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xml_fasterxml.c
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xml_fasterxml.c
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/**
XML parsing engine implementation.
Copyright (C) Microsoft Corporation.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Uefi.h> // UEFI base types
#include <Library/MemoryAllocationLib.h> // Memory allocation
#include <Library/BaseLib.h> // Safe string functions
#include <Library/DebugLib.h> // DEBUG tracing
#include <Library/BaseMemoryLib.h> // SetMem()
#include "fasterxml.h" // XML Engine
#include "xmlerr.h" // XML Errors.
#include "xmlstructure.h" // XML structures
typedef const void *PCVOID;
const XML_SIMPLE_STRING xss_CDATA = CONSTANT_XML_SIMPLE_STRING (L"CDATA");
const XML_SIMPLE_STRING xss_xml = CONSTANT_XML_SIMPLE_STRING (L"xml");
const XML_SIMPLE_STRING xss_encoding = CONSTANT_XML_SIMPLE_STRING (L"encoding");
const XML_SIMPLE_STRING xss_standalone = CONSTANT_XML_SIMPLE_STRING (L"standalone");
const XML_SIMPLE_STRING xss_version = CONSTANT_XML_SIMPLE_STRING (L"version");
const XML_SIMPLE_STRING xss_xmlns = CONSTANT_XML_SIMPLE_STRING (L"xmlns");
const XML_SIMPLE_STRING xss_DOCTYPE = CONSTANT_XML_SIMPLE_STRING (L"DOCTYPE");
const XML_SIMPLE_STRING xss_ELEMENT = CONSTANT_XML_SIMPLE_STRING (L"ELEMENT");
const XML_SIMPLE_STRING xss_ATTLIST = CONSTANT_XML_SIMPLE_STRING (L"ATTLIST");
const XML_SIMPLE_STRING xss_NOTATION = CONSTANT_XML_SIMPLE_STRING (L"NOTATION");
const XML_SIMPLE_STRING xss_ENTITY = CONSTANT_XML_SIMPLE_STRING (L"ENTITY");
const XML_SIMPLE_STRING xss_NDATA = CONSTANT_XML_SIMPLE_STRING (L"NDATA");
const XML_SIMPLE_STRING xss_PUBLIC = CONSTANT_XML_SIMPLE_STRING (L"PUBLIC");
const XML_SIMPLE_STRING xss_SYSTEM = CONSTANT_XML_SIMPLE_STRING (L"SYSTEM");
const XML_SIMPLE_STRING xss_ID = CONSTANT_XML_SIMPLE_STRING (L"ID");
const XML_SIMPLE_STRING xss_IDREF = CONSTANT_XML_SIMPLE_STRING (L"IDREF");
const XML_SIMPLE_STRING xss_IDREFS = CONSTANT_XML_SIMPLE_STRING (L"IDREFS");
const XML_SIMPLE_STRING xss_ENTITIES = CONSTANT_XML_SIMPLE_STRING (L"ENTITIES");
const XML_SIMPLE_STRING xss_NMTOKEN = CONSTANT_XML_SIMPLE_STRING (L"NMTOKEN");
const XML_SIMPLE_STRING xss_NMTOKENS = CONSTANT_XML_SIMPLE_STRING (L"NMTOKENS");
const XML_SIMPLE_STRING xss_REQUIRED = CONSTANT_XML_SIMPLE_STRING (L"REQUIRED");
const XML_SIMPLE_STRING xss_IMPLIED = CONSTANT_XML_SIMPLE_STRING (L"IMPLIED");
const XML_SIMPLE_STRING xss_FIXED = CONSTANT_XML_SIMPLE_STRING (L"FIXED");
EFI_STATUS
EFIAPI
RtlXmlDefaultCompareStrings (
PXML_TOKENIZATION_STATE pState,
PCXML_EXTENT pLeft,
PCXML_EXTENT pRight,
XML_STRING_COMPARE *pfEqual
)
{
EFI_STATUS status = EFI_SUCCESS;
BOOLEAN fCanDoBinaryCompare = FALSE;
switch (pState->RawTokenState.EncodingFamily) {
case XMLEF_UTF_8_OR_ASCII:
case XMLEF_UCS_4_LE:
case XMLEF_UCS_4_BE:
case XMLEF_UTF_16_LE:
case XMLEF_UTF_16_BE:
fCanDoBinaryCompare = 1;
break;
default:
status = EFI_INVALID_PARAMETER;
goto Exit;
}
if (fCanDoBinaryCompare) {
*pfEqual = (pLeft->cbData == pRight->cbData) ?
