Add base64 encoder/decoder at anna core functions

[anna.git] / source / core / functions.cpp

diff --git a/source/core/functions.cpp b/source/core/functions.cpp
index 6a660df..8a77994 100644 (file)
--- a/source/core/functions.cpp
+++ b/source/core/functions.cpp
@@ -37,8 +37,11 @@ using namespace std;
 
 #define PAGE_WIDTH_LENGTH      80
 
-ExclusiveHash <std::string> functions::st_stringExclusiveHash;
-ExclusiveHash <std::string, int> functions::st_string2intExclusiveHash;
+static const std::string base64_chars =
+             "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+             "abcdefghijklmnopqrstuvwxyz"
+             "0123456789+/";
+
 
 string functions::getVersion() throw() {
   static const int version = ANNA_VERSION;
@@ -94,13 +97,12 @@ throw() {
 string functions::asString(const S64 number)
 throw() {
   char aux [24];
-  sprintf(aux, "%lld", number);
-  /*#ifdef __anna64__
+  //sprintf(aux, "%lld", number);
+  #ifdef __anna64__
      sprintf (aux, "%ld", number);
   #else
      sprintf (aux, "%lld", number);
   #endif
-  */
   return string(aux);
 }
 
@@ -114,14 +116,12 @@ throw() {
 string functions::asString(const U64 number)
 throw() {
   char aux [16];
-  sprintf(aux, "%llu", number);
-  /*
+  //sprintf(aux, "%llu", number);
   #ifdef __anna64__
      sprintf (aux, "%lu", number);
   #else
      sprintf (aux, "%llu", number);
   #endif
-  */
   return string(aux);
 }
 
@@ -171,14 +171,12 @@ throw() {
 string functions::asHexString(const S64 number)
 throw() {
   char aux [32];
-  sprintf(aux, "0x%llx", number);
-  /*
+  //sprintf(aux, "0x%llx", number);
   #ifdef __anna64__
      sprintf (aux, "0x%lx", number);
   #else
      sprintf (aux, "0x%llx", number);
   #endif
-  */
   return string(aux);
 }
 
@@ -239,7 +237,6 @@ throw(RuntimeException) {
   const char* src = hexString.data();
   unsigned char hex;
   int aux;
-  int j = 0;
 
   for(int ii = 1, maxii = hexString.length(); ii < maxii; ii += 2) {
     if(isxdigit(aux = src [ii - 1]) == 0)
@@ -310,14 +307,12 @@ throw(RuntimeException) {
 S64 functions::asInteger64(const char* str)
 throw() {
   S64 number = 0;
-  sscanf(str, "%lld", &number);
-  /*
+  //sscanf(str, "%lld", &number);
   #ifdef __anna64__
     sscanf (str, "%ld", &number);
   #else
      sscanf (str, "%lld", &number);
   #endif
-  */
   return number;
 }
 
@@ -395,7 +390,7 @@ throw(RuntimeException) {
  */
 int functions::log2(const unsigned int v)
 throw() {
-  static const char LogTable256[] = {
+  static const signed char LogTable256[] = {
     -1, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
     5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
@@ -416,8 +411,8 @@ throw() {
   int r = -1;     // r will be lg(v)
   unsigned int t, tt; // temporaries
 
-  if(tt = v >> 16) {
-    r = (t = tt >> 8) ? 24 + LogTable256[t] : 16 + LogTable256[tt];
+  if((tt = v >> 16)) {
+    r = ((t = tt >> 8)) ? 24 + LogTable256[t] : 16 + LogTable256[tt];
   } else {
     r = (t = v >> 8) ? 8 + LogTable256[t] : LogTable256[v];
   }
@@ -713,7 +708,6 @@ std::string functions::getHostnameIP() throw() {
   std::string result = "";
   struct hostent *he;
   struct in_addr **addr_list;
-  struct in_addr ipv4addr;
   char hostname[128];
   gethostname(hostname, sizeof hostname);
 
@@ -1482,17 +1476,17 @@ void functions::codeIsupNumber(const isup_number_t & isupNumber, bool calledOrCa
   bool filler = isupNumber.OddEven;
   bool hasDigits = (isupNumber.Digits.size() > 0);
   byte = filler ? 0x80 : 0x00;
-  byte = byte |= isupNumber.NatureOfAddress;
+  byte |= isupNumber.NatureOfAddress;
   target += byte;
 
   if(calledOrCalling) {
     byte = isupNumber.InternalNetworkNumber << 7;
-    byte = byte |= (isupNumber.NumberingPlan << 4);
+    byte |= (isupNumber.NumberingPlan << 4);
   } else {
     byte = isupNumber.NumberIncomplete << 7;
-    byte = byte |= (isupNumber.NumberingPlan << 4);
-    byte = byte |= (isupNumber.AddressPresentationRestricted << 2);
-    byte = byte |= isupNumber.Screening;
+    byte |= (isupNumber.NumberingPlan << 4);
+    byte |= (isupNumber.AddressPresentationRestricted << 2);
+    byte |= isupNumber.Screening;
   }
 
   target += byte;
@@ -1531,3 +1525,90 @@ void functions::codeIsupNumber(const isup_number_t & isupNumber, bool calledOrCa
   memcpy(buffer, target.c_str(), length);
 }
 
+
+static inline bool is_base64(U8 c) {
+  return (isalnum(c) || (c == '+') || (c == '/'));
+}
+
+std::string functions::encodeBase64(const U8* buf, unsigned int bufLen) {
+  std::string ret;
+  int i = 0;
+  int j = 0;
+  U8 char_array_3[3];
+  U8 char_array_4[4];
+
+  while (bufLen--) {
+    char_array_3[i++] = *(buf++);
+    if (i == 3) {
+      char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
+      char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
+      char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
+      char_array_4[3] = char_array_3[2] & 0x3f;
+
+      for(i = 0; (i <4) ; i++)
+        ret += base64_chars[char_array_4[i]];
+      i = 0;
+    }
+  }
+
+  if (i)
+  {
+    for(j = i; j < 3; j++)
+      char_array_3[j] = '\0';
+
+    char_array_4[0] = (char_array_3[0] & 0xfc) >> 2;
+    char_array_4[1] = ((char_array_3[0] & 0x03) << 4) + ((char_array_3[1] & 0xf0) >> 4);
+    char_array_4[2] = ((char_array_3[1] & 0x0f) << 2) + ((char_array_3[2] & 0xc0) >> 6);
+    char_array_4[3] = char_array_3[2] & 0x3f;
+
+    for (j = 0; (j < i + 1); j++)
+      ret += base64_chars[char_array_4[j]];
+
+    while((i++ < 3))
+      ret += '=';
+  }
+
+  return ret;
+}
+
+std::string functions::decodeBase64(const std::string & encodedString) {
+  int in_len = encodedString.size();
+  int i = 0;
+  int j = 0;
+  int in_ = 0;
+  U8 char_array_4[4], char_array_3[3];
+  std::string ret;
+
+  while (in_len-- && ( encodedString[in_] != '=') && is_base64(encodedString[in_])) {
+    char_array_4[i++] = encodedString[in_]; in_++;
+    if (i ==4) {
+      for (i = 0; i <4; i++)
+        char_array_4[i] = base64_chars.find(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];
+      i = 0;
+    }
+  }
+
+  if (i) {
+    for (j = i; j <4; j++)
+      char_array_4[j] = 0;
+
+    for (j = 0; j <4; j++)
+      char_array_4[j] = base64_chars.find(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];
+  }
+
+  return ret;
+}
+