SDL_migration: add RW read/write

build-scripts/SDL_migration.cocci

@@ -31,6 +31,48 @@
 // So this file is a set of many semantic patches, mostly independant.
 
 
+// SDL_RWread
+@@
+expression e1, e2, e3, e4;
+identifier i;
+@@
+(
+   i = SDL_RWread(e1, e2,
+-  e3, e4);
++  e3 * e4);
++  i = (i <= 0) ? 0 : i / e3;
+|
+   SDL_RWread(e1, e2,
+-  e3, e4);
++  e3 * e4);
+|
++  /* FIXME MIGRATION: double-check if you use the returned value of SDL_RWread() */
+   SDL_RWread(e1, e2,
+-  e3, e4)
++  e3 * e4)
+
+)
+
+// SDL_RWwrite
+@@
+expression e1, e2, e3, e4;
+identifier i;
+@@
+(
+   i = SDL_RWwrite(e1, e2,
+-  e3, e4);
++  e3 * e4);
++  i = (i <= 0) ? 0 : i / e3;
+|
+   SDL_RWwrite(e1, e2,
+-  e3, e4);
++  e3 * e4);
+|
++  /* FIXME MIGRATION: double-check if you use the returned value of SDL_RWwrite() */
+   SDL_RWwrite(e1, e2,
+-  e3, e4)
++  e3 * e4)
+)
 
 // SDL_SIMDAlloc(), SDL_SIMDFree() have been removed.
 @@