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euc_tw.h
Package: libiconv-1.1.tar.gz [view]
Upload User: yingmei828
Upload Date: 2007-01-01
Package Size: 1646k
Code Size: 2k
Category:
SourceCode/Document
Development Platform:
Unix_Linux
- /*
- * EUC-TW
- */
- static int
- euc_tw_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 (CNS 11643-1992 Plane 1) */
- if (c >= 0xa1 && c < 0xff) {
- if (n < 2)
- return RET_TOOFEW(0);
- {
- unsigned char c2 = s[1];
- if (c2 >= 0xa1 && c2 < 0xff) {
- unsigned char buf[2];
- buf[0] = c-0x80; buf[1] = c2-0x80;
- return cns11643_1_mbtowc(conv,pwc,buf,2);
- } else
- return RET_ILSEQ;
- }
- }
- /* Code set 2 (CNS 11643-1992 Planes 1-16) */
- if (c == 0x8e) {
- if (n < 4)
- return RET_TOOFEW(0);
- {
- unsigned char c2 = s[1];
- if (c2 >= 0xa1 && c2 <= 0xb0) {
- unsigned char c3 = s[2];
- unsigned char c4 = s[3];
- if (c3 >= 0xa1 && c3 < 0xff && c4 >= 0xa1 && c4 < 0xff) {
- unsigned char buf[2];
- int ret;
- buf[0] = c3-0x80; buf[1] = c4-0x80;
- switch (c2-0xa0) {
- case 1: ret = cns11643_1_mbtowc(conv,pwc,buf,2); break;
- case 2: ret = cns11643_2_mbtowc(conv,pwc,buf,2); break;
- case 3: ret = cns11643_3_mbtowc(conv,pwc,buf,2); break;
- default: return RET_ILSEQ;
- }
- if (ret == RET_ILSEQ)
- return RET_ILSEQ;
- if (ret != 2) abort();
- return 4;
- }
- }
- }
- }
- return RET_ILSEQ;
- }
- static int
- euc_tw_wctomb (conv_t conv, unsigned char *r, wchar_t wc, int n)
- {
- unsigned char buf[3];
- int ret;
- /* Code set 0 (ASCII) */
- ret = ascii_wctomb(conv,r,wc,n);
- if (ret != RET_ILSEQ)
- return ret;
- ret = cns11643_wctomb(conv,buf,wc,3);
- if (ret != RET_ILSEQ) {
- if (ret != 3) abort();
- /* Code set 1 (CNS 11643-1992 Plane 1) */
- if (buf[0] == 0) {
- if (n < 2)
- return RET_TOOSMALL;
- r[0] = buf[1]+0x80;
- r[1] = buf[2]+0x80;
- return 2;
- }
- /* Code set 2 (CNS 11643-1992 Planes 1-16) */
- if (n < 4)
- return RET_TOOSMALL;
- r[0] = 0x8e;
- r[1] = buf[0]+0xa1;
- r[2] = buf[1]+0x80;
- r[3] = buf[2]+0x80;
- return 4;
- }
- return RET_ILSEQ;
- }