From d2b7354c24c75a8b1c9e52bb88dfef00dcd53c26 Mon Sep 17 00:00:00 2001
From: Peter Conrad <cyrano@quisquis.de>
Date: Thu, 4 Apr 2019 14:00:20 +0200
Subject: [PATCH] Remove unused base36

---
 CMakeLists.txt                |  1 -
 include/fc/crypto/base36.hpp  |  9 ----
 src/crypto/base36.cpp         | 86 -----------------------------------
 tests/crypto/base_n_tests.cpp | 24 ----------
 4 files changed, 120 deletions(-)
 delete mode 100644 include/fc/crypto/base36.hpp
 delete mode 100644 src/crypto/base36.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fbf1ca0..f0d7f8e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -254,7 +254,6 @@ set( fc_sources
      src/crypto/aes.cpp
      src/crypto/crc.cpp
      src/crypto/city.cpp
-     src/crypto/base36.cpp
      src/crypto/base58.cpp
      src/crypto/base64.cpp
      src/crypto/bigint.cpp
diff --git a/include/fc/crypto/base36.hpp b/include/fc/crypto/base36.hpp
deleted file mode 100644
index 1cd158e..0000000
--- a/include/fc/crypto/base36.hpp
+++ /dev/null
@@ -1,9 +0,0 @@
-#pragma once
-#include <vector>
-
-namespace fc
-{
-    std::vector<char> from_base36( const std::string& b36 );
-    std::string to_base36( const std::vector<char>& vec );
-    std::string to_base36( const char* data, size_t len );
-}
diff --git a/src/crypto/base36.cpp b/src/crypto/base36.cpp
deleted file mode 100644
index c4a9d23..0000000
--- a/src/crypto/base36.cpp
+++ /dev/null
@@ -1,86 +0,0 @@
-#include <memory>
-#include <vector>
-#include <fc/crypto/bigint.hpp>
-#include <fc/io/sstream.hpp>
-#include <fc/log/logger.hpp>
-
-namespace fc
-{
-    std::string to_base36( const char* data, size_t len )
-    {
-       if( len == 0 ) return std::string();
-
-       const char* src = data;
-       int src_len = len;
-       std::unique_ptr<char[]> buffer(new char[len+1]);
-       if (*data & 0x80) {
-           buffer[0] = 0;
-           memcpy( buffer.get() + 1, data, len );
-           src = buffer.get();
-           src_len++;
-       }
-       fc::bigint value( src, src_len );
-
-       auto base36 = "0123456789abcdefghijklmnopqrstuvwxyz";
-       std::vector<char> out( static_cast<size_t>(len * 1.6) + 2 );
-       int pos = out.size() - 1;
-       out[pos] = '\0';
-       fc::bigint _36(36);
-       do {
-         if( value ) {
-           --pos;
-           out[pos] = base36[(value % _36).to_int64()];
-         }
-       } while (value /= _36);
-       while (len-- > 0 && *data++ == 0) {
-           out[--pos] = '0';
-       }
-       return &out[pos]; //std::string( &out[pos], out.size() - pos);
-    }
-
-    std::string to_base36( const std::vector<char>& vec )
-    {
-      return to_base36( (const char*)vec.data(), vec.size() );
-    }
-
-    std::vector<char> from_base36( const std::string& b36 )
-    {
-        if ( b36.empty() ) {
-           std::vector<char> empty;
-           return empty;
-        }
-
-       fc::bigint value;
-
-       fc::bigint pos = 0; 
-       fc::bigint _36(36);
-       for( auto itr = b36.rbegin(); itr != b36.rend(); ++itr )
-       {
-          if( *itr >= '0' && *itr <= '9' )
-              value = value +  _36.exp(pos) * fc::bigint(*itr - '0');
-          else if( *itr >= 'a' && *itr <= 'z' )
-              value = value + (_36.exp(pos) *  fc::bigint(10+*itr - 'a'));
-          else if( *itr >= 'A' && *itr <= 'Z' )
-              value = value + (_36.exp(pos) *  fc::bigint(10+*itr - 'A'));
-          else
-          {
-             wlog("unknown '${char}'", ("char",std::string(&*itr,1)) );
-          }
-          ++pos;
-       }
-
-       std::vector<char> bytes = value;
-       int leading_zeros = 0, len = bytes.size();
-       const char *in = b36.c_str();
-       while (*in++ == '0') { leading_zeros++; }
-       char* first = bytes.data();
-       while (len > 0 && *first == 0) { first++; len--; }
-       std::vector<char> result;
-       result.resize(leading_zeros + len, 0);
-       if (len)
-       {
-            memcpy( result.data() + leading_zeros, first, len );
-       }
-       return result;
-    }
-}
diff --git a/tests/crypto/base_n_tests.cpp b/tests/crypto/base_n_tests.cpp
index 97786a1..fbc60ce 100644
--- a/tests/crypto/base_n_tests.cpp
+++ b/tests/crypto/base_n_tests.cpp
@@ -1,7 +1,6 @@
 #include <boost/test/unit_test.hpp>
 
 #include <fc/crypto/hex.hpp>
-#include <fc/crypto/base36.hpp>
 #include <fc/crypto/base58.hpp>
 #include <fc/crypto/base64.hpp>
 #include <fc/exception/exception.hpp>
@@ -43,29 +42,6 @@ BOOST_AUTO_TEST_CASE(hex_test)
 }
 
 
-static void test_36( const std::string& test, const std::string& expected )
-{
-    std::vector<char> vec( test.begin(), test.end() );
-    std::string enc1 = fc::to_base36( vec );
-    std::string enc2 = fc::to_base36( test.c_str(), test.size() );
-    BOOST_CHECK_EQUAL( enc1, enc2 );
-    BOOST_CHECK_EQUAL( expected, enc2 );
-
-    std::vector<char> dec = fc::from_base36( enc1 );
-    BOOST_CHECK_EQUAL( vec.size(), dec.size() );
-    BOOST_CHECK( vec == dec );
-}
-
-BOOST_AUTO_TEST_CASE(base36_test)
-{
-    test_36( TEST1, "" );
-    test_36( TEST2, "01o35" );
-    test_36( TEST3, "l4ksdleyi5pnl0un5raue268ptj43dwjwmz15ie2" );
-    test_36( TEST4, "2rrrvpb7y4" );
-    test_36( TEST5, "000" );
-}
-
-
 static void test_58( const std::string& test, const std::string& expected )
 {
     std::vector<char> vec( test.begin(), test.end() );