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windows-nt/Source/XPSP1/NT/base/ntsetup/textmode/winnt/dninf.c

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2020-09-26 03:20:57 -05:00
/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
alinf.c
Abstract:
This module implements functions to access the parsed INF.
Author:
Sunil Pai (sunilp) 13-Nov-1991
Revision History:
Calin Negreanu (calinn) 03-Sep-1998 - Major parser rewrite to work with a swap file
--*/
#include "winnt.h"
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <dos.h>
#include <stdio.h>
#include <io.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#define MAX_BUFFER_SIZE 0x1680 //7D00
#define SWAP_SIGNATURE 0xAABBCCDD
#define SWAP_SIGN_SIZE 4
#define NULL_HANDLE 0
#define MAX_PATH 256
//
// typedefs exported
//
typedef unsigned *PUNSIGNED;
typedef PVOID SECTION_HANDLE;
typedef unsigned long LINE_HANDLE;
typedef unsigned long VALUE_HANDLE;
typedef struct _SWAP_VALUE {
unsigned ValueSize;
VALUE_HANDLE NextValue;
char ValueName[];
} SWAP_VALUE, *PSWAP_VALUE;
typedef struct _SWAP_LINE {
unsigned LineSize;
LINE_HANDLE NextLine;
VALUE_HANDLE FirstValue;
VALUE_HANDLE LastValue;
char LineName[];
} SWAP_LINE, *PSWAP_LINE;
typedef struct _SWAP_SECTION {
unsigned SectionSize;
SECTION_HANDLE NextSection;
LINE_HANDLE FirstLine;
LINE_HANDLE LastLine;
char SectionName[];
} SWAP_SECTION, *PSWAP_SECTION;
typedef struct _SWAP_INF {
SECTION_HANDLE CurrentSection;
SECTION_HANDLE FirstSection;
SECTION_HANDLE LastSection;
int SwapFileHandle;
unsigned long BufferSize;
BOOLEAN BufferDirty;
PCHAR Buffer;
unsigned long BufferStart;
unsigned long BufferEnd;
SECTION_HANDLE LastSectionHandle;
unsigned LastLineIndex;
LINE_HANDLE LastLineHandle;
unsigned LastValueIndex;
VALUE_HANDLE LastValueHandle;
char SwapFile[];
} SWAP_INF, *PSWAP_INF;
char *CommonStrings[] =
{ (char *)("d1")
};
//
// DEFINES USED FOR THE PARSER INTERNALLY
//
//
// typedefs used
//
typedef enum _tokentype {
TOK_EOF,
TOK_EOL,
TOK_LBRACE,
TOK_RBRACE,
TOK_STRING,
TOK_EQUAL,
TOK_COMMA,
TOK_ERRPARSE,
TOK_ERRNOMEM
} TOKENTYPE, *PTOKENTTYPE;
typedef struct _token {
TOKENTYPE Type;
PCHAR pValue;
} TOKEN, *PTOKEN;
//
// Routine defines
//
PSWAP_SECTION
GetSectionPtr (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE SectionHandle
);
PSWAP_LINE
GetLinePtr (
IN PSWAP_INF InfHandle,
IN LINE_HANDLE LineHandle
);
PSWAP_VALUE
GetValuePtr (
IN PSWAP_INF InfHandle,
IN VALUE_HANDLE ValueHandle
);
SECTION_HANDLE
GetNextSection (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE SectionHandle
);
LINE_HANDLE
GetNextLine (
IN PSWAP_INF InfHandle,
IN LINE_HANDLE LineHandle
);
VALUE_HANDLE
GetNextValue (
IN PSWAP_INF InfHandle,
IN VALUE_HANDLE ValueHandle
);
SECTION_HANDLE
AddSection (
IN PSWAP_INF InfHandle,
IN PCHAR SectionName
);
LINE_HANDLE
AddLine (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE Section,
IN PCHAR LineName
);
VALUE_HANDLE
AddValue (
IN PSWAP_INF InfHandle,
IN LINE_HANDLE Line,
IN PCHAR ValueName
);
SECTION_HANDLE
StoreNewSection (
IN PSWAP_INF InfHandle,
IN PSWAP_SECTION Section
);
LINE_HANDLE
StoreNewLine (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE Section,
IN PSWAP_LINE Line
);
VALUE_HANDLE
StoreNewValue (
IN PSWAP_INF InfHandle,
IN LINE_HANDLE Line,
IN PSWAP_VALUE Value
);
BOOLEAN
LoadBuffer (
IN PSWAP_INF InfHandle,
IN unsigned long Offset
);
TOKEN
GetToken (
IN FILE *File
);
BOOLEAN
ParseInfBuffer (
IN PSWAP_INF InfHandle,
IN FILE *File,
IN OUT unsigned *LineNumber
);
//
// Internal Routine declarations for searching in the INF structures
//
VALUE_HANDLE
SearchValueInLineByIndex (
IN PSWAP_INF InfHandle,
IN LINE_HANDLE Line,
IN unsigned ValueIndex
);
LINE_HANDLE
SearchLineInSectionByName (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE Section,
IN PCHAR LineName
);
LINE_HANDLE
SearchLineInSectionByIndex (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE Section,
IN unsigned LineIndex
);
SECTION_HANDLE
SearchSectionByName (
IN PSWAP_INF InfHandle,
IN PCHAR SectionName
);
//
// ROUTINE DEFINITIONS
//
static unsigned g_Sequencer = 0;
//
// returns a handle to use for further inf parsing
//
int
DnInitINFBuffer (
IN FILE *InfFileHandle,
OUT PVOID *pINFHandle,
OUT unsigned *LineNumber
)
/*++
Routine Description:
Arguments:
Return Value:
--*/
{
char SwapFilePath[MAX_PATH];
PSWAP_INF InfHandle = NULL;
int Status;
unsigned long SwapSign;
