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Add memccpy(3).

This commit is contained in:
Jonas 'Sortie' Termansen 2012-11-08 18:52:49 +01:00
parent e80f765fbf
commit 0c54bcd6e9
3 changed files with 41 additions and 1 deletions
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1
libc/Makefile
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@ -83,6 +83,7 @@ integer.o \
localtime.o \
localtime_r.o \
mbtowc.o \
memccpy.o \
memchr.o \
memcmp.o \
memcpy.o \

2
libc/include/string.h
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@ -34,6 +34,7 @@ __BEGIN_DECLS
@include(size_t.h)
@include(locale_t.h)
void* memccpy(void* restrict, const void* restrict, int, size_t);
void* memchr(const void*, int, size_t);
int memcmp(const void*, const void*, size_t);
void* memcpy(void* restrict, const void* restrict, size_t);
@ -63,7 +64,6 @@ char* strtok_r(char* restrict, const char* restrict, char** restrict);
/* TODO: These are not implemented in sortix libc yet. */
#if defined(__SORTIX_SHOW_UNIMPLEMENTED)
void* memccpy(void* restrict, const void* restrict, int, size_t);
int strcoll_l(const char*, const char*, locale_t);
char* strerror_l(int, locale_t);
int strerror_r(int, char*, size_t);

39
libc/memccpy.cpp Normal file
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@ -0,0 +1,39 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
This file is part of the Sortix C Library.
The Sortix C Library is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
The Sortix C Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
memccpy.cpp
Copy memory until length is met or character is encountered.
*******************************************************************************/
#include <stddef.h>
#include <stdint.h>
#include <string.h>
extern "C" void* memccpy(void* destp, const void* srcp, int c, size_t n)
{
uint8_t* dest = (uint8_t*) destp;
const uint8_t* src = (const uint8_t*) srcp;
for ( size_t i = 0; i < n; i++ )
if ( src[i] == (uint8_t) c )
return dest + i;
else
dest[i] = src[i];
return NULL;
}