/*
 * SHELL.H
 *
 * (c)1986 Matthew Dillon     9 October 1986
 *
 *
 * SHELL include file.. contains shell parameters and extern's
 *
 *
 */

#include <exec/types.h>

#define MAXAV        128            /* Max. # arguments             */
#define MAXSRC       5              /* Max. # of source file levels */
#define MAXIF        10             /* Max. # of if levels          */
#define MAXALIAS     20             /* Max. # of alias levels       */

#define LEVEL_SET    0              /* which variable list to use   */
#define LEVEL_ALIAS  1
#define LEVEL_LABEL  2

#define V_PROMPT     "_prompt"      /* your prompt (ascii command)   */
#define V_HIST       "_history"     /* set history depth (value)     */
#define V_HISTNUM    "_histnum"     /* set history numbering var     */
#define V_DEBUG      "_debug"       /* set debug mode                */
#define V_VERBOSE    "_verbose"     /* set verbose for source files  */
#define V_STAT       "_maxerr"      /* worst return value to date    */
#define V_LASTERR    "_lasterr"     /* return value from last comm.  */
#define V_CWD        "_cwd"         /* current directory             */
#define V_EXCEPT     "_except"      /* "nnn;command"                 */
#define V_PASSED     "_passed"      /* passed arguments to source fle*/
#define V_PATH       "_path"        /* path prefix,prefix,prefix..   */


            /* EXECOM.C defines */

#define FL_DOLLAR    0x01  /* One of the following */
#define FL_BANG      0x02
#define FL_PERCENT   0x04
#define FL_QUOTE     0x08
#define FL_IDOLLAR   0x10  /* Any or all of the following may be set */
#define FL_EOC       0x20
#define FL_EOL       0x40
#define FL_OVERIDE   0x80
#define FL_WILD      0x100
#define FL_MASK      (FL_DOLLAR|FL_BANG|FL_PERCENT|FL_QUOTE)


#define VERSION   "V2.04  (c)1986 Matthew Dillon. 22Oct86"

#ifndef NULL
#define NULL 0L
#endif

#define CHECKBREAK() ( breakcheck() ? (printf("^C\n"),1) : 0)


struct HIST {
   struct HIST *next, *prev;     /* doubly linked list */
   char *line;                   /* line in history    */
};

struct PERROR {
   short errnum;                 /* Format of global error lookup */
   char *errstr;
};

struct DPTR {                    /* Format of directory fetch pointer */
   struct FileLock *lock;        /* lock on directory   */
   struct FileInfoBlock *fib;    /* mod'd fib for entry */
};

extern struct HIST *H_head, *H_tail;
extern struct PERROR Perror[];
extern struct DPTR *dopen();
extern char *set_var(), *get_var(), *next_word();
extern char *get_history(), *compile_av();
extern char *malloc(), *strcpy(), *strcat(), *AllocMem(), *gets(), *Ogets();
extern char **expand(), *FindIt();


extern char *av[];
extern char *Current;
extern short H_len, H_tail_base, H_stack;
extern short E_stack;
extern short Src_stack, If_stack;
extern short ac;
extern short Debug, Verbose, Disable, Quit;
extern long Lastresult;
extern short Exec_abortline, Exec_ignoreresult;
extern short S_histlen;
extern long Uniq;
extern long Cin, Cout, Cerr, Cout_append;
extern char *Cin_name, *Cout_name;
extern char  Cin_type,  Cout_type;  /* these variables are in transition */
extern char *Pipe1, *Pipe2;

extern int  Src_base[MAXSRC];
extern long Src_pos[MAXSRC];
extern char If_base[MAXIF];