Datasheet

memcmp
memcpy
memmove
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MIKROELEKTRONIKA - SOFTWARE AND HARDWARE SOLUTIONS FOR EMBEDDED WORLD
Libraries
mikroBasic PRO for AVR
CHAPTER 6
Prototype
sub function memcmp(dim p1, p2 as ^byte, dim n as word) as integer
Description
The function returns a positive, negative, or zero value indicating the relation-
ship of first n words of memory areas starting at addresses p1 and p2.
This function compares two memory areas starting at addresses
p1 and p2 for n
words and returns a value indicating their relationship as follows:
Value Meaning
< 0 p1 "less than" p2
= 0 p1 "equal to" p2
> 0 p1 "greater than" p2
The value returned by the function is determined by the difference between the
values of the first pair of words that differ in the strings being compared.
For parameters
p1 and p2 you can use either a numerical value (literal/vari-
able/constant) indicating memory address or a dereferenced value of an object,
for example
@mystring or @PORTB.
Prototype
sub procedure memcpy(dim p1, p2 as ^byte, dim nn as word)
Description
The function copies nn words from the memory area starting at the address p2
to the memory area starting at p1. If these memory buffers overlap, the memcpy
function cannot guarantee that words are copied before being overwritten. If
these buffers do overlap, use the memmove function.
For parameters
p1 and p2 you can use either a numerical value (literal/vari-
able/constant) indicating memory address or a dereferenced value of an object,
for example
@mystring or @PORTB.
Prototype
sub procedure memmove(dim p1, p2, as ^byte, dim nn as word)
Description
The function copies nn words from the memory area starting at the address p2
to the memory area starting at p1. If these memory buffers overlap, the Memmove
function ensures that the words in p2 are copied to p1 before being overwritten.
For parameters
p1 and p2 you can use either a numerical value (literal/vari-
able/constant) indicating memory address or a dereferenced value of an object,
for example @mystring or @PORTB.