dir seeking

include/rp6502.h

@@ -133,14 +133,14 @@ long __fastcall__ ria_call_long (unsigned char op);
 /* C API for the operating system. */
 
 typedef struct {
-    unsigned long fsize;    /* File size (invalid for directory) */
+    unsigned long fsize;
-    unsigned fdate;         /* Date of file modification or directory creation */
+    unsigned fdate;
-    unsigned ftime;         /* Time of file modification or directory creation */
+    unsigned ftime;
-    unsigned crdate;        /* Date of object createion */
+    unsigned crdate;
-    unsigned crtime;        /* Time of object createion */
+    unsigned crtime;
-    unsigned char fattrib;  /* Object attribute */
+    unsigned char fattrib;
-    char altname[12 + 1];   /* Alternative object name */
+    char altname[12 + 1];
-    char fname[255 + 1];    /* Primary object name */
+    char fname[255 + 1];
 } f_stat_t;
 
 int __cdecl__ xregn (char device, char channel, unsigned char address, unsigned count,
@@ -157,8 +157,11 @@ int __fastcall__ write_xram (unsigned buf, unsigned count, int fildes);
 long __fastcall__ f_lseek (long offset, int whence, int fildes);
 int __fastcall__ f_stat (const char* path, f_stat_t* dirent);
 int __fastcall__ f_opendir (const char* name);
-int __fastcall__ f_readdir (f_stat_t *dirent, int dirdes);
+int __fastcall__ f_readdir (f_stat_t* dirent, int dirdes);
 int __fastcall__ f_closedir (int dirdes);
+long __fastcall__ f_telldir (int dirdes);
+int __fastcall__ f_seekdir (long offs, int dirdes);
+int __fastcall__ f_rewinddir (int dirdes);
 
 
 /* Time zone hack */

libsrc/rp6502/f_closedir.c

@@ -1,5 +1,4 @@
 #include <rp6502.h>
-#include <fcntl.h>
 
 int __fastcall__ f_closedir (int dirdes)
 {

libsrc/rp6502/f_lseek.c

@@ -1,5 +1,4 @@
 #include <rp6502.h>
-#include <unistd.h>
 
 long __fastcall__ f_lseek (long offset, int whence, int fildes)
 {

libsrc/rp6502/f_readdir.c

@@ -1,8 +1,6 @@
 #include <rp6502.h>
-#include <errno.h>
-#include <string.h>
 
-int __fastcall__ f_readdir (f_stat_t *dirent, int dirdes)
+int __fastcall__ f_readdir (f_stat_t* dirent, int dirdes)
 {
     int i, ax;
     ria_set_ax (dirdes);

libsrc/rp6502/f_rewinddir.c

@@ -0,0 +1,7 @@
+#include <rp6502.h>
+
+int __fastcall__ f_rewinddir (int dirdes)
+{
+    ria_set_ax (dirdes);
+    return ria_call_int (RIA_OP_REWINDDIR);
+}

libsrc/rp6502/f_seekdir.c

@@ -0,0 +1,8 @@
+#include <rp6502.h>
+
+int __fastcall__ f_seekdir (long offs, int dirdes)
+{
+    ria_set_ax (dirdes);
+    ria_push_long (offs);
+    return ria_call_int (RIA_OP_SEEKDIR);
+}

libsrc/rp6502/f_telldir.c

@@ -0,0 +1,7 @@
+#include <rp6502.h>
+
+long __fastcall__ f_telldir (int dirdes)
+{
+    ria_set_ax (dirdes);
+    return ria_call_long (RIA_OP_TELLDIR);
+}