This file is complete.def, from which is created complete.c.
It implements the builtins "complete" and "compgen" in Bash.

Copyright (C) 1999-2002 Free Software Foundation, Inc.

This file is part of GNU Bash, the Bourne Again SHell.

Bash is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

Bash is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with Bash; see the file COPYING.  If not, write to the Free Software
Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA.

$PRODUCES complete.c

$BUILTIN complete
$DEPENDS_ON PROGRAMMABLE_COMPLETION
$FUNCTION complete_builtin
$SHORT_DOC complete [-abcdefgjksuv] [-pr] [-o option] [-A action] [-G globpat] [-W wordlist] [-P prefix] [-S suffix] [-X filterpat] [-F function] [-C command] [name ...]
For each NAME, specify how arguments are to be completed.
If the -p option is supplied, or if no options are supplied, existing
completion specifications are printed in a way that allows them to be
reused as input.  The -r option removes a completion specification for
each NAME, or, if no NAMEs are supplied, all completion specifications.
$END

#include <config.h>

#include <stdio.h>

#include "../bashtypes.h"

#if defined (HAVE_UNISTD_H)
#  include <unistd.h>
#endif

#include "../bashansi.h"

#include "../shell.h"
#include "../builtins.h"
#include "../pcomplete.h"

#include "common.h"
#include "bashgetopt.h"

#include <readline/readline.h>

#define STRDUP(x)       ((x) ? savestring (x) : (char *)NULL)

static int find_compact __P((char *));
static int find_compopt __P((char *));

static int build_actions __P((WORD_LIST *, int *, int *, unsigned long *, unsigned long *));

static int remove_cmd_completions __P((WORD_LIST *));

static int print_one_completion __P((char *, COMPSPEC *));
static int print_compitem __P((BUCKET_CONTENTS *));
static void print_all_completions __P((void));
static int print_cmd_completions __P((WORD_LIST *));

static char *Garg, *Warg, *Parg, *Sarg, *Xarg, *Farg, *Carg;

static struct _compacts {
  char *actname;
  int actflag;
  int actopt;
} compacts[] = {
  { "alias",     CA_ALIAS,     'a' },
  { "arrayvar",  CA_ARRAYVAR,   0 },
  { "binding",   CA_BINDING,    0 },
  { "builtin",   CA_BUILTIN,   'b' },
  { "command",   CA_COMMAND,   'c' },
  { "directory", CA_DIRECTORY, 'd' },
  { "disabled",  CA_DISABLED,   0 },
  { "enabled",   CA_ENABLED,    0 },
  { "export",    CA_EXPORT,    'e' },
  { "file",      CA_FILE,      'f' },
  { "function",  CA_FUNCTION,   0 },
  { "helptopic", CA_BUILTIN,  0 },	/* for now */
  { "hostname",  CA_HOSTNAME,   0 },
  { "group",     CA_GROUP,     'g' },
  { "job",       CA_JOB,       'j' },
  { "keyword",   CA_KEYWORD,   'k' },
  { "running",   CA_RUNNING,    0 },
  { "service",   CA_SERVICE,   's' },
  { "setopt",    CA_SETOPT,     0 },
  { "shopt",     CA_SHOPT,      0 },
  { "signal",    CA_SIGNAL,     0 },
  { "stopped",   CA_STOPPED,    0 },
  { "user",      CA_USER,      'u' },
  { "variable",  CA_VARIABLE,  'v' },
  { (char *)NULL, 0, 0 },
};

/* This should be a STRING_INT_ALIST */
static struct _compopt {
  char *optname;
  int optflag;
} compopts[] = {
  { "default",	COPT_DEFAULT },
  { "dirnames", COPT_DIRNAMES },
  { "filenames",COPT_FILENAMES},
  { "nospace",	COPT_NOSPACE },
  { (char *)NULL, 0 },
};

static int
find_compact (name)
     char *name;
{
  register int i;

  for (i = 0; compacts[i].actname; i++)
    if (STREQ (name, compacts[i].actname))
      return i;
  return -1;
}

static int
find_compopt (name)
     char *name;
{
  register int i;

  for (i = 0; compopts[i].optname; i++)
    if (STREQ (name, compopts[i].optname))
      return i;
  return -1;
}

