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oniguruma
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utf16_le.c
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/********************************************************************** utf16_le.c - Oniguruma (regular expression library) **********************************************************************/ /*- * Copyright (c) 2002-2008 K.Kosako <sndgk393 AT ybb DOT ne DOT jp> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include "regenc.h" static const int EncLen_UTF16[] = { 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 }; static int utf16le_code_to_mbclen(OnigCodePoint code) { return (code > 0xffff ? 4 : 2); } static int utf16le_mbc_enc_len(const UChar* p) { return EncLen_UTF16[*(p+1)]; } static int utf16le_is_mbc_newline(const UChar* p, const UChar* end) { if (p + 1 < end) { if (*p == 0x0a && *(p+1) == 0x00) return 1; #ifdef USE_UNICODE_ALL_LINE_TERMINATORS if (( #ifndef USE_CRNL_AS_LINE_TERMINATOR *p == 0x0d || #endif *p == 0x85) && *(p+1) == 0x00) return 1; if (*(p+1) == 0x20 && (*p == 0x29 || *p == 0x28)) return 1; #endif } return 0; } static OnigCodePoint utf16le_mbc_to_code(const UChar* p, const UChar* end) { OnigCodePoint code; UChar c0 = *p; UChar c1 = *(p+1); if (UTF16_IS_SURROGATE_FIRST(c1)) { if (end - p < 4) return 0; code = ((((c1 - 0xd8) << 2) + ((c0 & 0xc0) >> 6) + 1) << 16) + ((((c0 & 0x3f) << 2) + (p[3] - 0xdc)) << 8) + p[2]; } else { code = c1 * 256 + p[0]; } return code; } static int utf16le_code_to_mbc(OnigCodePoint code, UChar *buf) { UChar* p = buf; if (code > 0xffff) { unsigned int plane, high; plane = (code >> 16) - 1; high = (code & 0xff00) >> 8; *p++ = ((plane & 0x03) << 6) + (high >> 2); *p++ = (plane >> 2) + 0xd8; *p++ = (UChar )(code & 0xff); *p = (high & 0x03) + 0xdc; return 4; } else { *p++ = (UChar )(code & 0xff); *p++ = (UChar )((code & 0xff00) >> 8); return 2; } } static int utf16le_mbc_case_fold(OnigCaseFoldType flag, const UChar** pp, const UChar* end, UChar* fold) { const UChar* p = *pp; if (ONIGENC_IS_ASCII_CODE(*p) && *(p+1) == 0) { #ifdef USE_UNICODE_CASE_FOLD_TURKISH_AZERI if ((flag & ONIGENC_CASE_FOLD_TURKISH_AZERI) != 0) { if (*p == 0x49) { *fold++ = 0x31; *fold = 0x01; (*pp) += 2; return 2; } } #endif *fold++ = ONIGENC_ASCII_CODE_TO_LOWER_CASE(*p); *fold = 0; *pp += 2; return 2; } else return onigenc_unicode_mbc_case_fold(ONIG_ENCODING_UTF16_LE, flag, pp, end, fold); } #if 0 static int utf16le_is_mbc_ambiguous(OnigCaseFoldType flag, const UChar** pp, const UChar* end) { const UChar* p = *pp; (*pp) += EncLen_UTF16[*(p+1)]; if (*(p+1) == 0) { int c, v; if (*p == 0xdf && (flag & INTERNAL_ONIGENC_CASE_FOLD_MULTI_CHAR) != 0) { return TRUE; } c = *p; v = ONIGENC_IS_UNICODE_ISO_8859_1_BIT_CTYPE(c, (BIT_CTYPE_UPPER | BIT_CTYPE_LOWER)); if ((v | BIT_CTYPE_LOWER) != 0) { /* 0xaa, 0xb5, 0xba are lower case letter, but can't convert. */ if (c >= 0xaa && c <= 0xba) return FALSE; else return TRUE; } return (v != 0 ? TRUE : FALSE); } return FALSE; } #endif static UChar* utf16le_left_adjust_char_head(const UChar* start, const UChar* s) { if (s <= start) return (UChar* )s; if ((s - start) % 2 == 1) { s--; } if (UTF16_IS_SURROGATE_SECOND(*(s+1)) && s > start + 1) s -= 2; return (UChar* )s; } static int utf16le_get_case_fold_codes_by_str(OnigCaseFoldType flag, const OnigUChar* p, const OnigUChar* end, OnigCaseFoldCodeItem items[]) { return onigenc_unicode_get_case_fold_codes_by_str(ONIG_ENCODING_UTF16_LE, flag, p, end, items); } OnigEncodingType OnigEncodingUTF16_LE = { utf16le_mbc_enc_len, "UTF-16LE", /* name */ 4, /* max byte length */ 2, /* min byte length */ utf16le_is_mbc_newline, utf16le_mbc_to_code, utf16le_code_to_mbclen, utf16le_code_to_mbc, utf16le_mbc_case_fold, onigenc_unicode_apply_all_case_fold, utf16le_get_case_fold_codes_by_str, onigenc_unicode_property_name_to_ctype, onigenc_unicode_is_code_ctype, onigenc_utf16_32_get_ctype_code_range, utf16le_left_adjust_char_head, onigenc_always_false_is_allowed_reverse_match };