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//========================================================================
//
// FileSpec.cc
//
// All changes made under the Poppler project to this file are licensed
// under GPL version 2 or later
//
// Copyright (C) 2008-2009 Carlos Garcia Campos <carlosgc@gnome.org>
// Copyright (C) 2009 Kovid Goyal <kovid@kovidgoyal.net>
//
// To see a description of the changes please see the Changelog file that
// came with your tarball or type make ChangeLog if you are building from git
//
//========================================================================

//========================================================================
//
// Most of the code from Link.cc and PSOutputDev.cc
//
// Copyright 1996-2003 Glyph & Cog, LLC 
//
//========================================================================

#include <config.h>

#include "FileSpec.h"

GBool getFileSpecName (Object *fileSpec, Object *fileName)
{
  if (fileSpec->isString()) {
    fileSpec->copy(fileName);
    return gTrue;
  }
  
  if (fileSpec->isDict()) {
    fileSpec->dictLookup("UF", fileName);
    if (fileName->isString()) {
      return gTrue;
    }
    fileName->free();
    fileSpec->dictLookup("F", fileName);
    if (fileName->isString()) {
      return gTrue;
    }
    fileName->free();
    fileSpec->dictLookup("DOS", fileName);
    if (fileName->isString()) {
      return gTrue;
    }
    fileName->free();
    fileSpec->dictLookup("Mac", fileName);
    if (fileName->isString()) {
      return gTrue;
    }
    fileName->free();
    fileSpec->dictLookup("Unix", fileName);
    if (fileName->isString()) {
      return gTrue;
    }
    fileName->free();
  }
  return gFalse;
}

GBool getFileSpecNameForPlatform (Object *fileSpec, Object *fileName)
{
  if (fileSpec->isString()) {
    fileSpec->copy(fileName);
    return gTrue;
  }

  if (fileSpec->isDict()) {
    if (!fileSpec->dictLookup("UF", fileName)->isString ()) {
      fileName->free();
      if (!fileSpec->dictLookup("F", fileName)->isString ()) {
        fileName->free();
#ifdef _WIN32
	char *platform = "DOS";
#else
	char *platform = "Unix";
#endif
	if (!fileSpec->dictLookup(platform, fileName)->isString ()) {
	  fileName->free();
	  error(-1, "Illegal file spec");
	  return gFalse;
	}
      }
    }
  } else {
    error(-1, "Illegal file spec");
    return gFalse;
  }

  // system-dependent path manipulation
#ifdef _WIN32
  int i, j;
  GooString *name = fileName->getString();
  // "//...."             --> "\...."
  // "/x/...."            --> "x:\...."
  // "/server/share/...." --> "\\server\share\...."
  // convert escaped slashes to slashes and unescaped slashes to backslashes
  i = 0;
  if (name->getChar(0) == '/') {
    if (name->getLength() >= 2 && name->getChar(1) == '/') {
      name->del(0);
      i = 0;
    } else if (name->getLength() >= 2 &&
	       ((name->getChar(1) >= 'a' && name->getChar(1) <= 'z') ||
		(name->getChar(1) >= 'A' && name->getChar(1) <= 'Z')) &&
	       (name->getLength() == 2 || name->getChar(2) == '/')) {
      name->setChar(0, name->getChar(1));
      name->setChar(1, ':');
      i = 2;
    } else {
      for (j = 2; j < name->getLength(); ++j) {
        if (name->getChar(j-1) != '\\' &&
	    name->getChar(j) == '/') {
	  break;
	}
      }
      if (j < name->getLength()) {
        name->setChar(0, '\\');
	name->insert(0, '\\');
	i = 2;
      }
    }
  }
  for (; i < name->getLength(); ++i) {
    if (name->getChar(i) == '/') {
      name->setChar(i, '\\');
    } else if (name->getChar(i) == '\\' &&
	       i+1 < name->getLength() &&
	       name->getChar(i+1) == '/') {
      name->del(i);
    }
  }
#endif /* _WIN32 */

  return gTrue;
}