{
void *(CJSON_CDECL *allocate)(size_t size);
void (CJSON_CDECL *deallocate)(void *pointer);
- void *(CJSON_CDECL *reallocate)(void *pointer, size_t size);
+ void *(CJSON_CDECL *reallocate)(void *pointer, size_t new_size, size_t old_size);
} internal_hooks;
#if defined(_MSC_VER)
{
free(pointer);
}
-static void * CJSON_CDECL internal_realloc(void *pointer, size_t size)
-{
- return realloc(pointer, size);
-}
#else
#define internal_malloc malloc
#define internal_free free
-#define internal_realloc realloc
#endif
+static void * CJSON_CDECL internal_realloc(void *pointer, size_t new_size,
+ size_t old_size)
+{
+ return realloc(pointer, new_size);
+}
+
+static void *
+cjson_realloc_internal (void *ptr, size_t new_size, size_t old_size);
+
/* strlen of character literals resolved at compile time */
#define static_strlen(string_literal) (sizeof(string_literal) - sizeof(""))
/* Reset hooks */
global_hooks.allocate = malloc;
global_hooks.deallocate = free;
- global_hooks.reallocate = realloc;
+ global_hooks.reallocate = internal_realloc;
return;
}
global_hooks.reallocate = NULL;
if ((global_hooks.allocate == malloc) && (global_hooks.deallocate == free))
{
- global_hooks.reallocate = realloc;
+ global_hooks.reallocate = internal_realloc;
+ }
+ else
+ {
+ global_hooks.reallocate = cjson_realloc_internal;
}
}
internal_hooks hooks;
} printbuffer;
+static void *
+cjson_realloc_internal (void *ptr, size_t new_size, size_t old_size)
+{
+ size_t copy_size;
+ if (old_size < new_size)
+ copy_size = old_size;
+ else
+ copy_size = new_size;
+
+ unsigned char *newbuffer = global_hooks.allocate(new_size);
+ if (!newbuffer)
+ {
+ global_hooks.deallocate(ptr);
+ return NULL;
+ }
+
+ memcpy (newbuffer, ptr, copy_size);
+ global_hooks.deallocate (ptr);
+ return newbuffer;
+}
+
/* realloc printbuffer if necessary to have at least "needed" bytes more */
static unsigned char* ensure(printbuffer * const p, size_t needed)
{
newsize = needed * 2;
}
- if (p->hooks.reallocate != NULL)
+ newbuffer = p->hooks.reallocate (p->buffer, newsize, p->length);
+ if (newbuffer == NULL)
{
- /* reallocate with realloc if available */
- newbuffer = (unsigned char*)p->hooks.reallocate(p->buffer, newsize);
- if (newbuffer == NULL)
- {
- p->hooks.deallocate(p->buffer);
- p->length = 0;
- p->buffer = NULL;
-
- return NULL;
- }
- }
- else
- {
- /* otherwise reallocate manually */
- newbuffer = (unsigned char*)p->hooks.allocate(newsize);
- if (!newbuffer)
- {
- p->hooks.deallocate(p->buffer);
- p->length = 0;
- p->buffer = NULL;
-
- return NULL;
- }
-
- memcpy (newbuffer, p->buffer, p->offset + 1);
- p->hooks.deallocate (p->buffer);
+ p->hooks.deallocate(p->buffer);
+ p->length = 0;
+ p->buffer = NULL;
+ return NULL;
}
p->length = newsize;
p->buffer = newbuffer;
/* check if reallocate is available */
if (hooks->reallocate != NULL)
{
- printed = (unsigned char*) hooks->reallocate(buffer->buffer, buffer->offset + 1);
+ printed = (unsigned char*) hooks->reallocate(buffer->buffer, buffer->offset + 1, default_buffer_size);
if (printed == NULL) {
goto fail;
}
{
global_hooks.deallocate(object);
}
+
+CJSON_PUBLIC(void *) cJSON_realloc(void *object, size_t new_size, size_t old_size)
+{
+ return global_hooks.reallocate(object, new_size, old_size);
+}