WindowsXP-SP1/com/rpc/midl/front/lexutils.cxx
2020-09-30 16:53:49 +02:00

722 lines
19 KiB
C++

// Copyright (c) 1993-1999 Microsoft Corporation
/*
** helper functions for Gerd Immeyer's grammar
**
*/
/****************************************************************************
* include files
***************************************************************************/
#pragma warning ( disable : 4514 4710 )
#include "nulldefs.h"
extern "C" {
#include <stdio.h>
#include <io.h>
#include <process.h>
#include <string.h>
#include <stdlib.h>
}
#include "common.hxx"
#include "errors.hxx"
#include "midlnode.hxx"
#include "listhndl.hxx"
#include "filehndl.hxx"
#include "lextable.hxx"
#include "lexutils.hxx"
#include "grammar.h"
#include "gramutil.hxx"
#include "cmdana.hxx"
#include "control.hxx"
#include "tlgen.hxx"
#include <float.h>
extern "C" {
#include "lex.h"
}
/****************************************************************************
* local definitions and macros
***************************************************************************/
#define warning(p) /* temp defintion to get rid of compiler probs */
#define MAX_ID_LENGTH (31)
#define MAX_DECIMAL_LENGTH (10)
#define MAX_HEX_LENGTH (8)
#define MAX_OCTAL_LENGTH (25)
/***************************************************************************
* local data
***************************************************************************/
/***************************************************************************
* local procedures
***************************************************************************/
long convert(char *, short, short);
token_t cnv_int(void);
token_t cnv_hex(void);
token_t cnv_octal(void);
token_t cnv_float(void);
inline token_t GetNextToken() {return yylex();}
inline void UngetToken(token_t token) {yyunlex(token);}
token_t name(void);
token_t map_token(token_t token);
void lex_error(int number);
/***************************************************************************
* global data
***************************************************************************/
// token_t TokenMap[LASTTOKEN];
short handle_import;
short inside_rpc;
lextype_t yylval;
token_t toktyp_G; /* token type */
short toklen_G; /* len of token string */
char *tokptr_G; /* pointer to token string */
short curr_line_G; /* current line in file */
char *curr_file_G; /* current file name */
long tokval_G; /* value of constant token */
FILE *hFile_G; /* current file */
BOOL fAbandonNumberLengthLimits;
/***************************************************************************
* external data
***************************************************************************/
extern short DebugLine;
extern NFA_INFO *pImportCntrl;
extern LexTable * pMidlLexTable;
extern short CompileMode;
extern SymTable * pBaseSymTbl;
extern CMD_ARG * pCommand;
extern ccontrol * pCompiler;
extern char LastLexChar;
/***************************************************************************
* external procedures
***************************************************************************/
token_t is_keyword( char *, short);
/***************************************************************************/
const extern short st[ 13 ][ 16 ];
const extern short ct[256];
// Used to disable identifier to keyword mapping for declspec parsing.
BOOL IdToKeywordMapping = TRUE;
#define __isdigit(c) (((c) >= '0' && (c) <= '9'))
token_t cnv_int(void)
{
LastLexChar = NewCCGetch();
int chBeyond = NewCCGetch();
NewCCputbackc((char)chBeyond);
if( LastLexChar == '.' && chBeyond!= '.')
{
STATUS_T Status = STATUS_OK;
