pivariant, enum, tiny format

libs/main/text/pistring.cpp

@@ -1391,6 +1391,31 @@ PIString PIString::takeNumber() {
 }
 
 
+PIString PIString::takeInteger() {
+	PIString ret;
+	int sz = size_s(), ws = -1, we = -1;
+	for (int i = 0; i < sz; ++i) {
+		PIChar c = at(i);
+		if (c == ' ' || c == '\t' || c == '\n' || c == '\r') {
+			if (we < 0 && ws >= 0) {
+				we = i;
+				break;
+			}
+		} else {
+			if (ws < 0) ws = i;
+			if (!c.isDigit()) {
+				we = i;
+				break;
+			}
+			if (we >= 0) break;
+		}
+	}
+	ret = mid(ws, we - ws);
+	cutLeft(we < 0 ? sz : we);
+	return ret;
+}
+
+
 //! \~\details
 //! \~english "shield" symbol prevent analysis of the next symbol
 //! \~russian Символ "shield" экранирует следующий символ