* extfs/uarj.in (mcarjfs_copyout): Use the regular extract command,

[midnight-commander.git] / edit / editcmd.c

/* editor high level editing commands.

   Copyright (C) 1996, 1997 the Free Software Foundation

   Authors: 1996, 1997 Paul Sheer

   This program 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 of the License, or
   (at your option) any later version.

   This program 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 this program; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307, USA.

*/

/* #define PIPE_BLOCKS_SO_READ_BYTE_BY_BYTE */

#include <config.h>
#include <ctype.h>

#include <stdio.h>
#include <stdarg.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <sys/stat.h>
#include <errno.h>

#include <stdlib.h>

#include "../src/global.h"

#include "edit.h"
#include "editlock.h"
#include "editcmddef.h"
#include "edit-widget.h"

#include "../src/color.h"       /* dialog_colors */
#include "../src/tty.h"         /* LINES */
#include "../src/widget.h"      /* listbox_new() */
#include "../src/layout.h"      /* clr_scr() */
#include "../src/main.h"        /* mc_home */
#include "../src/help.h"        /* interactive_display() */
#include "../src/key.h"         /* XCTRL */
#include "../src/dialog.h"      /* do_refresh() */
#include "../src/wtools.h"      /* message() */
#include "../src/charsets.h"

#define edit_get_load_file(f,h) input_expand_dialog (h, _(" Enter file name: "), f)
#define edit_get_save_file(f,h) input_expand_dialog (h, _(" Enter file name: "), f)

struct selection {
   unsigned char * text;
   int len;
};

/* globals: */

/* search and replace: */
static int replace_scanf = 0;
static int replace_regexp = 0;
static int replace_all = 0;
static int replace_prompt = 1;
static int replace_whole = 0;
static int replace_case = 0;
static int replace_backwards = 0;
static int search_create_bookmark = 0;

/* queries on a save */
int edit_confirm_save = 1;

#define NUM_REPL_ARGS 64
#define MAX_REPL_LEN 1024

static int edit_save_cmd (WEdit *edit);
static unsigned char *edit_get_block (WEdit *edit, long start,
                                      long finish, int *l);

static inline int my_lower_case (int c)
{
    return tolower(c & 0xFF);
}

static const char *strcasechr (const unsigned char *s, int c)
{
    for (c = my_lower_case (c); my_lower_case ((int) *s) != c; ++s)
        if (*s == '\0')
            return 0;
    return (const char *) s;
}

#ifndef HAVE_MEMMOVE
/* for Christophe */
static void *memmove (void *dest, const void *src, size_t n)
{
    char *t;
    const char *s;

    if (dest <= src) {
        t = (char *) dest;
        s = (const char *) src;
        while (n--)
            *t++ = *s++;
    } else {
        t = (char *) dest + n;
        s = (const char *) src + n;
        while (n--)
            *--t = *--s;
    }
    return dest;
}
#endif /* !HAVE_MEMMOVE */

/* #define itoa MY_itoa  <---- this line is now in edit.h */
static char *
MY_itoa (int i)
{
    static char t[14];
    char *s = t + 13;
    int j = i;
    *s-- = 0;
    do {
        *s-- = i % 10 + '0';
    } while ((i = i / 10));
    if (j < 0)
        *s-- = '-';
    return ++s;
}

/* Temporary strings */
static char *stacked[16];

/*
   This joins strings end on end and allocates memory for the result.
   The result is later automatically free'd and must not be free'd
   by the caller.
 */
static const char *
catstrs (const char *first,...)
{
    static int i = 0;
    va_list ap;
    int len;
    char *data;

    if (!first)
        return 0;

    len = strlen (first);
    va_start (ap, first);

    while ((data = va_arg (ap, char *)) != 0)
         len += strlen (data);

    len++;

    i = (i + 1) % 16;
    g_free (stacked[i]);

    stacked[i] = g_malloc (len);
    va_end (ap);
    va_start (ap, first);
    strcpy (stacked[i], first);
    while ((data = va_arg (ap, char *)) != 0)
         strcat (stacked[i], data);
    va_end (ap);

    return stacked[i];
}

/* Free temporary strings */
void freestrs(void)
{
    size_t i;

    for (i = 0; i < sizeof(stacked) / sizeof(stacked[0]); i++) {
        g_free (stacked[i]);
        stacked[i] = NULL;
    }
}

void edit_help_cmd (WEdit * edit)
{
    interactive_display (NULL, "[Internal File Editor]");
    edit->force |= REDRAW_COMPLETELY;
}

void edit_refresh_cmd (WEdit * edit)
{
#ifndef HAVE_SLANG
    clr_scr();
    do_refresh();
#else
    {
        int color;
        edit_get_syntax_color (edit, -1, &color);
    }
    touchwin(stdscr);
#endif /* !HAVE_SLANG */
    mc_refresh();
    doupdate();
}

/*  If 0 (quick save) then  a) create/truncate <filename> file,
                            b) save to <filename>;
    if 1 (safe save) then   a) save to <tempnam>,
                            b) rename <tempnam> to <filename>;
    if 2 (do backups) then  a) save to <tempnam>,
                            b) rename <filename> to <filename.backup_ext>,
                            c) rename <tempnam> to <filename>. */

/* returns 0 on error */
static int
edit_save_file (WEdit *edit, const char *filename)
{
    char *p;
    long filelen = 0;
    char *savename = 0;
    int this_save_mode, fd;

    if (!filename)
        return 0;
    if (!*filename)
        return 0;

    if (*filename != PATH_SEP && edit->dir) {
        savename = concat_dir_and_file (edit->dir, filename);
        filename = catstrs (savename, (char *) NULL);
        g_free (savename);
    }

    if (!vfs_file_is_local (filename) ||
        (fd = mc_open (filename, O_WRONLY | O_BINARY)) == -1) {
        /*
         * The file does not exists yet, so no safe save or
         * backup are necessary.
         */
        this_save_mode = EDIT_QUICK_SAVE;
    } else {
        mc_close (fd);
        this_save_mode = option_save_mode;
    }

    if (this_save_mode != EDIT_QUICK_SAVE) {
        char *savedir, *saveprefix;
        const char *slashpos;
        slashpos = strrchr (filename, PATH_SEP);
        if (slashpos) {
            savedir = g_strdup (filename);
            savedir[slashpos - filename + 1] = '\0';
        } else
            savedir = g_strdup (".");
        saveprefix = concat_dir_and_file (savedir, "cooledit");
        g_free (savedir);
        fd = mc_mkstemps (&savename, saveprefix, NULL);
        g_free (saveprefix);
        if (!savename)
            return 0;
        /* FIXME:
         * Close for now because mc_mkstemps use pure open system call
         * to create temporary file and it needs to be reopened by
         * VFS-aware mc_open().
         */
        close (fd);
    } else
        savename = g_strdup (filename);

    mc_chown (savename, edit->stat1.st_uid, edit->stat1.st_gid);
    mc_chmod (savename, edit->stat1.st_mode);

    if ((fd =
         mc_open (savename, O_CREAT | O_WRONLY | O_TRUNC | O_BINARY,
                  edit->stat1.st_mode)) == -1)
        goto error_save;

/* pipe save */
    if ((p = edit_get_write_filter (savename, filename))) {
        FILE *file;

        mc_close (fd);
        file = (FILE *) popen (p, "w");

        if (file) {
            filelen = edit_write_stream (edit, file);
#if 1
            pclose (file);
#else
            if (pclose (file) != 0) {
                edit_error_dialog (_("Error"),
                                   catstrs (_(" Error writing to pipe: "),
                                            p, " ", (char *) NULL));
                g_free (p);
                goto error_save;
            }
#endif
        } else {
            edit_error_dialog (_("Error"),
                               get_sys_error (catstrs
                                              (_
                                               (" Cannot open pipe for writing: "),
                                               p, " ", (char *) NULL)));
            g_free (p);
            goto error_save;
        }
        g_free (p);
    } else {
        long buf;
        buf = 0;
        filelen = edit->last_byte;
        while (buf <= (edit->curs1 >> S_EDIT_BUF_SIZE) - 1) {
            if (mc_write (fd, (char *) edit->buffers1[buf], EDIT_BUF_SIZE)
                != EDIT_BUF_SIZE) {
                mc_close (fd);
                goto error_save;
            }
            buf++;
        }
        if (mc_write
            (fd, (char *) edit->buffers1[buf],
             edit->curs1 & M_EDIT_BUF_SIZE) !=
            (edit->curs1 & M_EDIT_BUF_SIZE)) {
            filelen = -1;
        } else if (edit->curs2) {
            edit->curs2--;
            buf = (edit->curs2 >> S_EDIT_BUF_SIZE);
            if (mc_write
                (fd,
                 (char *) edit->buffers2[buf] + EDIT_BUF_SIZE -
                 (edit->curs2 & M_EDIT_BUF_SIZE) - 1,
                 1 + (edit->curs2 & M_EDIT_BUF_SIZE)) !=
                1 + (edit->curs2 & M_EDIT_BUF_SIZE)) {
                filelen = -1;
            } else {
                while (--buf >= 0) {
                    if (mc_write
                        (fd, (char *) edit->buffers2[buf],
                         EDIT_BUF_SIZE) != EDIT_BUF_SIZE) {
                        filelen = -1;
                        break;
                    }
                }
            }
            edit->curs2++;
        }
        if (mc_close (fd))
            goto error_save;
    }

    if (filelen != edit->last_byte)
        goto error_save;
    if (this_save_mode == EDIT_DO_BACKUP)
        if (mc_rename (filename, catstrs (filename, option_backup_ext, (char *) NULL))
            == -1)
            goto error_save;
    if (this_save_mode != EDIT_QUICK_SAVE)
        if (mc_rename (savename, filename) == -1)
            goto error_save;
    g_free (savename);
    return 1;
  error_save:
/*  FIXME: Is this safe ?
 *  if (this_save_mode != EDIT_QUICK_SAVE)
 *      mc_unlink (savename);
 */
    g_free (savename);
    return 0;
}

/*
   I changed this from Oleg's original routine so
   that option_backup_ext works with coolwidgets as well. This
   does mean there is a memory leak - paul.
 */
void menu_save_mode_cmd (void)
{
#define DLG_X 38
#define DLG_Y 10
    static char *str_result;
    static int save_mode_new;
    static const char *str[] =
    {
        N_("Quick save "),
        N_("Safe save "),
        N_("Do backups -->")};
    static QuickWidget widgets[] =
    {
        {quick_button, 18, DLG_X, 7, DLG_Y, N_("&Cancel"), 0,
         B_CANCEL, 0, 0, "c"},
        {quick_button, 6, DLG_X, 7, DLG_Y, N_("&OK"), 0,
         B_ENTER, 0, 0, "o"},
        {quick_input, 23, DLG_X, 5, DLG_Y, 0, 9,
         0, 0, &str_result, "edit-backup-ext"},
        {quick_label, 22, DLG_X, 4, DLG_Y, N_("Extension:"), 0,
         0, 0, 0, "savemext"},
        {quick_radio, 4, DLG_X, 3, DLG_Y, "", 3,
         0, &save_mode_new, (char **) str, "t"},
        NULL_QuickWidget};
    static QuickDialog dialog =
    {DLG_X, DLG_Y, -1, -1, N_(" Edit Save Mode "), "[Edit Save Mode]",
     widgets, 0};
    static int i18n_flag = 0;

    if (!i18n_flag) {
        size_t i;
        size_t maxlen = 0;
        int dlg_x;
        size_t l1;