short LengthCollected = (short)strlen(tokptr_G);
char * ptr = &tokptr_G[LengthCollected];
char ch = LastLexChar;
*ptr++ = ch;
*ptr++ = ch = NewCCGetch();
if (__isdigit(ch))
{
*ptr++ = ch = NewCCGetch();
while (__isdigit(ch))
{
*ptr++ = ch = NewCCGetch();
}
if (ch == 'e' || ch == 'E')
{
*ptr++ = ch = NewCCGetch();
if (ch == '-' || ch == '+')
{
*ptr++ = ch = NewCCGetch();
if (__isdigit(ch))
{
*ptr++ = ch = NewCCGetch();
while (__isdigit(ch))
{
*ptr++ = ch = NewCCGetch();
}
}
else
{
Status = ERROR_PARSING_NUMERICAL;
}
}
else if (__isdigit(ch))
{
*ptr++ = ch = NewCCGetch();
while (__isdigit(ch))
{
*ptr++ = ch = NewCCGetch();
}
}
}
}
else
{
Status = ERROR_PARSING_NUMERICAL;
}
if (Status != STATUS_OK)
{
ParseError( Status, (char *)0 );
exit( Status );
}
*ptr = 0;
token_t tokenType = DOUBLECONSTANT;
double d = atof(tokptr_G);
if (ch != 'l' && ch != 'L')
{
NewCCputbackc(ch);
*(ptr-1) = 0;
tokenType = unsigned short( (d < FLT_MAX || d > FLT_MIN) ? FLOATCONSTANT : DOUBLECONSTANT );
}
else
{
NewCCputbackc(NewCCGetch());
}
if ( tokenType == DOUBLECONSTANT )
{
yylval.yy_numeric.dVal = d;
}
else
{
yylval.yy_numeric.fVal = (float) d;
}
yylval.yy_numeric.pValStr = pMidlLexTable->LexInsert(tokptr_G);
return tokenType;
}
else
{
token_t Tok = NUMERICCONSTANT;
yylval.yy_numeric.pValStr = pMidlLexTable->LexInsert(tokptr_G);
yylval.yy_numeric.Val = tokval_G = convert(tokptr_G, 10, MAX_DECIMAL_LENGTH );
if( (LastLexChar == 'L') || (LastLexChar == 'l'))
{
Tok = NUMERICLONGCONSTANT;
}
else
{
if( (LastLexChar == 'U') || (LastLexChar == 'u'))
{
Tok = NUMERICULONGCONSTANT;
if( ((LastLexChar = NewCCGetch()) != 'L') && (LastLexChar != 'l'))
{
NewCCputbackc(LastLexChar);
Tok = NUMERICUCONSTANT;
}
}
else
{
NewCCputbackc( LastLexChar );
return NUMERICCONSTANT;
}
}
return Tok;
}
}
token_t cnv_hex(void)
{
token_t Tok = HEXCONSTANT;
unsigned long Val;
yylval.yy_numeric.pValStr = pMidlLexTable->LexInsert(tokptr_G);
tokptr_G += 2; /* skip 0x */
Val = yylval.yy_numeric.Val = tokval_G = convert(tokptr_G, 16, MAX_HEX_LENGTH);
tokptr_G -= 2;
LastLexChar = NewCCGetch();
if( (LastLexChar == 'L') || (LastLexChar == 'l'))
{
Tok = HEXLONGCONSTANT;
}
else
{
// LastLexChar = NewCCGetch();
if( (LastLexChar == 'U') || (LastLexChar == 'u'))
{
Tok = HEXULONGCONSTANT;
if( ((LastLexChar = NewCCGetch()) != 'L') && (LastLexChar != 'l'))
{
NewCCputbackc(LastLexChar);
Tok = HEXUCONSTANT;
}
}
else
{
NewCCputbackc(LastLexChar);
return HEXCONSTANT;
}
}
return Tok;
}
token_t cnv_octal(void)
{
token_t Tok = OCTALCONSTANT;
unsigned long Val;
yylval.yy_numeric.pValStr = pMidlLexTable->LexInsert(tokptr_G);
Val = yylval.yy_numeric.Val = tokval_G = convert(tokptr_G, 8, MAX_OCTAL_LENGTH);
LastLexChar = NewCCGetch();
if( (LastLexChar == 'L') || (LastLexChar == 'l'))
{
Tok = OCTALLONGCONSTANT;
}
else
{
// LastLexChar = NewCCGetch();
if( (LastLexChar == 'U') || (LastLexChar == 'u'))
{
Tok = OCTALULONGCONSTANT;
if( ((LastLexChar = NewCCGetch()) != 'L') && (LastLexChar != 'l'))
{
NewCCputbackc(LastLexChar);
Tok = OCTALUCONSTANT;
}
}
else
{
NewCCputbackc(LastLexChar);
return OCTALCONSTANT;
}
}
return Tok;
}
token_t cnv_float(void)
{
warning("floating point constants not allowed");
yylval.yy_numeric.Val = tokval_G = 0;
lex_error(101);
yylval.yy_numeric.pValStr = pMidlLexTable->LexInsert(tokptr_G);
return NUMERICCONSTANT;
}
long convert(char *ptr, short base, short MaxSize)
{
REG long answer = 0;
REG char ch;
BOOL fZeroIsNotALeadingZeroAnymore = FALSE;
short count = 0;
while ((ch = *ptr++) != 0)
{
if ((ch & 0x5f) >= 'A')
answer = answer * base + (ch & 0x5f) - 'A'+ 10;
else
answer = answer * base + ch - '0';
