[PATCH v5 1/2] lib: sbi: Add sbi_strnchr implementation

[Xiang W]

This commit add an implementation of sbi_strnchr

Signed-off-by: Xiang W <wxjstz at 126.com>
---
 include/sbi/sbi_string.h |  2 ++
 lib/sbi/sbi_string.c     | 10 ++++++++++
 2 files changed, 12 insertions(+)

diff --git a/include/sbi/sbi_string.h b/include/sbi/sbi_string.h
index b7c2bc2..6941382 100644
--- a/include/sbi/sbi_string.h
+++ b/include/sbi/sbi_string.h
@@ -31,6 +31,8 @@ char *sbi_strncpy(char *dest, const char *src, size_t count);
 
 char *sbi_strchr(const char *s, int c);
 
+char *sbi_strnchr(const char *s, int c, size_t count);
+
 char *sbi_strrchr(const char *s, int c);
 
 void *sbi_memset(void *s, int c, size_t count);
diff --git a/lib/sbi/sbi_string.c b/lib/sbi/sbi_string.c
index 9ebea69..82b8c7e 100644
--- a/lib/sbi/sbi_string.c
+++ b/lib/sbi/sbi_string.c
@@ -97,6 +97,16 @@ char *sbi_strchr(const char *s, int c)
 		return (char *)s;
 }
 
+char *sbi_strnchr(const char *s, int c, size_t count)
+{
+	while (count-- > 0) {
+		if (*s == (char)c)
+			return (char *)s;
+		s++;
+	}
+	return NULL;
+}
+
 char *sbi_strrchr(const char *s, int c)
 {
 	const char *last = s + sbi_strlen(s);
-- 
2.39.2