/* cpascal.h: implement various bits of standard and other Pascal that
   we use in the change files.  Public domain.
   
   This is the top-level include file for all the web2c-generated C
   programs except TeX and Metafont themselves, which use texmf.h.  It's
   not included by the web2c programs, though.  */

#ifndef CPASCAL_H
#define CPASCAL_H

/* We must include this first, to resolve many C issues.  */
#include "config.h"

/* We only use getopt in the applications, not in web2c itself.  */
#include <kpathsea/getopt.h>

/* Almost everybody needs path searching.  May as well always include
   them and simplify the change files.  */
#include <kpathsea/progname.h>
#include <kpathsea/proginit.h>
#include <kpathsea/tex-file.h>

/* Help messages.  */
#include "help.h"

/* Pieces of predefined Pascal web2c doesn't convert.  */

/* Absolute value.  Without the casts to integer here, the Ultrix and
   AIX compilers (at least) produce bad code (or maybe it's that I don't
   understand all the casting rules in C) for tests on memory fields. 
   Specifically, a test in diag_round (in Metafont) on a quarterword
   comes out differently without the cast, thus causing the trap test to
   fail.  (A path at line 86 is constructed slightly differently).  */
/* If the system had an abs #define already, get rid of it.  */
#undef abs
#define abs(x) ((integer)(x) >= 0 ? (integer)(x) : (integer)-(x))

#define chr(x)		(x)
#define ord(x)		(x)
#define odd(x)		((x) & 1)
#define round(x)	zround ((double) (x))
#define trunc(x)	((integer) (x))
#define input stdin
#define output stdout
#define maxint INTEGER_MAX
#define nil NULL

#define floorunscaled(i) ((i)>>16)
#define floorscaled(i) ((i)&(-65536))
#define roundunscaled(i) (((i>>15)+1)>>1)
#define roundfraction(i) (((i>>11)+1)>>1)
#ifndef TeX
/* In TeX, the half routine is always applied to positive integers.
   In MF and MP, it isn't; therefore, we can't portably use the C shift
   operator -- whether zeros or the sign bit will be shifted in on
   negative left operands is implementation-defined.
   
   It might be worth going through MF and using halfp where possible, as
   in MP.  */
#define half(i) ( ((i)<0) ? (((i)+1)>>1) : ((i)>>1) )
#endif
#define halfp(i) ((i) >> 1)

/* Standard Pascal file routines.  These are used for both binary and
   text files, but binary is more common.  If you want it 100% right,
   fix the change files to pass the fopen mode to reset in all cases and
   send me the changes; it doesn't matter for Unix, so I'm not going to
   spend any more time on it.  */
#define reset(f,n) f = xfopen (n, FOPEN_R_MODE)
#define rewrite(f,n) f = xfopen (n, FOPEN_W_MODE)
#define resetbin(f,n) f = xfopen (n, FOPEN_RBIN_MODE)
#define rewritebin(f,n) f = xfopen (n, FOPEN_WBIN_MODE)

#define read(f,b) ((b) = getc (f))
#define readln(f) { register c; while ((c = getc (f)) != '\n' && c != EOF); }

/* We hope this will be efficient than the `x = x - 1' that decr would
   otherwise be translated to.  Likewise for incr.  */
#define decr(x) --(x)
#define incr(x) ++(x)

/* `real' is used for noncritical floating-point stuff.  */
typedef double real;

/* C doesn't need to distinguish between text files and other files.  */
typedef FILE *text;

/* Extra stuff used in various change files for various reasons.  */

/* Pascal has no address-of operator, and we need pointers to integers
   to set up the option table.  */
#define addressof(x) (&(x))

/* So dvicopy can use stdin/stdout.  */
#ifdef WIN32
#include <io.h>
#define makebinaryfile(arg) (_setmode(fileno(arg), _O_BINARY), arg)
#else
#ifdef __DJGPP__
#include <io.h>
/* Don't set console device to binary.  */
#define makebinaryfile(arg) ((!isatty(fileno(arg)) && setmode(fileno(arg), O_BINARY)), arg)
#else
#define makebinaryfile(arg) (arg)
#endif
#endif

/* It's not worth fixing fixwrites to handle Pascal-style n:m write
   specifiers for reals, so the change files call print_real instead.  */
#define printreal(r,n,m) fprintreal (stdout, r, n, m)

/* Write the byte X to the file F.  */
#define putbyte(x,f) \
 do { if (putc ((char) (x) & 255, f) == EOF) \
        FATAL1 ("putbyte(%ld) failed", (long) x); } while (0)

/* To work around casting problems.  */
#define toint(x) ((integer) (x))

/* For throwing away input from the file F.  */
#define vgetc(f) (void) getc (f)

