-
Notifications
You must be signed in to change notification settings - Fork 1
/
SimpleOpt.h
1060 lines (893 loc) · 35.5 KB
/
SimpleOpt.h
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*! @file SimpleOpt.h
@version 3.5
@brief A cross-platform command line library which can parse almost any
of the standard command line formats in use today. It is designed
explicitly to be portable to any platform and has been tested on Windows
and Linux. See CSimpleOptTempl for the class definition.
@section features FEATURES
- MIT Licence allows free use in all software (including GPL
and commercial)
- multi-platform (Windows 95/98/ME/NT/2K/XP, Linux, Unix)
- supports all lengths of option names:
<table width="60%">
<tr><td width="30%"> -
<td>switch character only (e.g. use stdin for input)
<tr><td> -o
<td>short (single character)
<tr><td> -long
<td>long (multiple character, single switch character)
<tr><td> --longer
<td>long (multiple character, multiple switch characters)
</table>
- supports all types of arguments for options:
<table width="60%">
<tr><td width="30%"> --option
<td>short/long option flag (no argument)
<tr><td> --option ARG
<td>short/long option with separate required argument
<tr><td> --option=ARG
<td>short/long option with combined required argument
<tr><td> --option[=ARG]
<td>short/long option with combined optional argument
<tr><td> -oARG
<td>short option with combined required argument
<tr><td> -o[ARG]
<td>short option with combined optional argument
</table>
- supports options with multiple or variable numbers of arguments:
<table width="60%">
<tr><td width="30%"> --multi ARG1 ARG2
<td>Multiple arguments
<tr><td> --multi N ARG-1 ARG-2 ... ARG-N
<td>Variable number of arguments
</table>
- supports case-insensitive option matching on short, long and/or
word arguments.
- supports options which do not use a switch character. i.e. a special
word which is construed as an option.
e.g. "foo.exe open /directory/file.txt"
- supports clumping of multiple short options (no arguments) in a string
e.g. "foo.exe -abcdef file1" <==> "foo.exe -a -b -c -d -e -f file1"
- automatic recognition of a single slash as equivalent to a single
hyphen on Windows, e.g. "/f FILE" is equivalent to "-f FILE".
- file arguments can appear anywhere in the argument list:
"foo.exe file1.txt -a ARG file2.txt --flag file3.txt file4.txt"
files will be returned to the application in the same order they were
supplied on the command line
- short-circuit option matching: "--man" will match "--mandate"
invalid options can be handled while continuing to parse the command
line valid options list can be changed dynamically during command line
processing, i.e. accept different options depending on an option
supplied earlier in the command line.
- implemented with only a single C++ header file
- optionally use no C runtime or OS functions
- char, wchar_t and Windows TCHAR in the same program
- complete working examples included
- compiles cleanly at warning level 4 (Windows/VC.NET 2003), warning
level 3 (Windows/VC6) and -Wall (Linux/gcc)
@section usage USAGE
The SimpleOpt class is used by following these steps:
<ol>
<li> Include the SimpleOpt.h header file
<pre>
\#include "SimpleOpt.h"
</pre>
<li> Define an array of valid options for your program.
<pre>
@link CSimpleOptTempl::SOption CSimpleOpt::SOption @endlink g_rgOptions[] = {
{ OPT_FLAG, _T("-a"), SO_NONE }, // "-a"
{ OPT_FLAG, _T("-b"), SO_NONE }, // "-b"
{ OPT_ARG, _T("-f"), SO_REQ_SEP }, // "-f ARG"
{ OPT_HELP, _T("-?"), SO_NONE }, // "-?"
{ OPT_HELP, _T("--help"), SO_NONE }, // "--help"
SO_END_OF_OPTIONS // END
};
</pre>
Note that all options must start with a hyphen even if the slash will
be accepted. This is because the slash character is automatically
converted into a hyphen to test against the list of options.
For example, the following line matches both "-?" and "/?"
(on Windows).
