128.68 - 164 159 159 159 194.164 128.69 - 165 178 178 178 194.165 128.70 - 166 106 106 208 194.166 128.71 ### -
167 181 181 181 194.167 128.72 - 168 189 187 121 194.168 128.73 *** ### - 169 180 180 180 194.169 128.74 - 170 154 154 154 194.170 128.81 - 171 138 138 138 194.171 128.82 - 172 95 176 186 194.172 128.83 *** ### - 173 202 202 202 194.173 128.84 - 174 175 175 175 194.174 128.85 - 175 188 188 161 194.175 128.86 ### - 176 144 144 144 194.176 128.87 - 177 143 143 143 194.177 128.88 - 178 234 234 234 194.178 128.89 - 179 250 250 250 194.179 128.98 - 180 190 190 190 194.180 128.99 - 181 160 160 160 194.181 128.100 - 182 182 182 182 194.182 128.101 - 183 179 179 179 194.183 128.102 - 184 157 157 157 194.184 128.103 - 185 218 218 218 194.185 128.104 - 186 155 155 155 194.186 128.105 - 187 139 139 139 194.187 128.106 - 188 183 183 183 194.188 128.112 - 189 184 184 184 194.189 128.113 - 190 185 185 185 194.190 128.114 - 191 171 171 171 194.191 128.115 - 192 100 100 100 195.128 138.65 - 193 101 101 101 195.129 138.66 - 194 98 98 98 195.130 138.67 - 195 102 102 102 195.131 138.68 - 196 99 99 99 195.132 138.69 - 197 103 103 103 195.133 138.70 - 198 158 158 158 195.134 138.71 - 199 104 104 104 195.135 138.72 - 200 116 116 116 195.136 138.73 - 201 113 113 113 195.137 138.74 - 202 114 114 114 195.138 138.81 - 203 115 115 115 195.139 138.82 - 204 120 120 120 195.140 138.83 - 205 117 117 117 195.141 138.84 - 206 118 118 118 195.142 138.85 - 207 119 119 119 195.143 138.86 - 208 172 172 172 195.144 138.87 - 209 105 105 105 195.145 138.88 - 210 237 237 237 195.146 138.89 - 211 238 238 238 195.147 138.98 - 212 235 235 235 195.148 138.99 - 213 239 239 239 195.149 138.100 - 214 236 236 236 195.150 138.101 - 215 191 191 191 195.151 138.102 - 216 128 128 128 195.152 138.103 - 217 253 253 224 195.153 138.104 ### - 218 254 254 254 195.154 138.105 - 219 251 251 221 195.155 138.106 ### - 220 252 252 252 195.156 138.112 - 221 173 186 173 195.157 138.113 *** ### - 222 174 174 174 195.158 138.114 - 223 89 89 89 195.159 138.115 - 224 68 68 68 195.160 139.65 - 225 69 69 69 195.161 139.66 - 226 66 66 66 195.162 139.67 - 227 70 70 70 195.163 139.68 - 228 67 67 67 195.164 139.69 - 229 71 71 71 195.165 139.70 - 230 156 156 156 195.166 139.71 - 231 72 72 72 195.167 139.72 - 232 84 84 84 195.168 139.73 - 233 81 81 81 195.169 139.74 - 234 82 82 82 195.170 139.81 - 235 83 83 83 195.171 139.82 - 236 88 88 88 195.172 139.83 - 237 85 85 85 195.173 139.84 - 238 86 86 86 195.174 139.85 - 239 87 87 87 195.175 139.86 - 240 140 140 140 195.176 139.87 - 241 73 73 73 195.177 139.88 - 242 205 205 205 195.178 139.89 - 243 206 206 206 195.179 139.98 - 244 203 203 203 195.180 139.99 - 245 207 207 207 195.181 139.100 - 246 204 204 204 195.182 139.101 - 247 225 225 225 195.183 139.102 - 248 112 112 112 195.184 139.103 - 249 221 221 192 195.185 139.104 ### - 250 222 222 222 195.186 139.105 - 251 219 219 219 195.187 139.106 - 252 220 220 220 195.188 139.112 - 253 141 141 141 195.189 139.113 - 254 142 142 142 195.190 139.114 - 255 223 223 223 195.191 139.115 + open(FH,") { + if (/(.{43})(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\s+(\d+)\.?(\d*)\s+(\d+)\.?(\d*)/) { + if ($7 ne '' && $9 ne '') { + printf("%s%-9X%-9X%-9X%-9X%-2X.%-6X%-2X.%X\n", + $1,$2,$3,$4,$5,$6,$7,$8,$9); + } + elsif ($7 ne '') { + printf("%s%-9X%-9X%-9X%-9X%-2X.