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koi8r.c
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koi8r.c
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#include "koi8r.h"
// koi8-r -> utf-8
static unsigned char utf8[128][3] = {
{226, 148, 128},
{226, 148, 130},
{226, 148, 140},
{226, 148, 144},
{226, 148, 148},
{226, 148, 152},
{226, 148, 156},
{226, 148, 164},
{226, 148, 172},
{226, 148, 180},
{226, 148, 188},
{226, 150, 128},
{226, 150, 132},
{226, 150, 136},
{226, 150, 140},
{226, 150, 144},
{226, 150, 145},
{226, 150, 146},
{226, 150, 147},
{226, 140, 160},
{226, 150, 160},
{226, 136, 153},
{226, 136, 154},
{226, 137, 136},
{226, 137, 164},
{226, 137, 165},
{194, 160, 0},
{226, 140, 161},
{194, 176, 0},
{194, 178, 0},
{194, 183, 0},
{195, 183, 0},
{226, 149, 144},
{226, 149, 145},
{226, 149, 146},
{209, 145, 0},
{226, 149, 147},
{226, 149, 148},
{226, 149, 149},
{226, 149, 150},
{226, 149, 151},
{226, 149, 152},
{226, 149, 153},
{226, 149, 154},
{226, 149, 155},
{226, 149, 156},
{226, 149, 157},
{226, 149, 158},
{226, 149, 159},
{226, 149, 160},
{226, 149, 161},
{208, 129, 0},
{226, 149, 162},
{226, 149, 163},
{226, 149, 164},
{226, 149, 165},
{226, 149, 166},
{226, 149, 167},
{226, 149, 168},
{226, 149, 169},
{226, 149, 170},
{226, 149, 171},
{226, 149, 172},
{194, 169, 0},
{209, 142, 0},
{208, 176, 0},
{208, 177, 0},
{209, 134, 0},
{208, 180, 0},
{208, 181, 0},
{209, 132, 0},
{208, 179, 0},
{209, 133, 0},
{208, 184, 0},
{208, 185, 0},
{208, 186, 0},
{208, 187, 0},
{208, 188, 0},
{208, 189, 0},
{208, 190, 0},
{208, 191, 0},
{209, 143, 0},
{209, 128, 0},
{209, 129, 0},
{209, 130, 0},
{209, 131, 0},
{208, 182, 0},
{208, 178, 0},
{209, 140, 0},
{209, 139, 0},
{208, 183, 0},
{209, 136, 0},
{209, 141, 0},
{209, 137, 0},
{209, 135, 0},
{209, 138, 0},
{208, 174, 0},
{208, 144, 0},
{208, 145, 0},
{208, 166, 0},
{208, 148, 0},
{208, 149, 0},
{208, 164, 0},
{208, 147, 0},
{208, 165, 0},
{208, 152, 0},
{208, 153, 0},
{208, 154, 0},
{208, 155, 0},
{208, 156, 0},
{208, 157, 0},
{208, 158, 0},
{208, 159, 0},
{208, 175, 0},
{208, 160, 0},
{208, 161, 0},
{208, 162, 0},
{208, 163, 0},
{208, 150, 0},
{208, 146, 0},
{208, 172, 0},
{208, 171, 0},
{208, 151, 0},
{208, 168, 0},
{208, 173, 0},
{208, 169, 0},
{208, 167, 0},
{208, 170, 0}
};
// koi8-r -> cp866
static unsigned char cp866[128] = {
196, 179, 218, 191, 192, 217, 195, 180,
194, 193, 197, 223, 220, 219, 221, 222,
176, 177, 178, 244, 254, 249, 251, 247,
243, 242, 255, 245, 248, 253, 250, 246,
205, 186, 213, 241, 214, 201, 184, 183,
187, 212, 211, 200, 190, 189, 188, 198,
199, 204, 181, 240, 182, 185, 209, 210,
203, 207, 208, 202, 216, 215, 206, 252,
238, 160, 161, 230, 164, 165, 228, 163,
229, 168, 169, 170, 171, 172, 173, 174,
175, 239, 224, 225, 226, 227, 166, 162,
236, 235, 167, 232, 237, 233, 231, 234,
