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memcmp

NEAR SYNTAX: int _n_memcmp( void *s1, void *s2, size_t n );

FAR SYNTAX: int _f_memcmp( void far *s1, void far *s2, size_t n );

NOTE	By default, memcmp() is defined to _n_memcmp().

Description

Performs unsigned character by character comparison of two memory blocks of length n.

For Rabbit 4000+ users, this function supports FAR pointers. By default the near version of the function is called. The macro USE_FAR_STRING will change all calls to functions in this library to their far versions. The user may also explicitly call the far version with _f_strfunc where strfunc is the name of the string function.

Because FAR addresses are larger, the far versions of this function will run slightly slower than the near version. To explicitly call the near version when the USE_FAR_STRING macro is defined and all pointers are near pointers, append _n_ to the function name, e.g., _n_strfunc. For more information about FAR pointers, see the Dynamic C User's Manual or the samples in Samples/Rabbit4000/FAR/.

Parameters

s1

Pointer to block 1.

s2

Pointer to block 2.

n

Maximum number of bytes to compare.

Return value

<0: A character in str1 is less than the corresponding character in str2.
 0: str1 is identical to str2.
>0: A character in str1 is greater than the corresponding character in str2.

Library

STRING.LIB

See also

strncmp