static void skipSingleLineComment(SrcFile *sf)
{
int c;
while( (c = getChar_(sf)) != EOF){
if(c == '\n') break;
}
}
static int skipBlockComment(SrcFile *sf){
int startLine = sf->curLine;
int numCommentedLFs = 0;
int c = getChar_(sf);
while( c != EOF){
int nc = getChar_(sf);
if(c == '*' && nc == '/'){
return numCommentedLFs;
}
if(c == '\n') numCommentedLFs++;
c = nc;
}
//reached EOF
fprintf(stderr, "error: %s: line %d, unterminated comment\n", sf->filename, startLine);
exit(EXIT_FAILURE);
}
//return char except comments
static int getChar(SrcFile *sf)
{
int c = getChar_(sf);
if(c == '\\'){
int nc = getChar_(sf);
if(nc == '"'){ //escaped double-quotation
sf->inStrLiteral = !sf->inStrLiteral;
}
ungetChar_(nc, sf);
}else if(sf->inStrLiteral){
if(c == '"'){
sf->inStrLiteral = 0;
}
}else{
if(c == '/'){
int nc = getChar_(sf);
if(nc == '*'){ // block comment
sf->numCommentedLFs += skipBlockComment(sf);
c = ' ';
}else if(nc == '/'){ // single-line comment
skipSingleLineComment(sf);
c = '\n';
}else{
ungetChar_(nc, sf);
}
}else if(c == '"'){
sf->inStrLiteral = 1;
}
}
if(c == '\n'){
while(sf->numCommentedLFs > 0){
ungetChar_('\n', sf);
sf->numCommentedLFs--;
}
}
return c;
}
char StringEscaper::getChar(){
char x = getChar_();
pos++;
return x;
};
