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libexpat/expat/xmltok/xmltok.c
Fred L. Drake, Jr. bb4a4de066 I'm not really sure why this version of the file is still here, but 
migrate the UTF-8 BOM fix here as well, so this does not get too far
out of sync.
2001-07-27 13:59:00 +00:00

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/*
Copyright (c) 1998, 1999 Thai Open Source Software Center Ltd
See the file COPYING for copying permission.
*/
#include "xmldef.h"
#include "xmltok.h"
#include "nametab.h"
#ifdef XML_DTD
#define IGNORE_SECTION_TOK_VTABLE , PREFIX(ignoreSectionTok)
#else
#define IGNORE_SECTION_TOK_VTABLE /* as nothing */
#endif
#define VTABLE1 \
{ PREFIX(prologTok), PREFIX(contentTok), \
PREFIX(cdataSectionTok) IGNORE_SECTION_TOK_VTABLE }, \
{ PREFIX(attributeValueTok), PREFIX(entityValueTok) }, \
PREFIX(sameName), \
PREFIX(nameMatchesAscii), \
PREFIX(nameLength), \
PREFIX(skipS), \
PREFIX(getAtts), \
PREFIX(charRefNumber), \
PREFIX(predefinedEntityName), \
PREFIX(updatePosition), \
PREFIX(isPublicId)
#define VTABLE VTABLE1, PREFIX(toUtf8), PREFIX(toUtf16)
#define UCS2_GET_NAMING(pages, hi, lo) \
(namingBitmap[(pages[hi] << 3) + ((lo) >> 5)] & (1 << ((lo) & 0x1F)))
/* A 2 byte UTF-8 representation splits the characters 11 bits
between the bottom 5 and 6 bits of the bytes.
We need 8 bits to index into pages, 3 bits to add to that index and
5 bits to generate the mask. */
#define UTF8_GET_NAMING2(pages, byte) \
(namingBitmap[((pages)[(((byte)[0]) >> 2) & 7] << 3) \
+ ((((byte)[0]) & 3) << 1) \
+ ((((byte)[1]) >> 5) & 1)] \
& (1 << (((byte)[1]) & 0x1F)))
/* A 3 byte UTF-8 representation splits the characters 16 bits
between the bottom 4, 6 and 6 bits of the bytes.
We need 8 bits to index into pages, 3 bits to add to that index and
5 bits to generate the mask. */
#define UTF8_GET_NAMING3(pages, byte) \
(namingBitmap[((pages)[((((byte)[0]) & 0xF) << 4) \
+ ((((byte)[1]) >> 2) & 0xF)] \
<< 3) \
+ ((((byte)[1]) & 3) << 1) \
+ ((((byte)[2]) >> 5) & 1)] \
& (1 << (((byte)[2]) & 0x1F)))
#define UTF8_GET_NAMING(pages, p, n) \
((n) == 2 \
? UTF8_GET_NAMING2(pages, (const unsigned char *)(p)) \
: ((n) == 3 \
? UTF8_GET_NAMING3(pages, (const unsigned char *)(p)) \
: 0))
#define UTF8_INVALID3(p) \
((*p) == 0xED \
? (((p)[1] & 0x20) != 0) \
: ((*p) == 0xEF \
? ((p)[1] == 0xBF && ((p)[2] == 0xBF || (p)[2] == 0xBE)) \
: 0))
#define UTF8_INVALID4(p) ((*p) == 0xF4 && ((p)[1] & 0x30) != 0)
static
int isNever(const ENCODING *enc, const char *p)
{
return 0;
}
static
int utf8_isName2(const ENCODING *enc, const char *p)
{
return UTF8_GET_NAMING2(namePages, (const unsigned char *)p);
}
static
int utf8_isName3(const ENCODING *enc, const char *p)
{
return UTF8_GET_NAMING3(namePages, (const unsigned char *)p);
}
#define utf8_isName4 isNever
static
int utf8_isNmstrt2(const ENCODING *enc, const char *p)
{
return UTF8_GET_NAMING2(nmstrtPages, (const unsigned char *)p);
}
static
int utf8_isNmstrt3(const ENCODING *enc, const char *p)
{
return UTF8_GET_NAMING3(nmstrtPages, (const unsigned char *)p);
}
#define utf8_isNmstrt4 isNever
#define utf8_isInvalid2 isNever
static
int utf8_isInvalid3(const ENCODING *enc, const char *p)
{
return UTF8_INVALID3((const unsigned char *)p);
