You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1782 lines
40 KiB
1782 lines
40 KiB
//
|
|
// Copyright (c) Microsoft Corporation 1995
|
|
//
|
|
// scanner.c
|
|
//
|
|
// This file contains the scanner functions.
|
|
//
|
|
// History:
|
|
// 05-04-95 ScottH Created
|
|
//
|
|
|
|
|
|
#include "proj.h"
|
|
#include "rcids.h"
|
|
|
|
// This is a hack global string used by error messages.
|
|
// This should be removed when Stxerr encapsulates the script
|
|
// filename within itself.
|
|
static char g_szScript[MAX_PATH];
|
|
|
|
#define SCANNER_BUF_SIZE 1024
|
|
|
|
#define IS_WHITESPACE(ch) (' ' == (ch) || '\t' == (ch) || '\n' == (ch) || '\r' == (ch))
|
|
#define IS_QUOTE(ch) ('\"' == (ch))
|
|
#define IS_KEYWORD_LEAD(ch) ('$' == (ch) || '_' == (ch) || IsCharAlpha(ch))
|
|
#define IS_KEYWORD(ch) ('_' == (ch) || IsCharAlphaNumeric(ch))
|
|
#define IS_COMMENT_LEAD(ch) (';' == (ch))
|
|
#define IS_EOL(ch) ('\n' == (ch))
|
|
|
|
typedef BOOL (CALLBACK * SCANEVALPROC)(char ch, LPBOOL pbEatIt, LPARAM);
|
|
|
|
//
|
|
// Lexical mapping
|
|
//
|
|
typedef struct tagLEX
|
|
{
|
|
LPSTR pszLexeme;
|
|
SYM sym;
|
|
} LEX;
|
|
DECLARE_STANDARD_TYPES(LEX);
|
|
|
|
|
|
#pragma data_seg(DATASEG_READONLY)
|
|
|
|
// (The keywords are case-sensitive)
|
|
//
|
|
// This table is sorted alphabetically for binary search.
|
|
//
|
|
const LEX c_rglexKeywords[] = {
|
|
{ "FALSE", SYM_FALSE },
|
|
{ "TRUE", SYM_TRUE },
|
|
{ "and", SYM_AND },
|
|
{ "boolean", SYM_BOOLEAN },
|
|
{ "databits", SYM_DATABITS },
|
|
{ "delay", SYM_DELAY },
|
|
{ "do", SYM_DO },
|
|
{ "endif", SYM_ENDIF },
|
|
{ "endproc", SYM_ENDPROC },
|
|
{ "endwhile", SYM_ENDWHILE },
|
|
{ "even", SYM_EVEN },
|
|
{ "getip", SYM_GETIP },
|
|
{ "goto", SYM_GOTO },
|
|
{ "halt", SYM_HALT },
|
|
{ "if", SYM_IF },
|
|
{ "integer", SYM_INTEGER },
|
|
{ "ipaddr", SYM_IPADDR },
|
|
{ "keyboard", SYM_KEYBRD },
|
|
{ "mark", SYM_MARK },
|
|
{ "matchcase", SYM_MATCHCASE },
|
|
{ "none", SYM_NONE },
|
|
{ "odd", SYM_ODD },
|
|
{ "off", SYM_OFF },
|
|
{ "on", SYM_ON },
|
|
{ "or", SYM_OR },
|
|
{ "parity", SYM_PARITY },
|
|
{ "port", SYM_PORT },
|
|
{ "proc", SYM_PROC },
|
|
{ "raw", SYM_RAW },
|
|
{ "screen", SYM_SCREEN },
|
|
{ "set", SYM_SET },
|
|
{ "space", SYM_SPACE },
|
|
{ "stopbits", SYM_STOPBITS },
|
|
{ "string", SYM_STRING },
|
|
{ "then", SYM_THEN },
|
|
{ "transmit", SYM_TRANSMIT },
|
|
{ "until", SYM_UNTIL },
|
|
{ "waitfor", SYM_WAITFOR },
|
|
{ "while", SYM_WHILE },
|
|
};
|
|
|
|
#pragma data_seg()
|
|
|
|
|
|
//
|
|
// Tokens
|
|
//
|
|
|
|
|
|
#ifdef DEBUG
|
|
|
|
#pragma data_seg(DATASEG_READONLY)
|
|
struct tagSYMMAP
|
|
{
|
|
SYM sym;
|
|
LPCSTR psz;
|
|
} const c_rgsymmap[] = {
|
|
DEBUG_STRING_MAP(SYM_EOF),
|
|
DEBUG_STRING_MAP(SYM_IDENT),
|
|
DEBUG_STRING_MAP(SYM_STRING_LITERAL),
|
|
DEBUG_STRING_MAP(SYM_STRING),
|
|
DEBUG_STRING_MAP(SYM_INTEGER),
|
|
DEBUG_STRING_MAP(SYM_BOOLEAN),
|
|
DEBUG_STRING_MAP(SYM_WAITFOR),
|
|
DEBUG_STRING_MAP(SYM_WHILE),
|
|
DEBUG_STRING_MAP(SYM_TRANSMIT),
|
|
DEBUG_STRING_MAP(SYM_DELAY),
|
|
DEBUG_STRING_MAP(SYM_THEN),
|
|
DEBUG_STRING_MAP(SYM_INT_LITERAL),
|
|
DEBUG_STRING_MAP(SYM_GETIP),
|
|
DEBUG_STRING_MAP(SYM_IPADDR),
|
|
DEBUG_STRING_MAP(SYM_ASSIGN),
|
|
DEBUG_STRING_MAP(SYM_PROC),
|
|
DEBUG_STRING_MAP(SYM_ENDPROC),
|
|
DEBUG_STRING_MAP(SYM_HALT),
|
|
DEBUG_STRING_MAP(SYM_IF),
|
|
DEBUG_STRING_MAP(SYM_ENDIF),
|
|
DEBUG_STRING_MAP(SYM_DO),
|
|
DEBUG_STRING_MAP(SYM_RAW),
|
|
DEBUG_STRING_MAP(SYM_MATCHCASE),
|
|
DEBUG_STRING_MAP(SYM_SET),
|
|
DEBUG_STRING_MAP(SYM_PORT),
|
|
DEBUG_STRING_MAP(SYM_DATABITS),
|
|
DEBUG_STRING_MAP(SYM_STOPBITS),
|
|
DEBUG_STRING_MAP(SYM_PARITY),
|
|
DEBUG_STRING_MAP(SYM_NONE),
|
|
DEBUG_STRING_MAP(SYM_EVEN),
|
|
DEBUG_STRING_MAP(SYM_MARK),
|
|
DEBUG_STRING_MAP(SYM_SPACE),
|
|
DEBUG_STRING_MAP(SYM_SCREEN),
|
|
DEBUG_STRING_MAP(SYM_ON),
|
|
DEBUG_STRING_MAP(SYM_OFF),
|
|
DEBUG_STRING_MAP(SYM_NOT),
|
|
DEBUG_STRING_MAP(SYM_OR),
|
|
DEBUG_STRING_MAP(SYM_AND),
|
|
DEBUG_STRING_MAP(SYM_LEQ),
|
|
DEBUG_STRING_MAP(SYM_NEQ),
|
|
DEBUG_STRING_MAP(SYM_LT),
|
|
DEBUG_STRING_MAP(SYM_GT),
|
|
DEBUG_STRING_MAP(SYM_GEQ),
|
|
DEBUG_STRING_MAP(SYM_EQ),
|
|
DEBUG_STRING_MAP(SYM_PLUS),
|
|
DEBUG_STRING_MAP(SYM_MINUS),
|
|
DEBUG_STRING_MAP(SYM_MULT),
|
|
DEBUG_STRING_MAP(SYM_DIV),
|
|
DEBUG_STRING_MAP(SYM_LPAREN),
|
|
DEBUG_STRING_MAP(SYM_RPAREN),
|
|
DEBUG_STRING_MAP(SYM_TRUE),
|
|
DEBUG_STRING_MAP(SYM_FALSE),
|
|
DEBUG_STRING_MAP(SYM_COLON),
|
|
DEBUG_STRING_MAP(SYM_GOTO),
|
|
DEBUG_STRING_MAP(SYM_COMMA),
|
|
DEBUG_STRING_MAP(SYM_UNTIL),
|
|
};
|
|
#pragma data_seg()
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Returns the string form of a RES value.
