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bangbang.c
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bangbang.c
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/* Conversion of files between different charsets and surfaces.
Copyright © 1990-2018 Free Software Foundation, Inc.
Contributed by François Pinard <[email protected]>, 1988.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License
as published by the Free Software Foundation; either version 3 of the
License, or (at your option) any later version.
This library is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty
of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the Recode Library; see the file `COPYING.LIB'.
If not, see <https://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "common.h"
#include "decsteps.h"
static const char *const translation_table[256] =
{
"!!@", /* 0 */
"!!a", /* 1 */
"!!b", /* 2 */
"!!c", /* 3 */
"!!d", /* 4 */
"!!e", /* 5 */
"!!f", /* 6 */
"!!g", /* 7 */
"!!h", /* 8 */
"!!i", /* 9 */
"\n", /* 10, would have been "!!j" */
"!!k", /* 11 */
"!!l", /* 12 */
"!!m", /* 13 */
"!!n", /* 14 */
"!!o", /* 15 */
"!!p", /* 16 */
"!!q", /* 17 */
"!!r", /* 18 */
"!!s", /* 19 */
"!!t", /* 20 */
"!!u", /* 21 */
"!!v", /* 22 */
"!!w", /* 23 */
"!!x", /* 24 */
"!!y", /* 25 */
"!!z", /* 26 */
"!![", /* 27 */
"!!\\", /* 28 */
"!!]", /* 29 */
"!!^", /* 30 */
"!!_", /* 31 */
" ", /* 32 */
"!\"", /* 33 */
"\"", /* 34 */
"#", /* 35 */
"$", /* 36 */
"%", /* 37 */
"&", /* 38 */
"'", /* 39 */
"(", /* 40 */
")", /* 41 */
"*", /* 42 */
"+", /* 43 */
",", /* 44 */
"-", /* 45 */
".", /* 46 */
"/", /* 47 */
"0", /* 48 */
"1", /* 49 */
"2", /* 50 */
"3", /* 51 */
"4", /* 52 */
"5", /* 53 */
"6", /* 54 */
"7", /* 55 */
"8", /* 56 */
"9", /* 57 */
":", /* 58 */
";", /* 59 */
"<", /* 60 */
"=", /* 61 */
">", /* 62 */
"?", /* 63 */
"@", /* 64 */
"!a", /* 65 */
"!b", /* 66 */
"!c", /* 67 */
"!d", /* 68 */
"!e", /* 69 */
"!f", /* 70 */
"!g", /* 71 */
"!h", /* 72 */
"!i", /* 73 */
"!j", /* 74 */
"!k", /* 75 */
"!l", /* 76 */
"!m", /* 77 */
"!n", /* 78 */
"!o", /* 79 */
"!p", /* 80 */
"!q", /* 81 */
"!r", /* 82 */
"!s", /* 83 */
"!t", /* 84 */
"!u", /* 85 */
"!v", /* 86 */
"!w", /* 87 */
"!x", /* 88 */
"!y", /* 89 */
"!z", /* 90 */
"[", /* 91 */
"\\", /* 92 */
"]", /* 93 */
"^", /* 94 */
"_", /* 95 */
"!@", /* 96 */
"a", /* 97 */
"b", /* 98 */
"c", /* 99 */
"d", /* 100 */
"e", /* 101 */
"f", /* 102 */
"g", /* 103 */
"h", /* 104 */
"i", /* 105 */
"j", /* 106 */
"k", /* 107 */
"l", /* 108 */
"m", /* 109 */
"n", /* 110 */
"o", /* 111 */
"p", /* 112 */
"q", /* 113 */
"r", /* 114 */
"s", /* 115 */
"t", /* 116 */
"u", /* 117 */
"v", /* 118 */
"w", /* 119 */
"x", /* 120 */
"y", /* 121 */
"z", /* 122 */
"![", /* 123 */
"!\\", /* 124 */
"!]", /* 125 */
"!^", /* 126 */
"!_", /* 127 */
NULL, /* 128 */
NULL, /* 129 */
NULL, /* 130 */
NULL, /* 131 */
NULL, /* 132 */
NULL, /* 133 */
NULL, /* 134 */
NULL, /* 135 */
NULL, /* 136 */
NULL, /* 137 */
NULL, /* 138 */
NULL, /* 139 */
NULL, /* 140 */
NULL, /* 141 */
NULL, /* 142 */
NULL, /* 143 */
NULL, /* 144 */
NULL, /* 145 */
NULL, /* 146 */
NULL, /* 147 */
NULL, /* 148 */
NULL, /* 149 */
NULL, /* 150 */
NULL, /* 151 */
NULL, /* 152 */
NULL, /* 153 */
NULL, /* 154 */
NULL, /* 155 */
NULL, /* 156 */
NULL, /* 157 */
NULL, /* 158 */
NULL, /* 159 */
" ", /* 160 no-break space */
NULL, /* 161 inverted exclamation mark */
NULL, /* 162 cent sign */