if( ch == '0')
{
if( fZeroIsNotALeadingZeroAnymore )
count++;
}
else
{
fZeroIsNotALeadingZeroAnymore = TRUE;
count++;
}
}
if( ( count > MaxSize ) && !fAbandonNumberLengthLimits )
{
ParseError( CONSTANT_TOO_BIG, (char *)NULL );
}
return answer;
}
void SkipToToken(token_t token)
{
token_t NextToken;
do {
NextToken = GetNextToken();
} while( ( token != NextToken) && (EOI != NextToken) );
}
MODIFIER_SET ParseUnknownDeclSpecItem(char *pIdentifier)
{
INITIALIZED_MODIFIER_SET ModifierSet;
unsigned long Level = 0;
char AppendTxt[512];
unsigned int CurChar = 0;
memset( AppendTxt, '\0', sizeof(AppendTxt) );
const unsigned int MaxCurChar = 512 - 1 - sizeof(')') - sizeof(' ') - sizeof('\0');
char ch;
short ci;
for(;;) // skip white space
{
ci = ct[ (unsigned char)(ch = NewCCGetch()) ];
if (0 == st[ 0 ][ ci & 0x00ff ])
{
AppendTxt[CurChar++] = ch;
if ( CurChar >= MaxCurChar )
{
ParseError(SYNTAX_ERROR, "Invalid _declspec");
return ModifierSet;
}
}
else
break;
}
if ('(' == ch)
{
// identifier(...) form
Level++;
AppendTxt[CurChar++] = '(';
do
{
ch = NewCCGetch();
switch(ch)
{
case 0:
//end of file
goto Exit;
case '(':
Level++;
break;
case ')':
Level--;
break;
}
AppendTxt[CurChar++] = ch;
if ( CurChar >= MaxCurChar )
{
ParseError(SYNTAX_ERROR, "Invalid _declspec");
return ModifierSet;
}
}
while ( Level );
}
else
{
NewCCputbackc(ch);
}
Exit:
AppendTxt[CurChar++] = ')';
AppendTxt[CurChar++] = ' ';
size_t StringLength = sizeof("__declspec(") + strlen(pIdentifier) + CurChar + sizeof('\0');
char *UnknownDeclspec = new char[StringLength];
strcpy( UnknownDeclspec, "__declspec(");
strcat( UnknownDeclspec, pIdentifier );
strcat( UnknownDeclspec, AppendTxt);
ModifierSet.SetDeclspecUnknown( UnknownDeclspec );
delete[] UnknownDeclspec;
return ModifierSet;
}
#pragma warning(push)
#pragma warning( disable : 4244 ) // disable long to short conversion warning
MODIFIER_SET ParseDeclSpecAlign()
{
unsigned short AlignmentValue = 8;
toktyp_G = GetNextToken();
if (toktyp_G != '(')
{
ParseError( BENIGN_SYNTAX_ERROR, "( expected after _declspec( align");
UngetToken(toktyp_G);
goto exit;
}
toktyp_G = GetNextToken();
switch(toktyp_G)
{
case NUMERICCONSTANT:
case NUMERICLONGCONSTANT:
case HEXCONSTANT:
case HEXLONGCONSTANT:
case OCTALCONSTANT:
case OCTALLONGCONSTANT:
case NUMERICUCONSTANT:
case NUMERICULONGCONSTANT:
case HEXUCONSTANT:
case HEXULONGCONSTANT:
case OCTALUCONSTANT:
case OCTALULONGCONSTANT:
break; //valid case
default:
ParseError( MSCDECL_INVALID_ALIGN, NULL);
SkipToToken(')');
goto exit;
}
//Check if value is nonzero power of 2 <= 8192
switch((long)tokval_G)
{
case 1:
case 2:
case 4:
case 8:
case 16:
case 32:
case 64:
case 128:
case 256:
case 512:
case 1024:
case 2048:
case 4096:
case 8192:
AlignmentValue = (unsigned short)tokval_G;
break; //valid case
default:
ParseError( MSCDECL_INVALID_ALIGN, NULL);
AlignmentValue = 8;
break;
}
toktyp_G = GetNextToken();
if (toktyp_G != ')')
{
ParseError( BENIGN_SYNTAX_ERROR, ") expected to follow _declspec(align(N \n");
SkipToToken(')');
}
exit:
INITIALIZED_MODIFIER_SET ModifierSet;
ModifierSet.SetDeclspecAlign(AlignmentValue);
ParseError( BENIGN_SYNTAX_ERROR, "_declspec(align()) is not supported." );
return ModifierSet;
}
#pragma warning(pop)
token_t ParseDeclSpec()
{
/* Parses the MS_VC declspec() syntax.
syntax: _declspec(declspeclist )
declspeclist: declspecitemlist declspecitem |
declspecitem |
nothing
declspecitem: identifier |
identifier(...)
*/
token_t LParen = GetNextToken();
if ('(' != LParen)
{
ParseError( BENIGN_SYNTAX_ERROR, "( expected after _declspec");
return LParen;
}
// Disable ID to keyword mapping.
