From 2ee45968c4833a609ac2889d9a49e13f5f4e9ad8 Mon Sep 17 00:00:00 2001
From: "ol.sc" <ol.sc@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Sun, 30 Sep 2012 14:58:31 +0000
Subject: [PATCH] Adjusted according to the recently updated readdir() doc that
 now says:

"On several platforms, namely the CBMs and the Atari, the disk drives get confused when opening/closing files between directory reads. So for example a program that reads the list of files on a disk, and after each call to readdir, opens the file to process it, will fail.
Possible solutions are reading the directory into memory before processing the file list, or to reset the directory by seeking to the correct position after opening/closing a file:
        seekdir (DIR, telldir (DIR));
Platforms known to work without problems are: Apple."

git-svn-id: svn://svn.cc65.org/cc65/trunk@5832 b7a2c559-68d2-44c3-8de9-860c34a00d81
---
 samples/multidemo.c | 29 ++++++++++++++++++++++-------
 1 file changed, 22 insertions(+), 7 deletions(-)

diff --git a/samples/multidemo.c b/samples/multidemo.c
index 1bbf20d2d..bdf669cb0 100644
--- a/samples/multidemo.c
+++ b/samples/multidemo.c
@@ -42,6 +42,11 @@ struct {
  */
 #define MAX_EM_OVERLAY 3
 
+/* Search for up to 10 extended memory drivers.
+ */
+#define MAX_EM_DRIVER 10
+
+
 
 /* Functions resident in an overlay can call back functions resident in the
  * main program at any time without any precautions. The function log() is
@@ -96,8 +101,11 @@ void foobar (void)
 
 unsigned char loademdriver (void)
 {
+    static char emd[MAX_EM_DRIVER][FILENAME_MAX];
     DIR* dir;
     struct dirent* ent;
+    unsigned char max = 0;
+    unsigned char num;
 
     printf ("Dbg: Searching for emdrivers\n");
     dir = opendir (".");
@@ -119,17 +127,24 @@ unsigned char loademdriver (void)
             continue;
         }
 
-        printf ("Dbg: Trying emdriver %s\n", ent->d_name);
-        if (em_load_driver (ent->d_name) == EM_ERR_OK) {
-            printf ("Dbg: Loaded emdriver %s\n", ent->d_name);
+        printf ("Dbg: Memorizing file %s\n", ent->d_name);
+        strcpy (emd[max], ent->d_name);
+        if (++max == MAX_EM_DRIVER) {
             break;
         }
- 
-        printf ("Dbg: Emdriver %s failed\n", ent->d_name);
     }
-
     closedir (dir);
-    return ent != NULL;
+
+    for (num = 0; num < max; ++num) {
+        printf ("Dbg: Trying emdriver %s\n", emd[num]);
+        if (em_load_driver (emd[num]) == EM_ERR_OK) {
+            printf ("Dbg: Loaded emdriver %s\n", emd[num]);
+            return 1;
+        }
+ 
+        printf ("Dbg: Emdriver %s failed\n", emd[num]);
+    }
+    return 0;
 }
 
 void copyoverlays (void)