|
|
|
|
Returns: String ptr
|
|
Cond: --
|
|
*/
|
|
LPCSTR PRIVATE Dbg_GetSym(
|
|
SYM sym)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_ELEMENTS(c_rgsymmap); i++)
|
|
{
|
|
if (c_rgsymmap[i].sym == sym)
|
|
return c_rgsymmap[i].psz;
|
|
}
|
|
return "Unknown SYM";
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Dump the token
|
|
Returns: --
|
|
Cond: --
|
|
*/
|
|
void PRIVATE Tok_Dump(
|
|
PTOK this)
|
|
{
|
|
ASSERT(this);
|
|
|
|
if (IsFlagSet(g_dwDumpFlags, DF_TOKEN))
|
|
{
|
|
switch (this->toktype)
|
|
{
|
|
case TT_BASE:
|
|
TRACE_MSG(TF_ALWAYS, "line %ld: %s, '%s'", Tok_GetLine(this),
|
|
Dbg_GetSym(Tok_GetSym(this)), Tok_GetLexeme(this));
|
|
break;
|
|
|
|
case TT_SZ: {
|
|
PTOKSZ ptoksz = (PTOKSZ)this;
|
|
|
|
TRACE_MSG(TF_ALWAYS, "line %ld: %s, {%s}", Tok_GetLine(this),
|
|
Dbg_GetSym(Tok_GetSym(this)), TokSz_GetSz(ptoksz));
|
|
}
|
|
break;
|
|
|
|
case TT_INT: {
|
|
PTOKINT ptokint = (PTOKINT)this;
|
|
|
|
TRACE_MSG(TF_ALWAYS, "line %ld: %s, {%d}", Tok_GetLine(this),
|
|
Dbg_GetSym(Tok_GetSym(this)), TokInt_GetVal(ptokint));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
ASSERT(0);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
#else // DEBUG
|
|
|
|
#define Dbg_GetSym(sym) ((LPSTR)"")
|
|
#define Tok_Dump(ptok)
|
|
|
|
#endif // DEBUG
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Creates a new token with the given symbol sym.
|
|
|
|
Returns: RES_OK
|
|
RES_E_OUTOFMEMORY
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Tok_New(
|
|
PTOK * pptok,
|
|
SYM sym,
|
|
LPCSTR pszLexeme,
|
|
DWORD iLine)
|
|
{
|
|
PTOK ptok;
|
|
|
|
ASSERT(pptok);
|
|
ASSERT(pszLexeme);
|
|
|
|
ptok = GAllocType(TOK);
|
|
if (ptok)
|
|
{
|
|
Tok_SetSize(ptok, sizeof(*ptok));
|
|
Tok_SetSym(ptok, sym);
|
|
Tok_SetType(ptok, TT_BASE);
|
|
Tok_SetLine(ptok, iLine);
|
|
Tok_SetLexeme(ptok, pszLexeme);
|
|
}
|
|
*pptok = ptok;
|
|
|
|
return NULL != ptok ? RES_OK : RES_E_OUTOFMEMORY;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Destroys the given token.
|
|
Returns:
|
|
Cond: --
|
|
*/
|
|
void PUBLIC Tok_Delete(
|
|
PTOK this)
|
|
{
|
|
GFree(this);
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Duplicate the given token.
|
|
|
|
Returns: RES_OK
|
|
RES_E_OUTOFMEMORY
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Tok_Dup(
|
|
PTOK this,
|
|
PTOK * pptok)
|
|
{
|
|
PTOK ptok;
|
|
DWORD cbSize;
|
|
|
|
ASSERT(this);
|
|
ASSERT(pptok);
|
|
|
|
cbSize = Tok_GetSize(this);
|
|
|
|
ptok = GAlloc(cbSize);
|
|
if (ptok)
|
|
{
|
|
BltByte(ptok, this, cbSize);
|
|
}
|
|
*pptok = ptok;
|
|
|
|
return NULL != ptok ? RES_OK : RES_E_OUTOFMEMORY;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Creates a new string token with the given string.
|
|
|
|
Returns: RES_OK
|
|
RES_E_OUTOFMEMORY
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC TokSz_New(
|
|
PTOK * pptok,
|
|
SYM sym,
|
|
LPCSTR pszLexeme,
|
|
DWORD iLine,
|
|
LPCSTR psz)
|
|
{
|
|
PTOKSZ ptoksz;
|
|
|
|
ASSERT(pptok);
|
|
|
|
ptoksz = GAllocType(TOKSZ);
|
|
if (ptoksz)
|
|
{
|
|
Tok_SetSize(ptoksz, sizeof(*ptoksz));
|
|
Tok_SetSym(ptoksz, sym);
|
|
Tok_SetType(ptoksz, TT_SZ);
|
|
Tok_SetLine(ptoksz, iLine);
|
|
Tok_SetLexeme(ptoksz, pszLexeme);
|
|
if (psz)
|
|
TokSz_SetSz(ptoksz, psz);
|
|
else
|
|
*ptoksz->sz = 0;
|
|
}
|
|
*pptok = (PTOK)ptoksz;
|
|
|
|
return NULL != ptoksz ? RES_OK : RES_E_OUTOFMEMORY;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Creates a new integer token with the given value.