<pre>
{ OPT_HELP, _T("-?"), SO_NONE }, // "-?"
</pre>
<li> Instantiate a CSimpleOpt object supplying argc, argv and the option
table
<pre>
@link CSimpleOptTempl CSimpleOpt @endlink args(argc, argv, g_rgOptions);
</pre>
<li> Process the arguments by calling Next() until it returns false.
On each call, first check for an error by calling LastError(), then
either handle the error or process the argument.
<pre>
while (args.Next()) {
if (args.LastError() == SO_SUCCESS) {
handle option: use OptionId(), OptionText() and OptionArg()
}
else {
handle error: see ESOError enums
}
}
</pre>
<li> Process all non-option arguments with File(), Files() and FileCount()
<pre>
ShowFiles(args.FileCount(), args.Files());
</pre>
</ol>
@section notes NOTES
- In MBCS mode, this library is guaranteed to work correctly only when
all option names use only ASCII characters.
- Note that if case-insensitive matching is being used then the first
matching option in the argument list will be returned.
@section licence MIT LICENCE
The licence text below is the boilerplate "MIT Licence" used from:
http://www.opensource.org/licenses/mit-license.php
Copyright (c) 2006-2007, Brodie Thiesfield
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to 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.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*! @mainpage
<table>
<tr><th>Library <td>SimpleOpt
<tr><th>Author <td>Brodie Thiesfield [code at jellycan dot com]
<tr><th>Source <td>http://code.jellycan.com/simpleopt/
</table>
@section SimpleOpt SimpleOpt
A cross-platform library providing a simple method to parse almost any of
the standard command-line formats in use today.
See the @link SimpleOpt.h SimpleOpt @endlink documentation for full
details.
@section SimpleGlob SimpleGlob
A cross-platform file globbing library providing the ability to
expand wildcards in command-line arguments to a list of all matching
files.
See the @link SimpleGlob.h SimpleGlob @endlink documentation for full
details.
*/
#ifndef INCLUDED_SimpleOpt
#define INCLUDED_SimpleOpt
// Default the max arguments to a fixed value. If you want to be able to
// handle any number of arguments, then predefine this to 0 and it will
// use an internal dynamically allocated buffer instead.
#ifdef SO_MAX_ARGS
# define SO_STATICBUF SO_MAX_ARGS
#else
# include <stdlib.h> // malloc, free
# include <string.h> // memcpy
# define SO_STATICBUF 100
#endif
//! Error values
typedef enum _ESOError
{
//! No error
SO_SUCCESS = 0,
/*! It looks like an option (it starts with a switch character), but
it isn't registered in the option table. */
SO_OPT_INVALID = -1,
/*! Multiple options matched the supplied option text.
Only returned when NOT using SO_O_EXACT. */
SO_OPT_MULTIPLE = -2,
/*! Option doesn't take an argument, but a combined argument was
supplied. */
SO_ARG_INVALID = -3,
/*! SO_REQ_CMB style-argument was supplied to a SO_REQ_SEP option
Only returned when using SO_O_PEDANTIC. */
SO_ARG_INVALID_TYPE = -4,
//! Required argument was not supplied
SO_ARG_MISSING = -5,
/*! Option argument looks like another option.
Only returned when NOT using SO_O_NOERR. */
SO_ARG_INVALID_DATA = -6
} ESOError;
//! Option flags
enum _ESOFlags
{
/*! Disallow partial matching of option names */
SO_O_EXACT = 0x0001,
/*! Disallow use of slash as an option marker on Windows.
