2004-11-03 13:51:07 +00:00
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.\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
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.\" Distributed under GPL
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2009-03-10 09:09:21 +00:00
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.\" Heavily based on glibc infopages, copyright Free Software Foundation
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2004-11-03 13:51:07 +00:00
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.\"
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.\" aeb, 2003, polished a little
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2008-08-12 10:23:04 +00:00
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.TH MEMPCPY 3 2008-08-12 "GNU" "Linux Programmer's Manual"
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2004-11-03 13:51:07 +00:00
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.SH NAME
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mempcpy, wmempcpy \- copy memory area
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.SH SYNOPSIS
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.nf
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getresuid.2, mremap.2, poll.2, remap_file_pages.2, setresuid.2, splice.2, sync_file_range.2, syscall.2, tee.2, vmsplice.2, INFINITY.3, aio_init.3, asprintf.3, assert_perror.3, basename.3, bsd_signal.3, canonicalize_file_name.3, clog10.3, crypt.3, dl_iterate_phdr.3, dlopen.3, encrypt.3, exp10.3, fcloseall.3, fenv.3, fopencookie.3, ftw.3, getaddrinfo_a.3, getloadavg.3, getutent.3, grantpt.3, hsearch.3, lseek64.3, memmem.3, mempcpy.3, pow10.3, program_invocation_name.3, ptsname.3, putgrent.3, sched_getcpu.3, sincos.3, strchr.3, strfry.3, strnlen.3, strptime.3, strstr.3, strverscmp.3, swab.3, sysv_signal.3, tsearch.3, unlockpt.3, wcwidth.3: Add reference to feature_test_macros(7)
Some pages simply list feature test macro requirements in
the form:
#define #GNU_SOURCE
#include <someheader.h>
For these pages, add a "See feature_test_macros(7)" comment
on the "#define" line.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-10-31 04:31:47 +00:00
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.BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */"
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2004-11-03 13:51:07 +00:00
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.br
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.B #include <string.h>
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.sp
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.BI "void *mempcpy(void *" dest ", const void *" src ", size_t " n );
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.sp
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getresuid.2, mremap.2, poll.2, remap_file_pages.2, setresuid.2, splice.2, sync_file_range.2, syscall.2, tee.2, vmsplice.2, INFINITY.3, aio_init.3, asprintf.3, assert_perror.3, basename.3, bsd_signal.3, canonicalize_file_name.3, clog10.3, crypt.3, dl_iterate_phdr.3, dlopen.3, encrypt.3, exp10.3, fcloseall.3, fenv.3, fopencookie.3, ftw.3, getaddrinfo_a.3, getloadavg.3, getutent.3, grantpt.3, hsearch.3, lseek64.3, memmem.3, mempcpy.3, pow10.3, program_invocation_name.3, ptsname.3, putgrent.3, sched_getcpu.3, sincos.3, strchr.3, strfry.3, strnlen.3, strptime.3, strstr.3, strverscmp.3, swab.3, sysv_signal.3, tsearch.3, unlockpt.3, wcwidth.3: Add reference to feature_test_macros(7)
Some pages simply list feature test macro requirements in
the form:
#define #GNU_SOURCE
#include <someheader.h>
For these pages, add a "See feature_test_macros(7)" comment
on the "#define" line.
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
2010-10-31 04:31:47 +00:00
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.BR "#define _GNU_SOURCE" " /* See feature_test_macros(7) */"
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2004-11-03 13:51:07 +00:00
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.br
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.B #include <wchar.h>
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.sp
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.BI "wchar_t *wmempcpy(wchar_t *" dest ", const wchar_t *" src ", size_t " n );
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.fi
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.SH DESCRIPTION
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2007-04-12 22:42:49 +00:00
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The
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2005-10-19 07:07:02 +00:00
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.BR mempcpy ()
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2004-11-03 13:51:07 +00:00
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function is nearly identical to the
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2007-05-12 00:30:29 +00:00
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.BR memcpy (3)
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2007-04-12 22:42:49 +00:00
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function.
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It copies
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.I n
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2004-11-03 13:51:07 +00:00
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bytes from the object beginning at
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2007-04-12 22:42:49 +00:00
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.I src
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into the object pointed to by
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.IR dest .
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But instead of returning the value of
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2004-11-03 13:51:07 +00:00
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.I dest
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it returns a pointer to the byte following the last written byte.
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.PP
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This function is useful in situations where a number of objects
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shall be copied to consecutive memory positions.
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.PP
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The
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2005-10-19 07:07:02 +00:00
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.BR wmempcpy ()
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2005-06-22 07:19:03 +00:00
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function is identical but takes
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.I wchar_t
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type arguments and copies
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2004-11-03 13:51:07 +00:00
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.I n
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wide characters.
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.SH "RETURN VALUE"
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2007-07-09 21:43:01 +00:00
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\fIdest\fP + \fIn\fP.
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2008-08-11 20:10:18 +00:00
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.SH VERSIONS
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.BR mempcpy ()
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first appeared in glibc in version 2.1.
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2007-05-19 04:30:20 +00:00
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.SH "CONFORMING TO"
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This function is a GNU extension.
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2004-11-03 13:51:07 +00:00
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.SH "EXAMPLE"
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.nf
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void *
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combine(void *o1, size_t s1, void *o2, size_t s2)
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2007-04-05 14:17:54 +00:00
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{
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2007-06-13 22:02:09 +00:00
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void *result = malloc(s1 + s2);
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if (result != NULL)
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mempcpy(mempcpy(result, o1, s1), o2, s2);
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return result;
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2004-11-03 13:51:07 +00:00
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}
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.fi
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.SH "SEE ALSO"
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.BR memccpy (3),
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.BR memcpy (3),
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.BR memmove (3),
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2007-01-28 20:00:24 +00:00
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.BR wmemcpy (3),
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.BR feature_test_macros (7)
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