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/*
* charset.c
*
* Conversion tables and routines to support different character sets.
* The PGP internal format is latin-1.
*
* (c) Copyright 1990-1994 by Philip Zimmermann. All rights reserved.
* The author assumes no liability for damages resulting from the use
* of this software, even if the damage results from defects in this
* software. No warranty is expressed or implied.
*
* Code that has been incorporated into PGP from other sources was
* either originally published in the public domain or is used with
* permission from the various authors.
*
* PGP is available for free to the public under certain restrictions.
* See the PGP User's Guide (included in the release package) for
* important information about licensing, patent restrictions on
* certain algorithms, trademarks, copyrights, and export controls.
*/
#include <stdio.h>
#include <string.h>
#include "usuals.h"
#include "language.h"
#include "charset.h"
#include "system.h"
#ifndef NULL
#define NULL 0
#endif
#define UNK '?'
static unsigned char
intern2ascii[] = { /* ISO 8859-1 Latin Alphabet 1 to US ASCII */
UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
32, 33, 99, 35, 36, 89, 124, 80, 34, 67, 97, 34, 126, 45, 82, 95,
111, UNK, 50, 51, 39, 117, 45, 45, 44, 49, 111, 34, UNK, UNK, UNK, 63,
65, 65, 65, 65, 65, 65, 65, 67, 69, 69, 69, 69, 73, 73, 73, 73,
68, 78, 79, 79, 79, 79, 79, 120, 79, 85, 85, 85, 85, 89, 84, 115,
97, 97, 97, 97, 97, 97, 97, 99, 101, 101, 101, 101, 105, 105, 105, 105,
100, 110, 111, 111, 111, 111, 111, 47, 111, 117, 117, 117, 117, 121, 116, 121
};
static unsigned char
intern2cp850[] = { /* ISO 8859-1 Latin Alphabet 1
(Latin-1) to IBM Code Page 850 */
186, 205, 201, 187, 200, 188, 204, 185, 203, 202, 206, 223, 220, 219, 254, 242,
179, 196, 218, 191, 192, 217, 195, 180, 194, 193, 197, 176, 177, 178, 213, 159,
255, 173, 189, 156, 207, 190, 221, 245, 249, 184, 166, 174, 170, 240, 169, 238,
248, 241, 253, 252, 239, 230, 244, 250, 247, 251, 167, 175, 172, 171, 243, 168,
183, 181, 182, 199, 142, 143, 146, 128, 212, 144, 210, 211, 222, 214, 215, 216,
209, 165, 227, 224, 226, 229, 153, 158, 157, 235, 233, 234, 154, 237, 232, 225,
133, 160, 131, 198, 132, 134, 145, 135, 138, 130, 136, 137, 141, 161, 140, 139,
208, 164, 149, 162, 147, 228, 148, 246, 155, 151, 163, 150, 129, 236, 231, 152
};
static unsigned char
cp8502intern[] = { /* IBM Code Page 850 to Latin-1 */
199, 252, 233, 226, 228, 224, 229, 231, 234, 235, 232, 239, 238, 236, 196, 197,
201, 230, 198, 244, 246, 242, 251, 249, 255, 214, 220, 248, 163, 216, 215, 159,
225, 237, 243, 250, 241, 209, 170, 186, 191, 174, 172, 189, 188, 161, 171, 187,
155, 156, 157, 144, 151, 193, 194, 192, 169, 135, 128, 131, 133, 162, 165, 147,
148, 153, 152, 150, 145, 154, 227, 195, 132, 130, 137, 136, 134, 129, 138, 164,
240, 208, 202, 203, 200, 158, 205, 206, 207, 149, 146, 141, 140, 166, 204, 139,