|
|
|
|
Returns: RES_OK
|
|
RES_E_OUTOFMEMORY
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC TokInt_New(
|
|
PTOK * pptok,
|
|
SYM sym,
|
|
LPCSTR pszLexeme,
|
|
DWORD iLine,
|
|
int n)
|
|
{
|
|
PTOKINT ptokint;
|
|
|
|
ASSERT(pptok);
|
|
|
|
ptokint = GAllocType(TOKINT);
|
|
if (ptokint)
|
|
{
|
|
Tok_SetSize(ptokint, sizeof(*ptokint));
|
|
Tok_SetSym(ptokint, sym);
|
|
Tok_SetType(ptokint, TT_INT);
|
|
Tok_SetLine(ptokint, iLine);
|
|
Tok_SetLexeme(ptokint, pszLexeme);
|
|
TokInt_SetVal(ptokint, n);
|
|
}
|
|
*pptok = (PTOK)ptokint;
|
|
|
|
return NULL != ptokint ? RES_OK : RES_E_OUTOFMEMORY;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Compare two strings. This function does not take
|
|
localization into account, so the comparison of two
|
|
strings will be based off the English code page.
|
|
|
|
This is required because the lexical keyword table
|
|
is hand-sorted to the English language. Using the
|
|
NLS lstrcmp would not produce the correct results.
|
|
|
|
Returns: strcmp standard
|
|
Cond: --
|
|
*/
|
|
int PRIVATE strcmpraw(
|
|
LPCSTR psz1,
|
|
LPCSTR psz2)
|
|
{
|
|
for (; *psz1 == *psz2;
|
|
psz1 = CharNext(psz1),
|
|
psz2 = CharNext(psz2))
|
|
{
|
|
if (0 == *psz1)
|
|
return 0;
|
|
}
|
|
return *psz1 - *psz2;
|
|
}
|
|
|
|
|
|
#ifdef DEBUG
|
|
/*----------------------------------------------------------
|
|
Purpose: Returns the SYM value that matches the given lexeme.
|
|
If the given lexeme is not found in the list of
|
|
keyword token values, then SYM_IDENT is returned.
|
|
|
|
Performs a linear search.
|
|
|
|
Returns: see above
|
|
Cond: --
|
|
*/
|
|
SYM PRIVATE SymFromKeywordLinear(
|
|
LPCSTR pszLex)
|
|
{
|
|
int i;
|
|
|
|
ASSERT(pszLex);
|
|
|
|
for (i = 0; i < ARRAY_ELEMENTS(c_rglexKeywords); i++)
|
|
{
|
|
// Case-sensitive
|
|
if (0 == strcmpraw(c_rglexKeywords[i].pszLexeme, pszLex))
|
|
{
|
|
return c_rglexKeywords[i].sym;
|
|
}
|
|
}
|
|
return SYM_IDENT;
|
|
}
|
|
#endif
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Returns the SYM value that matches the given lexeme.
|
|
If the given lexeme is not found in the list of
|
|
keyword token values, then SYM_IDENT is returned.
|
|
|
|
Peforms a binary search.
|
|
|
|
Returns: see above
|
|
Cond: --
|
|
*/
|
|
SYM PRIVATE SymFromKeyword(
|
|
LPCSTR pszLex)
|
|
{
|
|
static const s_cel = ARRAY_ELEMENTS(c_rglexKeywords);
|
|
|
|
SYM symRet = SYM_IDENT; // assume no match
|
|
int nCmp;
|
|
int iLow = 0;
|
|
int iMid;
|
|
int iHigh = s_cel - 1;
|
|
|
|
ASSERT(pszLex);
|
|
|
|
// (OK for cp == 0. Duplicate lexemes not allowed.)
|
|
|
|
while (iLow <= iHigh)
|
|
{
|
|
iMid = (iLow + iHigh) / 2;
|
|
|
|
nCmp = strcmpraw(pszLex, c_rglexKeywords[iMid].pszLexeme);
|
|
|
|
if (0 > nCmp)
|
|
iHigh = iMid - 1; // First is smaller
|
|
else if (0 < nCmp)
|
|
iLow = iMid + 1; // First is larger
|
|
else
|
|
{
|
|
// Match
|
|
symRet = c_rglexKeywords[iMid].sym;
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Check if we get the same result with linear search
|
|
ASSERT(SymFromKeywordLinear(pszLex) == symRet);
|
|
|
|
return symRet;
|
|
}
|
|
|
|
|
|
//
|
|
// Stxerr
|
|
//
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Initializes a syntax error structure
|
|
|
|
Returns: --
|
|
Cond: --
|
|
*/
|
|
void PUBLIC Stxerr_Init(
|
|
PSTXERR this,
|
|
LPCSTR pszLex,
|
|
DWORD iLine,
|
|
RES res)
|
|
{
|
|
ASSERT(this);
|
|
ASSERT(pszLex);
|
|
|
|
lstrcpyn(this->szLexeme, pszLex, sizeof(this->szLexeme));
|
|
this->iLine = iLine;
|
|
this->res = res;
|
|
}
|
|
|
|
|
|
//
|
|
// Scanner
|
|
//
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Returns TRUE if the scanner structure is valid
|
|
to read a file.
|
|
|
|
Returns: See above
|
|
Cond: --
|
|
*/
|
|
BOOL PRIVATE Scanner_Validate(
|
|
PSCANNER this)
|
|
{
|
|
return (this &&
|
|
(IsFlagSet(this->dwFlags, SCF_NOSCRIPT) ||
|
|
INVALID_HANDLE_VALUE != this->hfile) &&
|
|
this->pbBuffer &&
|
|
this->psci);
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Creates a scanner.