Un*x only ever recognizes a hyphen. */
SO_O_NOSLASH = 0x0002,
/*! Permit arguments on single letter options with no equals sign.
e.g. -oARG or -o[ARG] */
SO_O_SHORTARG = 0x0004,
/*! Permit single character options to be clumped into a single
option string. e.g. "-a -b -c" <==> "-abc" */
SO_O_CLUMP = 0x0008,
/*! Process the entire argv array for options, including the
argv[0] entry. */
SO_O_USEALL = 0x0010,
/*! Do not generate an error for invalid options. errors for missing
arguments will still be generated. invalid options will be
treated as files. invalid options in clumps will be silently
ignored. */
SO_O_NOERR = 0x0020,
/*! Validate argument type pedantically. Return an error when a
separated argument "-opt arg" is supplied by the user as a
combined argument "-opt=arg". By default this is not considered
an error. */
SO_O_PEDANTIC = 0x0040,
/*! Case-insensitive comparisons for short arguments */
SO_O_ICASE_SHORT = 0x0100,
/*! Case-insensitive comparisons for long arguments */
SO_O_ICASE_LONG = 0x0200,
/*! Case-insensitive comparisons for word arguments
i.e. arguments without any hyphens at the start. */
SO_O_ICASE_WORD = 0x0400,
/*! Case-insensitive comparisons for all arg types */
SO_O_ICASE = 0x0700
};
/*! Types of arguments that options may have. Note that some of the _ESOFlags
are not compatible with all argument types. SO_O_SHORTARG requires that
relevant options use either SO_REQ_CMB or SO_OPT. SO_O_CLUMP requires
that relevant options use only SO_NONE.
*/
typedef enum _ESOArgType {
/*! No argument. Just the option flags.
e.g. -o --opt */
SO_NONE,
/*! Required separate argument.
e.g. -o ARG --opt ARG */
SO_REQ_SEP,
/*! Required combined argument.
e.g. -oARG -o=ARG --opt=ARG */
SO_REQ_CMB,
/*! Optional combined argument.
e.g. -o[ARG] -o[=ARG] --opt[=ARG] */
SO_OPT,
/*! Multiple separate arguments. The actual number of arguments is
determined programatically at the time the argument is processed.
e.g. -o N ARG1 ARG2 ... ARGN --opt N ARG1 ARG2 ... ARGN */
SO_MULTI
} ESOArgType;
//! this option definition must be the last entry in the table
#define SO_END_OF_OPTIONS { -1, NULL, SO_NONE }
#ifdef _DEBUG
# ifdef _MSC_VER
# include <crtdbg.h>
# define SO_ASSERT(b) _ASSERTE(b)
# else
# include <assert.h>
# define SO_ASSERT(b) assert(b)
# endif
#else
# define SO_ASSERT(b) //!< assertion used to test input data
#endif
// ---------------------------------------------------------------------------
// MAIN TEMPLATE CLASS
// ---------------------------------------------------------------------------
/*! @brief Implementation of the SimpleOpt class */
template<class SOCHAR>
class CSimpleOptTempl
{
public:
/*! @brief Structure used to define all known options. */
struct SOption {
/*! ID to return for this flag. Optional but must be >= 0 */
int nId;
/*! arg string to search for, e.g. "open", "-", "-f", "--file"
Note that on Windows the slash option marker will be converted
to a hyphen so that "-f" will also match "/f". */
const SOCHAR * pszArg;
/*! type of argument accepted by this option */
ESOArgType nArgType;
};
/*! @brief Initialize the class. Init() must be called later. */
CSimpleOptTempl()
: m_rgShuffleBuf(NULL)
{
Init(0, NULL, NULL, 0);
}
/*! @brief Initialize the class in preparation for use. */
CSimpleOptTempl(
int argc,
SOCHAR * argv[],
const SOption * a_rgOptions,
int a_nFlags = 0
)
: m_rgShuffleBuf(NULL)
{
Init(argc, argv, a_rgOptions, a_nFlags);
}
#ifndef SO_MAX_ARGS
/*! @brief Deallocate any allocated memory. */
~CSimpleOptTempl() { if (m_rgShuffleBuf) free(m_rgShuffleBuf); }
#endif
/*! @brief Initialize the class in preparation for calling Next.
The table of options pointed to by a_rgOptions does not need to be
valid at the time that Init() is called. However on every call to
Next() the table pointed to must be a valid options table with the
last valid entry set to SO_END_OF_OPTIONS.
