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make Base64EncodingBufferSize constexpr

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orignal
2025-03-16 17:21:22 -04:00
parent c0b5f2d2ef
commit 706b9c51b1
2 changed files with 27 additions and 32 deletions
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libi2pd/Base.cpp
+4 -23
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2023, The PurpleI2P Project
* Copyright (c) 2013-2025, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@@ -27,11 +27,6 @@ namespace data
{
return T32;
}
bool IsBase32 (char ch)
{
return (ch >= 'a' && ch <= 'z') || (ch >= '2' && ch <= '7');
}
static void iT64Build(void);
@@ -59,11 +54,6 @@ namespace data
{
return T64;
}
bool IsBase64 (char ch)
{
return (ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z') || (ch >= '0' && ch <= '9') || ch == '-' || ch == '~';
}
/*
* Reverse Substitution Table (built in run time)
@@ -234,21 +224,12 @@ namespace data
return outCount;
}
size_t Base64EncodingBufferSize (const size_t input_size)
{
auto d = div (input_size, 3);
if (d.rem)
d.quot++;
return 4 * d.quot;
}
std::string ToBase64Standard (const std::string& in)
std::string ToBase64Standard (std::string_view in)
{
auto len = Base64EncodingBufferSize (in.length ());
char * str = new char[len + 1];
auto l = ByteStreamToBase64 ((const uint8_t *)in.c_str (), in.length (), str, len);
auto l = ByteStreamToBase64 ((const uint8_t *)in.data (), in.length (), str, len);
str[l] = 0;
// replace '-' by '+' and '~' by '/'
for (size_t i = 0; i < l; i++)