зеркало из https://github.com/mozilla/pjs.git
1518 строки
36 KiB
C
1518 строки
36 KiB
C
/*
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The contents of this file are subject to the Mozilla Public License
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Version 1.0 (the "License"); you may not use this file except in
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compliance with the License. You may obtain a copy of the License at
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http://www.mozilla.org/MPL/
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Software distributed under the License is distributed on an "AS IS"
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basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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License for the specific language governing rights and limitations
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under the License.
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The Original Code is expat.
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The Initial Developer of the Original Code is James Clark.
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Portions created by James Clark are Copyright (C) 1998
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James Clark. All Rights Reserved.
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Contributor(s):
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*/
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#include "xmldef.h"
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#include "xmltok.h"
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#include "nametab.h"
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#define VTABLE1 \
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{ PREFIX(prologTok), PREFIX(contentTok), PREFIX(cdataSectionTok) }, \
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{ PREFIX(attributeValueTok), PREFIX(entityValueTok) }, \
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PREFIX(sameName), \
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PREFIX(nameMatchesAscii), \
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PREFIX(nameLength), \
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PREFIX(skipS), \
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PREFIX(getAtts), \
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PREFIX(charRefNumber), \
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PREFIX(predefinedEntityName), \
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PREFIX(updatePosition), \
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PREFIX(isPublicId)
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#define VTABLE VTABLE1, PREFIX(toUtf8), PREFIX(toUtf16)
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#define UCS2_GET_NAMING(pages, hi, lo) \
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(namingBitmap[(pages[hi] << 3) + ((lo) >> 5)] & (1 << ((lo) & 0x1F)))
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/* A 2 byte UTF-8 representation splits the characters 11 bits
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between the bottom 5 and 6 bits of the bytes.
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We need 8 bits to index into pages, 3 bits to add to that index and
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5 bits to generate the mask. */
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#define UTF8_GET_NAMING2(pages, byte) \
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(namingBitmap[((pages)[(((byte)[0]) >> 2) & 7] << 3) \
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+ ((((byte)[0]) & 3) << 1) \
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+ ((((byte)[1]) >> 5) & 1)] \
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& (1 << (((byte)[1]) & 0x1F)))
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/* A 3 byte UTF-8 representation splits the characters 16 bits
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between the bottom 4, 6 and 6 bits of the bytes.
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We need 8 bits to index into pages, 3 bits to add to that index and
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5 bits to generate the mask. */
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#define UTF8_GET_NAMING3(pages, byte) \
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(namingBitmap[((pages)[((((byte)[0]) & 0xF) << 4) \
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+ ((((byte)[1]) >> 2) & 0xF)] \
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<< 3) \
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+ ((((byte)[1]) & 3) << 1) \
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+ ((((byte)[2]) >> 5) & 1)] \
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& (1 << (((byte)[2]) & 0x1F)))
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#define UTF8_GET_NAMING(pages, p, n) \
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((n) == 2 \
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? UTF8_GET_NAMING2(pages, (const unsigned char *)(p)) \
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: ((n) == 3 \
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? UTF8_GET_NAMING3(pages, (const unsigned char *)(p)) \
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: 0))
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#define UTF8_INVALID3(p) \
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((*p) == 0xED \
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? (((p)[1] & 0x20) != 0) \
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: ((*p) == 0xEF \
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? ((p)[1] == 0xBF && ((p)[2] == 0xBF || (p)[2] == 0xBE)) \
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: 0))
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#define UTF8_INVALID4(p) ((*p) == 0xF4 && ((p)[1] & 0x30) != 0)
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static
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int isNever(const ENCODING *enc, const char *p)
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{
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return 0;
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}
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static
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int utf8_isName2(const ENCODING *enc, const char *p)
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{
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return UTF8_GET_NAMING2(namePages, (const unsigned char *)p);
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}
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static
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int utf8_isName3(const ENCODING *enc, const char *p)
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{
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return UTF8_GET_NAMING3(namePages, (const unsigned char *)p);
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}
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#define utf8_isName4 isNever
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static
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int utf8_isNmstrt2(const ENCODING *enc, const char *p)
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{
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return UTF8_GET_NAMING2(nmstrtPages, (const unsigned char *)p);
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}
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static
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int utf8_isNmstrt3(const ENCODING *enc, const char *p)
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{
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return UTF8_GET_NAMING3(nmstrtPages, (const unsigned char *)p);
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}
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#define utf8_isNmstrt4 isNever
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#define utf8_isInvalid2 isNever
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static
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int utf8_isInvalid3(const ENCODING *enc, const char *p)
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{
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return UTF8_INVALID3((const unsigned char *)p);
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}
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static
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int utf8_isInvalid4(const ENCODING *enc, const char *p)
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{
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return UTF8_INVALID4((const unsigned char *)p);
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}
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struct normal_encoding {
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ENCODING enc;
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unsigned char type[256];
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#ifdef XML_MIN_SIZE
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int (*byteType)(const ENCODING *, const char *);
