char *GetMacroValue( const char *name )
/*********************************************
* Now we need to check for string substitution
* $(MACRONAME:oldstring=newstring)
*/
{
char *InName;
const char *beforeSub;
char *afterSub;
char *current;
const char *new;
const char *old;
char *line;
InName = StrDupSafe( name );
current = strchr( InName, COLON );
if( current == NULL ) {
beforeSub = GetMacroValueProcess( InName );
if( beforeSub == NULL ) {
afterSub = NULL;
} else {
afterSub = StrDupSafe( beforeSub );
}
} else {
*current++ = NULLCHAR;
beforeSub = GetMacroValueProcess( InName );
if( beforeSub == NULL ) {
afterSub = NULL;
} else {
line = NULL;
// recursively expand so $(macro:sub) OK if macro contains another
if( strchr( beforeSub, DOLLAR ) != NULL ) {
UnGetCH( STRM_MAGIC );
InsString( beforeSub, FALSE );
beforeSub = line = DeMacro( TOK_MAGIC );
GetCHR(); // eat STRM_MAGIC
}
if( beforeSub == NULL ) {
afterSub = NULL;
} else {
if( getOldNewString( current, &old, &new ) == RET_SUCCESS ) {
afterSub = doStringSubstitute( beforeSub, old, new );
} else {
afterSub = NULL;
PrtMsg( ERR | LOC | INVALID_STRING_SUBSTITUTE );
}
if( line ) {
FreeSafe( line );
}
}
}
}
STATIC char *DeMacroDoubleQuote( BOOLEAN IsDoubleQuote )
/*******************************************************
* This procedure takes care of double quotes in the stream
* Note: each double quote must be paired with a double quote in the
* input stream or this will expand until the EOL a backlash double
* quote will be considered as a non-double quote.
*/
{
char buffer[_MAX_PATH];
char *current;
char *p;
VECSTR OutString;
int pos;
STRM_T s;
BOOLEAN StartDoubleQuote;
s = PreGetCH();
UnGetCH( s );
if( s == EOL || s == STRM_END || s == STRM_MAGIC ) {
return( StrDupSafe( "" ) );
}
if( s == STRM_TMP_LEX_START ) {
PreGetCH(); /* Eat STRM_TMP_LEX_START */
pos = 0;
for( s = PreGetCH(); s != STRM_MAGIC && pos < _MAX_PATH; s = PreGetCH() ) {
assert( s != EOL || s != STRM_END );
buffer[pos++] = s;
}
if( pos >= _MAX_PATH ) {
PrtMsgExit(( FTL | LOC | MAXIMUM_TOKEN_IS, _MAX_PATH - 1 )); // NOTREACHED
}
buffer[pos] = NULLCHAR;
p = StrDupSafe( buffer );
} else {
p = DeMacro( MAC_WS );
}
StartDoubleQuote = IsDoubleQuote;
for( current = p; *current != NULLCHAR; ++current ) {
if( *current == DOUBLEQUOTE ) {
if( !IsDoubleQuote ) {
/* Found the start of a Double Quoted String */
if( current != p ) {
UnGetCH( STRM_MAGIC );
InsString( StrDupSafe( current ), TRUE );
UnGetCH( STRM_TMP_LEX_START );
*current = NULLCHAR;
return( p );
}
IsDoubleQuote = TRUE;
} else {
/* Found the end of the Double Quoted String */
if( *(current + 1) != NULLCHAR) {
UnGetCH( STRM_MAGIC );
InsString( StrDupSafe( current + 1 ), TRUE );
UnGetCH( STRM_TMP_LEX_START );
*(current + 1) = NULLCHAR;
}
return( p );
}
}
}
if( !StartDoubleQuote && !IsDoubleQuote ) {
/* there are no double quotes in the text */
/* so return text as is */
return( p );
}
pos = 0;
s = PreGetCH();
while( isws( s ) ) {
buffer[pos++] = s;
s = PreGetCH();
}
buffer[pos] = NULLCHAR;
UnGetCH( s );
OutString = StartVec();
CatStrToVec( OutString, p );
FreeSafe( p );
CatStrToVec( OutString, buffer );
p = DeMacroDoubleQuote( TRUE );
CatStrToVec( OutString, p );
FreeSafe( p );
return( FinishVec( OutString ) );
}
TOKEN_T LexPath( STRM_T s )
/*********************************
* returns: ({filec}*";")+ TOK_PATH
* EOL EOL
* STRM_END STRM_END
*/
{
char path[_MAX_PATH];
char string_open;
unsigned pos;
VECSTR vec; /* we'll store file/path here */
for( ;; ) { /* get first valid character */
if( s == EOL || s == STRM_END ) {
/* now we pass this to LexParser() so that it can reset */
return( LexParser( s ) );
}
if( s == STRM_MAGIC ) {
InsString( DeMacro( TOK_EOL ), TRUE );
} else if( !isfilec( s ) && s != PATH_SPLIT && s != ';' && s != '\"' && !isws( s ) ) {
PrtMsg( ERR | LOC | EXPECTING_M, M_PATH );
} else if( !isws( s ) ) {
break;
}
s = PreGetCH(); /* keep fetching characters */
}
/* just so you know what we've got now */
assert( isfilec( s ) || s == PATH_SPLIT || s == ';' || s == '\"' );
vec = StartVec();
pos = 0;
for( ;; ) {
/*
* Extract path from stream. If double quote is found, start string mode
* and ignore all filename character specifiers and just copy all
* characters. String mode ends with another double quote. Backslash can
* be used to escape only double quotes, otherwise they are recognized
* as path seperators. If we are not in string mode character validity
* is checked against isfilec().
*/
string_open = 0;
while( pos < _MAX_PATH && s != EOL && s != STRM_END ) {
if( s == BACKSLASH ) {
s = PreGetCH();
if( s == DOUBLEQUOTE ) {
path[pos++] = DOUBLEQUOTE;
} else if( s == EOL || s == STRM_END ) {
// Handle special case when backslash is placed at end of
// line or file
path[pos++] = BACKSLASH;
} else {
path[pos++] = BACKSLASH;
// make sure we don't cross boundaries
if( pos < _MAX_PATH ) {
path[pos++] = s;
}
}
} else {
if( s == DOUBLEQUOTE ) {
string_open = !string_open;
} else {
if( string_open ) {
path[pos++] = s;
} else if( isfilec( s ) ) {
path[pos++] = s;
} else {
break; // not valid path character, break out.
}
}
}
s = PreGetCH();
}
if( string_open ) {
FreeSafe( FinishVec( vec ) );
PrtMsgExit(( FTL | LOC | ERROR_STRING_OPEN ));
}
if( pos == _MAX_PATH ) {
FreeSafe( FinishVec( vec ) );
PrtMsgExit(( FTL | LOC | MAXIMUM_TOKEN_IS, _MAX_PATH - 1 )); // NOTREACHED
}
path[pos] = NULLCHAR;
WriteVec( vec, path );
if( s != PATH_SPLIT && s != ';' ) {
break;
}
pos = 0;
path[pos++] = PATH_SPLIT;
s = PreGetCH(); /* use Pre here to allow path;&(nl)path */
}
UnGetCH( s );
CurAttr.u.ptr = FinishVec( vec );
return( TOK_PATH );
}