/* Build the actions and compspec options from the options specified in LIST.
   ACTP is a pointer to an unsigned long in which to place the bitmap of
   actions.  OPTP is a pointer to an unsigned long in which to place the
   btmap of compspec options (arguments to `-o').  PP, if non-null, gets 1
   if -p is supplied; RP, if non-null, gets 1 if -r is supplied.
   If either is null, the corresponding option generates an error.
   This also sets variables corresponding to options that take arguments as
   a side effect; the caller should ensure that those variables are set to
   NULL before calling build_actions.  Return value:
   	EX_USAGE = bad option
   	EXECUTION_SUCCESS = some options supplied
   	EXECUTION_FAILURE = no options supplied
*/

static int
build_actions (list, pp, rp, actp, optp)
     WORD_LIST *list;
     int *pp, *rp;
     unsigned long *actp, *optp;
{
  int opt, ind, opt_given;
  unsigned long acts, copts;

  acts = copts = (unsigned long)0L;
  opt_given = 0;

  reset_internal_getopt ();
  while ((opt = internal_getopt (list, "abcdefgjko:prsuvA:G:W:P:S:X:F:C:")) != -1)
    {
      opt_given = 1;
      switch (opt)
	{
	case 'r':
	  if (rp)
	    {
	      *rp = 1;
	      break;
	    }
	  else
	    {
	      sh_invalidopt ("-r");
	      builtin_usage ();
	      return (EX_USAGE);
	    }

	case 'p':
	  if (pp)
	    {
	      *pp = 1;
	      break;
	    }
	  else
	    {
	      sh_invalidopt ("-p");
	      builtin_usage ();
	      return (EX_USAGE);
	    }

	case 'a':
	  acts |= CA_ALIAS;
	  break;
	case 'b':
	  acts |= CA_BUILTIN;
	  break;
	case 'c':
	  acts |= CA_COMMAND;
	  break;
	case 'd':
	  acts |= CA_DIRECTORY;
	  break;
	case 'e':
	  acts |= CA_EXPORT;
	  break;
	case 'f':
	  acts |= CA_FILE;
	  break;
	case 'g':
	  acts |= CA_GROUP;
	  break;
	case 'j':
	  acts |= CA_JOB;
	  break;
	case 'k':
	  acts |= CA_KEYWORD;
	  break;
	case 's':
	  acts |= CA_SERVICE;
	  break;
	case 'u':
	  acts |= CA_USER;
	  break;
	case 'v':
	  acts |= CA_VARIABLE;
	  break;
	case 'o':
	  ind = find_compopt (list_optarg);
	  if (ind < 0)
	    {
	      sh_invalidoptname (list_optarg);
	      return (EX_USAGE);
	    }
	  copts |= compopts[ind].optflag;
	  break;
	case 'A':
	  ind = find_compact (list_optarg);
	  if (ind < 0)
	    {
	      builtin_error ("%s: invalid action name", list_optarg);
	      return (EX_USAGE);
	    }
	  acts |= compacts[ind].actflag;
	  break;
	case 'C':
	  Carg = list_optarg;
	  break;
	case 'F':
	  Farg = list_optarg;
	  break;
	case 'G':
	  Garg = list_optarg;
	  break;
	case 'P':
	  Parg = list_optarg;
	  break;
	case 'S':
	  Sarg = list_optarg;
	  break;
	case 'W':
	  Warg = list_optarg;
	  break;
	case 'X':
	  Xarg = list_optarg;
	  break;
	default:
	  builtin_usage ();
	  return (EX_USAGE);
	}
    }

  *actp = acts;
  *optp = copts;

  return (opt_given ? EXECUTION_SUCCESS : EXECUTION_FAILURE);
}

/* Add, remove, and display completion specifiers. */
int
complete_builtin (list)
     WORD_LIST *list;
{
  int opt_given, pflag, rflag, rval;
  unsigned long acts, copts;
  COMPSPEC *cs;

  if (list == 0)
    {
      print_all_completions ();
      return (EXECUTION_SUCCESS);
    }

  opt_given = pflag = rflag = 0;
  acts = copts = (unsigned long)0L;
  Garg = Warg = Parg = Sarg = Xarg = Farg = Carg = (char *)NULL;
  cs = (COMPSPEC *)NULL;

  /* Build the actions from the arguments.  Also sets the [A-Z]arg variables
     as a side effect if they are supplied as options. */
  rval = build_actions (list, &pflag, &rflag, &acts, &copts);
  if (rval == EX_USAGE)
    return (rval);
  opt_given = rval != EXECUTION_FAILURE;

  list = loptend;