*LineNumber = 0;
//
// Prepare the swap file path
//
sprintf (SwapFilePath, "%c:\\INF%03u.SWP", DngSwapDriveLetter, g_Sequencer++);
//
// Allocate and populate the SWAP_INF structure
//
InfHandle = MALLOC(sizeof(SWAP_INF) + strlen (SwapFilePath) + 1, TRUE);
InfHandle->CurrentSection = NULL;
InfHandle->FirstSection = NULL;
InfHandle->LastSection = NULL;
InfHandle->SwapFileHandle = -1;
InfHandle->BufferSize = 0;
InfHandle->BufferDirty = FALSE;
InfHandle->Buffer = NULL;
InfHandle->BufferStart = 0;
InfHandle->BufferEnd = 0;
InfHandle->LastSectionHandle = NULL_HANDLE;
InfHandle->LastLineIndex = 0xffff;
InfHandle->LastLineHandle = NULL_HANDLE;
InfHandle->LastValueIndex = 0xffff;
InfHandle->LastValueHandle = NULL_HANDLE;
strcpy (InfHandle->SwapFile, SwapFilePath);
//
// Prepare the swap file
//
InfHandle->SwapFileHandle = open (InfHandle->SwapFile, O_BINARY|O_CREAT|O_TRUNC|O_RDWR, S_IREAD|S_IWRITE);
if (InfHandle->SwapFileHandle == -1) {
FREE (InfHandle);
Status = errno;
}
else {
//
// write down signature
//
SwapSign = SWAP_SIGNATURE;
write (InfHandle->SwapFileHandle, &SwapSign, SWAP_SIGN_SIZE);
//
// Prepare the buffer
//
InfHandle->BufferSize = MAX_BUFFER_SIZE;
InfHandle->Buffer = MALLOC (MAX_BUFFER_SIZE, TRUE);
InfHandle->BufferStart = SWAP_SIGN_SIZE;
InfHandle->BufferEnd = SWAP_SIGN_SIZE;
//
// Parse the file
//
if (!ParseInfBuffer (InfHandle, InfFileHandle, LineNumber)) {
//
// Free SWAP_INF structure
//
DnFreeINFBuffer (InfHandle);
*pINFHandle = NULL;
Status = EBADF;
} else {
*pINFHandle = InfHandle;
Status = EZERO;
}
}
//
// Clean up and return
//
return(Status);
}
//
// frees an INF Buffer
//
int
DnFreeINFBuffer (
IN PVOID INFHandle
)
/*++
Routine Description:
Arguments:
Return Value:
--*/
{
PSWAP_INF pINF;
PSWAP_SECTION Section;
SECTION_HANDLE SectionHandle;
//
// Valid INF Handle?
//
if (INFHandle == (PVOID)NULL) {
return EZERO;
}
//
// cast the buffer into an INF structure
//
pINF = (PSWAP_INF)INFHandle;
//
// Close and delete the swap file
//
close (pINF->SwapFileHandle);
remove (pINF->SwapFile);
//
// free temporary buffer
//
FREE (pINF->Buffer);
//
// Free section list
//
SectionHandle = pINF->FirstSection;
while (SectionHandle) {
Section = GetSectionPtr (pINF, SectionHandle);
SectionHandle = Section->NextSection;
FREE (Section);
}
//
// free the inf structure too
//
FREE(pINF);
return( EZERO );
}
SECTION_HANDLE
AddSection (
IN PSWAP_INF InfHandle,
IN PCHAR SectionName
)
{
SECTION_HANDLE SectionHandle;
PSWAP_SECTION Section;
unsigned SectionSize;
//
// Let's walk through the section structures to make sure that this section does
// not exist.
//
SectionHandle = InfHandle->FirstSection;
while (SectionHandle) {
Section = GetSectionPtr (InfHandle, SectionHandle);
if (stricmp (Section->SectionName, SectionName) == 0) {
break;
}
SectionHandle = GetNextSection (InfHandle, SectionHandle);
}
if (!SectionHandle) {
//
// Allocate the section structure
//
SectionSize = sizeof(SWAP_SECTION) + (SectionName?strlen (SectionName):0) + 1;
Section = MALLOC (SectionSize, TRUE);
Section->SectionSize = SectionSize;
Section->NextSection = NULL;
Section->FirstLine = NULL_HANDLE;
Section->LastLine = NULL_HANDLE;
if (SectionName) {
strcpy (Section->SectionName, SectionName);
}
else {
Section->SectionName[0] = 0;
}
//
// Store the newly created section
//
SectionHandle = StoreNewSection (InfHandle, Section);
}
return SectionHandle;
}
LINE_HANDLE
AddLine (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE Section,
IN PCHAR LineName
)
{
LINE_HANDLE LineHandle;
PSWAP_LINE Line;
unsigned LineSize;
//
// Allocate the line structure
//
LineSize = sizeof(SWAP_LINE) + (LineName?strlen (LineName):0) + 1;
Line = MALLOC (LineSize, TRUE);
Line->LineSize = LineSize;
Line->NextLine = NULL_HANDLE;
Line->FirstValue = NULL_HANDLE;
Line->LastValue = NULL_HANDLE;
if (LineName) {
strcpy (Line->LineName, LineName);
}
else {
Line->LineName[0] = 0;
}
//
// Store the newly created line
//
LineHandle = StoreNewLine (InfHandle, Section, Line);
FREE (Line);
return LineHandle;
}
VALUE_HANDLE
AddValue (
IN PSWAP_INF InfHandle,
IN LINE_HANDLE Line,
IN PCHAR ValueName
)
{
VALUE_HANDLE ValueHandle;
PSWAP_VALUE Value;
unsigned ValueSize;
//
// Allocate the value structure
//
ValueSize = sizeof(SWAP_VALUE) + (ValueName?strlen (ValueName):0) + 1;
Value = MALLOC (ValueSize, TRUE);
Value->ValueSize = ValueSize;
Value->NextValue = NULL_HANDLE;