NOTE: the array pointed to by a_argv will be modified by this
class and must not be used or modified outside of member calls to
this class.
@param a_argc Argument array size
@param a_argv Argument array
@param a_rgOptions Valid option array
@param a_nFlags Optional flags to modify the processing of
the arguments
@return true Successful
@return false if SO_MAX_ARGC > 0: Too many arguments
if SO_MAX_ARGC == 0: Memory allocation failure
*/
bool Init(
int a_argc,
SOCHAR * a_argv[],
const SOption * a_rgOptions,
int a_nFlags = 0
);
/*! @brief Change the current options table during option parsing.
@param a_rgOptions Valid option array
*/
inline void SetOptions(const SOption * a_rgOptions) {
m_rgOptions = a_rgOptions;
}
/*! @brief Change the current flags during option parsing.
Note that changing the SO_O_USEALL flag here will have no affect.
It must be set using Init() or the constructor.
@param a_nFlags Flags to modify the processing of the arguments
*/
inline void SetFlags(int a_nFlags) { m_nFlags = a_nFlags; }
/*! @brief Query if a particular flag is set */
inline bool HasFlag(int a_nFlag) const {
return (m_nFlags & a_nFlag) == a_nFlag;
}
/*! @brief Advance to the next option if available.
When all options have been processed it will return false. When true
has been returned, you must check for an invalid or unrecognized
option using the LastError() method. This will be return an error
value other than SO_SUCCESS on an error. All standard data
(e.g. OptionText(), OptionArg(), OptionId(), etc) will be available
depending on the error.
After all options have been processed, the remaining files from the
command line can be processed in same order as they were passed to
the program.
@return true option or error available for processing
@return false all options have been processed
*/
bool Next();
/*! Stops processing of the command line and returns all remaining
arguments as files. The next call to Next() will return false.
*/
void Stop();
/*! @brief Return the last error that occurred.
This function must always be called before processing the current
option. This function is available only when Next() has returned true.
*/
inline ESOError LastError() const { return m_nLastError; }
/*! @brief Return the nId value from the options array for the current
option.
This function is available only when Next() has returned true.
*/
inline int OptionId() const { return m_nOptionId; }
/*! @brief Return the pszArg from the options array for the current
option.
This function is available only when Next() has returned true.
*/
inline const SOCHAR * OptionText() const { return m_pszOptionText; }
/*! @brief Return the argument for the current option where one exists.
If there is no argument for the option, this will return NULL.
This function is available only when Next() has returned true.
*/
inline SOCHAR * OptionArg() const { return m_pszOptionArg; }
/*! @brief Validate and return the desired number of arguments.
This is only valid when OptionId() has return the ID of an option
that is registered as SO_MULTI. It may be called multiple times
each time returning the desired number of arguments. Previously
returned argument pointers are remain valid.
If an error occurs during processing, NULL will be returned and
the error will be available via LastError().
@param n Number of arguments to return.
*/
SOCHAR ** MultiArg(int n);
/*! @brief Returned the number of entries in the Files() array.
After Next() has returned false, this will be the list of files (or
otherwise unprocessed arguments).
*/
inline int FileCount() const { return m_argc - m_nLastArg; }
/*! @brief Return the specified file argument.
@param n Index of the file to return. This must be between 0
and FileCount() - 1;
*/
inline SOCHAR * File(int n) const {
SO_ASSERT(n >= 0 && n < FileCount());
return m_argv[m_nLastArg + n];
}
/*! @brief Return the array of files. */
inline SOCHAR ** Files() const { return &m_argv[m_nLastArg]; }
private:
CSimpleOptTempl(const CSimpleOptTempl &); // disabled
CSimpleOptTempl & operator=(const CSimpleOptTempl &); // disabled
SOCHAR PrepareArg(SOCHAR * a_pszString) const;
bool NextClumped();
void ShuffleArg(int a_nStartIdx, int a_nCount);
int LookupOption(const SOCHAR * a_pszOption) const;
int CalcMatch(const SOCHAR *a_pszSource, const SOCHAR *a_pszTest) const;
// Find the '=' character within a string.