%-6X%X\n", + $1,$2,$3,$4,$5,$6,$7,$8); + } + else { + printf("%s%-9X%-9X%-9X%-9X%-9X%X\n",$1,$2,$3,$4,$5,$6,$8); + } + } + } + + + ISO 8859-1 CCSID CCSID CCSID 1047 + chr CCSID 0819 0037 1047 POSIX-BC UTF-8 UTF-EBCDIC + ---------------------------------------------------------------------------------------------- + 0 0 0 0 0 0 + 1 1 1 1 1 1 + 2 2 2 2 2 2 + 3 3 3 3 3 3 + 4 55 55 55 4 55 + 5 45 45 45 5 45 + 6 46 46 46 6 46 + 7 47 47 47 7 47 + 8 22 22 22 8 22 + 9 5 5 5 9 5 + 10 37 21 21 10 21 *** + 11 11 11 11 11 11 + 12 12 12 12 12 12 + 13 13 13 13 13 13 + 14 14 14 14 14 14 + 15 15 15 15 15 15 + 16 16 16 16 16 16 + 17 17 17 17 17 17 + 18 18 18 18 18 18 + 19 19 19 19 19 19 + 20 60 60 60 20 60 + 21 61 61 61 21 61 + 22 50 50 50 22 50 + 23 38 38 38 23 38 + 24 24 24 24 24 24 + 25 25 25 25 25 25 + 26 63 63 63 26 63 + 27 39 39 39 27 39 + 28 28 28 28 28 28 + 29 29 29 29 29 29 + 30 30 30 30 30 30 + 31 31 31 31 31 31 + 32 64 64 64 32 64 + ! 33 90 90 90 33 90 + " 34 127 127 127 34 127 + # 35 123 123 123 35 123 + $ 36 91 91 91 36 91 + % 37 108 108 108 37 108 + & 38 80 80 80 38 80 + ' 39 125 125 125 39 125 + ( 40 77 77 77 40 77 + ) 41 93 93 93 41 93 + * 42 92 92 92 42 92 + + 43 78 78 78 43 78 + , 44 107 107 107 44 107 + - 45 96 96 96 45 96 + . 46 75 75 75 46 75 + / 47 97 97 97 47 97 + 0 48 240 240 240 48 240 + 1 49 241 241 241 49 241 + 2 50 242 242 242 50 242 + 3 51 243 243 243 51 243 + 4 52 244 244 244 52 244 + 5 53 245 245 245 53 245 + 6 54 246 246 246 54 246 + 7 55 247 247 247 55 247 + 8 56 248 248 248 56 248 + 9 57 249 249 249 57 249 + : 58 122 122 122 58 122 + ; 59 94 94 94 59 94 + < 60 76 76 76 60 76 + = 61 126 126 126 61 126 + > 62 110 110 110 62 110 + ? 63 111 111 111 63 111 + @ 64 124 124 124 64 124 + A 65 193 193 193 65 193 + B 66 194 194 194 66 194 + C 67 195 195 195 67 195 + D 68 196 196 196 68 196 + E 69 197 197 197 69 197 + F 70 198 198 198 70 198 + G 71 199 199 199 71 199 + H 72 200 200 200 72 200 + I 73 201 201 201 73 201 + J 74 209 209 209 74 209 + K 75 210 210 210 75 210 + L 76 211 211 211 76 211 + M 77 212 212 212 77 212 + N 78 213 213 213 78 213 + O 79 214 214 214 79 214 + P 80 215 215 215 80 215 + Q 81 216 216 216 81 216 + R 82 217 217 217 82 217 + S 83 226 226 226 83 226 + T 84 227 227 227 84 227 + U 85 228 228 228 85 228 + V 86 229 229 229 86 229 + W 87 230 230 230 87 230 + X 88 231 231 231 88 231 + Y 89 232 232 232 89 232 + Z 90 233 233 233 90 233 + [ 91 186 173 187 91 173 *** ### + \ 92 224 224 188 92 224 ### + ] 93 187 189 189 93 189 *** + ^ 94 176 95 106 94 95 *** ### + _ 95 109 109 109 95 109 + ` 96 121 121 74 96 121 ### + a 97 129 129 129 97 129 + b 98 130 130 130 98 130 + c 99 131 131 131 99 131 + d 100 132 132 132 100 132 + e 101 133 133 133 101 133 + f 102 134 134 134 102 134 + g 103 135 135 135 103 135 + h 104 136 136 136 104 136 + i 105 137 137 137 105 137 + j 106 145 145 145 106 145 + k 107 146 146 146 107 146 + l 108 147 147 147 108 147 + m 109 148 148 148 109 148 + n 110 149 149 149 110 149 + o 111 150 150 150 111 150 + p 112 151 151 151 112 151 + q 113 152 152 152 113 152 + r 114 153 153 153 114 153 + s 115 162 162 162 115 162 + t 116 163 163 163 116 163 + u 117 164 164 164 117 164 + v 118 165 165 165 118 165 + w 119 166 166 166 119 166 + x 120 167 167 167 120 167 + y 121 168 168 168 121 168 + z 