49 lines
1.4 KiB
C++
49 lines
1.4 KiB
C++
#include <fc/crypto/hex.hpp>
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#include <fc/exception/exception.hpp>
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namespace fc {
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uint8_t from_hex( char c ) {
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if( c >= '0' && c <= '9' )
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return c - '0';
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if( c >= 'a' && c <= 'f' )
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return c - 'a' + 10;
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if( c >= 'A' && c <= 'F' )
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return c - 'A' + 10;
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FC_THROW_EXCEPTION( exception, "Invalid hex character '${c}'", ("c", std::string(&c,1) ) );
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return 0;
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}
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std::string to_hex( const char* d, uint32_t s )
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{
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std::string r;
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const char* to_hex="0123456789abcdef";
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uint8_t* c = (uint8_t*)d;
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for( uint32_t i = 0; i < s; ++i )
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(r += to_hex[(c[i]>>4)]) += to_hex[(c[i] &0x0f)];
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return r;
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}
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size_t from_hex( const std::string& hex_str, char* out_data, size_t out_data_len ) {
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std::string::const_iterator i = hex_str.begin();
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uint8_t* out_pos = (uint8_t*)out_data;
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uint8_t* out_end = out_pos + out_data_len;
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while( i != hex_str.end() && out_end != out_pos ) {
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*out_pos = from_hex( *i ) << 4;
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++i;
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if( i != hex_str.end() ) {
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*out_pos |= from_hex( *i );
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++i;
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}
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++out_pos;
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}
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return out_pos - (uint8_t*)out_data;
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}
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std::string to_hex( const std::vector<char>& data )
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{
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if( data.size() )
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return to_hex( data.data(), data.size() );
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return "";
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}
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}
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