XML_STRING_COMPARE_EQUALS : ((pLeft->cbData < pRight->cbData) ? XML_STRING_COMPARE_LT : XML_STRING_COMPARE_GT);
if (*pfEqual == XML_STRING_COMPARE_EQUALS) {
INTN Comparison = CompareMem (pLeft->pvData, pRight->pvData, (UINTN)pLeft->cbData);
if (Comparison == 0) {
*pfEqual = XML_STRING_COMPARE_EQUALS;
} else if (Comparison < 0) {
*pfEqual = XML_STRING_COMPARE_LT;
} else {
*pfEqual = XML_STRING_COMPARE_GT;
}
}
goto Exit;
} else {
NTXMLRAWNEXTCHARACTER pfnDecoder;
VOID *LeftCursor;
VOID *LeftEnd;
VOID *RightCursor;
VOID *RightEnd;
if (!ARGUMENT_PRESENT (pLeft) || !ARGUMENT_PRESENT (pRight) || !ARGUMENT_PRESENT (pfEqual)) {
return RtlpReportXmlError (EFI_INVALID_PARAMETER);
}
*pfEqual = XML_STRING_COMPARE_EQUALS;
pfnDecoder = pState->RawTokenState.pfnNextChar;
LeftCursor = pLeft->pvData;
LeftEnd = (VOID *)(((UINTN)pLeft->pvData) + (UINTN)pLeft->cbData);
RightCursor = pRight->pvData;
RightEnd = (VOID *)(((UINTN)pRight->pvData) + (UINTN)pRight->cbData);
//
// Loop through the data until we run out
//
while ((LeftCursor < LeftEnd) && (RightCursor < RightEnd)) {
XML_RAWTOKENIZATION_RESULT DecodeResult;
UINT32 LeftCharacter, RightCharacter;
//
// Gather the two next characters
//
DecodeResult = (*pfnDecoder)(LeftCursor, LeftEnd);
if (DecodeResult.Character == XML_RAWTOKENIZATION_INVALID_CHARACTER) {
status = DecodeResult.Result.ErrorCode;
goto Exit;
} else {
LeftCharacter = DecodeResult.Character;
LeftCursor = DecodeResult.Result.NextCursor;
}
DecodeResult = (*pfnDecoder)(RightCursor, RightEnd);
if (DecodeResult.Character == XML_RAWTOKENIZATION_INVALID_CHARACTER) {
status = DecodeResult.Result.ErrorCode;
goto Exit;
} else {
RightCharacter = DecodeResult.Character;
RightCursor = DecodeResult.Result.NextCursor;
}
//
// Are they equal?
//
if (RightCharacter == LeftCharacter) {
continue;
}
//
// Nope, left is larger
//
else if (LeftCharacter > RightCharacter) {
*pfEqual = XML_STRING_COMPARE_GT;
goto Exit;
}
//
// Right is larger
//
else {
*pfEqual = XML_STRING_COMPARE_LT;
goto Exit;
}
}
//
// There was data left in the right thing
//
if (RightCursor < RightEnd) {
*pfEqual = XML_STRING_COMPARE_LT;
}
//
// There was data left in the left thing
//
else if (LeftCursor < LeftEnd) {
*pfEqual = XML_STRING_COMPARE_GT;
}
//
// Otherwise, it's still equal
//
}
Exit:
return status;
}
EFI_STATUS
EFIAPI
RtlXmlDefaultSpecialStringCompare (
PXML_TOKENIZATION_STATE pState,
PCXML_EXTENT pToken,
PCXML_SIMPLE_STRING pSpecialString,
XML_STRING_COMPARE *pfMatches,
NTXMLTRANSFORMCHARACTER Transformation
)
{
NTXMLRAWNEXTCHARACTER pfnDecoder;
VOID *RawCursor;
VOID *RawEnd;
CHAR16 *StringCursor;
CHAR16 *StringEnd;
if (!ARGUMENT_PRESENT (pState) || !ARGUMENT_PRESENT (pToken) || !ARGUMENT_PRESENT (pSpecialString) ||
!ARGUMENT_PRESENT (pfMatches))
{
return RtlpReportXmlError (EFI_INVALID_PARAMETER);
}
pfnDecoder = pState->RawTokenState.pfnNextChar;
RawCursor = pToken->pvData;
RawEnd = (VOID *)(((UINTN)pToken->pvData) + (UINTN)pToken->cbData);
StringCursor = pSpecialString->Buffer;
StringEnd = (CHAR16 *)(((UINTN)StringCursor) + pSpecialString->Length);
//
// Rewire the input cursor
//
while ((RawCursor < RawEnd) && (StringCursor < StringEnd)) {
XML_RAWTOKENIZATION_RESULT Result;
UINT32 ulStringCharacter;
ulStringCharacter = *StringCursor++;
Result = (*pfnDecoder)(RawCursor, RawEnd);
if (Result.Character == XML_RAWTOKENIZATION_INVALID_CHARACTER) {
return Result.Result.ErrorCode;
}
if (Transformation) {
ulStringCharacter = (*Transformation)(ulStringCharacter);
Result.Character = (*Transformation)(Result.Character);
}
RawCursor = Result.Result.NextCursor;
//
// Out of our range, ick
//
if (ulStringCharacter > 0xFFFF) {
return RtlpReportXmlError (EFI_INVALID_PARAMETER);
}
//
// Not matching characters?
