CC78K4 datasheet(217/523 Pages) NEC

номер детали	CC78K4

подробное описание детали	CC78K4 Ver.2.30 or Later, C Compiler Language

PDF	523 Pages

Scroll/Zoom	100%

производитель	NEC [NEC]

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CHAPTER 10 LIBRARY FUNCTIONS

User’s Manual U15556EJ1V0UM

217

6-1

memcpy,

Character String/Memory Functions

memmove

FUNCTION

The memory function memcpy copies a specified number of characters from a source area of memory to a

destination area of memory.

The memory function memmove is identical to memcpy, except that it allows overlap between the source and

destination areas.

HEADER

string. h

FUNCTION PROTOTYPE

void *memcpy (void *s1, const void *s2, size_t n);

void *memmove (void *s1, const void *s2, size_t n);

Function

Arguments

Return Value

memcpy,

memmove

s1 ... Pointer to object into

which data is to be copied

s2 ... Pointer to object

containing data to be copied

n ... Number of characters to

be copied

Value of s1

EXPLANATION

memcpy

•

The memcpy function copies n number of consecutive bytes from the object pointed to by s2 to the object

pointed to by s1.

•

If s2 < s1 < s2+n (s1 and s2 overlap), the memory copy operation by memcpy is not guaranteed (because

copying starts in sequence from the beginning of the area).

memmove

•

The memmove function also copies n number of consecutive bytes from the object pointed to by s2 to the

object pointed to by s1.

•

Even if s1 and s2 overlap, the function performs memory copying properly.

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