feat(stdlib):add rtthread function to stdlib (#4777)

1 files changed, 85 insertions, 0 deletions

diff --git a/src/stdlib/rtthread/lv_string_rtthread.c b/src/stdlib/rtthread/lv_string_rtthread.c
new file mode 100644
index 000000000..8b23922ab
--- /dev/null
+++ b/src/stdlib/rtthread/lv_string_rtthread.c
@@ -0,0 +1,85 @@
+/**
+ * @file lv_string_rtthread.c
+ */
+
+/*********************
+ *      INCLUDES
+ *********************/
+#include "../../lv_conf_internal.h"
+#if LV_USE_STDLIB_STRING == LV_STDLIB_RTTHREAD
+#include "../lv_string.h"
+#include <rtthread.h>
+
+#if LV_USE_STDLIB_MALLOC == LV_STDLIB_BUILTIN
+    #include "../lv_mem.h"
+#endif
+
+/*********************
+ *      DEFINES
+ *********************/
+
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+/**********************
+ *  STATIC PROTOTYPES
+ **********************/
+
+/**********************
+ *  STATIC VARIABLES
+ **********************/
+
+/**********************
+ *      MACROS
+ **********************/
+
+/**********************
+ *   GLOBAL FUNCTIONS
+ **********************/
+
+LV_ATTRIBUTE_FAST_MEM void * lv_memcpy(void * dst, const void * src, size_t len)
+{
+    return rt_memcpy(dst, src, len);
+}
+
+LV_ATTRIBUTE_FAST_MEM void lv_memset(void * dst, uint8_t v, size_t len)
+{
+    rt_memset(dst, v, len);
+}
+
+size_t lv_strlen(const char * str)
+{
+    return rt_strlen(str);
+}
+
+char * lv_strncpy(char * dst, const char * src, size_t dest_size)
+{
+    return rt_strncpy(dst, src, dest_size);
+}
+
+char * lv_strcpy(char * dst, const char * src)
+{
+    return rt_strcpy(dst, src);
+}
+
+char * lv_strdup(const char * src)
+{
+    /*strdup uses malloc, so use the built in malloc if it's enabled */
+#if LV_USE_STDLIB_MALLOC == LV_STDLIB_BUILTIN
+    size_t len = lv_strlen(src) + 1;
+    char * dst = lv_malloc(len);
+    if(dst == NULL) return NULL;
+
+    lv_memcpy(dst, src, len); /*do memcpy is faster than strncpy when length is known*/
+    return dst;
+#else
+    return rt_strdup(src);
+#endif
+}
+
+/**********************
+ *   STATIC FUNCTIONS
+ **********************/
+
+#endif /*LV_USE_STDLIB_STRING*/