122 169 169 169 122 169 + { 123 192 192 251 123 192 ### + | 124 79 79 79 124 79 + } 125 208 208 253 125 208 ### + ~ 126 161 161 255 126 161 ### + 127 7 7 7 127 7 + 128 32 32 32 194.128 32 + 129 33 33 33 194.129 33 + 130 34 34 34 194.130 34 + 131 35 35 35 194.131 35 + 132 36 36 36 194.132 36 + 133 21 37 37 194.133 37 *** + 134 6 6 6 194.134 6 + 135 23 23 23 194.135 23 + 136 40 40 40 194.136 40 + 137 41 41 41 194.137 41 + 138 42 42 42 194.138 42 + 139 43 43 43 194.139 43 + 140 44 44 44 194.140 44 + 141 9 9 9 194.141 9 + 142 10 10 10 194.142 10 + 143 27 27 27 194.143 27 + 144 48 48 48 194.144 48 + 145 49 49 49 194.145 49 + 146 26 26 26 194.146 26 + 147 51 51 51 194.147 51 + 148 52 52 52 194.148 52 + 149 53 53 53 194.149 53 + 150 54 54 54 194.150 54 + 151 8 8 8 194.151 8 + 152 56 56 56 194.152 56 + 153 57 57 57 194.153 57 + 154 58 58 58 194.154 58 + 155 59 59 59 194.155 59 + 156 4 4 4 194.156 4 + 157 20 20 20 194.157 20 + 158 62 62 62 194.158 62 + 159 255 255 95 194.159 255 ### + 160 65 65 65 194.160 128.65 + 161 170 170 170 194.161 128.66 + 162 74 74 176 194.162 128.67 ### + 163 177 177 177 194.163 128.68 + 164 159 159 159 194.164 128.69 + 165 178 178 178 194.165 128.70 + 166 106 106 208 194.166 128.71 ### +
167 181 181 181 194.167 128.72 + 168 189 187 121 194.168 128.73 *** ### + 169 180 180 180 194.169 128.74 + 170 154 154 154 194.170 128.81 + 171 138 138 138 194.171 128.82 + 172 95 176 186 194.172 128.83 *** ### + 173 202 202 202 194.173 128.84 + 174 175 175 175 194.174 128.85 + 175 188 188 161 194.175 128.86 ### + 176 144 144 144 194.176 128.87 + 177 143 143 143 194.177 128.88 + 178 234 234 234 194.178 128.89 + 179 250 250 250 194.179 128.98 + 180 190 190 190 194.180 128.99 + 181 160 160 160 194.181 128.100 + 182 182 182 182 194.182 128.101 + 183 179 179 179 194.183 128.102 + 184 157 157 157 194.184 128.103 + 185 218 218 218 194.185 128.104 + 186 155 155 155 194.186 128.105 + 187 139 139 139 194.187 128.106 + 188 183 183 183 194.188 128.112 + 189 184 184 184 194.189 128.113 + 190 185 185 185 194.190 128.114 + 191 171 171 171 194.191 128.115 + 192 100 100 100 195.128 138.65 + 193 101 101 101 195.129 138.66 + 194 98 98 98 195.130 138.67 + 195 102 102 102 195.131 138.68 + 196 99 99 99 195.132 138.69 + 197 103 103 103 195.133 138.70 + 198 158 158 158 195.134 138.71 + 199 104 104 104 195.135 138.72 + 200 116 116 116 195.136 138.73 + 201 113 113 113 195.137 138.74 + 202 114 114 114 195.138 138.81 + 203 115 115 115 195.139 138.82 + 204 120 120 120 195.140 138.83 + 205 117 117 117 195.141 138.84 + 206 118 118 118 195.142 138.85 + 207 119 119 119 195.143 138.86 + 208 172 172 172 195.144 138.87 + 209 105 105 105 195.145 138.88 + 210 237 237 237 195.146 138.89 + 211 238 238 238 195.147 138.98 + 212 235 235 235 195.148 138.99 + 213 239 239 239 195.149 138.100 + 214 236 236 236 195.150 138.101 + 215 191 191 191 195.151 138.102 + 216 128 128 128 195.152 138.103 + 217 253 253 224 195.153 138.104 ### + 218 254 254 254 195.154 138.105 + 219 251 251 221 195.155 138.106 ### + 220 252 252 252 195.156 138.112 + 221 173 186 173 195.157 138.113 *** ### + 222 174 174 174 195.158 138.114 + 223 89 89 89 195.159 138.115 + 224 68 68 68 195.160 139.65 + 225 69 69 69 195.161 139.66 + 226 66 66 66 195.162 139.67 + 227 70 70 70 195.163 139.68 + 228 67 67 67 195.164 139.69 + 229 71 71 71 