}
static
int utf8_isInvalid4(const ENCODING *enc, const char *p)
{
return UTF8_INVALID4((const unsigned char *)p);
}
struct normal_encoding {
ENCODING enc;
unsigned char type[256];
#ifdef XML_MIN_SIZE
int (*byteType)(const ENCODING *, const char *);
int (*isNameMin)(const ENCODING *, const char *);
int (*isNmstrtMin)(const ENCODING *, const char *);
int (*byteToAscii)(const ENCODING *, const char *);
int (*charMatches)(const ENCODING *, const char *, int);
#endif /* XML_MIN_SIZE */
int (*isName2)(const ENCODING *, const char *);
int (*isName3)(const ENCODING *, const char *);
int (*isName4)(const ENCODING *, const char *);
int (*isNmstrt2)(const ENCODING *, const char *);
int (*isNmstrt3)(const ENCODING *, const char *);
int (*isNmstrt4)(const ENCODING *, const char *);
int (*isInvalid2)(const ENCODING *, const char *);
int (*isInvalid3)(const ENCODING *, const char *);
int (*isInvalid4)(const ENCODING *, const char *);
};
#ifdef XML_MIN_SIZE
#define STANDARD_VTABLE(E) \
E ## byteType, \
E ## isNameMin, \
E ## isNmstrtMin, \
E ## byteToAscii, \
E ## charMatches,
#else
#define STANDARD_VTABLE(E) /* as nothing */
#endif
#define NORMAL_VTABLE(E) \
E ## isName2, \
E ## isName3, \
E ## isName4, \
E ## isNmstrt2, \
E ## isNmstrt3, \
E ## isNmstrt4, \
E ## isInvalid2, \
E ## isInvalid3, \
E ## isInvalid4
static int checkCharRefNumber(int);
#include "xmltok_impl.h"
#include "ascii.h"
#ifdef XML_MIN_SIZE
#define sb_isNameMin isNever
#define sb_isNmstrtMin isNever
#endif
#ifdef XML_MIN_SIZE
#define MINBPC(enc) ((enc)->minBytesPerChar)
#else
/* minimum bytes per character */
#define MINBPC(enc) 1
#endif
#define SB_BYTE_TYPE(enc, p) \
(((struct normal_encoding *)(enc))->type[(unsigned char)*(p)])
#ifdef XML_MIN_SIZE
static
int sb_byteType(const ENCODING *enc, const char *p)
{
return SB_BYTE_TYPE(enc, p);
}
#define BYTE_TYPE(enc, p) \
(((const struct normal_encoding *)(enc))->byteType(enc, p))
#else
#define BYTE_TYPE(enc, p) SB_BYTE_TYPE(enc, p)
#endif
#ifdef XML_MIN_SIZE
#define BYTE_TO_ASCII(enc, p) \
(((const struct normal_encoding *)(enc))->byteToAscii(enc, p))
static
int sb_byteToAscii(const ENCODING *enc, const char *p)
{
return *p;
}
#else
#define BYTE_TO_ASCII(enc, p) (*(p))
#endif
#define IS_NAME_CHAR(enc, p, n) \
(((const struct normal_encoding *)(enc))->isName ## n(enc, p))
#define IS_NMSTRT_CHAR(enc, p, n) \
(((const struct normal_encoding *)(enc))->isNmstrt ## n(enc, p))
#define IS_INVALID_CHAR(enc, p, n) \
(((const struct normal_encoding *)(enc))->isInvalid ## n(enc, p))
#ifdef XML_MIN_SIZE
#define IS_NAME_CHAR_MINBPC(enc, p) \
(((const struct normal_encoding *)(enc))->isNameMin(enc, p))
#define IS_NMSTRT_CHAR_MINBPC(enc, p) \
(((const struct normal_encoding *)(enc))->isNmstrtMin(enc, p))
#else
#define IS_NAME_CHAR_MINBPC(enc, p) (0)
#define IS_NMSTRT_CHAR_MINBPC(enc, p) (0)
#endif
#ifdef XML_MIN_SIZE
#define CHAR_MATCHES(enc, p, c) \
(((const struct normal_encoding *)(enc))->charMatches(enc, p, c))
static
int sb_charMatches(const ENCODING *enc, const char *p, int c)
{
return *p == c;
}
#else
/* c is an ASCII character */
#define CHAR_MATCHES(enc, p, c) (*(p) == c)
#endif
#define PREFIX(ident) normal_ ## ident
#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