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int (*isNameMin)(const ENCODING *, const char *);
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int (*isNmstrtMin)(const ENCODING *, const char *);
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int (*byteToAscii)(const ENCODING *, const char *);
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int (*charMatches)(const ENCODING *, const char *, int);
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#endif /* XML_MIN_SIZE */
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int (*isName2)(const ENCODING *, const char *);
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int (*isName3)(const ENCODING *, const char *);
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int (*isName4)(const ENCODING *, const char *);
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int (*isNmstrt2)(const ENCODING *, const char *);
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int (*isNmstrt3)(const ENCODING *, const char *);
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int (*isNmstrt4)(const ENCODING *, const char *);
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int (*isInvalid2)(const ENCODING *, const char *);
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int (*isInvalid3)(const ENCODING *, const char *);
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int (*isInvalid4)(const ENCODING *, const char *);
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};
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#ifdef XML_MIN_SIZE
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#define STANDARD_VTABLE(E) \
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E ## byteType, \
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E ## isNameMin, \
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E ## isNmstrtMin, \
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E ## byteToAscii, \
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E ## charMatches,
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#else
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#define STANDARD_VTABLE(E) /* as nothing */
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#endif
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#define NORMAL_VTABLE(E) \
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E ## isName2, \
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E ## isName3, \
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E ## isName4, \
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E ## isNmstrt2, \
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E ## isNmstrt3, \
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E ## isNmstrt4, \
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E ## isInvalid2, \
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E ## isInvalid3, \
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E ## isInvalid4
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static int checkCharRefNumber(int);
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#include "xmltok_impl.h"
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#ifdef XML_MIN_SIZE
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#define sb_isNameMin isNever
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#define sb_isNmstrtMin isNever
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#endif
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#ifdef XML_MIN_SIZE
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#define MINBPC(enc) ((enc)->minBytesPerChar)
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#else
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/* minimum bytes per character */
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#define MINBPC(enc) 1
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#endif
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#define SB_BYTE_TYPE(enc, p) \
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(((struct normal_encoding *)(enc))->type[(unsigned char)*(p)])
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#ifdef XML_MIN_SIZE
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static
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int sb_byteType(const ENCODING *enc, const char *p)
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{
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return SB_BYTE_TYPE(enc, p);
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}
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#define BYTE_TYPE(enc, p) \
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(((const struct normal_encoding *)(enc))->byteType(enc, p))
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#else
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#define BYTE_TYPE(enc, p) SB_BYTE_TYPE(enc, p)
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#endif
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#ifdef XML_MIN_SIZE
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#define BYTE_TO_ASCII(enc, p) \
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(((const struct normal_encoding *)(enc))->byteToAscii(enc, p))
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static
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int sb_byteToAscii(const ENCODING *enc, const char *p)
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{
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return *p;
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}
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#else
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#define BYTE_TO_ASCII(enc, p) (*p)
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#endif
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#define IS_NAME_CHAR(enc, p, n) \
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(((const struct normal_encoding *)(enc))->isName ## n(enc, p))
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#define IS_NMSTRT_CHAR(enc, p, n) \
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(((const struct normal_encoding *)(enc))->isNmstrt ## n(enc, p))
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#define IS_INVALID_CHAR(enc, p, n) \
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(((const struct normal_encoding *)(enc))->isInvalid ## n(enc, p))
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#ifdef XML_MIN_SIZE
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#define IS_NAME_CHAR_MINBPC(enc, p) \
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(((const struct normal_encoding *)(enc))->isNameMin(enc, p))
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#define IS_NMSTRT_CHAR_MINBPC(enc, p) \
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(((const struct normal_encoding *)(enc))->isNmstrtMin(enc, p))
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#else
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#define IS_NAME_CHAR_MINBPC(enc, p) (0)
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#define IS_NMSTRT_CHAR_MINBPC(enc, p) (0)
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#endif
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#ifdef XML_MIN_SIZE
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#define CHAR_MATCHES(enc, p, c) \
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(((const struct normal_encoding *)(enc))->charMatches(enc, p, c))
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static
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int sb_charMatches(const ENCODING *enc, const char *p, int c)
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{
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return *p == c;
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}
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#else
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/* c is an ASCII character */
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#define CHAR_MATCHES(enc, p, c) (*(p) == c)
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#endif
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#define PREFIX(ident) normal_ ## ident
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#include "xmltok_impl.c"
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#undef MINBPC
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#undef BYTE_TYPE
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#undef BYTE_TO_ASCII
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#undef CHAR_MATCHES
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#undef IS_NAME_CHAR
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#undef IS_NAME_CHAR_MINBPC
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#undef IS_NMSTRT_CHAR
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#undef IS_NMSTRT_CHAR_MINBPC
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#undef IS_INVALID_CHAR
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enum { /* UTF8_cvalN is value of masked first byte of N byte sequence */
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UTF8_cval1 = 0x00,
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UTF8_cval2 = 0xc0,
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UTF8_cval3 = 0xe0,
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UTF8_cval4 = 0xf0
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};