//
if (ulStringCharacter != Result.Character) {
if (ulStringCharacter > Result.Character) {
*pfMatches = XML_STRING_COMPARE_LT;
goto Exit;
} else {
*pfMatches = XML_STRING_COMPARE_GT;
goto Exit;
}
}
}
if (RawCursor < RawEnd) {
*pfMatches = XML_STRING_COMPARE_LT;
} else if (StringCursor < StringEnd) {
*pfMatches = XML_STRING_COMPARE_GT;
} else {
*pfMatches = XML_STRING_COMPARE_EQUALS;
}
Exit:
return EFI_SUCCESS;
}
#define VALIDATE_XML_STATE(pState) \
(((pState == NULL) || \
((pState->pvCursor == NULL) && (pState->pvXmlData == NULL)) || \
(((UINT32)((UINT8*)pState->pvCursor - (UINT8*)pState->pvXmlData)) >= pState->Run.cbData)) ? EFI_INVALID_PARAMETER : EFI_SUCCESS)
#define CHECK_VALID_CHARACTER(Test) do {\
if (!(Test)) { \
goto IllegalCharacter; \
} } while (0)
XML_RAWTOKENIZATION_RESULT
EFIAPI
RtlXmlDefaultNextCharacter_UTF8 (
PCVOID pvCursor,
IN PCVOID pvEnd
)
{
XML_RAWTOKENIZATION_RESULT Result;
UINT8 b1;
const UINT8 *bCursor;
const UINT64 InputUINT8sLeft = ((UINT64)(UINTN)pvEnd) - ((UINT64)(UINTN)pvCursor);
if (pvCursor >= pvEnd) {
Result.Character = XML_RAWTOKENIZATION_INVALID_CHARACTER;
Result.Result.ErrorCode = STATUS_END_OF_FILE;
return Result;
}
bCursor = pvCursor;
b1 = *bCursor++;
if ((b1 & 0x80) == 0x00) {
Result.Character = b1;
CHECK_VALID_CHARACTER (Result.Character != 0);
} else if ((b1 & 0xe0) == 0xc0) {
CHECK_VALID_CHARACTER (InputUINT8sLeft >= 2);
{
const UINT8 b2 = bCursor[0];
bCursor += 1;
CHECK_VALID_CHARACTER ((b2 & 0xc0) == 0x80);
Result.Character = ((b1 & 0x1f) << 6) | (b2 & 0x3f);
CHECK_VALID_CHARACTER (Result.Character >= 0x00000080);
}
} else if ((b1 & 0xf0) == 0xe0) {
CHECK_VALID_CHARACTER (InputUINT8sLeft >= 3);
{
const UINT8 b2 = bCursor[0];
const UINT8 b3 = bCursor[1];
bCursor += 2;
CHECK_VALID_CHARACTER ((b2 & 0xc0) == 0x80);
CHECK_VALID_CHARACTER ((b3 & 0xc0) == 0x80);
Result.Character = ((((b1 & 0x0f) << 6) | (b2 & 0x3f)) << 6) | (b3 & 0x3f);
CHECK_VALID_CHARACTER (Result.Character >= 0x00000800);
}
} else if ((b1 & 0xf8) == 0xf0) {
CHECK_VALID_CHARACTER (InputUINT8sLeft >= 4);
{
const UINT8 b2 = bCursor[0];
const UINT8 b3 = bCursor[1];
const UINT8 b4 = bCursor[2];
bCursor += 3;
CHECK_VALID_CHARACTER ((b2 & 0xc0) == 0x80);
CHECK_VALID_CHARACTER ((b3 & 0xc0) == 0x80);
CHECK_VALID_CHARACTER ((b4 & 0xc0) == 0x80);
Result.Character = ((((((b1 & 0x07) << 6) | (b2 & 0x3f)) << 6) | (b3 & 0x3f)) << 6) | (b4 & 0x3f);
CHECK_VALID_CHARACTER (Result.Character >= 0x00010000);