|
|
|
|
Returns: RES_OK
|
|
RES_E_OUTOFMEMORY
|
|
RES_E_INVALIDPARAM
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Scanner_Create(
|
|
PSCANNER * ppscanner,
|
|
PSESS_CONFIGURATION_INFO psci)
|
|
{
|
|
RES res;
|
|
|
|
DBG_ENTER(Scanner_Create);
|
|
|
|
ASSERT(ppscanner);
|
|
ASSERT(psci);
|
|
|
|
if (ppscanner)
|
|
{
|
|
PSCANNER pscanner;
|
|
|
|
res = RES_OK; // assume success
|
|
|
|
pscanner = GAllocType(SCANNER);
|
|
if (!pscanner)
|
|
res = RES_E_OUTOFMEMORY;
|
|
else
|
|
{
|
|
pscanner->pbBuffer = GAlloc(SCANNER_BUF_SIZE);
|
|
if (!pscanner->pbBuffer)
|
|
res = RES_E_OUTOFMEMORY;
|
|
else
|
|
{
|
|
if ( !SACreate(&pscanner->hsaStxerr, sizeof(STXERR), 8) )
|
|
res = RES_E_OUTOFMEMORY;
|
|
else
|
|
{
|
|
pscanner->hfile = INVALID_HANDLE_VALUE;
|
|
pscanner->psci = psci;
|
|
SetFlag(pscanner->dwFlags, SCF_NOSCRIPT);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (RFAILED(res))
|
|
{
|
|
Scanner_Destroy(pscanner);
|
|
pscanner = NULL;
|
|
}
|
|
|
|
*ppscanner = pscanner;
|
|
}
|
|
else
|
|
res = RES_E_INVALIDPARAM;
|
|
|
|
DBG_EXIT_RES(Scanner_Create, res);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Destroys a scanner.
|
|
|
|
Returns: RES_OK
|
|
RES_E_INVALIDPARAM
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Scanner_Destroy(
|
|
PSCANNER this)
|
|
{
|
|
RES res;
|
|
|
|
DBG_ENTER(Scanner_Destroy);
|
|
|
|
if (this)
|
|
{
|
|
if (INVALID_HANDLE_VALUE != this->hfile)
|
|
{
|
|
TRACE_MSG(TF_GENERAL, "Closing script");
|
|
CloseHandle(this->hfile);
|
|
}
|
|
|
|
if (this->pbBuffer)
|
|
{
|
|
GFree(this->pbBuffer);
|
|
}
|
|
|
|
if (this->hsaStxerr)
|
|
{
|
|
SADestroy(this->hsaStxerr);
|
|
}
|
|
|
|
GFree(this);
|
|
res = RES_OK;
|
|
}
|
|
else
|
|
res = RES_E_INVALIDPARAM;
|
|
|
|
DBG_EXIT_RES(Scanner_Destroy, res);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Opens a script file and associates it with this scanner.
|
|
|
|
Returns: RES_OK
|
|
RES_E_FAIL (script cannot be opened)
|
|
RES_E_INVALIDPARAM
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Scanner_OpenScript(
|
|
PSCANNER this,
|
|
LPCSTR pszPath)
|
|
{
|
|
RES res;
|
|
|
|
DBG_ENTER_SZ(Scanner_OpenScript, pszPath);
|
|
|
|
if (this && pszPath)
|
|
{
|
|
DEBUG_BREAK(BF_ONOPEN);
|
|
|
|
// (shouldn't have a file open already)
|
|
ASSERT(INVALID_HANDLE_VALUE == this->hfile);
|
|
|
|
// Open script
|
|
this->hfile = CreateFile(pszPath, GENERIC_READ, FILE_SHARE_READ,
|
|
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
|
|
|
|
if (INVALID_HANDLE_VALUE == this->hfile)
|
|
{
|
|
TRACE_MSG(TF_GENERAL, "Failed to open script \"%s\"", pszPath);
|
|
|
|
res = RES_E_FAIL;
|
|
}
|
|
//
|
|
// .Net bug# 522307 Specifying the dialup script file as the COM
|
|
// Port of the Modem will cause explorer to AV.
|
|
//
|
|
else if (GetFileType(this->hfile) != FILE_TYPE_DISK)
|
|
{
|
|
res = RES_E_FAIL;
|
|
}
|
|
else
|
|
{
|
|
// Reset buffer fields
|
|
TRACE_MSG(TF_GENERAL, "Opened script \"%s\"", pszPath);
|
|
|
|
lstrcpyn(this->szScript, pszPath, sizeof(this->szScript));
|
|
lstrcpyn(g_szScript, pszPath, sizeof(g_szScript));
|
|
|
|
ClearFlag(this->dwFlags, SCF_NOSCRIPT);
|
|
|
|
this->pbCur = this->pbBuffer;
|
|
this->cbUnread = 0;
|
|
this->chUnget = 0;
|
|
this->chTailByte = 0;
|
|
this->iLine = 1;
|
|
res = RES_OK;
|
|
}
|
|
}
|
|
else
|
|
res = RES_E_INVALIDPARAM;
|
|
|
|
DBG_EXIT_RES(Scanner_OpenScript, res);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Reads enough bytes from the file to fill the buffer.
|
|
|
|
Returns: RES_OK
|
|
RES_E_FAIL (if ReadFile failed)
|
|
RES_E_EOF
|
|
|
|
Cond: --
|
|
*/
|
|
RES PRIVATE Scanner_Read(
|
|
PSCANNER this)
|
|
{
|
|
RES res;
|
|
BOOL bResult;
|
|
LPBYTE pb;
|
|
DWORD cb;
|
|
DWORD cbUnread;
|
|
|
|
DBG_ENTER(Scanner_Read);
|
|
|
|
ASSERT(Scanner_Validate(this));
|
|
|
|
// Move the unread bytes to the front of the buffer before reading
|
|
// more bytes. This function may get called when there are still
|
|
// some unread bytes in the buffer. We do not want to lose those
|
|
// bytes.
|
|
|
|
// I'm too lazy to make this a circular buffer.
|
|
BltByte(this->pbBuffer, this->pbCur, this->cbUnread);
|
|
this->pbCur = this->pbBuffer;
|
|
|
|
pb = this->pbBuffer + this->cbUnread;
|
|
cb = (DWORD)(SCANNER_BUF_SIZE - (pb - this->pbBuffer));
|
|
bResult = ReadFile(this->hfile, pb, cb, &cbUnread, NULL);
|
|
if (!bResult)
|
|
{
|
|
res = RES_E_FAIL;
|
|
}
|
|
else
|
|
{
|
|
// End of file?
|
|
if (0 == cbUnread)
|
|
{
|
|
// Yes
|
|
res = RES_E_EOF;
|
|
}
|
|
else
|
|
{
|
|
// No
|
|
this->cbUnread += cbUnread;
|
|
|
|
res = RES_OK;
|
|
}
|
|
}
|
|
|
|
DBG_EXIT_RES(Scanner_Read, res);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Gets the next character in the file (buffer). This
|
|
function will scan the file buffer using CharNext,
|
|
and store the current byte in chCur.
|
|
|
|
Note for DBCS characters this means that only the
|
|
lead byte will be stored in chCur. If chCur is a
|
|
lead byte, the trailing byte will be stored in
|
|
chTailByte.