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static
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void utf8_toUtf8(const ENCODING *enc,
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const char **fromP, const char *fromLim,
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char **toP, const char *toLim)
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{
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char *to;
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const char *from;
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if (fromLim - *fromP > toLim - *toP) {
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/* Avoid copying partial characters. */
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for (fromLim = *fromP + (toLim - *toP); fromLim > *fromP; fromLim--)
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if (((unsigned char)fromLim[-1] & 0xc0) != 0x80)
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break;
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}
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for (to = *toP, from = *fromP; from != fromLim; from++, to++)
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*to = *from;
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*fromP = from;
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*toP = to;
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}
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static
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void utf8_toUtf16(const ENCODING *enc,
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const char **fromP, const char *fromLim,
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unsigned short **toP, const unsigned short *toLim)
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{
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unsigned short *to = *toP;
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const char *from = *fromP;
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while (from != fromLim && to != toLim) {
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switch (((struct normal_encoding *)enc)->type[(unsigned char)*from]) {
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case BT_LEAD2:
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*to++ = ((from[0] & 0x1f) << 6) | (from[1] & 0x3f);
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from += 2;
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break;
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case BT_LEAD3:
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*to++ = ((from[0] & 0xf) << 12) | ((from[1] & 0x3f) << 6) | (from[2] & 0x3f);
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from += 3;
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break;
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case BT_LEAD4:
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{
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unsigned long n;
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if (to + 1 == toLim)
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break;
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n = ((from[0] & 0x7) << 18) | ((from[1] & 0x3f) << 12) | ((from[2] & 0x3f) << 6) | (from[3] & 0x3f);
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n -= 0x10000;
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to[0] = (unsigned short)((n >> 10) | 0xD800);
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to[1] = (unsigned short)((n & 0x3FF) | 0xDC00);
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to += 2;
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from += 4;
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}
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break;
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default:
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*to++ = *from++;
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break;
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}
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}
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*fromP = from;
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*toP = to;
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}
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#ifdef XML_NS
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static const struct normal_encoding utf8_encoding_ns = {
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{ VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
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{
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#include "asciitab.h"
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#include "utf8tab.h"
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},
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STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
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};
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#endif
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static const struct normal_encoding utf8_encoding = {
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{ VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
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{
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#define BT_COLON BT_NMSTRT
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#include "asciitab.h"
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#undef BT_COLON
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#include "utf8tab.h"
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},
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STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
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};
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#ifdef XML_NS
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static const struct normal_encoding internal_utf8_encoding_ns = {
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{ VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
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{
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#include "iasciitab.h"
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#include "utf8tab.h"
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},
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STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
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};
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#endif
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static const struct normal_encoding internal_utf8_encoding = {
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{ VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
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{
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#define BT_COLON BT_NMSTRT
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#include "iasciitab.h"
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#undef BT_COLON
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#include "utf8tab.h"
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},
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STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
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};
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static
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void latin1_toUtf8(const ENCODING *enc,
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const char **fromP, const char *fromLim,
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char **toP, const char *toLim)
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{
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for (;;) {
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unsigned char c;
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if (*fromP == fromLim)
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break;
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c = (unsigned char)**fromP;
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if (c & 0x80) {
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if (toLim - *toP < 2)
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break;
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*(*toP)++ = ((c >> 6) | UTF8_cval2);
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*(*toP)++ = ((c & 0x3f) | 0x80);
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(*fromP)++;
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}
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else {
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if (*toP == toLim)
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break;
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*(*toP)++ = *(*fromP)++;
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}
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}
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}
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static
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void latin1_toUtf16(const ENCODING *enc,
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const char **fromP, const char *fromLim,