195.165 139.70 + 230 156 156 156 195.166 139.71 + 231 72 72 72 195.167 139.72 + 232 84 84 84 195.168 139.73 + 233 81 81 81 195.169 139.74 + 234 82 82 82 195.170 139.81 + 235 83 83 83 195.171 139.82 + 236 88 88 88 195.172 139.83 + 237 85 85 85 195.173 139.84 + 238 86 86 86 195.174 139.85 + 239 87 87 87 195.175 139.86 + 240 140 140 140 195.176 139.87 + 241 73 73 73 195.177 139.88 + 242 205 205 205 195.178 139.89 + 243 206 206 206 195.179 139.98 + 244 203 203 203 195.180 139.99 + 245 207 207 207 195.181 139.100 + 246 204 204 204 195.182 139.101 + 247 225 225 225 195.183 139.102 + 248 112 112 112 195.184 139.103 + 249 221 221 192 195.185 139.104 ### + 250 222 222 222 195.186 139.105 + 251 219 219 219 195.187 139.106 + 252 220 220 220 195.188 139.112 + 253 141 141 141 195.189 139.113 + 254 142 142 142 195.190 139.114 + 255 223 223 223 195.191 139.115 If you would rather see the above table in CCSID 0037 order rather than ASCII + Latin-1 order then run the table through: @@ -548,14 +589,14 @@ ASCII + Latin-1 order then run the table through: =back - perl -ne 'if(/.{33}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}/)'\ + perl -ne 'if(/.{43}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}/)'\ -e '{push(@l,$_)}' \ -e 'END{print map{$_->[0]}' \ -e ' sort{$a->[1] <=> $b->[1]}' \ - -e ' map{[$_,substr($_,42,3)]}@l;}' perlebcdic.pod + -e ' map{[$_,substr($_,52,3)]}@l;}' perlebcdic.pod -If you would rather see it in CCSID 1047 order then change the digit -42 in the last line to 51, like this: +If you would rather see it in CCSID 1047 order then change the number +52 in the last line to 61, like this: =over 4 @@ -563,14 +604,14 @@ If you would rather see it in CCSID 1047 order then change the digit =back - perl -ne 'if(/.{33}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}/)'\ + perl -ne 'if(/.{43}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}/)'\ -e '{push(@l,$_)}' \ -e 'END{print map{$_->[0]}' \ -e ' sort{$a->[1] <=> $b->[1]}' \ - -e ' map{[$_,substr($_,51,3)]}@l;}' perlebcdic.pod + -e ' map{[$_,substr($_,61,3)]}@l;}' perlebcdic.pod -If you would rather see it in POSIX-BC order then change the digit -51 in the last line to 60, like this: +If you would rather see it in POSIX-BC order then change the number +61 in the last line to 70, like this: =over 4 @@ -578,11 +619,11 @@ If you would rather see it in POSIX-BC order then change the digit =back - perl -ne 'if(/.{33}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}/)'\ + perl -ne 'if(/.{43}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}\s{6,8}\d{1,3}/)'\ -e '{push(@l,$_)}' \ -e 'END{print map{$_->[0]}' \ -e ' sort{$a->[1] <=> $b->[1]}' \ - -e ' map{[$_,substr($_,60,3)]}@l;}' perlebcdic.pod + -e ' map{[$_,substr($_,70,3)]}@l;}' perlebcdic.pod =head1 IDENTIFYING CHARACTER CODE SETS @@ -618,11 +659,11 @@ However, it would be unwise to write tests such as: $is_ascii = "\r" ne chr(13); # WRONG $is_ascii = "\n" ne chr(10); # ILL ADVISED -Obviously the first of these will fail to distinguish most ASCII machines -from either a CCSID 0037, a 1047, or a POSIX-BC EBCDIC machine since "\r" eq +Obviously the first of these will fail to distinguish most ASCII platforms +from either a CCSID 0037, a 1047, or a POSIX-BC EBCDIC platform since "\r" eq chr(13) under all of those coded character