Implemented cBase64Encoder

tools.c

@@ -4,7 +4,7 @@
  * See the main source file 'vdr.c' for copyright information and
  * how to reach the author.
  *
- * $Id: tools.c 1.106 2005/12/29 11:20:28 kls Exp $
+ * $Id: tools.c 1.107 2005/12/29 16:02:37 kls Exp $
  */
 
 #include "tools.h"
@@ -745,6 +745,58 @@ uchar *RgbToJpeg(uchar *Mem, int Width, int Height, int &Size, int Quality)
   return jcd.mem;
 }
 
+// --- cBase64Encoder --------------------------------------------------------
+
+const char *cBase64Encoder::b64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+cBase64Encoder::cBase64Encoder(const uchar *Data, int Length, int MaxResult)
+{
+  data = Data;
+  length = Length;
+  maxResult = MaxResult;
+  i = 0;
+  result = MALLOC(char, maxResult + 1);
+}
+
+cBase64Encoder::~cBase64Encoder()
+{
+  free(result);
+}
+
+const char *cBase64Encoder::NextLine(void)
+{
+  int r = 0;
+  while (i < length && r < maxResult - 3) {
+        result[r++] = b64[(data[i] >> 2) & 0x3F];
+        char c = (data[i] << 4) & 0x3F;
+        if (++i < length)
+           c |= (data[i] >> 4) & 0x0F;
+        result[r++] = b64[c];
+        if (i < length) {
+           c = (data[i] << 2) & 0x3F;
+           if (++i < length)
+              c |= (data[i] >> 6) & 0x03;
+           result[r++] = b64[c];
+           }
+        else {
+           i++;
+           result[r++] = '=';
+           }
+        if (i < length) {
+           c = data[i] & 0x3F;
+           result[r++] = b64[c];
+           }
+        else
+           result[r++] = '=';
+        i++;
+        }
+  if (r > 0) {
+     result[r] = 0;
+     return result;
+     }
+  return NULL;
+}
+
 // --- cReadLine -------------------------------------------------------------
 
 cReadLine::cReadLine(void)