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unsigned short **toP, const unsigned short *toLim)
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{
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while (*fromP != fromLim && *toP != toLim)
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*(*toP)++ = (unsigned char)*(*fromP)++;
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}
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#ifdef XML_NS
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static const struct normal_encoding latin1_encoding_ns = {
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{ VTABLE1, latin1_toUtf8, latin1_toUtf16, 1, 0, 0 },
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{
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#include "asciitab.h"
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#include "latin1tab.h"
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},
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STANDARD_VTABLE(sb_)
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};
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#endif
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static const struct normal_encoding latin1_encoding = {
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{ VTABLE1, latin1_toUtf8, latin1_toUtf16, 1, 0, 0 },
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{
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#define BT_COLON BT_NMSTRT
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#include "asciitab.h"
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#undef BT_COLON
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#include "latin1tab.h"
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},
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STANDARD_VTABLE(sb_)
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};
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static
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void ascii_toUtf8(const ENCODING *enc,
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const char **fromP, const char *fromLim,
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char **toP, const char *toLim)
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{
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while (*fromP != fromLim && *toP != toLim)
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*(*toP)++ = *(*fromP)++;
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}
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#ifdef XML_NS
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static const struct normal_encoding ascii_encoding_ns = {
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{ VTABLE1, ascii_toUtf8, latin1_toUtf16, 1, 1, 0 },
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{
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#include "asciitab.h"
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/* BT_NONXML == 0 */
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},
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STANDARD_VTABLE(sb_)
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};
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#endif
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static const struct normal_encoding ascii_encoding = {
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{ VTABLE1, ascii_toUtf8, latin1_toUtf16, 1, 1, 0 },
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{
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#define BT_COLON BT_NMSTRT
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#include "asciitab.h"
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#undef BT_COLON
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/* BT_NONXML == 0 */
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},
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STANDARD_VTABLE(sb_)
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};
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static int unicode_byte_type(char hi, char lo)
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{
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switch ((unsigned char)hi) {
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case 0xD8: case 0xD9: case 0xDA: case 0xDB:
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return BT_LEAD4;
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case 0xDC: case 0xDD: case 0xDE: case 0xDF:
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return BT_TRAIL;
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case 0xFF:
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switch ((unsigned char)lo) {
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case 0xFF:
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case 0xFE:
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return BT_NONXML;
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}
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break;
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}
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return BT_NONASCII;
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}
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#define DEFINE_UTF16_TO_UTF8(E) \
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static \
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void E ## toUtf8(const ENCODING *enc, \
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const char **fromP, const char *fromLim, \
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char **toP, const char *toLim) \
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{ \
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const char *from; \
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for (from = *fromP; from != fromLim; from += 2) { \
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int plane; \
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unsigned char lo2; \
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unsigned char lo = GET_LO(from); \
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unsigned char hi = GET_HI(from); \
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switch (hi) { \
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case 0: \
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if (lo < 0x80) { \
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if (*toP == toLim) { \
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*fromP = from; \
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return; \
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} \
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*(*toP)++ = lo; \
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break; \
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} \
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/* fall through */ \
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case 0x1: case 0x2: case 0x3: \
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case 0x4: case 0x5: case 0x6: case 0x7: \
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if (toLim - *toP < 2) { \
|
|
*fromP = from; \
|
|
return; \
|
|
} \
|
|
*(*toP)++ = ((lo >> 6) | (hi << 2) | UTF8_cval2); \
|
|
*(*toP)++ = ((lo & 0x3f) | 0x80); \
|
|
break; \
|
|
default: \
|
|
if (toLim - *toP < 3) { \
|
|
*fromP = from; \
|
|
return; \
|
|
} \
|
|
/* 16 bits divided 4, 6, 6 amongst 3 bytes */ \
|
|
*(*toP)++ = ((hi >> 4) | UTF8_cval3); \
|
|
*(*toP)++ = (((hi & 0xf) << 2) | (lo >> 6) | 0x80); \
|
|
*(*toP)++ = ((lo & 0x3f) | 0x80); \
|
|
break; \
|
|
case 0xD8: case 0xD9: case 0xDA: case 0xDB: \
|
|
if (toLim - *toP < 4) { \
|
|
*fromP = from; \
|
|
return; \
|
|
} \
|
|
plane = (((hi & 0x3) << 2) | ((lo >> 6) & 0x3)) + 1; \
|
|
*(*toP)++ = ((plane >> 2) | UTF8_cval4); \
|
|
*(*toP)++ = (((lo >> 2) & 0xF) | ((plane & 0x3) << 4) | 0x80); \
|
|
from += 2; \
|
|
lo2 = GET_LO(from); \
|
|
*(*toP)++ = (((lo & 0x3) << 4) \
|
|
| ((GET_HI(from) & 0x3) << 2) \
|
|
| (lo2 >> 6) \
|
|
| 0x80); \
|
|
*(*toP)++ = ((lo2 & 0x3f) | 0x80); \
|
|
break; \
|
|
} \
|
|
} \
|
|
*fromP = from; \
|
|
}
|
|
|
|
#define DEFINE_UTF16_TO_UTF16(E) \
|
|
static \
|
|
void E ## toUtf16(const ENCODING *enc, \
|
|
const char **fromP, const char *fromLim, \
|
|
unsigned short **toP, const unsigned short *toLim) \
|
|
{ \
|
|
/* Avoid copying first half only of surrogate */ \
|
|
if (fromLim - *fromP > ((toLim - *toP) << 1) \
|
|
&& (GET_HI(fromLim - 2) & 0xF8) == 0xD8) \
|
|
fromLim -= 2; \
|
|
for (; *fromP != fromLim && *toP != toLim; *fromP += 2) \
|
|
*(*toP)++ = (GET_HI(*fromP) << 8) | GET_LO(*fromP); \
|
|
}
|
|
|
|
#define SET2(ptr, ch) \
|
|
(((ptr)[0] = ((ch) & 0xff)), ((ptr)[1] = ((ch) >> 8)))
|
|
#define GET_LO(ptr) ((unsigned char)(ptr)[0])
|
|
#define GET_HI(ptr) ((unsigned char)(ptr)[1])
|
|
|
|
DEFINE_UTF16_TO_UTF8(little2_)
|
|
DEFINE_UTF16_TO_UTF16(little2_)
|
|
|
|
#undef SET2
|
|
#undef GET_LO
|
|
#undef GET_HI
|
|
|
|
#define SET2(ptr, ch) \
|
|
(((ptr)[0] = ((ch) >> 8)), ((ptr)[1] = ((ch) & 0xFF)))
|
|
#define GET_LO(ptr) ((unsigned char)(ptr)[1])
|
|
#define GET_HI(ptr) ((unsigned char)(ptr)[0])
|
|
|
|
DEFINE_UTF16_TO_UTF8(big2_)
|
|
DEFINE_UTF16_TO_UTF16(big2_)
|
|
|
|
#undef SET2
|
|
#undef GET_LO
|
|
#undef GET_HI
|
|
|
|
#define LITTLE2_BYTE_TYPE(enc, p) \