}
} else if ((b1 & 0xfc) == 0xf8) {
CHECK_VALID_CHARACTER (InputUINT8sLeft >= 5);
{
const UINT8 b2 = bCursor[0];
const UINT8 b3 = bCursor[1];
const UINT8 b4 = bCursor[2];
const UINT8 b5 = bCursor[3];
bCursor += 4;
CHECK_VALID_CHARACTER ((b2 & 0xc0) == 0x80);
CHECK_VALID_CHARACTER ((b3 & 0xc0) == 0x80);
CHECK_VALID_CHARACTER ((b4 & 0xc0) == 0x80);
CHECK_VALID_CHARACTER ((b5 & 0xc0) == 0x80);
Result.Character = ((((((((b1 & 0x03) << 6) | (b2 & 0x3f)) << 6) | (b3 & 0x3f)) << 6) | (b4 & 0x3f)) << 6);
CHECK_VALID_CHARACTER (Result.Character >= 0x00010000);
}
} else if ((b1 & 0xfe) == 0xfc) {
CHECK_VALID_CHARACTER (InputUINT8sLeft >= 6);
{
const UINT8 b2 = bCursor[0];
const UINT8 b3 = bCursor[1];
const UINT8 b4 = bCursor[2];
const UINT8 b5 = bCursor[3];
const UINT8 b6 = bCursor[4];
bCursor += 5;
CHECK_VALID_CHARACTER ((b2 & 0xc0) == 0x80);
CHECK_VALID_CHARACTER ((b3 & 0xc0) == 0x80);
CHECK_VALID_CHARACTER ((b4 & 0xc0) == 0x80);
CHECK_VALID_CHARACTER ((b5 & 0xc0) == 0x80);
CHECK_VALID_CHARACTER ((b6 & 0xc0) == 0x80);
Result.Character = ((((((((((b1 & 0x01) << 6) | (b2 & 0x3f)) << 6) | (b3 & 0x3f)) << 6) | (b4 & 0x3f)) << 6)) << 6) | (b6 & 0x3f);
CHECK_VALID_CHARACTER (Result.Character >= 0x04000000);
}
} else {
goto IllegalCharacter;
}
Result.Result.NextCursor = (VOID *)bCursor;
return Result;
IllegalCharacter:
Result.Result.ErrorCode = STATUS_ILLEGAL_CHARACTER;
Result.Character = XML_RAWTOKENIZATION_INVALID_CHARACTER;
return Result;
}
XML_RAWTOKENIZATION_RESULT
EFIAPI
RtlXmlDefaultNextCharacter_UCS4LE (
PCVOID pvCursor,
IN PCVOID pvEnd
)
{
XML_RAWTOKENIZATION_RESULT Result;
const UINT64 cLeft = ((UINT64)(UINTN)pvEnd) - ((UINT64)(UINTN)pvCursor);
if (cLeft < sizeof (UINT32)) {
Result.Character = XML_RAWTOKENIZATION_INVALID_CHARACTER;
Result.Result.ErrorCode = STATUS_END_OF_FILE;
return Result;
} else {
Result.Character = *((UINT32 *)pvCursor);
Result.Result.NextCursor = (VOID *)(((UINTN)pvCursor) + sizeof (UINT32));
return Result;
}
}
XML_RAWTOKENIZATION_RESULT
EFIAPI
RtlXmlDefaultNextCharacter_UCS4BE (
PCVOID pvCursor,
IN PCVOID pvEnd
)
{
XML_RAWTOKENIZATION_RESULT Result;
const UINT8 *pb = (UINT8 *)pvCursor;
const UINT64 cLeft = ((UINT64)(UINTN)pvEnd) - ((UINT64)(UINTN)pvCursor);
if (cLeft < sizeof (UINT32)) {
Result.Character = XML_RAWTOKENIZATION_INVALID_CHARACTER;
Result.Result.ErrorCode = STATUS_END_OF_FILE;
} else {
Result.Character =
(((UINT32)pb[0]) << 24)
| (((UINT32)pb[1]) << 16)