if (ValueName) {
strcpy (Value->ValueName, ValueName);
}
else {
Value->ValueName[0] = 0;
}
//
// Store the newly created line
//
ValueHandle = StoreNewValue (InfHandle, Line, Value);
FREE (Value);
return ValueHandle;
}
PSWAP_SECTION
GetSectionPtr (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE SectionHandle
)
{
return (PSWAP_SECTION) SectionHandle;
}
PSWAP_LINE
GetLinePtr (
IN PSWAP_INF InfHandle,
IN LINE_HANDLE LineHandle
)
{
//
// Verify if the buffer contains the requested line (at least the size of LineSize)
//
if ((InfHandle->BufferStart > LineHandle) ||
(InfHandle->BufferEnd < (LineHandle + sizeof (unsigned))) ||
(InfHandle->BufferEnd < (LineHandle + *((PUNSIGNED)(InfHandle->Buffer+LineHandle-InfHandle->BufferStart))))
) {
LoadBuffer (InfHandle, LineHandle);
}
return (PSWAP_LINE) (InfHandle->Buffer+LineHandle-InfHandle->BufferStart);
}
PSWAP_VALUE
GetValuePtr (
IN PSWAP_INF InfHandle,
IN VALUE_HANDLE ValueHandle
)
{
//
// Verify if the buffer contains the requested value (at least the size of ValueSize)
//
if ((InfHandle->BufferStart > ValueHandle) ||
(InfHandle->BufferEnd < (ValueHandle + sizeof (unsigned))) ||
(InfHandle->BufferEnd < (ValueHandle + *((PUNSIGNED)(InfHandle->Buffer+ValueHandle-InfHandle->BufferStart))))
) {
LoadBuffer (InfHandle, ValueHandle);
}
return (PSWAP_VALUE) (InfHandle->Buffer+ValueHandle-InfHandle->BufferStart);
}
SECTION_HANDLE
GetNextSection (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE SectionHandle
)
{
PSWAP_SECTION Section;
Section = GetSectionPtr (InfHandle, SectionHandle);
return Section->NextSection;
}
LINE_HANDLE
GetNextLine (
IN PSWAP_INF InfHandle,
IN LINE_HANDLE LineHandle
)
{
PSWAP_LINE Line;
Line = GetLinePtr (InfHandle, LineHandle);
return Line->NextLine;
}
VALUE_HANDLE
GetNextValue (
IN PSWAP_INF InfHandle,
IN VALUE_HANDLE ValueHandle
)
{
PSWAP_VALUE Value;
Value = GetValuePtr (InfHandle, ValueHandle);
return Value->NextValue;
}
SECTION_HANDLE
StoreNewSection (
IN PSWAP_INF InfHandle,
IN PSWAP_SECTION Section
)
{
PSWAP_SECTION LastSectionPtr;
if (!InfHandle->FirstSection) {
InfHandle->FirstSection = (SECTION_HANDLE) Section;
InfHandle->LastSection = (SECTION_HANDLE) Section;
}
else {
LastSectionPtr = GetSectionPtr (InfHandle, InfHandle->LastSection);
LastSectionPtr->NextSection = (SECTION_HANDLE) Section;
InfHandle->LastSection = (SECTION_HANDLE) Section;
}
return (SECTION_HANDLE) Section;
}
LINE_HANDLE
StoreNewLine (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE Section,
IN PSWAP_LINE Line
)
{
PSWAP_SECTION SectionPtr;
LINE_HANDLE LineHandle;
PSWAP_LINE LastLinePtr;
//
// Let's store data in the swap file
//
if ((InfHandle->BufferSize-InfHandle->BufferEnd+InfHandle->BufferStart) < Line->LineSize) {
LoadBuffer (InfHandle, 0);
}
memcpy (InfHandle->Buffer+InfHandle->BufferEnd-InfHandle->BufferStart, Line, Line->LineSize);
InfHandle->BufferDirty = TRUE;
LineHandle = InfHandle->BufferEnd;
InfHandle->BufferEnd += Line->LineSize;
SectionPtr = GetSectionPtr (InfHandle, Section);
if (!SectionPtr->LastLine) {
SectionPtr->FirstLine = LineHandle;
SectionPtr->LastLine = LineHandle;
}
else {
LastLinePtr = GetLinePtr (InfHandle, SectionPtr->LastLine);
LastLinePtr->NextLine = LineHandle;
InfHandle->BufferDirty = TRUE;
SectionPtr = GetSectionPtr (InfHandle, Section);
SectionPtr->LastLine = LineHandle;
}
return LineHandle;
}
VALUE_HANDLE
StoreNewValue (
IN PSWAP_INF InfHandle,
IN LINE_HANDLE Line,
IN PSWAP_VALUE Value
)
{
PSWAP_LINE LinePtr;
VALUE_HANDLE ValueHandle;
PSWAP_VALUE LastValuePtr;
//
// Let's store data in the swap file
//
if ((InfHandle->BufferSize-InfHandle->BufferEnd+InfHandle->BufferStart) < Value->ValueSize) {
LoadBuffer (InfHandle, 0);
}
memcpy (InfHandle->Buffer+InfHandle->BufferEnd-InfHandle->BufferStart, Value, Value->ValueSize);
InfHandle->BufferDirty = TRUE;
ValueHandle = InfHandle->BufferEnd;
InfHandle->BufferEnd += Value->ValueSize;
LinePtr = GetLinePtr (InfHandle, Line);
if (!LinePtr->LastValue) {
LinePtr->FirstValue = ValueHandle;
LinePtr->LastValue = ValueHandle;
InfHandle->BufferDirty = TRUE;
}
else {
LastValuePtr = GetValuePtr (InfHandle, LinePtr->LastValue);
LastValuePtr->NextValue = ValueHandle;
InfHandle->BufferDirty = TRUE;
LinePtr = GetLinePtr (InfHandle, Line);
LinePtr->LastValue = ValueHandle;
InfHandle->BufferDirty = TRUE;
}
return ValueHandle;
}
BOOLEAN
LoadBuffer (
IN PSWAP_INF InfHandle,
