DenysMedvid/pdf2htmlEX
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refince code: base64

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This commit is contained in:
Lu Wang 2012-11-29 19:38:57 +08:00
parent 56e59baeb2
commit ba77c1cc6c
2 changed files with 42 additions and 35 deletions
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40
src/util/base64.cc
View File

@ -2,6 +2,44 @@
namespace pdf2htmlEX {
using std::ostream;
ostream & base64stream::dumpto(ostream & out)
{
unsigned char buf[3];
while(in->read((char*)buf, 3))
{
out << base64_encoding[(buf[0] & 0xfc)>>2]
<< base64_encoding[((buf[0] & 0x03)<<4) | ((buf[1] & 0xf0)>>4)]
<< base64_encoding[((buf[1] & 0x0f)<<2) | ((buf[2] & 0xc0)>>6)]
<< base64_encoding[(buf[2] & 0x3f)];
}
auto cnt = in->gcount();
if(cnt > 0)
{
for(int i = cnt; i < 3; ++i)
buf[i] = 0;
out << base64_encoding[(buf[0] & 0xfc)>>2]
<< base64_encoding[((buf[0] & 0x03)<<4) | ((buf[1] & 0xf0)>>4)];
if(cnt > 1)
{
out << base64_encoding[(buf[1] & 0x0f)<<2];
}
else
{
out << '=';
}
out << '=';
}
return out;
}
const char * base64stream::base64_encoding = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
}
ostream & operator << (ostream & out, base64stream & bf) { return bf.dumpto(out); }
ostream & operator << (ostream & out, base64stream && bf) { return bf.dumpto(out); }
} //namespace pdf2htmlEX

37
src/util/base64.h
View File

@ -19,46 +19,15 @@ public:
base64stream(std::istream & in) : in(&in) { }
base64stream(std::istream && in) : in(&in) { }
std::ostream & dumpto(std::ostream & out)
{
unsigned char buf[3];
while(in->read((char*)buf, 3))
{
out << base64_encoding[(buf[0] & 0xfc)>>2]
<< base64_encoding[((buf[0] & 0x03)<<4) | ((buf[1] & 0xf0)>>4)]
<< base64_encoding[((buf[1] & 0x0f)<<2) | ((buf[2] & 0xc0)>>6)]
<< base64_encoding[(buf[2] & 0x3f)];
}
auto cnt = in->gcount();
if(cnt > 0)
{
for(int i = cnt; i < 3; ++i)
buf[i] = 0;
out << base64_encoding[(buf[0] & 0xfc)>>2]
<< base64_encoding[((buf[0] & 0x03)<<4) | ((buf[1] & 0xf0)>>4)];
if(cnt > 1)
{
out << base64_encoding[(buf[1] & 0x0f)<<2];
}
else
{
out << '=';
}
out << '=';
}
return out;
}
std::ostream & dumpto(std::ostream & out);
private:
std::istream * in;
static const char * base64_encoding;
};
static inline std::ostream & operator << (std::ostream & out, base64stream & bf) { return bf.dumpto(out); }
static inline std::ostream & operator << (std::ostream & out, base64stream && bf) { return bf.dumpto(out); }
std::ostream & operator << (std::ostream & out, base64stream & bf);
std::ostream & operator << (std::ostream & out, base64stream && bf);
} //namespace pdf2htmlEX
#endif //BASE64_H__