672 lines
16 KiB
C
Executable File
672 lines
16 KiB
C
Executable File
#include "xmltok.h"
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#include "nametab.h"
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#define VTABLE1 \
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{ PREFIX(prologTok), PREFIX(contentTok) }, \
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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(getAtts), \
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PREFIX(charRefNumber), \
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PREFIX(updatePosition), \
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PREFIX(isPublicId)
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#define VTABLE2 \
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PREFIX(encode), \
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{ PREFIX(toUtf8) }
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#define VTABLE VTABLE1, VTABLE2
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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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struct normal_encoding {
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ENCODING enc;
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unsigned char type[256];
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};
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static const struct normal_encoding latin1_encoding;
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#define latin1tab (latin1_encoding.type)
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#include "xmltok_impl.h"
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/* minimum bytes per character */
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#define MINBPC 1
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#define BYTE_TYPE(enc, p) \
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(((struct normal_encoding *)(enc))->type[(unsigned char)*(p)])
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#define BYTE_TO_ASCII(enc, p) (*p)
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#define IS_NAME_CHAR(enc, p, n) UTF8_GET_NAMING(namePages, p, n)
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#define IS_NMSTRT_CHAR(enc, p, n) UTF8_GET_NAMING(nmstrtPages, p, n)
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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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#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_NMSTRT_CHAR
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enum {
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// cvalN is value of masked first byte of N byte sequence
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cval1 = 0x00,
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cval2 = 0xc0,
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cval3 = 0xe0,
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cval4 = 0xf0,
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// minN is minimum legal resulting value for N byte sequence
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min2 = 0x80,
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min3 = 0x800,
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min4 = 0x10000
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};
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static
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int utf8_encode(const ENCODING *enc, int c, char *buf)
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{
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if (c < 0)
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return 0;
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if (c < min2) {
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buf[0] = (c | cval1);
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return 1;
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}
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if (c < min3) {
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buf[0] = ((c >> 6) | cval2);
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buf[1] = ((c & 0x3f) | 0x80);
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return 2;
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}
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if (c < min4) {
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buf[0] = ((c >> 12) | cval3);
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buf[1] = (((c >> 6) & 0x3f) | 0x80);
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buf[2] = ((c & 0x3f) | 0x80);
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return 3;
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}
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if (c < 0x110000) {
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buf[0] = ((c >> 18) | cval4);
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buf[1] = (((c >> 12) & 0x3f) | 0x80);
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buf[2] = (((c >> 6) & 0x3f) | 0x80);
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buf[3] = ((c & 0x3f) | 0x80);
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return 3;
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}
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return 0;
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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 const struct normal_encoding utf8_encoding = {
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{ VTABLE1, utf8_encode, { utf8_toUtf8 }, 1 },
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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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};
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static const struct normal_encoding internal_utf8_encoding = {
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{ VTABLE1, utf8_encode, { utf8_toUtf8 }, 1 },
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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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};
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static
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int latin1_encode(const ENCODING *enc, int c, char *buf)
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{
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if (c < 0)
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return 0;
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if (c <= 0xFF) {
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buf[0] = (char)c;
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return 1;
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}
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return 0;
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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) | cval2);
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*(*toP)++ = ((c & 0x3f) | 0x80);
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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 const struct normal_encoding latin1_encoding = {
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{ VTABLE1, latin1_encode, { latin1_toUtf8 }, 1 },
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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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};
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#define latin1tab (latin1_encoding.type)
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#undef PREFIX
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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_ENCODE \
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static \
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int PREFIX(encode)(const ENCODING *enc, int charNum, char *buf) \
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{ \
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if (charNum < 0) \
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return 0; \
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if (charNum < 0x10000) { \
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SET2(buf, charNum); \
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return 2; \
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} \
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if (charNum < 0x110000) { \
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charNum -= 0x10000; \
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SET2(buf, (charNum >> 10) + 0xD800); \
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SET2(buf + 2, (charNum & 0x3FF) + 0xDC00); \
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return 4; \
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} \
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return 0; \
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}
