| 1 | #include "3ds/util/utf.h" |
| 2 | |
| 3 | ssize_t |
| 4 | decode_utf8(uint32_t *out, |
| 5 | const uint8_t *in) |
| 6 | { |
| 7 | uint8_t code1, code2, code3, code4; |
| 8 | |
| 9 | code1 = *in++; |
| 10 | if(code1 < 0x80) |
| 11 | { |
| 12 | /* 1-byte sequence */ |
| 13 | *out = code1; |
| 14 | return 1; |
| 15 | } |
| 16 | else if(code1 < 0xC2) |
| 17 | { |
| 18 | return -1; |
| 19 | } |
| 20 | else if(code1 < 0xE0) |
| 21 | { |
| 22 | /* 2-byte sequence */ |
| 23 | code2 = *in++; |
| 24 | if((code2 & 0xC0) != 0x80) |
| 25 | { |
| 26 | return -1; |
| 27 | } |
| 28 | |
| 29 | *out = (code1 << 6) + code2 - 0x3080; |
| 30 | return 2; |
| 31 | } |
| 32 | else if(code1 < 0xF0) |
| 33 | { |
| 34 | /* 3-byte sequence */ |
| 35 | code2 = *in++; |
| 36 | if((code2 & 0xC0) != 0x80) |
| 37 | { |
| 38 | return -1; |
| 39 | } |
| 40 | if(code1 == 0xE0 && code2 < 0xA0) |
| 41 | { |
| 42 | return -1; |
| 43 | } |
| 44 | |
| 45 | code3 = *in++; |
| 46 | if((code3 & 0xC0) != 0x80) |
| 47 | { |
| 48 | return -1; |
| 49 | } |
| 50 | |
| 51 | *out = (code1 << 12) + (code2 << 6) + code3 - 0xE2080; |
| 52 | return 3; |
| 53 | } |
| 54 | else if(code1 < 0xF5) |
| 55 | { |
| 56 | /* 4-byte sequence */ |
| 57 | code2 = *in++; |
| 58 | if((code2 & 0xC0) != 0x80) |
| 59 | { |
| 60 | return -1; |
no outgoing calls
no test coverage detected