IN unsigned long Offset
)
{
//
// See if we need to write the buffer to disk (e.g. is dirty)
//
if (InfHandle->BufferDirty) {
lseek (InfHandle->SwapFileHandle, InfHandle->BufferStart, SEEK_SET);
write (InfHandle->SwapFileHandle, InfHandle->Buffer, (unsigned int) (InfHandle->BufferEnd-InfHandle->BufferStart));
}
if (!Offset) {
Offset = lseek (InfHandle->SwapFileHandle, 0, SEEK_END);
}
InfHandle->BufferStart = lseek (InfHandle->SwapFileHandle, Offset, SEEK_SET);
InfHandle->BufferEnd = InfHandle->BufferStart + read (InfHandle->SwapFileHandle, InfHandle->Buffer, MAX_BUFFER_SIZE);
return TRUE;
}
SECTION_HANDLE
SearchSectionByName (
IN PSWAP_INF InfHandle,
IN PCHAR SectionName
)
{
SECTION_HANDLE SectionHandle;
PSWAP_SECTION Section;
SectionHandle = InfHandle->FirstSection;
while (SectionHandle) {
Section = GetSectionPtr (InfHandle, SectionHandle);
if (stricmp (Section->SectionName, SectionName?SectionName:"") == 0) {
break;
}
SectionHandle = GetNextSection (InfHandle, SectionHandle);
}
if (SectionHandle != InfHandle->LastSectionHandle) {
InfHandle->LastSectionHandle = SectionHandle;
InfHandle->LastLineIndex = 0xffff;
InfHandle->LastLineHandle = NULL_HANDLE;
InfHandle->LastValueIndex = 0xffff;
InfHandle->LastValueHandle = NULL_HANDLE;
}
return SectionHandle;
}
LINE_HANDLE
SearchLineInSectionByName (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE Section,
IN PCHAR LineName
)
{
PSWAP_SECTION SectionPtr;
LINE_HANDLE LineHandle;
PSWAP_LINE Line;
unsigned index;
if (!Section) {
return NULL_HANDLE;
}
SectionPtr = GetSectionPtr (InfHandle, Section);
LineHandle = SectionPtr->FirstLine;
index = 0;
while (LineHandle) {
Line = GetLinePtr (InfHandle, LineHandle);
if (stricmp (Line->LineName, LineName?LineName:"") == 0) {
break;
}
index ++;
LineHandle = GetNextLine (InfHandle, LineHandle);
}
if (LineHandle != InfHandle->LastLineHandle) {
InfHandle->LastLineIndex = index;
InfHandle->LastLineHandle = LineHandle;
InfHandle->LastValueIndex = 0xffff;
InfHandle->LastValueHandle = NULL_HANDLE;
}
return LineHandle;
}
LINE_HANDLE
SearchLineInSectionByIndex (
IN PSWAP_INF InfHandle,
IN SECTION_HANDLE Section,
IN unsigned LineIndex
)
{
PSWAP_SECTION SectionPtr;
LINE_HANDLE LineHandle;
unsigned index;
if (!Section) {
return NULL_HANDLE;
}
//
// Optimize access
//
if ((InfHandle->LastSectionHandle == Section) &&
(InfHandle->LastLineIndex <= LineIndex)
) {
LineHandle = InfHandle->LastLineHandle;
index = InfHandle->LastLineIndex;
}
else {
SectionPtr = GetSectionPtr (InfHandle, Section);
LineHandle = SectionPtr->FirstLine;
index = 0;
}
while (LineHandle) {
if (index == LineIndex) {
break;
}
index ++;
LineHandle = GetNextLine (InfHandle, LineHandle);
}
if (LineHandle != InfHandle->LastLineHandle) {
InfHandle->LastLineIndex = LineIndex;
InfHandle->LastLineHandle = LineHandle;
InfHandle->LastValueIndex = 0xffff;
InfHandle->LastValueHandle = NULL_HANDLE;
}
return LineHandle;
}
VALUE_HANDLE
SearchValueInLineByIndex (
IN PSWAP_INF InfHandle,
IN LINE_HANDLE Line,
IN unsigned ValueIndex
)
{
PSWAP_LINE LinePtr;
VALUE_HANDLE ValueHandle;
unsigned index;
if (!Line) {
return NULL_HANDLE;
}
//
// Optimize access
//
if ((InfHandle->LastLineHandle == Line) &&
(InfHandle->LastValueIndex <= ValueIndex)
) {
ValueHandle = InfHandle->LastValueHandle;
index = InfHandle->LastValueIndex;
}
else {
LinePtr = GetLinePtr (InfHandle, Line);
ValueHandle = LinePtr->FirstValue;
index = 0;
}
while (ValueHandle) {
if (index == ValueIndex) {
break;
}
index ++;
ValueHandle = GetNextValue (InfHandle, ValueHandle);
}
InfHandle->LastValueIndex = ValueIndex;
InfHandle->LastValueHandle = ValueHandle;
return ValueHandle;
}
//
// Globals used by the token parser
//
// string terminators are the whitespace characters (isspace: space, tab,
// linefeed, formfeed, vertical tab, carriage return) or the chars given below
CHAR StringTerminators[] = {'[', ']', '=', ',', '\"', ' ', '\t',
'\n','\f','\v','\r','\032', 0};
//
// quoted string terminators allow some of the regular terminators to
// appear as characters
CHAR QStringTerminators[] = {'\"', '\n','\f','\v', '\r','\032', 0};
//
// Main parser routine
//
BOOLEAN
ParseInfBuffer (
IN PSWAP_INF InfHandle,
IN FILE *File,
IN OUT unsigned *LineNumber
)
/*++
Routine Description:
Given a character buffer containing the INF file, this routine parses
the INF into an internal form with Section records, Line records and
Value records.
