/****************************************************************************\
 Part of the XeTeX typesetting system
 copyright (c) 1994-2005 by SIL International
 written by Jonathan Kew

Permission is hereby granted, free of charge, to any person obtaining  
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"Software"), to deal in the Software without restriction, including  
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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.

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Except as contained in this notice, the name of SIL International  
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\****************************************************************************/

/*
	xdv2pdf_main
	
	Main file for xdv2pdf
	Written in plain C for easier linkage to kpathsea library
*/

#define MAC_OS_X_VERSION_MIN_REQUIRED	1020

#include <kpathsea/config.h>

#include <kpathsea/c-fopen.h>
#include <kpathsea/c-pathch.h>
#include <stdarg.h>
#include <kpathsea/cnf.h>
#include <kpathsea/concatn.h>
#include <kpathsea/default.h>
#include <kpathsea/expand.h>
#include <kpathsea/fontmap.h>
#include <kpathsea/paths.h>
#include <kpathsea/pathsearch.h>
#include <kpathsea/tex-file.h>
#include <kpathsea/tex-make.h>
#include <kpathsea/variable.h>

#include "xdv_kpse_formats.h"

/* The program name, for `.PROG' construct in texmf.cnf.  (-program) */
string progname = NULL;

extern int	xdv2pdf(int argc, char** argv);

#ifdef XDV2PDF_OLD_FORMATS

#ifndef DEFAULT_OTFFONTS
#define DEFAULT_OTFFONTS ".:/usr/local/teTeX/share/texmf/fonts/otf//:/usr/TeX/texmf/fonts/otf//"
#endif

#define INIT_FORMAT(text, default_path, envs) \
  FMT_INFO.type = text; \
  init_path (&FMT_INFO, default_path, envs, NULL)

#define OTFFONTS_ENVS "OTFFONTS"

#define TFM_ENVS "TFMFONTS", "TEXFONTS"
#define CNF_ENVS "TEXMFCNF"
#define DB_ENVS "TEXMFDBS"
#define DVIPS_CONFIG_ENVS "TEXCONFIG"
#define FONTMAP_ENVS "TEXFONTMAPS", "TEXFONTS", DVIPS_CONFIG_ENVS /* try TEXCONFIG for teTeX 2 */
#define TEX_PS_HEADER_ENVS "TEXPSHEADERS", "PSHEADERS"
#define ENC_ENVS "ENCFONTS", "TEXFONTS", TEX_PS_HEADER_ENVS
#define TYPE1_ENVS "T1FONTS", "T1INPUTS", "TEXFONTS", TEX_PS_HEADER_ENVS

#define FMT_INFO kpse_format_info[format]
/* Call kpse_set_add_suffixes.  */
#define SUFFIXES(args) kpse_set_suffixes(format, false, args, NULL)
#define ALT_SUFFIXES(args) kpse_set_suffixes(format, true, args, NULL)

/* Macro subroutines for `init_path'.  TRY_ENV checks if an envvar ENAME
   is set and non-null, and sets var to ENAME if so.  */
#define TRY_ENV(ename) do { \
  string evar = ename; \
} while (0)

/* And EXPAND_DEFAULT calls kpse_expand_default on try_path and the
   present info->path.  */
#define EXPAND_DEFAULT(try_path, source_string)			\
  if (try_path) {						\
      info->raw_path = try_path;				\
      info->path = kpse_expand_default (try_path, info->path);	\
      info->path_source = source_string;			\
  }

static string
remove_dbonly(const_string path)
{
  string ret = XTALLOC(strlen (path) + 1, char), q=ret;
  const_string p=path;
  boolean new_elt=true;

  while (*p) {
    if (new_elt && *p && *p == '!' && *(p+1) == '!')
      p += 2;
    else {
      new_elt = (*p == ENV_SEP);
      *q++ = *p++;
    }
  }
  *q = '\0';
  return(ret);
}

/* Find the final search path to use for the format entry INFO, given
   the compile-time default (DEFAULT_PATH), and the environment
   variables to check (the remaining arguments, terminated with NULL).
   We set the `path' and `path_source' members of INFO.  The
   `client_path' member must already be set upon entry.  */

static void
init_path(kpse_format_info_type *info, const_string default_path, ...)
{
  string env_name;
  string var = NULL;
  va_list ap;

  va_start (ap, default_path);
  
  info->default_path = default_path;

