зеркало из https://github.com/github/ruby.git
175 строки
4.6 KiB
C
175 строки
4.6 KiB
C
/**********************************************************************
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sjis.c - Oniguruma (regular expression library)
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Copyright (C) 2003-2004 K.Kosako (kosako@sofnec.co.jp)
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**********************************************************************/
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#include "regenc.h"
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static const char SJIS_CAN_BE_TRAIL_TABLE[256] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0
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};
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#define SJIS_ISMB_FIRST(byte) (OnigEncodingSJIS.len_table[byte] > 1)
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#define SJIS_ISMB_TRAIL(byte) SJIS_CAN_BE_TRAIL_TABLE[(byte)]
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static OnigCodePoint
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sjis_mbc_to_code(UChar* p, UChar* end)
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{
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int c, i, len;
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OnigCodePoint n;
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c = *p++;
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len = enc_len(ONIG_ENCODING_SJIS, c);
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n = c;
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if (len == 1) return n;
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for (i = 1; i < len; i++) {
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if (p >= end) break;
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c = *p++;
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n <<= 8; n += c;
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}
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return n;
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}
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static int
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sjis_code_to_mbc(OnigCodePoint code, UChar *buf)
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{
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UChar *p = buf;
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if ((code & 0xff00) != 0) *p++ = (UChar )(((code >> 8) & 0xff));
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*p++ = (UChar )(code & 0xff);
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#if 0
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if (enc_len(ONIG_ENCODING_SJIS, buf[0]) != (p - buf))
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return REGERR_INVALID_WIDE_CHAR_VALUE;
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#endif
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return p - buf;
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}
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static int
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sjis_mbc_to_lower(UChar* p, UChar* lower)
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{
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int len;
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if (ONIGENC_IS_MBC_ASCII(p)) {
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*lower = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p);
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return 1;
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}
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else {
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len = enc_len(ONIG_ENCODING_SJIS, *p);
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if (lower != p) {
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/* memcpy(lower, p, len); */
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int i;
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for (i = 0; i < len; i++) {
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*lower++ = *p++;
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}
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}
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return len; /* return byte length of converted char to lower */
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}
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}
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static int
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sjis_code_is_ctype(OnigCodePoint code, unsigned int ctype)
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{
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if ((ctype & ONIGENC_CTYPE_WORD) != 0) {
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if (code < 128)
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return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
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else {
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int first = onigenc_mb2_code_to_mbc_first(code);
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return (enc_len(ONIG_ENCODING_SJIS, first) > 1 ? TRUE : FALSE);
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}
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ctype &= ~ONIGENC_CTYPE_WORD;
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if (ctype == 0) return FALSE;
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}
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if (code < 128)
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return ONIGENC_IS_ASCII_CODE_CTYPE(code, ctype);
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else
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return FALSE;
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}
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static UChar*
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sjis_left_adjust_char_head(UChar* start, UChar* s)
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{
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UChar *p;
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int len;
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if (s <= start) return s;
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p = s;
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if (SJIS_ISMB_TRAIL(*p)) {
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while (p > start) {
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if (! SJIS_ISMB_FIRST(*--p)) {
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p++;
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break;
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}
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}
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}
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len = enc_len(ONIG_ENCODING_SJIS, *p);
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if (p + len > s) return p;
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p += len;
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return p + ((s - p) & ~1);
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}
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static int
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sjis_is_allowed_reverse_match(UChar* s, UChar* end)
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{
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UChar c = *s;
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return (SJIS_ISMB_TRAIL(c) ? FALSE : TRUE);
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}
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OnigEncodingType OnigEncodingSJIS = {
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{
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
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2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1
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},
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"Shift_JIS", /* name */
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2, /* max byte length */
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FALSE, /* is_fold_match */
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ONIGENC_CTYPE_SUPPORT_LEVEL_SB, /* ctype_support_level */
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FALSE, /* is continuous sb mb codepoint */
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sjis_mbc_to_code,
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onigenc_mb2_code_to_mbclen,
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sjis_code_to_mbc,
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sjis_mbc_to_lower,
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onigenc_mbn_mbc_is_case_ambig,
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sjis_code_is_ctype,
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onigenc_nothing_get_ctype_code_range,
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sjis_left_adjust_char_head,
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sjis_is_allowed_reverse_match,
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onigenc_nothing_get_all_fold_match_code,
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onigenc_nothing_get_fold_match_info
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};
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