|
|
((p)[1] == 0 \
|
|
? ((struct normal_encoding *)(enc))->type[(unsigned char)*(p)] \
|
|
: unicode_byte_type((p)[1], (p)[0]))
|
|
#define LITTLE2_BYTE_TO_ASCII(enc, p) ((p)[1] == 0 ? (p)[0] : -1)
|
|
#define LITTLE2_CHAR_MATCHES(enc, p, c) ((p)[1] == 0 && (p)[0] == c)
|
|
#define LITTLE2_IS_NAME_CHAR_MINBPC(enc, p) \
|
|
UCS2_GET_NAMING(namePages, (unsigned char)p[1], (unsigned char)p[0])
|
|
#define LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p) \
|
|
UCS2_GET_NAMING(nmstrtPages, (unsigned char)p[1], (unsigned char)p[0])
|
|
|
|
#ifdef XML_MIN_SIZE
|
|
|
|
static
|
|
int little2_byteType(const ENCODING *enc, const char *p)
|
|
{
|
|
return LITTLE2_BYTE_TYPE(enc, p);
|
|
}
|
|
|
|
static
|
|
int little2_byteToAscii(const ENCODING *enc, const char *p)
|
|
{
|
|
return LITTLE2_BYTE_TO_ASCII(enc, p);
|
|
}
|
|
|
|
static
|
|
int little2_charMatches(const ENCODING *enc, const char *p, int c)
|
|
{
|
|
return LITTLE2_CHAR_MATCHES(enc, p, c);
|
|
}
|
|
|
|
static
|
|
int little2_isNameMin(const ENCODING *enc, const char *p)
|
|
{
|
|
return LITTLE2_IS_NAME_CHAR_MINBPC(enc, p);
|
|
}
|
|
|
|
static
|
|
int little2_isNmstrtMin(const ENCODING *enc, const char *p)
|
|
{
|
|
return LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p);
|
|
}
|
|
|
|
#undef VTABLE
|
|
#define VTABLE VTABLE1, little2_toUtf8, little2_toUtf16
|
|
|
|
#else /* not XML_MIN_SIZE */
|
|
|
|
#undef PREFIX
|
|
#define PREFIX(ident) little2_ ## ident
|
|
#define MINBPC(enc) 2
|
|
/* CHAR_MATCHES is guaranteed to have MINBPC bytes available. */
|
|
#define BYTE_TYPE(enc, p) LITTLE2_BYTE_TYPE(enc, p)
|
|
#define BYTE_TO_ASCII(enc, p) LITTLE2_BYTE_TO_ASCII(enc, p)
|
|
#define CHAR_MATCHES(enc, p, c) LITTLE2_CHAR_MATCHES(enc, p, c)
|
|
#define IS_NAME_CHAR(enc, p, n) 0
|
|
#define IS_NAME_CHAR_MINBPC(enc, p) LITTLE2_IS_NAME_CHAR_MINBPC(enc, p)
|
|
#define IS_NMSTRT_CHAR(enc, p, n) (0)
|
|
#define IS_NMSTRT_CHAR_MINBPC(enc, p) LITTLE2_IS_NMSTRT_CHAR_MINBPC(enc, p)
|
|
|
|
#include "xmltok_impl.c"
|
|
|
|
#undef MINBPC
|
|
#undef BYTE_TYPE
|
|
#undef BYTE_TO_ASCII
|
|
#undef CHAR_MATCHES
|
|
#undef IS_NAME_CHAR
|
|
#undef IS_NAME_CHAR_MINBPC
|
|
#undef IS_NMSTRT_CHAR
|
|
#undef IS_NMSTRT_CHAR_MINBPC
|
|
#undef IS_INVALID_CHAR
|
|
|
|
#endif /* not XML_MIN_SIZE */
|
|
|
|
#ifdef XML_NS
|
|
|
|
static const struct normal_encoding little2_encoding_ns = {
|
|
{ VTABLE, 2, 0,
|
|
#if BYTE_ORDER == 12
|
|
1
|
|
#else
|
|
0
|
|
#endif
|
|
},
|
|
{
|
|
#include "asciitab.h"
|
|
#include "latin1tab.h"
|
|
},
|
|
STANDARD_VTABLE(little2_)
|
|
};
|
|
|
|
#endif
|
|
|
|
static const struct normal_encoding little2_encoding = {
|
|
{ VTABLE, 2, 0,
|
|
#if BYTE_ORDER == 12
|
|
1
|
|
#else
|
|
0
|
|
#endif
|
|
},
|
|
{
|
|
#define BT_COLON BT_NMSTRT
|
|
#include "asciitab.h"
|
|
#undef BT_COLON
|
|
#include "latin1tab.h"
|
|
},
|
|
STANDARD_VTABLE(little2_)
|
|
};
|
|
|
|
#if BYTE_ORDER != 21
|
|
|
|
#ifdef XML_NS
|
|
|
|
static const struct normal_encoding internal_little2_encoding_ns = {
|
|
{ VTABLE, 2, 0, 1 },
|
|
{
|
|
#include "iasciitab.h"
|
|
#include "latin1tab.h"
|
|
},
|
|
STANDARD_VTABLE(little2_)
|
|
};
|
|
|
|
#endif
|
|
|
|
static const struct normal_encoding internal_little2_encoding = {
|
|
{ VTABLE, 2, 0, 1 },
|
|
{
|
|
#define BT_COLON BT_NMSTRT
|
|
#include "iasciitab.h"
|
|
#undef BT_COLON
|
|
#include "latin1tab.h"
|
|
},
|
|
STANDARD_VTABLE(little2_)
|
|
};
|
|
|
|
#endif
|
|
|
|
|
|
#define BIG2_BYTE_TYPE(enc, p) \
|
|
((p)[0] == 0 \
|
|
? ((struct normal_encoding *)(enc))->type[(unsigned char)(p)[1]] \
|
|
: unicode_byte_type((p)[0], (p)[1]))
|
|
#define BIG2_BYTE_TO_ASCII(enc, p) ((p)[0] == 0 ? (p)[1] : -1)
|
|
#define BIG2_CHAR_MATCHES(enc, p, c) ((p)[0] == 0 && (p)[1] == c)
|
|
#define BIG2_IS_NAME_CHAR_MINBPC(enc, p) \
|
|
UCS2_GET_NAMING(namePages, (unsigned char)p[0], (unsigned char)p[1])
|
|
#define BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p) \
|
|
UCS2_GET_NAMING(nmstrtPages, (unsigned char)p[0], (unsigned char)p[1])
|
|
|
|
#ifdef XML_MIN_SIZE
|
|
|
|
static
|
|
int big2_byteType(const ENCODING *enc, const char *p)
|
|
{
|
|
return BIG2_BYTE_TYPE(enc, p);
|
|
}
|
|
|
|
static
|
|
int big2_byteToAscii(const ENCODING *enc, const char *p)
|
|
{
|
|
return BIG2_BYTE_TO_ASCII(enc, p);
|
|
}
|
|
|
|
static
|
|
int big2_charMatches(const ENCODING *enc, const char *p, int c)
|
|
{
|
|
return BIG2_CHAR_MATCHES(enc, p, c);
|
|
}
|
|
|
|
static
|
|
int big2_isNameMin(const ENCODING *enc, const char *p)
|
|
{
|
|
return BIG2_IS_NAME_CHAR_MINBPC(enc, p);
|
|
}
|
|
|
|
static
|
|
int big2_isNmstrtMin(const ENCODING *enc, const char *p)
|
|
{
|
|
return BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p);
|
|
}
|
|
|
|
#undef VTABLE
|
|
#define VTABLE VTABLE1, big2_toUtf8, big2_toUtf16
|
|
|
|
#else /* not XML_MIN_SIZE */
|
|
|
|
#undef PREFIX
|
|
#define PREFIX(ident) big2_ ## ident
|
|
#define MINBPC(enc) 2
|
|
/* CHAR_MATCHES is guaranteed to have MINBPC bytes available. */
|
|
#define BYTE_TYPE(enc, p) BIG2_BYTE_TYPE(enc, p)
|
|
#define BYTE_TO_ASCII(enc, p) BIG2_BYTE_TO_ASCII(enc, p)
|
|
#define CHAR_MATCHES(enc, p, c) BIG2_CHAR_MATCHES(enc, p, c)
|
|
#define IS_NAME_CHAR(enc, p, n) 0
|
|
#define IS_NAME_CHAR_MINBPC(enc, p) BIG2_IS_NAME_CHAR_MINBPC(enc, p)
|
|
#define IS_NMSTRT_CHAR(enc, p, n) (0)
|
|
#define IS_NMSTRT_CHAR_MINBPC(enc, p) BIG2_IS_NMSTRT_CHAR_MINBPC(enc, p)
|
|
|
|
#include "xmltok_impl.c"
|
|
|
|
#undef MINBPC
|
|
#undef BYTE_TYPE
|
|
#undef BYTE_TO_ASCII
|
|
#undef CHAR_MATCHES
|
|
#undef IS_NAME_CHAR
|
|
#undef IS_NAME_CHAR_MINBPC
|
|
#undef IS_NMSTRT_CHAR
|
|
#undef IS_NMSTRT_CHAR_MINBPC
|
|
#undef IS_INVALID_CHAR
|
|
|
|
#endif /* not XML_MIN_SIZE */
|
|
|
|
#ifdef XML_NS
|
|
|
|
static const struct normal_encoding big2_encoding_ns = {
|
|
{ VTABLE, 2, 0,
|
|
#if BYTE_ORDER == 21
|
|
1
|
|
#else
|
|
0
|
|
#endif
|
|
},
|
|
{
|
|
#include "asciitab.h"
|
|
#include "latin1tab.h"
|
|
},
|
|
STANDARD_VTABLE(big2_)
|
|
};
|
|
|
|
#endif
|
|
|
|
static const struct normal_encoding big2_encoding = {
|
|
{ VTABLE, 2, 0,
|
|
#if BYTE_ORDER == 21
|
|
1
|
|
#else
|
|
0
|
|
#endif
|
|
},
|
|
{
|
|
#define BT_COLON BT_NMSTRT
|
|
#include "asciitab.h"
|
|
#undef BT_COLON
|
|
#include "latin1tab.h"
|
|
},
|
|
STANDARD_VTABLE(big2_)
|
|
};
|
|
|
|
#if BYTE_ORDER != 12
|
|
|
|
#ifdef XML_NS
|
|
|
|
static const struct normal_encoding internal_big2_encoding_ns = {
|
|
{ VTABLE, 2, 0, 1 },
|
|
{
|
|
#include "iasciitab.h"
|
|
#include "latin1tab.h"
|
|
},
|
|
STANDARD_VTABLE(big2_)
|
|
};
|
|
|
|
#endif
|
|
|
|
static const struct normal_encoding internal_big2_encoding = {
|
|
{ VTABLE, 2, 0, 1 },
|
|
{
|
|
#define BT_COLON BT_NMSTRT
|
|
#include "iasciitab.h"
|
|
#undef BT_COLON
|
|
#include "latin1tab.h"
|
|
},
|
|
STANDARD_VTABLE(big2_)
|
|
};
|
|
|
|
#endif
|
|
|
|
#undef PREFIX
|
|
|
|
static
|
|
int streqci(const char *s1, const char *s2)
|
|
{
|
|
for (;;) {
|
|
char c1 = *s1++;
|
|
char c2 = *s2++;
|
|
if ('a' <= c1 && c1 <= 'z')
|
|
c1 += 'A' - 'a';
|
|
if ('a' <= c2 && c2 <= 'z')
|
|
c2 += 'A' - 'a';
|
|
if (c1 != c2)
|
|
return 0;
|
|
if (!c1)
|
|
break;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static
|
|
void initUpdatePosition(const ENCODING *enc, const char *ptr,
|
|
const char *end, POSITION *pos)
|
|
{
|
|
normal_updatePosition(&utf8_encoding.enc, ptr, end, pos);
|
|
}
|
|
|
|
static
|
|
int toAscii(const ENCODING *enc, const char *ptr, const char *end)
|
|
{
|
|
char buf[1];
|
|
char *p = buf;
|
|
XmlUtf8Convert(enc, &ptr, end, &p, p + 1);
|
|
if (p == buf)
|
|
return -1;
|
|
else
|
|
return buf[0];
|
|
}
|
|
|
|
static
|
|
int isSpace(int c)
|
|
{
|
|
switch (c) {
|
|
case 0x20:
|
|
case 0xD:
|
|
case 0xA:
|
|
case 0x9:
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* Return 1 if there's just optional white space
|
|
or there's an S followed by name=val. */
|
|
static
|
|
int parsePseudoAttribute(const ENCODING *enc,
|
|
const char *ptr,
|
|
const char *end,
|
|
const char **namePtr,
|
|
const char **valPtr,
|
|
const char **nextTokPtr)
|
|
{
|
|
int c;
|
|
char open;
|
|
if (ptr == end) {
|
|
*namePtr = 0;
|
|
return 1;
|
|
}
|
|
if (!isSpace(toAscii(enc, ptr, end))) {
|
|
*nextTokPtr = ptr;
|
|
return 0;
|
|
}
|
|
do {
|
|
ptr += enc->minBytesPerChar;
|
|
} while (isSpace(toAscii(enc, ptr, end)));
|
|
if (ptr == end) {
|
|
*namePtr = 0;
|
|
return 1;
|
|
}
|
|
*namePtr = ptr;
|
|
for (;;) {
|
|
c = toAscii(enc, ptr, end);
|
|
if (c == -1) {
|
|
*nextTokPtr = ptr;
|
|
return 0;
|
|
}
|
|
if (c == '=')
|
|
break;
|
|
if (isSpace(c)) {
|
|
do {
|
|
ptr += enc->minBytesPerChar;
|
|
} while (isSpace(c = toAscii(enc, ptr, end)));
|
|
if (c != '=') {
|
|
*nextTokPtr = ptr;
|
|
return 0;
|
|
}
|
|
break;
|
|
}
|
|
ptr += enc->minBytesPerChar;
|
|
}
|
|
if (ptr == *namePtr) {
|
|
*nextTokPtr = ptr;
|
|
return 0;
|
|
}
|
|
ptr += enc->minBytesPerChar;
|
|
c = toAscii(enc, ptr, end);
|
|
while (isSpace(c)) {
|
|
ptr += enc->minBytesPerChar;
|
|
c = toAscii(enc, ptr, end);
|
|
}
|
|
if (c != '"' && c != '\'') {
|
|
*nextTokPtr = ptr;
|
|
return 0;
|
|
}
|
|
open = c;
|
|
ptr += enc->minBytesPerChar;
|
|
*valPtr = ptr;
|
|
for (;; ptr += enc->minBytesPerChar) {
|
|
c = toAscii(enc, ptr, end);
|
|
if (c == open)
|
|
break;
|
|
if (!('a' <= c && c <= 'z')
|
|
&& !('A' <= c && c <= 'Z')
|
|
&& !('0' <= c && c <= '9')
|
|
&& c != '.'
