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-.TH LIBSIMPLE_MEMDUP 3 2018-10-27 libsimple
-.SH NAME
-libsimple_memdup \- duplicate bytes in memory
-.SH SYNOPSIS
-.nf
-#include <libsimple.h>
-
-void *libsimple_memdupa(const void *\fIs\fP, size_t \fIn\fP);
-void *libsimple_memdup(const void *\fIs\fP, size_t \fIn\fP);
-void *libsimple_enmemdup(int \fIstatus\fP, const void *\fIs\fP, size_t \fIn\fP);
-static inline void *libsimple_ememdup(const void *\fIs\fP, size_t \fIn\fP);
-
-#ifndef memdupa
-# define memdupa libsimple_memdupa
-#endif
-#ifndef memdup
-# define memdup libsimple_memdup
-#endif
-#ifndef enmemdup
-# define enmemdup libsimple_enmemdup
-#endif
-#ifndef ememdup
-# define ememdup libsimple_ememdup
-#endif
-.fi
-.PP
-Link with
-.IR \-lsimple .
-.SH DESCRIPTION
-The
-.BR libsimple_memdup ()
-function constructs allocates memory and copies
-.I n
-first bytes from
-.I s
-into the new allocation.
-.PP
-The
-.BR libsimple_enmemdup ()
-and
-.BR libsimple_ememdup ()
-functions are versions of the
-.BR libsimple_memdup ()
-function that call the
-.BR libsimple_enprintf (3)
-function on failure, causing the process to print
-an error message and exit. See
-.BR libsimple_enprintf (3)
-for more information.
-.PP
-The
-.BR libsimple_memdupa ()
-function is implemented as a macro and is a version
-of the
-.BR libsimple_memdup ()
-function that uses allocates the memory on the stack
-rather than on the heap, causing the return pointer
-to become invalid when the calling function returns.
-It is only available when compling with GCC or Clang.
-.SH RETURN VALUE
-Upon successful completion, the
-.BR libsimple_memdupa (),
-.BR libsimple_memdup (),
-.BR libsimple_enmemdup (),
-and
-.BR libsimple_ememdup ()
-functions return a non-null pointer, on failure the
-.BR libsimple_memdup ()
-function returns
-.B NULL
-and set
-.I errno
-to indicate the error, and the
-.BR libsimple_enmemdup (),
-and
-.BR libsimple_ememdup ()
-functions exit the process. The
-.BR libsimple_memdupa ()
-function cannot fail, however the kernel
-can kill the thread, and possibly the process, with a
-.B SIGSEGV
-signal if the memory cannot be allocated.
-.PP
-The returned pointer should be deallocated when it
-is no longer needed, except for the pointer returned
-by the
-.BR libsimple_memdupa ()
-function, it is automatically deallocated when the
-calling function returns.
-.SH ERRORS
-The
-.BR libsimple_memdup ()
-function may fail for any reason specified for the
-.BR alloc (3)
-function.
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lb lb lb
-l l l.
-Interface	Attribute	Value
-T{
-.BR libsimple_memdupa (),
-.br
-.BR libsimple_memdup (),
-.br
-.BR libsimple_enmemdup (),
-.br
-.BR libsimple_ememdup (),
-T}	Thread safety	MT-Safe
-T{
-.BR libsimple_memdupa (),
-.br
-.BR libsimple_memdup (),
-.br
-.BR libsimple_enmemdup (),
-.br
-.BR libsimple_ememdup (),
-T}	Async-signal safety	AS-Safe
-T{
-.BR libsimple_memdupa (),
-.br
-.BR libsimple_memdup (),
-.br
-.BR libsimple_enmemdup (),
-.br
-.BR libsimple_ememdup (),
-T}	Async-cancel safety	AC-Safe
-.TE
-.SH EXAMPLES
-None.
-.SH APPLICATION USAGE
-None.
-.SH RATIONALE
-None.
-.SH FUTURE DIRECTIONS
-None.
-.SH NOTES
-None.
-.SH BUGS
-None.
-.SH SEE ALSO
-.BR libsimple_aligned_memdup (3),
-.BR libsimple_enstrndup (3),
-.BR libsimple_enstrdup (3),
-.BR strndup (3),
-.BR strdup (3)