memcpy()
Copy bytes from one buffer to another
Synopsis:
#include <string.h> void* memcpy( void* dst, const void* src, size_t length );
Arguments:
- dest
- A pointer to where you want the function to copy the data.
- src
- A pointer to the buffer that you want to copy data from.
- length
- The number of bytes to copy.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The memcpy() function copies length bytes from the buffer pointed to by src into the buffer pointed to by dst.
Copying overlapping buffers isn't guaranteed to work; use
memmove()
to
to copy buffers that overlap.
Returns:
A pointer to the destination buffer (that is, the value of dst).
Examples:
#include <stdio.h> #include <string.h> #include <stdlib.h> int main( void ) { char buffer[80]; memcpy( buffer, "Hello", 5 ); buffer[5] = '\0'; printf( "%s\n", buffer ); return EXIT_SUCCESS; }
Classification:
Safety: | |
---|---|
Cancellation point | No |
Interrupt handler | Yes |
Signal handler | Yes |
Thread | Yes |