|
|
&& c != '-'
|
|
&& c != '_') {
|
|
*nextTokPtr = ptr;
|
|
return 0;
|
|
}
|
|
}
|
|
*nextTokPtr = ptr + enc->minBytesPerChar;
|
|
return 1;
|
|
}
|
|
|
|
static
|
|
int doParseXmlDecl(const ENCODING *(*encodingFinder)(const ENCODING *,
|
|
const char *,
|
|
const char *),
|
|
int isGeneralTextEntity,
|
|
const ENCODING *enc,
|
|
const char *ptr,
|
|
const char *end,
|
|
const char **badPtr,
|
|
const char **versionPtr,
|
|
const char **encodingName,
|
|
const ENCODING **encoding,
|
|
int *standalone)
|
|
{
|
|
const char *val = 0;
|
|
const char *name = 0;
|
|
ptr += 5 * enc->minBytesPerChar;
|
|
end -= 2 * enc->minBytesPerChar;
|
|
if (!parsePseudoAttribute(enc, ptr, end, &name, &val, &ptr) || !name) {
|
|
*badPtr = ptr;
|
|
return 0;
|
|
}
|
|
if (!XmlNameMatchesAscii(enc, name, "version")) {
|
|
if (!isGeneralTextEntity) {
|
|
*badPtr = name;
|
|
return 0;
|
|
}
|
|
}
|
|
else {
|
|
if (versionPtr)
|
|
*versionPtr = val;
|
|
if (!parsePseudoAttribute(enc, ptr, end, &name, &val, &ptr)) {
|
|
*badPtr = ptr;
|
|
return 0;
|
|
}
|
|
if (!name) {
|
|
if (isGeneralTextEntity) {
|
|
/* a TextDecl must have an EncodingDecl */
|
|
*badPtr = ptr;
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
}
|
|
if (XmlNameMatchesAscii(enc, name, "encoding")) {
|
|
int c = toAscii(enc, val, end);
|
|
if (!('a' <= c && c <= 'z') && !('A' <= c && c <= 'Z')) {
|
|
*badPtr = val;
|
|
return 0;
|
|
}
|
|
if (encodingName)
|
|
*encodingName = val;
|
|
if (encoding)
|
|
*encoding = encodingFinder(enc, val, ptr - enc->minBytesPerChar);
|
|
if (!parsePseudoAttribute(enc, ptr, end, &name, &val, &ptr)) {
|
|
*badPtr = ptr;
|
|
return 0;
|
|
}
|
|
if (!name)
|
|
return 1;
|
|
}
|
|
if (!XmlNameMatchesAscii(enc, name, "standalone") || isGeneralTextEntity) {
|
|
*badPtr = name;
|
|
return 0;
|
|
}
|
|
if (XmlNameMatchesAscii(enc, val, "yes")) {
|
|
if (standalone)
|
|
*standalone = 1;
|
|
}
|
|
else if (XmlNameMatchesAscii(enc, val, "no")) {
|
|
if (standalone)
|
|
*standalone = 0;
|
|
}
|
|
else {
|
|
*badPtr = val;
|
|
return 0;
|
|
}
|
|
while (isSpace(toAscii(enc, ptr, end)))
|
|
ptr += enc->minBytesPerChar;
|
|
if (ptr != end) {
|
|
*badPtr = ptr;
|
|
return 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static
|
|
int checkCharRefNumber(int result)
|
|
{
|
|
switch (result >> 8) {
|
|
case 0xD8: case 0xD9: case 0xDA: case 0xDB:
|
|
case 0xDC: case 0xDD: case 0xDE: case 0xDF:
|
|
return -1;
|
|
case 0:
|
|
if (latin1_encoding.type[result] == BT_NONXML)
|
|
return -1;
|
|
break;
|
|
case 0xFF:
|
|
if (result == 0xFFFE || result == 0xFFFF)
|
|
return -1;
|
|
break;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
int XmlUtf8Encode(int c, char *buf)
|
|
{
|
|
enum {
|
|
/* minN is minimum legal resulting value for N byte sequence */
|
|
min2 = 0x80,
|
|
min3 = 0x800,
|
|
min4 = 0x10000
|
|
};
|
|
|
|
if (c < 0)
|
|
return 0;
|
|
if (c < min2) {
|
|
buf[0] = (c | UTF8_cval1);
|
|
return 1;
|
|
}
|
|
if (c < min3) {
|
|
buf[0] = ((c >> 6) | UTF8_cval2);
|
|
buf[1] = ((c & 0x3f) | 0x80);
|
|
return 2;
|
|
}
|
|
if (c < min4) {
|
|
buf[0] = ((c >> 12) | UTF8_cval3);
|
|
buf[1] = (((c >> 6) & 0x3f) | 0x80);
|
|
buf[2] = ((c & 0x3f) | 0x80);
|
|
return 3;
|
|
}
|
|
if (c < 0x110000) {
|
|
buf[0] = ((c >> 18) | UTF8_cval4);
|
|
buf[1] = (((c >> 12) & 0x3f) | 0x80);
|
|
buf[2] = (((c >> 6) & 0x3f) | 0x80);
|
|
buf[3] = ((c & 0x3f) | 0x80);
|
|
return 4;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int XmlUtf16Encode(int charNum, unsigned short *buf)
|
|
{
|
|
if (charNum < 0)
|
|
return 0;
|
|
if (charNum < 0x10000) {
|
|
buf[0] = charNum;
|
|
return 1;
|
|
}
|
|
if (charNum < 0x110000) {
|
|
charNum -= 0x10000;
|
|
buf[0] = (charNum >> 10) + 0xD800;
|
|
buf[1] = (charNum & 0x3FF) + 0xDC00;
|
|
return 2;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
struct unknown_encoding {
|
|
struct normal_encoding normal;
|
|
int (*convert)(void *userData, const char *p);
|
|
void *userData;
|
|
unsigned short utf16[256];
|
|
char utf8[256][4];
|
|
};
|
|
|
|
int XmlSizeOfUnknownEncoding()
|
|
{
|
|
return sizeof(struct unknown_encoding);
|
|
}
|
|
|
|
static
|
|
int unknown_isName(const ENCODING *enc, const char *p)
|
|
{
|
|
int c = ((const struct unknown_encoding *)enc)
|
|
->convert(((const struct unknown_encoding *)enc)->userData, p);
|
|
if (c & ~0xFFFF)
|
|
return 0;
|
|
return UCS2_GET_NAMING(namePages, c >> 8, c & 0xFF);
|
|
}
|
|
|
|
static
|
|
int unknown_isNmstrt(const ENCODING *enc, const char *p)
|
|
{
|
|
int c = ((const struct unknown_encoding *)enc)
|
|
->convert(((const struct unknown_encoding *)enc)->userData, p);
|
|
if (c & ~0xFFFF)
|
|
return 0;
|
|
return UCS2_GET_NAMING(nmstrtPages, c >> 8, c & 0xFF);
|
|
}
|
|
|
|
static
|
|
int unknown_isInvalid(const ENCODING *enc, const char *p)
|
|
{
|
|
int c = ((const struct unknown_encoding *)enc)
|
|