  /* -p overrides everything else */
  if (pflag || (list == 0 && opt_given == 0))
    {
      if (list == 0)
	{
	  print_all_completions ();
	  return (EXECUTION_SUCCESS);
	}
      return (print_cmd_completions (list));
    }

  /* next, -r overrides everything else. */
  if (rflag)
    {
      if (list == 0)
	{
	  progcomp_flush ();
	  return (EXECUTION_SUCCESS);
	}
      return (remove_cmd_completions (list));
    }

  if (list == 0 && opt_given)
    {
      builtin_usage ();
      return (EX_USAGE);
    }

  /* If we get here, we need to build a compspec and add it for each
     remaining argument. */
  cs = compspec_create ();
  cs->actions = acts;
  cs->options = copts;

  cs->globpat = STRDUP (Garg);
  cs->words = STRDUP (Warg);
  cs->prefix = STRDUP (Parg);
  cs->suffix = STRDUP (Sarg);
  cs->funcname = STRDUP (Farg);
  cs->command = STRDUP (Carg);
  cs->filterpat = STRDUP (Xarg);

  for (rval = EXECUTION_SUCCESS ; list; list = list->next)
    {
      /* Add CS as the compspec for the specified commands. */
      if (progcomp_insert (list->word->word, cs) == 0)
	rval = EXECUTION_FAILURE;
    }

  return (rval);
}

static int
remove_cmd_completions (list)
     WORD_LIST *list;
{
  WORD_LIST *l;
  int ret;

  for (ret = EXECUTION_SUCCESS, l = list; l; l = l->next)
    {
      if (progcomp_remove (l->word->word) == 0)
	{
	  builtin_error ("%s: no completion specification", l->word->word);
	  ret = EXECUTION_FAILURE;
	}
    }
  return ret;
}

#define SQPRINTARG(a, f) \
  do { \
    if (a) \
      { \
      	x = sh_single_quote (a); \
	printf ("%s %s ", f, x); \
	free (x); \
      } \
  } while (0)

#define PRINTARG(a, f) \
  do { \
    if (a) \
      printf ("%s %s ", f, a); \
  } while (0)

#define PRINTOPT(a, f) \
  do { \
    if (acts & a) \
      printf ("%s ", f); \
  } while (0)

#define PRINTACT(a, f) \
  do { \
    if (acts & a) \
      printf ("-A %s ", f); \
  } while (0)

#define PRINTCOMPOPT(a, f) \
  do { \
    if (copts & a) \
      printf ("-o %s ", f); \
  } while (0)

static int
print_one_completion (cmd, cs)
     char *cmd;
     COMPSPEC *cs;
{
  unsigned long acts, copts;
  char *x;

  printf ("complete ");

  copts = cs->options;

  /* First, print the -o options. */
  PRINTCOMPOPT (COPT_DEFAULT, "default");
  PRINTCOMPOPT (COPT_DIRNAMES, "dirnames");
  PRINTCOMPOPT (COPT_FILENAMES, "filenames");
  PRINTCOMPOPT (COPT_NOSPACE, "nospace");

  acts = cs->actions;

  /* simple flags next */
  PRINTOPT (CA_ALIAS, "-a");
  PRINTOPT (CA_BUILTIN, "-b");
  PRINTOPT (CA_COMMAND, "-c");
  PRINTOPT (CA_DIRECTORY, "-d");
  PRINTOPT (CA_EXPORT, "-e");
  PRINTOPT (CA_FILE, "-f");
  PRINTOPT (CA_GROUP, "-g");
  PRINTOPT (CA_JOB, "-j");
  PRINTOPT (CA_KEYWORD, "-k");
  PRINTOPT (CA_SERVICE, "-s");
  PRINTOPT (CA_USER, "-u");
  PRINTOPT (CA_VARIABLE, "-v");

  /* now the rest of the actions */
  PRINTACT (CA_ARRAYVAR, "arrayvar");
  PRINTACT (CA_BINDING, "binding");
  PRINTACT (CA_DISABLED, "disabled");
  PRINTACT (CA_ENABLED, "enabled");
  PRINTACT (CA_FUNCTION, "function");
  PRINTACT (CA_HELPTOPIC, "helptopic");
  PRINTACT (CA_HOSTNAME, "hostname");
  PRINTACT (CA_RUNNING, "running");
  PRINTACT (CA_SETOPT, "setopt");
  PRINTACT (CA_SHOPT, "shopt");
  PRINTACT (CA_SIGNAL, "signal");
  PRINTACT (CA_STOPPED, "stopped");

