/*
 * Copyright notice from original mutt:
 * Copyright (C) 1996-2000,2002 Michael R. Elkins <me@mutt.org>
 *
 * This file is part of mutt-ng, see http://www.muttng.org/.
 * It's licensed under the GNU General Public License,
 * please see the file GPL in the top level source directory.
 */

#if HAVE_CONFIG_H
# include "config.h"
#endif

#include "mutt.h"
#include "buffer.h"
#include "ascii.h"
#include "mutt_menu.h"
#include "mutt_curses.h"
#include "keymap.h"
#include "mapping.h"
#include "mutt_crypt.h"

#include "lib/mem.h"
#include "lib/intl.h"
#include "lib/str.h"

#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "functions.h"

struct mapping_t Menus[] = {
  {"alias", MENU_ALIAS},
  {"attach", MENU_ATTACH},
  {"browser", MENU_FOLDER},
  {"compose", MENU_COMPOSE},
  {"editor", MENU_EDITOR},
  {"index", MENU_MAIN},
  {"pager", MENU_PAGER},
  {"postpone", MENU_POST},
  {"pgp", MENU_PGP},
  {"smime", MENU_SMIME},

#ifdef HAVE_GPGME
  {"key_select_pgp", MENU_KEY_SELECT_PGP},
  {"key_select_smime", MENU_KEY_SELECT_SMIME},
#endif


#ifdef MIXMASTER
  {"mix", MENU_MIX},
#endif


  {"query", MENU_QUERY},
  {"generic", MENU_GENERIC},
  {NULL, 0}
};

#define mutt_check_menu(s) mutt_getvaluebyname(s, Menus)

static struct mapping_t KeyNames[] = {
  {"<PageUp>", KEY_PPAGE},
  {"<PageDown>", KEY_NPAGE},
  {"<Up>", KEY_UP},
  {"<Down>", KEY_DOWN},
  {"<Right>", KEY_RIGHT},
  {"<Left>", KEY_LEFT},
  {"<Delete>", KEY_DC},
  {"<BackSpace>", KEY_BACKSPACE},
  {"<Insert>", KEY_IC},
  {"<Home>", KEY_HOME},
  {"<End>", KEY_END},
#ifdef KEY_ENTER
  {"<Enter>", KEY_ENTER},
#endif
  {"<Return>", M_ENTER_C},
  {"<Esc>", '\033'},
  {"<Tab>", '\t'},
  {"<Space>", ' '},
#ifdef KEY_BTAB
  {"<BackTab>", KEY_BTAB},
#endif
#ifdef KEY_NEXT
  {"<Next>",    KEY_NEXT},
#endif
  {NULL, 0}
};

/* contains the last key the user pressed */
int LastKey;

struct keymap_t *Keymaps[MENU_MAX];

static struct keymap_t *allocKeys (int len, keycode_t * keys)
{
  struct keymap_t *p;

  p = mem_calloc (1, sizeof (struct keymap_t));
  p->len = len;
  p->keys = mem_malloc (len * sizeof (keycode_t));
  memcpy (p->keys, keys, len * sizeof (keycode_t));
  return (p);
}

static int parse_fkey (char *s)
{
  char *t;
  int n = 0;

  if (s[0] != '<' || ascii_tolower (s[1]) != 'f')
    return -1;

  for (t = s + 2; *t && isdigit ((unsigned char) *t); t++) {
    n *= 10;
    n += *t - '0';
  }

  if (*t != '>')
    return -1;
  else
    return n;
}

/*
 * This function parses the string <NNN> and uses the octal value as the key
 * to bind.
 */
static int parse_keycode (const char *s)
{
  if (isdigit ((unsigned char) s[1]) &&
      isdigit ((unsigned char) s[2]) &&
      isdigit ((unsigned char) s[3]) && s[4] == '>') {
    return (s[3] - '0') + (s[2] - '0') * 8 + (s[1] - '0') * 64;
  }
  return -1;
}

static int parsekeys (char *str, keycode_t * d, int max)
{
  int n, len = max;
  char buff[SHORT_STRING];
  char c;
  char *s, *t;

  strfcpy (buff, str, sizeof (buff));
  s = buff;

  while (*s && len) {
    *d = '\0';
    if (*s == '<' && (t = strchr (s, '>'))) {
      t++;
      c = *t;
      *t = '\0';

      if ((n = mutt_getvaluebyname (s, KeyNames)) != -1) {
        s = t;
        *d = n;
      }
      else if ((n = parse_fkey (s)) > 0) {
        s = t;
        *d = KEY_F (n);
      }
      else if ((n = parse_keycode (s)) > 0) {
        s = t;
        *d = n;
      }