211, 223, 212, 210, 245, 213, 181, 254, 222, 218, 219, 217, 253, 221, 175, 180,
173, 177, 143, 190, 182, 167, 247, 184, 176, 168, 183, 185, 179, 178, 142, 160
};
#ifndef MIT
static unsigned char
next2intern[] = { /* Nextstep char set to ISO 8859-1 Latin Alphabet 1 */
UNK, 0300, 0301, 0302, 0303, 0304, 0305, 0307, 0310, 0311, 0312, 0313, 0314, 0315, 0316, 0317,
0320, 0321, 0322, 0323, 0324, 0325, 0326, 0331, 0332, 0333, 0334, 0335, 0336, 0265, 0337, 0267,
0251, 0241, 0242, 0243, 0057, 0245, 0146, 0247, 0244, 0140, 0042, 0253, 0074, 0076, UNK, UNK,
0256, 0255, UNK, UNK, 0056, 0246, 0266, 0267, 0054, 0042, 0235, 0273, UNK, UNK, 0254, 0277,
0220, 0221, 0222, 0223, 0224, 0225, 0226, 0232, 0230, 0262, 0227, 0270, 0263, 0042, 0236, 0226,
0257, 0261, 0274, 0275, 0276, 0340, 0341, 0342, 0343, 0344, 0345, 0347, 0350, 0351, 0352, 0353,
0354, 0306, 0355, 0252, 0356, 0357, 0365, 0361, 0243, 0330, UNK, 0272, 0362, 0363, 0364, 0365,
0366, 0346, 0371, 0372, 0373, 0151, 0374, 0375, 0154, 0370, UNK, 0337, 0376, 0377, UNK, UNK
};
static unsigned char
intern2next[] = { /* ISO 8859-1 Latin Apphabet 1 (Latin-1) to NeXTSTEP Char set */
UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK, UNK,
0300, 0301, 0302, 0303, 0304, 0305, 0306, 0307, 0310, UNK, 0312, 0313, UNK, 0272, 0316, 0247,
UNK, 0241, 0242, 0243, 0250, 0245, 0265, UNK, 0310, 0240, 0343, 0253, 0276, 0261, 0260, 0320,
0312, 0321, 0311, 0314, 0270, 0235, 0266, 0267, 0313, 0300, UNK, 0273, 0322, 0323, 0324, 0277,
0201, 0202, 0203, 0204, 0205, 0206, 0341, 0207, 0210, 0211, 0212, 0213, 0214, 0215, 0216, 0217,
0220, 0221, 0222, 0223, 0224, 0225, 0226, 0236, 0351, 0227, 0230, 0231, 0232, 0233, 0234, 0373,
0325, 0326, 0327, 0330, 0331, 0332, 0361, 0333, 0334, 0335, 0336, 0337, 0340, 0342, 0344, 0345,
0346, 0347, 0354, 0355, 0356, 0357, 0360, 0237, 0371, 0362, 0363, 0364, 0366, 0367, 0374, 0375
};
#endif
/* Russian language specific conversation section */
/* Two point-to-point charset decode tables */
/* produced by Andrew A. Chernov */
/* Decode single char from KOI8-R to ALT-CODES, if present */
static unsigned char intern2alt[] = {
0xc4, 0xb3, 0xda, 0xbf, 0xc0, 0xd9, 0xc3, 0xb4,
0xc2, 0xc1, 0xc5, 0xdf, 0xdc, 0xdb, 0xdd, 0xde,
0xb0, 0xb1, 0xb2, 0xf4, 0xfe, 0xf9, 0xfb, 0xf7,
0xf3, 0xf2, 0xff, 0xf5, 0xf8, 0xfd, 0xfa, 0xf6,
0xcd, 0xba, 0xd5, 0xf1, 0xd6, 0xc9, 0xb8, 0xb7,
0xbb, 0xd4, 0xd3, 0xc8, 0xbe, 0xbd, 0xbc, 0xc6,
0xc7, 0xcc, 0xb5, 0xf0, 0xb6, 0xb9, 0xd1, 0xd2,
0xcb, 0xcf, 0xd0, 0xca, 0xd8, 0xd7, 0xce, 0xfc,
0xee, 0xa0, 0xa1, 0xe6, 0xa4, 0xa5, 0xe4, 0xa3,
0xe5, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae,
0xaf, 0xef, 0xe0, 0xe1, 0xe2, 0xe3, 0xa6, 0xa2,
0xec, 0xeb, 0xa7, 0xe8, 0xed, 0xe9, 0xe7, 0xea,
0x9e, 0x80, 0x81, 0x96, 0x84, 0x85, 0x94, 0x83,
0x95, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e,
0x8f, 0x9f, 0x90, 0x91, 0x92, 0x93, 0x86, 0x82,
0x9c, 0x9b, 0x87, 0x98, 0x9d, 0x99, 0x97, 0x9a
};