        /* OK/Cancel buttons */
        l1 = strlen (_(widgets[0].text)) + strlen (_(widgets[1].text)) + 5;
        maxlen = max (maxlen, l1);

        for (i = 0; i < 3; i++ ) {
            str[i] = _(str[i]);
            maxlen = max (maxlen, strlen (str[i]) + 7);
        }
        i18n_flag = 1;

        dlg_x = maxlen + strlen (_(widgets[3].text)) + 5 + 1;
        widgets[2].hotkey_pos = strlen (_(widgets[3].text)); /* input field length */
        dlg_x = min (COLS, dlg_x);
        dialog.xlen = dlg_x;

        i = (dlg_x - l1)/3;
        widgets[1].relative_x = i;
        widgets[0].relative_x = i + strlen (_(widgets[1].text)) + i + 4;

        widgets[2].relative_x = widgets[3].relative_x = maxlen + 2;

        for (i = 0; i < sizeof (widgets)/sizeof (widgets[0]); i++)
                widgets[i].x_divisions = dlg_x;
    }

    widgets[2].text = option_backup_ext;
    widgets[4].value = option_save_mode;
    if (quick_dialog (&dialog) != B_ENTER)
        return;
    option_save_mode = save_mode_new;
    option_backup_ext = str_result;     /* this is a memory leak */
    option_backup_ext_int = 0;
    str_result[min (strlen (str_result), sizeof (int))] = '\0';
    memcpy (&option_backup_ext_int, str_result, strlen (option_backup_ext));
}

void
edit_set_filename (WEdit *edit, const char *f)
{
    g_free (edit->filename);
    if (!f)
        f = "";
    edit->filename = g_strdup (f);
    if (edit->dir == NULL && *f != PATH_SEP)
#ifdef USE_VFS
        edit->dir = g_strdup (vfs_get_current_dir ());
#else
        edit->dir = g_get_current_dir ();
#endif
}

/* Here we want to warn the users of overwriting an existing file,
   but only if they have made a change to the filename */
/* returns 1 on success */
int
edit_save_as_cmd (WEdit *edit)
{
    /* This heads the 'Save As' dialog box */
    char *exp;
    int save_lock = 0;
    int different_filename = 0;

    exp = edit_get_save_file (edit->filename, _(" Save As "));
    edit_push_action (edit, KEY_PRESS + edit->start_display);

    if (exp) {
        if (!*exp) {
            g_free (exp);
            edit->force |= REDRAW_COMPLETELY;
            return 0;
        } else {
            if (strcmp (edit->filename, exp)) {
                int file;
                different_filename = 1;
                if ((file = mc_open (exp, O_RDONLY | O_BINARY)) != -1) {
                    /* the file exists */
                    mc_close (file);
                    /* Overwrite the current file or cancel the operation */
                    if (edit_query_dialog2
                        (_("Warning"),
                         _(" A file already exists with this name. "),
                         _("&Overwrite"), _("&Cancel"))) {
                        edit->force |= REDRAW_COMPLETELY;
                        g_free (exp);
                        return 0;
                    }
                }
                save_lock = edit_lock_file (exp);
            } else {
                /* filenames equal, check if already locked */
                if (!edit->locked && !edit->delete_file)
                    save_lock = edit_lock_file (exp);
            }

            if (edit_save_file (edit, exp)) {
                /* Succesful, so unlock both files */
                if (strcmp (edit->filename, exp)) {
                    if (save_lock)
                        edit_unlock_file (exp);
                    if (edit->locked)
                        edit->locked = edit_unlock_file (edit->filename);
                } else {
                    if (edit->locked || save_lock)
                        edit->locked = edit_unlock_file (edit->filename);
                }

                edit_set_filename (edit, exp);
                g_free (exp);
                edit->modified = 0;
                edit->delete_file = 0;
                if (different_filename)
                    edit_load_syntax (edit, 0, 0);
                edit->force |= REDRAW_COMPLETELY;
                return 1;
            } else {
                /* Failed, so maintain modify (not save) lock */
                if (strcmp (edit->filename, exp) && save_lock)
                    edit_unlock_file (exp);
                if (save_lock)
                    edit->locked = edit_unlock_file (edit->filename);
                g_free (exp);
                edit_error_dialog (_(" Save As "),
                                   get_sys_error (_
                                                  (" Cannot save file. ")));
                edit->force |= REDRAW_COMPLETELY;
                return 0;
            }
        }
    }
    edit->force |= REDRAW_COMPLETELY;
    return 0;
}

/* {{{ Macro stuff starts here */

static cb_ret_t
raw_callback (struct Dlg_head *h, dlg_msg_t msg, int parm)
{
    switch (msg) {
    case DLG_KEY:
        h->running = 0;
        h->ret_value = parm;
        return MSG_HANDLED;
    default:
        return default_dlg_callback (h, msg, parm);
    }
}

/* gets a raw key from the keyboard. Passing cancel = 1 draws
   a cancel button thus allowing c-c etc.  Alternatively, cancel = 0
   will return the next key pressed.  ctrl-a (=B_CANCEL), ctrl-g, ctrl-c,
   and Esc are cannot returned */
int
edit_raw_key_query (const char *heading, const char *query, int cancel)
{
    int w = strlen (query) + 7;
    struct Dlg_head *raw_dlg =
        create_dlg (0, 0, 7, w, dialog_colors, raw_callback,
                    NULL, heading,
                    DLG_CENTER | DLG_TRYUP | DLG_WANT_TAB);
    add_widget (raw_dlg,
                input_new (3 - cancel, w - 5, INPUT_COLOR, 2, "", 0));
    add_widget (raw_dlg, label_new (3 - cancel, 2, query));
    if (cancel)
        add_widget (raw_dlg,
                    button_new (4, w / 2 - 5, B_CANCEL, NORMAL_BUTTON,
                                _("Cancel"), 0));
    run_dlg (raw_dlg);
    w = raw_dlg->ret_value;
    destroy_dlg (raw_dlg);
    if (cancel) {
        if (w == XCTRL ('g') || w == XCTRL ('c') || w == ESC_CHAR
            || w == B_CANCEL)
            return 0;
    }

    return w;
}

/* creates a macro file if it doesn't exist */
static FILE *edit_open_macro_file (const char *r)
{
    const char *filename;
    int file;
    filename = catstrs (home_dir, MACRO_FILE, (char *) NULL);
    if ((file = open (filename, O_CREAT | O_RDWR, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) == -1)
        return 0;
    close (file);
    return fopen (filename, r);
}

#define MAX_MACROS 1024
static int saved_macro[MAX_MACROS + 1];
static int saved_macros_loaded = 0;

/*
   This is just to stop the macro file be loaded over and over for keys
   that aren't defined to anything. On slow systems this could be annoying.
 */
static int
macro_exists (int k)
{
    int i;
    for (i = 0; i < MAX_MACROS && saved_macro[i]; i++)
        if (saved_macro[i] == k)
            return i;
    return -1;
}

/* returns 1 on error */
static int
edit_delete_macro (WEdit * edit, int k)
{
    struct macro macro[MAX_MACRO_LENGTH];
    FILE *f, *g;
    int s, i, n, j = 0;

    (void) edit;

    if (saved_macros_loaded)
        if ((j = macro_exists (k)) < 0)
            return 0;
    g = fopen (catstrs (home_dir, TEMP_FILE, (char *) NULL), "w");
    if (!g) {
        edit_error_dialog (_(" Delete macro "),
                 get_sys_error (_(" Cannot open temp file ")));
        return 1;
    }
    f = edit_open_macro_file ("r");
    if (!f) {
        edit_error_dialog (_(" Delete macro "),
                get_sys_error (_(" Cannot open macro file ")));
        fclose (g);
        return 1;
    }
    for (;;) {
        n = fscanf (f, ("key '%d 0': "), &s);
        if (!n || n == EOF)
            break;
        n = 0;
        while (fscanf (f, "%hd %hd, ", &macro[n].command, &macro[n].ch))
            n++;
        fscanf (f, ";\n");
        if (s != k) {
            fprintf (g, ("key '%d 0': "), s);
            for (i = 0; i < n; i++)
                fprintf (g, "%hd %hd, ", macro[i].command, macro[i].ch);
            fprintf (g, ";\n");
        }
    }
    fclose (f);
    fclose (g);
    if (rename (catstrs (home_dir, TEMP_FILE, (char *) NULL), catstrs (home_dir, MACRO_FILE, (char *) NULL)) == -1) {
        edit_error_dialog (_(" Delete macro "),
           get_sys_error (_(" Cannot overwrite macro file ")));
        return 1;
    }
    if (saved_macros_loaded)
        memmove (saved_macro + j, saved_macro + j + 1, sizeof (int) * (MAX_MACROS - j - 1));
    return 0;
}

/* returns 0 on error */
int edit_save_macro_cmd (WEdit * edit, struct macro macro[], int n)
{
    FILE *f;
    int s, i;

    edit_push_action (edit, KEY_PRESS + edit->start_display);
    s = edit_raw_key_query (_(" Save macro "),
        _(" Press the macro's new hotkey: "), 1);
    edit->force |= REDRAW_COMPLETELY;
    if (s) {
        if (edit_delete_macro (edit, s))
            return 0;
        f = edit_open_macro_file ("a+");
        if (f) {
            fprintf (f, ("key '%d 0': "), s);
            for (i = 0; i < n; i++)
                fprintf (f, "%hd %hd, ", macro[i].command, macro[i].ch);
            fprintf (f, ";\n");
            fclose (f);
            if (saved_macros_loaded) {
                for (i = 0; i < MAX_MACROS && saved_macro[i]; i++);
                saved_macro[i] = s;
            }
            return 1;
        } else
            edit_error_dialog (_(" Save macro "), get_sys_error (_(" Cannot open macro file ")));
    }
    return 0;
}

void edit_delete_macro_cmd (WEdit * edit)
{
    int command;

    command = edit_raw_key_query (_ (" Delete macro "),
                                  _ (" Press macro hotkey: "), 1);

    if (!command)
        return;

    edit_delete_macro (edit, command);
}

/* return 0 on error */
int edit_load_macro_cmd (WEdit * edit, struct macro macro[], int *n, int k)
{
    FILE *f;
    int s, i = 0, found = 0;

    (void) edit;

    if (saved_macros_loaded)
        if (macro_exists (k) < 0)
            return 0;

    if ((f = edit_open_macro_file ("r"))) {
        struct macro dummy;
        do {
            int u;
            u = fscanf (f, ("key '%d 0': "), &s);
            if (!u || u == EOF)
                break;
            if (!saved_macros_loaded)
                saved_macro[i++] = s;
            if (!found) {
                *n = 0;
                while (*n < MAX_MACRO_LENGTH && 2 == fscanf (f, "%hd %hd, ", &macro[*n].command, &macro[*n].ch))
                    (*n)++;
            } else {
                while (2 == fscanf (f, "%hd %hd, ", &dummy.command, &dummy.ch));
            }
            fscanf (f, ";\n");
            if (s == k)
                found = 1;
        } while (!found || !saved_macros_loaded);
        if (!saved_macros_loaded) {
            saved_macro[i] = 0;
            saved_macros_loaded = 1;
        }
        fclose (f);
        return found;
    } else
        edit_error_dialog (_(" Load macro "),
                get_sys_error (_(" Cannot open macro file ")));
    return 0;
}

