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36102e3c32
re: Issue https://github.com/Unidata/netcdf-c/issues/2190 The primary purpose of this PR is to improve the utf8 support for windows. This is persuant to a change in Windows that supports utf8 natively (almost). The almost means that it is still utf16 internally and the set of characters representable by utf8 is larger than those representable by utf16. This leaves open the question in the Issue about handling the Windows 1252 character set. This required the following changes: 1. Test the Windows build and major version in order to see if native utf8 is supported. 2. If native utf8 is supported, Modify dpathmgr.c to call the 8-bit version of the windows fopen() and open() functions. 3. In support of this, programs that use XGetOpt (Windows versions) need to get the command line as utf8 and then parse to arc+argv as utf8. This requires using a homegrown command line parser named XCommandLineToArgvA. 4. Add a utility program called "acpget" that prints out the current Windows code page and locale. Additionally, some technical debt was cleaned up as follows: 1. Unify all the places which attempt to read all or a part of a file into the dutil.c#NC_readfile code. 2. Similary unify all the code that creates temp files into dutil.c#NC_mktmp code. 3. Convert almost all remaining calls to fopen() and open() to NCfopen() and NCopen3(). This is to ensure that path management is used consistently. This touches a number of files. 4. extern->EXTERNL as needed to get it to work under Windows.
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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