Arguments:
InfHandle - PSWAP_INF structure used to create INF structures
File - supplies open, rewound CRT handle to file.
LineNumber - In case of error, this variable will contain the line
in the file that contains a syntax error.
Return Value:
TRUE - the INF file was parsed successfully
FALSE - otherwise
--*/
{
PCHAR pchSectionName, pchValue;
unsigned State, InfLine;
TOKEN Token;
BOOLEAN Done;
BOOLEAN Error;
int ErrorCode;
SECTION_HANDLE LastSection = NULL;
LINE_HANDLE LastLine = NULL_HANDLE;
*LineNumber = 0;
//
// Set initial state
//
State = 1;
InfLine = 1;
Done = FALSE;
Error = FALSE;
//
// Enter token processing loop
//
while (!Done) {
Token = GetToken(File);
switch (State) {
//
// STATE1: Start of file, this state remains till first
// section is found
// Valid Tokens: TOK_EOL, TOK_EOF, TOK_LBRACE
case 1:
switch (Token.Type) {
case TOK_EOL:
break;
case TOK_EOF:
Done = TRUE;
break;
case TOK_LBRACE:
State = 2;
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
}
break;
//
// STATE 2: Section LBRACE has been received, expecting STRING
//
// Valid Tokens: TOK_STRING
//
case 2:
switch (Token.Type) {
case TOK_STRING:
State = 3;
pchSectionName = Token.pValue;
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
}
break;
//
// STATE 3: Section Name received, expecting RBRACE
//
// Valid Tokens: TOK_RBRACE
//
case 3:
switch (Token.Type) {
case TOK_RBRACE:
State = 4;
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
}
break;
//
// STATE 4: Section Definition Complete, expecting EOL
//
// Valid Tokens: TOK_EOL, TOK_EOF
//
case 4:
switch (Token.Type) {
case TOK_EOL:
LastSection = AddSection (InfHandle, pchSectionName);
FREE (pchSectionName);
pchSectionName = NULL;
State = 5;
break;
case TOK_EOF:
LastSection = AddSection (InfHandle, pchSectionName);
FREE (pchSectionName);
pchSectionName = NULL;
Done = TRUE;
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
}
break;
//
// STATE 5: Expecting Section Lines
//
// Valid Tokens: TOK_EOL, TOK_EOF, TOK_STRING, TOK_LBRACE
//
case 5:
switch (Token.Type) {
case TOK_EOL:
break;
case TOK_EOF:
Done = TRUE;
break;
case TOK_STRING:
pchValue = Token.pValue;
State = 6;
break;
case TOK_LBRACE:
State = 2;
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
}
break;
//
// STATE 6: String returned, not sure whether it is key or value
//
// Valid Tokens: TOK_EOL, TOK_EOF, TOK_COMMA, TOK_EQUAL
//
case 6:
switch (Token.Type) {
case TOK_EOL:
LastLine = AddLine (InfHandle, LastSection, NULL);
AddValue (InfHandle, LastLine, pchValue);
FREE (pchValue);
pchValue = NULL;
State = 5;
break;
case TOK_EOF:
LastLine = AddLine (InfHandle, LastSection, NULL);
AddValue (InfHandle, LastLine, pchValue);
FREE (pchValue);
pchValue = NULL;
Done = TRUE;
break;
case TOK_COMMA:
LastLine = AddLine (InfHandle, LastSection, NULL);
AddValue (InfHandle, LastLine, pchValue);
FREE (pchValue);
pchValue = NULL;
State = 7;
break;
case TOK_EQUAL:
LastLine = AddLine (InfHandle, LastSection, pchValue);
FREE (pchValue);
pchValue = NULL;
State = 8;
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
}
break;
//
// STATE 7: Comma received, Expecting another string
//
// Valid Tokens: TOK_STRING
//
case 7:
switch (Token.Type) {
case TOK_STRING:
AddValue (InfHandle, LastLine, Token.pValue);
State = 9;
break;
case TOK_COMMA:
AddValue (InfHandle, LastLine, NULL);
State = 7;
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
}
break;
//
// STATE 8: Equal received, Expecting another string
//
// Valid Tokens: TOK_STRING
//
case 8:
switch (Token.Type) {
case TOK_STRING:
AddValue (InfHandle, LastLine, Token.pValue);
State = 9;
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
}
break;
//
// STATE 9: String received after equal, value string
//
// Valid Tokens: TOK_EOL, TOK_EOF, TOK_COMMA
//
case 9:
switch (Token.Type) {
case TOK_EOL:
State = 5;
break;
case TOK_EOF:
Done = TRUE;
break;
case TOK_COMMA:
State = 7;
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
}
break;
//
// STATE 10: Value string definitely received
//
// Valid Tokens: TOK_EOL, TOK_EOF, TOK_COMMA
//
case 10:
switch (Token.Type) {
case TOK_EOL:
State =5;
break;
case TOK_EOF:
Done = TRUE;
break;
case TOK_COMMA:
State = 7;
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
}
break;
default:
Error = Done = TRUE;
ErrorCode = EINVAL;
break;
} // end switch(State)
if (Error) {
switch (ErrorCode) {
case ENOMEM:
DnFatalError(&DnsOutOfMemory);
default:
break;
}
}
else {
//
// Keep track of line numbers so that we can display Errors
//
if (Token.Type == TOK_EOL)
InfLine++;
}
} // End while
if (Error) {
*LineNumber = InfLine;
}
return (BOOLEAN) (!Error);
}
BOOLEAN
TokenMatch (
IN OUT char **p,
IN char *line
)
/*++
Routine Description:
This function tries to match to string pointed to be line against
a set of commonly used stirngs. If we hit, we'll assign p to
point to the matched string.