inline SOCHAR * FindEquals(SOCHAR *s) const {
while (*s && *s != (SOCHAR)'=') ++s;
return *s ? s : NULL;
}
bool IsEqual(SOCHAR a_cLeft, SOCHAR a_cRight, int a_nArgType) const;
inline void Copy(SOCHAR ** ppDst, SOCHAR ** ppSrc, int nCount) const {
#ifdef SO_MAX_ARGS
// keep our promise of no CLIB usage
while (nCount-- > 0) *ppDst++ = *ppSrc++;
#else
memcpy(ppDst, ppSrc, nCount * sizeof(SOCHAR*));
#endif
}
private:
const SOption * m_rgOptions; //!< pointer to options table
int m_nFlags; //!< flags
int m_nOptionIdx; //!< current argv option index
int m_nOptionId; //!< id of current option (-1 = invalid)
int m_nNextOption; //!< index of next option
int m_nLastArg; //!< last argument, after this are files
int m_argc; //!< argc to process
SOCHAR ** m_argv; //!< argv
const SOCHAR * m_pszOptionText; //!< curr option text, e.g. "-f"
SOCHAR * m_pszOptionArg; //!< curr option arg, e.g. "c:\file.txt"
SOCHAR * m_pszClump; //!< clumped single character options
SOCHAR m_szShort[3]; //!< temp for clump and combined args
ESOError m_nLastError; //!< error status from the last call
SOCHAR ** m_rgShuffleBuf; //!< shuffle buffer for large argc
};
// ---------------------------------------------------------------------------
// IMPLEMENTATION
// ---------------------------------------------------------------------------
template<class SOCHAR>
bool
CSimpleOptTempl<SOCHAR>::Init(
int a_argc,
SOCHAR * a_argv[],
const SOption * a_rgOptions,
int a_nFlags
)
{
m_argc = a_argc;
m_nLastArg = a_argc;
m_argv = a_argv;
m_rgOptions = a_rgOptions;
m_nLastError = SO_SUCCESS;
m_nOptionIdx = 0;
m_nOptionId = -1;
m_pszOptionText = NULL;
m_pszOptionArg = NULL;
m_nNextOption = (a_nFlags & SO_O_USEALL) ? 0 : 1;
m_szShort[0] = (SOCHAR)'-';
m_szShort[2] = (SOCHAR)'\0';
m_nFlags = a_nFlags;
m_pszClump = NULL;
#ifdef SO_MAX_ARGS
if (m_argc > SO_MAX_ARGS) {
m_nLastError = SO_ARG_INVALID_DATA;
m_nLastArg = 0;
return false;
}
#else
if (m_rgShuffleBuf) {
free(m_rgShuffleBuf);
}
if (m_argc > SO_STATICBUF) {
m_rgShuffleBuf = (SOCHAR**) malloc(sizeof(SOCHAR*) * m_argc);
if (!m_rgShuffleBuf) {
return false;
}
}
#endif
return true;
}
template<class SOCHAR>
bool
CSimpleOptTempl<SOCHAR>::Next()
{
#ifdef SO_MAX_ARGS
if (m_argc > SO_MAX_ARGS) {
SO_ASSERT(!"Too many args! Check the return value of Init()!");
return false;
}
#endif
// process a clumped option string if appropriate
if (m_pszClump && *m_pszClump) {
// silently discard invalid clumped option
bool bIsValid = NextClumped();
while (*m_pszClump && !bIsValid && HasFlag(SO_O_NOERR)) {
bIsValid = NextClumped();
}
// return this option if valid or we are returning errors
if (bIsValid || !HasFlag(SO_O_NOERR)) {