BOOL OldIdToKeywordMapping = IdToKeywordMapping;
IdToKeywordMapping = FALSE;
INITIALIZED_MODIFIER_SET ModifierSet;
for(;;)
{
// VC skips comma, so we skip commas.
while(',' == (toktyp_G = GetNextToken()));
if (')' == toktyp_G)
{
break;
}
if (IDENTIFIER == toktyp_G || TYPENAME == toktyp_G || LIBNAME == toktyp_G)
{
if (strcmp( tokptr_G, "dllimport") == 0)
{
ModifierSet.SetModifier(ATTR_DLLIMPORT);
}
else if (strcmp( tokptr_G, "dllexport") == 0)
{
ModifierSet.SetModifier(ATTR_DLLEXPORT);
}
else if (strcmp( tokptr_G, "align") == 0)
{
ModifierSet.Merge(ParseDeclSpecAlign());
}
else
{
ModifierSet.Merge(ParseUnknownDeclSpecItem(tokptr_G));
}
}
else
{
ParseError( BENIGN_SYNTAX_ERROR, "Invalid _declspec" );
SkipToToken(')');
break;
}
}
IdToKeywordMapping = OldIdToKeywordMapping;
yylval.yy_modifiers = ModifierSet;
return (toktyp_G = KWMSCDECLSPEC);
}
const extern short ct[256];
const extern short st[13][16];
token_t name(void)
{
/* have received a name from the input file, first we */
/* check to see if it is a keyword. */
short InBracket = short( inside_rpc ? INBRACKET : 0 );
if ( IdToKeywordMapping )
toktyp_G = is_keyword(tokptr_G, InBracket);
else
toktyp_G = IDENTIFIER;
if (KWMSCDECLSPEC == toktyp_G)
{
return ParseDeclSpec();
}
if( KWSAFEARRAY == toktyp_G)
{
/* SAFEARRAY is a special case
* In order to correctly parse the ODL SAFEARRAY syntax:
* SAFEARRAY ( FOO * ) BAR;
* we look ahead at the next non white space character
* to see if it's an open parenthasis. If it is then we eat
* the character and return KWSAFEARRAY, otherwise we
* put the character back into the stream and return the
* string "SAFEARRAY" as an IDENTIFIER.
*/
char ch;
short ci;
do
ci = ct[ (unsigned char)(ch = NewCCGetch()) ];
while (0 == st[ 0 ][ ci & 0x00ff ]); /* skip white space */
if ('(' != ch)
{
NewCCputbackc(ch);
toktyp_G = IDENTIFIER;
}
}
if (toktyp_G == IDENTIFIER)
{
if( strlen( tokptr_G ) > MAX_ID_LENGTH )
{
ParseError( ID_TRUNCATED, tokptr_G );
// tokptr_G[ MAX_ID_LENGTH ] = '\0'; // dont truncate
}
/* We need to know if the identifier is followed by a period.
* If it is, it may be a library name and so we need to check
* the libary name table to see if we should return LIBNAME
* instead of TYPENAME or IDENTIFIER.
* We look ahead to the next non white space character as above;
* the difference being that we do not consume the non whitespace
* character as we would for "SAFEARRAY(".
*/
char ch;
short ci;
do
ci = ct[ (unsigned char)(ch = NewCCGetch()) ];
while (0 == st[ 0 ][ ci & 0x00ff ]); /* skip white space */
NewCCputbackc(ch);
if( '.' == ch )
{
// we need to check to see if the identifier is a library name
if (FIsLibraryName(tokptr_G))
{
toktyp_G = LIBNAME;
yylval.yy_pSymName = new char [toklen_G + 1];
strcpy(yylval.yy_pSymName, tokptr_G);
return toktyp_G;
}
}
/* Check the symbol table to see if the identifier
* is a TYPENAME.
*/
#ifdef unique_lextable
// all names go in the lex table -- this is important for the symtable search
yylval.yy_pSymName = pMidlLexTable->LexInsert(tokptr_G);
// see if the name corresponds to a base level typedef
SymKey SKey( yylval.yy_pSymName, NAME_DEF );
if( pBaseSymTbl->SymSearch( SKey ) )
{
toktyp_G = TYPENAME;
}
}
#else // unique_lextable
// see if the name corresponds to a base level typedef
SymKey SKey( tokptr_G, NAME_DEF );
named_node * pNode;
if ( ( pNode = pBaseSymTbl->SymSearch( SKey ) ) != 0 )
{
char * szTemp = new char[toklen_G + 1];
strcpy(szTemp, tokptr_G);
pNode->SetCurrentSpelling(szTemp);
toktyp_G = TYPENAME;
yylval.yy_graph = pNode;
}
else
{
yylval.yy_pSymName = pMidlLexTable->LexInsert(tokptr_G);
}
}
#endif // unique_lextable
return toktyp_G;
}
void lex_error(int number)
{
printf("lex error : %d\n", number);
}