Arguments:
p - Supplies a char pointer that we'll assign if we find a match.
line - Supplies the address of the string we're trying to match.
Return Value:
TRUE - we found a match and have assigned p
FALSE - we found no match and made no assignment to p
--*/
{
int i;
if( (p == NULL) || (line == NULL) ) {
return( FALSE );
}
for( i = 0; i < sizeof(CommonStrings)/sizeof(char *); i++ ) {
if( !strcmp( line, CommonStrings[i] ) ) {
//
// Hit...
//
*p = (char *)CommonStrings[i];
return( TRUE );
}
}
return( FALSE );
}
TOKEN
GetToken(
IN FILE *File
)
/*++
Routine Description:
This function returns the Next token from the configuration stream.
Arguments:
Stream - Supplies the address of the configuration stream. Returns
the address of where to start looking for tokens within the
stream.
MaxStream - Supplies the address of the last character in the stream.
Return Value:
TOKEN - Returns the next token
--*/
{
int i;
unsigned Length;
TOKEN Token;
#define _MAXLINE 1024
static char line[_MAXLINE+1];
char *p;
//
// Skip whitespace (except for eol)
//
while(((i = fgetc(File)) != EOF) && (i != '\n') && (isspace(i) || (i == 26))) {
;
}
//
// Check for comments and remove them
//
if((i != EOF) && ((i == '#') || (i == ';'))) {
while(((i = fgetc(File)) != EOF) && (i != '\n')) {
;
}
}
//
// Check to see if EOF has been reached, set the token to the right
// value
//
if(i == EOF) {
Token.Type = TOK_EOF;
Token.pValue = NULL;
return(Token);
}
switch(i) {
case '[' :
Token.Type = TOK_LBRACE;
Token.pValue = NULL;
break;
case ']' :
Token.Type = TOK_RBRACE;
Token.pValue = NULL;
break;
case '=' :
Token.Type = TOK_EQUAL;
Token.pValue = NULL;
break;
case ',' :
Token.Type = TOK_COMMA;
Token.pValue = NULL;
break;
case '\n' :
Token.Type = TOK_EOL;
Token.pValue = NULL;
break;
case '\"':
//
// determine quoted string
//
Length = 0;
while(((i = fgetc(File)) != EOF) && !strchr(QStringTerminators,i)) {
if(Length < _MAXLINE) {
line[Length++] = (char)i;
}
}
if((i == EOF) || (i != '\"')) {
Token.Type = TOK_ERRPARSE;
Token.pValue = NULL;
} else {
line[Length] = 0;
p = MALLOC(Length+1,TRUE);
strcpy(p,line);
Token.Type = TOK_STRING;
Token.pValue = p;
}
break;
default:
//
// determine regular string
//
line[0] = (char)i;
Length = 1;
while(((i = fgetc(File)) != EOF) && !strchr(StringTerminators,i)) {
if(Length < _MAXLINE) {
line[Length++] = (char)i;
}
}
//
// Put back the char that terminated the string.
//
if(i != EOF) {
ungetc(i,File);
}
line[Length] = 0;
//
// See if we can use one of the common strings.
//
if( !TokenMatch ( &p, line ) ) {
//
// Nope.
//
p = MALLOC(Length+1,TRUE);
strcpy(p,line);
}
else {
char *p1;
p1 = MALLOC (strlen(p)+1, TRUE);
strcpy (p1, p);
p = p1;
}
Token.Type = TOK_STRING;
Token.pValue = p;
break;
}
return(Token);
}
BOOLEAN
DnSearchINFSection (
IN PVOID INFHandle,
IN PCHAR SectionName
)
{
return (BOOLEAN) (SearchSectionByName ((PSWAP_INF)INFHandle, SectionName) != NULL_HANDLE);
}
PCHAR
DnGetSectionLineIndex (
IN PVOID INFHandle,
IN PCHAR SectionName,
IN unsigned LineIndex,
IN unsigned ValueIndex
)
{
SECTION_HANDLE SectionHandle;
LINE_HANDLE LineHandle;
VALUE_HANDLE ValueHandle;
PSWAP_VALUE Value;
PCHAR result;
SectionHandle = SearchSectionByName ((PSWAP_INF)INFHandle, SectionName);
if (!SectionHandle) {
return NULL;
}
LineHandle = SearchLineInSectionByIndex ((PSWAP_INF)INFHandle, SectionHandle, LineIndex);
if (!LineHandle) {
return NULL;
}
ValueHandle = SearchValueInLineByIndex ((PSWAP_INF)INFHandle, LineHandle, ValueIndex);
if (!ValueHandle) {
return NULL;
}
Value = GetValuePtr ((PSWAP_INF)INFHandle, ValueHandle);
result = MALLOC (Value->ValueSize - sizeof(SWAP_VALUE), TRUE);
strcpy (result, Value->ValueName);
return result;
}
BOOLEAN
DnGetSectionKeyExists (
IN PVOID INFHandle,
IN PCHAR SectionName,
IN PCHAR Key
)
{
SECTION_HANDLE SectionHandle;
SectionHandle = SearchSectionByName ((PSWAP_INF)INFHandle, SectionName);
if (!SectionHandle) {
return FALSE;
}
return (BOOLEAN) (SearchLineInSectionByName ((PSWAP_INF)INFHandle, SectionHandle, Key) != NULL_HANDLE);
}
BOOLEAN
DnGetSectionEntryExists (
IN PVOID INFHandle,
IN PCHAR SectionName,
IN PCHAR Entry
)
{
SECTION_HANDLE SectionHandle;
LINE_HANDLE LineHandle;
PSWAP_SECTION SectionPtr=NULL;
PSWAP_LINE LinePtr=NULL;
PSWAP_VALUE ValuePtr=NULL;
