#ifndef _FORMAT_H_ee493d0f_
#define _FORMAT_H_ee493d0f_

#include "message.h"
#include "profile.h"

struct format;
typedef struct format FORMAT;

/* Look up a format in the profile, tagged by the second arg; third arg is
   fallback program text in case no other program can be found.  Fourth and
   further args specify extensions; they take the form of keys, which are
   EXT_xxx constants defined here.  The list must be terminated with a key
   value of EXT_END. */
extern FORMAT *format_program(PROFILE *, const char *, const char *, ...);
#define EXT_END        0
#define EXT_WIDTH      1
#define EXT_HEIGHT     2
#define EXT_UNIXFROM   3
#define EXT_HDRRESET   4
#define EXT_HDRGET     5
#define EXT_HDRMATCH   6
#define EXT_BODYLINE   7
#define EXT_OUTSTRING  8
#define EXT_FILTER     9
#define EXT_DUMPBODY  10
#define EXT__BIT(x) (1U<<((x)-1)) /* EXT_xxx constant to bitmask bit */
typedef unsigned short int EXT__T; /* type to hold EXT__BIT bitmask */

/* Run a format program.  If third arg is non-nil, when the program exits
   a string is expected on TOS and this function is called with it; if
   an error occurs and the fourth arg is non-nil, it is called with a string
   describing the error.  Fifth arg is a cookie passed to callbacks.  Sixth
   and later args specify options.  These options can be: */
/* Must be present at end of list */
#define FOPT_END   0
/* Following arg: fd to use for @outstring/@filter/@dumpbody; if not
   specified, those will produce run-time errors */
#define FOPT_OUTFD 1
/* Following args: int (N), then FMT_STACK[N].  Pre-loads stack from the
   FMT_STACK structures; [0] pushed first, then [1], etc, to [N-1]. */
#define FOPT_STACK 2
extern void format_run(FORMAT *, MESSAGE *, void (*)(const char *, void *), void (*)(const char *, void *), void *, ...);
typedef struct fmt_stack FMT_STACK;
struct fmt_stack {
  unsigned char type;
#define FOS_T_INTEGER 1
#define FOS_T_STRING  2
  union {
    int i;
    char *s; /* will be strdup()ed */
    } u;
  } ;

#endif