/* Copyright (c) 2003-2018 Dovecot authors, see the included COPYING file */

#include "lib.h"

#include "read-full.h"

#include <unistd.h>

int read_full(int fd, void *data, size_t size)

{

  ssize_t ret;

  i_assert(size <= SSIZE_T_MAX);

  while (size > 0) {

    ret = read(fd, data, size);

    if (ret <= 0)

      return ret;

    data = PTR_OFFSET(data, ret);

    size -= ret;

  }

  return 1;

}

int pread_full(int fd, void *data, size_t size, off_t offset)

{

  ssize_t ret;

  i_assert(size <= SSIZE_T_MAX);

  while (size > 0) {

    ret = pread(fd, data, size, offset);

    if (ret <= 0)

      return ret;

    data = PTR_OFFSET(data, ret);

    size -= ret;

    offset += ret;

  }

  return 1;

}