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#define DEFINE_UTF16_TO_UTF8 \
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static \
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void PREFIX(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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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 (*toP == toLim) \
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return; \
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*(*toP)++ = lo; \
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break; \
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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) \
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return; \
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*(*toP)++ = ((lo >> 6) | (hi << 2) | cval2); \
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*(*toP)++ = ((lo & 0x3f) | 0x80); \
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break; \
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default: \
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if (toLim - *toP < 3) \
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return; \
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/* 16 bits divided 4, 6, 6 amongst 3 bytes */ \
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*(*toP)++ = ((hi >> 4) | cval3); \
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*(*toP)++ = (((hi & 0xf) << 2) | (lo >> 6) | 0x80); \
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*(*toP)++ = ((lo & 0x3f) | 0x80); \
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break; \
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case 0xD8: case 0xD9: case 0xDA: case 0xDB: \
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if (toLim - *toP < 4) \
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return; \
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/* IIIIIIWW XXXXXXYY IIIIIIYY YYZZZZZ => */ \
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/* JJJJJJWW JJXXXXXX JJYYYYYY JJZZZZZ */ \
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*(*toP)++ = ((hi & 0x3) | cval4); \
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*(*toP)++ = ((lo >> 2) | 0x80); \
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from += 2; \
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lo2 = GET_LO(from); \
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*(*toP)++ = (((lo & 0x3) << 4) \
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| ((GET_HI(from) & 0x3) << 2) \
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| (lo2 >> 6) \
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| 0x80); \
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*(*toP)++ = ((lo2 & 0x3f) | 0x80); \
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break; \
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} \
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} \
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}
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#define PREFIX(ident) little2_ ## ident
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#define MINBPC 2
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#define BYTE_TYPE(enc, p) \
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((p)[1] == 0 ? latin1tab[(unsigned char)*(p)] : unicode_byte_type((p)[1], (p)[0]))
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#define BYTE_TO_ASCII(enc, p) ((p)[1] == 0 ? (p)[0] : -1)
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#define CHAR_MATCHES(enc, p, c) ((p)[1] == 0 && (p)[0] == c)
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#define IS_NAME_CHAR(enc, p, n) \
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UCS2_GET_NAMING(namePages, (unsigned char)p[1], (unsigned char)p[0])
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#define IS_NMSTRT_CHAR(enc, p, n) \
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UCS2_GET_NAMING(nmstrtPages, (unsigned char)p[1], (unsigned char)p[0])
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#include "xmltok_impl.c"
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#define SET2(ptr, ch) \
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(((ptr)[0] = ((ch) & 0xff)), ((ptr)[1] = ((ch) >> 8)))
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#define GET_LO(ptr) ((unsigned char)(ptr)[0])
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#define GET_HI(ptr) ((unsigned char)(ptr)[1])
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DEFINE_UTF16_ENCODE
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DEFINE_UTF16_TO_UTF8
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#undef SET2
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#undef GET_LO
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#undef GET_HI
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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_NMSTRT_CHAR
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static const struct encoding little2_encoding = { VTABLE, 2 };
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#undef PREFIX
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#define PREFIX(ident) big2_ ## ident
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#define MINBPC 2
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/* CHAR_MATCHES is guaranteed to have MINBPC bytes available. */
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#define BYTE_TYPE(enc, p) \
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((p)[0] == 0 ? latin1tab[(unsigned char)(p)[1]] : unicode_byte_type((p)[0], (p)[1]))
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#define BYTE_TO_ASCII(enc, p) ((p)[0] == 0 ? (p)[1] : -1)
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#define CHAR_MATCHES(enc, p, c) ((p)[0] == 0 && (p)[1] == c)
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#define IS_NAME_CHAR(enc, p, n) \
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UCS2_GET_NAMING(namePages, (unsigned char)p[0], (unsigned char)p[1])
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#define IS_NMSTRT_CHAR(enc, p, n) \
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UCS2_GET_NAMING(nmstrtPages, (unsigned char)p[0], (unsigned char)p[1])
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#include "xmltok_impl.c"
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#define SET2(ptr, ch) \
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(((ptr)[0] = ((ch) >> 8)), ((ptr)[1] = ((ch) & 0xFF)))
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#define GET_LO(ptr) ((unsigned char)(ptr)[1])
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#define GET_HI(ptr) ((unsigned char)(ptr)[0])
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DEFINE_UTF16_ENCODE
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DEFINE_UTF16_TO_UTF8
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#undef SET2
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#undef GET_LO
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#undef GET_HI
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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_NMSTRT_CHAR
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static const struct encoding big2_encoding = { VTABLE, 2 };
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#undef PREFIX
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static
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int initScan(const ENCODING *enc, int state, const char *ptr, const char *end,
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const char **nextTokPtr)
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{
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const ENCODING **encPtr;
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if (ptr == end)
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return XML_TOK_NONE;
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encPtr = ((const INIT_ENCODING *)enc)->encPtr;
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if (ptr + 1 == end) {
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switch ((unsigned char)*ptr) {
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case 0xFE:
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case 0xFF:
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case 0x00:
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case 0x3C:
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return XML_TOK_PARTIAL;
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}
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}
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else {
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switch (((unsigned char)ptr[0] << 8) | (unsigned char)ptr[1]) {
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case 0x003C:
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*encPtr = &big2_encoding;
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return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
