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/*
* Pipe Reading/Writing
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/pipe.h>
#include <botan/out_buf.h>
#include <botan/secqueue.h>
namespace Botan {
/*
* Look up the canonical ID for a queue
*/
Pipe::message_id Pipe::get_message_no(const std::string& func_name,
message_id msg) const
{
if(msg == DEFAULT_MESSAGE)
msg = default_msg();
else if(msg == LAST_MESSAGE)
msg = message_count() - 1;
if(msg >= message_count())
throw Invalid_Message_Number(func_name, msg);
return msg;
}
/*
* Write into a Pipe
*/
void Pipe::write(const byte input[], u32bit length)
{
if(!inside_msg)
throw Exception("Cannot write to a Pipe while it is not processing");
pipe->write(input, length);
}
/*
* Write into a Pipe
*/
void Pipe::write(const MemoryRegion<byte>& input)
{
write(input.begin(), input.size());
}
/*
* Write a string into a Pipe
*/
void Pipe::write(const std::string& str)
{
write(reinterpret_cast<const byte*>(str.data()), str.size());
}
/*
* Write a single byte into a Pipe
*/
void Pipe::write(byte input)
{
write(&input, 1);
}
/*
* Write the contents of a DataSource into a Pipe
*/
void Pipe::write(DataSource& source)
{
SecureVector<byte> buffer(DEFAULT_BUFFERSIZE);
while(!source.end_of_data())
{
u32bit got = source.read(buffer, buffer.size());
write(buffer, got);
}
}
/*
* Read some data from the pipe
*/
u32bit Pipe::read(byte output[], u32bit length, message_id msg)
{
return outputs->read(output, length, get_message_no("read", msg));
}
/*
* Read some data from the pipe
*/
u32bit Pipe::read(byte output[], u32bit length)
{
return read(output, length, DEFAULT_MESSAGE);
}
/*
* Read a single byte from the pipe
*/
u32bit Pipe::read(byte& out, message_id msg)
{
return read(&out, 1, msg);
}
/*
* Return all data in the pipe
*/
SecureVector<byte> Pipe::read_all(message_id msg)
{
msg = ((msg != DEFAULT_MESSAGE) ? msg : default_msg());
SecureVector<byte> buffer(remaining(msg));
read(buffer, buffer.size(), msg);
return buffer;
}
/*
* Return all data in the pipe as a string
*/
std::string Pipe::read_all_as_string(message_id msg)
{
msg = ((msg != DEFAULT_MESSAGE) ? msg : default_msg());
SecureVector<byte> buffer(DEFAULT_BUFFERSIZE);
std::string str;
str.reserve(remaining(msg));
while(true)
{
u32bit got = read(buffer, buffer.size(), msg);
if(got == 0)
break;
str.append(reinterpret_cast<const char*>(buffer.begin()), got);
}
return str;
}
/*
* Find out how many bytes are ready to read
*/
u32bit Pipe::remaining(message_id msg) const
{
return outputs->remaining(get_message_no("remaining", msg));
}
/*
* Peek at some data in the pipe
*/
u32bit Pipe::peek(byte output[], u32bit length,
u32bit offset, message_id msg) const
{
return outputs->peek(output, length, offset, get_message_no("peek", msg));
}
/*
* Peek at some data in the pipe
*/
u32bit Pipe::peek(byte output[], u32bit length, u32bit offset) const
{
return peek(output, length, offset, DEFAULT_MESSAGE);
}
/*
* Peek at a byte in the pipe
*/
u32bit Pipe::peek(byte& out, u32bit offset, message_id msg) const
{
return peek(&out, 1, offset, msg);
}
}
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