      *t = c;
    }

    if (!*d) {
      *d = (unsigned char) *s;
      s++;
    }
    d++;
    len--;
  }

  return (max - len);
}

/* insert a key sequence into the specified map.  the map is sorted by ASCII
 * value (lowest to highest)
 */
void km_bind (char *s, int menu, int op, char *macro, char *descr)
{
  struct keymap_t *map, *tmp, *last = NULL, *next;
  keycode_t buf[MAX_SEQ];
  int len, pos = 0, lastpos = 0;

  len = parsekeys (s, buf, MAX_SEQ);

  map = allocKeys (len, buf);
  map->op = op;
  map->macro = str_dup (macro);
  map->descr = str_dup (descr);

  tmp = Keymaps[menu];

  while (tmp) {
    if (pos >= len || pos >= tmp->len) {
      /* map and tmp match, but have different lengths, so overwrite */
      do {
        len = tmp->eq;
        next = tmp->next;
        mem_free (&tmp->macro);
        mem_free (&tmp->keys);
        mem_free (&tmp->descr);
        mem_free (&tmp);
        tmp = next;
      }
      while (tmp && len >= pos);
      map->eq = len;
      break;
    }
    else if (buf[pos] == tmp->keys[pos])
      pos++;
    else if (buf[pos] < tmp->keys[pos]) {
      /* found location to insert between last and tmp */
      map->eq = pos;
      break;
    }
    else {                      /* buf[pos] > tmp->keys[pos] */

      last = tmp;
      lastpos = pos;
      if (pos > tmp->eq)
        pos = tmp->eq;
      tmp = tmp->next;
    }
  }

  map->next = tmp;
  if (last) {
    last->next = map;
    last->eq = lastpos;
  }
  else
    Keymaps[menu] = map;
}

void km_bindkey (char *s, int menu, int op)
{
  km_bind (s, menu, op, NULL, NULL);
}

static int get_op (struct binding_t *bindings, const char *start, size_t len)
{
  int i;

  for (i = 0; bindings[i].name; i++) {
    if (!ascii_strncasecmp (start, bindings[i].name, len) &&
        str_len (bindings[i].name) == len)
      return bindings[i].op;
  }

  return OP_NULL;
}

static char *get_func (struct binding_t *bindings, int op)
{
  int i;

  for (i = 0; bindings[i].name; i++) {
    if (bindings[i].op == op) {
      return bindings[i].name;
    }
  }

  return NULL;
}

static void push_string (char *s)
{
  char *pp, *p = s + str_len (s) - 1;
  size_t l;
  int i, op = OP_NULL;

  while (p >= s) {
    /* if we see something like "<PageUp>", look to see if it is a real
       function name and return the corresponding value */
    if (*p == '>') {
      for (pp = p - 1; pp >= s && *pp != '<'; pp--);
      if (pp >= s) {
        if ((i = parse_fkey (pp)) > 0) {
          mutt_ungetch (KEY_F (i), 0);
          p = pp - 1;
          continue;
        }

        l = p - pp + 1;
        for (i = 0; KeyNames[i].name; i++) {
          if (!ascii_strncasecmp (pp, KeyNames[i].name, l))
            break;
        }
        if (KeyNames[i].name) {
          /* found a match */
          mutt_ungetch (KeyNames[i].value, 0);
          p = pp - 1;
          continue;
        }

