TOKEN ChkControl( void )
{
int lines_skipped;
ppctl_t old_ppctl;
if( !CompFlags.doing_macro_expansion ) {
if( CompFlags.cpp_output ) {
PrintWhiteSpace = FALSE;
}
}
while( CurrChar == '\n' ) {
if( TBreak() ) {
CErr1( ERR_BREAK_KEY_HIT );
CSuicide();
}
lines_skipped = 0;
old_ppctl = CompFlags.pre_processing;
for( ; CurrChar != EOF_CHAR; ) {
if( CompFlags.cpp_output ) {
CppPrtChar( '\n' );
}
NextChar();
if( CurrChar != PreProcChar ) {
SkipAhead();
}
if( CurrChar == EOF_CHAR )
break;
if( CurrChar == PreProcChar ) { /* start of comp control line */
PPCTL_ENABLE_EOL();
PPCTL_DISABLE_MACROS();
PreProcStmt();
PPFlush2EOL();
CompFlags.pre_processing = old_ppctl;
} else if( NestLevel != SkipLevel ) {
PPCTL_ENABLE_EOL();
PPCTL_DISABLE_MACROS();
PPNextToken(); /* get into token mode */
PPFlush2EOL();
CompFlags.pre_processing = old_ppctl;
}
if( NestLevel == SkipLevel )
break;
if( CurrChar == '\n' ) {
lines_skipped = 1;
}
}
if( CompFlags.cpp_output ) {
if( lines_skipped ) {
if( SrcFile != NULL ) { /* 14-may-92 */
EmitLine( SrcFile->src_loc.line, SrcFile->src_name );
}
}
}
}
// we have already skipped past all white space at the start of the line
CurToken = T_WHITE_SPACE;
// CurToken = ScanToken();
return( T_WHITE_SPACE );
}
static void GetAsmLine( void )
/****************************/
{
unsigned AsmErrLine;
TOKEN LastToken;
char buf[ MAX_ASM_LINE_LEN + 1 ];
PPCTL_ENABLE_EOL();
AsmErrLine = TokenLoc.line;
*buf = '\0';
if( strcmp( Buffer, "_emit" ) == 0 ) {
strcpy( buf, AsmSysDefineByte() );
NextToken();
}
LastToken = T_DOT;
for( ;; ) {
if( EndOfAsmStmt() )
break;
if(( LastToken != T_DOT ) && ( LastToken != T_BAD_CHAR ) && ( CurToken != T_XOR ))
strncat( buf, " ", MAX_ASM_LINE_LEN );
strncat( buf, Buffer, MAX_ASM_LINE_LEN );
LastToken = CurToken;
NextToken();
}
buf[ MAX_ASM_LINE_LEN ] = '\0';
if( *buf != '\0' ) {
TokenLoc.line = AsmErrLine;
AsmSysLine( buf );
}
PPCTL_DISABLE_EOL();
}
MEPTR DefineCmdLineMacro( // DEFINE A MACRO FROM THE COMMAND LINE
// (assumes position is one char after "-D")
bool many_tokes ) // - true ==> scan multiple tokens
{
MEPTR mptr;
int (*old_scanner)( void );
ppctl_t old_ppctl;
old_scanner = NextChar;
old_ppctl = PPControl;
NextChar = &SrcFileCmdLnGetChar;
PPCTL_ENABLE_EOL();
PPCTL_DISABLE_MACROS();
SrcFileCmdLnDummyOpen();
CurrChar = NextChar();
if( many_tokes ) {
mptr = MacroScan( MSCAN_CMDLN_PLUS );
} else {
mptr = MacroScan( MSCAN_CMDLN_NORMAL );
}
SrcFileCmdLnDummyClose();
NextChar = old_scanner;
PPControl = old_ppctl;
return( mptr );
}
TOKEN NextTokenSkipEOL( void )
/****************************/
{
PPCTL_DISABLE_EOL();
NextToken();
PPCTL_ENABLE_EOL();
return( CurToken );
}
