f5d8dd201b
Fixed some sign comparison warnings. Added utility functions to fr::Packet's for: Getting read cursor position. Relative read cursor seeking. Asserting that data remains in the packet Getting the amount of data remaining Getting the size of the packet
47 lines
1.8 KiB
C++
47 lines
1.8 KiB
C++
//
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// Created by fred on 01/03/18.
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//
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#include "frnetlib/Base64.h"
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namespace fr
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{
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std::string Base64::encode(const std::string &input)
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{
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static const std::string base64_table = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
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std::string out;
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out.reserve(input.size() + (input.size() / 3) + 1);
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size_t a;
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//Do as many sets of 3 bytes as we can
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for(a = 0; a < input.size() - 2; a += 3)
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{
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out += base64_table[(input[a] >> 2) & 0x3F]; //Store the first 6 bits of the first byte
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out += base64_table[((input[a] & 0x3) << 4) | (input[a + 1] & 0xF0) >> 4]; //Store the last 2 bits of the first byte combined with the first 4 bits of the second byte
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out += base64_table[((input[a + 1] & 0xF) << 2) | (input[a + 2] & 0xC0) >> 6]; //Store the last 4 bits of the second byte combined with the first 2 bits of the third byte
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out += base64_table[input[a + 2] & 0x3F]; //Store the last 6 bits of the third byte
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}
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//Check if there's a remainder
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if(a < input.size())
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{
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out += base64_table[(input[a] >> 2) & 0x3F]; //Store first 6 bits of the first byte
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if(a == input.size() - 2) //There's 2 bytes left
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{
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out += base64_table[((input[a] & 0x3) << 4) | (input[a + 1] & 0xF0) >> 4]; //Store last 2 bits of first byte, and first 4 bits of second byte
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out += base64_table[(input[a + 1] & 0xF) << 2]; //Finally store the last 4 bits of the second byte
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out += "=";
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}
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else //There's 1 byte left
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{
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out += base64_table[(input[a] & 0x3) << 4]; //Store last 2 bits of first byte
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out += "==";
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}
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}
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return out;
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}
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}
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