1 files changed, 88 insertions, 0 deletions
diff --git a/src/completion.c b/src/completion.c
new file mode 100644
index 0000000..b90f249
--- /dev/null
+++ b/src/completion.c
@@ -0,0 +1,88 @@
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/file.h>
+#include <sys/stat.h>
+#include <sys/errno.h>
+
+#include <readline/readline.h>
+#include <readline/history.h>
+
+#include <utils.h>
+#include <commands.h>
+
+/* **************************************************************** */
+/*                                                                  */
+/*                  Interface to Readline Completion                */
+/*                                                                  */
+/* **************************************************************** */
+
+/*
+   Generator function for command completion. STATE lets us know whether
+   to start from scratch; without any state (i.e. STATE == 0), then we
+   start at the top of the list.
+ */
+char *command_generator( const char *text, int state )
+{
+  static int list_index, len;
+  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 = current->list[list_index].name) )
+  {
+    list_index++;
+
+    if( strncmp(name, text, len) == 0 )
+      return( dupstr(name) );
+  }
+
+  /* If no names matched, then return NULL. */
+  return( (char *)NULL );
+}
+
+/*
+   Attempt to complete on the contents of TEXT. START and END show the
+   region of TEXT that contains the word to complete. We can use the
+   entire line in case we want to do some simple parsing. Return the
+   array of matches, or NULL if there aren't any.
+ */
+char **sila_completion( 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);
+}
+
+/*
+   Tell the GNU Readline library how to complete.  We want to try to complete
+   on command names if this is the first word in the line, or on filenames
+   if not.
+ */
+void initialize_readline()
+{
+  /* Allow conditional parsing of the ~/.inputrc file. */
+  rl_readline_name = "sila";
+
+  /* Tell the completer that we want a crack first. */
+  rl_attempted_completion_function = (rl_completion_func_t *)sila_completion;
+}
+