enum { /* UTF8_cvalN is value of masked first byte of N byte sequence */
UTF8_cval1 = 0x00,
UTF8_cval2 = 0xc0,
UTF8_cval3 = 0xe0,
UTF8_cval4 = 0xf0
};
static
void utf8_toUtf8(const ENCODING *enc,
const char **fromP, const char *fromLim,
char **toP, const char *toLim)
{
char *to;
const char *from;
if (fromLim - *fromP > toLim - *toP) {
/* Avoid copying partial characters. */
for (fromLim = *fromP + (toLim - *toP); fromLim > *fromP; fromLim--)
if (((unsigned char)fromLim[-1] & 0xc0) != 0x80)
break;
}
for (to = *toP, from = *fromP; from != fromLim; from++, to++)
*to = *from;
*fromP = from;
*toP = to;
}
static
void utf8_toUtf16(const ENCODING *enc,
const char **fromP, const char *fromLim,
unsigned short **toP, const unsigned short *toLim)
{
unsigned short *to = *toP;
const char *from = *fromP;
while (from != fromLim && to != toLim) {
switch (((struct normal_encoding *)enc)->type[(unsigned char)*from]) {
case BT_LEAD2:
*to++ = ((from[0] & 0x1f) << 6) | (from[1] & 0x3f);
from += 2;
break;
case BT_LEAD3:
*to++ = ((from[0] & 0xf) << 12) | ((from[1] & 0x3f) << 6) | (from[2] & 0x3f);
from += 3;
break;
case BT_LEAD4:
{
unsigned long n;
if (to + 1 == toLim)
break;
n = ((from[0] & 0x7) << 18) | ((from[1] & 0x3f) << 12) | ((from[2] & 0x3f) << 6) | (from[3] & 0x3f);
n -= 0x10000;
to[0] = (unsigned short)((n >> 10) | 0xD800);
to[1] = (unsigned short)((n & 0x3FF) | 0xDC00);
to += 2;
from += 4;
}
break;
default:
*to++ = *from++;
break;
}
}
*fromP = from;
*toP = to;
}
#ifdef XML_NS
static const struct normal_encoding utf8_encoding_ns = {
{ VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
{
#include "asciitab.h"
#include "utf8tab.h"
},
STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
};
#endif
static const struct normal_encoding utf8_encoding = {
{ VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
{
#define BT_COLON BT_NMSTRT
#include "asciitab.h"
#undef BT_COLON
#include "utf8tab.h"
},
STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
};
#ifdef XML_NS
static const struct normal_encoding internal_utf8_encoding_ns = {
{ VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
{
#include "iasciitab.h"
#include "utf8tab.h"
},
STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
};
#endif
static const struct normal_encoding internal_utf8_encoding = {
{ VTABLE1, utf8_toUtf8, utf8_toUtf16, 1, 1, 0 },
{
#define BT_COLON BT_NMSTRT
#include "iasciitab.h"
#undef BT_COLON
#include "utf8tab.h"
},
STANDARD_VTABLE(sb_) NORMAL_VTABLE(utf8_)
};
static
void latin1_toUtf8(const ENCODING *enc,
const char **fromP, const char *fromLim,
char **toP, const char *toLim)
{
for (;;) {
unsigned char c;
if (*fromP == fromLim)
break;
c = (unsigned char)**fromP;
if (c & 0x80) {
if (toLim - *toP < 2)
break;
*(*toP)++ = ((c >> 6) | UTF8_cval2);
*(*toP)++ = ((c & 0x3f) | 0x80);
(*fromP)++;
}
else {
if (*toP == toLim)
break;
*(*toP)++ = *(*fromP)++;
}
}
}
static
void latin1_toUtf16(const ENCODING *enc,
const char **fromP, const char *fromLim,
unsigned short **toP, const unsigned short *toLim)
{
while (*fromP != fromLim && *toP != toLim)
*(*toP)++ = (unsigned char)*(*fromP)++;
}
#ifdef XML_NS
static const struct normal_encoding latin1_encoding_ns = {
{ VTABLE1, latin1_toUtf8, latin1_toUtf16, 1, 0, 0 },
