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3765d86e46
When "getopt()" is not available, various of the netcdf-c utilities
use XGetopt instead. This occurs primarily when building under Window,
so the build changes are restricted to CMake.
This PR tries to isolate XGetopt.c to the libdispatch directory
and then builds the various utilities using this cliche:
````
IF(USE_X_GETOPT)
SET(XGETOPTSRC "${CMAKE_CURRENT_SOURCE_DIR}/../libdispatch/XGetopt.c")
ENDIF()
````
This avoids the need to copy XGetopt.c to all the directories that
use it.
285 lines
8.1 KiB
C
285 lines
8.1 KiB
C
// XGetopt.cpp Version 1.2
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//
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// Author: Hans Dietrich
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// hdietrich2@hotmail.com
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//
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// Description:
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// XGetopt.cpp implements getopt(), a function to parse command lines.
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//
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// History
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// Version 1.2 - 2003 May 17
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// - Added Unicode support
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//
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// Version 1.1 - 2002 March 10
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// - Added example to XGetopt.cpp module header
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//
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// This software is released into the public domain.
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// You are free to use it in any way you like.
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//
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// This software is provided "as is" with no expressed
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// or implied warranty. I accept no liability for any
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// damage or loss of business that this software may cause.
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//
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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// if you are not using precompiled headers then include these lines:
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///////////////////////////////////////////////////////////////////////////////
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#ifndef DLL_EXPORT
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#define DLL_EXPORT
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#endif
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#include "XGetopt.h"
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#include "nclist.h"
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#include "ncbytes.h"
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#ifdef _MSC_VER
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static void XCommandLineToArgvA(int* argcp, char*** argvp);
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#endif
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///////////////////////////////////////////////////////////////////////////////
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//
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// X G e t o p t . c p p
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//
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//
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// NAME
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// getopt -- parse command line options
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//
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// SYNOPSIS
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// int getopt(int argc, TCHAR *argv[], TCHAR *optstring)
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//
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// extern TCHAR *optarg;
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// extern int optind;
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//
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// DESCRIPTION
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// The getopt() function parses the command line arguments. Its
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// arguments argc and argv are the argument count and array as
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// passed into the application on program invocation. In the case
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// of Visual C++ programs, argc and argv are available via the
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// variables __argc and __argv (double underscores), respectively.
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// getopt returns the next option letter in argv that matches a
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// letter in optstring. (Note: Unicode programs should use
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// __targv instead of __argv. Also, all character and string
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// literals should be enclosed in _T( ) ).
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//
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// optstring is a string of recognized option letters; if a letter
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// is followed by a colon, the option is expected to have an argument
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// that may or may not be separated from it by white space. optarg
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// is set to point to the start of the option argument on return from
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// getopt.
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//
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// Option letters may be combined, e.g., "-ab" is equivalent to
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// "-a -b". Option letters are case sensitive.
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//
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// getopt places in the external variable optind the argv index
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// of the next argument to be processed. optind is initialized
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// to 0 before the first call to getopt.
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//
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// When all options have been processed (i.e., up to the first
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// non-option argument), getopt returns EOF, optarg will point
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// to the argument, and optind will be set to the argv index of
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// the argument. If there are no non-option arguments, optarg
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// will be set to NULL.
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//
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// The special option "--" may be used to delimit the end of the
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// options; EOF will be returned, and "--" (and everything after it)
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// will be skipped.
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//
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// RETURN VALUE
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// For option letters contained in the string optstring, getopt
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// will return the option letter. getopt returns a question mark (?)
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// when it encounters an option letter not included in optstring.
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// EOF is returned when processing is finished.
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//
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// BUGS
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// 1) Long options are not supported.
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// 2) The GNU double-colon extension is not supported.
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// 3) The environment variable POSIXLY_CORRECT is not supported.
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// 4) The + syntax is not supported.
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// 5) The automatic permutation of arguments is not supported.
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// 6) This implementation of getopt() returns EOF if an error is
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// encountered, instead of -1 as the latest standard requires.