| (((UINT32)pb[2]) << 8)
| pb[3];
Result.Result.NextCursor = (VOID *)(((UINTN)pvCursor) + sizeof (UINT32));
}
return Result;
}
XML_RAWTOKENIZATION_RESULT
EFIAPI
RtlXmlDefaultNextCharacter_UTF16BE (
PCVOID pvCursor,
IN PCVOID pvEnd
)
{
XML_RAWTOKENIZATION_RESULT Result;
const UINT8 *pb = (UINT8 *)pvCursor;
const UINT64 cLeft = ((UINT64)(UINTN)pvEnd) - ((UINT64)(UINTN)pvCursor);
if (cLeft < sizeof (UINT16)) {
Result.Character = XML_RAWTOKENIZATION_INVALID_CHARACTER;
Result.Result.ErrorCode = STATUS_END_OF_FILE;
return Result;
} else {
const UINT16 usFirst = (pb[0] << 8) | pb[1];
if ((usFirst >= 0xd800) && (usFirst < 0xdc00)) {
UINT16 usSecond;
if (cLeft < (sizeof (UINT16) + sizeof (UINT16))) {
goto InvalidCharacter;
}
usSecond = (pb[2] << 8) | pb[3];
Result.Character = (((usFirst - 0xd800) * 1024) + (usSecond - 0xdc00)) + 0x10000;
Result.Result.NextCursor = (VOID *)(((UINTN)pvCursor) + (sizeof (UINT16) * 2));
return Result;
} else {
if ((usFirst >= 0xdc00) && (usFirst <= 0xdfff)) {
goto InvalidCharacter;
}
Result.Character = usFirst;
Result.Result.NextCursor = (VOID *)(((UINTN)pvCursor) + sizeof (UINT16));
return Result;
}
}
InvalidCharacter:
Result.Character = XML_RAWTOKENIZATION_INVALID_CHARACTER;
Result.Result.ErrorCode = STATUS_ILLEGAL_CHARACTER;
return Result;
}
XML_RAWTOKENIZATION_RESULT
EFIAPI
RtlXmlDefaultNextCharacter_UTF16LE (
PCVOID pvCursor,
IN PCVOID pvEnd
)
{
XML_RAWTOKENIZATION_RESULT Result;
UINT16 *pb = (UINT16 *)pvCursor;
const UINT64 cLeft = ((UINT64)(UINTN)pvEnd) - ((UINT64)(UINTN)pvCursor);
if (cLeft < sizeof (UINT16)) {
Result.Character = XML_RAWTOKENIZATION_INVALID_CHARACTER;
Result.Result.ErrorCode = STATUS_END_OF_FILE;
return Result;
} else {
const UINT16 usFirst = pb[0];
if ((usFirst >= 0xd800) && (usFirst < 0xdc00)) {
if (cLeft < (sizeof (UINT16) + sizeof (UINT16))) {
goto InvalidCharacter;
}
Result.Character = (((usFirst - 0xd800) * 1024) + (pb[1] - 0xdc00)) + 0x10000;
Result.Result.NextCursor = (VOID *)(((UINTN)pvCursor) + (sizeof (UINT16) * 2));
return Result;
} else {
//
// Leading surrogates are bad
//
if ((usFirst >= 0xdc00) && (usFirst <= 0xdfff)) {
goto InvalidCharacter;
}
Result.Character = usFirst;
Result.Result.NextCursor = (VOID *)(((UINTN)pvCursor) + sizeof (UINT16));
return Result;
}
}
InvalidCharacter:
Result.Character = XML_RAWTOKENIZATION_INVALID_CHARACTER;
Result.Result.ErrorCode = STATUS_ILLEGAL_CHARACTER;
return Result;
}
//
// For now, we're dumb.