NULL, /* 163 pound sign */
NULL, /* 164 currency sign */
NULL, /* 165 yen sign */
NULL, /* 166 broken bar */
NULL, /* 167 paragraph sign, section sign */
NULL, /* 168 diaeresis */
NULL, /* 169 copyright sign */
NULL, /* 170 feminine ordinal indicator */
"!>", /* 171 left angle quotation mark */
NULL, /* 172 not sign */
NULL, /* 173 soft hyphen */
NULL, /* 174 registered trade mark sign */
NULL, /* 175 macron */
NULL, /* 176 degree sign */
NULL, /* 177 plus-minus sign */
NULL, /* 178 superscript two */
NULL, /* 179 superscript three */
NULL, /* 180 acute accent */
NULL, /* 181 small greek mu, micro sign */
NULL, /* 182 pilcrow sign */
NULL, /* 183 middle dot */
NULL, /* 184 cedilla */
NULL, /* 185 superscript one */
NULL, /* 186 masculine ordinal indicator */
"!?", /* 187 right angle quotation mark */
NULL, /* 188 vulgar fraction one quarter */
NULL, /* 189 vulgar fraction one half */
NULL, /* 190 vulgar fraction three quarters */
NULL, /* 191 inverted question mark */
NULL, /* 192 capital A with grave accent */
NULL, /* 193 capital A with acute accent */
NULL, /* 194 capital A with circumflex accent */
NULL, /* 195 capital A with tilde */
NULL, /* 196 capital A diaeresis */
NULL, /* 197 capital A with ring above */
NULL, /* 198 capital diphthong A with E */
NULL, /* 199 capital C with cedilla */
NULL, /* 200 capital E with grave accent */
NULL, /* 201 capital E with acute accent */
NULL, /* 202 capital E with circumflex accent */
NULL, /* 203 capital E with diaeresis */
NULL, /* 204 capital I with grave accent */
NULL, /* 205 capital I with acute accent */
NULL, /* 206 capital I with circumflex accent */
NULL, /* 207 capital I with diaeresis */
NULL, /* 208 capital icelandic ETH */
NULL, /* 209 capital N with tilde */
NULL, /* 210 capital O with grave accent */
NULL, /* 211 capital O with acute accent */
NULL, /* 212 capital O with circumflex accent */
NULL, /* 213 capital O with tilde */
NULL, /* 214 capital O with diaeresis */
NULL, /* 215 multiplication sign */
NULL, /* 216 capital O with oblique stroke */
NULL, /* 217 capital U with grave accent */
NULL, /* 218 capital U with acute accent */
NULL, /* 219 capital U with circumflex accent */
NULL, /* 220 capital U with diaeresis */
NULL, /* 221 capital Y with acute accent */
NULL, /* 222 capital icelandic THORN */
NULL, /* 223 small german sharp s */
"!0", /* 224 small a with grave accent */
NULL, /* 225 small a with acute accent */
"!1", /* 226 small a with circumflex accent */
NULL, /* 227 small a with tilde */
NULL, /* 228 small a with diaeresis */
NULL, /* 229 small a with ring above */
"!;", /* 230 small diphthong a with e */
"!=", /* 231 small c with cedilla */
"!3", /* 232 small e with grave accent */
"!2", /* 233 small e with acute accent */
"!5", /* 234 small e with circumflex accent */
"!4", /* 235 small e with diaeresis */
NULL, /* 236 small i with grave accent */
NULL, /* 237 small i with acute accent */
"!7", /* 238 small i with circumflex accent */
"!6", /* 239 small i with diaeresis */
NULL, /* 240 small icelandic eth */
NULL, /* 241 small n with tilde */
NULL, /* 242 small o with grave accent */
NULL, /* 243 small o with acute accent */
"!8", /* 244 small o with circumflex accent */
NULL, /* 245 small o with tilde */
NULL, /* 246 small o with diaeresis */
"!<", /* 247 division sign (or French oe?) */
NULL, /* 248 small o with oblique stroke */
"!9", /* 249 small u with grave accent */
