сравнить байты в памяти (compare bytes in memory)
Пролог (Prolog)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
Имя (Name)
memcmp — compare bytes in memory
Синопсис (Synopsis)
#include <string.h>
int memcmp(const void *s1, const void *s2, size_t n);
Описание (Description)
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
The memcmp() function shall compare the first n bytes (each
interpreted as unsigned char) of the object pointed to by s1 to
the first n bytes of the object pointed to by s2.
The sign of a non-zero return value shall be determined by the
sign of the difference between the values of the first pair of
bytes (both interpreted as type unsigned char) that differ in the
objects being compared.
Возвращаемое значение (Return value)
The memcmp() function shall return an integer greater than, equal
to, or less than 0, if the object pointed to by s1 is greater
than, equal to, or less than the object pointed to by s2,
respectively.
Ошибки (Error)
No errors are defined.
The following sections are informative.
Примеры (Examples)
None.
Использование в приложениях (Application usage)
None.
Обоснование (Rationale)
None.
Будущие направления (Future directions)
None.
Смотри также (See also)
The Base Definitions volume of POSIX.1‐2017, string.h(0p)
