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Posted to commits@nuttx.apache.org by gu...@apache.org on 2021/11/26 18:24:41 UTC
[incubator-nuttx] branch master updated: libc/str:add strlcat to libc
This is an automated email from the ASF dual-hosted git repository.
gustavonihei pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git
The following commit(s) were added to refs/heads/master by this push:
new 80d32ed libc/str:add strlcat to libc
80d32ed is described below
commit 80d32edbe14af0064148e421dae8ba146698378d
Author: anjiahao <an...@xiaomi.com>
AuthorDate: Thu Nov 25 10:21:12 2021 +0800
libc/str:add strlcat to libc
Signed-off-by: anjiahao <an...@xiaomi.com>
---
include/string.h | 1 +
libs/libc/machine/Kconfig | 4 ++
libs/libc/string/Make.defs | 4 ++
libs/libc/string/lib_strlcat.c | 87 ++++++++++++++++++++++++++++++++++++++++++
4 files changed, 96 insertions(+)
diff --git a/include/string.h b/include/string.h
index 2b725a7..c7ff9d1 100644
--- a/include/string.h
+++ b/include/string.h
@@ -63,6 +63,7 @@ int strerror_r(int, FAR char *, size_t);
size_t strlen(FAR const char *);
size_t strnlen(FAR const char *, size_t);
FAR char *strcat(FAR char *, FAR const char *);
+size_t strlcat(FAR char *, FAR const char *, size_t);
FAR char *strncat(FAR char *, FAR const char *, size_t);
int strcmp(FAR const char *, FAR const char *);
int strncmp(FAR const char *, FAR const char *, size_t);
diff --git a/libs/libc/machine/Kconfig b/libs/libc/machine/Kconfig
index 304fbf0..4ab474e 100644
--- a/libs/libc/machine/Kconfig
+++ b/libs/libc/machine/Kconfig
@@ -80,6 +80,10 @@ config LIBC_ARCH_STRCPY
bool
default n
+config LIBC_ARCH_STRLCAT
+ bool
+ default n
+
config LIBC_ARCH_STRLCPY
bool
default n
diff --git a/libs/libc/string/Make.defs b/libs/libc/string/Make.defs
index 04b588a..aa23791 100644
--- a/libs/libc/string/Make.defs
+++ b/libs/libc/string/Make.defs
@@ -69,6 +69,10 @@ ifneq ($(CONFIG_LIBC_ARCH_STRCPY),y)
CSRCS += lib_strcpy.c
endif
+ifneq ($(CONFIG_LIBC_ARCH_STRLCAT),y)
+CSRCS += lib_strlcat.c
+endif
+
ifneq ($(CONFIG_LIBC_ARCH_STRLCPY),y)
CSRCS += lib_strlcpy.c
endif
diff --git a/libs/libc/string/lib_strlcat.c b/libs/libc/string/lib_strlcat.c
new file mode 100644
index 0000000..bc68885
--- /dev/null
+++ b/libs/libc/string/lib_strlcat.c
@@ -0,0 +1,87 @@
+/****************************************************************************
+ * libs/libc/string/lib_strlcat.c
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership. The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/types.h>
+#include <string.h>
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: strlcat
+ *
+ * Description:
+ * The strlcat() function appends at most (dstsize-strlen(dst)-1)
+ * characters of src to dst (dstsize being the size of the string buffer
+ * dst).
+ *
+ * Returned Value:
+ * Returns min{dstsize,strlen(dst)} + strlen(src).
+ *
+ ****************************************************************************/
+
+#ifndef CONFIG_LIBC_ARCH_STRLCAT
+size_t strlcat(FAR char *dst, FAR const char *src, size_t dsize)
+{
+ FAR const char *odst = dst;
+ FAR const char *osrc = src;
+ size_t n = dsize;
+ size_t dlen;
+
+ /* Find the end of dst and adjust bytes left but don't go past end. */
+
+ while (n-- != 0 && *dst != '\0')
+ {
+ dst++;
+ }
+
+ dlen = dst - odst;
+ n = dsize - dlen;
+
+ if (n-- == 0)
+ {
+ return dlen + strlen(src);
+ }
+
+ while (*src != '\0')
+ {
+ if (n != 0)
+ {
+ *dst++ = *src;
+ n--;
+ }
+
+ src++;
+ }
+
+ *dst = '\0';
+
+ /* Count does not include NUL */
+
+ return dlen + (src - osrc);
+}
+#endif