NULL, /* 250 small u with acute accent */
"!:", /* 251 small u with circumflex accent */
NULL, /* 252 small u with diaeresis */
NULL, /* 253 small y with acute accent */
NULL, /* 254 small icelandic thorn */
NULL, /* 255 small y with diaeresis */
};
static bool
init_latin1_bangbang (RECODE_STEP step,
RECODE_CONST_REQUEST request _GL_UNUSED,
RECODE_CONST_OPTION_LIST before_options,
RECODE_CONST_OPTION_LIST after_options)
{
if (before_options || after_options)
return false;
step->step_type = RECODE_BYTE_TO_STRING;
/* The cast is a way to silently discard the const. */
step->step_table = (void *) translation_table;
return true;
}
static bool
transform_bangbang_latin1 (RECODE_SUBTASK subtask)
{
int input_char; /* current character */
while (input_char = recode_get_byte (subtask), input_char != EOF)
{
if (input_char >= 'A' && input_char <= 'Z')
input_char += 'a' - 'A';
else if (input_char == '!')
{
input_char = recode_get_byte (subtask);
if (input_char >= 'a' && input_char <= 'z')
input_char += 'A' - 'a';
else if (input_char < 'A' || input_char > 'Z')
switch (input_char)
{
case '"': input_char = '!'; break;
case '0': input_char = 224; break; /* a` */
case '1': input_char = 226; break; /* a^ */
case '2': input_char = 233; break; /* e' */
case '3': input_char = 232; break; /* e` */
case '4': input_char = 235; break; /* e" */
case '5': input_char = 234; break; /* e^ */
case '6': input_char = 236; break; /* e" */
case '7': input_char = 238; break; /* i^ */
case '8': input_char = 244; break; /* o^ */
case '9': input_char = 249; break; /* u` */
case ':': input_char = 251; break; /* u^ */
case '=': input_char = 231; break; /* c, */
case '>': input_char = 171; break; /* `` */
case '?': input_char = 187; break; /* '' */
case ';': input_char = 230; break; /* ae */
case '<': input_char = 247; break; /* oe ??? */
case '@': input_char = '`'; break;
case '[': input_char = '{'; break;
case '\\': input_char = '|'; break;
case ']': input_char = '}'; break;
case '^': input_char = '~'; break;
case '_': input_char = 127; break; /* del */
case '!':
input_char = recode_get_byte (subtask);
if (input_char == 'J' || input_char == 'j')
RETURN_IF_NOGO (RECODE_NOT_CANONICAL, subtask);
/* FIXME: What is canonical? Upper case or lower case? */
if (input_char >= 'A' && input_char <= 'Z')
input_char += 1 - 'A';
else if (input_char >= 'a' && input_char <= 'z')
input_char += 1 - 'a';
else
switch (input_char)
{
case '@': input_char = 0; break;
case '[': input_char = 27; break;
case '\\': input_char = 28; break;
case ']': input_char = 29; break;
case '^': input_char = 30; break;
case '_': input_char = 31; break;
default:
RETURN_IF_NOGO (RECODE_INVALID_INPUT, subtask);
recode_put_byte ('!', subtask);
recode_put_byte ('!', subtask);
if (input_char == EOF)
SUBTASK_RETURN (subtask);
}
break;
default:
RETURN_IF_NOGO (RECODE_INVALID_INPUT, subtask);
recode_put_byte ('!', subtask);
if (input_char == EOF)
SUBTASK_RETURN (subtask);
}
}
recode_put_byte (input_char, subtask);
}
SUBTASK_RETURN (subtask);
}
bool
module_bangbang (RECODE_OUTER outer)
{
return
recode_declare_single (outer, "Latin-1", "Bang-Bang",
outer->quality_byte_to_variable,
init_latin1_bangbang, recode_transform_byte_to_variable)
&& recode_declare_single (outer, "Bang-Bang", "Latin-1",
outer->quality_variable_to_byte,
NULL, transform_bangbang_latin1);
}
void
delmodule_bangbang (_GL_UNUSED RECODE_OUTER outer)
{
}