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case 0xFEFF:
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*nextTokPtr = ptr + 2;
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*encPtr = &big2_encoding;
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return XML_TOK_BOM;
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case 0x3C00:
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*encPtr = &little2_encoding;
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return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
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case 0xFFFE:
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*nextTokPtr = ptr + 2;
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*encPtr = &little2_encoding;
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return XML_TOK_BOM;
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}
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}
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*encPtr = &utf8_encoding.enc;
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return XmlTok(*encPtr, state, ptr, end, nextTokPtr);
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}
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static
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int initScanProlog(const ENCODING *enc, const char *ptr, const char *end,
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const char **nextTokPtr)
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{
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return initScan(enc, XML_PROLOG_STATE, ptr, end, nextTokPtr);
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}
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static
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int initScanContent(const ENCODING *enc, const char *ptr, const char *end,
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const char **nextTokPtr)
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{
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return initScan(enc, XML_CONTENT_STATE, ptr, end, nextTokPtr);
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}
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static
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void initUpdatePosition(const ENCODING *enc, const char *ptr,
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const char *end, POSITION *pos)
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{
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normal_updatePosition(&utf8_encoding.enc, ptr, end, pos);
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}
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const ENCODING *XmlGetInternalEncoding(int e)
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{
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switch (e) {
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case XML_UTF8_ENCODING:
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return &internal_utf8_encoding.enc;
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}
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return 0;
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}
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void XmlInitEncoding(INIT_ENCODING *p, const ENCODING **encPtr)
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{
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p->initEnc.scanners[XML_PROLOG_STATE] = initScanProlog;
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p->initEnc.scanners[XML_CONTENT_STATE] = initScanContent;
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p->initEnc.updatePosition = initUpdatePosition;
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p->initEnc.minBytesPerChar = 1;
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p->encPtr = encPtr;
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*encPtr = &(p->initEnc);
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}
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static
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int toAscii(const ENCODING *enc, const char *ptr, const char *end)
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{
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char buf[1];
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char *p = buf;
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XmlConvert(enc, XML_UTF8_ENCODING, &ptr, end, &p, p + 1);
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if (p == buf)
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return -1;
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else
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return buf[0];
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}
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static
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int isSpace(int c)
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{
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switch (c) {
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case ' ':
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case '\r':
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case '\n':
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case '\t':
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return 1;
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}
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return 0;
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}
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/* Return 1 if there's just optional white space
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or there's an S followed by name=val. */
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static
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int parsePseudoAttribute(const ENCODING *enc,
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const char *ptr,
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const char *end,
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const char **namePtr,
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const char **valPtr,
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const char **nextTokPtr)
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{
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int c;
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char open;
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if (ptr == end) {
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*namePtr = 0;
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return 1;
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}
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if (!isSpace(toAscii(enc, ptr, end))) {
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*nextTokPtr = ptr;
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return 0;
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}
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do {
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ptr += enc->minBytesPerChar;
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} while (isSpace(toAscii(enc, ptr, end)));
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if (ptr == end) {
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*namePtr = 0;
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return 1;
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}
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*namePtr = ptr;
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for (;;) {
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c = toAscii(enc, ptr, end);
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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 streq(const char *s1, const char *s2)
|
|
{
|
|
for (; *s1 == *s2; s1++, s2++)
|
|
if (!*s1)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
static
|
|
const ENCODING *findEncoding(const ENCODING *enc, const char *ptr, const char *end)
|
|
{
|
|
#define ENCODING_MAX 128
|
|
char buf[ENCODING_MAX];
|
|
char *p = buf;
|
|
int i;
|
|
XmlConvert(enc, XML_UTF8_ENCODING, &ptr, end, &p, p + ENCODING_MAX - 1);
|
|
if (ptr != end)
|
|
return 0;
|
|
*p = 0;
|
|
for (i = 0; buf[i]; i++) {
|
|
if ('a' <= buf[i] && buf[i] <= 'z')
|
|
buf[i] += 'A' - 'a';
|
|
}
|
|
if (streq(buf, "UTF-8"))
|
|
return &utf8_encoding.enc;
|
|
if (streq(buf, "ISO-8859-1"))
|
|
return &latin1_encoding.enc;
|
|
if (streq(buf, "UTF-16")) {
|
|
static const unsigned short n = 1;
|
|
if (enc->minBytesPerChar == 2)
|
|
return enc;
|
|
if (*(const char *)&n)
|
|
return &little2_encoding;
|
|
else
|
|
return &big2_encoding;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int XmlParseXmlDecl(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)
|
|
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 = findEncoding(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;
|
|
}
|