#include "common.hh"

#include "io.hh"

#include <errno.h>
#include <unistd.h>

namespace io {

bool read_all(int fd, std::string* out) {
  char buf[32768];
  while (true) {
    auto ret = read(fd, buf, sizeof(buf));
    if (ret == 0)
      return true;
    if (ret < 0) {
      if (errno == EINTR)
        continue;
      return false;
    }
    out->append(buf, ret);
  }
}

bool write_all(int fd, std::string const& in) {
  size_t offset = 0;
  while (offset < in.size()) {
    auto ret = write(fd, in.data() + offset, in.size() - offset);
    if (ret == 0)
      return false;
    if (ret < 0) {
      if (errno == EINTR)
        continue;
      return false;
    }
    offset += ret;
  }
  return true;
}

}  // namespace io