sets. But note too that because "\n" is chr(13) and "\r" is chr(10) on the MacIntosh (which is an -ASCII machine) the second C<$is_ascii> test will lead to trouble there. +ASCII platform) the second C<$is_ascii> test will lead to trouble there. To determine whether or not perl was built under an EBCDIC code page you can use the Config module like so: @@ -664,13 +705,13 @@ it in tr/// like so: '\060\061\062\063\064\065\066\067\070\071\263\333\334\331\332\237' ; my $ebcdic_string = $ascii_string; - eval '$ebcdic_string =~ tr/\000-\377/' . $cp_037 . '/'; + eval '$ebcdic_string =~ tr/' . $cp_037 . '/\000-\377/'; -To convert from EBCDIC 037 to ASCII just reverse the order of the tr/// +To convert from EBCDIC 037 to ASCII just reverse the order of the tr/// arguments like so: my $ascii_string = $ebcdic_string; - eval '$ascii_string = tr/' . $cp_037 . '/\000-\377/'; + eval '$ascii_string =~ tr/\000-\377/' . $cp_037 . '/'; Similarly one could take the output of the third column from recipe 0 to obtain a C<$cp_1047> table. The fourth column of the output from recipe @@ -702,15 +743,15 @@ The OS/390 and z/OS C run time libraries provide _atoe() and _etoa() functions. =head1 OPERATOR DIFFERENCES The C<..> range operator treats certain character ranges with -care on EBCDIC machines. For example the following array -will have twenty six elements on either an EBCDIC machine -or an ASCII machine: +care on EBCDIC platforms. For example the following array +will have twenty six elements on either an EBCDIC platform +or an ASCII platform: @alphabet = ('A'..'Z'); # $#alphabet == 25 The bitwise operators such as & ^ | may return different results when operating on string or character data in a perl program running -on an EBCDIC machine than when run on an ASCII machine. Here is +on an EBCDIC platform than when run on an ASCII platform. Here is an example adapted from the one in L: # EBCDIC-based examples @@ -721,58 +762,55 @@ an example adapted from the one in L: An interesting property of the 32 C0 control characters in the ASCII table is that they can "literally" be constructed -as control characters in perl, e.g. C<(chr(0) eq "\c@")> -C<(chr(1) eq "\cA")>, and so on. Perl on EBCDIC machines has been -ported to take "\c@" to chr(0) and "\cA" to chr(1) as well, but the +as control characters in perl, e.g. C<(chr(0)> eq C<\c@>)> +C<(chr(1)> eq C<\cA>)>, and so on. Perl on EBCDIC platforms has been +ported to take C<\c@> to chr(0) and C<\cA> to chr(1), etc. as well, but the thirty three characters that result depend on which code page you are -using. The table below uses the character names from the previous table -but with substitutions such as s/START OF/S.O./; s/END OF /E.O./; -s/TRANSMISSION/TRANS./; s/TABULATION/TAB./; s/VERTICAL/VERT./; -s/HORIZONTAL/HORIZ./; s/DEVICE CONTROL/D.C./; s/SEPARATOR/SEP./; -s/NEGATIVE ACKNOWLEDGE/NEG. ACK./;. The POSIX-BC and 1047 sets are +using. The table below uses the standard acronyms for the controls. +The POSIX-BC and 1047 sets are identical throughout this range and differ from the 0037 set at only one spot (21 decimal). Note that the C character -may be generated by "\cJ" on ASCII machines but by "\cU" on 1047 or POSIX-BC -machines and cannot be generated as a C<"\c.letter."