1
2 /**
3 * \file alias.c
4 *
5 * Handle options that are aliases for another option.
6 *
7 * @addtogroup autoopts
8 * @{
9 */
10 /*
11 * This routine will forward an option alias to the correct option code.
12 *
13 * This file is part of AutoOpts, a companion to AutoGen.
14 * AutoOpts is free software.
15 * AutoOpts is Copyright (C) 1992-2018 by Bruce Korb - all rights reserved
16 *
17 * AutoOpts is available under any one of two licenses. The license
18 * in use must be one of these two and the choice is under the control
19 * of the user of the license.
20 *
21 * The GNU Lesser General Public License, version 3 or later
22 * See the files "COPYING.lgplv3" and "COPYING.gplv3"
23 *
24 * The Modified Berkeley Software Distribution License
25 * See the file "COPYING.mbsd"
26 *
27 * These files have the following sha256 sums:
28 *
29 * 8584710e9b04216a394078dc156b781d0b47e1729104d666658aecef8ee32e95 COPYING.gplv3
30 * 4379e7444a0e2ce2b12dd6f5a52a27a4d02d39d247901d3285c88cf0d37f477b COPYING.lgplv3
31 * 13aa749a5b0a454917a944ed8fffc530b784f5ead522b1aacaf4ec8aa55a6239 COPYING.mbsd
32 */
33
34 static tSuccess
too_many_occurrences(tOptions * opts,tOptDesc * od)35 too_many_occurrences(tOptions * opts, tOptDesc * od)
36 {
37 if ((opts->fOptSet & OPTPROC_ERRSTOP) != 0) {
38 char const * eqv = (od->optEquivIndex != NO_EQUIVALENT) ? zequiv : zNil;
39
40 fprintf(stderr, ztoo_often_fmt, opts->pzProgName);
41
42 if (od->optMaxCt > 1)
43 fprintf(stderr, zat_most, od->optMaxCt, od->pz_Name, eqv);
44 else
45 fprintf(stderr, zonly_one, od->pz_Name, eqv);
46 (*opts->pUsageProc)(opts, EXIT_FAILURE);
47 /* NOTREACHED */
48 }
49
50 return FAILURE;
51 }
52
53 /*=export_func optionAlias
54 * private:
55 *
56 * what: relay an option to its alias
57 * arg: + tOptions * + opts + program options descriptor +
58 * arg: + tOptDesc * + old_od + the descriptor for this arg +
59 * arg: + unsigned int + alias + the aliased-to option index +
60 * ret-type: int
61 *
62 * doc:
63 * Handle one option as if it had been specified as another. Exactly.
64 * Returns "-1" if the aliased-to option has appeared too many times.
65 =*/
66 int
optionAlias(tOptions * opts,tOptDesc * old_od,unsigned int alias)67 optionAlias(tOptions * opts, tOptDesc * old_od, unsigned int alias)
68 {
69 tOptDesc * new_od;
70
71 if (opts <= OPTPROC_EMIT_LIMIT)
72 return 0;
73
74 new_od = opts->pOptDesc + alias;
75 if ((unsigned)opts->optCt <= alias) {
76 fputs(zbad_alias_id, stderr);
77 option_exits(EXIT_FAILURE);
78 }
79
80 /*
81 * Copy over the option instance flags
82 */
83 new_od->fOptState &= OPTST_PERSISTENT_MASK;
84 new_od->fOptState |= (old_od->fOptState & ~OPTST_PERSISTENT_MASK);
85 new_od->optArg.argString = old_od->optArg.argString;
86
87 /*
88 * Keep track of count only for DEFINED (command line) options.
89 * IF we have too many, build up an error message and bail.
90 */
91 if ( (new_od->fOptState & OPTST_DEFINED)
92 && (++new_od->optOccCt > new_od->optMaxCt) )
93 return too_many_occurrences(opts, new_od);
94
95 /*
96 * Clear the state bits and counters
97 */
98 old_od->fOptState &= OPTST_PERSISTENT_MASK;
99 old_od->optOccCt = 0;
100
101 /*
102 * If there is a procedure to call, call it
103 */
104 if (new_od->pOptProc != NULL)
105 (*new_od->pOptProc)(opts, new_od);
106 return 0;
107 }
108
109 /** @}
110 *
111 * Local Variables:
112 * mode: C
113 * c-file-style: "stroustrup"
114 * indent-tabs-mode: nil
115 * End:
116 * end of autoopts/alias.c */
117