hello world

neo/curl/lib/escape.c

@@ -0,0 +1,128 @@
+/***************************************************************************
+ *                                  _   _ ____  _     
+ *  Project                     ___| | | |  _ \| |    
+ *                             / __| | | | |_) | |    
+ *                            | (__| |_| |  _ <| |___ 
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at http://curl.haxx.se/docs/copyright.html.
+ * 
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ * $Id: escape.c,v 1.30 2004/03/08 08:38:29 bagder Exp $
+ ***************************************************************************/
+
+/* Escape and unescape URL encoding in strings. The functions return a new
+ * allocated string or NULL if an error occurred.  */
+
+#include "setup.h"
+#include <ctype.h>
+#include <curl/curl.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* The last #include file should be: */
+#ifdef CURLDEBUG
+#include "memdebug.h"
+#endif
+
+char *curl_escape(const char *string, int length)
+{
+  size_t alloc = (length?(size_t)length:strlen(string))+1;  
+  char *ns = malloc(alloc);
+  char *testing_ptr = NULL;
+  unsigned char in;
+  size_t newlen = alloc;
+  int strindex=0;
+
+  length = alloc-1;
+  while(length--) {
+    in = *string;
+    if(!(in >= 'a' && in <= 'z') &&
+       !(in >= 'A' && in <= 'Z') &&
+       !(in >= '0' && in <= '9')) {
+      /* encode it */
+      newlen += 2; /* the size grows with two, since this'll become a %XX */
+      if(newlen > alloc) {
+        alloc *= 2;
+        testing_ptr = realloc(ns, alloc);
+        if(!testing_ptr) {
+          free( ns );
+          return NULL;
+        }
+        else {
+          ns = testing_ptr;
+        }
+      }
+      sprintf(&ns[strindex], "%%%02X", in);
+
+      strindex+=3;
+    }
+    else {
+      /* just copy this */
+      ns[strindex++]=in;
+    }
+    string++;
+  }
+  ns[strindex]=0; /* terminate it */
+  return ns;
+}
+
+#define ishex(in) ((in >= 'a' && in <= 'f') || \
+                   (in >= 'A' && in <= 'F') || \
+                   (in >= '0' && in <= '9'))
+
+char *curl_unescape(const char *string, int length)
+{
+  int alloc = (length?length:(int)strlen(string))+1;
+  char *ns = malloc(alloc);
+  unsigned char in;
+  int strindex=0;
+  long hex;
+ 
+  if( !ns ) {
+    return NULL;
+  }  
+  
+  while(--alloc > 0) {
+    in = *string;
+    if(('%' == in) && ishex(string[1]) && ishex(string[2])) {
+      /* this is two hexadecimal digits following a '%' */
+      char hexstr[3];
+      char *ptr;
+      hexstr[0] = string[1];
+      hexstr[1] = string[2];
+      hexstr[2] = 0;
+
+      hex = strtol(hexstr, &ptr, 16);
+
+      in = (unsigned char)hex; /* this long is never bigger than 255 anyway */
+      string+=2;
+      alloc-=2;
+    }
+    
+    ns[strindex++] = in;
+    string++;
+  }
+  ns[strindex]=0; /* terminate it */
+  return ns;
+}
+
+/* For operating systems/environments that use different malloc/free
+   ssystems for the app and for this library, we provide a free that uses
+   the library's memory system */
+void curl_free(void *p)
+{
+  free(p);
+}