|
|
|
|
Returns: RES_OK
|
|
RES_E_EOF
|
|
Cond: --
|
|
*/
|
|
RES PRIVATE Scanner_GetChar(
|
|
PSCANNER this)
|
|
{
|
|
RES res = RES_OK; // assume success
|
|
|
|
ASSERT(Scanner_Validate(this));
|
|
|
|
if (0 != this->chUnget)
|
|
{
|
|
this->chCur = this->chUnget;
|
|
this->chUnget = 0;
|
|
}
|
|
else
|
|
{
|
|
// Time to read more into the buffer?
|
|
if (0 == this->cbUnread)
|
|
{
|
|
// Yes
|
|
res = Scanner_Read(this);
|
|
}
|
|
|
|
if (RSUCCEEDED(res))
|
|
{
|
|
LPBYTE pbCur = this->pbCur;
|
|
LPBYTE pbNext = CharNext(pbCur);
|
|
DWORD cb;
|
|
BOOL bIsLeadByte;
|
|
|
|
this->chCur = *pbCur;
|
|
|
|
bIsLeadByte = IsDBCSLeadByte(this->chCur);
|
|
|
|
// We might be at the end of the unread characters, where
|
|
// a DBCS character is cut in half (ie, the trailing byte
|
|
// is missing). Are we in this case?
|
|
if (bIsLeadByte && 1 == this->cbUnread)
|
|
{
|
|
// Yes; read more into the buffer, we don't care about
|
|
// the return value
|
|
Scanner_Read(this);
|
|
|
|
// this->pbCur might have changed
|
|
pbCur = this->pbCur;
|
|
pbNext = CharNext(pbCur);
|
|
}
|
|
|
|
cb = (DWORD)(pbNext - pbCur);
|
|
|
|
this->cbUnread -= cb;
|
|
this->pbCur = pbNext;
|
|
|
|
// Do we need to save away the whole DBCS character?
|
|
if (bIsLeadByte)
|
|
{
|
|
// Yes
|
|
ASSERT(2 == cb); // We don't support MBCS
|
|
this->chTailByte = pbCur[1];
|
|
}
|
|
|
|
if (IS_EOL(this->chCur))
|
|
{
|
|
this->iLine++;
|
|
};
|
|
}
|
|
else
|
|
this->chCur = 0;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Ungets the current character back to the buffer.
|
|
|
|
Returns: RES_OK
|
|
RES_E_FAIL (if a character was already ungotten since the last get)
|
|
Cond: --
|
|
*/
|
|
RES PRIVATE Scanner_UngetChar(
|
|
PSCANNER this)
|
|
{
|
|
RES res;
|
|
|
|
ASSERT(Scanner_Validate(this));
|
|
|
|
if (0 != this->chUnget)
|
|
{
|
|
res = RES_E_FAIL;
|
|
}
|
|
else
|
|
{
|
|
this->chUnget = this->chCur;
|
|
this->chCur = 0;
|
|
res = RES_OK;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Skips white space
|
|
|
|
Returns: --
|
|
Cond: --
|
|
*/
|
|
void PRIVATE Scanner_SkipBlanks(
|
|
PSCANNER this)
|
|
{
|
|
ASSERT(Scanner_Validate(this));
|
|
|
|
while (IS_WHITESPACE(this->chCur))
|
|
{
|
|
Scanner_GetChar(this);
|
|
}
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Skips commented line
|
|
|
|
Returns: --
|
|
Cond: --
|
|
*/
|
|
void PRIVATE Scanner_SkipComment(
|
|
PSCANNER this)
|
|
{
|
|
RES res;
|
|
char chSav = this->chCur;
|
|
|
|
ASSERT(Scanner_Validate(this));
|
|
ASSERT(IS_COMMENT_LEAD(this->chCur));
|
|
|
|
// Scan to end of line
|
|
do
|
|
{
|
|
res = Scanner_GetChar(this);
|
|
} while (RES_OK == res && !IS_EOL(this->chCur));
|
|
|
|
if (IS_EOL(this->chCur))
|
|
Scanner_GetChar(this);
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Skips white space and comments
|
|
|
|
Returns: --
|
|
Cond: --
|
|
*/
|
|
void PRIVATE Scanner_SkipBadlands(
|
|
PSCANNER this)
|
|
{
|
|
ASSERT(Scanner_Validate(this));
|
|
|
|
Scanner_GetChar(this);
|
|
|
|
Scanner_SkipBlanks(this);
|
|
while (IS_COMMENT_LEAD(this->chCur))
|
|
{
|
|
Scanner_SkipComment(this);
|
|
Scanner_SkipBlanks(this);
|
|
}
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: This function scans and copies the characters that are
|
|
scanned into pszBuf until the provided callback says to stop.
|
|
|
|
Returns: RES_OK
|
|
RES_E_OUTOFMEMORY
|
|
|
|
Cond: --
|
|
*/
|
|
RES PRIVATE Scanner_ScanForCharacters(
|
|
PSCANNER this,
|
|
LPSTR pszBuf,
|
|
UINT cbBuf,
|
|
SCANEVALPROC pfnEval,
|
|
LPARAM lParam)
|
|
{
|
|
RES res = RES_E_MOREDATA;
|
|
|
|
ASSERT(this);
|
|
ASSERT(pszBuf);
|
|
ASSERT(pfnEval);
|
|
|
|
// Don't use CharNext because we are iterating on a single-byte
|
|
// basis.
|
|
for (; 0 < cbBuf; cbBuf--, pszBuf++)
|
|
{
|
|
res = Scanner_GetChar(this);
|
|
if (RES_OK == res)
|
|
{
|
|
// Delimiter?
|
|
BOOL bEatIt = FALSE;
|
|
|
|
if (pfnEval(this->chCur, &bEatIt, lParam))
|
|
{
|
|
if (!bEatIt)
|
|
Scanner_UngetChar(this);
|
|
break; // done
|
|
}
|
|
|
|
// Save the whole DBCS character?
|
|
if (IsDBCSLeadByte(this->chCur))
|
|
{
|
|
// Yes; is there enough room?
|
|
if (2 <= cbBuf)
|
|
{
|
|
// Yes
|
|
*pszBuf = this->chCur;
|
|
pszBuf++; // Increment by single byte
|
|
cbBuf--;
|
|
*pszBuf = this->chTailByte;
|
|
}
|
|
else
|
|
{
|
|
// No; stop iterating
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// No; this is just a single byte
|
|
*pszBuf = this->chCur;
|
|
}
|
|
}
|
|
else
|
|
break;
|
|
}
|
|
|
|
*pszBuf = 0; // add terminator
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Determines if the given character is a delimiter
|
|
for a keyword.