> control character on -0037 machines. Note also that "\c\\" maps to two characters -not one. - - chr ord 8859-1 0037 1047 && POSIX-BC - ------------------------------------------------------------------------ - "\c?" 127 " " ***>< - "\c@" 0 ***>< - "\cA" 1 - "\cB" 2 - "\cC" 3 - "\cD" 4 - "\cE" 5 - "\cF" 6 - "\cG" 7 - "\cH" 8 - "\cI" 9 - "\cJ" 10 - "\cK" 11 - "\cL" 12 - "\cM" 13 - "\cN" 14 - "\cO" 15 - "\cP" 16 - "\cQ" 17 - "\cR" 18 - "\cS" 19 - "\cT" 20 - "\cU" 21 *** - "\cV" 22 - "\cW" 23 - "\cX" 24 - "\cY" 25 - "\cZ" 26 - "\c[" 27 - "\c\\" 28 \ \ \ - "\c]" 29 - "\c^" 30 ***>< - "\c_" 31 ***>< - +may be generated by C<\cJ> on ASCII platforms but by C<\cU> on 1047 or POSIX-BC +platforms and cannot be generated as a C<"\c.letter."> control character on +0037 platforms. Note also that C<\c\> cannot be the final element in a string +or regex, as it will absorb the terminator. But C<\c\I> is a C concatenated with I for all I. + + chr ord 8859-1 0037 1047 && POSIX-BC + ----------------------------------------------------------------------- + \c? 127 " " + \c@ 0 + \cA 1 + \cB 2 + \cC 3 + \cD 4 + \cE 5 + \cF 6 + \cG 7 + \cH 8 + \cI 9 + \cJ 10 + \cK 11 + \cL 12 + \cM 13 + \cN 14 + \cO 15 + \cP 16 + \cQ 17 + \cR 18 + \cS 19 + \cT 20 + \cU 21 *** + \cV 22 + \cW 23 + \cX 24 + \cY 25 + \cZ 26 + \c[ 27 + \c\X 28 X X X + \c] 29 + \c^ 30 + \c_ 31 =head1 FUNCTION DIFFERENCES @@ -781,13 +819,13 @@ not one. =item chr() chr() must be given an EBCDIC code number argument to yield a desired -character return value on an EBCDIC machine. For example: +character return value on an EBCDIC platform. For example: $CAPITAL_LETTER_A = chr(193); =item ord() -ord() will return EBCDIC code number values on an EBCDIC machine. +ord() will return EBCDIC code number values on an EBCDIC platform. For example: $the_number_193 = ord("A"); @@ -830,7 +868,7 @@ further details. The formats that can convert characters to numbers and vice versa will be different from their ASCII counterparts when executed -on an EBCDIC machine. Examples include: +on an EBCDIC platform. Examples include: printf("%c%c%c",193,194,195); # prints ABC @@ -866,7 +904,7 @@ is a gap character from the alphabetic viewpoint. If you do want to match the alphabet gap characters in a single octet regular expression try matching the hex or octal code such -as C on EBCDIC or C on ASCII machines to +as C on EBCDIC or C on ASCII platforms to have your regular expression match C. Another construct to be wary of is the inappropriate use of hex or @@ -900,7 +938,7 @@ set of subs: The above would be adequate if the concern was only with numeric code points. However, the concern may be with characters rather than code points -and on an EBCDIC machine it may be desirable for constructs such as +and on an EBCDIC platform it may be desirable for constructs such as C to print out the expected message. One way to represent the above collection of character classification subs that is capable of working across the @@ -911,7 +949,7 @@ four coded character sets discussed in this document is as follows: if (ord('^')==94) { # ascii return $char =~ /[\000-\037]/; } - if (ord('^')==176) { # 37 + if (ord('^')==176) { # 0037 return $char =~ /[\000-\003\067\055-\057\026\005\045\013-\023\074\075\062\046\030\031\077\047\034-\037]/; } if (ord('^')==95 || ord('^')==106) { # 1047 || posix-bc @@ -939,7 +977,7 @@ four