/* }}} Macro stuff starts here */

/* returns 1 on success */
int edit_save_confirm_cmd (WEdit * edit)
{
    const char *f;

    if (edit_confirm_save) {
        f = catstrs (_(" Confirm save file? : "), edit->filename, " ", (char *) NULL);
        if (edit_query_dialog2 (_(" Save file "), f, _("&Save"), _("&Cancel")))
            return 0;
    }
    return edit_save_cmd (edit);
}


/* returns 1 on success */
static int
edit_save_cmd (WEdit *edit)
{
    int res, save_lock = 0;

    if (!edit->locked && !edit->delete_file)
        save_lock = edit_lock_file (edit->filename);
    res = edit_save_file (edit, edit->filename);

    /* Maintain modify (not save) lock on failure */
    if ((res && edit->locked) || save_lock)
        edit->locked = edit_unlock_file (edit->filename);

    /* On failure try 'save as', it does locking on its own */
    if (!res)
        return edit_save_as_cmd (edit);
    edit->force |= REDRAW_COMPLETELY;
    edit->delete_file = 0;
    edit->modified = 0;

    return 1;
}


/* returns 1 on success */
int edit_new_cmd (WEdit * edit)
{
    if (edit->modified) {
        if (edit_query_dialog2 (_ ("Warning"), _ (" Current text was modified without a file save. \n Continue discards these changes. "), _ ("C&ontinue"), _ ("&Cancel"))) {
            edit->force |= REDRAW_COMPLETELY;
            return 0;
        }
    }
    edit->force |= REDRAW_COMPLETELY;

    if (edit->locked)
        edit->locked = edit_unlock_file (edit->filename);
    return edit_renew (edit);   /* if this gives an error, something has really screwed up */
}

/* returns 1 on error */
static int
edit_load_file_from_filename (WEdit * edit, char *exp)
{
    int prev_locked = edit->locked;
    char *prev_filename = g_strdup (edit->filename);

    if (!edit_reload (edit, exp)) {
        g_free (prev_filename);
        return 1;
    }

    if (prev_locked)
        edit_unlock_file (prev_filename);
    g_free (prev_filename);
    return 0;
}

int
edit_load_cmd (WEdit *edit)
{
    char *exp;

    if (edit->modified) {
        if (edit_query_dialog2
            (_("Warning"),
             _(" Current text was modified without a file save. \n"
               " Continue discards these changes. "), _("C&ontinue"),
             _("&Cancel"))) {
            edit->force |= REDRAW_COMPLETELY;
            return 0;
        }
    }

    exp = edit_get_load_file (edit->filename, _(" Load "));

    if (exp) {
        if (*exp)
            edit_load_file_from_filename (edit, exp);
        g_free (exp);
    }
    edit->force |= REDRAW_COMPLETELY;
    return 0;
}

/*
   if mark2 is -1 then marking is from mark1 to the cursor.
   Otherwise its between the markers. This handles this.
   Returns 1 if no text is marked.
 */
int eval_marks (WEdit * edit, long *start_mark, long *end_mark)
{
    if (edit->mark1 != edit->mark2) {
        if (edit->mark2 >= 0) {
            *start_mark = min (edit->mark1, edit->mark2);
            *end_mark = max (edit->mark1, edit->mark2);
        } else {
            *start_mark = min (edit->mark1, edit->curs1);
            *end_mark = max (edit->mark1, edit->curs1);
            edit->column2 = edit->curs_col;
        }
        return 0;
    } else {
        *start_mark = *end_mark = 0;
        edit->column2 = edit->column1 = 0;
        return 1;
    }
}

#define space_width 1

static void
edit_insert_column_of_text (WEdit * edit, unsigned char *data, int size, int width)
{
    long cursor;
    int i, col;
    cursor = edit->curs1;
    col = edit_get_col (edit);
    for (i = 0; i < size; i++) {
        if (data[i] == '\n') {  /* fill in and move to next line */
            int l;
            long p;
            if (edit_get_byte (edit, edit->curs1) != '\n') {
                l = width - (edit_get_col (edit) - col);
                while (l > 0) {
                    edit_insert (edit, ' ');
                    l -= space_width;
                }
            }
            for (p = edit->curs1;; p++) {
                if (p == edit->last_byte) {
                    edit_cursor_move (edit, edit->last_byte - edit->curs1);
                    edit_insert_ahead (edit, '\n');
                    p++;
                    break;
                }
                if (edit_get_byte (edit, p) == '\n') {
                    p++;
                    break;
                }
            }
            edit_cursor_move (edit, edit_move_forward3 (edit, p, col, 0) - edit->curs1);
            l = col - edit_get_col (edit);
            while (l >= space_width) {
                edit_insert (edit, ' ');
                l -= space_width;
            }
            continue;
        }
        edit_insert (edit, data[i]);
    }
    edit_cursor_move (edit, cursor - edit->curs1);
}


void
edit_block_copy_cmd (WEdit *edit)
{
    long start_mark, end_mark, current = edit->curs1;
    int size, x;
    unsigned char *copy_buf;

    edit_update_curs_col (edit);
    x = edit->curs_col;
    if (eval_marks (edit, &start_mark, &end_mark))
        return;
    if (column_highlighting)
        if ((x >= edit->column1 && x < edit->column2)
            || (x > edit->column2 && x <= edit->column1))
            return;

    copy_buf = edit_get_block (edit, start_mark, end_mark, &size);

    /* all that gets pushed are deletes hence little space is used on the stack */

    edit_push_markers (edit);

    if (column_highlighting) {
        edit_insert_column_of_text (edit, copy_buf, size,
                                    abs (edit->column2 - edit->column1));
    } else {
        while (size--)
            edit_insert_ahead (edit, copy_buf[size]);
    }

    g_free (copy_buf);
    edit_scroll_screen_over_cursor (edit);

    if (column_highlighting) {
        edit_set_markers (edit, 0, 0, 0, 0);
        edit_push_action (edit, COLUMN_ON);
        column_highlighting = 0;
    } else if (start_mark < current && end_mark > current)
        edit_set_markers (edit, start_mark,
                          end_mark + end_mark - start_mark, 0, 0);

    edit->force |= REDRAW_PAGE;
}


void
edit_block_move_cmd (WEdit *edit)
{
    long count;
    long current;
    unsigned char *copy_buf;
    long start_mark, end_mark;
    int deleted = 0;
    int x = 0;

    if (eval_marks (edit, &start_mark, &end_mark))
        return;
    if (column_highlighting) {
        edit_update_curs_col (edit);
        x = edit->curs_col;
        if (start_mark <= edit->curs1 && end_mark >= edit->curs1)
            if ((x > edit->column1 && x < edit->column2)
                || (x > edit->column2 && x < edit->column1))
                return;
    } else if (start_mark <= edit->curs1 && end_mark >= edit->curs1)
        return;

    if ((end_mark - start_mark) > option_max_undo / 2)
        if (edit_query_dialog2
            (_("Warning"),
             _
             (" Block is large, you may not be able to undo this action. "),
             _("C&ontinue"), _("&Cancel")))
            return;

    edit_push_markers (edit);
    current = edit->curs1;
    if (column_highlighting) {
        int size, c1, c2, line;
        line = edit->curs_line;
        if (edit->mark2 < 0)
            edit_mark_cmd (edit, 0);
        c1 = min (edit->column1, edit->column2);
        c2 = max (edit->column1, edit->column2);
        copy_buf = edit_get_block (edit, start_mark, end_mark, &size);
        if (x < c2) {
            edit_block_delete_cmd (edit);
            deleted = 1;
        }
        edit_move_to_line (edit, line);
        edit_cursor_move (edit,
                          edit_move_forward3 (edit,
                                              edit_bol (edit, edit->curs1),
                                              x, 0) - edit->curs1);
        edit_insert_column_of_text (edit, copy_buf, size, c2 - c1);
        if (!deleted) {
            line = edit->curs_line;
            edit_update_curs_col (edit);
            x = edit->curs_col;
            edit_block_delete_cmd (edit);
            edit_move_to_line (edit, line);
            edit_cursor_move (edit,
                              edit_move_forward3 (edit,
                                                  edit_bol (edit,
                                                            edit->curs1),
                                                  x, 0) - edit->curs1);
        }
        edit_set_markers (edit, 0, 0, 0, 0);
        edit_push_action (edit, COLUMN_ON);
        column_highlighting = 0;
    } else {
        copy_buf = g_malloc (end_mark - start_mark);
        edit_cursor_move (edit, start_mark - edit->curs1);
        edit_scroll_screen_over_cursor (edit);
        count = start_mark;
        while (count < end_mark) {
            copy_buf[end_mark - count - 1] = edit_delete (edit);
            count++;
        }
        edit_scroll_screen_over_cursor (edit);
        edit_cursor_move (edit,
                          current - edit->curs1 -
                          (((current - edit->curs1) >
                            0) ? end_mark - start_mark : 0));
        edit_scroll_screen_over_cursor (edit);
        while (count-- > start_mark)
            edit_insert_ahead (edit, copy_buf[end_mark - count - 1]);
        edit_set_markers (edit, edit->curs1,
                          edit->curs1 + end_mark - start_mark, 0, 0);
    }
    edit_scroll_screen_over_cursor (edit);
    g_free (copy_buf);
    edit->force |= REDRAW_PAGE;
}

static void
edit_delete_column_of_text (WEdit * edit)
{
    long p, q, r, m1, m2;
    int b, c, d;
    int n;

    eval_marks (edit, &m1, &m2);
    n = edit_move_forward (edit, m1, 0, m2) + 1;
    c = edit_move_forward3 (edit, edit_bol (edit, m1), 0, m1);
    d = edit_move_forward3 (edit, edit_bol (edit, m2), 0, m2);

    b = min (c, d);
    c = max (c, d);

    while (n--) {
        r = edit_bol (edit, edit->curs1);
        p = edit_move_forward3 (edit, r, b, 0);
        q = edit_move_forward3 (edit, r, c, 0);
        if (p < m1)
            p = m1;
        if (q > m2)
            q = m2;
        edit_cursor_move (edit, p - edit->curs1);
        while (q > p) {         /* delete line between margins */
            if (edit_get_byte (edit, edit->curs1) != '\n')
                edit_delete (edit);
            q--;
        }
        if (n)                  /* move to next line except on the last delete */
            edit_cursor_move (edit, edit_move_forward (edit, edit->curs1, 1, 0) - edit->curs1);
    }
}

/* if success return 0 */
static int
edit_block_delete (WEdit *edit)
{
    long count;
    long start_mark, end_mark;
    if (eval_marks (edit, &start_mark, &end_mark))
        return 0;
    if (column_highlighting && edit->mark2 < 0)
        edit_mark_cmd (edit, 0);
    if ((end_mark - start_mark) > option_max_undo / 2) {
        /* Warning message with a query to continue or cancel the operation */
        if (edit_query_dialog2
            (_("Warning"),
             _
             (" Block is large, you may not be able to undo this action. "),
             _("C&ontinue"), _("&Cancel"))) {
            return 1;
        }
    }
    edit_push_markers (edit);
    edit_cursor_move (edit, start_mark - edit->curs1);
    edit_scroll_screen_over_cursor (edit);
    count = start_mark;
    if (start_mark < end_mark) {
        if (column_highlighting) {
            if (edit->mark2 < 0)
                edit_mark_cmd (edit, 0);
            edit_delete_column_of_text (edit);
        } else {
            while (count < end_mark) {
                edit_delete (edit);
                count++;
            }
        }
    }
    edit_set_markers (edit, 0, 0, 0, 0);
    edit->force |= REDRAW_PAGE;
    return 0;
}