|
|
|
|
Returns: TRUE (if the character is a delimiter)
|
|
FALSE (otherwise)
|
|
|
|
Cond: --
|
|
*/
|
|
BOOL CALLBACK EvalKeywordChar(
|
|
char ch, // Always the first byte of a DBCS character
|
|
LPBOOL pbEatIt, // Default is FALSE on entry
|
|
LPARAM lparam)
|
|
{
|
|
return !IS_KEYWORD(ch);
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Scans for the keyword. Returns a new token.
|
|
|
|
Returns: RES_OK
|
|
RES_E_OUTOFMEMORY
|
|
|
|
Cond: --
|
|
*/
|
|
RES PRIVATE Scanner_GetKeywordTok(
|
|
PSCANNER this,
|
|
PTOK * pptok)
|
|
{
|
|
char sz[MAX_BUF_KEYWORD];
|
|
UINT cbBuf;
|
|
SYM sym;
|
|
|
|
ASSERT(this);
|
|
ASSERT(pptok);
|
|
|
|
*sz = this->chCur;
|
|
cbBuf = sizeof(sz) - 1 - 1; // reserve place for terminator
|
|
|
|
Scanner_ScanForCharacters(this, &sz[1], cbBuf, EvalKeywordChar, 0);
|
|
|
|
sym = SymFromKeyword(sz);
|
|
return Tok_New(pptok, sym, sz, this->iLine);
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Determines if the given character is a delimiter
|
|
for a string constant.
|
|
|
|
*pbEatIt is set to TRUE if the character must be
|
|
eaten (not copied to the buffer). Only used if
|
|
this function returns TRUE.
|
|
|
|
Returns: TRUE (if the character is a delimiter)
|
|
FALSE (otherwise)
|
|
|
|
Cond: --
|
|
*/
|
|
BOOL CALLBACK EvalStringChar(
|
|
char ch, // Always the first byte of a DBCS character
|
|
LPBOOL pbEatIt, // Default is FALSE on entry
|
|
LPARAM lparam)
|
|
{
|
|
BOOL bRet;
|
|
PBOOL pbEncounteredBS = (PBOOL)lparam;
|
|
BOOL bBS = *pbEncounteredBS;
|
|
|
|
*pbEncounteredBS = FALSE;
|
|
|
|
if (IS_QUOTE(ch))
|
|
{
|
|
// Is this after
|
|
if (bBS)
|
|
bRet = FALSE;
|
|
else
|
|
{
|
|
*pbEatIt = TRUE;
|
|
bRet = TRUE;
|
|
}
|
|
}
|
|
else if (IS_BACKSLASH(ch))
|
|
{
|
|
if (!bBS)
|
|
*pbEncounteredBS = TRUE;
|
|
bRet = FALSE;
|
|
}
|
|
else
|
|
bRet = FALSE;
|
|
|
|
return bRet;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Scans for the string constant. Returns a new token.
|
|
|
|
Returns: RES_OK
|
|
RES_E_OUTOFMEMORY
|
|
|
|
Cond: --
|
|
*/
|
|
RES PRIVATE Scanner_GetStringTok(
|
|
PSCANNER this,
|
|
PTOK * pptok)
|
|
{
|
|
char sz[MAX_BUF];
|
|
UINT cbBuf;
|
|
BOOL bBS;
|
|
|
|
ASSERT(this);
|
|
ASSERT(pptok);
|
|
|
|
*sz = 0;
|
|
cbBuf = sizeof(sz) - 1; // reserve place for terminator
|
|
bBS = FALSE;
|
|
|
|
Scanner_ScanForCharacters(this, sz, cbBuf, EvalStringChar, (LPARAM)&bBS);
|
|
|
|
return TokSz_New(pptok, SYM_STRING_LITERAL, "\"", this->iLine, sz);
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Determines if the given character is a delimiter
|
|
for a keyword.
|
|
|
|
Returns: TRUE (if the character is a delimiter)
|
|
FALSE (otherwise)
|
|
|
|
Cond: --
|
|
*/
|
|
BOOL CALLBACK EvalNumberChar(
|
|
char ch, // Always the first byte of a DBCS character
|
|
LPBOOL pbEatIt, // Default is FALSE on entry
|
|
LPARAM lparam)
|
|
{
|
|
return !IS_DIGIT(ch);
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Scans for the number constant. Returns a new token.
|
|
|
|
Returns: RES_OK
|
|
RES_E_OUTOFMEMORY
|
|
|
|
Cond: --
|
|
*/
|
|
RES PRIVATE Scanner_GetNumberTok(
|
|
PSCANNER this,
|
|
PTOK * pptok)
|
|
{
|
|
char sz[MAX_BUF];
|
|
UINT cbBuf;
|
|
int n;
|
|
|
|
ASSERT(this);
|
|
ASSERT(pptok);
|
|
|
|
*sz = this->chCur;
|
|
cbBuf = sizeof(sz) - 1 - 1; // reserve place for terminator
|
|
|
|
Scanner_ScanForCharacters(this, &sz[1], cbBuf, EvalNumberChar, 0);
|
|
|
|
n = AnsiToInt(sz);
|
|
return TokInt_New(pptok, SYM_INT_LITERAL, sz, this->iLine, n);
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Scans for the punctuation. Returns a new token.