return true;
}
}
SO_ASSERT(!m_pszClump || !*m_pszClump);
m_pszClump = NULL;
// init for the next option
m_nOptionIdx = m_nNextOption;
m_nOptionId = -1;
m_pszOptionText = NULL;
m_pszOptionArg = NULL;
m_nLastError = SO_SUCCESS;
// find the next option
SOCHAR cFirst;
int nTableIdx = -1;
int nOptIdx = m_nOptionIdx;
while (nTableIdx < 0 && nOptIdx < m_nLastArg) {
SOCHAR * pszArg = m_argv[nOptIdx];
m_pszOptionArg = NULL;
// find this option in the options table
cFirst = PrepareArg(pszArg);
if (pszArg[0] == (SOCHAR)'-') {
// find any combined argument string and remove equals sign
m_pszOptionArg = FindEquals(pszArg);
if (m_pszOptionArg) {
*m_pszOptionArg++ = (SOCHAR)'\0';
}
}
nTableIdx = LookupOption(pszArg);
// if we didn't find this option but if it is a short form
// option then we try the alternative forms
if (nTableIdx < 0
&& !m_pszOptionArg
&& pszArg[0] == (SOCHAR)'-'
&& pszArg[1]
&& pszArg[1] != (SOCHAR)'-'
&& pszArg[2])
{
// test for a short-form with argument if appropriate
if (HasFlag(SO_O_SHORTARG)) {
m_szShort[1] = pszArg[1];
int nIdx = LookupOption(m_szShort);
if (nIdx >= 0
&& (m_rgOptions[nIdx].nArgType == SO_REQ_CMB
|| m_rgOptions[nIdx].nArgType == SO_OPT))
{
m_pszOptionArg = &pszArg[2];
pszArg = m_szShort;
nTableIdx = nIdx;
}
}
// test for a clumped short-form option string and we didn't
// match on the short-form argument above
if (nTableIdx < 0 && HasFlag(SO_O_CLUMP)) {
m_pszClump = &pszArg[1];
++m_nNextOption;
if (nOptIdx > m_nOptionIdx) {
ShuffleArg(m_nOptionIdx, nOptIdx - m_nOptionIdx);
}
return Next();
}
}
// The option wasn't found. If it starts with a switch character
// and we are not suppressing errors for invalid options then it
// is reported as an error, otherwise it is data.
if (nTableIdx < 0) {
if (!HasFlag(SO_O_NOERR) && pszArg[0] == (SOCHAR)'-') {
m_pszOptionText = pszArg;
break;
}
pszArg[0] = cFirst;
++nOptIdx;
if (m_pszOptionArg) {
*(--m_pszOptionArg) = (SOCHAR)'=';
}
}
}
// end of options
if (nOptIdx >= m_nLastArg) {
if (nOptIdx > m_nOptionIdx) {
ShuffleArg(m_nOptionIdx, nOptIdx - m_nOptionIdx);
}
return false;
}
++m_nNextOption;
// get the option id
ESOArgType nArgType = SO_NONE;
if (nTableIdx < 0) {
m_nLastError = (ESOError) nTableIdx; // error code
}
else {
m_nOptionId = m_rgOptions[nTableIdx].nId;
m_pszOptionText = m_rgOptions[nTableIdx].pszArg;
// ensure that the arg type is valid
nArgType = m_rgOptions[nTableIdx].nArgType;
switch (nArgType) {
case SO_NONE:
if (m_pszOptionArg) {
m_nLastError = SO_ARG_INVALID;
}
break;
case SO_REQ_SEP:
if (m_pszOptionArg) {
// they wanted separate args, but we got a combined one,
// unless we are pedantic, just accept it.
