ede/eiconman/Utf8.cpp

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#include "Utf8.h"
int utf16_to_utf8(unsigned int from, char* to) {
if(from < 0x000080) {
to[0] = from;
return 1;
} else if(from < 0x000800) {
to[0] = 0xC0 | (from >> 6);
to[1] = 0x80 | (from & 0x3F);
return 2;
} else if(from < 0x010000) {
to[0] = 0xE0 | (from >> 12);
to[1] = 0x80 | ((from >> 6) & 0x3F);
to[2] = 0x80 | (from & 0x3F);
return 3;
} else if(from < 0x00200000) {
to[0] = 0xF0 | (from >> 18);
to[1] = 0x80 | ((from >> 12) & 0x3F);
to[2] = 0x80 | ((from >> 6) & 0x3F);
to[3] = 0x80 | (from & 0x3F);
return 4;
} else if(from < 0x01000000) {
to[0] = 0xF8 | (from >> 24);
to[1] = 0x80 | ((from >> 18) & 0x3F);
to[2] = 0x80 | ((from >> 12) & 0x3F);
to[3] = 0x80 | ((from >> 6) & 0x3F);
to[4] = 0x80 | (from & 0x3F);
return 5;
}
to[0] = '?';
return -1;
}
int utf16_to_utf8_str(unsigned short* from, int len, char* to) {
int j = 0;
for(int i = 0; i < len; i++) {
int s = utf16_to_utf8((unsigned int)from[i], to + j);
if(s < 1)
j += 1;
else
j += s;
}
return j;
}
bool is_utf16(unsigned short* from, int len) {
return !(from[0] < 0x000080);
}