|
|
|
|
Returns: RES_OK
|
|
RES_E_OUTOFMEMORY
|
|
|
|
Cond: --
|
|
*/
|
|
RES PRIVATE Scanner_GetPuncTok(
|
|
PSCANNER this,
|
|
PTOK * pptok)
|
|
{
|
|
SYM sym = SYM_UNKNOWN;
|
|
char rgch[3];
|
|
char chT;
|
|
|
|
ASSERT(this);
|
|
ASSERT(pptok);
|
|
|
|
chT = this->chCur;
|
|
*rgch = this->chCur;
|
|
rgch[1] = 0;
|
|
|
|
switch (chT)
|
|
{
|
|
case '=':
|
|
case '<':
|
|
case '>':
|
|
Scanner_GetChar(this);
|
|
if ('=' == this->chCur)
|
|
{
|
|
switch (chT)
|
|
{
|
|
case '=':
|
|
sym = SYM_EQ;
|
|
break;
|
|
|
|
case '<':
|
|
sym = SYM_LEQ;
|
|
break;
|
|
|
|
case '>':
|
|
sym = SYM_GEQ;
|
|
break;
|
|
|
|
default:
|
|
// Should never get here
|
|
ASSERT(0);
|
|
break;
|
|
}
|
|
rgch[1] = this->chCur;
|
|
rgch[2] = 0;
|
|
}
|
|
else
|
|
{
|
|
switch (chT)
|
|
{
|
|
case '=':
|
|
sym = SYM_ASSIGN;
|
|
break;
|
|
|
|
case '<':
|
|
sym = SYM_LT;
|
|
break;
|
|
|
|
case '>':
|
|
sym = SYM_GT;
|
|
break;
|
|
|
|
default:
|
|
// Should never get here
|
|
ASSERT(0);
|
|
break;
|
|
}
|
|
Scanner_UngetChar(this);
|
|
}
|
|
break;
|
|
|
|
case '!':
|
|
Scanner_GetChar(this);
|
|
if ('=' == this->chCur)
|
|
{
|
|
sym = SYM_NEQ;
|
|
rgch[1] = this->chCur;
|
|
rgch[2] = 0;
|
|
}
|
|
else
|
|
{
|
|
sym = SYM_NOT;
|
|
Scanner_UngetChar(this);
|
|
}
|
|
break;
|
|
|
|
case '+':
|
|
sym = SYM_PLUS;
|
|
break;
|
|
|
|
case '-':
|
|
sym = SYM_MINUS;
|
|
break;
|
|
|
|
case '*':
|
|
sym = SYM_MULT;
|
|
break;
|
|
|
|
case '/':
|
|
sym = SYM_DIV;
|
|
break;
|
|
|
|
case '(':
|
|
sym = SYM_LPAREN;
|
|
break;
|
|
|
|
case ')':
|
|
sym = SYM_RPAREN;
|
|
break;
|
|
|
|
case ':':
|
|
sym = SYM_COLON;
|
|
break;
|
|
|
|
case ',':
|
|
sym = SYM_COMMA;
|
|
break;
|
|
|
|
default:
|
|
if (0 == this->chCur)
|
|
{
|
|
*rgch = 0;
|
|
sym = SYM_EOF;
|
|
}
|
|
else
|
|
{
|
|
sym = SYM_UNKNOWN;
|
|
}
|
|
break;
|
|
}
|
|
|
|
|
|
return Tok_New(pptok, sym, rgch, this->iLine);
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Scans for the next token. The next token is created
|
|
and returned in *pptok.
|
|
|
|
Returns: RES_OK
|
|
RES_E_FAIL (unexpected character)
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Scanner_GetToken(
|
|
PSCANNER this,
|
|
PTOK * pptok)
|
|
{
|
|
RES res;
|
|
|
|
DBG_ENTER(Scanner_GetToken);
|
|
|
|
ASSERT(Scanner_Validate(this));
|
|
ASSERT(pptok);
|
|
|
|
if (this->ptokUnget)
|
|
{
|
|
this->ptokCur = this->ptokUnget;
|
|
*pptok = this->ptokCur;
|
|
this->ptokUnget = NULL;
|
|
res = RES_OK;
|
|
}
|
|
else
|
|
{
|
|
Scanner_SkipBadlands(this);
|
|
|
|
// Is this a keyword?
|
|
if (IS_KEYWORD_LEAD(this->chCur))
|
|
{
|
|
// Yes; or maybe an identifier
|
|
res = Scanner_GetKeywordTok(this, pptok);
|
|
}
|
|
|
|
// Is this a string constant?
|
|
else if (IS_QUOTE(this->chCur))
|
|
{
|
|
// Yes
|
|
res = Scanner_GetStringTok(this, pptok);
|
|
}
|
|
|
|
// Is this a number?
|
|
else if (IS_DIGIT(this->chCur))
|
|
{
|
|
// Yes
|
|
res = Scanner_GetNumberTok(this, pptok);
|
|
}
|
|
|
|
// Is this punctuation or something else?
|
|
else
|
|
{
|
|
res = Scanner_GetPuncTok(this, pptok);
|
|
}
|
|
|
|
this->ptokCur = *pptok;
|
|
|
|
#ifdef DEBUG
|
|
if (RSUCCEEDED(res))
|
|
{
|
|
Tok_Dump(*pptok);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
DBG_EXIT_RES(Scanner_GetToken, res);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Ungets the current token.
|
|
|
|
Returns: RES_OK
|
|
|
|
RES_E_FAIL (if a token was already ungotten since the
|
|
last get)
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Scanner_UngetToken(
|
|
PSCANNER this)
|
|
{
|
|
RES res;
|
|
|
|
ASSERT(Scanner_Validate(this));
|
|
|
|
if (this->ptokUnget)
|
|
{
|
|
ASSERT(0);
|
|
res = RES_E_FAIL;
|
|
}
|
|
else
|
|
{
|
|
this->ptokUnget = this->ptokCur;
|
|
this->ptokCur = NULL;
|
|
res = RES_OK;
|
|
}
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Returns the line of the currently read token.
|
|
|
|
Returns: see above
|
|
Cond: --
|
|
*/
|
|
DWORD PUBLIC Scanner_GetLine(
|
|
PSCANNER this)
|
|
{
|
|
DWORD iLine;
|
|
|
|
ASSERT(this);
|
|
|
|
if (this->ptokUnget)
|
|
{
|
|
iLine = Tok_GetLine(this->ptokUnget);
|
|
}
|
|
else
|
|
{
|
|
iLine = this->iLine;
|
|
}
|
|
return iLine;
|
|
}
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: This function peeks at the next token and returns
|
|
the sym type.
|
|
|
|
Returns: RES_OK
|
|
|
|
RES_E_FAIL
|
|
RES_E_INVALIDPARAM
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Scanner_Peek(
|
|
PSCANNER this,
|
|
PSYM psym)
|
|
{
|
|
RES res;
|
|
PTOK ptok;
|
|
|
|
ASSERT(this);
|
|
ASSERT(psym);
|
|
|
|
DBG_ENTER(Scanner_Peek);
|
|
|
|
res = Scanner_GetToken(this, &ptok);
|
|
if (RSUCCEEDED(res))
|
|
{
|
|
*psym = Tok_GetSym(ptok);
|
|
Scanner_UngetToken(this);
|
|
res = RES_OK;
|
|
}
|
|
|
|
DBG_EXIT_RES(Scanner_Peek, res);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: This function expects that the next token that will
|
|
be read from the scanner is of the given sym type.
|
|
|
|
If the next token is of the expected type, the function
|
|
eats the token and returns RES_OK. Otherwise, the
|
|
function fails.
|
|
|
|
Returns: RES_OK
|
|
|
|
RES_E_FAIL
|
|
RES_E_INVALIDPARAM
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Scanner_ReadToken(
|
|
PSCANNER this,
|
|
SYM sym)
|
|
{
|
|
RES res;
|
|
PTOK ptok;
|
|
|
|
DBG_ENTER(Scanner_ReadToken);
|
|
|
|
res = Scanner_GetToken(this, &ptok);
|
|
if (RSUCCEEDED(res))
|
|
{
|
|
if (Tok_GetSym(ptok) == sym)
|
|
{
|
|
// Eat the token
|
|
Tok_Delete(ptok);
|
|
res = RES_OK;
|
|
}
|
|
else
|
|
{
|
|
Scanner_UngetToken(this);
|
|
res = RES_E_FAIL;
|
|
}
|
|
}
|
|
|
|
DBG_EXIT_RES(Scanner_ReadToken, res);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: This function reads the next token only if it is of
|
|
the given type.