//
#define _RtlIsCharacterText(x) (TRUE)
BOOLEAN
RtlpIsCharacterLetter (
UINT32 ulCharacter
)
{
//
// BUGBUG: For now, we only care about the US english alphabet
//
return (BOOLEAN)(((ulCharacter >= L'a') && (ulCharacter <= L'z')) || ((ulCharacter >= L'A') && (ulCharacter <= L'Z')));
}
BOOLEAN
RtlpIsCharacterDigit (
UINT32 ulCharacter
)
{
return (BOOLEAN)((ulCharacter >= L'0') && (ulCharacter <= L'9')) == TRUE;
}
BOOLEAN
RtlpIsCharacterCombiner (
UINT32 ulCharacter
)
{
return FALSE;
}
BOOLEAN
RtlpIsCharacterExtender (
UINT32 ulCharacter
)
{
return FALSE;
}
NTXML_RAW_TOKEN EFIAPI
_RtlpDecodeCharacter (
UINT32 ulCharacter
)
{
NTXML_RAW_TOKEN RetVal;
switch (ulCharacter) {
case L'-': RetVal = NTXML_RAWTOKEN_DASH;
break;
case L'.': RetVal = NTXML_RAWTOKEN_DOT;
break;
case L'=': RetVal = NTXML_RAWTOKEN_EQUALS;
break;
case L'/': RetVal = NTXML_RAWTOKEN_FORWARDSLASH;
break;
case L'>': RetVal = NTXML_RAWTOKEN_GT;
break;
case L'<': RetVal = NTXML_RAWTOKEN_LT;
break;
case L'?': RetVal = NTXML_RAWTOKEN_QUESTIONMARK;
break;
case L'\"': RetVal = NTXML_RAWTOKEN_DOUBLEQUOTE;
break;
case L'\'': RetVal = NTXML_RAWTOKEN_QUOTE;
break;
case L'[': RetVal = NTXML_RAWTOKEN_OPENBRACKET;
break;
case L']': RetVal = NTXML_RAWTOKEN_CLOSEBRACKET;
break;
case L'!': RetVal = NTXML_RAWTOKEN_BANG;
break;
case L'(': RetVal = NTXML_RAWTOKEN_OPENPAREN;
break;
case L')': RetVal = NTXML_RAWTOKEN_CLOSEPAREN;
break;
case L'{': RetVal = NTXML_RAWTOKEN_OPENCURLY;
break;
case L'}': RetVal = NTXML_RAWTOKEN_CLOSECURLY;
break;
case L':': RetVal = NTXML_RAWTOKEN_COLON;
break;
case L';': RetVal = NTXML_RAWTOKEN_SEMICOLON;
break;
case L'_': RetVal = NTXML_RAWTOKEN_UNDERSCORE;
break;
case L'&': RetVal = NTXML_RAWTOKEN_AMPERSAND;
break;
case L'#': RetVal = NTXML_RAWTOKEN_POUNDSIGN;
break;
case L'%': RetVal = NTXML_RAWTOKEN_PERCENT;
break;
case 0x09:
case 0x0a:
case 0x0d:
case 0x20: RetVal = NTXML_RAWTOKEN_WHITESPACE;
break;
default:
if (_RtlIsCharacterText (ulCharacter)) {
RetVal = NTXML_RAWTOKEN_TEXT;
} else {
RetVal = NTXML_RAWTOKEN_ERROR;
}
}
return RetVal;
}
VOID
RtlpXmlSetEndOfStream (
IN PXML_RAWTOKENIZATION_STATE pState,
OUT PXML_RAW_TOKEN pToken
)
{
pToken->Run.cbData = 0;
pToken->Run.pvData = pState->pvDocumentEnd;
pToken->Run.Encoding = pState->EncodingFamily;
pToken->Run.ulCharacters = 0;
pToken->TokenName = NTXML_RAWTOKEN_END_OF_STREAM;
}
EFI_STATUS
EFIAPI
RtlRawXmlTokenizer_SingleToken (
PXML_RAWTOKENIZATION_STATE pState,
PXML_RAW_TOKEN pToken
)
{
XML_RAWTOKENIZATION_RESULT Token;
//
// Determine if this hits the single-item cache, or we're at the end
// of the document
//
if (pState->pvCursor >= pState->pvDocumentEnd) {
RtlpXmlSetEndOfStream (pState, pToken);
return EFI_SUCCESS;
}
//
// Look at the single next input token
//
Token = (*pState->pfnNextChar)(pState->pvCursor, pState->pvDocumentEnd);
if (Token.Character == XML_RAWTOKENIZATION_INVALID_CHARACTER) {
return Token.Result.ErrorCode;
}
//
// Set up returns
//
pToken->Run.pvData = pState->pvCursor;
pToken->Run.cbData = ((UINT64)(UINTN)Token.Result.NextCursor) - ((UINT64)(UINTN)pState->pvCursor);
pToken->Run.Encoding = pState->EncodingFamily;
pToken->Run.ulCharacters = 1;
pToken->TokenName = _RtlpDecodeCharacter (Token.Character);
//
// Update cache
//
pState->pvLastCursor = pState->pvCursor;
pState->LastTokenCache = *pToken;
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
RtlRawXmlTokenizer_GatherWhitespace (
PXML_RAWTOKENIZATION_STATE pState,
PXML_RAW_TOKEN pWhitespace,
PXML_RAW_TOKEN pTerminator
)
{
UINT64 ulCharCount = 0;
VOID *pvCursor = pState->pvCursor;
VOID *pvEnd = pState->pvDocumentEnd;
if (pvCursor >= pvEnd) {
RtlpXmlSetEndOfStream (pState, pWhitespace);
if (pTerminator != NULL) {
ZeroMem (pTerminator, sizeof (*pTerminator));
}
return EFI_SUCCESS;
}
//
// Record starting point
//
do {
//
// Gather a character
//
const XML_RAWTOKENIZATION_RESULT Result = (*pState->pfnNextChar)(pvCursor, pvEnd);
//
// If this is tab, space, cr or lf, then continue. Otherwise,
// quit.
