More config.c clean-ups and added some plumbing for the future ZIP and MO image history.

src/include/86box/mo.h

@@ -27,6 +27,8 @@
 
 #define MO_TIME  10.0
 
+#define MO_IMAGE_HISTORY         4
+
 typedef struct mo_type_t {
     uint32_t sectors;
     uint16_t bytes_per_sector;
@@ -113,6 +115,8 @@ typedef struct mo_drive_t {
     char image_path[1024];
     char prev_image_path[1024];
 
+    char *image_history[MO_IMAGE_HISTORY];
+
     uint32_t type;
     uint32_t medium_size;
     uint32_t base;

src/include/86box/path.h

@@ -3,5 +3,6 @@ extern char *path_get_filename(char *s);
 extern char *path_get_extension(char *s);
 extern void  path_append_filename(char *dest, const char *s1, const char *s2);
 extern void  path_slash(char *path);
+extern char *path_get_slash(char *path);
 extern void  path_normalize(char *path);
 extern int   path_abs(char *path);

src/include/86box/zip.h

@@ -29,6 +29,8 @@
 
 #define ZIP_250_SECTORS (489532)
 
+#define ZIP_IMAGE_HISTORY         4
+
 enum {
     ZIP_BUS_DISABLED = 0,
     ZIP_BUS_ATAPI    = 5,
@@ -61,6 +63,8 @@ typedef struct zip_drive_t {
     char image_path[1024];
     char prev_image_path[1024];
 
+    char *image_history[ZIP_IMAGE_HISTORY];
+
     uint32_t is_250;
     uint32_t medium_size;
     uint32_t base;