feat(stdlib): add lv_memmove (#4888)

Signed-off-by: Xu Xingliang <xuxingliang@xiaomi.com>

src/libs/lz4/lz4.h

@@ -46,10 +46,7 @@ extern "C" {
 #define LZ4_FREESTANDING    1
 #define LZ4_memset  lv_memset
 #define LZ4_memcpy  lv_memcpy
-#define LZ4_memmove memmove
-/**
- * @todo add LZ4_memmove
- */
+#define LZ4_memmove lv_memmove
 
 #ifndef LZ4_H_2983827168210
 #define LZ4_H_2983827168210

src/stdlib/builtin/lv_mem_core_builtin.c

@@ -260,4 +260,4 @@ static void lv_mem_walker(void * ptr, size_t size, int used, void * user)
             mon_p->free_biggest_size = size;
     }
 }
-#endif /*LV_USE_BUILTIN_MALLOC*/
+#endif /*LV_STDLIB_BUILTIN*/

src/stdlib/builtin/lv_sprintf_builtin.c

@@ -883,4 +883,4 @@ int lv_vsnprintf(char * buffer, size_t count, const char * format, va_list va)
     return _lv_vsnprintf(_out_buffer, buffer, count, format, va);
 }
 
-#endif /*LV_USE_BUILTIN_SNPRINTF*/
+#endif /*LV_STDLIB_BUILTIN*/

src/stdlib/builtin/lv_string_builtin.c

@@ -145,6 +145,22 @@ LV_ATTRIBUTE_FAST_MEM void lv_memset(void * dst, uint8_t v, size_t len)
     }
 }
 
+LV_ATTRIBUTE_FAST_MEM void * lv_memmove(void * dst, const void * src, size_t len)
+{
+    if(dst < src || (char *)dst > ((char *)src + len)) {
+        return lv_memcpy(dst, src, len);
+    }
+    else {
+        char * tmp = (char *)dst + len;
+        char * s = (char *) src + len;
+
+        while(len--) {
+            *--tmp = *--s;
+        }
+        return dst;
+    }
+}
+
 /* See https://en.cppreference.com/w/c/string/byte/strlen for reference */
 size_t lv_strlen(const char * str)
 {
@@ -194,4 +210,4 @@ char * lv_strdup(const char * src)
  *   STATIC FUNCTIONS
  **********************/
 
-#endif /*LV_USE_BUILTIN_MEMCPY*/
+#endif /*LV_STDLIB_BUILTIN*/

src/stdlib/builtin/lv_tlsf.c

@@ -1242,4 +1242,4 @@ void * lv_tlsf_realloc(lv_tlsf_t tlsf, void * ptr, size_t size)
     return p;
 }
 
-#endif /* LV_USE_BUILTIN_MALLOC */
+#endif /*LV_STDLIB_BUILTIN*/

src/stdlib/builtin/lv_tlsf.h

@@ -105,4 +105,4 @@ int lv_tlsf_check_pool(lv_pool_t pool);
 
 #endif /*LV_TLSF_H*/
 
-#endif /* LV_USE_BUILTIN_MALLOC */
+#endif /*LV_STDLIB_BUILTIN*/

src/stdlib/clib/lv_mem_core_clib.c

@@ -91,4 +91,4 @@ lv_result_t lv_mem_test_core(void)
  *   STATIC FUNCTIONS
  **********************/
 
-#endif /*LV_USE_BUILTIN_MALLOC*/
+#endif /*LV_STDLIB_CLIB*/

src/stdlib/clib/lv_string_clib.c

@@ -8,12 +8,9 @@
 #include "../../lv_conf_internal.h"
 #if LV_USE_STDLIB_STRING == LV_STDLIB_CLIB
 #include "../lv_string.h"
+#include "../lv_mem.h" /*Need lv_malloc*/
 #include <string.h>
 
