Added next_token() function (strtok() replacement)

kernel/yosys.cc

@@ -83,6 +83,23 @@ std::string vstringf(const char *fmt, va_list ap)
 	return string;
 }
 
+std::string next_token(std::string &text, const char *sep)
+{
+	size_t pos_begin = text.find_first_not_of(sep);
+
+	if (pos_begin == string::npos)
+		pos_begin = text.size();
+
+	size_t pos_end = text.find_first_of(sep, pos_begin);
+
+	if (pos_end == string::npos)
+		pos_end = text.size();
+
+	std::string token = text.substr(pos_begin, pos_end-pos_begin);
+	text = text.substr(pos_end);
+	return token;
+}
+
 // this is very similar to fnmatch(). the exact rules used by this
 // function are:
 //
@@ -94,7 +111,7 @@ std::string vstringf(const char *fmt, va_list ap)
 // a backslash may be used to escape the next characters in the
 // pattern. each special character can also simply match itself.
 //
-static bool patmatch(const char *pattern, const char *string)
+bool patmatch(const char *pattern, const char *string)
 {
 	if (*pattern == 0)
 		return *string == 0;

kernel/yosys.h

@@ -84,7 +84,7 @@ namespace RTLIL {
 
 std::string stringf(const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
 std::string vstringf(const char *fmt, va_list ap);
-
+std::string next_token(std::string &text, const char *sep);
 bool patmatch(const char *pattern, const char *string);
 
 template<typename T> int GetSize(const T &obj) { return obj.size(); }