1 /*############################################################################ 2 # Copyright 2017 Intel Corporation 3 # 4 # Licensed under the Apache License, Version 2.0 (the "License"); 5 # you may not use this file except in compliance with the License. 6 # You may obtain a copy of the License at 7 # 8 # http://www.apache.org/licenses/LICENSE-2.0 9 # 10 # Unless required by applicable law or agreed to in writing, software 11 # distributed under the License is distributed on an "AS IS" BASIS, 12 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 # See the License for the specific language governing permissions and 14 # limitations under the License. 15 ############################################################################*/ 16 /// Tiny portable implementations of standard library functions 17 /*! \file */ 18 19 #ifndef EPID_MEMBER_TINY_STDLIB_TINY_STDLIB_H_ 20 #define EPID_MEMBER_TINY_STDLIB_TINY_STDLIB_H_ 21 22 #include <stddef.h> 23 24 /// Fill block of memory 25 /*! 26 * Sets the first num bytes of the block of memory pointed by ptr 27 * to the specified value (interpreted as an unsigned char) 28 * 29 * \param ptr Pointer to the block of memory to fill. 30 * \param value Value to be set. The value is passed as an int, 31 * but the function fills the block of memory using the 32 * unsigned char conversion of this value. 33 * \param num Number of bytes to be set to the value. size_t is 34 * an unsigned integral type. 35 * \result ptr is returned. 36 */ 37 void* memset(void* ptr, int value, size_t num); 38 39 /// Compare two blocks of memory 40 /*! 41 * Compares the first num bytes of the block of memory pointed by 42 * ptr1 to the first num bytes pointed by ptr2, returning zero if 43 * they all match or a value different from zero representing which 44 * is greater if they do not. 45 * 46 * Notice that, unlike strcmp, the function does not stop comparing 47 * after finding a null character. 48 * 49 * \param ptr1 Pointer to block of memory. 50 * \param ptr2 Pointer to block of memory. 51 * \param num Number of bytes to compare. 52 * \result an integral value indicating the relationship between the 53 * content of the memory blocks: 54 * \retval <0 the first byte that does not match in both memory 55 * blocks has a lower value in ptr1 than in ptr2 (if 56 * evaluated as unsigned char values) 57 * \retval 0 the contents of both memory blocks are equal 58 * \retval >0 the first byte that does not match in both memory blocks 59 * has a greater value in ptr1 than in ptr2 (if evaluated 60 * as unsigned char values) 61 */ 62 int memcmp(const void* ptr1, const void* ptr2, size_t num); 63 64 #endif // EPID_MEMBER_TINY_STDLIB_TINY_STDLIB_H_ 65