REWRITE *RewritePackageFunction( PTREE multi )
/********************************************/
{
ppctl_t old_ppctl;
bool skip_first;
REWRITE *r;
unsigned depth;
unsigned asm_depth;
TOKEN_LOCN locn;
TOKEN_LOCN *plocn;
skip_first = FALSE;
r = ParseGetRecordingInProgress( &plocn );
if( r == NULL ) {
plocn = &locn;
r = newREWRITE( T_RIGHT_BRACE, &locn );
} else {
skip_first = TRUE;
}
captureMulti( r, multi, plocn );
old_ppctl = PPControl;
asm_depth = 0;
depth = 1; /* we've seen one '{' */
while( CurToken != T_EOF ) {
DbgAssert( depth != 0 );
switch( CurToken ) {
case T_NULL:
DbgAssert( asm_depth != 0 );
PPCTL_DISABLE_EOL();
if( depth == asm_depth ) {
PPCTL_DISABLE_ASM();
asm_depth = 0;
}
break;
case T___ASM:
if( asm_depth == 0 ) {
PPCTL_ENABLE_EOL();
PPCTL_ENABLE_ASM();
asm_depth = depth;
}
break;
case T_SEMI_COLON:
break;
case T_LEFT_BRACE:
case T_ALT_LEFT_BRACE:
++depth;
break;
case T_RIGHT_BRACE:
case T_ALT_RIGHT_BRACE:
--depth;
if( depth == asm_depth ) {
PPCTL_DISABLE_EOL();
PPCTL_DISABLE_ASM();
asm_depth = 0;
}
break;
default:
break;
}
if( ! skip_first ) {
saveToken( r, plocn );
}
skip_first = FALSE;
if( depth == 0 )
break;
NextToken();
if( PPControl & PPCTL_ASM ) {
PPCTL_ENABLE_EOL();
}
}
PPControl = old_ppctl;
return( r );
}
PTREE AsmStmt( void )
/*******************/
{
bool uses_auto;
AUX_INFO *auxinfo;
TOKEN skip_token;
TOKEN skip_alt_token;
PTREE expr;
TYPE fn_type;
TYPE ret_type;
SYMBOL sym;
NAME fn_name;
auto VBUF code_buffer;
ppctl_t old_ppctl;
old_ppctl = PPControl;
PPCTL_ENABLE_EOL();
PPCTL_ENABLE_ASM();
VbufInit( &code_buffer );
NextTokenSkipEOL();
AsmSysInit();
if( ( CurToken == T_LEFT_BRACE ) || ( CurToken == T_ALT_LEFT_BRACE ) ) {
NextTokenSkipEOL();
for(;;) {
getAsmLine( &code_buffer );
if( CurToken == T_RIGHT_BRACE ) break;
if( CurToken == T_ALT_RIGHT_BRACE ) break;
if( CurToken == T_EOF ) break;
NextTokenSkipEOL();
}
skip_token = T_RIGHT_BRACE;
skip_alt_token = T_ALT_RIGHT_BRACE;
} else {
getAsmLine( &code_buffer );
skip_token = skip_alt_token = T_NULL;
}
PPControl = old_ppctl;
if( ( CurToken == skip_token ) || ( CurToken == skip_alt_token ) ) {
NextToken();
}
if( AsmCodeAddress != 0 ) {
fn_name = NameDummy();
auxinfo = AsmSysCreateAux( NameStr( fn_name ) );
uses_auto = AsmSysInsertFixups( &code_buffer );
if( uses_auto ) {
AsmSysUsesAuto();
}
AsmSysDone();
ret_type = GetBasicType( TYP_VOID );
fn_type = MakeModifiableFunction( ret_type, NULL );
fn_type->u.f.pragma = auxinfo;
fn_type = CheckDupType( fn_type );
sym = SymCreateFileScope( fn_type, SC_NULL, SF_NULL, fn_name );
LinkageSet( sym, "C" );
expr = genFnCall( fn_name );
} else {
expr = NULL;
}
AsmSysFini();
VbufFree( &code_buffer );
return( expr );
}
