Added enumdevdir showcasing the recently introduced device functions (together with directory access).

git-svn-id: svn://svn.cc65.org/cc65/trunk@5851 b7a2c559-68d2-44c3-8de9-860c34a00d81

samples/enumdevdir.c

@@ -0,0 +1,101 @@
+/*
+ * Enumerate devices, directories and files.
+ *
+ * 2012-10-15, Oliver Schmidt (ol.sc@web.de)
+ *
+ */
+
+
+
+#include <stdio.h>
+#include <conio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <device.h>
+#include <dirent.h>
+
+
+void printdir (char *newdir)
+{
+    char olddir[FILENAME_MAX];
+    char curdir[FILENAME_MAX];
+    DIR *dir;
+    struct dirent *ent;
+    char *subdirs = NULL;
+    unsigned dirnum = 0;
+    unsigned num;
+
+    getcwd (olddir, sizeof (olddir));
+    if (chdir (newdir)) {
+
+        /* If chdir() fails we just print the
+         * directory name - as done for files.
+         */
+        printf ("  Dir  %s\n", newdir);
+        return;
+    }
+
+    /* We call getcwd() in order to print the
+     * absolute pathname for a subdirectory.
+     */
+    getcwd (curdir, sizeof (curdir));
+    printf (" Dir %s:\n", curdir);
+
+    /* Calling opendir() always with "." avoids
+     * fiddling around with pathname separators.
+     */
+    dir = opendir (".");
+    while (ent = readdir (dir)) {
+
+        if (_DE_ISREG (ent->d_type)) {
+            printf ("  File %s\n", ent->d_name);
+            continue;
+        }
+
+        /* We defer handling of subdirectories until we're done with the
+         * current one as several targets don't support other disk i/o
+         * while reading a directory (see cc65 readdir() doc for more).
+         */
+        if (_DE_ISDIR (ent->d_type)) {
+            subdirs = realloc (subdirs, FILENAME_MAX * (dirnum + 1));
+            strcpy (subdirs + FILENAME_MAX * dirnum++, ent->d_name);
+        }
+    }
+    closedir (dir);
+
+    for (num = 0; num < dirnum; ++num) {
+        printdir (subdirs + FILENAME_MAX * num);
+    }
+    free (subdirs);
+
+    chdir (olddir);
+}
+
+
+void main (void)
+{
+    unsigned char device;
+    char devicedir[FILENAME_MAX];
+
+    /* Calling getfirstdevice()/getnextdevice() does _not_ turn on the motor
+     * of a drive-type device and does _not_ check for a disk in the drive.
+     */
+    device = getfirstdevice ();
+    while (device != INVALID_DEVICE) {
+        printf ("Device %d:\n", device);
+
+        /* Calling getdevicedir() _does_ check for a (formatted) disk in a
+         * floppy-disk-type device and returns NULL if that check fails.
+         */
+        if (getdevicedir (device, devicedir, sizeof (devicedir))) {
+            printdir (devicedir);
+        } else {
+            printf (" N/A\n");
+        }
+
+        device = getnextdevice (device);
+    }
+
+    cgetc ();
+}