/* ncdu - NCurses Disk Usage 
    
  Copyright (c) 2007 Yoran Heling

  Permission is hereby granted, free of charge, to any person obtaining
  a copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:
  
  The above copyright notice and this permission notice shall be included
  in all copies or substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

*/


#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <ctype.h>
#include <limits.h>
#include <errno.h>
#include <fnmatch.h>

#include <ncurses.h>
#include <form.h>

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <dirent.h>

/* PATH_MAX 260 on Cygwin is too small for /proc/registry */
#ifdef __CYGWIN__
# if PATH_MAX < 1024
#  undef PATH_MAX
#  define PATH_MAX 1024
# endif
#endif

/* get PATH_MAX */
#ifndef PATH_MAX
# ifdef _POSIX_PATH_MAX
#  define PATH_MAX _POSIX_PATH_MAX
# else
#  define PATH_MAX 4096
# endif
#endif
/* and LINK_MAX */
#ifndef LINK_MAX
# ifdef _POSIX_LINK_MAX
#  define LINK_MAX _POSIX_LINK_MAX
# else
#  define LINK_MAX 32
# endif
#endif
/* check for S_ISLNK */
#ifndef S_ISLNK
# ifndef S_IFLNK
#  define S_IFLNK 0120000
# endif
# define S_ISLNK(x) (x & S_IFLNK)
#endif

/* There are many ways to test the endianness on a system, however, I couldn't
 * find a universal way to do this, so I used this small hack that should work
 * on any system. */
static unsigned int endian_test = 1;
#define IS_BIG_ENDIAN (!(*(char *) &endian_test))

/* check nccreate in util.c for more info on these defines */
#define ncaddstr(r, c, s) mvaddstr(subwinr+(r), subwinc+(c), s)
#define  ncaddch(r, c, s)  mvaddch(subwinr+(r), subwinc+(c), s)


/*
 *    G L O B A L   F L A G S
 */
/* File Flags (struct dir -> flags) */
#define FF_DIR    0x01
#define FF_FILE   0x02
#define FF_ERR    0x04 /* error while reading this item */
#define FF_OTHFS  0x08 /* excluded because it was an other filesystem */
#define FF_EXL    0x10 /* excluded using exlude patterns */
#define FF_SERR   0x20 /* error in subdirectory */
#define FF_BSEL   0x40 /* selected */
#define FF_PAR    0x80 /* reference to parent directory (hack - only used in browser.c) */

/* Settings Flags (int sflags) */
#define SF_SMFS   0x01 /* same filesystem */
#define SF_SI     0x02 /* use powers of 1000 instead of 1024 */
#define SF_IGNS   0x04 /* ignore too small terminal sizes */
#define SF_NOCFM  0x08 /* don't confirm file deletion */
#define SF_IGNE   0x10 /* ignore errors when deleting */

/* Browse Flags (int bflags) */
#define BF_NAME   0x01
#define BF_SIZE   0x02
#define BF_NDIRF  0x04 /* Normally, dirs before files, setting this disables it */
#define BF_DESC   0x08
#define BF_HIDE   0x10 /* don't show hidden files... */
#define BF_SORT   0x20 /* no need to resort, list is already in correct order */
#define BF_AS     0x40 /* show apparent sizes instead of disk usage */

/* Export Flags */
#define EF_DIR    0x01
#define EF_FILE   0x02
#define EF_ERR    0x04
#define EF_OTHFS  0x08
#define EF_EXL    0x10



/*
 *    S T R U C T U R E S
 */
struct dir {
  struct dir *parent, *next, *sub;
  unsigned char *name;
  off_t size, asize;
  unsigned long items;
  unsigned char flags;
}; 


/*
 *    G L O B A L   V A R I A B L E S
 *
 * (all defined in main.c)
 */
/* main directory data */
extern struct dir *dat;
/* updated when window is resized */
extern int winrows, wincols;
/* global settings */
extern char sdir[PATH_MAX], *s_export;
extern int sflags, bflags, sdelay, bgraph;
/* used for creating windows */
extern int subwinr, subwinc;


/*
 *    G L O B A L   F U N C T I O N S
 */
/* util.c */
extern char *cropdir(const char *, int);
extern char *cropsize(const off_t);
extern char *fullsize(const off_t);
extern void ncresize(void);
extern void nccreate(int, int, char *);
extern void ncprint(int, int, char *, ...);
extern struct dir * freedir(struct dir *);
extern char *getpath(struct dir *, char *);
/* settings.c */
extern int settingsWin(void);
/* calc.c */
extern struct dir *showCalc(char *);
/* browser.c */
extern void drawBrowser(int);
extern void showBrowser(void);
/* help.c */
extern void showHelp(void);
/* delete.c */
extern struct dir *showDelete(struct dir *);
/* exclude.c */
extern void addExclude(char *);
extern int addExcludeFile(char *);
extern int matchExclude(char *);
/* export.c */
extern void exportFile(char *, struct dir *);
extern struct dir *showImport(char *);