52 lines
1.9 KiB
C
52 lines
1.9 KiB
C
/*
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* FreeRTOS-Cellular-Interface v1.3.0
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* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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* https://www.FreeRTOS.org
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* https://github.com/FreeRTOS
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*/
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/**
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* @file strstr.c
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* @brief Creates a stub for strstr. This stub checks if, for the input copy
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* length, the destination and source are valid accessible memory.
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*/
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#include <string.h>
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char * strstr( const char * s1,
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const char * s2 )
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{
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size_t offset = nondet_size_t();
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__CPROVER_assert( __CPROVER_w_ok( s1, strlen( s1 ) ), "s1 write" );
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__CPROVER_assert( __CPROVER_r_ok( s1, strlen( s1 ) ), "s1 read" );
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__CPROVER_assert( __CPROVER_w_ok( s2, strlen( s2 ) ), "s2 write" );
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__CPROVER_assert( __CPROVER_r_ok( s2, strlen( s2 ) ), "s2 read" );
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if( ( offset >= 0 ) && ( offset < strlen( s1 ) ) )
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{
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return s1 + offset;
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}
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return NULL;
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}
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