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/*
* Pipe Reading/Writing
* (C) 1999-2007 Jack Lloyd
* 2012 Markus Wanner
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#include <botan/pipe.h>
#include <botan/filter.h>
#include <botan/internal/out_buf.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 uint8_t input[], size_t length)
{
if(!m_inside_msg)
throw Invalid_State("Cannot write to a Pipe while it is not processing");
m_pipe->write(input, length);
}
/*
* Write a string into a Pipe
*/
void Pipe::write(const std::string& str)
{
write(cast_char_ptr_to_uint8(str.data()), str.size());
}
/*
* Write a single byte into a Pipe
*/
void Pipe::write(uint8_t input)
{
write(&input, 1);
}
/*
* Write the contents of a DataSource into a Pipe
*/
void Pipe::write(DataSource& source)
{
secure_vector<uint8_t> buffer(BOTAN_DEFAULT_BUFFER_SIZE);
while(!source.end_of_data())
{
size_t got = source.read(buffer.data(), buffer.size());
write(buffer.data(), got);
}
}
/*
* Read some data from the pipe
*/
size_t Pipe::read(uint8_t output[], size_t length, message_id msg)
{
return m_outputs->read(output, length, get_message_no("read", msg));
}
/*
* Read some data from the pipe
*/
size_t Pipe::read(uint8_t output[], size_t length)
{
return read(output, length, DEFAULT_MESSAGE);
}
/*
* Read a single byte from the pipe
*/
size_t Pipe::read(uint8_t& out, message_id msg)
{
return read(&out, 1, msg);
}
/*
* Return all data in the pipe
*/
secure_vector<uint8_t> Pipe::read_all(message_id msg)
{
msg = ((msg != DEFAULT_MESSAGE) ? msg : default_msg());
secure_vector<uint8_t> buffer(remaining(msg));
size_t got = read(buffer.data(), buffer.size(), msg);
buffer.resize(got);
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());
secure_vector<uint8_t> buffer(BOTAN_DEFAULT_BUFFER_SIZE);
std::string str;
str.reserve(remaining(msg));
while(true)
{
size_t got = read(buffer.data(), buffer.size(), msg);
if(got == 0)
break;
str.append(cast_uint8_ptr_to_char(buffer.data()), got);
}
return str;
}
/*
* Find out how many bytes are ready to read
*/
size_t Pipe::remaining(message_id msg) const
{
return m_outputs->remaining(get_message_no("remaining", msg));
}
/*
* Peek at some data in the pipe
*/
size_t Pipe::peek(uint8_t output[], size_t length,
size_t offset, message_id msg) const
{
return m_outputs->peek(output, length, offset, get_message_no("peek", msg));
}
/*
* Peek at some data in the pipe
*/
size_t Pipe::peek(uint8_t output[], size_t length, size_t offset) const
{
return peek(output, length, offset, DEFAULT_MESSAGE);
}
/*
* Peek at a byte in the pipe
*/
size_t Pipe::peek(uint8_t& out, size_t offset, message_id msg) const
{
return peek(&out, 1, offset, msg);
}
size_t Pipe::get_bytes_read() const
{
return m_outputs->get_bytes_read(default_msg());
}
size_t Pipe::get_bytes_read(message_id msg) const
{
return m_outputs->get_bytes_read(msg);
}
bool Pipe::check_available(size_t n)
{
return (n <= remaining(default_msg()));
}
bool Pipe::check_available_msg(size_t n, message_id msg)
{
return (n <= remaining(msg));
}
}
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