| |
| /* |
| * BIG-5 |
| */ |
| |
| static int |
| ces_big5_mbtowc (conv_t conv, wchar_t *pwc, const unsigned char *s, int n) |
| { |
| unsigned char c = *s; |
| /* Code set 0 (ASCII) */ |
| if (c < 0x80) |
| return ascii_mbtowc(conv,pwc,s,n); |
| /* Code set 1 (BIG5) */ |
| if (c >= 0xa1 && c < 0xff) { |
| if (n < 2) |
| return RET_TOOFEW(0); |
| { |
| unsigned char c2 = s[1]; |
| if ((c2 >= 0x40 && c2 < 0x7f) || (c2 >= 0xa1 && c2 < 0xff)) |
| return big5_mbtowc(conv,pwc,s,2); |
| else |
| return RET_ILSEQ; |
| } |
| } |
| return RET_ILSEQ; |
| } |
| |
| static int |
| ces_big5_wctomb (conv_t conv, unsigned char *r, wchar_t wc, int n) |
| { |
| unsigned char buf[2]; |
| int ret; |
| |
| /* Code set 0 (ASCII) */ |
| ret = ascii_wctomb(conv,r,wc,n); |
| if (ret != RET_ILSEQ) |
| return ret; |
| |
| /* Code set 1 (BIG5) */ |
| ret = big5_wctomb(conv,buf,wc,2); |
| if (ret != RET_ILSEQ) { |
| if (ret != 2) abort(); |
| if (n < 2) |
| return RET_TOOSMALL; |
| r[0] = buf[0]; |
| r[1] = buf[1]; |
| return 2; |
| } |
| |
| return RET_ILSEQ; |
| } |