->convert(((const struct unknown_encoding *)enc)->userData, p);
|
|
return (c & ~0xFFFF) || checkCharRefNumber(c) < 0;
|
|
}
|
|
|
|
static
|
|
void unknown_toUtf8(const ENCODING *enc,
|
|
const char **fromP, const char *fromLim,
|
|
char **toP, const char *toLim)
|
|
{
|
|
char buf[XML_UTF8_ENCODE_MAX];
|
|
for (;;) {
|
|
const char *utf8;
|
|
int n;
|
|
if (*fromP == fromLim)
|
|
break;
|
|
utf8 = ((const struct unknown_encoding *)enc)->utf8[(unsigned char)**fromP];
|
|
n = *utf8++;
|
|
if (n == 0) {
|
|
int c = ((const struct unknown_encoding *)enc)
|
|
->convert(((const struct unknown_encoding *)enc)->userData, *fromP);
|
|
n = XmlUtf8Encode(c, buf);
|
|
if (n > toLim - *toP)
|
|
break;
|
|
utf8 = buf;
|
|
*fromP += ((const struct normal_encoding *)enc)->type[(unsigned char)**fromP]
|
|
- (BT_LEAD2 - 2);
|
|
}
|
|
else {
|
|
if (n > toLim - *toP)
|
|
break;
|
|
(*fromP)++;
|
|
}
|
|
do {
|
|
*(*toP)++ = *utf8++;
|
|
} while (--n != 0);
|
|
}
|
|
}
|
|
|
|
static
|
|
void unknown_toUtf16(const ENCODING *enc,
|
|
const char **fromP, const char *fromLim,
|
|
unsigned short **toP, const unsigned short *toLim)
|
|
{
|
|
while (*fromP != fromLim && *toP != toLim) {
|
|
unsigned short c
|
|
= ((const struct unknown_encoding *)enc)->utf16[(unsigned char)**fromP];
|
|
if (c == 0) {
|
|
c = (unsigned short)((const struct unknown_encoding *)enc)
|
|
->convert(((const struct unknown_encoding *)enc)->userData, *fromP);
|
|
*fromP += ((const struct normal_encoding *)enc)->type[(unsigned char)**fromP]
|
|
- (BT_LEAD2 - 2);
|
|
}
|
|
else
|
|
(*fromP)++;
|
|
*(*toP)++ = c;
|
|
}
|
|
}
|
|
|
|
ENCODING *
|
|
XmlInitUnknownEncoding(void *mem,
|
|
int *table,
|
|
int (*convert)(void *userData, const char *p),
|
|
void *userData)
|
|
{
|
|
int i;
|
|
struct unknown_encoding *e = mem;
|
|
for (i = 0; i < sizeof(struct normal_encoding); i++)
|
|
((char *)mem)[i] = ((char *)&latin1_encoding)[i];
|
|
for (i = 0; i < 128; i++)
|
|
if (latin1_encoding.type[i] != BT_OTHER
|
|
&& latin1_encoding.type[i] != BT_NONXML
|
|
&& table[i] != i)
|
|
return 0;
|
|
for (i = 0; i < 256; i++) {
|
|
int c = table[i];
|
|
if (c == -1) {
|
|
e->normal.type[i] = BT_MALFORM;
|
|
/* This shouldn't really get used. */
|
|
e->utf16[i] = 0xFFFF;
|
|
e->utf8[i][0] = 1;
|
|
e->utf8[i][1] = 0;
|
|
}
|
|
else if (c < 0) {
|
|
if (c < -4)
|
|
return 0;
|
|
e->normal.type[i] = BT_LEAD2 - (c + 2);
|
|
e->utf8[i][0] = 0;
|
|
e->utf16[i] = 0;
|
|
}
|
|
else if (c < 0x80) {
|
|
if (latin1_encoding.type[c] != BT_OTHER
|
|
&& latin1_encoding.type[c] != BT_NONXML
|
|
&& c != i)
|
|
return 0;
|
|
e->normal.type[i] = latin1_encoding.type[c];
|
|
e->utf8[i][0] = 1;
|
|
e->utf8[i][1] = (char)c;
|
|
e->utf16[i] = c == 0 ? 0xFFFF : c;
|
|
}
|
|
else if (checkCharRefNumber(c) < 0) {
|
|
e->normal.type[i] = BT_NONXML;
|
|
/* This shouldn't really get used. */
|
|
e->utf16[i] = 0xFFFF;
|
|
e->utf8[i][0] = 1;
|
|
e->utf8[i][1] = 0;
|
|
}
|
|
else {
|
|
if (c > 0xFFFF)
|
|
return 0;
|
|
if (UCS2_GET_NAMING(nmstrtPages, c >> 8, c & 0xff))
|
|
e->normal.type[i] = BT_NMSTRT;
|
|
else if (UCS2_GET_NAMING(namePages, c >> 8, c & 0xff))
|
|
e->normal.type[i] = BT_NAME;
|
|
else
|
|
e->normal.type[i] = BT_OTHER;
|
|
e->utf8[i][0] = (char)XmlUtf8Encode(c, e->utf8[i] + 1);
|
|
e->utf16[i] = c;
|
|
}
|
|
}
|
|
e->userData = userData;
|
|
e->convert = convert;
|
|
if (convert) {
|
|
e->normal.isName2 = unknown_isName;
|
|
e->normal.isName3 = unknown_isName;
|
|
e->normal.isName4 = unknown_isName;
|
|
e->normal.isNmstrt2 = unknown_isNmstrt;
|
|
e->normal.isNmstrt3 = unknown_isNmstrt;
|
|
e->normal.isNmstrt4 = unknown_isNmstrt;
|
|
e->normal.isInvalid2 = unknown_isInvalid;
|
|
e->normal.isInvalid3 = unknown_isInvalid;
|
|
e->normal.isInvalid4 = unknown_isInvalid;
|
|
}
|
|
e->normal.enc.utf8Convert = unknown_toUtf8;
|
|
e->normal.enc.utf16Convert = unknown_toUtf16;
|
|
return &(e->normal.enc);
|
|
}
|
|
|
|
/* If this enumeration is changed, getEncodingIndex and encodings
|
|
must also be changed. */
|
|
enum {
|
|
UNKNOWN_ENC = -1,
|
|
ISO_8859_1_ENC = 0,
|
|
US_ASCII_ENC,
|
|
UTF_8_ENC,
|
|
UTF_16_ENC,
|
|
UTF_16BE_ENC,
|
|
UTF_16LE_ENC,
|
|
/* must match encodingNames up to here */
|
|
NO_ENC
|
|
};
|
|
|
|
static
|
|
int getEncodingIndex(const char *name)
|
|
{
|
|
static const char *encodingNames[] = {
|
|
"ISO-8859-1",
|
|
"US-ASCII",
|
|
"UTF-8",
|
|
"UTF-16",
|
|
"UTF-16BE"
|
|
"UTF-16LE",
|
|
};
|
|
int i;
|
|
if (name == 0)
|
|
return NO_ENC;
|
|
for (i = 0; i < sizeof(encodingNames)/sizeof(encodingNames[0]); i++)
|
|
if (streqci(name, encodingNames[i]))
|
|
return i;
|
|
return UNKNOWN_ENC;
|
|
}
|
|
|
|
/* For binary compatibility, we store the index of the encoding specified
|
|
at initialization in the isUtf16 member. */
|
|
|
|
#define INIT_ENC_INDEX(enc) ((enc)->initEnc.isUtf16)
|
|
|
|
/* This is what detects the encoding.
