/*============================================================================
  KWSys - Kitware System Library
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#ifndef itksys_System_h
#define itksys_System_h

#include <itksys/Configure.h>

/* Redefine all public interface symbol names to be in the proper
   namespace.  These macros are used internally to kwsys only, and are
   not visible to user code.  Use kwsysHeaderDump.pl to reproduce
   these macros after making changes to the interface.  */
#if !defined(KWSYS_NAMESPACE)
# define kwsys_ns(x) itksys##x
# define kwsysEXPORT itksys_EXPORT
#endif
#if !itksys_NAME_IS_KWSYS
# define kwsysSystem_Parse_CommandForUnix             kwsys_ns(System_Parse_CommandForUnix)
# define kwsysSystem_Shell_GetArgumentForWindows      kwsys_ns(System_Shell_GetArgumentForWindows)
# define kwsysSystem_Shell_GetArgumentForUnix         kwsys_ns(System_Shell_GetArgumentForUnix)
# define kwsysSystem_Shell_GetArgumentSizeForWindows  kwsys_ns(System_Shell_GetArgumentSizeForWindows)
# define kwsysSystem_Shell_GetArgumentSizeForUnix     kwsys_ns(System_Shell_GetArgumentSizeForUnix)
# define kwsysSystem_Shell_Flag_e                     kwsys_ns(System_Shell_Flag_e)
# define kwsysSystem_Shell_Flag_Make                  kwsys_ns(System_Shell_Flag_Make)
# define kwsysSystem_Shell_Flag_VSIDE                 kwsys_ns(System_Shell_Flag_VSIDE)
# define kwsysSystem_Shell_Flag_EchoWindows           kwsys_ns(System_Shell_Flag_EchoWindows)
# define kwsysSystem_Shell_Flag_WatcomWMake           kwsys_ns(System_Shell_Flag_WatcomWMake)
# define kwsysSystem_Shell_Flag_MinGWMake             kwsys_ns(System_Shell_Flag_MinGWMake)
# define kwsysSystem_Shell_Flag_NMake                 kwsys_ns(System_Shell_Flag_NMake)
# define kwsysSystem_Shell_Flag_AllowMakeVariables    kwsys_ns(System_Shell_Flag_AllowMakeVariables)
# define kwsysSystem_Shell_Flag_WatcomQuote           kwsys_ns(System_Shell_Flag_WatcomQuote)
#endif

#ifdef __VMS
#define itksysSystem_Shell_GetArgumentForUnix \
   itksysSystem_Shell_UnixGA
#define itksysSystem_Shell_GetArgumentSizeForUnix \
   itksysSystem_Shell_UnixGAS
#define itksysSystem_Shell_GetArgumentForWindows \
   itksysSystem_Shell_WindowsGA
#endif

#if defined(__cplusplus)
extern "C"
{
#endif

/**
 * Transform the given command line argument for use in a Windows or
 * Unix shell.  Returns a pointer to the end of the command line
 * argument in the provided output buffer.  Flags may be passed to
 * modify the generated quoting and escape sequences to work under
 * alternative environments.
 */
kwsysEXPORT char* kwsysSystem_Shell_GetArgumentForWindows(const char* in,
                                                          char* out,
                                                          int flags);
kwsysEXPORT char* kwsysSystem_Shell_GetArgumentForUnix(const char* in,
                                                       char* out,
                                                       int flags);

/**
 * Compute the size of the buffer required to store the output from
 * kwsysSystem_Shell_GetArgumentForWindows or
 * kwsysSystem_Shell_GetArgumentForUnix.  The flags passed must be
 * identical between the two calls.
 */
kwsysEXPORT int kwsysSystem_Shell_GetArgumentSizeForWindows(const char* in,
                                                            int flags);
kwsysEXPORT int kwsysSystem_Shell_GetArgumentSizeForUnix(const char* in,
                                                         int flags);

/**
 * Flags to pass to kwsysSystem_Shell_GetArgumentForWindows or
 * kwsysSystem_Shell_GetArgumentForUnix.  These modify the generated
 * quoting and escape sequences to work under alternative
 * environments.
 */
enum kwsysSystem_Shell_Flag_e
{
  /** The target shell is in a makefile.  */
  kwsysSystem_Shell_Flag_Make               = (1<<0),

  /** The target shell is in a VS project file.  Do not use with
      Shell_Flag_Make.  */
  kwsysSystem_Shell_Flag_VSIDE              = (1<<1),

  /** In a windows shell the argument is being passed to "echo".  */
  kwsysSystem_Shell_Flag_EchoWindows        = (1<<2),

  /** The target shell is in a Watcom WMake makefile.  */
  kwsysSystem_Shell_Flag_WatcomWMake        = (1<<3),

  /** The target shell is in a MinGW Make makefile.  */
  kwsysSystem_Shell_Flag_MinGWMake          = (1<<4),

  /** The target shell is in a NMake makefile.  */
  kwsysSystem_Shell_Flag_NMake              = (1<<5),

  /** Make variable reference syntax $(MAKEVAR) should not be escaped
      to allow a build tool to replace it.  Replacement values
      containing spaces, quotes, backslashes, or other
      non-alphanumeric characters that have significance to some makes
      or shells produce undefined behavior.  */
  kwsysSystem_Shell_Flag_AllowMakeVariables = (1<<6),

  /** The target shell quoting uses extra single Quotes for Watcom tools.  */
  kwsysSystem_Shell_Flag_WatcomQuote        = (1<<7)
};

/**
 * Parse a unix-style command line string into separate arguments.
 *
 * On success, returns a pointer to an array of pointers to individual
 * argument strings.  Each string is null-terminated and the last
 * entry in the array is a NULL pointer (just like argv).  It is the
 * caller's responsibility to free() the strings and the array of
 * pointers to them.
 *
 * On failure, returns NULL.  Failure occurs only on invalid flags or
 * when memory cannot be allocated; never due to content of the input
 * string.  Missing close-quotes are treated as if the necessary
 * closing quote appears.
 *
 * By default single- and double-quoted arguments are supported, and
 * any character may be escaped by a backslash.  The flags argument is
 * reserved for future use, and must be zero (or the call will fail).
 */
kwsysEXPORT char** kwsysSystem_Parse_CommandForUnix(const char* command,
                                                    int flags);

#if defined(__cplusplus)
} /* extern "C" */
#endif

/* If we are building a kwsys .c or .cxx file, let it use these macros.
   Otherwise, undefine them to keep the namespace clean.  */
#if !defined(KWSYS_NAMESPACE)
# undef kwsys_ns
# undef kwsysEXPORT
# if !defined(KWSYS_NAMESPACE) && !itksys_NAME_IS_KWSYS
#  undef kwsysSystem_Parse_CommandForUnix
#  undef kwsysSystem_Shell_GetArgumentForWindows
#  undef kwsysSystem_Shell_GetArgumentForUnix
#  undef kwsysSystem_Shell_GetArgumentSizeForWindows
#  undef kwsysSystem_Shell_GetArgumentSizeForUnix
#  undef kwsysSystem_Shell_Flag_e
#  undef kwsysSystem_Shell_Flag_Make
#  undef kwsysSystem_Shell_Flag_VSIDE
#  undef kwsysSystem_Shell_Flag_EchoWindows
#  undef kwsysSystem_Shell_Flag_WatcomWMake
#  undef kwsysSystem_Shell_Flag_MinGWMake
#  undef kwsysSystem_Shell_Flag_NMake
#  undef kwsysSystem_Shell_Flag_AllowMakeVariables
#  undef kwsysSystem_Shell_Flag_WatcomQuote
# endif
#endif

#endif
