busybox

/* vi: set sw=4 ts=4: */

/*

 * Copyright (c) 2002 by David I. Bell

 * Permission is granted to use, distribute, or modify this source,

 * provided that this copyright notice remains intact.

 *

 * The "ed" built-in command (much simplified)

 */

​

//config:config ED

//config:   bool "ed"

//config:   default y

//config:   help

//config:     The original 1970's Unix text editor, from the days of teletypes.

//config:     Small, simple, evil. Part of SUSv3. If you're not already using

//config:     this, you don't need it.

​

//kbuild:lib-$(CONFIG_ED) += ed.o

​

//applet:IF_ED(APPLET(ed, BB_DIR_BIN, BB_SUID_DROP))

​

//usage:#define ed_trivial_usage ""

//usage:#define ed_full_usage ""

​

#include "libbb.h"

#include "common_bufsiz.h"

​

typedef struct LINE {

    struct LINE *next;

    struct LINE *prev;

    int len;

    char data[1];

} LINE;

​

​

#define searchString bb_common_bufsiz1

​

enum {

    USERSIZE = COMMON_BUFSIZE > 1024 ? 1024

             : COMMON_BUFSIZE - 1, /* max line length typed in by user */

    INITBUF_SIZE = 1024, /* initial buffer size */

};

​

struct globals {

    int curNum;

    int lastNum;

    int bufUsed;

    int bufSize;

    LINE *curLine;

    char *bufBase;

    char *bufPtr;

    char *fileName;

    LINE lines;

    smallint dirty;

    int marks[26];

};

#define G (*ptr_to_globals)

#define curLine            (G.curLine           )

#define bufBase            (G.bufBase           )

#define bufPtr             (G.bufPtr            )

#define fileName           (G.fileName          )

#define curNum             (G.curNum            )

#define lastNum            (G.lastNum           )