  /* First envvar that's set to a nonempty value will exit the loop.  If
     none are set, we want the first cnf entry that matches.  Find the
     cnf entries simultaneously, to avoid having to go through envvar
     list twice -- because of the PVAR?C macro, that would mean having
     to create a str_list and then use it twice.  Yuck.  */
  while ((env_name = va_arg (ap, string)) != NULL) {
    /* Since sh doesn't like envvar names with `.', check PATH_prog
       as well as PATH.prog.  */
    if (!var) {
      /* Try PATH.prog. */
      string evar = concat3 (env_name, ".", kpse_program_name);
      string env_value = getenv (evar);
      if (env_value && *env_value) {
        var = evar;
      } else {
        free (evar);
        /* Try PATH_prog. */
        evar = concat3 (env_name, "_", kpse_program_name);
        env_value = getenv (evar);
        if (env_value && *env_value) {
          var = evar;
        } else {
          free (evar);
          /* Try simply PATH.  */
          env_value = getenv (env_name);
          if (env_value && *env_value) {
            var = env_name;        
          }
        }
      }
    }
    
    /* If we are initializing the cnf path, don't try to get any
       values from the cnf files; that's infinite loop time.  */
    if (!info->cnf_path && info != &kpse_format_info[kpse_cnf_format])
      info->cnf_path = kpse_cnf_get (env_name);
      
    if (var && info->cnf_path)
      break;
  }
  va_end (ap);
  
  /* Expand any extra :'s.  For each level, we replace an extra : with
     the path at the next lower level.  For example, an extra : in a
     user-set envvar should be replaced with the path from the cnf file.
     things are complicated because none of the levels above the very
     bottom are guaranteed to exist.  */

  /* Assume we can reliably start with the compile-time default.  */
  info->path = info->raw_path = info->default_path;
  info->path_source = "compile-time paths.h";

  EXPAND_DEFAULT (info->cnf_path, "texmf.cnf");
  EXPAND_DEFAULT (info->client_path, "program config file");
  if (var)
    EXPAND_DEFAULT (getenv (var), concat (var, " environment variable"));
  EXPAND_DEFAULT (info->override_path, "application override variable");
  info->path = kpse_brace_expand (info->path);
}

#endif /* XDV2PDF_OLD_FORMATS */

int
main(int argc, char** argv)
{
#ifdef XDV2PDF_OLD_FORMATS

	kpse_file_format_type	format;

	kpse_set_program_name (argv[0], progname);

    /* It seems to be critical that I do a kpse_cnf_get to trigger the reading of texmf.cnf files
        BEFORE the INIT_FORMAT stuff below. I don't really understand all the interactions
        of search paths, config files, etc., but for now this is working for me. */
    kpse_cnf_get("TETEXDIR");

    format = kpse_cnf_format;
    INIT_FORMAT ("cnf", DEFAULT_TEXMFCNF, CNF_ENVS);
    SUFFIXES (".cnf");

    format = kpse_db_format;
    INIT_FORMAT ("ls-R", DEFAULT_TEXMFDBS, DB_ENVS);
    SUFFIXES ("ls-R");
    FMT_INFO.path = remove_dbonly (FMT_INFO.path);

    format = xdv_kpse_pfb_format;
	INIT_FORMAT ("type1 fonts", DEFAULT_T1FONTS, TYPE1_ENVS);
	FMT_INFO.binmode = true;
	FMT_INFO.suffix_search_only = true;
	SUFFIXES (".pfb");

    format = xdv_kpse_otf_format;
	INIT_FORMAT ("otf fonts", DEFAULT_OTFFONTS, OTFFONTS_ENVS);
	FMT_INFO.binmode = true;
	FMT_INFO.suffix_search_only = true;
	SUFFIXES (".otf");

    format = xdv_kpse_tfm_format;
	INIT_FORMAT ("tfm", DEFAULT_TFMFONTS, TFM_ENVS);
	FMT_INFO.binmode = true;
	FMT_INFO.suffix_search_only = true;
	SUFFIXES (".tfm");

    format = xdv_kpse_font_map_format;
	INIT_FORMAT ("map", DEFAULT_TEXFONTMAPS, FONTMAP_ENVS);
	FMT_INFO.suffix_search_only = true;
	SUFFIXES (".map");

    format = xdv_kpse_enc_format;
	INIT_FORMAT ("enc files", DEFAULT_ENCFONTS, ENC_ENVS);
	FMT_INFO.suffix_search_only = true;
	SUFFIXES (".enc");

#else /* not XDV2PDF_OLD_FORMATS */

    kpse_set_program_name (argv[0], progname);
    
    /* Initialize type1 search path and change the suffix list.  */
    kpse_init_format (kpse_type1_format);
    kpse_set_suffixes (kpse_type1_format, false, ".pfb", NULL);

#endif /* not XDV2PDF_OLD_FORMATS */

	return xdv2pdf(argc, argv);
}