if (HasFlag(SO_O_PEDANTIC)) {
m_nLastError = SO_ARG_INVALID_TYPE;
}
}
// more processing after we shuffle
break;
case SO_REQ_CMB:
if (!m_pszOptionArg) {
m_nLastError = SO_ARG_MISSING;
}
break;
case SO_OPT:
// nothing to do
break;
case SO_MULTI:
// nothing to do. Caller must now check for valid arguments
// using GetMultiArg()
break;
}
}
// shuffle the files out of the way
if (nOptIdx > m_nOptionIdx) {
ShuffleArg(m_nOptionIdx, nOptIdx - m_nOptionIdx);
}
// we need to return the separate arg if required, just re-use the
// multi-arg code because it all does the same thing
if ( nArgType == SO_REQ_SEP
&& !m_pszOptionArg
&& m_nLastError == SO_SUCCESS)
{
SOCHAR ** ppArgs = MultiArg(1);
if (ppArgs) {
m_pszOptionArg = *ppArgs;
}
}
return true;
}
template<class SOCHAR>
void
CSimpleOptTempl<SOCHAR>::Stop()
{
if (m_nNextOption < m_nLastArg) {
ShuffleArg(m_nNextOption, m_nLastArg - m_nNextOption);
}
}
template<class SOCHAR>
SOCHAR
CSimpleOptTempl<SOCHAR>::PrepareArg(
SOCHAR * a_pszString
) const
{
#ifdef _WIN32
// On Windows we can accept the forward slash as a single character
// option delimiter, but it cannot replace the '-' option used to
// denote stdin. On Un*x paths may start with slash so it may not
// be used to start an option.
if (!HasFlag(SO_O_NOSLASH)
&& a_pszString[0] == (SOCHAR)'/'
&& a_pszString[1]
&& a_pszString[1] != (SOCHAR)'-')
{
a_pszString[0] = (SOCHAR)'-';
return (SOCHAR)'/';
}
#endif
return a_pszString[0];
}
template<class SOCHAR>
bool
CSimpleOptTempl<SOCHAR>::NextClumped()
{
// prepare for the next clumped option
m_szShort[1] = *m_pszClump++;
m_nOptionId = -1;
m_pszOptionText = NULL;
m_pszOptionArg = NULL;
m_nLastError = SO_SUCCESS;
// lookup this option, ensure that we are using exact matching
int nSavedFlags = m_nFlags;
m_nFlags = SO_O_EXACT;
int nTableIdx = LookupOption(m_szShort);
m_nFlags = nSavedFlags;
// unknown option
if (nTableIdx < 0) {
m_nLastError = (ESOError) nTableIdx; // error code
return false;
}
// valid option
m_pszOptionText = m_rgOptions[nTableIdx].pszArg;
ESOArgType nArgType = m_rgOptions[nTableIdx].nArgType;
if (nArgType == SO_NONE) {
m_nOptionId = m_rgOptions[nTableIdx].nId;
return true;
}
if (nArgType == SO_REQ_CMB && *m_pszClump) {
m_nOptionId = m_rgOptions[nTableIdx].nId;
m_pszOptionArg = m_pszClump;
while (*m_pszClump) ++m_pszClump; // must point to an empty string
return true;
}
// invalid option as it requires an argument
m_nLastError = SO_ARG_MISSING;
return true;
}
// Shuffle arguments to the end of the argv array.
//
// For example:
// argv[] = { "0", "1", "2", "3", "4", "5", "6", "7", "8" };
//
// ShuffleArg(1, 1) = { "0", "2", "3", "4", "5", "6", "7", "8", "1" };
// ShuffleArg(5, 2) = { "0", "1", "2", "3", "4", "7", "8", "5", "6" };
// ShuffleArg(2, 4) = { "0", "1", "6", "7", "8", "2", "3", "4", "5" };
template<class SOCHAR>
void
CSimpleOptTempl<SOCHAR>::ShuffleArg(
int a_nStartIdx,
int a_nCount
)
{
SOCHAR * staticBuf[SO_STATICBUF];
SOCHAR ** buf = m_rgShuffleBuf ? m_rgShuffleBuf : staticBuf;
int nTail = m_argc - a_nStartIdx - a_nCount;
// make a copy of the elements to be moved
Copy(buf, m_argv + a_nStartIdx, a_nCount);
// move the tail down
Copy(m_argv + a_nStartIdx, m_argv + a_nStartIdx + a_nCount, nTail);
// append the moved elements to the tail
Copy(m_argv + a_nStartIdx + nTail, buf, a_nCount);
// update the index of the last unshuffled arg
m_nLastArg -= a_nCount;
}
// match on the long format strings. partial matches will be
// accepted only if that feature is enabled.
