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| author | Alexei Fedorov <Alexei.Fedorov@arm.com> | 2019-12-11 10:14:13 +0000 |
|---|---|---|
| committer | TrustedFirmware Code Review <review@review.trustedfirmware.org> | 2019-12-11 10:14:13 +0000 |
| commit | fcccd358e4cd6199c797ad127c77c47ec1ad5983 (patch) | |
| tree | 4806d68c350001c4980429f78a907e137e92642f /lib | |
| parent | 2bcaeab6639396c7b54db62a0fbb07798ab83a57 (diff) | |
| parent | ebff1072681c5ed09bb70d9c4f617476822db757 (diff) | |
| download | platform_external_arm-trusted-firmware-fcccd358e4cd6199c797ad127c77c47ec1ad5983.tar.gz platform_external_arm-trusted-firmware-fcccd358e4cd6199c797ad127c77c47ec1ad5983.tar.bz2 platform_external_arm-trusted-firmware-fcccd358e4cd6199c797ad127c77c47ec1ad5983.zip | |
Merge "libc: add memrchr" into integration
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libc/libc.mk | 1 | ||||
| -rw-r--r-- | lib/libc/memrchr.c | 24 |
2 files changed, 25 insertions, 0 deletions
diff --git a/lib/libc/libc.mk b/lib/libc/libc.mk index e1b5560f8..93d30d035 100644 --- a/lib/libc/libc.mk +++ b/lib/libc/libc.mk @@ -12,6 +12,7 @@ LIBC_SRCS := $(addprefix lib/libc/, \ memcmp.c \ memcpy.c \ memmove.c \ + memrchr.c \ memset.c \ printf.c \ putchar.c \ diff --git a/lib/libc/memrchr.c b/lib/libc/memrchr.c new file mode 100644 index 000000000..01caef3ae --- /dev/null +++ b/lib/libc/memrchr.c @@ -0,0 +1,24 @@ +/* + * Copyright (c) 2019, Arm Limited. All rights reserved. + * + * SPDX-License-Identifier: BSD-3-Clause + */ + +#include <string.h> + +#undef memrchr + +void *memrchr(const void *src, int c, size_t len) +{ + const unsigned char *s = src + (len - 1); + + while (len--) { + if (*s == (unsigned char)c) { + return (void*) s; + } + + s--; + } + + return NULL; +} |