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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "input_reader.h"
#include "input.h"
namespace vespalib {
size_t
InputReader::obtain_slow()
{
_data = _input.evict(_pos).obtain();
_bytes_evicted += _pos;
_pos = 0;
if (_data.size == 0) {
_eof = true;
}
return size();
}
char
InputReader::read_slow()
{
if (!failed()) {
fail("input underflow");
}
return 0;
}
Memory
InputReader::read_slow(size_t bytes)
{
_space.clear();
while ((_space.size() < bytes) && (obtain() > 0)) {
size_t copy_now = std::min(size(), (bytes - _space.size()));
_space.insert(_space.end(), data(), data() + copy_now);
_pos += copy_now;
}
if (_space.size() == bytes) {
return Memory(&_space[0], _space.size());
}
if (!failed()) {
fail("input underflow");
}
return Memory();
}
InputReader::~InputReader()
{
_input.evict(_pos);
}
void
InputReader::fail(const vespalib::string &msg) {
if (!failed()) {
_error = msg;
_input.evict(_pos);
_data = Memory();
_bytes_evicted += _pos;
_pos = 0;
_eof = true;
}
}
} // namespace vespalib
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