/* returns 1 if canceelled by user */
int edit_block_delete_cmd (WEdit * edit)
{
    long start_mark, end_mark;
    if (eval_marks (edit, &start_mark, &end_mark)) {
        edit_delete_line (edit);
        return 0;
    }
    return edit_block_delete (edit);
}


#define INPUT_INDEX 9
#define SEARCH_DLG_WIDTH 58
#define SEARCH_DLG_HEIGHT 10
#define REPLACE_DLG_WIDTH 58
#define REPLACE_DLG_HEIGHT 15
#define CONFIRM_DLG_WIDTH 79
#define CONFIRM_DLG_HEIGTH 6
#define B_REPLACE_ALL (B_USER+1)
#define B_REPLACE_ONE (B_USER+2)
#define B_SKIP_REPLACE (B_USER+3)

static int
edit_replace_prompt (WEdit * edit, char *replace_text, int xpos, int ypos)
{
    QuickWidget quick_widgets[] =
    {
        {quick_button, 63, CONFIRM_DLG_WIDTH, 3, CONFIRM_DLG_HEIGTH, N_ ("&Cancel"),
         0, B_CANCEL, 0, 0, NULL},
        {quick_button, 50, CONFIRM_DLG_WIDTH, 3, CONFIRM_DLG_HEIGTH, N_ ("O&ne"),
         0, B_REPLACE_ONE, 0, 0, NULL},
        {quick_button, 37, CONFIRM_DLG_WIDTH, 3, CONFIRM_DLG_HEIGTH, N_ ("A&ll"),
         0, B_REPLACE_ALL, 0, 0, NULL},
        {quick_button, 21, CONFIRM_DLG_WIDTH, 3, CONFIRM_DLG_HEIGTH, N_ ("&Skip"),
         0, B_SKIP_REPLACE, 0, 0, NULL},
        {quick_button, 4, CONFIRM_DLG_WIDTH, 3, CONFIRM_DLG_HEIGTH, N_ ("&Replace"),
         0, B_ENTER, 0, 0, NULL},
        {quick_label, 2, CONFIRM_DLG_WIDTH, 2, CONFIRM_DLG_HEIGTH, 0,
         0, 0, 0, 0, 0},
         NULL_QuickWidget};

    GString *label_text = g_string_new (_(" Replace with: "));
    if (*replace_text) {
        size_t label_len;
        label_len = label_text->len;
        g_string_append (label_text, replace_text);
        convert_to_display (label_text->str + label_len);
    }
    quick_widgets[5].text = label_text->str;

    {
        int retval;
        QuickDialog Quick_input =
        {CONFIRM_DLG_WIDTH, CONFIRM_DLG_HEIGTH, 0, 0, N_ (" Confirm replace "),
         "[Input Line Keys]", 0 /*quick_widgets */, 0 };

        Quick_input.widgets = quick_widgets;

        Quick_input.xpos = xpos;

        /* Sometimes menu can hide replaced text. I don't like it */

        if ((edit->curs_row >= ypos - 1) && (edit->curs_row <= ypos + CONFIRM_DLG_HEIGTH - 1))
            ypos -= CONFIRM_DLG_HEIGTH;

        Quick_input.ypos = ypos;
        retval = quick_dialog (&Quick_input);
        g_string_free (label_text, TRUE);
        return retval;
    }
}

static void
edit_replace_dialog (WEdit * edit, const char *search_default,
                     const char *replace_default, const char *argorder_default,
                     /*@out@*/ char **search_text, /*@out@*/ char **replace_text,
                     /*@out@*/ char **arg_order)
{
    int treplace_scanf = replace_scanf;
    int treplace_regexp = replace_regexp;
    int treplace_all = replace_all;
    int treplace_prompt = replace_prompt;
    int treplace_backwards = replace_backwards;
    int treplace_whole = replace_whole;
    int treplace_case = replace_case;

    QuickWidget quick_widgets[] =
    {
        {quick_button, 6, 10, 12, REPLACE_DLG_HEIGHT, N_("&Cancel"), 0, B_CANCEL, 0,
         0, NULL},
        {quick_button, 2, 10, 12, REPLACE_DLG_HEIGHT, N_("&OK"), 0, B_ENTER, 0,
         0, NULL},
        {quick_checkbox, 33, REPLACE_DLG_WIDTH, 11, REPLACE_DLG_HEIGHT, N_("scanf &Expression"), 0, 0,
         0, 0, NULL},
        {quick_checkbox, 33, REPLACE_DLG_WIDTH, 10, REPLACE_DLG_HEIGHT, N_("replace &All"), 0, 0,
         0, 0, NULL},
        {quick_checkbox, 33, REPLACE_DLG_WIDTH, 9, REPLACE_DLG_HEIGHT, N_("pr&Ompt on replace"), 0, 0,
         0, 0, NULL},
        {quick_checkbox, 4, REPLACE_DLG_WIDTH, 11, REPLACE_DLG_HEIGHT, N_("&Backwards"), 0, 0,
         0, 0, NULL},
        {quick_checkbox, 4, REPLACE_DLG_WIDTH, 10, REPLACE_DLG_HEIGHT, N_("&Regular expression"), 0, 0,
         0, 0, NULL},
        {quick_checkbox, 4, REPLACE_DLG_WIDTH, 9, REPLACE_DLG_HEIGHT, N_("&Whole words only"), 0, 0,
         0, 0, NULL},
        {quick_checkbox, 4, REPLACE_DLG_WIDTH, 8, REPLACE_DLG_HEIGHT, N_("case &Sensitive"), 0, 0,
         0, 0, NULL},
        {quick_input,    3, REPLACE_DLG_WIDTH, 7, REPLACE_DLG_HEIGHT, "", 52, 0, 0,
         0, "edit-argord"},
        {quick_label, 2, REPLACE_DLG_WIDTH, 6, REPLACE_DLG_HEIGHT, N_(" Enter replacement argument order eg. 3,2,1,4 "), 0, 0,
         0, 0, 0},
        {quick_input, 3, REPLACE_DLG_WIDTH, 5, REPLACE_DLG_HEIGHT, "", 52, 0, 0,
         0, "edit-replace"},
        {quick_label, 2, REPLACE_DLG_WIDTH, 4, REPLACE_DLG_HEIGHT, N_(" Enter replacement string:"), 0, 0, 0,
         0, 0},
        {quick_input, 3, REPLACE_DLG_WIDTH, 3, REPLACE_DLG_HEIGHT, "", 52, 0, 0,
         0, "edit-search"},
        {quick_label, 2, REPLACE_DLG_WIDTH, 2, REPLACE_DLG_HEIGHT, N_(" Enter search string:"), 0, 0, 0,
         0, 0},
         NULL_QuickWidget};

    (void) edit;

    quick_widgets[2].result = &treplace_scanf;
    quick_widgets[3].result = &treplace_all;
    quick_widgets[4].result = &treplace_prompt;
    quick_widgets[5].result = &treplace_backwards;
    quick_widgets[6].result = &treplace_regexp;
    quick_widgets[7].result = &treplace_whole;
    quick_widgets[8].result = &treplace_case;
    quick_widgets[9].str_result = arg_order;
    quick_widgets[9].text = argorder_default;
    quick_widgets[11].str_result = replace_text;
    quick_widgets[11].text = replace_default;
    quick_widgets[13].str_result = search_text;
    quick_widgets[13].text = search_default;
    {
        QuickDialog Quick_input =
        {REPLACE_DLG_WIDTH, REPLACE_DLG_HEIGHT, -1, 0, N_(" Replace "),
         "[Input Line Keys]", 0 /*quick_widgets */, 0};

        Quick_input.widgets = quick_widgets;

        if (quick_dialog (&Quick_input) != B_CANCEL) {
            replace_scanf = treplace_scanf;
            replace_backwards = treplace_backwards;
            replace_regexp = treplace_regexp;
            replace_all = treplace_all;
            replace_prompt = treplace_prompt;
            replace_whole = treplace_whole;
            replace_case = treplace_case;
            return;
        } else {
            *arg_order = NULL;
            *replace_text = NULL;
            *search_text = NULL;
            return;
        }
    }
}


static void
edit_search_dialog (WEdit * edit, char **search_text)
{
    int treplace_scanf = replace_scanf;
    int treplace_regexp = replace_regexp;
    int treplace_whole = replace_whole;
    int treplace_case = replace_case;
    int treplace_backwards = replace_backwards;

    QuickWidget quick_widgets[] =
    {
        {quick_button, 6, 10, 7, SEARCH_DLG_HEIGHT, N_("&Cancel"), 0, B_CANCEL, 0,
         0, NULL},
        {quick_button, 2, 10, 7, SEARCH_DLG_HEIGHT, N_("&OK"), 0, B_ENTER, 0,
         0, NULL},
        {quick_checkbox, 33, SEARCH_DLG_WIDTH, 6, SEARCH_DLG_HEIGHT, N_("scanf &Expression"), 0, 0,
         0, 0, NULL },
        {quick_checkbox, 33, SEARCH_DLG_WIDTH, 5, SEARCH_DLG_HEIGHT, N_("&Backwards"), 0, 0,
         0, 0, NULL},
        {quick_checkbox, 4, SEARCH_DLG_WIDTH, 6, SEARCH_DLG_HEIGHT, N_("&Regular expression"), 0, 0,
         0, 0, NULL},
        {quick_checkbox, 4, SEARCH_DLG_WIDTH, 5, SEARCH_DLG_HEIGHT, N_("&Whole words only"), 0, 0,
         0, 0, NULL},
        {quick_checkbox, 4, SEARCH_DLG_WIDTH, 4, SEARCH_DLG_HEIGHT, N_("case &Sensitive"), 0, 0,
         0, 0, NULL},
        {quick_input, 3, SEARCH_DLG_WIDTH, 3, SEARCH_DLG_HEIGHT, "", 52, 0, 0,
         0, "edit-search"},
        {quick_label, 2, SEARCH_DLG_WIDTH, 2, SEARCH_DLG_HEIGHT, N_(" Enter search string:"), 0, 0, 0,
         0, 0},
         NULL_QuickWidget};

    (void) edit;

    quick_widgets[2].result = &treplace_scanf;
    quick_widgets[3].result = &treplace_backwards;
    quick_widgets[4].result = &treplace_regexp;
    quick_widgets[5].result = &treplace_whole;
    quick_widgets[6].result = &treplace_case;
    quick_widgets[7].str_result = search_text;
    quick_widgets[7].text = *search_text;

    {
        QuickDialog Quick_input =
        {SEARCH_DLG_WIDTH, SEARCH_DLG_HEIGHT, -1, 0, N_("Search"),
         "[Input Line Keys]", 0 /*quick_widgets */, 0};

        Quick_input.widgets = quick_widgets;

        if (quick_dialog (&Quick_input) != B_CANCEL) {
            replace_scanf = treplace_scanf;
            replace_backwards = treplace_backwards;
            replace_regexp = treplace_regexp;
            replace_whole = treplace_whole;
            replace_case = treplace_case;
        } else {
            *search_text = NULL;
        }
    }
}


static long sargs[NUM_REPL_ARGS][256 / sizeof (long)];

#define SCANF_ARGS sargs[0], sargs[1], sargs[2], sargs[3], \
                     sargs[4], sargs[5], sargs[6], sargs[7], \
                     sargs[8], sargs[9], sargs[10], sargs[11], \
                     sargs[12], sargs[13], sargs[14], sargs[15]

