From e9f8a0ee7a7778685f5af9dbc5c287662adfcbce Mon Sep 17 00:00:00 2001
From: tenox <as@tenoware.com>
Date: Sat, 27 Aug 2016 01:56:37 -0700
Subject: added urlencode

---
 urlencode.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 urlencode.c

diff --git a/urlencode.c b/urlencode.c
new file mode 100644
index 0000000..ea2e3f5
--- /dev/null
+++ b/urlencode.c
@@ -0,0 +1,56 @@
+/* To the extent possible under law, Fred Bulback has waived all copyright and related or neighboring rights to URL Encoding/Decoding in C. This work is published from: United States. */
+/* Source: http://geekhideout.com/urlcode.shtml */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+
+/* Converts a hex character to its integer value */
+char from_hex(char ch) {
+  return isdigit(ch) ? ch - '0' : tolower(ch) - 'a' + 10;
+}
+
+/* Converts an integer value to its hex character*/
+char to_hex(char code) {
+  static char hex[] = "0123456789abcdef";
+  return hex[code & 15];
+}
+
+/* Returns a url-encoded version of str */
+/* IMPORTANT: be sure to free() the returned string after use */
+char *url_encode(char *str) {
+  char *pstr = str, *buf = malloc(strlen(str) * 3 + 1), *pbuf = buf;
+  while (*pstr) {
+    if (isalnum(*pstr) || *pstr == '-' || *pstr == '_' || *pstr == '.' || *pstr == '~') 
+      *pbuf++ = *pstr;
+    else if (*pstr == ' ') 
+      *pbuf++ = '+';
+    else 
+      *pbuf++ = '%', *pbuf++ = to_hex(*pstr >> 4), *pbuf++ = to_hex(*pstr & 15);
+    pstr++;
+  }
+  *pbuf = '\0';
+  return buf;
+}
+
+/* Returns a url-decoded version of str */
+/* IMPORTANT: be sure to free() the returned string after use */
+char *url_decode(char *str) {
+  char *pstr = str, *buf = malloc(strlen(str) + 1), *pbuf = buf;
+  while (*pstr) {
+    if (*pstr == '%') {
+      if (pstr[1] && pstr[2]) {
+        *pbuf++ = from_hex(pstr[1]) << 4 | from_hex(pstr[2]);
+        pstr += 2;
+      }
+    } else if (*pstr == '+') { 
+      *pbuf++ = ' ';
+    } else {
+      *pbuf++ = *pstr;
+    }
+    pstr++;
+  }
+  *pbuf = '\0';
+  return buf;
+}
\ No newline at end of file
-- 
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