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a/src/utils/base64.cpp b/src/utils/base64.cpp
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bool base64_decode(const string& in, string& out)
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bool base64_decode(const string& in, string& out)
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{
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{
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    int io = 0, state = 0, ch = 0;
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    int io = 0, state = 0, ch = 0;
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    unsigned int ii = 0;
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    unsigned int ii = 0;
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    out.erase();
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    out.clear();
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    size_t ilen = in.length();
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    size_t ilen = in.length();
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    out.reserve(ilen);
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    out.reserve(ilen);
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    for (ii = 0; ii < ilen; ii++) {
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    for (ii = 0; ii < ilen; ii++) {
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    ch = (unsigned char)in[ii];
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    ch = (unsigned char)in[ii];
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void base64_encode(const string &in, string &out)
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void base64_encode(const string &in, string &out)
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{
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{
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    unsigned char input[3];
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    unsigned char input[3];
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    unsigned char output[4];
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    unsigned char output[4];
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    out.erase();
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    out.clear();
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    int srclength = in.length();
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    int srclength = in.length();
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    int sidx = 0;
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    int sidx = 0;
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    while (2 < srclength) {
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    while (2 < srclength) {
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    input[0] = in[sidx++];
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    input[0] = in[sidx++];