swab(3) Library Functions Manual swab(3) NAME swab - swap adjacent bytes LIBRARY Standard C library (libc, -lc) SYNOPSIS #define _XOPEN_SOURCE /* See feature_test_macros(7) */ #include <unistd.h> void swab(const void from[restrict .n], void to[restrict .n], ssize_t n); DESCRIPTION The swab() function copies n bytes from the array pointed to by from to the array pointed to by to, exchanging adjacent even and odd bytes. This function is used to exchange data between machines that have dif- ferent low/high byte ordering. This function does nothing when n is negative. When n is positive and odd, it handles n-1 bytes as above, and does something unspecified with the last byte. (In other words, n should be even.) RETURN VALUE The swab() function returns no value. ATTRIBUTES For an explanation of the terms used in this section, see at- tributes(7). ┌────────────────────────────────────────────┬───────────────┬─────────┐ │Interface │ Attribute │ Value │ ├────────────────────────────────────────────┼───────────────┼─────────┤ │swab() │ Thread safety │ MT-Safe │ └────────────────────────────────────────────┴───────────────┴─────────┘ STANDARDS POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD. SEE ALSO bstring(3) Linux man-pages 6.03 2022-12-15 swab(3)
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