#define PRINTF_ARGS sargs[argord[0]], sargs[argord[1]], sargs[argord[2]], sargs[argord[3]], \
                     sargs[argord[4]], sargs[argord[5]], sargs[argord[6]], sargs[argord[7]], \
                     sargs[argord[8]], sargs[argord[9]], sargs[argord[10]], sargs[argord[11]], \
                     sargs[argord[12]], sargs[argord[13]], sargs[argord[14]], sargs[argord[15]]


/* This function is a modification of mc-3.2.10/src/view.c:regexp_view_search() */
/* returns -3 on error in pattern, -1 on not found, found_len = 0 if either */
static int
string_regexp_search (char *pattern, char *string, int match_type,
                      int match_bol, int icase, int *found_len, void *d)
{
    static regex_t r;
    static char *old_pattern = NULL;
    static int old_type, old_icase;
    regmatch_t *pmatch;
    static regmatch_t s[1];

    pmatch = (regmatch_t *) d;
    if (!pmatch)
        pmatch = s;

    if (!old_pattern || strcmp (old_pattern, pattern)
        || old_type != match_type || old_icase != icase) {
        if (old_pattern) {
            regfree (&r);
            g_free (old_pattern);
            old_pattern = 0;
        }
        if (regcomp (&r, pattern, REG_EXTENDED | (icase ? REG_ICASE : 0))) {
            *found_len = 0;
            return -3;
        }
        old_pattern = g_strdup (pattern);
        old_type = match_type;
        old_icase = icase;
    }
    if (regexec
        (&r, string, d ? NUM_REPL_ARGS : 1, pmatch,
         ((match_bol
           || match_type != match_normal) ? 0 : REG_NOTBOL)) != 0) {
        *found_len = 0;
        return -1;
    }
    *found_len = pmatch[0].rm_eo - pmatch[0].rm_so;
    return (pmatch[0].rm_so);
}

/* thanks to  Liviu Daia <daia@stoilow.imar.ro>  for getting this
   (and the above) routines to work properly - paul */

typedef int (*edit_getbyte_fn) (WEdit *, long);

static long
edit_find_string (long start, unsigned char *exp, int *len, long last_byte, edit_getbyte_fn get_byte, void *data, int once_only, void *d)
{
    long p, q = 0;
    long l = strlen ((char *) exp), f = 0;
    int n = 0;

    for (p = 0; p < l; p++)     /* count conversions... */
        if (exp[p] == '%')
            if (exp[++p] != '%')        /* ...except for "%%" */
                n++;

    if (replace_scanf || replace_regexp) {
        int c;
        unsigned char *buf;
        unsigned char mbuf[MAX_REPL_LEN * 2 + 3];

        replace_scanf = (!replace_regexp);      /* can't have both */

        buf = mbuf;

        if (replace_scanf) {
            unsigned char e[MAX_REPL_LEN];
            if (n >= NUM_REPL_ARGS)
                return -3;

            if (replace_case) {
                for (p = start; p < last_byte && p < start + MAX_REPL_LEN; p++)
                    buf[p - start] = (*get_byte) (data, p);
            } else {
                for (p = 0; exp[p] != 0; p++)
                    exp[p] = my_lower_case (exp[p]);
                for (p = start; p < last_byte && p < start + MAX_REPL_LEN; p++) {
                    c = (*get_byte) (data, p);
                    buf[p - start] = my_lower_case (c);
                }
            }

            buf[(q = p - start)] = 0;
            strcpy ((char *) e, (char *) exp);
            strcat ((char *) e, "%n");
            exp = e;

            while (q) {
                *((int *) sargs[n]) = 0;        /* --> here was the problem - now fixed: good */
                if (n == sscanf ((char *) buf, (char *) exp, SCANF_ARGS)) {
                    if (*((int *) sargs[n])) {
                        *len = *((int *) sargs[n]);
                        return start;
                    }
                }
                if (once_only)
                    return -2;
                if (q + start < last_byte) {
                    if (replace_case) {
                        buf[q] = (*get_byte) (data, q + start);
                    } else {
                        c = (*get_byte) (data, q + start);
                        buf[q] = my_lower_case (c);
                    }
                    q++;
                }
                buf[q] = 0;
                start++;
                buf++;          /* move the window along */
                if (buf == mbuf + MAX_REPL_LEN) {       /* the window is about to go past the end of array, so... */
                    memmove (mbuf, buf, strlen ((char *) buf) + 1);     /* reset it */
                    buf = mbuf;
                }
                q--;
            }
        } else {        /* regexp matching */
            long offset = 0;
            int found_start, match_bol, move_win = 0;

            while (start + offset < last_byte) {
                match_bol = (offset == 0 || (*get_byte) (data, start + offset - 1) == '\n');
                if (!move_win) {
                    p = start + offset;
                    q = 0;
                }
                for (; p < last_byte && q < MAX_REPL_LEN; p++, q++) {
                    mbuf[q] = (*get_byte) (data, p);
                    if (mbuf[q] == '\n')
                        break;
                }
                q++;
                offset += q;
                mbuf[q] = 0;

                buf = mbuf;
                while (q) {
                    found_start = string_regexp_search ((char *) exp, (char *) buf, match_normal, match_bol, !replace_case, len, d);

                    if (found_start <= -2) {    /* regcomp/regexec error */
                        *len = 0;
                        return -3;
                    }
                    else if (found_start == -1) /* not found: try next line */
                        break;
                    else if (*len == 0) { /* null pattern: try again at next character */
                        q--;
                        buf++;
                        match_bol = 0;
                        continue;
                    }
                    else        /* found */
                        return (start + offset - q + found_start);
                }
                if (once_only)
                    return -2;

                if (buf[q - 1] != '\n') { /* incomplete line: try to recover */
                    buf = mbuf + MAX_REPL_LEN / 2;
                    q = strlen ((const char *) buf);
                    memmove (mbuf, buf, q);
                    p = start + q;
                    move_win = 1;
                }
                else
                    move_win = 0;
            }
        }
    } else {
        *len = strlen ((const char *) exp);
        if (replace_case) {
            for (p = start; p <= last_byte - l; p++) {
                if ((*get_byte) (data, p) == (unsigned char)exp[0]) {   /* check if first char matches */
                    for (f = 0, q = 0; q < l && f < 1; q++)
                        if ((*get_byte) (data, q + p) != (unsigned char)exp[q])
                            f = 1;
                    if (f == 0)
                        return p;
                }
                if (once_only)
                    return -2;
            }
        } else {
            for (p = 0; exp[p] != 0; p++)
                exp[p] = my_lower_case (exp[p]);

            for (p = start; p <= last_byte - l; p++) {
                if (my_lower_case ((*get_byte) (data, p)) == (unsigned char)exp[0]) {
                    for (f = 0, q = 0; q < l && f < 1; q++)
                        if (my_lower_case ((*get_byte) (data, q + p)) != (unsigned char)exp[q])
                            f = 1;
                    if (f == 0)
                        return p;
                }
                if (once_only)
                    return -2;
            }
        }
    }
    return -2;
}


static long
edit_find_forwards (long search_start, unsigned char *exp, int *len, long last_byte, edit_getbyte_fn get_byte, void *data, int once_only, void *d)
{                               /*front end to find_string to check for
                                   whole words */
    long p;
    p = search_start;

    while ((p = edit_find_string (p, exp, len, last_byte, get_byte, data, once_only, d)) >= 0) {
        if (replace_whole) {
/*If the bordering chars are not in option_whole_chars_search then word is whole */
            if (!strcasechr (option_whole_chars_search, (*get_byte) (data, p - 1))
                && !strcasechr (option_whole_chars_search, (*get_byte) (data, p + *len)))
                return p;
            if (once_only)
                return -2;
        } else
            return p;
        if (once_only)
            break;
        p++;                    /*not a whole word so continue search. */
    }
    return p;
}

static long
edit_find (long search_start, unsigned char *exp, int *len, long last_byte, edit_getbyte_fn get_byte, void *data, void *d)
{
    long p;
    if (replace_backwards) {
        while (search_start >= 0) {
            p = edit_find_forwards (search_start, exp, len, last_byte, get_byte, data, 1, d);
            if (p == search_start)
                return p;
            search_start--;
        }
    } else {
        return edit_find_forwards (search_start, exp, len, last_byte, get_byte, data, 0, d);
    }
    return -2;
}

#define is_digit(x) ((x) >= '0' && (x) <= '9')

#define snprint(v) { \
                *p1++ = *p++; \
                *p1 = '\0'; \
                n = snprintf(s,e-s,q1,v); \
                if (n >= (size_t) (e - s)) goto nospc; \
                s += n; \
            }

/* this function uses the sprintf command to do a vprintf */
/* it takes pointers to arguments instead of the arguments themselves */
/* The return value is the number of bytes written excluding '\0'
   if successfull, -1 if the resulting string would be too long and
   -2 if the format string is errorneous.  */
static int snprintf_p (char *str, size_t size, const char *fmt,...)
    __attribute__ ((format (printf, 3, 4)));

static int snprintf_p (char *str, size_t size, const char *fmt,...)
{
    va_list ap;
    size_t n;
    const char *q, *p;
    char *s = str, *e = str + size;
    char q1[40];
    char *p1;
    int nargs = 0;

    va_start (ap, fmt);
    p = q = fmt;

    while ((p = strchr (p, '%'))) {
        n = p - q;
        if (n >= (size_t) (e - s))
          goto nospc;
        memcpy (s, q, n);       /* copy stuff between format specifiers */
        s += n;
        q = p;
        p1 = q1;
        *p1++ = *p++;
        if (*p == '%') {
            p++;
            *s++ = '%';
            if (s == e)
                goto nospc;
            q = p;
            continue;
        }
        if (*p == 'n')
            goto err;
        /* We were passed only 16 arguments.  */
        if (++nargs == 16)
            goto err;
        if (*p == '#')
            *p1++ = *p++;
        if (*p == '0')
            *p1++ = *p++;
        if (*p == '-')
            *p1++ = *p++;
        if (*p == '+')
            *p1++ = *p++;
        if (*p == '*') {
            p++;
            strcpy (p1, MY_itoa (*va_arg (ap, int *))); /* replace field width with a number */
            p1 += strlen (p1);
        } else {
            while (is_digit (*p) && p1 < q1 + 20)
                *p1++ = *p++;
            if (is_digit (*p))
                goto err;
        }
        if (*p == '.')
            *p1++ = *p++;
        if (*p == '*') {
            p++;
            strcpy (p1, MY_itoa (*va_arg (ap, int *))); /* replace precision with a number */
            p1 += strlen (p1);
        } else {
            while (is_digit (*p) && p1 < q1 + 32)
                *p1++ = *p++;
            if (is_digit (*p))
                goto err;
        }
/* flags done, now get argument */
        if (*p == 's') {
            snprint (va_arg (ap, char *));
        } else if (*p == 'h') {
            if (strchr ("diouxX", *p))
                snprint (*va_arg (ap, short *));
        } else if (*p == 'l') {
            *p1++ = *p++;
            if (strchr ("diouxX", *p))
                snprint (*va_arg (ap, long *));
        } else if (strchr ("cdiouxX", *p)) {
            snprint (*va_arg (ap, int *));
        } else if (*p == 'L') {
            *p1++ = *p++;
            if (strchr ("EefgG", *p))
                snprint (*va_arg (ap, double *));       /* should be long double */
        } else if (strchr ("EefgG", *p)) {
            snprint (*va_arg (ap, double *));
        } else if (strchr ("DOU", *p)) {
            snprint (*va_arg (ap, long *));
        } else if (*p == 'p') {
            snprint (*va_arg (ap, void **));
        } else
            goto err;
        q = p;
    }
    va_end (ap);
    n = strlen (q);
    if (n >= (size_t) (e - s))
        return -1;
    memcpy (s, q, n + 1);
    return s + n - str;
nospc:
    va_end (ap);
    return -1;
err:
    va_end (ap);
    return -2;
}

static void regexp_error (WEdit *edit)
{
    (void) edit;
    edit_error_dialog (_("Error"), _(" Invalid regular expression, or scanf expression with too many conversions "));
}