coded character sets discussed in this document is as follows: if (ord('^')==94) { # ascii return $char =~ /[\200-\237]/; } - if (ord('^')==176) { # 37 + if (ord('^')==176) { # 0037 return $char =~ /[\040-\044\025\006\027\050-\054\011\012\033\060\061\032\063-\066\010\070-\073\040\024\076\377]/; } if (ord('^')==95) { # 1047 @@ -956,7 +994,7 @@ four coded character sets discussed in this document is as follows: if (ord('^')==94) { # ascii return $char =~ /[\240-\377]/; } - if (ord('^')==176) { # 37 + if (ord('^')==176) { # 0037 return $char =~ /[\101\252\112\261\237\262\152\265\275\264\232\212\137\312\257\274\220\217\352\372\276\240\266\263\235\332\233\213\267\270\271\253\144\145\142\146\143\147\236\150\164\161-\163\170\165-\167\254\151\355\356\353\357\354\277\200\375\376\373\374\255\256\131\104\105\102\106\103\107\234\110\124\121-\123\130\125-\127\214\111\315\316\313\317\314\341\160\335\336\333\334\215\216\337]/; } @@ -976,7 +1014,7 @@ to use the characters in the range explicitly: sub Is_latin_1 { my $char = substr(shift,0,1); - $char =~ /[ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ]/; + $char =~ /[ ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ]/; } Although that form may run into trouble in network transit (due to the @@ -994,25 +1032,25 @@ output. One big difference between ASCII based character sets and EBCDIC ones are the relative positions of upper and lower case letters and the -letters compared to the digits. If sorted on an ASCII based machine the +letters compared to the digits. If sorted on an ASCII based platform the two letter abbreviation for a physician comes before the two letter for drive, that is: - @sorted = sort(qw(Dr. dr.)); # @sorted holds ('Dr.','dr.') on ASCII, + @sorted = sort(qw(Dr. dr.)); # @sorted holds ('Dr.','dr.') on ASCII, # but ('dr.','Dr.') on EBCDIC The property of lower case before uppercase letters in EBCDIC is even carried to the Latin 1 EBCDIC pages such as 0037 and 1047. An example would be that E C (203) comes -before E C (235) on an ASCII machine, but -the latter (83) comes before the former (115) on an EBCDIC machine. +before E C (235) on an ASCII platform, but +the latter (83) comes before the former (115) on an EBCDIC platform. (Astute readers will note that the upper case version of E C is simply "SS" and that the upper case version of E C is not in the 0..255 range but it is at U+x0178 in Unicode, or C<"\x{178}"> in a Unicode enabled Perl). The sort order will cause differences between results obtained on -ASCII machines versus EBCDIC machines. What follows are some suggestions +ASCII platforms versus EBCDIC platforms. What follows are some suggestions on how to deal with these differences. =head2 Ignore ASCII vs. EBCDIC sort differences. @@ -1029,13 +1067,13 @@ then sort(). If the data are primarily lowercase non Latin 1 then apply tr/[A-Z]/[a-z]/ before sorting. If the data are primarily UPPERCASE and include Latin-1 characters then apply: - tr/[a-z]/[A-Z]/; - tr/[àáâãäåæçèéêëìíîïðñòóôõöøùúûüýþ]/[ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞ]/; - s/ß/SS/g; + tr/[a-z]/[A-Z]/; + tr/[àáâãäåæçèéêëìíîïðñòóôõöøùúûüýþ]/[ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖØÙÚÛÜÝÞ/; + s/ß/SS/g; then sort(). Do note however that such Latin-1 manipulation does not address the E C character