X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavutil%2Fmem.h;h=a03ba2f528b9a3f39996c4c8d7ed8a292130ca82;hb=bb65eb62991e5165b9fad2702a8954a1fe3c6f1f;hp=99dc4cc156283979399744fffb2d3a4017af7d10;hpb=b284e1ffe343d6697fb950d1ee517bafda8a9844;p=ffmpeg

diff --git a/libavutil/mem.h b/libavutil/mem.h
index 99dc4cc1562..a03ba2f528b 100644
--- a/libavutil/mem.h
+++ b/libavutil/mem.h
@@ -48,7 +48,7 @@
     #define DECLARE_ASM_CONST(n,t,v)                    \
         AV_PRAGMA(DATA_ALIGN(v,n))                      \
         static const t __attribute__((aligned(n))) v
-#elif defined(__GNUC__)
+#elif defined(__GNUC__) || defined(__clang__)
     #define DECLARE_ALIGNED(n,t,v)      t __attribute__ ((aligned (n))) v
     #define DECLARE_ASM_CONST(n,t,v)    static const t av_used __attribute__ ((aligned (n))) v
 #elif defined(_MSC_VER)
@@ -89,12 +89,7 @@ void *av_malloc(size_t size) av_malloc_attrib av_alloc_size(1);
  * be allocated.
  * @see av_malloc()
  */
-av_alloc_size(1, 2) static inline void *av_malloc_array(size_t nmemb, size_t size)
-{
-    if (!size || nmemb >= INT_MAX / size)
-        return NULL;
-    return av_malloc(nmemb * size);
-}
+av_alloc_size(1, 2) void *av_malloc_array(size_t nmemb, size_t size);
 
 /**
  * Allocate or reallocate a block of memory.
@@ -202,12 +197,7 @@ void *av_mallocz(size_t size) av_malloc_attrib av_alloc_size(1);
  * @see av_mallocz()
  * @see av_malloc_array()
  */
-av_alloc_size(1, 2) static inline void *av_mallocz_array(size_t nmemb, size_t size)
-{
-    if (!size || nmemb >= INT_MAX / size)
-        return NULL;
-    return av_mallocz(nmemb * size);
-}
+av_alloc_size(1, 2) void *av_mallocz_array(size_t nmemb, size_t size);
 
 /**
  * Duplicate the string s.
@@ -217,6 +207,16 @@ av_alloc_size(1, 2) static inline void *av_mallocz_array(size_t nmemb, size_t si
  */
 char *av_strdup(const char *s) av_malloc_attrib;
 
+/**
+ * Duplicate a substring of the string s.
+ * @param s string to be duplicated
+ * @param len the maximum length of the resulting string (not counting the
+ *            terminating byte).
+ * @return Pointer to a newly-allocated string containing a
+ * copy of s or NULL if the string cannot be allocated.
+ */
+char *av_strndup(const char *s, size_t len) av_malloc_attrib;
+
 /**
  * Free a memory block which has been allocated with av_malloc(z)() or
  * av_realloc() and set the pointer pointing to it to NULL.
@@ -237,6 +237,27 @@ void av_freep(void *ptr);
  */
 void av_memcpy_backptr(uint8_t *dst, int back, int cnt);
 
+/**
+ * Reallocate the given block if it is not large enough, otherwise do nothing.
+ *
+ * @see av_realloc
+ */
+void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size);
+
+/**
+ * Allocate a buffer, reusing the given one if large enough.
+ *
+ * Contrary to av_fast_realloc the current buffer contents might not be
+ * preserved and on error the old buffer is freed, thus no special
+ * handling to avoid memleaks is necessary.
+ *
+ * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer
+ * @param size size of the buffer *ptr points to
+ * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and
+ *                 *size 0 if an error occurred.
+ */
+void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size);
+
 /**
  * @}
  */