template<class SOCHAR>
int
CSimpleOptTempl<SOCHAR>::LookupOption(
const SOCHAR * a_pszOption
) const
{
int nBestMatch = -1; // index of best match so far
int nBestMatchLen = 0; // matching characters of best match
int nLastMatchLen = 0; // matching characters of last best match
for (int n = 0; m_rgOptions[n].nId >= 0; ++n) {
// the option table must use hyphens as the option character,
// the slash character is converted to a hyphen for testing.
SO_ASSERT(m_rgOptions[n].pszArg[0] != (SOCHAR)'/');
int nMatchLen = CalcMatch(m_rgOptions[n].pszArg, a_pszOption);
if (nMatchLen == -1) {
return n;
}
if (nMatchLen > 0 && nMatchLen >= nBestMatchLen) {
nLastMatchLen = nBestMatchLen;
nBestMatchLen = nMatchLen;
nBestMatch = n;
}
}
// only partial matches or no match gets to here, ensure that we
// don't return a partial match unless it is a clear winner
if (HasFlag(SO_O_EXACT) || nBestMatch == -1) {
return SO_OPT_INVALID;
}
return (nBestMatchLen > nLastMatchLen) ? nBestMatch : SO_OPT_MULTIPLE;
}
// calculate the number of characters that match (case-sensitive)
// 0 = no match, > 0 == number of characters, -1 == perfect match
template<class SOCHAR>
int
CSimpleOptTempl<SOCHAR>::CalcMatch(
const SOCHAR * a_pszSource,
const SOCHAR * a_pszTest
) const
{
if (!a_pszSource || !a_pszTest) {
return 0;
}
// determine the argument type
int nArgType = SO_O_ICASE_LONG;
if (a_pszSource[0] != '-') {
nArgType = SO_O_ICASE_WORD;
}
else if (a_pszSource[1] != '-' && !a_pszSource[2]) {
nArgType = SO_O_ICASE_SHORT;
}
// match and skip leading hyphens
while (*a_pszSource == (SOCHAR)'-' && *a_pszSource == *a_pszTest) {
++a_pszSource;
++a_pszTest;
}
if (*a_pszSource == (SOCHAR)'-' || *a_pszTest == (SOCHAR)'-') {
return 0;
}
// find matching number of characters in the strings
int nLen = 0;
while (*a_pszSource && IsEqual(*a_pszSource, *a_pszTest, nArgType)) {
++a_pszSource;
++a_pszTest;
++nLen;
}
// if we have exhausted the source...
if (!*a_pszSource) {
// and the test strings, then it's a perfect match
if (!*a_pszTest) {
return -1;
}
// otherwise the match failed as the test is longer than
// the source. i.e. "--mant" will not match the option "--man".
return 0;
}
// if we haven't exhausted the test string then it is not a match
// i.e. "--mantle" will not best-fit match to "--mandate" at all.
if (*a_pszTest) {
return 0;
}
// partial match to the current length of the test string
return nLen;
}
template<class SOCHAR>
bool
CSimpleOptTempl<SOCHAR>::IsEqual(
SOCHAR a_cLeft,
SOCHAR a_cRight,
int a_nArgType
) const
{
// if this matches then we are doing case-insensitive matching
if (m_nFlags & a_nArgType) {
if (a_cLeft >= 'A' && a_cLeft <= 'Z') a_cLeft += 'a' - 'A';
if (a_cRight >= 'A' && a_cRight <= 'Z') a_cRight += 'a' - 'A';