label protection

1 files changed, 22 insertions, 0 deletions

diff --git a/src/auxiliary/functions.cc b/src/auxiliary/functions.cc
index dbfc799..a6187af 100644
--- a/src/auxiliary/functions.cc
+++ b/src/auxiliary/functions.cc
@@ -143,4 +143,26 @@ void trim(std::string &text)
 	}
 }
 
+void to_label(std::string &text)
+{
+	trim(text);
+	size_t pos = 0;
+
+	while (pos < text.size()) {
+		if ((text[pos] == ' ') || (text[pos] == '-')) {
+			text[pos] = '_';
+			pos++;
+		} else if ((text[pos] >= 'A') && (text[pos] <= 'Z')) {
+			text[pos] = text[pos] + 'a' - 'A';
+			pos++;
+		} else if ((text[pos] >= 'a') && (text[pos] <= 'z')) {
+			pos++;
+		} else if ((text[pos] >= '0') && (text[pos] <= '9')) {
+			pos++;
+		} else {
+			text.erase(pos, 1);
+		}
+	}
+}
+
 }