        /* See if it is a valid command
         * skip the '<' and the '>' when comparing */
        for (i = 0; Menus[i].name; i++) {
          struct binding_t *binding = km_get_table (Menus[i].value);

          if (binding) {
            op = get_op (binding, pp + 1, l - 2);
            if (op != OP_NULL)
              break;
          }
        }

        if (op != OP_NULL) {
          mutt_ungetch (0, op);
          p = pp - 1;
          continue;
        }
      }
    }
    mutt_ungetch ((unsigned char) *p--, 0);
  }
}

static int retry_generic (int menu, keycode_t * keys, int keyslen,
                          int lastkey)
{
  if (menu != MENU_EDITOR && menu != MENU_GENERIC && menu != MENU_PAGER) {
    if (lastkey)
      mutt_ungetch (lastkey, 0);
    for (; keyslen; keyslen--)
      mutt_ungetch (keys[keyslen - 1], 0);
    return (km_dokey (MENU_GENERIC));
  }
  if (menu != MENU_EDITOR) {
    /* probably a good idea to flush input here so we can abort macros */
    mutt_flushinp ();
  }
  return OP_NULL;
}

/* return values:
 *        >0                function to execute
 *        OP_NULL                no function bound to key sequence
 *        -1                error occured while reading input
 */
int km_dokey (int menu)
{
  event_t tmp;
  struct keymap_t *map = Keymaps[menu];
  int pos = 0;
  int n = 0;
  int i;


  if (!map)
    return (retry_generic (menu, NULL, 0, 0));

  FOREVER {
    /* ncurses doesn't return on resized screen when timeout is set to zero */
    if (menu != MENU_EDITOR)
      timeout ((Timeout > 0 ? Timeout : 60) * 1000);

    tmp = mutt_getch ();

    if (menu != MENU_EDITOR)
      timeout (-1);             /* restore blocking operation */

    LastKey = tmp.ch;
    if (LastKey == -1)
      return -1;

    /* do we have an op already? */
    if (tmp.op) {
      char *func = NULL;
      struct binding_t *bindings;

      /* is this a valid op for this menu? */
      if ((bindings = km_get_table (menu)) &&
          (func = get_func (bindings, tmp.op)))
        return tmp.op;

      if (menu == MENU_EDITOR && get_func (OpEditor, tmp.op))
        return tmp.op;

      if (menu != MENU_EDITOR && menu != MENU_PAGER) {
        /* check generic menu */
        bindings = OpGeneric;
        if ((func = get_func (bindings, tmp.op)))
          return tmp.op;
      }

      /* Sigh. Valid function but not in this context.
       * Find the literal string and push it back */
      for (i = 0; Menus[i].name; i++) {
        bindings = km_get_table (Menus[i].value);
        if (bindings) {
          func = get_func (bindings, tmp.op);
          if (func) {
            /* careful not to feed the <..> as one token. otherwise 
             * push_string() will push the bogus op right back! */
            mutt_ungetch ('>', 0);
            push_string (func);
            mutt_ungetch ('<', 0);
            break;
          }
        }
      }
      /* continue to chew */
      if (func)
        continue;
    }

    /* Nope. Business as usual */
    while (LastKey > map->keys[pos]) {
      if (pos > map->eq || !map->next)
        return (retry_generic (menu, map->keys, pos, LastKey));
      map = map->next;
    }

    if (LastKey != map->keys[pos])
      return (retry_generic (menu, map->keys, pos, LastKey));

    if (++pos == map->len) {

      if (map->op != OP_MACRO)
        return map->op;

      if (n++ == 10) {
        mutt_flushinp ();
        mutt_error _("Macro loop detected.");

        return -1;
      }

      push_string (map->macro);
      map = Keymaps[menu];
      pos = 0;
    }
  }

  /* not reached */
}

static void create_bindings (struct binding_t *map, int menu)
{
  int i;

  for (i = 0; map[i].name; i++)
    if (map[i].seq)
      km_bindkey (map[i].seq, menu, map[i].op);
}

char *km_keyname (int c)
{
  static char buf[10];
  char *p;

  if ((p = mutt_getnamebyvalue (c, KeyNames)))
    return p;

  if (c < 256 && c > -128 && iscntrl ((unsigned char) c)) {
    if (c < 0)
      c += 256;

    if (c < 128) {
      buf[0] = '^';
      buf[1] = (c + '@') & 0x7f;
      buf[2] = 0;
    }
    else
      snprintf (buf, sizeof (buf), "\\%d%d%d", c >> 6, (c >> 3) & 7, c & 7);
  }
  else if (c >= KEY_F0 && c < KEY_F (256))      /* this maximum is just a guess */
    sprintf (buf, "<F%d>", c - KEY_F0);
  else if (IsPrint (c))
    snprintf (buf, sizeof (buf), "%c", (unsigned char) c);
  else
    snprintf (buf, sizeof (buf), "\\x%hx", (unsigned short) c);
  return (buf);
}

int km_expand_key (char *s, size_t len, struct keymap_t *map)
{
  size_t l;
  int p = 0;

  if (!map)
    return (0);

