Completion of command names and variables

New completion entry functions for readline specific code:
  - compl_var for variables
  - compl_fn for functions
  - compl_builtin for builtins
  - compl_extcmd for external commands in path
  - compl_command, which combines the last three

The first three are simple wrappers for compl_name, which iterates over a
typical rc table (an array of structs) yielding the name fields.

The appropriate completion entry function is chosen based on the
character/token that preceeds the word to complete: '$' for variable,
beginning of line or one of [`@|&(){;] for command. Otherwise the shell falls
back to readline's default completion, which it also does, if the chosen
completion entry function finds no match.

1 files changed, 4 insertions, 0 deletions

diff --git a/rc.h b/rc.h
index 7ae0693..33d1460 100644
--- a/rc.h
+++ b/rc.h
@@ -181,6 +181,7 @@ extern int lineno;
 extern builtin_t *isbuiltin(char *);
 extern void b_exec(char **), funcall(char **), b_dot(char **), b_builtin(char **);
 extern char *which(char *, bool);
+extern char *compl_builtin(const char *, int);
 
 /* except.c */
 extern bool nl_on_intr;
@@ -259,6 +260,9 @@ extern void whatare_all_vars(bool, bool);
 extern void whatare_all_signals(void);
 extern void prettyprint_var(int, char *, List *);
 extern void prettyprint_fn(int, char *, Node *);
+extern char *compl_name(const char *, int, char **, size_t, ssize_t);
+extern char *compl_fn(const char *, int);
+extern char *compl_var(const char *, int);
 
 /* heredoc.c */
 extern int heredoc(int);