|
|
encodingTable maps from encoding indices to encodings;
|
|
INIT_ENC_INDEX(enc) is the index of the external (protocol) specified encoding;
|
|
state is XML_CONTENT_STATE if we're parsing an external text entity,
|
|
and XML_PROLOG_STATE otherwise.
|
|
*/
|
|
|
|
|
|
static
|
|
int initScan(const ENCODING **encodingTable,
|
|
const INIT_ENCODING *enc,
|
|
int state,
|
|
const char *ptr,
|
|
const char *end,
|
|
const char **nextTokPtr)
|
|
{
|
|
const ENCODING **encPtr;
|
|
|
|
if (ptr == end)
|
|
return XML_TOK_NONE;
|
|
encPtr = enc->encPtr;
|
|
if (ptr + 1 == end) {
|
|
/* only a single byte available for auto-detection */
|
|
/* a well-formed document entity must have more than one byte */
|
|
if (state != XML_CONTENT_STATE)
|
|
return XML_TOK_PARTIAL;
|
|
/* so we're parsing an external text entity... */
|
|
/* if UTF-16 was externally specified, then we need at least 2 bytes */
|
|
switch (INIT_ENC_INDEX(enc)) {
|
|
case UTF_16_ENC:
|
|
case UTF_16LE_ENC:
|
|
case UTF_16BE_ENC:
|
|
return XML_TOK_PARTIAL;
|
|
}
|
|
switch ((unsigned char)*ptr) {
|
|
case 0xFE:
|
|
case 0xFF:
|
|
case 0xEF: /* possibly first byte of UTF-8 BOM */
|
|
if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
|
|
&& state == XML_CONTENT_STATE)
|
|
break;
|
|
/* fall through */
|
|
case 0x00:
|
|
case 0x3C:
|
|
return XML_TOK_PARTIAL;
|
|
}
|
|
}
|
|
else {
|
|
switch (((unsigned char)ptr[0] << 8) | (unsigned char)ptr[1]) {
|
|
case 0xFEFF:
|
|
if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
|
|
&& state == XML_CONTENT_STATE)
|
|
break;
|
|
*nextTokPtr = ptr + 2;
|
|
*encPtr = encodingTable[UTF_16BE_ENC];
|
|
return XML_TOK_BOM;
|
|
/* 00 3C is handled in the default case */
|
|
case 0x3C00:
|
|
if ((INIT_ENC_INDEX(enc) == UTF_16BE_ENC
|
|
|| INIT_ENC_INDEX(enc) == UTF_16_ENC)
|
|
&& state == XML_CONTENT_STATE)
|
|
break;
|
|
*encPtr = encodingTable[UTF_16LE_ENC];
|
|
return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
|
|
case 0xFFFE:
|
|
if (INIT_ENC_INDEX(enc) == ISO_8859_1_ENC
|
|
&& state == XML_CONTENT_STATE)
|
|
break;
|
|
*nextTokPtr = ptr + 2;
|
|
*encPtr = encodingTable[UTF_16LE_ENC];
|
|
return XML_TOK_BOM;
|
|
case 0xEFBB:
|
|
/* Maybe a UTF-8 BOM (EF BB BF) */
|
|
/* If there's an explicitly specified (external) encoding
|
|
of ISO-8859-1 or some flavour of UTF-16
|
|
and this is an external text entity,
|
|
don't look for the BOM,
|
|
because it might be a legal data. */
|
|
if (state == XML_CONTENT_STATE) {
|
|
int e = INIT_ENC_INDEX(enc);
|
|
if (e == ISO_8859_1_ENC || e == UTF_16BE_ENC || e == UTF_16LE_ENC || e == UTF_16_ENC)
|
|
break;
|
|
}
|
|
if (ptr + 2 == end)
|
|
return XML_TOK_PARTIAL;
|
|
if ((unsigned char)ptr[2] == 0xBF) {
|
|
*encPtr = encodingTable[UTF_8_ENC];
|
|
return XML_TOK_BOM;
|
|
}
|
|
break;
|
|
default:
|
|
if (ptr[0] == '\0') {
|
|
/* 0 isn't a legal data character. Furthermore a document entity can only
|
|
start with ASCII characters. So the only way this can fail to be big-endian
|
|
UTF-16 if it it's an external parsed general entity that's labelled as
|
|
UTF-16LE. */
|
|
if (state == XML_CONTENT_STATE && INIT_ENC_INDEX(enc) == UTF_16LE_ENC)
|
|
break;
|
|
*encPtr = encodingTable[UTF_16BE_ENC];
|
|
return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
|
|
}
|
|
else if (ptr[1] == '\0') {
|
|
/* We could recover here in the case:
|
|
- parsing an external entity
|
|
- second byte is 0
|
|
- no externally specified encoding
|
|
- no encoding declaration
|
|
by assuming UTF-16LE. But we don't, because this would mean when
|
|
presented just with a single byte, we couldn't reliably determine
|
|
whether we needed further bytes. */
|
|
if (state == XML_CONTENT_STATE)
|
|
break;
|
|
*encPtr = encodingTable[UTF_16LE_ENC];
|
|
return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
*encPtr = encodingTable[INIT_ENC_INDEX(enc)];
|
|
return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
|
|
}
|
|
|
|
|
|
#define NS(x) x
|
|
#define ns(x) x
|
|
#include "xmltok_ns.c"
|
|
#undef NS
|
|
#undef ns
|
|
|
|
#ifdef XML_NS
|
|
|
|
#define NS(x) x ## NS
|
|
#define ns(x) x ## _ns
|
|
|
|
#include "xmltok_ns.c"
|
|
|
|
#undef NS
|
|
#undef ns
|
|
|
|
ENCODING *
|
|
XmlInitUnknownEncodingNS(void *mem,
|
|
int *table,
|
|
int (*convert)(void *userData, const char *p),
|
|
void *userData)
|
|
{
|
|
ENCODING *enc = XmlInitUnknownEncoding(mem, table, convert, userData);
|
|
if (enc)
|
|
((struct normal_encoding *)enc)->type[':'] = BT_COLON;
|
|
return enc;
|
|
}
|
|
|
|
#endif /* XML_NS */
|