  FOREVER {
    strfcpy (s, km_keyname (map->keys[p]), len);
    len -= (l = str_len (s));

    if (++p >= map->len || !len)
      return (1);

    s += l;
  }

  /* not reached */
}

struct keymap_t *km_find_func (int menu, int func)
{
  struct keymap_t *map = Keymaps[menu];

  for (; map; map = map->next)
    if (map->op == func)
      break;
  return (map);
}

void km_init (void)
{
  memset (Keymaps, 0, sizeof (struct keymap_t *) * MENU_MAX);

  create_bindings (OpAttach, MENU_ATTACH);
  create_bindings (OpBrowser, MENU_FOLDER);
  create_bindings (OpCompose, MENU_COMPOSE);
  create_bindings (OpMain, MENU_MAIN);
  create_bindings (OpPager, MENU_PAGER);
  create_bindings (OpPost, MENU_POST);
  create_bindings (OpQuery, MENU_QUERY);
  create_bindings (OpAlias, MENU_ALIAS);


  if ((WithCrypto & APPLICATION_PGP))
    create_bindings (OpPgp, MENU_PGP);

  if ((WithCrypto & APPLICATION_SMIME))
    create_bindings (OpSmime, MENU_SMIME);

#ifdef CRYPT_BACKEND_GPGME
  create_bindings (OpPgp, MENU_KEY_SELECT_PGP);
  create_bindings (OpSmime, MENU_KEY_SELECT_SMIME);
#endif

#ifdef MIXMASTER
  create_bindings (OpMix, MENU_MIX);

  km_bindkey ("<space>", MENU_MIX, OP_GENERIC_SELECT_ENTRY);
  km_bindkey ("h", MENU_MIX, OP_MIX_CHAIN_PREV);
  km_bindkey ("l", MENU_MIX, OP_MIX_CHAIN_NEXT);
#endif

  /* bindings for the line editor */
  create_bindings (OpEditor, MENU_EDITOR);

  km_bindkey ("<up>", MENU_EDITOR, OP_EDITOR_HISTORY_UP);
  km_bindkey ("<down>", MENU_EDITOR, OP_EDITOR_HISTORY_DOWN);
  km_bindkey ("<left>", MENU_EDITOR, OP_EDITOR_BACKWARD_CHAR);
  km_bindkey ("<right>", MENU_EDITOR, OP_EDITOR_FORWARD_CHAR);
  km_bindkey ("<home>", MENU_EDITOR, OP_EDITOR_BOL);
  km_bindkey ("<end>", MENU_EDITOR, OP_EDITOR_EOL);
  km_bindkey ("<backspace>", MENU_EDITOR, OP_EDITOR_BACKSPACE);
  km_bindkey ("<delete>", MENU_EDITOR, OP_EDITOR_BACKSPACE);
  km_bindkey ("\177", MENU_EDITOR, OP_EDITOR_BACKSPACE);

  /* generic menu keymap */
  create_bindings (OpGeneric, MENU_GENERIC);