/* call with edit = 0 before shutdown to close memory leaks */
void
edit_replace_cmd (WEdit *edit, int again)
{
    static regmatch_t pmatch[NUM_REPL_ARGS];
    /* 1 = search string, 2 = replace with, 3 = argument order */
    static char *saved1 = NULL; /* saved default[123] */
    static char *saved2 = NULL;
    static char *saved3 = NULL;
    char *input1 = NULL;        /* user input from the dialog */
    char *input2 = NULL;
    char *input3 = NULL;
    int replace_yes;
    int replace_continue;
    int treplace_prompt = 0;
    long times_replaced = 0, last_search;
    int argord[NUM_REPL_ARGS];

    if (!edit) {
        g_free (saved1), saved1 = NULL;
        g_free (saved2), saved2 = NULL;
        g_free (saved3), saved3 = NULL;
        return;
    }

    last_search = edit->last_byte;

    edit->force |= REDRAW_COMPLETELY;

    if (again && !saved1 && !saved2)
        again = 0;

    if (again) {
        input1 = g_strdup (saved1 ? saved1 : "");
        input2 = g_strdup (saved2 ? saved2 : "");
        input3 = g_strdup (saved3 ? saved3 : "");
    } else {
        char *disp1 = g_strdup (saved1 ? saved1 : "");
        char *disp2 = g_strdup (saved2 ? saved2 : "");
        char *disp3 = g_strdup (saved3 ? saved3 : "");

        convert_to_display (disp1);
        convert_to_display (disp2);
        convert_to_display (disp3);

        edit_push_action (edit, KEY_PRESS + edit->start_display);
        edit_replace_dialog (edit, disp1, disp2, disp3, &input1, &input2,
                             &input3);

        g_free (disp1);
        g_free (disp2);
        g_free (disp3);

        convert_from_input (input1);
        convert_from_input (input2);
        convert_from_input (input3);

        treplace_prompt = replace_prompt;
        if (input1 == NULL || *input1 == '\0') {
            edit->force = REDRAW_COMPLETELY;
            goto cleanup;
        }

        g_free (saved1), saved1 = g_strdup (input1);
        g_free (saved2), saved2 = g_strdup (input2);
        g_free (saved3), saved3 = g_strdup (input3);

    }

    {
        const char *s;
        int ord;
        size_t i;

        s = input3;
        for (i = 0; i < NUM_REPL_ARGS; i++) {
            if (s != NULL && *s != '\0') {
                ord = atoi (s);
                if ((ord > 0) && (ord <= NUM_REPL_ARGS))
                    argord[i] = ord - 1;
                else
                    argord[i] = i;
                s = strchr (s, ',');
                if (s != NULL)
                    s++;
            } else
                argord[i] = i;
        }
    }

    replace_continue = replace_all;

    if (edit->found_len && edit->search_start == edit->found_start + 1
        && replace_backwards)
        edit->search_start--;

    if (edit->found_len && edit->search_start == edit->found_start - 1
        && !replace_backwards)
        edit->search_start++;

    do {
        int len = 0;
        long new_start;
        new_start =
            edit_find (edit->search_start, (unsigned char *) input1, &len,
                       last_search, edit_get_byte, (void *) edit, pmatch);
        if (new_start == -3) {
            regexp_error (edit);
            break;
        }
        edit->search_start = new_start;
        /*returns negative on not found or error in pattern */

        if (edit->search_start >= 0) {
            int i;

            edit->found_start = edit->search_start;
            i = edit->found_len = len;

            edit_cursor_move (edit, edit->search_start - edit->curs1);
            edit_scroll_screen_over_cursor (edit);

            replace_yes = 1;

            if (treplace_prompt) {
                int l;
                l = edit->curs_row - edit->num_widget_lines / 3;
                if (l > 0)
                    edit_scroll_downward (edit, l);
                if (l < 0)
                    edit_scroll_upward (edit, -l);

                edit_scroll_screen_over_cursor (edit);
                edit->force |= REDRAW_PAGE;
                edit_render_keypress (edit);

                /*so that undo stops at each query */
                edit_push_key_press (edit);

                switch (edit_replace_prompt (edit, input2,      /* and prompt 2/3 down */
                                             (edit->num_widget_columns -
                                              CONFIRM_DLG_WIDTH) / 2,
                                             edit->num_widget_lines * 2 /
                                             3)) {
                case B_ENTER:
                    break;
                case B_SKIP_REPLACE:
                    replace_yes = 0;
                    break;
                case B_REPLACE_ALL:
                    treplace_prompt = 0;
                    replace_continue = 1;
                    break;
                case B_REPLACE_ONE:
                    replace_continue = 0;
                    break;
                case B_CANCEL:
                    replace_yes = 0;
                    replace_continue = 0;
                    break;
                }
            }
            if (replace_yes) {  /* delete then insert new */
                if (replace_scanf || replace_regexp) {
                    char repl_str[MAX_REPL_LEN + 2];
                    int ret = 0;

                    /* we need to fill in sargs just like with scanf */
                    if (replace_regexp) {
                        int k, j;
                        for (k = 1;
                             k < NUM_REPL_ARGS && pmatch[k].rm_eo >= 0;
                             k++) {
                            unsigned char *t;

                            if (pmatch[k].rm_eo - pmatch[k].rm_so > 255) {
                                ret = -1;
                                break;
                            }
                            t = (unsigned char *) &sargs[k - 1][0];
                            for (j = 0;
                                 j < pmatch[k].rm_eo - pmatch[k].rm_so
                                 && j < 255; j++, t++)
                                *t = (unsigned char) edit_get_byte (edit,
                                                                    edit->
                                                                    search_start
                                                                    -
                                                                    pmatch
                                                                    [0].
                                                                    rm_so +
                                                                    pmatch
                                                                    [k].
                                                                    rm_so +
                                                                    j);
                            *t = '\0';
                        }
                        for (; k <= NUM_REPL_ARGS; k++)
                            sargs[k - 1][0] = 0;
                    }
                    if (!ret)
                        ret =
                            snprintf_p (repl_str, MAX_REPL_LEN + 2, input2,
                                        PRINTF_ARGS);
                    if (ret >= 0) {
                        times_replaced++;
                        while (i--)
                            edit_delete (edit);
                        while (repl_str[++i])
                            edit_insert (edit, repl_str[i]);
                    } else {
                        edit_error_dialog (_(" Replace "),
                                           ret ==
                                           -2 ?
                                           _
                                           (" Error in replacement format string. ")
                                           : _(" Replacement too long. "));
                        replace_continue = 0;
                    }
                } else {
                    times_replaced++;
                    while (i--)
                        edit_delete (edit);
                    while (input2[++i])
                        edit_insert (edit, input2[i]);
                }
                edit->found_len = i;
            }
            /* so that we don't find the same string again */
            if (replace_backwards) {
                last_search = edit->search_start;
                edit->search_start--;
            } else {
                edit->search_start += i;
                last_search = edit->last_byte;
            }
            edit_scroll_screen_over_cursor (edit);
        } else {
            const char *msg = _(" Replace ");
            /* try and find from right here for next search */
            edit->search_start = edit->curs1;
            edit_update_curs_col (edit);

            edit->force |= REDRAW_PAGE;
            edit_render_keypress (edit);
            if (times_replaced) {
                message (0, msg, _(" %ld replacements made. "),
                         times_replaced);
            } else
                edit_message_dialog (msg, _(" Search string not found "));
            replace_continue = 0;
        }
    } while (replace_continue);

    edit->force = REDRAW_COMPLETELY;
    edit_scroll_screen_over_cursor (edit);
  cleanup:
    g_free (input1);
    g_free (input2);
    g_free (input3);
}




void edit_search_cmd (WEdit * edit, int again)
{
    static char *old = NULL;
    char *exp = "";

    if (!edit) {
        g_free (old);
        old = 0;
        return;
    }
    exp = old ? old : exp;
    if (again) {                /*ctrl-hotkey for search again. */
        if (!old)
            return;
        exp = g_strdup (old);
    } else {

#ifdef HAVE_CHARSET
        if (exp && *exp)
            convert_to_display (exp);
#endif /* HAVE_CHARSET */

        edit_search_dialog (edit, &exp);

#ifdef HAVE_CHARSET
        if (exp && *exp)
            convert_from_input (exp);
#endif /* HAVE_CHARSET */

        edit_push_action (edit, KEY_PRESS + edit->start_display);
    }

    if (exp) {
        if (*exp) {
            int len = 0;
            g_free (old);
            old = g_strdup (exp);

            if (search_create_bookmark) {
                int found = 0, books = 0;
                int l = 0, l_last = -1;
                long p, q = 0;
                for (;;) {
                    p = edit_find (q, (unsigned char *) exp, &len, edit->last_byte,
                                   edit_get_byte, (void *) edit, 0);
                    if (p < 0)
                        break;
                    found++;
                    l += edit_count_lines (edit, q, p);
                    if (l != l_last) {
                        book_mark_insert (edit, l, BOOK_MARK_FOUND_COLOR);
                        books++;
                    }
                    l_last = l;
                    q = p + 1;
                }
                if (found) {
/* in response to number of bookmarks added because of string being found %d times */
                    message (0, _("Search"), _(" %d items found, %d bookmarks added "), found, books);
                } else {
                    edit_error_dialog (_ ("Search"), _ (" Search string not found "));
                }
            } else {

                if (edit->found_len && edit->search_start == edit->found_start + 1 && replace_backwards)
                    edit->search_start--;

                if (edit->found_len && edit->search_start == edit->found_start - 1 && !replace_backwards)
                    edit->search_start++;

                edit->search_start = edit_find (edit->search_start, (unsigned char *) exp, &len, edit->last_byte,
                                                edit_get_byte, (void *) edit, 0);

                if (edit->search_start >= 0) {
                    edit->found_start = edit->search_start;
                    edit->found_len = len;

                    edit_cursor_move (edit, edit->search_start - edit->curs1);
                    edit_scroll_screen_over_cursor (edit);
                    if (replace_backwards)
                        edit->search_start--;
                    else
                        edit->search_start++;
                } else if (edit->search_start == -3) {
                    edit->search_start = edit->curs1;
                    regexp_error (edit);
                } else {
                    edit->search_start = edit->curs1;
                    edit_error_dialog (_ ("Search"), _ (" Search string not found "));
                }
            }
        }
        g_free (exp);
    }
    edit->force |= REDRAW_COMPLETELY;
    edit_scroll_screen_over_cursor (edit);
}


