Changeset 2641 for box/trunk/bin/bbackupquery/bbackupquery.cpp

Timestamp:

25/02/2010 23:20:27 (2 years ago)

Author:

chris

Message:

First attempt at tab completion for readline/libedit in bbackupquery,
with commands and local file names, because it's easy and will help to
find compatibility problems.

File:

• box/trunk/bin/bbackupquery/bbackupquery.cpp (modified) (2 diffs)

box/trunk/bin/bbackupquery/bbackupquery.cpp

@@ -75 +75 @@
 }
 
+#ifdef HAVE_LIBREADLINE
+// copied from: http://tiswww.case.edu/php/chet/readline/readline.html#SEC44
+
+char * command_generator(const char *text, int state)
+{
+        static int list_index, len;
+        const char *name;
+
+        /* 
+         * If this is a new word to complete, initialize now.  This includes
+         * saving the length of TEXT for efficiency, and initializing the index
+         * variable to 0.
+         */
+        if(!state)
+        {
+                list_index = 0;
+                len = strlen(text);
+        }
+
+        /* Return the next name which partially matches from the command list. */
+        while((name = commands[list_index].name))
+        {
+                list_index++;
+
+                if(::strncmp(name, text, len) == 0 && !(state--))
+                {
+                        return ::strdup(name);
+                }
+        }
+
+        list_index = 0;
+
+        while((name = alias[list_index]))
+        {
+                list_index++;
+
+                if(::strncmp(name, text, len) == 0 && !(state--))
+                {
+                        return ::strdup(name);
+                }
+        }
+
+        /* If no names matched, then return NULL. */
+        return (char *) NULL;
+}
+
+char ** bbackupquery_completion(const char *text, int start, int end)
+{
+        char **matches;
+
+        matches = (char **)NULL;
+
+        /* If this word is at the start of the line, then it is a command
+         * to complete.  Otherwise it is the name of a file in the current
+         * directory.
+         */
+        if (start == 0)
+        {
+                matches = rl_completion_matches(text, command_generator);
+        }
+
+        return matches;
+}
+
+#endif // HAVE_LIBREADLINE
+
 int main(int argc, const char *argv[])
 {
@@ -370 +436 @@
         using_history();
 #endif
+        /* Allow conditional parsing of the ~/.inputrc file. */
+        rl_readline_name = "bbackupquery";
+
+        /* Tell the completer that we want a crack first. */
+        rl_attempted_completion_function = bbackupquery_completion;
+
         char *last_cmd = 0;
         while(!context.Stop())