  km_bindkey ("<home>", MENU_GENERIC, OP_FIRST_ENTRY);
  km_bindkey ("<end>", MENU_GENERIC, OP_LAST_ENTRY);
  km_bindkey ("<pagedown>", MENU_GENERIC, OP_NEXT_PAGE);
  km_bindkey ("<pageup>", MENU_GENERIC, OP_PREV_PAGE);
  km_bindkey ("<right>", MENU_GENERIC, OP_NEXT_PAGE);
  km_bindkey ("<left>", MENU_GENERIC, OP_PREV_PAGE);
  km_bindkey ("<up>", MENU_GENERIC, OP_PREV_ENTRY);
  km_bindkey ("<down>", MENU_GENERIC, OP_NEXT_ENTRY);
  km_bindkey ("1", MENU_GENERIC, OP_JUMP);
  km_bindkey ("2", MENU_GENERIC, OP_JUMP);
  km_bindkey ("3", MENU_GENERIC, OP_JUMP);
  km_bindkey ("4", MENU_GENERIC, OP_JUMP);
  km_bindkey ("5", MENU_GENERIC, OP_JUMP);
  km_bindkey ("6", MENU_GENERIC, OP_JUMP);
  km_bindkey ("7", MENU_GENERIC, OP_JUMP);
  km_bindkey ("8", MENU_GENERIC, OP_JUMP);
  km_bindkey ("9", MENU_GENERIC, OP_JUMP);

  km_bindkey ("<enter>", MENU_GENERIC, OP_GENERIC_SELECT_ENTRY);

  /* Miscellaneous extra bindings */

  km_bindkey (" ", MENU_MAIN, OP_DISPLAY_MESSAGE);
  km_bindkey ("<up>", MENU_MAIN, OP_MAIN_PREV_UNDELETED);
  km_bindkey ("<down>", MENU_MAIN, OP_MAIN_NEXT_UNDELETED);
  km_bindkey ("J", MENU_MAIN, OP_NEXT_ENTRY);
  km_bindkey ("K", MENU_MAIN, OP_PREV_ENTRY);
  km_bindkey ("x", MENU_MAIN, OP_EXIT);

  km_bindkey ("<enter>", MENU_MAIN, OP_DISPLAY_MESSAGE);

  km_bindkey ("x", MENU_PAGER, OP_EXIT);
  km_bindkey ("<backspace>", MENU_PAGER, OP_PREV_LINE);
  km_bindkey ("<pagedown>", MENU_PAGER, OP_NEXT_PAGE);
  km_bindkey ("<pageup>", MENU_PAGER, OP_PREV_PAGE);
  km_bindkey ("<up>", MENU_PAGER, OP_MAIN_PREV_UNDELETED);
  km_bindkey ("<right>", MENU_PAGER, OP_MAIN_NEXT_UNDELETED);
  km_bindkey ("<down>", MENU_PAGER, OP_MAIN_NEXT_UNDELETED);
  km_bindkey ("<left>", MENU_PAGER, OP_MAIN_PREV_UNDELETED);
  km_bindkey ("<home>", MENU_PAGER, OP_PAGER_TOP);
  km_bindkey ("<end>", MENU_PAGER, OP_PAGER_BOTTOM);
  km_bindkey ("1", MENU_PAGER, OP_JUMP);
  km_bindkey ("2", MENU_PAGER, OP_JUMP);
  km_bindkey ("3", MENU_PAGER, OP_JUMP);
  km_bindkey ("4", MENU_PAGER, OP_JUMP);
  km_bindkey ("5", MENU_PAGER, OP_JUMP);
  km_bindkey ("6", MENU_PAGER, OP_JUMP);
  km_bindkey ("7", MENU_PAGER, OP_JUMP);
  km_bindkey ("8", MENU_PAGER, OP_JUMP);
  km_bindkey ("9", MENU_PAGER, OP_JUMP);

  km_bindkey ("<enter>", MENU_PAGER, OP_NEXT_LINE);

  km_bindkey ("<return>", MENU_ALIAS, OP_GENERIC_SELECT_ENTRY);
  km_bindkey ("<enter>", MENU_ALIAS, OP_GENERIC_SELECT_ENTRY);
  km_bindkey ("<space>", MENU_ALIAS, OP_TAG);

  km_bindkey ("<enter>", MENU_ATTACH, OP_VIEW_ATTACH);
  km_bindkey ("<enter>", MENU_COMPOSE, OP_VIEW_ATTACH);