|
|
|
|
If the next token is of the expected type, the function
|
|
eats the token and returns RES_OK. Otherwise, the
|
|
token is retained for the next read, and RES_FALSE is
|
|
returned.
|
|
|
|
If pptok is non-NULL and RES_OK is returned, the
|
|
retrieved token is returned in *pptok.
|
|
|
|
Returns: RES_OK
|
|
RES_FALSE (if the next token is not of the expected type)
|
|
|
|
RES_E_FAIL
|
|
RES_E_INVALIDPARAM
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Scanner_CondReadToken(
|
|
PSCANNER this,
|
|
SYM symExpect,
|
|
PTOK * pptok) // May be NULL
|
|
{
|
|
RES res;
|
|
PTOK ptok;
|
|
|
|
DBG_ENTER(Scanner_CondReadToken);
|
|
|
|
res = Scanner_GetToken(this, &ptok);
|
|
if (RSUCCEEDED(res))
|
|
{
|
|
if (Tok_GetSym(ptok) == symExpect)
|
|
{
|
|
// Eat the token
|
|
if (pptok)
|
|
*pptok = ptok;
|
|
else
|
|
Tok_Delete(ptok);
|
|
|
|
res = RES_OK;
|
|
}
|
|
else
|
|
{
|
|
if (pptok)
|
|
*pptok = NULL;
|
|
|
|
Scanner_UngetToken(this);
|
|
|
|
res = RES_FALSE; // not a failure
|
|
}
|
|
}
|
|
|
|
DBG_EXIT_RES(Scanner_CondReadToken, res);
|
|
|
|
return res;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Wrapper to add an error for the scanner.
|
|
|
|
Returns: resErr
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Scanner_AddError(
|
|
PSCANNER this,
|
|
PTOK ptok, // May be NULL
|
|
RES resErr)
|
|
{
|
|
STXERR stxerr;
|
|
|
|
ASSERT(this);
|
|
ASSERT(this->hsaStxerr);
|
|
|
|
// Initialize the structure
|
|
|
|
if (NULL == ptok)
|
|
{
|
|
if (RSUCCEEDED(Scanner_GetToken(this, &ptok)))
|
|
{
|
|
Stxerr_Init(&stxerr, Tok_GetLexeme(ptok), Tok_GetLine(ptok), resErr);
|
|
|
|
Tok_Delete(ptok);
|
|
}
|
|
else
|
|
{
|
|
Stxerr_Init(&stxerr, "", Scanner_GetLine(this), resErr);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
Stxerr_Init(&stxerr, Tok_GetLexeme(ptok), Tok_GetLine(ptok), resErr);
|
|
}
|
|
|
|
// Add to the list of errors
|
|
SAInsertItem(this->hsaStxerr, SA_APPEND, &stxerr);
|
|
|
|
return resErr;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Adds an error to the list.
|
|
|
|
Returns: resErr
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Stxerr_Add(
|
|
HSA hsaStxerr,
|
|
LPCSTR pszLexeme,
|
|
DWORD iLine,
|
|
RES resErr)
|
|
{
|
|
STXERR stxerr;
|
|
LPCSTR psz;
|
|
|
|
ASSERT(hsaStxerr);
|
|
|
|
if (pszLexeme)
|
|
psz = pszLexeme;
|
|
else
|
|
psz = "";
|
|
|
|
// Add to the list of errors
|
|
Stxerr_Init(&stxerr, psz, iLine, resErr);
|
|
|
|
SAInsertItem(hsaStxerr, SA_APPEND, &stxerr);
|
|
|
|
return resErr;
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Adds an error to the list.
|
|
|
|
Returns: resErr
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Stxerr_AddTok(
|
|
HSA hsaStxerr,
|
|
PTOK ptok,
|
|
RES resErr)
|
|
{
|
|
LPCSTR pszLexeme;
|
|
DWORD iLine;
|
|
|
|
ASSERT(hsaStxerr);
|
|
|
|
if (ptok)
|
|
{
|
|
pszLexeme = Tok_GetLexeme(ptok);
|
|
iLine = Tok_GetLine(ptok);
|
|
}
|
|
else
|
|
{
|
|
pszLexeme = NULL;
|
|
iLine = 0;
|
|
}
|
|
|
|
return Stxerr_Add(hsaStxerr, pszLexeme, iLine, resErr);
|
|
}
|
|
|
|
|
|
/*----------------------------------------------------------
|
|
Purpose: Shows a series of message boxes of all the errors
|
|
found in the script.
|
|
|
|
Returns: RES_OK
|
|
|
|
Cond: --
|
|
*/
|
|
RES PUBLIC Stxerr_ShowErrors(
|
|
HSA hsaStxerr,
|
|
HWND hwndOwner)
|
|
{
|
|
DWORD cel;
|
|
DWORD i;
|
|
STXERR stxerr;
|
|
|
|
#ifndef WINNT_RAS
|
|
//
|
|
// On Win95, syntax-errors are reported using a series of message-boxes.
|
|
// On NT, syntax-error information is written to a file
|
|
// named %windir%\system32\ras\script.log.
|
|
//
|
|
|
|
cel = SAGetCount(hsaStxerr);
|
|
for (i = 0; i < cel; i++)
|
|
{
|
|
BOOL bRet = SAGetItem(hsaStxerr, i, &stxerr);
|
|
ASSERT(bRet);
|
|
|
|
if (bRet)
|
|
{
|
|
UINT ids = IdsFromRes(Stxerr_GetRes(&stxerr));
|
|
if (0 != ids)
|
|
{
|
|
MsgBox(g_hinst,
|
|
hwndOwner,
|
|
MAKEINTRESOURCE(ids),
|
|
MAKEINTRESOURCE(IDS_CAP_Script),
|
|
NULL,
|
|
MB_ERROR,
|
|
g_szScript,
|
|
Stxerr_GetLine(&stxerr),
|
|
Stxerr_GetLexeme(&stxerr));
|
|
}
|
|
}
|
|
}
|
|
|
|
#else // !WINNT_RAS
|
|
|
|
RxLogErrors(((SCRIPTDATA*)hwndOwner)->hscript, (VOID*)hsaStxerr);
|
|
|
|
#endif // !WINNT_RAS
|
|
return RES_OK;
|
|
}
|
|
|