Basic support for custom completion handlers with the two "standard"

rl_complete() and rl_list_possib().  Simply leave out complete.o from
the default build and in all programs require these two functions to
be supplied.

A better alternative would be to use function pointers and check those
for NULL in the running code.  With this code, and no completion handler
the editline code will die.

examples/Makefile.am

@@ -1,10 +1,10 @@
 AUTOMAKE_OPTIONS = foreign
 
 LDADD = $(top_builddir)/src/libedit.a
-AM_CFLAGS = -I$(top_srcdir)/src
+AM_CFLAGS = -I$(top_srcdir)/src -I$(top_srcdir)/include
 
 # TODO: Port "fileman" example from BSD editline
-noinst_PROGRAMS = testit
+noinst_PROGRAMS = testit cli
 
 testit_SOURCES = testit.c
 #fileman_SOURCES = fileman.c

examples/Makefile.in

@@ -30,7 +30,7 @@ POST_INSTALL = :
 NORMAL_UNINSTALL = :
 PRE_UNINSTALL = :
 POST_UNINSTALL = :
-noinst_PROGRAMS = testit$(EXEEXT)
+noinst_PROGRAMS = testit$(EXEEXT) cli$(EXEEXT)
 subdir = examples
 DIST_COMMON = $(srcdir)/Makefile.am $(srcdir)/Makefile.in
 ACLOCAL_M4 = $(top_srcdir)/aclocal.m4
@@ -41,6 +41,10 @@ mkinstalldirs = $(install_sh) -d
 CONFIG_HEADER = $(top_builddir)/config.h
 CONFIG_CLEAN_FILES =
 PROGRAMS = $(noinst_PROGRAMS)
+cli_SOURCES = cli.c
+cli_OBJECTS = cli.$(OBJEXT)
+cli_LDADD = $(LDADD)
+cli_DEPENDENCIES = $(top_builddir)/src/libedit.a
 am_testit_OBJECTS = testit.$(OBJEXT)
 testit_OBJECTS = $(am_testit_OBJECTS)
 testit_LDADD = $(LDADD)
@@ -52,8 +56,8 @@ COMPILE = $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(AM_CPPFLAGS) \
 	$(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS)
 CCLD = $(CC)
 LINK = $(CCLD) $(AM_CFLAGS) $(CFLAGS) $(AM_LDFLAGS) $(LDFLAGS) -o $@
-SOURCES = $(testit_SOURCES)
-DIST_SOURCES = $(testit_SOURCES)
+SOURCES = cli.c $(testit_SOURCES)
+DIST_SOURCES = cli.c $(testit_SOURCES)
 ETAGS = etags
 CTAGS = ctags
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
@@ -144,7 +148,7 @@ top_builddir = @top_builddir@
 top_srcdir = @top_srcdir@
 AUTOMAKE_OPTIONS = foreign
 LDADD = $(top_builddir)/src/libedit.a
-AM_CFLAGS = -I$(top_srcdir)/src
+AM_CFLAGS = -I$(top_srcdir)/src -I$(top_srcdir)/include
 testit_SOURCES = testit.c
 all: all-am
 
@@ -182,6 +186,9 @@ $(ACLOCAL_M4):  $(am__aclocal_m4_deps)
 
 clean-noinstPROGRAMS:
 	-test -z "$(noinst_PROGRAMS)" || rm -f $(noinst_PROGRAMS)
+cli$(EXEEXT): $(cli_OBJECTS) $(cli_DEPENDENCIES) 
+	@rm -f cli$(EXEEXT)
+	$(LINK) $(cli_OBJECTS) $(cli_LDADD) $(LIBS)
 testit$(EXEEXT): $(testit_OBJECTS) $(testit_DEPENDENCIES) 
 	@rm -f testit$(EXEEXT)
 	$(LINK) $(testit_OBJECTS) $(testit_LDADD) $(LIBS)
@@ -192,6 +199,7 @@ mostlyclean-compile:
 distclean-compile:
 	-rm -f *.tab.c
 
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/cli.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/testit.Po@am__quote@
 
 .c.o:

examples/cli.c

@@ -0,0 +1,78 @@
+/* The "testit" micro shell, now with command completion. 
+ * To be able to run, don't "--enable-default-complete".
+ */
+#include "editline.h"
+#include <string.h>
+
+char *list[] = {
+   "foo ", "bar ", "bsd ", "cli ", "ls ", "cd ", "malloc ", "tee ", NULL
+};
+
+/*
+**  Attempt to complete the pathname, returning an allocated copy.
+**  Fill in *unique if we completed it, or set it to 0 if ambiguous.
+*/
+char *rl_complete(char *token, int *match)
+{
+   int i;
+   int index = -1;
+   int matchlen = 0;
+   int count = 0;
+
+   for (i = 0; list[i]; i++)
+   {
+      int partlen = strlen (token); /* Part of token */
+
+      if (!strncmp (list[i], token, partlen))
+      {
+         index = i;
+         matchlen = partlen;
+         count ++;
+      }
+   }
+
+   if (count == 1)
+   {
+      *match = 1;
+      return strdup (list[index] + matchlen);
+   }
+
+   return NULL;
+}
+
+/*
+**  Return all possible completions.
+*/
+int rl_list_possib(char *token, char ***av)
+{
+   int i, num, total = 0;
+   char **copy;
+   
+   for (num = 0; list[num]; num++)
+      ;
+   copy = (char **) malloc (num * sizeof(char *));
+   for (i = 0; i < num; i++)
+   {
+      if (!strncmp (list[i], token, strlen (token)))
+      {
+         copy[total] = strdup (list[i]);
+         total ++;
+      }
+   }
+   *av = copy;
+
+   return total;
+}
+
+int main(int ac, char *av[])
+{
+   char *line;
+   char	*prompt = "cli> ";
+
+   while ((line = readline(prompt)) != NULL) {
+      (void)printf("\t\t\t|%s|\n", line);
+      free(line);
+   }
+
+   return 0;
+}