mirror of
https://github.com/curl/curl.git
synced 2026-04-18 09:21:42 +03:00
cb2bcb681f
Add new functions in `curlx/warnless.h` for controlled type conversions: * curlx_uitouz, convert unsigned into to size_t (should always work) * curlx_uztoso, convert size_t to curl_off_t, capping at CURL_OFF_T_MAX * curlx_sztouz, convert ssize_t to size_t, return TRUE when ok * curlx_sotouz_range, convert curl_off_t to size_t interval, capping values to interval bounds Remove some unnecesary casts, convert some internal recv functions to the "return result, have size_t* arg" pattern. Closes #19495
327 lines
6.9 KiB
C
327 lines
6.9 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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* are also available at https://curl.se/docs/copyright.html.
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*
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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* furnished to do so, under the terms of the COPYING file.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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* SPDX-License-Identifier: curl
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*
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***************************************************************************/
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#include "warnless.h"
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#if defined(__INTEL_COMPILER) && defined(__unix__)
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#ifdef HAVE_ARPA_INET_H
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# include <arpa/inet.h>
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#endif
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#endif /* __INTEL_COMPILER && __unix__ */
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#include <limits.h>
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#define CURL_MASK_UCHAR ((unsigned char)~0)
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#define CURL_MASK_USHORT ((unsigned short)~0)
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#define CURL_MASK_UINT ((unsigned int)~0)
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#define CURL_MASK_SINT (CURL_MASK_UINT >> 1)
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#define CURL_MASK_ULONG ((unsigned long)~0)
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#define CURL_MASK_USIZE_T ((size_t)~0)
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#define CURL_MASK_SSIZE_T (CURL_MASK_USIZE_T >> 1)
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/*
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** unsigned long to unsigned char
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*/
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unsigned char curlx_ultouc(unsigned long ulnum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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DEBUGASSERT(ulnum <= (unsigned long) CURL_MASK_UCHAR);
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return (unsigned char)(ulnum & (unsigned long) CURL_MASK_UCHAR);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** unsigned size_t to signed int
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*/
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int curlx_uztosi(size_t uznum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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DEBUGASSERT(uznum <= (size_t) CURL_MASK_SINT);
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return (int)(uznum & (size_t) CURL_MASK_SINT);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** unsigned size_t to unsigned long
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*/
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unsigned long curlx_uztoul(size_t uznum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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#if ULONG_MAX < SIZE_MAX
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DEBUGASSERT(uznum <= (size_t) CURL_MASK_ULONG);
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#endif
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return (unsigned long)(uznum & (size_t) CURL_MASK_ULONG);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** unsigned size_t to unsigned int
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*/
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unsigned int curlx_uztoui(size_t uznum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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#if UINT_MAX < SIZE_MAX
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DEBUGASSERT(uznum <= (size_t) CURL_MASK_UINT);
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#endif
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return (unsigned int)(uznum & (size_t) CURL_MASK_UINT);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** signed long to signed int
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*/
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int curlx_sltosi(long slnum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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DEBUGASSERT(slnum >= 0);
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#if INT_MAX < LONG_MAX
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DEBUGASSERT((unsigned long) slnum <= (unsigned long) CURL_MASK_SINT);
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#endif
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return (int)(slnum & (long) CURL_MASK_SINT);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** signed long to unsigned int
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*/
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unsigned int curlx_sltoui(long slnum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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DEBUGASSERT(slnum >= 0);
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#if UINT_MAX < LONG_MAX
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DEBUGASSERT((unsigned long) slnum <= (unsigned long) CURL_MASK_UINT);
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#endif
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return (unsigned int)(slnum & (long) CURL_MASK_UINT);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** signed long to unsigned short
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*/
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unsigned short curlx_sltous(long slnum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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DEBUGASSERT(slnum >= 0);
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DEBUGASSERT((unsigned long) slnum <= (unsigned long) CURL_MASK_USHORT);
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return (unsigned short)(slnum & (long) CURL_MASK_USHORT);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** unsigned size_t to signed ssize_t
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*/
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ssize_t curlx_uztosz(size_t uznum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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DEBUGASSERT(uznum <= (size_t) CURL_MASK_SSIZE_T);
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return (ssize_t)(uznum & (size_t) CURL_MASK_SSIZE_T);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** signed curl_off_t to unsigned size_t
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*/
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size_t curlx_sotouz(curl_off_t sonum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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DEBUGASSERT(sonum >= 0);
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return (size_t)(sonum & (curl_off_t) CURL_MASK_USIZE_T);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** signed ssize_t to signed int
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*/
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int curlx_sztosi(ssize_t sznum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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DEBUGASSERT(sznum >= 0);
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#if INT_MAX < SSIZE_MAX
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DEBUGASSERT((size_t) sznum <= (size_t) CURL_MASK_SINT);
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#endif
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return (int)(sznum & (ssize_t) CURL_MASK_SINT);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** unsigned int to unsigned short
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*/
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unsigned short curlx_uitous(unsigned int uinum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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DEBUGASSERT(uinum <= (unsigned int) CURL_MASK_USHORT);
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return (unsigned short) (uinum & (unsigned int) CURL_MASK_USHORT);
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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/*
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** signed int to unsigned size_t
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*/
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size_t curlx_sitouz(int sinum)
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{
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#ifdef __INTEL_COMPILER
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# pragma warning(push)
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# pragma warning(disable:810) /* conversion may lose significant bits */
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#endif
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DEBUGASSERT(sinum >= 0);
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return (size_t) sinum;
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#ifdef __INTEL_COMPILER
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# pragma warning(pop)
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#endif
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}
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size_t curlx_uitouz(unsigned int uinum)
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{
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return (size_t)uinum;
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}
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size_t curlx_sotouz_range(curl_off_t sonum, size_t uzmin, size_t uzmax)
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{
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if(sonum < 0)
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return uzmin;
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#if SIZEOF_CURL_OFF_T > SIZEOF_SIZE_T
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if(sonum > SIZE_MAX)
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return uzmax;
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#endif
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return CURLMIN(CURLMAX((size_t)sonum, uzmin), uzmax);
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}
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bool curlx_sztouz(ssize_t sznum, size_t *puznum)
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{
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if(sznum < 0) {
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*puznum = 0;
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return FALSE;
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}
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*puznum = (size_t)sznum;
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return TRUE;
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}
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curl_off_t curlx_uztoso(size_t uznum)
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{
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#if SIZEOF_SIZE_T >= SIZEOF_CURL_OFF_T
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if(uznum > (size_t)CURL_OFF_T_MAX)
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return CURL_OFF_T_MAX;
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#endif
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return (curl_off_t)uznum;
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}
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