/*
 * Check if it's OK to close the editor.  If there are unsaved changes,
 * ask user.  Return 1 if it's OK to exit, 0 to continue editing.
 */
int
edit_ok_to_exit (WEdit *edit)
{
    if (!edit->modified)
        return 1;

    switch (edit_query_dialog3
            (_("Quit"), _(" File was modified, Save with exit? "),
             _("&Cancel quit"), _("&Yes"), _("&No"))) {
    case 1:
        edit_push_markers (edit);
        edit_set_markers (edit, 0, 0, 0, 0);
        if (!edit_save_cmd (edit))
            return 0;
        break;
    case 2:
        if (edit->locked)
            edit->locked = edit_unlock_file (edit->filename);
        break;
    case 0:
    case -1:
        return 0;
    }

    return 1;
}


#define TEMP_BUF_LEN 1024

/* Return a null terminated length of text. Result must be g_free'd */
static unsigned char *
edit_get_block (WEdit *edit, long start, long finish, int *l)
{
    unsigned char *s, *r;
    r = s = g_malloc (finish - start + 1);
    if (column_highlighting) {
        *l = 0;
        /* copy from buffer, excluding chars that are out of the column 'margins' */
        while (start < finish) {
            int c, x;
            x = edit_move_forward3 (edit, edit_bol (edit, start), 0,
                                    start);
            c = edit_get_byte (edit, start);
            if ((x >= edit->column1 && x < edit->column2)
                || (x >= edit->column2 && x < edit->column1) || c == '\n') {
                *s++ = c;
                (*l)++;
            }
            start++;
        }
    } else {
        *l = finish - start;
        while (start < finish)
            *s++ = edit_get_byte (edit, start++);
    }
    *s = 0;
    return r;
}

/* save block, returns 1 on success */
int
edit_save_block (WEdit * edit, const char *filename, long start,
                 long finish)
{
    int len, file;

    if ((file =
         mc_open (filename, O_CREAT | O_WRONLY | O_TRUNC,
                  S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH | O_BINARY)) == -1)
        return 0;

    if (column_highlighting) {
        unsigned char *block, *p;
        int r;
        p = block = edit_get_block (edit, start, finish, &len);
        while (len) {
            r = mc_write (file, p, len);
            if (r < 0)
                break;
            p += r;
            len -= r;
        }
        g_free (block);
    } else {
        unsigned char *buf;
        int i = start, end;
        len = finish - start;
        buf = g_malloc (TEMP_BUF_LEN);
        while (start != finish) {
            end = min (finish, start + TEMP_BUF_LEN);
            for (; i < end; i++)
                buf[i - start] = edit_get_byte (edit, i);
            len -= mc_write (file, (char *) buf, end - start);
            start = end;
        }
        g_free (buf);
    }
    mc_close (file);
    if (len)
        return 0;
    return 1;
}

/* copies a block to clipboard file */
static int edit_save_block_to_clip_file (WEdit * edit, long start, long finish)
{
    return edit_save_block (edit, catstrs (home_dir, CLIP_FILE, (char *) NULL), start, finish);
}


void edit_paste_from_history (WEdit *edit)
{
    (void) edit;
    edit_error_dialog (_(" Error "), _(" This function is not implemented. "));
}

int edit_copy_to_X_buf_cmd (WEdit * edit)
{
    long start_mark, end_mark;
    if (eval_marks (edit, &start_mark, &end_mark))
        return 0;
    if (!edit_save_block_to_clip_file (edit, start_mark, end_mark)) {
        edit_error_dialog (_(" Copy to clipboard "), get_sys_error (_(" Unable to save to file. ")));
        return 1;
    }
    edit_mark_cmd (edit, 1);
    return 0;
}

int edit_cut_to_X_buf_cmd (WEdit * edit)
{
    long start_mark, end_mark;
    if (eval_marks (edit, &start_mark, &end_mark))
        return 0;
    if (!edit_save_block_to_clip_file (edit, start_mark, end_mark)) {
        edit_error_dialog (_(" Cut to clipboard "), _(" Unable to save to file. "));
        return 1;
    }
    edit_block_delete_cmd (edit);
    edit_mark_cmd (edit, 1);
    return 0;
}

void edit_paste_from_X_buf_cmd (WEdit * edit)
{
    edit_insert_file (edit, catstrs (home_dir, CLIP_FILE, (char *) NULL));
}


/*
 * Ask user for the line and go to that line.
 * Negative numbers mean line from the end (i.e. -1 is the last line).
 */
void
edit_goto_cmd (WEdit *edit)
{
    char *f;
    static long line = 0;       /* line as typed, saved as default */
    long l;
    char *error;
    char s[32];

    g_snprintf (s, sizeof (s), "%ld", line);
    f = input_dialog (_(" Goto line "), _(" Enter line: "), line ? s : "");
    if (!f)
        return;

    if (!*f) {
        g_free (f);
        return;
    }

    l = strtol (f, &error, 0);
    if (*error) {
        g_free (f);
        return;
    }

    line = l;
    if (l < 0)
        l = edit->total_lines + l + 2;
    edit_move_display (edit, l - edit->num_widget_lines / 2 - 1);
    edit_move_to_line (edit, l - 1);
    edit->force |= REDRAW_COMPLETELY;
    g_free (f);
}


/* Return 1 on success */
int
edit_save_block_cmd (WEdit *edit)
{
    long start_mark, end_mark;
    char *exp;
    if (eval_marks (edit, &start_mark, &end_mark))
        return 1;
    exp =
        edit_get_save_file (catstrs (home_dir, CLIP_FILE, (char *) NULL),
                            _(" Save Block "));
    edit_push_action (edit, KEY_PRESS + edit->start_display);
    if (exp) {
        if (!*exp) {
            g_free (exp);
            return 0;
        } else {
            if (edit_save_block (edit, exp, start_mark, end_mark)) {
                g_free (exp);
                edit->force |= REDRAW_COMPLETELY;
                return 1;
            } else {
                g_free (exp);
                edit_error_dialog (_(" Save Block "),
                                   get_sys_error (_
                                                  (" Cannot save file. ")));
            }
        }
    }
    edit->force |= REDRAW_COMPLETELY;
    return 0;
}


/* returns 1 on success */
int
edit_insert_file_cmd (WEdit *edit)
{
    char *exp = edit_get_load_file (catstrs (home_dir, CLIP_FILE, (char *) NULL),
                                    _(" Insert File "));
    edit_push_action (edit, KEY_PRESS + edit->start_display);
    if (exp) {
        if (!*exp) {
            g_free (exp);
            return 0;
        } else {
            if (edit_insert_file (edit, exp)) {
                g_free (exp);
                edit->force |= REDRAW_COMPLETELY;
                return 1;
            } else {
                g_free (exp);
                edit_error_dialog (_(" Insert File "),
                                   get_sys_error (_
                                                  (" Cannot insert file. ")));
            }
        }
    }
    edit->force |= REDRAW_COMPLETELY;
    return 0;
}

/* sorts a block, returns -1 on system fail, 1 on cancel and 0 on success */
int edit_sort_cmd (WEdit * edit)
{
    static char *old = 0;
    char *exp;
    long start_mark, end_mark;
    int e;

    if (eval_marks (edit, &start_mark, &end_mark)) {
        edit_error_dialog (_(" Sort block "), _(" You must first highlight a block of text. "));
        return 0;
    }
    edit_save_block (edit, catstrs (home_dir, BLOCK_FILE, (char *) NULL), start_mark, end_mark);

    exp = old ? old : "";

    exp = input_dialog (_(" Run Sort "),
    _(" Enter sort options (see manpage) separated by whitespace: "), exp);

    if (!exp)
        return 1;
    g_free (old);
    old = exp;

    e = system (catstrs (" sort ", exp, " ", home_dir, BLOCK_FILE, " > ", home_dir, TEMP_FILE, (char *) NULL));
    if (e) {
        if (e == -1 || e == 127) {
            edit_error_dialog (_(" Sort "),
            get_sys_error (_(" Cannot execute sort command ")));
        } else {
            char q[8];
            sprintf (q, "%d ", e);
            edit_error_dialog (_(" Sort "),
            catstrs (_(" Sort returned non-zero: "), q, (char *) NULL));
        }
        return -1;
    }

    edit->force |= REDRAW_COMPLETELY;

    if (edit_block_delete_cmd (edit))
        return 1;
    edit_insert_file (edit, catstrs (home_dir, TEMP_FILE, (char *) NULL));
    return 0;
}

/*
 * Ask user for a command, execute it and paste its output back to the
 * editor.
 */
int
edit_ext_cmd (WEdit *edit)
{
    char *exp;
    int e;

    exp =
        input_dialog (_("Paste output of external command"),
                      _("Enter shell command(s):"), NULL);

    if (!exp)
        return 1;

    e = system (catstrs (exp, " > ", home_dir, TEMP_FILE, (char *) NULL));
    g_free (exp);

    if (e) {
        edit_error_dialog (_("External command"),
                           get_sys_error (_("Cannot execute command")));
        return -1;
    }

    edit->force |= REDRAW_COMPLETELY;

    edit_insert_file (edit, catstrs (home_dir, TEMP_FILE, (char *) NULL));
    return 0;
}

/* if block is 1, a block must be highlighted and the shell command
   processes it. If block is 0 the shell command is a straight system
   command, that just produces some output which is to be inserted */
void
edit_block_process_cmd (WEdit *edit, const char *shell_cmd, int block)
{
    long start_mark, end_mark;
    char buf[BUFSIZ];
    FILE *script_home = NULL;
    FILE *script_src = NULL;
    FILE *block_file = NULL;
    const char *o = NULL;
    const char *h = NULL;
    const char *b = NULL;
    char *quoted_name = NULL;

    o = catstrs (mc_home, shell_cmd, (char *) NULL);    /* original source script */
    h = catstrs (home_dir, EDIT_DIR, shell_cmd, (char *) NULL); /* home script */
    b = catstrs (home_dir, BLOCK_FILE, (char *) NULL);  /* block file */

    if (!(script_home = fopen (h, "r"))) {
        if (!(script_home = fopen (h, "w"))) {
            edit_error_dialog ("", get_sys_error (catstrs
                                                  (_
                                                   ("Error creating script:"),
                                                   h, (char *) NULL)));
            return;
        }
        if (!(script_src = fopen (o, "r"))) {
            fclose (script_home);
            unlink (h);
            edit_error_dialog ("", get_sys_error (catstrs
                                                  (_("Error reading script:"),
                                                   o, (char *) NULL)));
            return;
        }
        while (fgets (buf, sizeof (buf), script_src))
            fputs (buf, script_home);
        if (fclose (script_home)) {
            edit_error_dialog ("", get_sys_error (catstrs
                                                  (_
                                                   ("Error closing script:"),
                                                   h, (char *) NULL)));
            return;
        }
        chmod (h, 0700);
        edit_error_dialog ("", get_sys_error (catstrs
                                              (_("Script created:"), h, (char *) NULL)));
    }

    open_error_pipe ();

    if (block) {                /* for marked block run indent formatter */
        if (eval_marks (edit, &start_mark, &end_mark)) {
            edit_error_dialog (_("Process block"),
                               _
                               (" You must first highlight a block of text. "));
            return;
        }
        edit_save_block (edit, b, start_mark, end_mark);
        quoted_name = name_quote (edit->filename, 0);
        /*
         * Run script.
         * Initial space is to avoid polluting bash history.
         * Arguments:
         *   $1 - name of the edited file (to check its extension etc).
         *   $2 - file containing the current block.
         *   $3 - file where error messages should be put
         *        (for compatibility with old scripts).
         */
        system (catstrs (" ", home_dir, EDIT_DIR, shell_cmd, " ", quoted_name,
                         " ", home_dir, BLOCK_FILE " /dev/null", (char *) NULL));

