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#include "zerocopy.h"
#include "output.h"
IZeroCopyInput::~IZeroCopyInput() = default;
size_t IZeroCopyInput::DoRead(void* buf, size_t len) {
const void* ptr;
size_t result = DoNext(&ptr, len);
if (result) {
memcpy(buf, ptr, result);
}
return result;
}
ui64 IZeroCopyInput::DoReadAll(IOutputStream& out) {
ui64 result = 0;
const void* ptr;
while (size_t len = Next(&ptr)) {
out.Write(ptr, len);
result += len;
}
return result;
}
size_t IZeroCopyInput::DoSkip(size_t len) {
const void* ptr;
return DoNext(&ptr, len);
}
IZeroCopyInputFastReadTo::~IZeroCopyInputFastReadTo() = default;
size_t IZeroCopyInputFastReadTo::DoReadTo(TString& st, char ch) {
const char* ptr;
size_t len = Next(&ptr);
if (!len) {
return 0;
}
size_t result = 0;
st.clear();
do {
if (const char* pos = (const char*)memchr(ptr, ch, len)) {
size_t bytesRead = (pos - ptr) + 1;
if (bytesRead > 1) {
st.append(ptr, pos);
}
Undo(len - bytesRead);
result += bytesRead;
return result;
} else {
result += len;
st.append(ptr, len);
}
len = Next(&ptr);
} while (len);
return result;
}
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