From fb63e94110d271b1ab346fa598d318e458b9bbd7 Mon Sep 17 00:00:00 2001
From: Fritz Elfert <felfert@to.com>
Date: Thu, 26 Jul 2001 13:07:36 +0000
Subject: Configure check and support for readline 4.2

---
 acconfig.h                             |  9 +++++++++
 conf/m4/plptools/PLP_CHECK_READLINE.m4 | 28 ++++++++++++++++++++++++++++
 plpftp/ftp.cc                          | 24 ++++++++++++++++++------
 3 files changed, 55 insertions(+), 6 deletions(-)

diff --git a/acconfig.h b/acconfig.h
index b3e338e..9c2812f 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -69,6 +69,15 @@
 /* Define this to enable debugging code */
 #undef DEBUG
 
+/* Define this, if sys/int_types.h is on your system */
+#undef HAVE_SYS_INT_TYPES_H
+
+/* Define this, if your int-types have an underscore after the first u/s */
+#undef GNU_INTTYPES
+
+/* Define to 401 or 402, depending on readline version 4.1 or 4.2 */
+#define READLINE_VERSION 401
+
 @BOTTOM@
 
 /* Some reasonable defaults */
diff --git a/conf/m4/plptools/PLP_CHECK_READLINE.m4 b/conf/m4/plptools/PLP_CHECK_READLINE.m4
index 1b99a19..3df8b5b 100644
--- a/conf/m4/plptools/PLP_CHECK_READLINE.m4
+++ b/conf/m4/plptools/PLP_CHECK_READLINE.m4
@@ -29,13 +29,41 @@ AC_DEFUN(PLP_CHECK_READLINE,
 			ac_cv_addcurses=true
 			AC_DEFINE_UNQUOTED(HAVE_LIBREADLINE)
 			AC_MSG_RESULT([yes, and needs libcurses])
+			PLP_READLINE_402
 			;;
 		1*)
 			ac_cv_have_libreadline=true;
 			AC_DEFINE_UNQUOTED(HAVE_LIBREADLINE)
 			AC_MSG_RESULT(yes)
+			PLP_READLINE_402
 			;;
 	esac
 	AM_CONDITIONAL(HAVE_LIBREADLINE, test x$ac_cv_have_libreadline = xtrue)
 	AM_CONDITIONAL(ADD_LIBCURSES, test x$ac_cv_addcurses = xtrue)
 ])
+
+dnl
+dnl Check for readline version.
+dnl Those readline developers change their API too frequently
+dnl and don't provide a version number in the headers :-(
+dnl
+AC_DEFUN(PLP_READLINE_402,
+[
+	AC_MSG_CHECKING(for readline version)
+	saved_libs=$LIBS
+	if $ac_cv_addcurses ; then
+		LIBS="$LIBS -lreadline -lcurses"
+	else
+		LIBS="$LIBS -lreadline"
+	fi
+	rl42=false
+	AC_TRY_LINK(,[extern void rl_set_prompt(void); rl_set_prompt();],rl42=true)
+	LIBS="$saved_LIBS"
+	if $rl42 ; then
+		AC_MSG_RESULT(4.2 or greater)
+		AC_DEFINE_UNQUOTED(READLINE_VERSION,402)
+	else
+		AC_DEFINE_UNQUOTED(READLINE_VERSION,401)
+		AC_MSG_RESULT(4.1 or less)
+	fi
+])
diff --git a/plpftp/ftp.cc b/plpftp/ftp.cc
index e0de311..ab0492a 100644
--- a/plpftp/ftp.cc
+++ b/plpftp/ftp.cc
@@ -970,6 +970,18 @@ session(rfsv & a, rpcs & r, int xargc, char **xargv)
 }
 
 #if HAVE_LIBREADLINE
+#if (READLINE_VERSION >= 402)
+#define NULL_COMPLETION_RETTYPE char*
+#define NULL_COMPLETION_RETVAL ""
+#define FUNCAST(f) (CPFunction *)f
+#define MATCHFUNCTION rl_completion_matches
+#else
+#define NULL_COMPLETION_RETTYPE int
+#define NULL_COMPLETION_RETVAL 0
+#define FUNCAST(f) (Function *)f
+#define MATCHFUNCTION completion_matches
+#endif
+
 static char *all_commands[] = {
     "pwd", "ren", "touch", "gtime", "test", "gattr", "sattr", "devs",
     "dir", "ls", "dircnt", "cd", "lcd", "get", "put", "mget", "mput",
@@ -1045,9 +1057,9 @@ command_generator(char *text, int state)
     return NULL;
 }
 
-static int
+static NULL_COMPLETION_RETTYPE
 null_completion() {
-    return 0;
+    return NULL_COMPLETION_RETVAL;
 }
 
 static char **
@@ -1055,10 +1067,10 @@ do_completion(char *text, int start, int end)
 {
     char **matches = NULL;
 
-    rl_completion_entry_function = (Function *)null_completion;
+    rl_completion_entry_function = FUNCAST(null_completion);
     rl_completion_append_character = ' ';
     if (start == 0)
-	matches = completion_matches(text, cmdgen_ptr);
+	matches = MATCHFUNCTION(text, cmdgen_ptr);
     else {
 	int idx = 0;
 	char *name;
@@ -1086,7 +1098,7 @@ do_completion(char *text, int start, int end)
 		maskAttr = rfsv::PSI_A_DIR;
 	}
 
-	matches = completion_matches(text, fnmgen_ptr);
+	matches = MATCHFUNCTION(text, fnmgen_ptr);
     }
     return matches;
 }
@@ -1097,7 +1109,7 @@ initReadline(void)
 {
 #if HAVE_LIBREADLINE
     rl_readline_name = "plpftp";
-    rl_completion_entry_function = (Function *)null_completion;
+    rl_completion_entry_function = FUNCAST(null_completion);
     rl_attempted_completion_function = (CPPFunction *)do_completion;
     rlcrap_setpointers(command_generator, filename_generator);
 #endif
-- 
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