/* Decode single char from ALT-CODES, if present, to KOI8-R */
static unsigned char alt2intern[] = {
0xe1, 0xe2, 0xf7, 0xe7, 0xe4, 0xe5, 0xf6, 0xfa,
0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0,
0xf2, 0xf3, 0xf4, 0xf5, 0xe6, 0xe8, 0xe3, 0xfe,
0xfb, 0xfd, 0xff, 0xf9, 0xf8, 0xfc, 0xe0, 0xf1,
0xc1, 0xc2, 0xd7, 0xc7, 0xc4, 0xc5, 0xd6, 0xda,
0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0,
0x90, 0x91, 0x92, 0x81, 0x87, 0xb2, 0xb4, 0xa7,
0xa6, 0xb5, 0xa1, 0xa8, 0xae, 0xad, 0xac, 0x83,
0x84, 0x89, 0x88, 0x86, 0x80, 0x8a, 0xaf, 0xb0,
0xab, 0xa5, 0xbb, 0xb8, 0xb1, 0xa0, 0xbe, 0xb9,
0xba, 0xb6, 0xb7, 0xaa, 0xa9, 0xa2, 0xa4, 0xbd,
0xbc, 0x85, 0x82, 0x8d, 0x8c, 0x8e, 0x8f, 0x8b,
0xd2, 0xd3, 0xd4, 0xd5, 0xc6, 0xc8, 0xc3, 0xde,
0xdb, 0xdd, 0xdf, 0xd9, 0xd8, 0xdc, 0xc0, 0xd1,
0xb3, 0xa3, 0x99, 0x98, 0x93, 0x9b, 0x9f, 0x97,
0x9c, 0x95, 0x9e, 0x96, 0xbf, 0x9d, 0x94, 0x9a
};
/*
* Most Unixes has KOI8, and DOS has ALT_CODE
* If your Unix is non-standard, set CHARSET to "alt_codes"
* in config.txt
*/
#ifndef DEFAULT_CSET
#define DEFAULT_CSET "noconv"
#endif
#ifndef DEFAULT_RU_CSET
#define DEFAULT_RU_CSET "noconv"
#endif
/* End of Russian section */
int CONVERSION = NO_CONV; /* None text file conversion at start time */
unsigned char *ext_c_ptr;
static unsigned char *int_c_ptr;
#ifdef MSDOS
char charset[64] = "cp850";
#else
char charset[64] = "";
#endif
void
init_charset(void)
{
ext_c_ptr = NULL; /* NULL means latin1 or KOI8
(internal format) */
int_c_ptr = NULL;
if (charset[0] == '\0') {
/* use default character set for this system */
if (strcmp(language, "ru") == 0)
strcpy(charset, DEFAULT_RU_CSET);
else
strcpy(charset, DEFAULT_CSET);
} else {
strlwr(charset);
}
/* latin-1 and KOI8 are in internal format: no conversion needed */
if (!strcmp(charset, "latin1") || !strcmp(charset, "koi8") ||
!strcmp(charset, "noconv"))
return;
if (!strcmp(charset, "alt_codes")) {
ext_c_ptr = intern2alt;
int_c_ptr = alt2intern;
} else if (!strcmp(charset, "cp850")) {
ext_c_ptr = intern2cp850;
int_c_ptr = cp8502intern;
} else if (!strcmp(charset, "ascii")) {
ext_c_ptr = intern2ascii;
#ifndef MIT
} else if (!strcmp(charset, "next")) {
ext_c_ptr = intern2next;
int_c_ptr = next2intern;
#endif
} else {
fprintf(stderr, LANG("Unsupported character set: '%s'\n"),
charset);
}
}
char
EXT_C(char c)
{
if (c > '\0' || !ext_c_ptr)
return c;
return ext_c_ptr[c & 0x7f];
}
char
INT_C(char c)
{
if (c > '\0' || !int_c_ptr)
return c;
return int_c_ptr[c & 0x7f];
}
/*
* to_upper() and to_lower(), replacement for toupper() and tolower(),
* calling to_upper() on uppercase or to_lower on lowercase characters
* is handled correctly.
*
* XXX: should handle local characterset when 8-bit userID's are allowed
*/
int
to_upper(int c)
{
return (c >= 'a' && c <= 'z' ? c - ('a' - 'A') : c);
}
int
to_lower(int c)
{
return (c >= 'A' && c <= 'Z' ? c + ('a' - 'A') : c);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.