len0rd/rockbox
1
0
Fork 1
mirror of https://github.com/Rockbox/rockbox.git synced 2025-10-13 18:17:39 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

Add mempcpy implementation

Browse source 
A GNU extension that returns dst + size instead of dst. It's a nice
shortcut when copying strings with a known size or back-to-back blocks
and you have to do it often.

May of course be called directly or alternately through
__builtin_mempcpy in some compiler versions.

For ASM on native targets, it is implemented as an alternate entrypoint
to memcpy which adds minimal code and overhead.

Change-Id: I4cbb3483f6df3c1007247fe0a95fd7078737462b
This commit is contained in:
Michael Sevakis 2014-08-06 04:26:52 -04:00
parent 7d1a47cf13
commit 77b3625763
8 changed files with 99 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

1
firmware/libc/include/string.h
View file

@ -20,6 +20,7 @@ extern "C" {
_PTR _EXFUN(memchr,(const _PTR, int, size_t));
int _EXFUN(memcmp,(const _PTR, const _PTR, size_t));
_PTR _EXFUN(memcpy,(_PTR, const _PTR, size_t));
_PTR _EXFUN(mempcpy,(_PTR, const _PTR, size_t));
_PTR _EXFUN(memmove,(_PTR, const _PTR, size_t));
_PTR _EXFUN(memset,(_PTR, int, size_t));
char *_EXFUN(strcat,(char *, const char *));