agent: Move a typedef to common and provide parse_pinentry_mode.

* common/agent-opt.c: New.
* common/shareddefs.h: New.
* common/Makefile.am: Add new files.
* agent/agent.h: Include shareddefs.h.
(pinentry_mode_t): Factor out to shareddefs.h.
* agent/command.c (option_handler): Use parse_pinentry_mode.

agent/agent.h

@@ -34,6 +34,7 @@
 #include "../common/membuf.h"
 #include "../common/sysutils.h" /* (gnupg_fd_t) */
 #include "../common/session-env.h"
+#include "../common/shareddefs.h"
 
 /* To convey some special hash algorithms we use algorithm numbers
    reserved for application use. */
@@ -46,16 +47,6 @@
 #define MAX_DIGEST_LEN 64
 
 
-/* Values for the pinentry mode.  */
-typedef enum
-  {
-    PINENTRY_MODE_ASK = 0, /* Ask via pinentry (default).  */
-    PINENTRY_MODE_CANCEL,  /* Always return a cancel error.  */
-    PINENTRY_MODE_ERROR,   /* Return error code for no pinentry.  */
-    PINENTRY_MODE_LOOPBACK,/* Use an inquiry to get the value.    */
-  }
-pinentry_mode_t;
-
 
 /* A large struct name "opt" to keep global flags */
 struct

agent/command.c

@@ -2548,21 +2548,13 @@ option_handler (assuan_context_t ctx, const char *key, const char *value)
     ctrl->server_local->allow_pinentry_notify = 1;
   else if (!strcmp (key, "pinentry-mode"))
     {
-      if (!strcmp (value, "ask") || !strcmp (value, "default"))
-        ctrl->pinentry_mode = PINENTRY_MODE_ASK;
-      else if (!strcmp (value, "cancel"))
-        ctrl->pinentry_mode = PINENTRY_MODE_CANCEL;
-      else if (!strcmp (value, "error"))
-        ctrl->pinentry_mode = PINENTRY_MODE_ERROR;
-      else if (!strcmp (value, "loopback"))
-        {
-          if (opt.allow_loopback_pinentry)
-            ctrl->pinentry_mode = PINENTRY_MODE_LOOPBACK;
-          else
-            err = gpg_error (GPG_ERR_NOT_SUPPORTED);
-        }
-      else
+      int tmp = parse_pinentry_mode (value);
+      if (tmp == -1)
         err = gpg_error (GPG_ERR_INV_VALUE);
+      else if (tmp == PINENTRY_MODE_LOOPBACK && !opt.allow_loopback_pinentry)
+        err = gpg_error (GPG_ERR_NOT_SUPPORTED);
+      else
+        ctrl->pinentry_mode = tmp;
     }
   else if (!strcmp (key, "cache-ttl-opt-preset"))
     {

common/Makefile.am

@@ -59,6 +59,7 @@ common_sources = \
 	util.h i18n.c i18n.h \
 	estream.c estream.h estream-printf.c estream-printf.h \
 	status.c status.h\
+	shareddefs.h \
 	openpgpdefs.h \
 	gc-opt-flags.h \
 	keyserver.h \
@@ -92,6 +93,7 @@ common_sources = \
 	userids.c userids.h \
 	openpgp-oid.c \
 	ssh-utils.c ssh-utils.h \
+	agent-opt.c \
 	helpfile.c
 
 # To make the code easier to read we have split home some code into

common/agent-opt.c

@@ -0,0 +1,71 @@
+/* agent-opt.c - Helper for certain agent options
+ * Copyright (C) 2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of either
+ *
+ *   - the GNU Lesser General Public License as published by the Free
+ *     Software Foundation; either version 3 of the License, or (at
+ *     your option) any later version.
+ *
+ * or
+ *
+ *   - the GNU General Public License as published by the Free
+ *     Software Foundation; either version 2 of the License, or (at
+ *     your option) any later version.
+ *
+ * or both in parallel, as here.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "shareddefs.h"
+
+
+/* Parse VALUE and return an integer representing a pinentry_mode_t.
+   (-1) is returned for an invalid VALUE.  */
+int
+parse_pinentry_mode (const char *value)
+{
+  int result;
+
+  if (!strcmp (value, "ask") || !strcmp (value, "default"))
+    result = PINENTRY_MODE_ASK;
+  else if (!strcmp (value, "cancel"))
+    result = PINENTRY_MODE_CANCEL;
+  else if (!strcmp (value, "error"))
+    result = PINENTRY_MODE_ERROR;
+  else if (!strcmp (value, "loopback"))
+    result = PINENTRY_MODE_LOOPBACK;
+  else
+    result = -1;
+
+  return result;
+}
+
+/* Return the string representation for the pinentry MODE.  Returns
+   "?" for an invalid mode.  */
+const char *
+str_pinentry_mode (pinentry_mode_t mode)
+{
+  switch (mode)
+    {
+    case PINENTRY_MODE_ASK:      return "ask";
+    case PINENTRY_MODE_CANCEL:   return "cancel";
+    case PINENTRY_MODE_ERROR:    return "error";
+    case PINENTRY_MODE_LOOPBACK: return "loopback";
+    }
+ return "?";
+}

common/shareddefs.h

@@ -0,0 +1,48 @@
+/* shareddefs.h - Constants and helpers useful for all modules
+ * Copyright (C) 2013 Free Software Foundation, Inc.
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of either
+ *
+ *   - the GNU Lesser General Public License as published by the Free
+ *     Software Foundation; either version 3 of the License, or (at
+ *     your option) any later version.
+ *
+ * or
+ *
+ *   - the GNU General Public License as published by the Free
+ *     Software Foundation; either version 2 of the License, or (at
+ *     your option) any later version.
+ *
+ * or both in parallel, as here.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef GNUPG_COMMON_SHAREDDEFS_H
+#define GNUPG_COMMON_SHAREDDEFS_H
+
+/* Values for the pinentry mode.  */
+typedef enum
+  {
+    PINENTRY_MODE_ASK = 0, /* Ask via pinentry (default).  */
+    PINENTRY_MODE_CANCEL,  /* Always return a cancel error.  */
+    PINENTRY_MODE_ERROR,   /* Return error code for no pinentry.  */
+    PINENTRY_MODE_LOOPBACK /* Use an inquiry to get the value.    */
+  }
+pinentry_mode_t;
+
+
+/*-- agent-opt.c --*/
+int parse_pinentry_mode (const char *value);
+const char *str_pinentry_mode (pinentry_mode_t mode);
+
+
+
+#endif /*GNUPG_COMMON_SHAREDDEFS_H*/