xref: /third_party/curl/lib/warnless.c

/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at https://curl.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * SPDX-License-Identifier: curl
 *
 ***************************************************************************/

#include "curl_setup.h"

#if defined(__INTEL_COMPILER) && defined(__unix__)

#ifdef HAVE_NETINET_IN_H
#  include <netinet/in.h>
#endif
#ifdef HAVE_ARPA_INET_H
#  include <arpa/inet.h>
#endif

#endif /* __INTEL_COMPILER && __unix__ */

#include "warnless.h"

#ifdef _WIN32
#undef read
#undef write
#endif

#include <limits.h>

#define CURL_MASK_UCHAR   ((unsigned char)~0)
#define CURL_MASK_SCHAR   (CURL_MASK_UCHAR >> 1)

#define CURL_MASK_USHORT  ((unsigned short)~0)
#define CURL_MASK_SSHORT  (CURL_MASK_USHORT >> 1)

#define CURL_MASK_UINT    ((unsigned int)~0)
#define CURL_MASK_SINT    (CURL_MASK_UINT >> 1)

#define CURL_MASK_ULONG   ((unsigned long)~0)
#define CURL_MASK_SLONG   (CURL_MASK_ULONG >> 1)

#define CURL_MASK_UCOFFT  ((unsigned CURL_TYPEOF_CURL_OFF_T)~0)
#define CURL_MASK_SCOFFT  (CURL_MASK_UCOFFT >> 1)

#define CURL_MASK_USIZE_T ((size_t)~0)
#define CURL_MASK_SSIZE_T (CURL_MASK_USIZE_T >> 1)

/*
** unsigned long to unsigned short
*/

unsigned short curlx_ultous(unsigned long ulnum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(ulnum <= (unsigned long) CURL_MASK_USHORT);
  return (unsigned short)(ulnum & (unsigned long) CURL_MASK_USHORT);

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

/*
** unsigned long to unsigned char
*/

unsigned char curlx_ultouc(unsigned long ulnum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(ulnum <= (unsigned long) CURL_MASK_UCHAR);
  return (unsigned char)(ulnum & (unsigned long) CURL_MASK_UCHAR);

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

/*
** unsigned size_t to signed curl_off_t
*/

curl_off_t curlx_uztoso(size_t uznum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#elif defined(_MSC_VER)
#  pragma warning(push)
#  pragma warning(disable:4310) /* cast truncates constant value */
#endif

  DEBUGASSERT(uznum <= (size_t) CURL_MASK_SCOFFT);
  return (curl_off_t)(uznum & (size_t) CURL_MASK_SCOFFT);

#if defined(__INTEL_COMPILER) || defined(_MSC_VER)
#  pragma warning(pop)
#endif
}

/*
** unsigned size_t to signed int
*/

int curlx_uztosi(size_t uznum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(uznum <= (size_t) CURL_MASK_SINT);
  return (int)(uznum & (size_t) CURL_MASK_SINT);

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

/*
** unsigned size_t to unsigned long
*/

unsigned long curlx_uztoul(size_t uznum)
{
#ifdef __INTEL_COMPILER
# pragma warning(push)
# pragma warning(disable:810) /* conversion may lose significant bits */
#endif

#if ULONG_MAX < SIZE_T_MAX
  DEBUGASSERT(uznum <= (size_t) CURL_MASK_ULONG);
#endif
  return (unsigned long)(uznum & (size_t) CURL_MASK_ULONG);

#ifdef __INTEL_COMPILER
# pragma warning(pop)
#endif
}

/*
** unsigned size_t to unsigned int
*/

unsigned int curlx_uztoui(size_t uznum)
{
#ifdef __INTEL_COMPILER
# pragma warning(push)
# pragma warning(disable:810) /* conversion may lose significant bits */
#endif

#if UINT_MAX < SIZE_T_MAX
  DEBUGASSERT(uznum <= (size_t) CURL_MASK_UINT);
#endif
  return (unsigned int)(uznum & (size_t) CURL_MASK_UINT);

#ifdef __INTEL_COMPILER
# pragma warning(pop)
#endif
}

/*
** signed long to signed int
*/

int curlx_sltosi(long slnum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(slnum >= 0);
#if INT_MAX < LONG_MAX
  DEBUGASSERT((unsigned long) slnum <= (unsigned long) CURL_MASK_SINT);
#endif
  return (int)(slnum & (long) CURL_MASK_SINT);

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

/*
** signed long to unsigned int
*/

unsigned int curlx_sltoui(long slnum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(slnum >= 0);
#if UINT_MAX < LONG_MAX
  DEBUGASSERT((unsigned long) slnum <= (unsigned long) CURL_MASK_UINT);
#endif
  return (unsigned int)(slnum & (long) CURL_MASK_UINT);

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

/*
** signed long to unsigned short
*/

unsigned short curlx_sltous(long slnum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(slnum >= 0);
  DEBUGASSERT((unsigned long) slnum <= (unsigned long) CURL_MASK_USHORT);
  return (unsigned short)(slnum & (long) CURL_MASK_USHORT);

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

/*
** unsigned size_t to signed ssize_t
*/

ssize_t curlx_uztosz(size_t uznum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(uznum <= (size_t) CURL_MASK_SSIZE_T);
  return (ssize_t)(uznum & (size_t) CURL_MASK_SSIZE_T);

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

/*
** signed curl_off_t to unsigned size_t
*/

size_t curlx_sotouz(curl_off_t sonum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(sonum >= 0);
  return (size_t)(sonum & (curl_off_t) CURL_MASK_USIZE_T);

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

/*
** signed ssize_t to signed int
*/

int curlx_sztosi(ssize_t sznum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(sznum >= 0);
#if INT_MAX < SSIZE_T_MAX
  DEBUGASSERT((size_t) sznum <= (size_t) CURL_MASK_SINT);
#endif
  return (int)(sznum & (ssize_t) CURL_MASK_SINT);

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

/*
** unsigned int to unsigned short
*/

unsigned short curlx_uitous(unsigned int uinum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(uinum <= (unsigned int) CURL_MASK_USHORT);
  return (unsigned short) (uinum & (unsigned int) CURL_MASK_USHORT);

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

/*
** signed int to unsigned size_t
*/

size_t curlx_sitouz(int sinum)
{
#ifdef __INTEL_COMPILER
#  pragma warning(push)
#  pragma warning(disable:810) /* conversion may lose significant bits */
#endif

  DEBUGASSERT(sinum >= 0);
  return (size_t) sinum;

#ifdef __INTEL_COMPILER
#  pragma warning(pop)
#endif
}

#ifdef USE_WINSOCK

/*
** curl_socket_t to signed int
*/

int curlx_sktosi(curl_socket_t s)
{
  return (int)((ssize_t) s);
}

/*
** signed int to curl_socket_t
*/

curl_socket_t curlx_sitosk(int i)
{
  return (curl_socket_t)((ssize_t) i);
}

#endif /* USE_WINSOCK */

#if defined(_WIN32)

ssize_t curlx_read(int fd, void *buf, size_t count)
{
  return (ssize_t)read(fd, buf, curlx_uztoui(count));
}

ssize_t curlx_write(int fd, const void *buf, size_t count)
{
  return (ssize_t)write(fd, buf, curlx_uztoui(count));
}

#endif /* _WIN32 */

/* Ensure that warnless.h redefinitions continue to have an effect
   in "unity" builds. */
#undef HEADER_CURL_WARNLESS_H_REDEFS