//
switch (Result.Character) {
case XML_RAWTOKENIZATION_INVALID_CHARACTER:
return Result.Result.ErrorCode;
case 0x9:
case 0xa:
case 0xd:
case 0x20:
ulCharCount++;
break;
default:
if (pTerminator) {
pTerminator->Run.pvData = pvCursor;
pTerminator->Run.cbData = ((UINT64)(UINTN)Result.Result.NextCursor) - ((UINT64)(UINTN)pvCursor);
pTerminator->Run.Encoding = pState->EncodingFamily;
pTerminator->Run.ulCharacters = 1;
pTerminator->TokenName = _RtlpDecodeCharacter (Result.Character);
}
goto Done;
break;
}
//
// Advance cursor
//
pvCursor = Result.Result.NextCursor;
} while (pvCursor < pvEnd);
//
// Hit the end of the document during whitespace?
//
if (pTerminator && (pvCursor == pvEnd)) {
RtlpXmlSetEndOfStream (pState, pTerminator);
}
//
// This label is here b/c if we terminated b/c of not-a-whitespace-thing,
// then don't bother to compare against the end of the document.
//
Done:
//
// Set up the other stuff in the output.
//
pWhitespace->Run.pvData = pState->pvCursor;
pWhitespace->Run.cbData = ((UINT64)(UINTN)pvCursor) - ((UINT64)(UINTN)pState->pvCursor);
pWhitespace->Run.ulCharacters = ulCharCount;
pWhitespace->Run.Encoding = pState->EncodingFamily;
pWhitespace->TokenName = NTXML_RAWTOKEN_WHITESPACE;
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
RtlRawXmlTokenizer_GatherPCData (
PXML_RAWTOKENIZATION_STATE pState,
PXML_RAW_TOKEN pPcData,
PXML_RAW_TOKEN pNextRawToken
)
/*++
Purpose:
Gathers PCDATA (anything that's not a <, &, ]]>, or end of stream) until there's
no more.
--*/
{
VOID *pvCursor;
VOID *pvEnd;
UINT64 ulCharCount = 0;
ZeroMem (pPcData, sizeof (*pPcData));
pPcData->Run.pvData = pState->pvCursor;
pPcData->Run.Encoding = pState->EncodingFamily;
if (pState->pvCursor >= pState->pvDocumentEnd) {
RtlpXmlSetEndOfStream (pState, pPcData);
return EFI_SUCCESS;
}
pvCursor = pState->pvCursor;
pvEnd = pState->pvDocumentEnd;
do {
const XML_RAWTOKENIZATION_RESULT Result = (*pState->pfnNextChar)(pvCursor, pvEnd);
switch (Result.Character) {
case XML_RAWTOKENIZATION_INVALID_CHARACTER:
return Result.Result.ErrorCode;
//
// < terminates PCData, as it's probably the start of
// a new element.
