LCOV - code coverage report
Current view: top level - libc/string - memmove.c (source / functions) Hit Total Coverage
Test: skiboot.info Lines: 8 8 100.0 %
Date: 2024-01-02 21:04:04 Functions: 1 1 100.0 %
Branches: 0 0 -

           Branch data     Line data    Source code
       1                 :            : /******************************************************************************
       2                 :            :  * Copyright (c) 2004, 2008 IBM Corporation
       3                 :            :  * All rights reserved.
       4                 :            :  * This program and the accompanying materials
       5                 :            :  * are made available under the terms of the BSD License
       6                 :            :  * which accompanies this distribution, and is available at
       7                 :            :  * http://www.opensource.org/licenses/bsd-license.php
       8                 :            :  *
       9                 :            :  * Contributors:
      10                 :            :  *     IBM Corporation - initial implementation
      11                 :            :  *****************************************************************************/
      12                 :            : 
      13                 :            : #include <stddef.h>
      14                 :            : 
      15                 :            : void *memcpy(void *dest, const void *src, size_t n);
      16                 :            : void *memmove(void *dest, const void *src, size_t n);
      17                 :         15 : void *memmove(void *dest, const void *src, size_t n)
      18                 :            : {
      19                 :            :         /* Do the buffers overlap in a bad way? */
      20                 :         15 :         if (src < dest && src + n >= dest) {
      21                 :            :                 char *cdest;
      22                 :            :                 const char *csrc;
      23                 :            :                 int i;
      24                 :            : 
      25                 :            :                 /* Copy from end to start */
      26                 :          5 :                 cdest = dest + n - 1;
      27                 :          5 :                 csrc = src + n - 1;
      28                 :         55 :                 for (i = 0; i < n; i++) {
      29                 :         50 :                         *cdest-- = *csrc--;
      30                 :            :                 }
      31                 :          5 :                 return dest;
      32                 :            :         } else {
      33                 :            :                 /* Normal copy is possible */
      34                 :         10 :                 return memcpy(dest, src, n);
      35                 :            :         }
      36                 :            : }

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