Add convenient macro escape function

2 files changed, 28 insertions, 0 deletions

diff --git a/src/uscxml/util/String.cpp b/src/uscxml/util/String.cpp
index 6d43301..894148d 100644
--- a/src/uscxml/util/String.cpp
+++ b/src/uscxml/util/String.cpp
@@ -25,6 +25,33 @@ namespace uscxml {
 
 #define ISWHITESPACE(char) (isspace(char))
 
+std::string macro_escaped(std::string const& s) {
+    std::string returnValue="";
+    for (std::string::const_iterator iter = s.begin(), end = s.end(); iter != end; ++iter) {
+        char c = *iter;
+        if (' ' <= c and c <= '~' and c != '\\' and c != '"') {
+            returnValue += c;
+        }
+        else {
+            returnValue += '__';
+            switch(c) {
+                case '"':  returnValue += 'COLON';  break;
+                case '\\': returnValue += 'BACHSLASH'; break;
+                case '\t': returnValue += 'TAB';  break;
+                case '\r': returnValue += 'RETURN';  break;
+                case '\n': returnValue += 'NEWLINE';  break;
+                default:
+                    char const* const hexdig = "0123456789ABCDEF";
+                    returnValue += 'x';
+                    returnValue += hexdig[c >> 4];
+                    returnValue += hexdig[c & 0xF];
+            }
+            returnValue += '__';
+        }
+    }
+    return returnValue;
+}
+
 std::list<std::string> tokenize(const std::string& line, const char sep, bool trimWhiteSpace) {
 	std::list<std::string> tokens;
 
diff --git a/src/uscxml/util/String.h b/src/uscxml/util/String.h
index 5344245..b0832c8 100644
--- a/src/uscxml/util/String.h
+++ b/src/uscxml/util/String.h
@@ -25,6 +25,7 @@
 
 namespace uscxml {
 
+std::string macro_escaped(std::string const& s);
 std::list<std::string> tokenize(const std::string& line, const char seperator = ' ', bool trimWhiteSpace = true);
 std::string spaceNormalize(const std::string& text);
 bool nameMatch(const std::string& eventDescs, const std::string& event);