    } else {
        /*
         * No block selected, just execute the command for the file.
         * Arguments:
         *   $1 - name of the edited file.
         */
        system (catstrs (" ", home_dir, EDIT_DIR, shell_cmd, " ",
                         quoted_name, (char *) NULL));
    }
    g_free (quoted_name);
    close_error_pipe (0, 0);

    edit_refresh_cmd (edit);
    edit->force |= REDRAW_COMPLETELY;

    /* insert result block */
    if (block) {
        if (edit_block_delete_cmd (edit))
            return;
        edit_insert_file (edit, b);
        if ((block_file = fopen (b, "w")))
            fclose (block_file);
        return;
    }

    return;
}

/* prints at the cursor */
/* returns the number of chars printed */
int edit_print_string (WEdit * e, const char *s)
{
    int i = 0;
    while (s[i])
        edit_execute_cmd (e, -1, (unsigned char) s[i++]);
    e->force |= REDRAW_COMPLETELY;
    edit_update_screen (e);
    return i;
}


static void pipe_mail (WEdit *edit, char *to, char *subject, char *cc)
{
    FILE *p = 0;
    char *s;

    to = name_quote (to, 0);
    subject = name_quote (subject, 0);
    cc = name_quote (cc, 0);
    s = g_strconcat ("mail -s ", subject, *cc ? " -c " : "" , cc, " ",  to, (char *) NULL);
    g_free (to);
    g_free (subject);
    g_free (cc);

    if (s) {
        p = popen (s, "w");
        g_free (s);
    }

    if (p) {
        long i;
        for (i = 0; i < edit->last_byte; i++)
            fputc (edit_get_byte (edit, i), p);
        pclose (p);
    }
}

#define MAIL_DLG_HEIGHT 12

void edit_mail_dialog (WEdit * edit)
{
    char *tmail_to;
    char *tmail_subject;
    char *tmail_cc;

    static char *mail_cc_last = 0;
    static char *mail_subject_last = 0;
    static char *mail_to_last = 0;

    QuickDialog Quick_input =
    {50, MAIL_DLG_HEIGHT, -1, 0, N_(" Mail "),
     "[Input Line Keys]", 0, 0};

    QuickWidget quick_widgets[] =
    {
        {quick_button, 6, 10, 9, MAIL_DLG_HEIGHT, N_("&Cancel"), 0, B_CANCEL, 0,
         0, NULL},
        {quick_button, 2, 10, 9, MAIL_DLG_HEIGHT, N_("&OK"), 0, B_ENTER, 0,
         0, NULL},
        {quick_input, 3, 50, 8, MAIL_DLG_HEIGHT, "", 44, 0, 0,
         0, "mail-dlg-input"},
        {quick_label, 2, 50, 7, MAIL_DLG_HEIGHT, N_(" Copies to"), 0, 0, 0,
         0, 0},
        {quick_input, 3, 50, 6, MAIL_DLG_HEIGHT, "", 44, 0, 0,
         0, "mail-dlg-input-2"},
        {quick_label, 2, 50, 5, MAIL_DLG_HEIGHT, N_(" Subject"), 0, 0, 0,
         0, 0},
        {quick_input, 3, 50, 4, MAIL_DLG_HEIGHT, "", 44, 0, 0,
         0, "mail-dlg-input-3"},
        {quick_label, 2, 50, 3, MAIL_DLG_HEIGHT, N_(" To"), 0, 0, 0,
         0, 0},
        {quick_label, 2, 50, 2, MAIL_DLG_HEIGHT, N_(" mail -s <subject> -c <cc> <to>"), 0, 0, 0,
         0, 0},
        NULL_QuickWidget};

    quick_widgets[2].str_result = &tmail_cc;
    quick_widgets[2].text = mail_cc_last ? mail_cc_last : "";
    quick_widgets[4].str_result = &tmail_subject;
    quick_widgets[4].text = mail_subject_last ? mail_subject_last : "";
    quick_widgets[6].str_result = &tmail_to;
    quick_widgets[6].text = mail_to_last ? mail_to_last : "";

    Quick_input.widgets = quick_widgets;

    if (quick_dialog (&Quick_input) != B_CANCEL) {
        g_free (mail_cc_last);
        g_free (mail_subject_last);
        g_free (mail_to_last);
        mail_cc_last = tmail_cc;
        mail_subject_last = tmail_subject;
        mail_to_last = tmail_to;
        pipe_mail (edit, mail_to_last, mail_subject_last, mail_cc_last);
    }
}


/*******************/
/* Word Completion */
/*******************/


/* find first character of current word */
static int edit_find_word_start (WEdit *edit, long *word_start, int *word_len)
{
    int i, c, last;

/* return if at begin of file */
    if (edit->curs1 <= 0)
        return 0;

    c = (unsigned char) edit_get_byte (edit, edit->curs1 - 1);
/* return if not at end or in word */
    if (isspace (c) || !(isalnum (c) || c == '_'))
        return 0;

/* search start of word to be completed */
    for (i = 2;; i++) {
/* return if at begin of file */
        if (edit->curs1 - i < 0)
            return 0;

        last = c;
        c = (unsigned char) edit_get_byte (edit, edit->curs1 - i);

        if (!(isalnum (c) || c == '_')) {
/* return if word starts with digit */
            if (isdigit (last))
                return 0;

            *word_start = edit->curs1 - (i - 1); /* start found */
            *word_len = i - 1;
            break;
        }
    }
/* success */
    return 1;
}


/* (re)set search parameters to the given values */
static void edit_set_search_parameters (int rs, int rb, int rr, int rw, int rc)
{
    replace_scanf = rs;
    replace_backwards = rb;
    replace_regexp = rr;
    replace_whole = rw;
    replace_case = rc;
}


#define MAX_WORD_COMPLETIONS 100        /* in listbox */

/* collect the possible completions */
static int
edit_collect_completions (WEdit *edit, long start, int word_len,
                          char *match_expr, struct selection *compl,
                          int *num)
{
    int len, max_len = 0, i, skip;
    char *bufpos;

    /* collect max MAX_WORD_COMPLETIONS completions */
    while (*num < MAX_WORD_COMPLETIONS) {
        /* get next match */
        start =
            edit_find (start - 1, (unsigned char *) match_expr, &len,
                       edit->last_byte,
                       edit_get_byte,
                       (void *) edit, 0);

        /* not matched */
        if (start < 0)
            break;

        /* add matched completion if not yet added */
        bufpos =
            &edit->
            buffers1[start >> S_EDIT_BUF_SIZE][start & M_EDIT_BUF_SIZE];
        skip = 0;
        for (i = 0; i < *num; i++) {
            if (strncmp
                (&compl[i].text[word_len], &bufpos[word_len],
                 max (len, compl[i].len) - word_len) == 0) {
                skip = 1;
                break;          /* skip it, already added */
            }
        }
        if (skip)
            continue;

        compl[*num].text = g_malloc (len + 1);
        compl[*num].len = len;
        for (i = 0; i < len; i++)
            compl[*num].text[i] = *(bufpos + i);
        compl[*num].text[i] = '\0';
        (*num)++;

        /* note the maximal length needed for the completion dialog */
        if (len > max_len)
            max_len = len;
    }
    return max_len;
}


/* let the user select its preferred completion */
static void
edit_completion_dialog (WEdit *edit, int max_len, int word_len,
                        struct selection *compl, int num_compl)
{
    int start_x, start_y, offset, i;
    char *curr = NULL;
    Dlg_head *compl_dlg;
    WListbox *compl_list;
    int compl_dlg_h;    /* completion dialog height */
    int compl_dlg_w;    /* completion dialog width */

    /* calculate the dialog metrics */
    compl_dlg_h = num_compl + 2;
    compl_dlg_w = max_len + 4;
    start_x = edit->curs_col + edit->start_col - (compl_dlg_w / 2);
    start_y = edit->curs_row + EDIT_TEXT_VERTICAL_OFFSET + 1;

    if (start_x < 0)
        start_x = 0;
    if (compl_dlg_w > COLS)
        compl_dlg_w = COLS;
    if (compl_dlg_h > LINES - 2)
        compl_dlg_h = LINES - 2;

    offset = start_x + compl_dlg_w - COLS;
    if (offset > 0)
        start_x -= offset;
    offset = start_y + compl_dlg_h - LINES;
    if (offset > 0)
        start_y -= (offset + 1);

    /* create the dialog */
    compl_dlg =
        create_dlg (start_y, start_x, compl_dlg_h, compl_dlg_w,
                    dialog_colors, NULL, "[Completion]", NULL,
                    DLG_COMPACT);

    /* create the listbox */
    compl_list =
        listbox_new (1, 1, compl_dlg_w - 2, compl_dlg_h - 2, NULL);

    /* add the dialog */
    add_widget (compl_dlg, compl_list);

    /* fill the listbox with the completions */
    for (i = 0; i < num_compl; i++)
        listbox_add_item (compl_list, 0, 0, compl[i].text, NULL);

    /* pop up the dialog */
    run_dlg (compl_dlg);

    /* apply the choosen completion */
    if (compl_dlg->ret_value == B_ENTER) {
        listbox_get_current (compl_list, &curr, NULL);
        if (curr)
            for (curr += word_len; *curr; curr++)
                edit_insert (edit, *curr);
    }

    /* destroy dialog before return */
    destroy_dlg (compl_dlg);
}


/*
 * Complete current word using regular expression search
 * backwards beginning at the current cursor position.
 */
void
edit_complete_word_cmd (WEdit *edit)
{
    int word_len = 0, i, num_compl = 0, max_len;
    long word_start = 0;
    char *bufpos;
    char *match_expr;
    struct selection compl[MAX_WORD_COMPLETIONS];       /* completions */

    /* don't want to disturb another search */
    int old_rs = replace_scanf;
    int old_rb = replace_backwards;
    int old_rr = replace_regexp;
    int old_rw = replace_whole;
    int old_rc = replace_case;

    /* search start of word to be completed */
    if (!edit_find_word_start (edit, &word_start, &word_len))
        return;

    /* prepare match expression */
    bufpos = &edit->buffers1[word_start >> S_EDIT_BUF_SIZE]
        [word_start & M_EDIT_BUF_SIZE];
    match_expr = g_strdup_printf ("%.*s[a-zA-Z_0-9]+", word_len, bufpos);

    /* init search: backward, regexp, whole word, case sensitive */
    edit_set_search_parameters (0, 1, 1, 1, 1);

    /* collect the possible completions              */
    /* start search from curs1 down to begin of file */
    max_len =
        edit_collect_completions (edit, word_start, word_len, match_expr,
                                  (struct selection *) &compl, &num_compl);

    if (num_compl > 0) {
        /* insert completed word if there is only one match */
        if (num_compl == 1) {
            for (i = word_len; i < compl[0].len; i++)
                edit_insert (edit, *(compl[0].text + i));
        }
        /* more than one possible completion => ask the user */
        else {
            /* !!! usually only a beep is expected and when <ALT-TAB> is !!! */
            /* !!! pressed again the selection dialog pops up, but that  !!! */
            /* !!! seems to require a further internal state             !!! */
            /*beep (); */

            /* let the user select the preferred completion */
            edit_completion_dialog (edit, max_len, word_len,
                                    (struct selection *) &compl,
                                    num_compl);
        }
    }

    g_free (match_expr);
    /* release memory before return */
    for (i = 0; i < num_compl; i++)
        g_free (compl[i].text);

    /* restore search parameters */
    edit_set_search_parameters (old_rs, old_rb, old_rr, old_rw, old_rc);
}