PCHAR pEntryName;
SectionHandle = SearchSectionByName ((PSWAP_INF)INFHandle, SectionName);
if (!SectionHandle) {
return FALSE;
}
//_LOG(("Found [%s]\n", SectionName));
SectionPtr = GetSectionPtr((PSWAP_INF)INFHandle, SectionHandle);
LineHandle = SectionPtr->FirstLine;
while( LineHandle ){
LinePtr = GetLinePtr((PSWAP_INF)INFHandle, LineHandle);
pEntryName = NULL;
if( LinePtr->LineName[0] != 0){
pEntryName = LinePtr->LineName;
// _LOG(("Found Line %s\n", pEntryName));
}else{
ValuePtr = GetValuePtr((PSWAP_INF)INFHandle, LinePtr->FirstValue);
if (ValuePtr && (ValuePtr->ValueName[0] != 0)) {
pEntryName = ValuePtr->ValueName;
}else
pEntryName = NULL;
}
//_LOG(("Found Entry %s\n", pEntryName));
if( pEntryName && !stricmp( pEntryName, Entry )){
return TRUE;
}
LineHandle = GetNextLine((PSWAP_INF)INFHandle, LineHandle);
}// while
return FALSE;
}
PCHAR
DnGetSectionKeyIndex (
IN PVOID INFHandle,
IN PCHAR SectionName,
IN PCHAR Key,
IN unsigned ValueIndex
)
{
SECTION_HANDLE SectionHandle;
LINE_HANDLE LineHandle;
VALUE_HANDLE ValueHandle;
PSWAP_VALUE Value;
PCHAR result;
SectionHandle = SearchSectionByName ((PSWAP_INF)INFHandle, SectionName);
if (!SectionHandle) {
return NULL;
}
LineHandle = SearchLineInSectionByName ((PSWAP_INF)INFHandle, SectionHandle, Key);
if (!LineHandle) {
return NULL;
}
ValueHandle = SearchValueInLineByIndex ((PSWAP_INF)INFHandle, LineHandle, ValueIndex);
if (!ValueHandle) {
return NULL;
}
Value = GetValuePtr ((PSWAP_INF)INFHandle, ValueHandle);
result = MALLOC (Value->ValueSize - sizeof(SWAP_VALUE), TRUE);
strcpy (result, Value->ValueName);
return result;
}
PCHAR
DnGetKeyName (
IN PVOID INFHandle,
IN PCHAR SectionName,
IN unsigned LineIndex
)
{
SECTION_HANDLE SectionHandle;
LINE_HANDLE LineHandle;
PSWAP_LINE Line;
PCHAR result;
SectionHandle = SearchSectionByName ((PSWAP_INF)INFHandle, SectionName);
if (!SectionHandle) {
return NULL;
}
LineHandle = SearchLineInSectionByIndex ((PSWAP_INF)INFHandle, SectionHandle, LineIndex);
if (!LineHandle) {
return NULL;
}
Line = GetLinePtr ((PSWAP_INF)INFHandle, LineHandle);
result = MALLOC (Line->LineSize - sizeof(SWAP_LINE), TRUE);
strcpy (result, Line->LineName);
return result;
}
PVOID
DnNewSetupTextFile (
VOID
)
{
char SwapFilePath[MAX_PATH];
PSWAP_INF InfHandle = NULL;
unsigned long SwapSign;
//
// Prepare the swap file path
//
sprintf (SwapFilePath, "%c:\\INF%03u.SWP", DngSwapDriveLetter, g_Sequencer++);
//
// Allocate and populate the SWAP_INF structure
//
InfHandle = MALLOC(sizeof(SWAP_INF) + strlen (SwapFilePath) + 1, TRUE);
InfHandle->CurrentSection = NULL;
InfHandle->FirstSection = NULL;
InfHandle->LastSection = NULL;
InfHandle->SwapFileHandle = -1;
InfHandle->BufferSize = 0;
InfHandle->BufferDirty = FALSE;
InfHandle->Buffer = NULL;
InfHandle->BufferStart = 0;
InfHandle->BufferEnd = 0;
InfHandle->LastSectionHandle = NULL_HANDLE;
InfHandle->LastLineIndex = 0xffff;
InfHandle->LastLineHandle = NULL_HANDLE;
InfHandle->LastValueIndex = 0xffff;
InfHandle->LastValueHandle = NULL_HANDLE;
strcpy (InfHandle->SwapFile, SwapFilePath);
//
// Prepare the swap file
//
InfHandle->SwapFileHandle = open (InfHandle->SwapFile, O_BINARY|O_CREAT|O_TRUNC|O_RDWR, S_IREAD|S_IWRITE);
if (InfHandle->SwapFileHandle == -1) {
FREE (InfHandle);
return NULL;
}
else {
//
// write down signature
//
SwapSign = SWAP_SIGNATURE;
write (InfHandle->SwapFileHandle, &SwapSign, SWAP_SIGN_SIZE);
//
// Prepare the buffer
//
InfHandle->BufferSize = MAX_BUFFER_SIZE;
InfHandle->Buffer = MALLOC (MAX_BUFFER_SIZE, TRUE);
InfHandle->BufferStart = SWAP_SIGN_SIZE;
InfHandle->BufferEnd = SWAP_SIGN_SIZE;
return InfHandle;
}
}
BOOLEAN
DnWriteSetupTextFile (
IN PVOID INFHandle,
IN PCHAR FileName
)
{
struct find_t FindData;
FILE *Handle;
PSWAP_INF pInf;
SECTION_HANDLE Section;
PSWAP_SECTION SectionPtr;
LINE_HANDLE Line;
PSWAP_LINE LinePtr;
VALUE_HANDLE Value;
PSWAP_VALUE ValuePtr;
//
// See if the file exists and see if it is in read-only mode
//
if(!_dos_findfirst(FileName,_A_HIDDEN|_A_SUBDIR|_A_SYSTEM|_A_RDONLY,&FindData)) {
//
// The File Exists -- Perform some simple checks
//
if (FindData.attrib & _A_RDONLY) {
//
// Make it writeable
//
_dos_setfileattr(FileName,_A_NORMAL);
}
if (FindData.attrib & _A_SUBDIR) {
//
// This isn't a valid file that we can work with..