that will remain at -code point 255 on ASCII machines, but 223 on most EBCDIC machines +code point 255 on ASCII platforms, but 223 on most EBCDIC platforms where it will sort to a place less than the EBCDIC numerals. With a Unicode enabled Perl you might try: @@ -1049,7 +1087,7 @@ of the data and may not be acceptable for that reason. This is the most expensive proposition that does not employ a network connection. -=head2 Perform sorting on one type of machine only. +=head2 Perform sorting on one type of platform only. This strategy can employ a network connection. As such it would be computationally expensive. @@ -1180,13 +1218,13 @@ that the @e2a array is filled in appropriately: =head2 Quoted-Printable encoding and decoding -On ASCII encoded machines it is possible to strip characters outside of +On ASCII encoded platforms it is possible to strip characters outside of the printable set using: # This QP encoder works on ASCII only $qp_string =~ s/([=\x00-\x1F\x80-\xFF])/sprintf("=%02X",ord($1))/ge; -Whereas a QP encoder that works on both ASCII and EBCDIC machines +Whereas a QP encoder that works on both ASCII and EBCDIC platforms would look somewhat like the following (where the EBCDIC branch @e2a array is omitted for brevity): @@ -1211,7 +1249,7 @@ Such QP strings can be decoded with: $string =~ s/=([0-9A-Fa-f][0-9A-Fa-f])/chr hex $1/ge; $string =~ s/=[\n\r]+$//; -Whereas a QP decoder that works on both ASCII and EBCDIC machines +Whereas a QP decoder that works on both ASCII and EBCDIC platforms would look somewhat like the following (where the @a2e array is omitted for brevity): @@ -1229,7 +1267,7 @@ on the 26 letter English version of the Latin alphabet. Rot13 has the interesting property that alternate subsequent invocations are identity maps (thus rot13 is its own non-trivial inverse in the group of 26 alphabet rotations). Hence the following is a rot13 encoder and decoder that will -work on ASCII and EBCDIC machines: +work on ASCII and EBCDIC platforms: #!/usr/local/bin/perl @@ -1247,13 +1285,13 @@ In one-liner form: To the extent that it is possible to write code that depends on hashing order there may be differences between hashes as stored -on an ASCII based machine and hashes stored on an EBCDIC based machine. +on an ASCII based platform and hashes stored on an EBCDIC based platform. XXX =head1 I18N AND L10N Internationalization(I18N) and localization(L10N) are supported at least -in principle even on EBCDIC machines. The details are system dependent +in principle even on EBCDIC platforms. The details are system dependent and discussed under the L section below. =head1 MULTI OCTET CHARACTER SETS @@ -1349,13 +1387,13 @@ L, L, L, L. =head1 REFERENCES -http://anubis.dkuug.dk/i18n/charmaps +L -http://www.unicode.org/ +L -http://www.unicode.org/unicode/reports/tr16/ +L -http://www.wps.com/texts/codes/ +L B Tom Jennings, September 1999. @@ -1373,7 +1411,7 @@ B Fred B. Wrixon, ISBN 1-57912-040-7, Black Dog & Leventhal Publishers, 1998. -http://www.bobbemer.com/P-BIT.HTM +L B Robert Bemer. =head1 HISTORY @@ -1390,5 +1428,3 @@ Thanks also to Vickie Cooper, Philip Newton, William Raffloer, and Joe Smith. Trademarks, registered trademarks, service marks and registered service marks used in this document are the property of their respective owners. - -