Sha256: 73b226d488973c8e5beed98a88206ee3945c64c1bf4da866837d9caaf2cee1b0
Contents?: true
Size: 1.86 KB
Versions: 44
Compression:
Stored size: 1.86 KB
Contents
/* special.c
* Copyright (c) 2011, Peter Ohler
* All rights reserved.
*/
#include "special.h"
/*
u0000..u007F 00000000000000xxxxxxx 0xxxxxxx
u0080..u07FF 0000000000yyyyyxxxxxx 110yyyyy 10xxxxxx
u0800..uD7FF, uE000..uFFFF 00000zzzzyyyyyyxxxxxx 1110zzzz 10yyyyyy 10xxxxxx
u10000..u10FFFF uuuzzzzzzyyyyyyxxxxxx 11110uuu 10zzzzzz 10yyyyyy 10xxxxxx
*/
char*
ox_ucs_to_utf8_chars(char *text, uint64_t u) {
int reading = 0;
int i;
unsigned char c;
if (u <= 0x000000000000007FULL) {
/* 0xxxxxxx */
*text++ = (char)u;
} else if (u <= 0x00000000000007FFULL) {
/* 110yyyyy 10xxxxxx */
*text++ = (char)(0x00000000000000C0ULL | (0x000000000000001FULL & (u >> 6)));
*text++ = (char)(0x0000000000000080ULL | (0x000000000000003FULL & u));
} else if (u <= 0x000000000000D7FFULL || (0x000000000000E000ULL <= u && u <= 0x000000000000FFFFULL)) {
/* 1110zzzz 10yyyyyy 10xxxxxx */
*text++ = (char)(0x00000000000000E0ULL | (0x000000000000000FULL & (u >> 12)));
*text++ = (char)(0x0000000000000080ULL | (0x000000000000003FULL & (u >> 6)));
*text++ = (char)(0x0000000000000080ULL | (0x000000000000003FULL & u));
} else if (0x0000000000010000ULL <= u && u <= 0x000000000010FFFFULL) {
/* 11110uuu 10zzzzzz 10yyyyyy 10xxxxxx */
*text++ = (char)(0x00000000000000F0ULL | (0x0000000000000007ULL & (u >> 18)));
*text++ = (char)(0x0000000000000080ULL | (0x000000000000003FULL & (u >> 12)));
*text++ = (char)(0x0000000000000080ULL | (0x000000000000003FULL & (u >> 6)));
*text++ = (char)(0x0000000000000080ULL | (0x000000000000003FULL & u));
} else {
/* assume it is UTF-8 encoded directly and not UCS */
for (i = 56; 0 <= i; i -= 8) {
c = (unsigned char)((u >> i) & 0x00000000000000FFULL);
if (reading) {
*text++ = (char)c;
} else if ('\0' != c) {
*text++ = (char)c;
reading = 1;
}
}
}
return text;
}
Version data entries
44 entries across 44 versions & 2 rubygems