{
#include "asciitab.h"
#include "latin1tab.h"
},
STANDARD_VTABLE(sb_)
};
#endif
static const struct normal_encoding latin1_encoding = {
{ VTABLE1, latin1_toUtf8, latin1_toUtf16, 1, 0, 0 },
{
#define BT_COLON BT_NMSTRT
#include "asciitab.h"
#undef BT_COLON
#include "latin1tab.h"
},
STANDARD_VTABLE(sb_)
};
static
void ascii_toUtf8(const ENCODING *enc,
const char **fromP, const char *fromLim,
char **toP, const char *toLim)
{
while (*fromP != fromLim && *toP != toLim)
*(*toP)++ = *(*fromP)++;
}
#ifdef XML_NS
static const struct normal_encoding ascii_encoding_ns = {
{ VTABLE1, ascii_toUtf8, latin1_toUtf16, 1, 1, 0 },
{
#include "asciitab.h"
/* BT_NONXML == 0 */
},
STANDARD_VTABLE(sb_)
};
#endif
static const struct normal_encoding ascii_encoding = {
{ VTABLE1, ascii_toUtf8, latin1_toUtf16, 1, 1, 0 },
{
#define BT_COLON BT_NMSTRT
#include "asciitab.h"
#undef BT_COLON
/* BT_NONXML == 0 */
},
STANDARD_VTABLE(sb_)
};
static int unicode_byte_type(char hi, char lo)
{
switch ((unsigned char)hi) {
case 0xD8: case 0xD9: case 0xDA: case 0xDB:
return BT_LEAD4;
case 0xDC: case 0xDD: case 0xDE: case 0xDF:
return BT_TRAIL;
case 0xFF:
switch ((unsigned char)lo) {
case 0xFF:
case 0xFE:
return BT_NONXML;
}
break;
}
return BT_NONASCII;
}
#define DEFINE_UTF16_TO_UTF8(E) \
static \
void E ## toUtf8(const ENCODING *enc, \
const char **fromP, const char *fromLim, \
char **toP, const char *toLim) \
{ \
const char *from; \
for (from = *fromP; from != fromLim; from += 2) { \
int plane; \
unsigned char lo2; \
unsigned char lo = GET_LO(from); \
unsigned char hi = GET_HI(from); \
switch (hi) { \
case 0: \
if (lo < 0x80) { \
if (*toP == toLim) { \
*fromP = from; \
return; \
} \
*(*toP)++ = lo; \
break; \
} \
/* fall through */ \
case 0x1: case 0x2: case 0x3: \
case 0x4: case 0x5: case 0x6: case 0x7: \
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 XML_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 XML_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 XML_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 XML_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 XML_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 XML_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 (ASCII_a <= c1 && c1 <= ASCII_z)
c1 += ASCII_A - ASCII_a;
if (ASCII_a <= c2 && c2 <= ASCII_z)
c2 += ASCII_A - ASCII_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 **nameEndPtr,
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 == ASCII_EQUALS) {
*nameEndPtr = ptr;
break;
}
if (isSpace(c)) {
*nameEndPtr = ptr;
do {
ptr += enc->minBytesPerChar;
} while (isSpace(c = toAscii(enc, ptr, end)));
if (c != ASCII_EQUALS) {
*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 != ASCII_QUOT && c != ASCII_APOS) {
*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 (!(ASCII_a <= c && c <= ASCII_z)
&& !(ASCII_A <= c && c <= ASCII_Z)
&& !(ASCII_0 <= c && c <= ASCII_9)
&& c != ASCII_PERIOD
&& c != ASCII_MINUS
&& c != ASCII_UNDERSCORE) {
*nextTokPtr = ptr;
return 0;
}
}
*nextTokPtr = ptr + enc->minBytesPerChar;
return 1;
}
static const char KW_version[] = {
ASCII_v, ASCII_e, ASCII_r, ASCII_s, ASCII_i, ASCII_o, ASCII_n, '\0'
};
static const char KW_encoding[] = {