/* The fixwrites program outputs this, for diagnostics and such, that
   aren't worth checking the return value on.  */
#define Fputs(f,s) (void) fputs (s, f)

/* `aopenin' is used for all kinds of input text files, so it
   needs to know what path to use.  Used by BibTeX, MF, TeX.  */
#define aopenin(f,p) open_input (&(f), p, FOPEN_R_MODE)
#define aopenout(f)  open_output (&(f), FOPEN_W_MODE)

/* For faking arrays in tftopl.  */
typedef unsigned char *pointertobyte;
#define casttobytepointer(e) ((pointertobyte) e)

/* Write out elements START through END of BUF to the file F.  For gftodvi.  */
#define writechunk(f, buf, start, end) \
  (void) fwrite (&buf[start], sizeof (buf[start]), end - start + 1, f)

/* PatGen 2 uses this.  */
#define input2ints(a,b) zinput2ints (&a, &b)

/* We need this only if TeX is being debugged.  */
#define input3ints(a,b,c) zinput3ints (&a, &b, &c)

/* BibTeX needs this to dynamically reallocate arrays.  Too bad we can't
   rely on stringification, or we could avoid the ARRAY_NAME arg.
   Actually allocate one more than requests, so we can index the last
   entry, as Pascal wants to do.  */
#define BIBXRETALLOC(array_name, array_var, type, size_var, new_size) do { \
  fprintf (logfile, "Reallocated %s (elt_size=%d) to %ld items from %ld.\n", \
           array_name, (int) sizeof (type), new_size, size_var); \
  XRETALLOC (array_var, new_size + 1, type); \
  size_var = new_size; \
} while (0)
  
/* Need precisely int for getopt, etc. */
#define cinttype int

/* Need this because web2c doesn't translate `var1,var2:^char' correctly
   -- var2 lacks the *.  */
#define cstring string

/* Not all C libraries have fabs, so we'll roll our own.  */
#undef fabs
#define fabs(x) ((x) >= 0.0 ? (x) : -(x))

/* TeX et al. have a variable free, but we also need the C routine.  */
#define libcfree free

/* Tangle removes underscores from names.  Put them back for things that
   are defined in C with _'s.  */
#define extendfilename	extend_filename
#define findsuffix	find_suffix
#define FOPENRBINMODE	FOPEN_RBIN_MODE
#define FOPENRMODE	FOPEN_R_MODE
#define getoptlongonly	getopt_long_only
#define hasarg		has_arg
#define ISDIRSEP	IS_DIR_SEP
#define kpsebibformat	kpse_bib_format
#define kpsebstformat	kpse_bst_format
#define kpsefindfile	kpse_find_file
#define kpsefindmf	kpse_find_mf
#define kpsefindmft	kpse_find_mft
#define kpsefindtex	kpse_find_tex
#define kpsefindtfm	kpse_find_tfm
#define kpsefindvf	kpse_find_vf
#define kpseinitprog	kpse_init_prog
#define kpsesetprogname kpse_set_progname
#define kpsegfformat	kpse_gf_format
#define kpsemaketexdiscarderrors kpse_make_tex_discard_errors
#define kpsemfformat	kpse_mf_format
#define kpsemftformat	kpse_mft_format
#define kpseopenfile	kpse_open_file
#define kpsepkformat	kpse_pk_format
#define kpsetfmformat	kpse_tfm_format
#define kpsevfformat	kpse_vf_format
#define makesuffix	make_suffix
#define removesuffix	remove_suffix

/* We need a new type for the argument parsing, too.  */
typedef struct option getoptstruct;

/* We never need the `link' system call, which may be declared in
   <unistd.h>, but we do have variables named `link' in the webs.  */
#undef link
#define link link_var

/* Throw away VMS' library routine `getname', as WEB uses that name.  */
#ifdef VMS
#undef getname
#define getname vms_getname
#endif

/* Declarations for the routines we provide ourselves in lib/.  */

extern string basenamechangesuffix P3H(const_string,const_string,const_string);
extern string chartostring P1H(char);
extern boolean eof P1H(FILE *);
extern boolean eoln P1H(FILE *);
extern void fprintreal P4H(FILE *, double, int, int);
extern integer inputint P1H(FILE *);
extern void printversionandexit P3H(const_string, const_string, const_string);
extern void zinput2ints P2H(integer *, integer *);
extern void zinput3ints P3H(integer *, integer *, integer *);
extern integer zround P1H(double);

/* main.c */
extern int argc;
extern string *argv;
extern string cmdline P1H(int);
extern void mainbody P1H(void); /* generated by web2c */

/* openclose.c */
extern boolean open_input P3H(FILE **, int, const_string fopen_mode);
extern boolean open_output P2H(FILE **, const_string fopen_mode);
extern void aclose P1H(FILE *);

/* version.c */
extern string versionstring;

#endif /* not CPASCAL_H */
