scanner: cleanup, only v.parser now depends on v.scanner

vlib/v/util/scanning.v

@@ -0,0 +1,44 @@
+module util
+
+import os
+
+[inline]
+fn is_name_char(c byte) bool {
+	return (c >= `a` && c <= `z`) || (c >= `A` && c <= `Z`) || c == `_`
+}
+
+[inline]
+fn is_nl(c byte) bool {
+	return c == `\r` || c == `\n`
+}
+
+fn contains_capital(s string) bool {
+	for c in s {
+		if c >= `A` && c <= `Z` {
+			return true
+		}
+	}
+	return false
+}
+
+// HTTPRequest  bad
+// HttpRequest  good
+fn good_type_name(s string) bool {
+	if s.len < 4 {
+		return true
+	}
+	for i in 2 .. s.len {
+		if s[i].is_capital() && s[i - 1].is_capital() && s[i - 2].is_capital() {
+			return false
+		}
+	}
+	return true
+}
+
+pub fn cescaped_path(s string) string {
+	return s.replace('\\', '\\\\')
+}
+
+pub fn is_fmt() bool {
+	return os.executable().contains('vfmt')    
+}