[Qemu-devel] [PATCH v2] ioport: Fix duplicated code

[Luiz Capitulino <lcapitulino@redhat.com>]

Functions register_ioport_read() and register_ioport_write() are almost
identical, the only difference is that they write to different arrays.

Introduce register_ioport_rw() to handle this difference and change both
functions to use it instead of duplicating code.

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
---

v2: Fix error messages and make register_ioport_rw() register both handlers
    at the same call

 ioport.c |   37 ++++++++++++++++++-------------------
 1 files changed, 18 insertions(+), 19 deletions(-)

diff --git a/ioport.c b/ioport.c
index ec3dc65..4560973 100644
--- a/ioport.c
+++ b/ioport.c
@@ -137,41 +137,40 @@ static int ioport_bsize(int size, int *bsize)
 }
 
 /* size is the word size in byte */
-int register_ioport_read(pio_addr_t start, int length, int size,
-                         IOPortReadFunc *func, void *opaque)
+static int register_ioport_rw(pio_addr_t start, int length, int size,
+                              IOPortReadFunc *read_func,
+                              IOPortWriteFunc *write_func, void *opaque)
 {
     int i, bsize;
 
     if (ioport_bsize(size, &bsize)) {
-        hw_error("register_ioport_read: invalid size");
+        hw_error("register_ioport_rw: invalid size");
         return -1;
     }
     for(i = start; i < start + length; i += size) {
-        ioport_read_table[bsize][i] = func;
+        if (read_func) {
+            ioport_read_table[bsize][i] = read_func;
+        }
+        if (write_func) {
+            ioport_write_table[bsize][i] = write_func;
+        }
         if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
-            hw_error("register_ioport_read: invalid opaque");
+            hw_error("register_ioport_rw: invalid opaque");
         ioport_opaque[i] = opaque;
     }
     return 0;
 }
 
-/* size is the word size in byte */
+int register_ioport_read(pio_addr_t start, int length, int size,
+                         IOPortReadFunc *func, void *opaque)
+{
+    return register_ioport_rw(start, length, size, func, NULL, opaque);
+}
+
 int register_ioport_write(pio_addr_t start, int length, int size,
                           IOPortWriteFunc *func, void *opaque)
 {
-    int i, bsize;
-
-    if (ioport_bsize(size, &bsize)) {
-        hw_error("register_ioport_write: invalid size");
-        return -1;
-    }
-    for(i = start; i < start + length; i += size) {
-        ioport_write_table[bsize][i] = func;
-        if (ioport_opaque[i] != NULL && ioport_opaque[i] != opaque)
-            hw_error("register_ioport_write: invalid opaque");
-        ioport_opaque[i] = opaque;
-    }
-    return 0;
+    return register_ioport_rw(start, length, size, NULL, func, opaque);
 }
 
 void isa_unassign_ioport(pio_addr_t start, int length)
-- 
1.7.3.2.164.g6f10c