HTTP: Rename urlretrieve/urlload to save/load.

[simgear.git] / simgear / misc / strutils.cxx

diff --git a/simgear/misc/strutils.cxx b/simgear/misc/strutils.cxx
index 47f0b4ef82132ee7b5b82836e3727429960498b0..10a4c67941cd1031c528464aa7ebb95ed3ad3109 100644 (file)
--- a/simgear/misc/strutils.cxx
+++ b/simgear/misc/strutils.cxx
@@ -344,7 +344,24 @@ static const std::string base64_chars =
 "abcdefghijklmnopqrstuvwxyz"
 "0123456789+/";
 
-
+static const unsigned char base64_decode_map[128] =
+{
+    127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
+    127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
+    127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
+    127, 127, 127, 127, 127, 127, 127, 127, 127, 127,
+    127, 127, 127,  62, 127, 127, 127,  63,  52,  53,
+    54,  55,  56,  57,  58,  59,  60,  61, 127, 127,
+    127,  64, 127, 127, 127,   0,   1,   2,   3,   4,
+    5,   6,   7,   8,   9,  10,  11,  12,  13,  14,
+    15,  16,  17,  18,  19,  20,  21,  22,  23,  24,
+    25, 127, 127, 127, 127, 127, 127,  26,  27,  28,
+    29,  30,  31,  32,  33,  34,  35,  36,  37,  38,
+    39,  40,  41,  42,  43,  44,  45,  46,  47,  48,
+    49,  50,  51, 127, 127, 127, 127, 127
+};
+ 
+        
 static inline bool is_base64(unsigned char c) {
   return (isalnum(c) || (c == '+') || (c == '/'));
 }
@@ -353,14 +370,13 @@ static bool is_whitespace(unsigned char c) {
     return ((c == ' ') || (c == '\r') || (c == '\n'));
 }
 
-std::string decodeBase64(const std::string& encoded_string)
+void decodeBase64(const std::string& encoded_string, std::vector<unsigned char>& ret)
 {
   int in_len = encoded_string.size();
   int i = 0;
   int j = 0;
   int in_ = 0;
   unsigned char char_array_4[4], char_array_3[3];
-  std::string ret;
   
   while (in_len-- && ( encoded_string[in_] != '=')) {
     if (is_whitespace( encoded_string[in_])) {
@@ -375,14 +391,14 @@ std::string decodeBase64(const std::string& encoded_string)
     char_array_4[i++] = encoded_string[in_]; in_++;
     if (i ==4) {
       for (i = 0; i <4; i++)
-        char_array_4[i] = base64_chars.find(char_array_4[i]);
+        char_array_4[i] = base64_decode_map[char_array_4[i]];
       
       char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
       char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
       char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
       
       for (i = 0; (i < 3); i++)
-        ret += char_array_3[i];
+        ret.push_back(char_array_3[i]);
       i = 0;
     }
   }
@@ -392,16 +408,14 @@ std::string decodeBase64(const std::string& encoded_string)
       char_array_4[j] = 0;
     
     for (j = 0; j <4; j++)
-      char_array_4[j] = base64_chars.find(char_array_4[j]);
+      char_array_4[j] = base64_decode_map[char_array_4[j]];
     
     char_array_3[0] = (char_array_4[0] << 2) + ((char_array_4[1] & 0x30) >> 4);
     char_array_3[1] = ((char_array_4[1] & 0xf) << 4) + ((char_array_4[2] & 0x3c) >> 2);
     char_array_3[2] = ((char_array_4[2] & 0x3) << 6) + char_array_4[3];
     
-    for (j = 0; (j < i - 1); j++) ret += char_array_3[j];
+    for (j = 0; (j < i - 1); j++) ret.push_back(char_array_3[j]);
   }
-  
-  return ret;
 }  
 
 const char hexChar[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};