Merge pull request #5149 from mysterywolf/strnlen

fixed bug #5138

1 files changed, 25 insertions, 20 deletions

diff --git a/src/kservice.c b/src/kservice.c
index 41d81d8677..cc1dc6e22c 100644
--- a/src/kservice.c
+++ b/src/kservice.c
@@ -500,49 +500,54 @@ rt_int32_t rt_strcmp(const char *cs, const char *ct)
 RTM_EXPORT(rt_strcmp);
 
 /**
- * The  strnlen()  function  returns the number of characters in the
- * string pointed to by s, excluding the terminating null byte ('\0'),
- * but at most maxlen.  In doing this, strnlen() looks only at the
- * first maxlen characters in the string pointed to by s and never
- * beyond s+maxlen.
- *
- * @param  s is the string.
+ * This function will return the length of a string, which terminate will
+ * null character.
  *
- * @param  maxlen is the max size.
+ * @param  s is the string
  *
  * @return The length of string.
  */
-rt_size_t rt_strnlen(const char *s, rt_ubase_t maxlen)
+rt_size_t rt_strlen(const char *s)
 {
     const char *sc;
 
-    for (sc = s; *sc != '\0' && (rt_ubase_t)(sc - s) < maxlen; ++sc) /* nothing */
+    for (sc = s; *sc != '\0'; ++sc) /* nothing */
         ;
 
     return sc - s;
 }
-RTM_EXPORT(rt_strnlen);
+RTM_EXPORT(rt_strlen);
 
+#endif /* RT_KSERVICE_USING_STDLIB */
+
+#if !defined(RT_KSERVICE_USING_STDLIB) || defined(__ARMCC_VERSION)
 /**
- * This function will return the length of a string, which terminate will
- * null character.
+ * The  strnlen()  function  returns the number of characters in the
+ * string pointed to by s, excluding the terminating null byte ('\0'),
+ * but at most maxlen.  In doing this, strnlen() looks only at the
+ * first maxlen characters in the string pointed to by s and never
+ * beyond s+maxlen.
  *
- * @param  s is the string
+ * @param  s is the string.
+ *
+ * @param  maxlen is the max size.
  *
  * @return The length of string.
  */
-rt_size_t rt_strlen(const char *s)
+rt_size_t rt_strnlen(const char *s, rt_ubase_t maxlen)
 {
     const char *sc;
 
-    for (sc = s; *sc != '\0'; ++sc) /* nothing */
+    for (sc = s; *sc != '\0' && (rt_ubase_t)(sc - s) < maxlen; ++sc) /* nothing */
         ;
 
     return sc - s;
 }
-RTM_EXPORT(rt_strlen);
-
-#endif /* RT_KSERVICE_USING_STDLIB */
+RTM_EXPORT(rt_strnlen);
+#ifdef __ARMCC_VERSION
+size_t strnlen(const char *s, size_t maxlen) __attribute__((alias("rt_strnlen")));
+#endif /* __ARMCC_VERSION */
+#endif /* !defined(RT_KSERVICE_USING_STDLIB) || defined(__ARMCC_VERSION) */
 
 #ifdef RT_USING_HEAP
 /**
@@ -567,7 +572,7 @@ char *rt_strdup(const char *s)
 RTM_EXPORT(rt_strdup);
 #ifdef __ARMCC_VERSION
 char *strdup(const char *s) __attribute__((alias("rt_strdup")));
-#endif
+#endif /* __ARMCC_VERSION */
 #endif /* RT_USING_HEAP */
 
 /**