ASCII_e, ASCII_n, ASCII_c, ASCII_o, ASCII_d, ASCII_i, ASCII_n, ASCII_g, '\0'
};
static const char KW_standalone[] = {
ASCII_s, ASCII_t, ASCII_a, ASCII_n, ASCII_d, ASCII_a, ASCII_l, ASCII_o, ASCII_n, ASCII_e, '\0'
};
static const char KW_yes[] = {
ASCII_y, ASCII_e, ASCII_s, '\0'
};
static const char KW_no[] = {
ASCII_n, ASCII_o, '\0'
};
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;
const char *nameEnd = 0;
ptr += 5 * enc->minBytesPerChar;
end -= 2 * enc->minBytesPerChar;
if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr) || !name) {
*badPtr = ptr;
return 0;
}
if (!XmlNameMatchesAscii(enc, name, nameEnd, KW_version)) {
if (!isGeneralTextEntity) {
*badPtr = name;
return 0;
}
}
else {
if (versionPtr)
*versionPtr = val;
if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &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, nameEnd, KW_encoding)) {
int c = toAscii(enc, val, end);
if (!(ASCII_a <= c && c <= ASCII_z) && !(ASCII_A <= c && c <= ASCII_Z)) {
*badPtr = val;
return 0;
}
if (encodingName)
*encodingName = val;
if (encoding)
*encoding = encodingFinder(enc, val, ptr - enc->minBytesPerChar);
if (!parsePseudoAttribute(enc, ptr, end, &name, &nameEnd, &val, &ptr)) {
*badPtr = ptr;
return 0;
}
if (!name)
return 1;
}
if (!XmlNameMatchesAscii(enc, name, nameEnd, KW_standalone) || isGeneralTextEntity) {
*badPtr = name;
return 0;
}
if (XmlNameMatchesAscii(enc, val, ptr - enc->minBytesPerChar, KW_yes)) {
if (standalone)
*standalone = 1;
}
else if (XmlNameMatchesAscii(enc, val, ptr - enc->minBytesPerChar, KW_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(void)
{
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 < (int)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 const char KW_ISO_8859_1[] = {
ASCII_I, ASCII_S, ASCII_O, ASCII_MINUS, ASCII_8, ASCII_8, ASCII_5, ASCII_9, ASCII_MINUS, ASCII_1, '\0'
};
static const char KW_US_ASCII[] = {
ASCII_U, ASCII_S, ASCII_MINUS, ASCII_A, ASCII_S, ASCII_C, ASCII_I, ASCII_I, '\0'
};
static const char KW_UTF_8[] = {
ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_8, '\0'
};
static const char KW_UTF_16[] = {
ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, '\0'
};
static const char KW_UTF_16BE[] = {
ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, ASCII_B, ASCII_E, '\0'
};
static const char KW_UTF_16LE[] = {
ASCII_U, ASCII_T, ASCII_F, ASCII_MINUS, ASCII_1, ASCII_6, ASCII_L, ASCII_E, '\0'
};
static
int getEncodingIndex(const char *name)
{
static const char *encodingNames[] = {
KW_ISO_8859_1,
KW_US_ASCII,
KW_UTF_8,
KW_UTF_16,
KW_UTF_16BE,
KW_UTF_16LE,
};
int i;
if (name == 0)
return NO_ENC;
for (i = 0; i < (int)(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) ((int)(enc)->initEnc.isUtf16)
#define SET_INIT_ENC_INDEX(enc, i) ((enc)->initEnc.isUtf16 = (char)i)
/* 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 */
#ifndef XML_DTD /* FIXME */
/* a well-formed document entity must have more than one byte */
if (state != XML_CONTENT_STATE)
return XML_TOK_PARTIAL;
#endif
/* 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) {
*nextTokPtr = ptr + 3;
*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[ASCII_COLON] = BT_COLON;
return enc;
}
#endif /* XML_NS */
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