Initial revision

util/cpp/skip.c

@@ -0,0 +1,64 @@
+/* $Header$ */
+/* PREPROCESSOR: INPUT SKIP FUNCTIONS */
+
+#include	"LLlex.h"
+#include	"class.h"
+#include	"input.h"
+
+int
+skipspaces(ch)
+	register int ch;
+{
+	/*	skipspaces() skips any white space and returns the first
+		non-space character.
+	*/
+	for (;;) {
+		while (class(ch) == STSKIP)
+			LoadChar(ch);
+		/* How about "\\\n"?????????	*/
+		if (ch == '/') {
+			LoadChar(ch);
+			if (ch == '*') {
+				skipcomment();
+				LoadChar(ch);
+			}
+			else	{
+				PushBack();
+				return '/';
+			}
+		}
+		else
+			return ch;
+	}
+}
+
+skipline()
+{
+	/*	skipline() skips all characters until a newline character
+		is seen, not escaped by a '\\'.
+		Any comment is skipped.
+	*/
+	register int c;
+
+	LoadChar(c);
+	while (class(c) != STNL && c != EOI) {
+		if (c == '\\') {
+			LoadChar(c);
+			if (class(c) == STNL)
+				++LineNumber;
+		}
+		if (c == '/') {
+			LoadChar(c);
+			if (c == '*')
+				skipcomment();
+			else
+				continue;
+		}
+		LoadChar(c);
+	}
+	++LineNumber;
+	if (c == EOI) {		/* garbage input...		*/
+		error("unexpected EOF while skipping text");
+		PushBack();
+	}
+}