//
case L'<':
if (pNextRawToken != NULL) {
pNextRawToken->Run.cbData = ((UINT64)(UINTN)Result.Result.NextCursor) - ((UINT64)(UINTN)pvCursor);
pNextRawToken->Run.pvData = pvCursor;
pNextRawToken->Run.Encoding = pState->EncodingFamily;
pNextRawToken->Run.ulCharacters = 1;
pNextRawToken->TokenName = NTXML_RAWTOKEN_LT;
}
goto NoMore;
//
// Everything else is just normal pcdata to use
//
default:
ulCharCount++;
break;
}
//
// Move the cursor along
//
pvCursor = Result.Result.NextCursor;
} while (pvCursor < pvEnd);
NoMore:
if (pNextRawToken && (pvCursor >= pvEnd)) {
RtlpXmlSetEndOfStream (pState, pNextRawToken);
}
pPcData->Run.cbData = (UINT64)(UINTN)pvCursor - (UINT64)(UINTN)pState->pvCursor;
pPcData->Run.ulCharacters = ulCharCount;
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
RtlRawXmlTokenizer_GatherNTokens (
PXML_RAWTOKENIZATION_STATE pState,
PXML_RAW_TOKEN pTokens,
UINT64 ulTokenCount
)
{
VOID *pvCursor = pState->pvCursor;
const VOID *pvDocumentEnd = pState->pvDocumentEnd;
//
// If we're at the document end, set all the tokens to the "end" state
// and return immediately.
//
if ((ulTokenCount == 0) || (pvCursor >= pvDocumentEnd)) {
goto FillEndOfDocumentTokens;
}
//
// While we've got tokens left, and we're not at the end of the
// document, start grabbing chunklets
//
do {
const XML_RAWTOKENIZATION_RESULT Result = (*pState->pfnNextChar)(pvCursor, pvDocumentEnd);
//
// If this was a zero character, then there might have been an error -
// see if the status was set, and if so, return
//
if (Result.Character == XML_RAWTOKENIZATION_INVALID_CHARACTER) {
return Result.Result.ErrorCode;
}
//
// Decode the name
//
pTokens->TokenName = _RtlpDecodeCharacter (Result.Character);
pTokens->Run.cbData = ((UINT64)(UINTN)Result.Result.NextCursor) - ((UINT64)(UINTN)pvCursor);
pTokens->Run.pvData = pvCursor;
pTokens->Run.ulCharacters = 1;
pTokens->Run.Encoding = pState->EncodingFamily;
pvCursor = Result.Result.NextCursor;
pTokens++;
} while (ulTokenCount-- && (pvCursor < pvDocumentEnd));
if (ulTokenCount == -1) {
ulTokenCount = 0;
}
//
// Did we find the end of the document before we ran out of tokens from the
// input? Then fill the remainder with the "end of document" token
//
FillEndOfDocumentTokens:
if (ulTokenCount) {
while (ulTokenCount--) {
RtlpXmlSetEndOfStream (pState, pTokens++);
}
}
return EFI_SUCCESS;
}
EFI_STATUS
EFIAPI
RtlRawXmlTokenizer_GatherIdentifier (
PXML_RAWTOKENIZATION_STATE pState,
PXML_RAW_TOKEN pIdentifier,
PXML_RAW_TOKEN pStoppedOn
)
{
XML_RAWTOKENIZATION_RESULT Result;
VOID *pvCursor = pState->pvCursor;
const VOID *pvDocumentEnd = pState->pvDocumentEnd;
UINT64 ulCharCount = 0;
pIdentifier->Run.cbData = 0;
pIdentifier->Run.ulCharacters = 0;
pIdentifier->Run.Encoding = pState->EncodingFamily;
if (pvCursor >= pvDocumentEnd) {
RtlpXmlSetEndOfStream (pState, pIdentifier);
return EFI_SUCCESS;
}
//
// Start up
//
pIdentifier->Run.pvData = pvCursor;
pIdentifier->TokenName = NTXML_RAWTOKEN_ERROR;
//
// Start with the first character at the cursor
Result = (*pState->pfnNextChar)(pvCursor, pvDocumentEnd);
//
// Badly formatted name - stop before we get too far.
//
if (Result.Character == XML_RAWTOKENIZATION_INVALID_CHARACTER) {
return Result.Result.ErrorCode;
}
//
// Not a _ or a character is a bad identifier
//
else if ((Result.Character != L'_') && !RtlpIsCharacterLetter (Result.Character)) {
if (pStoppedOn) {
pStoppedOn->Run.cbData = ((UINT64)(UINTN)Result.Result.NextCursor) - ((UINT64)(UINTN)pvCursor);
pStoppedOn->Run.pvData = pvCursor;
pStoppedOn->Run.ulCharacters = 1;
pStoppedOn->Run.Encoding = pState->EncodingFamily;
pStoppedOn->TokenName = _RtlpDecodeCharacter (Result.Character);
}
return EFI_SUCCESS;
}
ulCharCount = 1;
//
// Advance cursor, now just look for name characters
//
pvCursor = Result.Result.NextCursor;
//
// Was that the last character in the input?