mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2026-08-26 18:46:03 +08:00
Prashant Rahul
97e4174c62
libc's strto* functions' behaviour isn't defined when the passed string is NULL. In glibc it causes a seg fault when I tested it. This could cause inconsistency. rtem's stringto* functions didnt previously checked for null before passing to underlying strto* functions. Added the check which returns `RTEMS_INVALID_ADDRESS` on failure. Also added a test case for the same Signed-off-by: Prashant Rahul <prashantrahul141@protonmail.com>
150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Copyright (c) 2009 On-Line Applications Research Corporation (OAR).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <errno.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <stdlib.h>
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#include <math.h>
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#include <rtems/rtems/status.h>
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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/*
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* This file is designed to be included multiple times to instantiate
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* it and should NOT be protected against multiple inclusions.
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*/
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#if !defined( STRING_TO_FLOAT ) && !defined( STRING_TO_INTEGER )
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#error "Neither STRING_TO_FLOAT nor STRING_TO_INTEGER defined"
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#endif
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#if defined( STRING_TO_FLOAT ) && defined( STRING_TO_INTEGER )
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#error "Both STRING_TO_FLOAT nor STRING_TO_INTEGER defined"
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#endif
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#ifndef STRING_TO_TYPE
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#error "STRING_TO_TYPE not defined"
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#endif
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#ifndef STRING_TO_NAME
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#error "STRING_TO_NAME not defined"
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#endif
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#ifndef STRING_TO_METHOD
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#error "STRING_TO_METHOD not defined"
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#endif
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#ifndef STRING_TO_MAX
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#error "STRING_TO_MAX not defined"
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#endif
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#undef ZERO
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#ifdef STRING_TO_FLOAT
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#define ZERO 0.0
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#elif defined( STRING_TO_INTEGER )
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#define ZERO 0
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#endif
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rtems_status_code STRING_TO_NAME(
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const char *s,
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STRING_TO_TYPE *n,
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char **endptr
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#if defined( STRING_TO_INTEGER )
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,
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int base
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#endif
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)
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{
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#ifdef STRING_TO_RESULT_TYPE
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STRING_TO_RESULT_TYPE result;
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#else
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STRING_TO_TYPE result;
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#endif
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char *end;
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if ( NULL == s ) {
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return RTEMS_INVALID_ADDRESS;
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}
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if ( NULL == n ) {
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return RTEMS_INVALID_ADDRESS;
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}
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errno = 0;
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*n = 0;
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#ifdef STRING_TO_FLOAT
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result = STRING_TO_METHOD( s, &end );
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#elif defined( STRING_TO_INTEGER )
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result = STRING_TO_METHOD( s, &end, base );
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#endif
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/* If the user wants the end pointer back, then return it. */
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if ( endptr ) {
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*endptr = end;
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}
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/* nothing was converted */
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if ( end == s ) {
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return RTEMS_NOT_DEFINED;
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}
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/* there was a conversion error */
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if ( ( result == ZERO ) && errno ) {
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return RTEMS_INVALID_NUMBER;
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}
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#ifdef STRING_TO_MAX
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/* there was an overflow */
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if ( ( result == STRING_TO_MAX ) && ( errno == ERANGE ) ) {
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return RTEMS_INVALID_NUMBER;
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}
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#endif
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#ifdef STRING_TO_MIN
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/* there was an underflow */
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if ( ( result == STRING_TO_MIN ) && ( errno == ERANGE ) ) {
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return RTEMS_INVALID_NUMBER;
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}
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#endif
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#ifdef STRING_TO_UCHAR_MAX
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/* special case for uchar */
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if ( result > STRING_TO_UCHAR_MAX ) {
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errno = ERANGE;
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return RTEMS_INVALID_NUMBER;
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}
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#endif
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*n = result;
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return RTEMS_SUCCESSFUL;
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}
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