commit 68f48fecfdb132ecf9f993c25b35a384f236fc9c
Author: Egeyar Bagcioglu <egeyar@gmail.com>
Date:   Sun Oct 25 22:18:51 2020 +0100

    ios: Synch IOD error values with IOS error values.
    
    2020-10-25  Egeyar Bagcioglu  <egeyar@gmail.com>
    
            * libpoke/ios-dev.h: Add IOD_OK, IOD_EIOFF, IOD_EFLAGS and IOD_ENOMEM.
            Change the values of IOD_EOF and IOD_EINVAL.
            * libpoke/ios.h: Add IOS_EOF and IOS_EINVAL. Define
            IOD_ERROR_TO_IOS_ERROR.

diff --git a/ChangeLog b/ChangeLog
index 92a4cd25..95da9548 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2020-10-25  Egeyar Bagcioglu  <egeyar@gmail.com>
+
+	* libpoke/ios-dev.h: Add IOD_OK, IOD_EIOFF, IOD_EFLAGS and IOD_ENOMEM.
+	Change the values of IOD_EOF and IOD_EINVAL.
+	* libpoke/ios.h: Add IOS_EOF and IOS_EINVAL. Define
+	IOD_ERROR_TO_IOS_ERROR.
+
 2020-10-25  Jose E. Marchesi  <jemarch@gnu.org>
 
 	* libpoke/pvm.h: Rename pvm_type_equal to pvm_type_equal_p.
diff --git a/libpoke/ios-dev.h b/libpoke/ios-dev.h
index 722571ee..2a7cc1b5 100644
--- a/libpoke/ios-dev.h
+++ b/libpoke/ios-dev.h
@@ -34,9 +34,14 @@ typedef uint64_t ios_dev_off;
 
 /* Error codes to be used in the interface below.  */
 
-#define IOD_ERROR  -1 /* Generic error.     */
-#define IOD_EOF    -2
-#define IOD_EINVAL -3 /* Invalid argument.  */
+#define IOD_OK      0 /* The operation was performed to completion,
+                         in the expected way.  */
+#define IOD_ERROR  -1 /* Generic error.  */
+#define IOD_EIOFF  -2 /* The provided offset is invalid.  */
+#define IOD_EFLAGS -3 /* Invalid flags specified.  */
+#define IOD_ENOMEM -4 /* Memory allocation failure.  */
+#define IOD_EOF    -5 /* End of file / input.  */
+#define IOD_EINVAL -6 /* Invalid argument.  */
 
 /* Each IO backend should implement a device interface, by filling an
    instance of the struct defined below.  */
diff --git a/libpoke/ios.h b/libpoke/ios.h
index 2f5973bf..f58c082e 100644
--- a/libpoke/ios.h
+++ b/libpoke/ios.h
@@ -89,13 +89,19 @@ typedef int64_t ios_off;
 /* The following status codes are used in the several APIs defined
    below in the file.  */
 
-#define IOS_OK 0       /* The operation was performed to completion, in
-                          the expected way.  */
+#define IOS_OK      0  /* The operation was performed to completion,
+                          in the expected way.  */
 
-#define IOS_ERROR -1   /* An unspecified error condition happened.  */
+#define IOS_ERROR  -1  /* An unspecified error condition happened.  */
 
 #define IOS_ENOMEM -4  /* Memory allocation failure.  */
 
+#define IOS_EOF    -5  /* End of file / input.  */
+
+#define IOS_EINVAL -6  /* Invalid argument.  */
+
+#define IOD_ERROR_TO_IOS_ERROR(error_no) (error_no)
+
 /* **************** IOS flags ******************************
 
    The 64-bit unsigned flags associated with IO spaces have the