1 files changed, 53 insertions, 0 deletions

diff --git a/src/util.cc b/src/util.cc
new file mode 100644
index 0000000..2e2d305
--- a/dev/null
+++ b/src/util.cc
@@ -0,0 +1,53 @@
+#include "kingate/util.h"
+#include "kingate/exception.h"
+
+namespace kingate {
+
+    static const char *safeChars = 
+        "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+        "abcdefghijklmnopqrstuvwxyz"
+        "0123456789"
+        "_-" ;
+
+    string url_escape(const string& str) {
+        string rv = str;
+        string::size_type screwed = 0;
+        for(;;) {
+            screwed = rv.find_first_not_of(safeChars,screwed);
+            if(screwed == string::npos)
+                break;
+            while(screwed<rv.length() && !strchr(safeChars,rv.at(screwed))) {
+                char danger = rv.at(screwed);
+                if(danger==' ') {
+                    rv.replace(screwed++,1,1,'+');
+                }else{
+                    static char tmp[4] = {'%',0,0,0};
+                    snprintf(&tmp[1],3,"%02X",0xFF&(int)danger);
+                    rv.replace(screwed,1,tmp,3);
+                    screwed+=3;
+                }
+            }
+        }
+        return rv;
+    }
+    string url_unescape(const string& str) {
+        string rv = str;
+        string::size_type unscrewed = 0;
+        for(;;) {
+            unscrewed = rv.find_first_of("%+",unscrewed);
+            if(unscrewed == string::npos)
+                break;
+            if(rv.at(unscrewed)=='+') {
+                rv.replace(unscrewed++,1,1,' ');
+            }else{
+                if((rv.length()-unscrewed)<3)
+                    throw exception(CODEPOINT,"incorrectly escaped string");
+                // XXX: ensure it's hex?
+                int danger = strtol(rv.substr(unscrewed+1,2).c_str(),NULL,16);
+                rv.replace(unscrewed,3,1,danger);
+                unscrewed++;
+            }
+        }
+        return rv;
+    }
+}