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//
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// EXAMPLE
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// BOOL CMyApp::ProcessCommandLine(int argc, TCHAR *argv[])
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// {
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// int c;
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//
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// while ((c = getopt(argc, argv, _T("aBn:"))) != EOF)
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// {
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// switch (c)
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// {
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// case _T('a'):
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// TRACE(_T("option a\n"));
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// //
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// // set some flag here
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// //
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// break;
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//
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// case _T('B'):
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// TRACE( _T("option B\n"));
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// //
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// // set some other flag here
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// //
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// break;
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//
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// case _T('n'):
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// TRACE(_T("option n: value=%d\n"), atoi(optarg));
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// //
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// // do something with value here
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// //
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// break;
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//
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// case _T('?'):
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// TRACE(_T("ERROR: illegal option %s\n"), argv[optind-1]);
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// return FALSE;
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// break;
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//
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// default:
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// TRACE(_T("WARNING: no handler for option %c\n"), c);
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// return FALSE;
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// break;
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// }
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// }
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// //
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// // check for non-option args here
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// //
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// return TRUE;
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// }
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//
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///////////////////////////////////////////////////////////////////////////////
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GTOPT_EXTRA TCHAR *optarg; // global argument pointer
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GTOPT_EXTRA int optind = 0; // global argv index
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GTOPT_EXTRA int opterr; // print error
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GTOPT_EXTRA
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int getopt(int argc, TCHAR *argv[], TCHAR *optstring)
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{
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static TCHAR *next = NULL;
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TCHAR c;
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TCHAR *cp = malloc(sizeof(TCHAR)*1024);
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#ifdef _MSC_VER
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{
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int xargc = -1;
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char** xargv = NULL;
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XCommandLineToArgvA(&xargc, &xargv);
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}
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#endif
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if (optind == 0)
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next = NULL;
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optarg = NULL;
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if (next == NULL || *next == _T('\0'))
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{
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if (optind == 0)
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optind++;
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if (optind >= argc || argv[optind][0] != _T('-') || argv[optind][1] == _T('\0'))
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{
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optarg = NULL;
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if (optind < argc)
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optarg = argv[optind];
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return EOF;
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}
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if (_tcscmp(argv[optind], _T("--")) == 0)
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{
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optind++;
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optarg = NULL;
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if (optind < argc)
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optarg = argv[optind];
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return EOF;
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}
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next = argv[optind];
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next++; // skip past -
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optind++;
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}
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c = *next++;
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cp = strchr(optstring, c);
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if (cp == NULL || c == _T(':'))
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return _T('?');
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cp++;
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if (*cp == _T(':'))
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{
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if (*next != _T('\0'))
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{
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optarg = next;
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next = NULL;
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}
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else if (optind < argc)
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{
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optarg = argv[optind];
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optind++;
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}
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else
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{
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return _T('?');
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}
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}
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return c;
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}
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/**************************************************/
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#define ESCAPE '\\'
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#define SQUOTE '\''
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#define DQUOTE '"'
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/* Convert a UTF8 command line into a series of words for use by XGetOpt */
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/* Note only checks for ASCII '\' '\'' '"' */
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static void
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XCommandLineToArgvA(int* argcp, char*** argvp)
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{
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const char* line = NULL;
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size_t len;
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int whitespace;
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int quote = 0;
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enum State state;
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NClist* argv = NULL;
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NCbytes* word = NULL;
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char** p;
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line = GetCommandLineA();
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len = strlen(line);
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argv = nclistnew();
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word = ncbytesnew();
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whitespace = 1; /* start in whitespace mode */
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for(p=line;*p;p++) {
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int c = *p;
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if(whitespace && c <= ' ' || c == 127) continue; /* more whitespace */
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if(!whitespace && c <= ' ' || c == 127) {
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whitespace = 1; /* end of word */
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ncbytesnull(word);
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nclistpush(argv,ncbytesextract(word)); /* capture the word */
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continue;
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}
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whitespace = 0; /* end whitespace */
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if(c == ESCAPE) {
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c = *(++p); /* move to next char */
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} else if(c == SQUOTE || c == DQUOTE) {
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if(!quote) {quote = c; continue;} /* Start quoted text */
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if(quote == c) {quote = 0; continue;} /* end quoted text */
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}
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/* Just collect the character as part of the current word */
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ncbytesappend(word,c);
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}
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/* Return parsed words */
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if(argcp) *argcp = nclistlength(argv);
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nclistpush(argv,NULL); /* Just to be sure */
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if(argvp) *argvp = (char**)nclistextract(argv);
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nclistfree(argv);
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ncbytesfree(word);
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}
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