158, 128, 129, 150, 132, 133, 148, 131,
149, 136, 137, 138, 139, 140, 141, 142,
143, 159, 144, 145, 146, 147, 134, 130,
156, 155, 135, 152, 157, 153, 151, 154
};
// koi8-r -> win1251
static unsigned char win1251[128] = {
128, 129, 130, 131, 132, 133, 134, 135,
136, 137, 138, 139, 140, 141, 142, 143,
144, 145, 146, 147, 148, 149, 150, 151,
152, 153, 218, 155, 176, 157, 183, 159,
160, 161, 162, 184, 186, 165, 166, 191,
168, 169, 170, 171, 172, 173, 174, 175,
156, 177, 178, 168, 170, 181, 182, 175,
184, 185, 186, 187, 188, 189, 190, 185,
254, 224, 225, 246, 228, 229, 244, 227,
245, 232, 233, 234, 235, 236, 237, 238,
239, 255, 240, 241, 242, 243, 230, 226,
252, 251, 231, 248, 253, 249, 247, 250,
222, 192, 193, 214, 196, 197, 212, 195,
213, 200, 201, 202, 203, 204, 205, 206,
207, 223, 208, 209, 210, 211, 198, 194,
220, 219, 199, 216, 221, 217, 215, 218
};
/* Translate koi8-r string to utf-8 string.
* String can be truncated if there is not enough buffer size.
*
* In:
* str - source string in koi8-r encoding
* buf - ptr to receiving buffer
* size - buffer size
* Return:
* number of bytes written to buffer
*/
size_t koi8r_to_utf8(const char *str, char *buf, size_t size) {
const unsigned char *s = (const unsigned char*)str;
unsigned char *d = (unsigned char*)buf;
size_t dlen = 0;
size--;
for (; *s; s++) {
unsigned char c = *s;
if (c < 0x80) {
if (dlen >= size) break;
d[dlen++] = c;
} else {
unsigned char *u = utf8[c-0x80];
if (u[0] < 0xE0) {
if (dlen + 2 >= size) break;
d[dlen++] = u[0];
d[dlen++] = u[1];
} else {
if (dlen + 3 >= size) break;
d[dlen++] = u[0];
d[dlen++] = u[1];
d[dlen++] = u[2];
}
}
}
d[dlen] = 0;
return dlen;
}
/* Translate koi8-r string to cp866 string.
* String can be truncated if there is not enough buffer size.
*
* In:
* str - source string in koi8-r encoding
* buf - ptr to receiving buffer
* size - buffer size
* Return:
* number of bytes written to buffer
*/
size_t koi8r_to_866(const char *str, char *buf, size_t size) {
const unsigned char *s = (const unsigned char*)str;
unsigned char *d = (unsigned char*)buf;
size_t dlen = 0;
size--;
for (; *s && dlen < size; s++) {
unsigned char c = *s;
if (c < 0x80) {
d[dlen++] = c;
} else {
d[dlen++] = cp866[c-0x80];
}
}
d[dlen] = 0;
return dlen;
}
/* Translate koi8-r string to win1251 string.
* String can be truncated if there is not enough buffer size.
*
* In:
* str - source string in koi8-r encoding
* buf - ptr to receiving buffer
* size - buffer size
* Return:
* number of bytes written to buffer
*/
size_t koi8r_to_1251(const char *str, char *buf, size_t size) {
const unsigned char *s = (const unsigned char*)str;
unsigned char *d = (unsigned char*)buf;
size_t dlen = 0;
size--;
for (; *s && dlen < size; s++) {
unsigned char c = *s;
if (c < 0x80) {
d[dlen++] = c;
} else {
d[dlen++] = win1251[c-0x80];
}
}
d[dlen] = 0;
return dlen;
}