-#if LV_USE_STDLIB_MALLOC == LV_STDLIB_BUILTIN
-    #include "../lv_mem.h"
-#endif
-
 /*********************
  *      DEFINES
  *********************/
@@ -48,6 +45,11 @@ LV_ATTRIBUTE_FAST_MEM void lv_memset(void * dst, uint8_t v, size_t len)
     memset(dst, v, len);
 }
 
+LV_ATTRIBUTE_FAST_MEM void * lv_memmove(void * dst, const void * src, size_t len)
+{
+    return memmove(dst, src, len);
+}
+
 size_t lv_strlen(const char * str)
 {
     return strlen(str);
@@ -92,4 +94,4 @@ char * lv_strdup(const char * src)
  *   STATIC FUNCTIONS
  **********************/
 
-#endif /*LV_USE_BUILTIN_MEMCPY*/
+#endif /*LV_STDLIB_CLIB*/

src/stdlib/lv_string.h

@@ -48,6 +48,15 @@ void * lv_memcpy(void * dst, const void * src, size_t len);
  */
 void lv_memset(void * dst, uint8_t v, size_t len);
 
+/**
+ * @brief Move a block of memory from source to destination
+ * @param dst Pointer to the destination array where the content is to be copied.
+ * @param src Pointer to the source of data to be copied.
+ * @param len Number of bytes to copy
+ * @return Pointer to the destination array.
+ */
+void * lv_memmove(void * dst, const void * src, size_t len);
+
 /**
  * Same as `memset(dst, 0x00, len)`.
  * @param dst pointer to the destination buffer

src/stdlib/micropython/lv_mem_core_micropython.c

@@ -92,4 +92,4 @@ lv_result_t lv_mem_test_core(void)
  *   STATIC FUNCTIONS
  **********************/
 
-#endif /*LV_USE_BUILTIN_MALLOC*/
+#endif /*LV_STDLIB_MICROPYTHON*/

src/stdlib/rtthread/lv_mem_core_rtthread.c

@@ -95,4 +95,4 @@ lv_result_t lv_mem_test_core(void)
  *   STATIC FUNCTIONS
  **********************/
 
-#endif /*LV_USE_STDLIB_MALLOC*/
+#endif /*LV_STDLIB_RTTHREAD*/

src/stdlib/rtthread/lv_sprintf_rtthread.c

@@ -58,4 +58,4 @@ int lv_vsnprintf(char * buffer, size_t count, const char * format, va_list va)
  *   STATIC FUNCTIONS
  **********************/
 
-#endif /*LV_USE_STDLIB_SPRINTF*/
+#endif /*LV_STDLIB_RTTHREAD*/

src/stdlib/rtthread/lv_string_rtthread.c

@@ -8,12 +8,9 @@
 #include "../../lv_conf_internal.h"
 #if LV_USE_STDLIB_STRING == LV_STDLIB_RTTHREAD
 #include "../lv_string.h"
+#include "../lv_mem.h" /*Need lv_malloc*/
 #include <rtthread.h>
 
-#if LV_USE_STDLIB_MALLOC == LV_STDLIB_BUILTIN
-    #include "../lv_mem.h"
-#endif
-
 /*********************
  *      DEFINES
  *********************/
@@ -48,6 +45,11 @@ LV_ATTRIBUTE_FAST_MEM void lv_memset(void * dst, uint8_t v, size_t len)
     rt_memset(dst, v, len);
 }
 
+LV_ATTRIBUTE_FAST_MEM void * lv_memmove(void * dst, const void * src, size_t len)
+{
+    return rt_memmove(dst, src, len);
+}
+
 size_t lv_strlen(const char * str)
 {
     return rt_strlen(str);
@@ -87,4 +89,4 @@ char * lv_strdup(const char * src)
  *   STATIC FUNCTIONS
  **********************/
 
-#endif /*LV_USE_STDLIB_STRING*/
+#endif /*LV_STDLIB_RTTHREAD*/