  /* edit-to (default "t") hides generic tag-entry in Compose menu
     This will bind tag-entry to  "T" in the Compose menu */
  km_bindkey ("T", MENU_COMPOSE, OP_TAG);
}

void km_error_key (int menu)
{
  char buf[SHORT_STRING];
  struct keymap_t *key;

  if (!(key = km_find_func (menu, OP_HELP)))
    key = km_find_func (MENU_GENERIC, OP_HELP);

  if (!(km_expand_key (buf, sizeof (buf), key))) {
    mutt_error _("Key is not bound.");

    return;
  }

  /* make sure the key is really the help key in this menu */
  push_string (buf);
  if (km_dokey (menu) != OP_HELP) {
    mutt_error _("Key is not bound.");

    return;
  }

  mutt_error (_("Key is not bound.  Press '%s' for help."), buf);
  return;
}

int mutt_parse_push (BUFFER * buf, BUFFER * s, unsigned long data,
                     BUFFER * err)
{
  int r = 0;

  mutt_extract_token (buf, s, M_TOKEN_CONDENSE);
  if (MoreArgs (s)) {
    strfcpy (err->data, _("push: too many arguments"), err->dsize);
    r = -1;
  }
  else
    push_string (buf->data);
  return (r);
}

/* expects to see: <menu-string>,<menu-string>,... <key-string> */
static char *parse_keymap (int *menu, BUFFER * s, int maxmenus, int *nummenus,
                           BUFFER * err)
{
  BUFFER buf;
  int i = 0;
  char *p, *q;

  memset (&buf, 0, sizeof (buf));

  /* menu name */
  mutt_extract_token (&buf, s, 0);
  p = buf.data;
  if (MoreArgs (s)) {
    while (i < maxmenus) {
      q = strchr (p, ',');
      if (q)
        *q = '\0';

      if ((menu[i] = mutt_check_menu (p)) == -1) {
        snprintf (err->data, err->dsize, _("%s: no such menu"), p);
        goto error;
      }
      ++i;
      if (q)
        p = q + 1;
      else
        break;
    }
    *nummenus = i;
    /* key sequence */
    mutt_extract_token (&buf, s, 0);

    if (!*buf.data) {
      strfcpy (err->data, _("null key sequence"), err->dsize);
    }
    else if (MoreArgs (s))
      return (buf.data);
  }
  else {
    strfcpy (err->data, _("too few arguments"), err->dsize);
  }
error:
  mem_free (&buf.data);
  return (NULL);
}

static int
try_bind (char *key, int menu, char *func, struct binding_t *bindings)
{
  int i;

  for (i = 0; bindings[i].name; i++)
    if (str_cmp (func, bindings[i].name) == 0) {
      km_bindkey (key, menu, bindings[i].op);
      return (0);
    }
  return (-1);
}

struct binding_t *km_get_table (int menu)
{
  switch (menu) {
  case MENU_MAIN:
    return OpMain;
  case MENU_GENERIC:
    return OpGeneric;
  case MENU_COMPOSE:
    return OpCompose;
  case MENU_PAGER:
    return OpPager;
  case MENU_POST:
    return OpPost;
  case MENU_FOLDER:
    return OpBrowser;
  case MENU_ALIAS:
    return OpAlias;
  case MENU_ATTACH:
    return OpAttach;
  case MENU_EDITOR:
    return OpEditor;
  case MENU_QUERY:
    return OpQuery;

  case MENU_PGP:
    return (WithCrypto & APPLICATION_PGP) ? OpPgp : NULL;

#ifdef CRYPT_BACKEND_GPGME
  case MENU_KEY_SELECT_PGP:
    return OpPgp;
  case MENU_KEY_SELECT_SMIME:
    return OpSmime;
#endif

#ifdef MIXMASTER
  case MENU_MIX:
    return OpMix;
#endif

  }
  return NULL;
}

/* bind menu-name '<key_sequence>' function-name */
int mutt_parse_bind (BUFFER * buf, BUFFER * s, unsigned long data,
                     BUFFER * err)
{
  struct binding_t *bindings = NULL;
  char *key;
  int menu[sizeof (Menus) / sizeof (struct mapping_t) - 1], r =
    0, nummenus, i;

  if ((key = parse_keymap (menu, s, sizeof (menu) / sizeof (menu[0]),
                           &nummenus, err)) == NULL)
    return (-1);

