clean up cfile

 - replace a lot of platform specific code with SDL filesystem functions
 - remove support for memory-mapped files (not actually used)
 - only do special case-sensitive filesystem handling if required
 - support case-sensitive roots on Windows

Author: notimaginative

code/anim/animplay.cpp

@@ -667,12 +667,11 @@ void anim_read_header(anim *ptr, CFILE *fp)
  * 
  * @param real_filename Filename of animation
  * @param cf_dir_type 
- * @param file_mapped Whether to use memory-mapped file or not.
  * 
  * @details Memory-mapped files will page in the animation from disk as it is needed, but performance is not as good.
  * @return Pointer to anim that is loaded if success, NULL if failure.
  */
-anim *anim_load(const char *real_filename, int cf_dir_type, int file_mapped)
+anim *anim_load(const char *real_filename, int cf_dir_type)
 {
 	anim			*ptr;
 	CFILE			*fp;
@@ -697,7 +696,7 @@ anim *anim_load(const char *real_filename, int cf_dir_type, int file_mapped)
 	}
 
 	if (!ptr) {
-		fp = cfopen(name, "rb", CFILE_NORMAL, cf_dir_type);
+		fp = cfopen(name, "rb", cf_dir_type);
 		if ( !fp )
 			return NULL;
 
@@ -743,18 +742,9 @@ anim *anim_load(const char *real_filename, int cf_dir_type, int file_mapped)
 
 		ptr->cfile_ptr = NULL;
 
-		if ( file_mapped == PAGE_FROM_MEM) {
-			// Try mapping the file to memory 
-			ptr->flags |= ANF_MEM_MAPPED;
-			ptr->cfile_ptr = cfopen(name, "rb", CFILE_MEMORY_MAPPED, cf_dir_type);
-		}
-
-		// couldn't memory-map file... must be in a packfile, so stream manually
-		if ( file_mapped == PAGE_FROM_MEM && !ptr->cfile_ptr ) {
-			ptr->flags &= ~ANF_MEM_MAPPED;
-			ptr->flags |= ANF_STREAMED;
-			ptr->cfile_ptr = cfopen(name, "rb", CFILE_NORMAL, cf_dir_type);
-		}
+		// NOTE: mapped files no longer supported!!
+		ptr->flags |= ANF_STREAMED;
+		ptr->cfile_ptr = cfopen(name, "rb", cf_dir_type);
 
 		ptr->cache = NULL;
 

code/anim/animplay.h

@@ -38,12 +38,6 @@ typedef struct {
 	int ping_pong;
 } anim_play_struct;
 
-enum
-{
-	PAGE_FROM_DISK		  = 0,
-	PAGE_FROM_MEM		  = 1
-};
-
 extern int Anim_paused;
 
 void				anim_init();
@@ -57,7 +51,7 @@ void				anim_ignore_next_frametime();
 int				anim_show_next_frame(anim_instance *instance, float frametime);
 void				anim_release_all_instances(int screen_id = 0);
 void				anim_release_render_instance(anim_instance* instance);
-anim			  *anim_load(const char *name, int cf_dir_type = CF_TYPE_ANY, int file_mapped = PAGE_FROM_DISK);
+anim			  *anim_load(const char *name, int cf_dir_type = CF_TYPE_ANY);
 int				anim_free(anim *ptr);
 void				anim_read_header(anim *ptr, CFILE *fp);
 void				anim_reverse_direction(anim_instance *ai);						// called automatically for ping-ponging, and can also be called externally