  /* now the rest of the arguments */

  /* arguments that require quoting */
  SQPRINTARG (cs->globpat, "-G");
  SQPRINTARG (cs->words, "-W");
  SQPRINTARG (cs->prefix, "-P");
  SQPRINTARG (cs->suffix, "-S");
  SQPRINTARG (cs->filterpat, "-X");

  /* simple arguments that don't require quoting */
  PRINTARG (cs->funcname, "-F");
  PRINTARG (cs->command, "-C");

  printf ("%s\n", cmd);

  return (0);
}

static int
print_compitem (item)
     BUCKET_CONTENTS *item;
{
  COMPSPEC *cs;
  char *cmd;

  cmd = item->key;
  cs = (COMPSPEC *)item->data;

  return (print_one_completion (cmd, cs));
}

static void
print_all_completions ()
{
  progcomp_walk (print_compitem);
}

static int
print_cmd_completions (list)
     WORD_LIST *list;
{
  WORD_LIST *l;
  COMPSPEC *cs;
  int ret;

  for (ret = EXECUTION_SUCCESS, l = list; l; l = l->next)
    {
      cs = progcomp_search (l->word->word);
      if (cs)
	print_one_completion (l->word->word, cs);
      else
	{
	  builtin_error ("%s: no completion specification", l->word->word);
	  ret = EXECUTION_FAILURE;
	}
    }
  return (ret);
}

$BUILTIN compgen
$DEPENDS_ON PROGRAMMABLE_COMPLETION
$FUNCTION compgen_builtin
$SHORT_DOC compgen [-abcdefgjksuv] [-o option] [-A action] [-G globpat] [-W wordlist] [-P prefix] [-S suffix] [-X filterpat] [-F function] [-C command] [word]
Display the possible completions depending on the options.  Intended
to be used from within a shell function generating possible completions.
If the optional WORD argument is supplied, matches against WORD are
generated.
$END

int
compgen_builtin (list)
     WORD_LIST *list;
{
  int rval;
  unsigned long acts, copts;
  COMPSPEC *cs;
  STRINGLIST *sl;
  char *word;

  if (list == 0)
    return (EXECUTION_SUCCESS);

  acts = copts = (unsigned long)0L;
  Garg = Warg = Parg = Sarg = Xarg = Farg = Carg = (char *)NULL;
  cs = (COMPSPEC *)NULL;

  /* Build the actions from the arguments.  Also sets the [A-Z]arg variables
     as a side effect if they are supplied as options. */
  rval = build_actions (list, (int *)NULL, (int *)NULL, &acts, &copts);
  if (rval == EX_USAGE)
    return (rval);
  if (rval == EXECUTION_FAILURE)
    return (EXECUTION_SUCCESS);

  list = loptend;

  word = (list && list->word) ? list->word->word : "";

  if (Farg)
    internal_warning ("compgen: -F option may not work as you expect");
  if (Carg)
    internal_warning ("compgen: -C option may not work as you expect");

  /* If we get here, we need to build a compspec and evaluate it. */
  cs = compspec_create ();
  cs->actions = acts;
  cs->options = copts;
  cs->refcount = 1;

  cs->globpat = STRDUP (Garg);
  cs->words = STRDUP (Warg);
  cs->prefix = STRDUP (Parg);
  cs->suffix = STRDUP (Sarg);
  cs->funcname = STRDUP (Farg);
  cs->command = STRDUP (Carg);
  cs->filterpat = STRDUP (Xarg);

  rval = EXECUTION_FAILURE;
  sl = gen_compspec_completions (cs, "compgen", word, 0, 0);

  /* This isn't perfect, but it's the best we can do, given what readline
     exports from its set of completion utility functions. */
  if ((sl == 0 || sl->list_len == 0) && (copts & COPT_DEFAULT))
    {
      char **matches;

      matches = rl_completion_matches (word, rl_filename_completion_function);
      sl = completions_to_stringlist (matches);
      strvec_dispose (matches);
    }

  if (sl)
    {
      if (sl->list && sl->list_len)
	{
	  rval = EXECUTION_SUCCESS;
	  strlist_print (sl, (char *)NULL);
	}
      strlist_dispose (sl);
    }

  compspec_dispose (cs);
  return (rval);
}