//
return FALSE;
}
}
//
// Obtain a handle to the file in write-only mode
//
Handle = fopen(FileName, "w+");
if (Handle == NULL) {
//
// We could not open the file
//
return FALSE;
}
pInf = (PSWAP_INF) INFHandle;
if (pInf == NULL) {
//
// There isn't anything in the file.
// That isn't an error since we can empty
// the file if we so desire, but this is a
// strange way todo that. However...
//
fclose(Handle);
return TRUE;
}
//
// NOTE - This can't handle > 64k buffers. Which may or may not be
// important
//
Section = pInf->FirstSection;
while (Section) {
SectionPtr = GetSectionPtr (pInf, Section);
fprintf (Handle, "[%s]\n", SectionPtr->SectionName);
Line = SectionPtr->FirstLine;
while (Line) {
LinePtr = GetLinePtr (pInf, Line);
if ((LinePtr->LineName) && (LinePtr->LineName[0])) {
if (strchr (LinePtr->LineName, ' ') == NULL) {
fprintf (Handle, "%s = ", LinePtr->LineName);
} else {
fprintf (Handle, "\"%s\" = ", LinePtr->LineName);
}
}
Value = LinePtr->FirstValue;
while (Value) {
ValuePtr = GetValuePtr (pInf, Value);
fprintf (Handle,"\"%s\"", ValuePtr->ValueName);
Value = GetNextValue (pInf, Value);
if (Value) {
fprintf (Handle, ",");
}
}
Line = GetNextLine (pInf, Line);
fprintf (Handle,"\n");
}
Section = GetNextSection (pInf, Section);
}
//
// Flush and Close the file
//
fflush(Handle);
fclose(Handle);
return TRUE;
}
VOID
DnAddLineToSection (
IN PVOID INFHandle,
IN PCHAR SectionName,
IN PCHAR KeyName,
IN PCHAR Values[],
IN ULONG ValueCount
)
{
SECTION_HANDLE SectionHandle;
LINE_HANDLE LineHandle;
VALUE_HANDLE ValueHandle;
ULONG v;
SectionHandle = AddSection ((PSWAP_INF)INFHandle, SectionName);
LineHandle = AddLine ((PSWAP_INF)INFHandle, SectionHandle, KeyName);
for (v = 0; v<ValueCount; v++) {
ValueHandle = AddValue ((PSWAP_INF)INFHandle, LineHandle, Values[v]);
}
}
PCHAR
DnGetSectionName (
IN PVOID INFHandle
)
{
PSWAP_INF pInf;
PSWAP_SECTION Section;
PCHAR result;
pInf = (PSWAP_INF)INFHandle;
if (!pInf->CurrentSection) {
pInf->CurrentSection = pInf->FirstSection;
}
else {
pInf->CurrentSection = GetNextSection (pInf, pInf->CurrentSection);
}
if (!pInf->CurrentSection) {
return NULL;
}
Section = GetSectionPtr (pInf, pInf->CurrentSection);
result = MALLOC (Section->SectionSize - sizeof(SWAP_SECTION), TRUE);
strcpy (result, Section->SectionName);
return result;
}
VOID
DnCopySetupTextSection (
IN PVOID FromInf,
IN PVOID ToInf,
IN PCHAR SectionName
)
{
PSWAP_INF SourceInf;
PSWAP_INF DestInf;
SECTION_HANDLE SourceSection;
SECTION_HANDLE DestSection;
PSWAP_SECTION SectionPtr;
LINE_HANDLE SourceLine;
LINE_HANDLE DestLine;
PSWAP_LINE LinePtr;
VALUE_HANDLE SourceValue;
VALUE_HANDLE DestValue;
PSWAP_VALUE ValuePtr;
SourceInf = (PSWAP_INF)FromInf;
DestInf = (PSWAP_INF)ToInf;
SourceSection = SearchSectionByName (FromInf, SectionName);
if (SourceSection) {
SectionPtr = GetSectionPtr (SourceInf, SourceSection);
DestSection = AddSection (DestInf, SectionPtr->SectionName);
if (DestSection) {
SourceLine = SectionPtr->FirstLine;
while (SourceLine) {
LinePtr = GetLinePtr (SourceInf, SourceLine);
DestLine = AddLine (DestInf, DestSection, LinePtr->LineName);
SourceValue = LinePtr->FirstValue;
while (SourceValue) {
ValuePtr = GetValuePtr (SourceInf, SourceValue);
DestValue = AddValue (DestInf, DestLine, ValuePtr->ValueName);
SourceValue = GetNextValue (SourceInf, SourceValue);
}
SourceLine = GetNextLine (SourceInf, SourceLine);
}
}
}
}
Reference in a new issue Copy permalink