  /* function to execute */
  mutt_extract_token (buf, s, 0);
  if (MoreArgs (s)) {
    strfcpy (err->data, _("bind: too many arguments"), err->dsize);
    r = -1;
  }
  else if (ascii_strcasecmp ("noop", buf->data) == 0) {
    for (i = 0; i < nummenus; ++i) {
      km_bindkey (key, menu[i], OP_NULL);       /* the `unbind' command */
    }
  }
  else {
    for (i = 0; i < nummenus; ++i) {
      /* First check the "generic" list of commands */
      if (menu[i] == MENU_PAGER || menu[i] == MENU_EDITOR ||
          menu[i] == MENU_GENERIC ||
          try_bind (key, menu[i], buf->data, OpGeneric) != 0) {
        /* Now check the menu-specific list of commands (if they exist) */
        bindings = km_get_table (menu[i]);
        if (bindings && try_bind (key, menu[i], buf->data, bindings) != 0) {
          snprintf (err->data, err->dsize, _("%s: no such function in map"),
                    buf->data);
          r = -1;
        }
      }
    }
  }
  mem_free (&key);
  return (r);
}

/* macro <menu> <key> <macro> <description> */
int mutt_parse_macro (BUFFER * buf, BUFFER * s, unsigned long data,
                      BUFFER * err)
{
  int menu[sizeof (Menus) / sizeof (struct mapping_t) - 1], r =
    -1, nummenus, i;
  char *seq = NULL;
  char *key;

  if ((key =
       parse_keymap (menu, s, sizeof (menu) / sizeof (menu[0]), &nummenus,
                     err)) == NULL)
    return (-1);

  mutt_extract_token (buf, s, M_TOKEN_CONDENSE);
  /* make sure the macro sequence is not an empty string */
  if (!*buf->data) {
    strfcpy (err->data, _("macro: empty key sequence"), err->dsize);
  }
  else {
    if (MoreArgs (s)) {
      seq = str_dup (buf->data);
      mutt_extract_token (buf, s, M_TOKEN_CONDENSE);

      if (MoreArgs (s)) {
        strfcpy (err->data, _("macro: too many arguments"), err->dsize);
      }
      else {
        for (i = 0; i < nummenus; ++i) {
          km_bind (key, menu[i], OP_MACRO, seq, buf->data);
          r = 0;
        }
      }

      mem_free (&seq);
    }
    else {
      for (i = 0; i < nummenus; ++i) {
        km_bind (key, menu[i], OP_MACRO, buf->data, NULL);
        r = 0;
      }
    }
  }
  mem_free (&key);
  return (r);
}

/* exec function-name */
int mutt_parse_exec (BUFFER * buf, BUFFER * s, unsigned long data,
                     BUFFER * err)
{
  int ops[128];
  int nops = 0;
  struct binding_t *bindings = NULL;
  char *function;

  if (!MoreArgs (s)) {
    strfcpy (err->data, _("exec: no arguments"), err->dsize);
    return (-1);
  }

  do {
    mutt_extract_token (buf, s, 0);
    function = buf->data;

    if ((bindings = km_get_table (CurrentMenu)) == NULL
        && CurrentMenu != MENU_PAGER)
      bindings = OpGeneric;

    ops[nops] = get_op (bindings, function, str_len (function));
    if (ops[nops] == OP_NULL && CurrentMenu != MENU_PAGER)
      ops[nops] = get_op (OpGeneric, function, str_len (function));

    if (ops[nops] == OP_NULL) {
      mutt_flushinp ();
      mutt_error (_("%s: no such function"), function);
      return (-1);
    }
    nops++;
  }
  while (MoreArgs (s) && nops < sizeof (ops) / sizeof (ops[0]));

  while (nops)
    mutt_ungetch (0, ops[--nops]);

  return 0;
}

/*
 * prompts the user to enter a keystroke, and displays the octal value back
 * to the user.
 */
void mutt_what_key (void)
{
  int ch;

  mvprintw (LINES - 1, 0, _("Enter keys (^G to abort): "));
  do {
    ch = getch ();
    if (ch != ERR && ch != ctrl ('G')) {
      mutt_message (_("Char = %s, Octal = %o, Decimal = %d"),
                    km_keyname (ch), ch, ch);
    }
  }
  while (ch != ERR && ch != ctrl ('G'));

  mutt_flushinp ();
}


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