linenoise: substring flag in completion callback.

A feature is hereby introduced into linenoise whereby
completion mode can be entered via Ctrl-X Tab also, not only
Tab.  This is distinguished with a flag in the completion
structure. The intent is that the callback can use this to
provide substring matches not only prefix matches.

* linenoise/linenoise.c (complete_line): Takes a new argument,
and stores it in the new substring member of
lino_completions_t.
(edit): If Tab is typed while in Ctrl-X extended mode,
then fall through to the regular switch, where the TAB
case now recognizes that it is in extended mode and passes
the mode flag to complete_line.

* linenoise/linenoise.h (lino_completions_t): New member,
substring.

1 files changed, 1 insertions, 0 deletions

diff --git a/linenoise/linenoise.h b/linenoise/linenoise.h
index 94cf3913..b6919254 100644
--- a/linenoise/linenoise.h
+++ b/linenoise/linenoise.h
@@ -50,6 +50,7 @@ typedef struct lino_state lino_t;
 typedef struct lino_completions {
   size_t len;
   char **cvec;
+  int substring;
 } lino_completions_t;
 
 typedef void lino_compl_cb_t(const char *, lino_completions_t *, void *ctx);