reset.c revision 290001 
1
2/**
3 * \file reset.c
4 *
5 *  Reset the option state to the compiled state.
6 *
7 * @addtogroup autoopts
8 * @{
9 */
10/*
11 *  This file is part of AutoOpts, a companion to AutoGen.
12 *  AutoOpts is free software.
13 *  AutoOpts is Copyright (C) 1992-2015 by Bruce Korb - all rights reserved
14 *
15 *  AutoOpts is available under any one of two licenses.  The license
16 *  in use must be one of these two and the choice is under the control
17 *  of the user of the license.
18 *
19 *   The GNU Lesser General Public License, version 3 or later
20 *      See the files "COPYING.lgplv3" and "COPYING.gplv3"
21 *
22 *   The Modified Berkeley Software Distribution License
23 *      See the file "COPYING.mbsd"
24 *
25 *  These files have the following sha256 sums:
26 *
27 *  8584710e9b04216a394078dc156b781d0b47e1729104d666658aecef8ee32e95  COPYING.gplv3
28 *  4379e7444a0e2ce2b12dd6f5a52a27a4d02d39d247901d3285c88cf0d37f477b  COPYING.lgplv3
29 *  13aa749a5b0a454917a944ed8fffc530b784f5ead522b1aacaf4ec8aa55a6239  COPYING.mbsd
30 */
31
32static void
33optionReset(tOptions * pOpts, tOptDesc * pOD)
34{
35    pOD->fOptState &= OPTST_PERSISTENT_MASK;
36    pOD->fOptState |= OPTST_RESET;
37    if (pOD->pOptProc != NULL)
38        pOD->pOptProc(pOpts, pOD);
39    pOD->optArg.argString =
40        pOpts->originalOptArgArray[ pOD->optIndex ].argString;
41    pOD->optCookie = pOpts->originalOptArgCookie[ pOD->optIndex ];
42    pOD->fOptState &= OPTST_PERSISTENT_MASK;
43}
44
45
46static void
47optionResetEverything(tOptions * pOpts)
48{
49    tOptDesc * pOD = pOpts->pOptDesc;
50    int        ct  = pOpts->presetOptCt;
51
52    for (;;) {
53        optionReset(pOpts, pOD);
54
55        if (--ct <= 0)
56            break;
57        pOD++;
58    }
59}
60
61
62/*=export_func  optionResetOpt
63 * private:
64 *
65 * what:  Reset the value of an option
66 * arg:   + tOptions * + pOpts    + program options descriptor  +
67 * arg:   + tOptDesc * + pOptDesc + the descriptor for this arg +
68 *
69 * doc:
70 *  This code will cause another option to be reset to its initial state.
71 *  For example, --reset=foo will cause the --foo option to be reset.
72=*/
73void
74optionResetOpt(tOptions * pOpts, tOptDesc * pOD)
75{
76    static bool reset_active = false;
77
78    tOptState opt_state = OPTSTATE_INITIALIZER(DEFINED);
79    char const * pzArg = pOD->optArg.argString;
80    tSuccess     succ;
81
82    if (pOpts <= OPTPROC_EMIT_LIMIT)
83        return;
84
85    if (reset_active)
86        return;
87
88    if (  (! HAS_originalOptArgArray(pOpts))
89       || (pOpts->originalOptArgCookie == NULL))
90        ao_bug(zno_reset);
91
92    if ((pzArg == NULL) || (*pzArg == NUL)) {
93        fprintf(stderr, zreset_arg, pOpts->pzProgName, pOD->pz_Name);
94        pOpts->pUsageProc(pOpts, EXIT_FAILURE);
95        /* NOTREACHED */
96        assert(0 == 1);
97    }
98
99    reset_active = true;
100
101    if (pzArg[1] == NUL) {
102        if (*pzArg == '*') {
103            optionResetEverything(pOpts);
104            reset_active = false;
105            return;
106        }
107
108        succ = opt_find_short(pOpts, (uint8_t)*pzArg, &opt_state);
109        if (! SUCCESSFUL(succ)) {
110            fprintf(stderr, zIllOptChr, pOpts->pzProgPath, *pzArg);
111            pOpts->pUsageProc(pOpts, EXIT_FAILURE);
112            /* NOTREACHED */
113            assert(0 == 1);
114        }
115    } else {
116        succ = opt_find_long(pOpts, (char *)pzArg, &opt_state);
117        if (! SUCCESSFUL(succ)) {
118            fprintf(stderr, zIllOptStr, pOpts->pzProgPath, pzArg);
119            pOpts->pUsageProc(pOpts, EXIT_FAILURE);
120            /* NOTREACHED */
121            assert(0 == 1);
122        }
123    }
124
125    /*
126     *  We've found the indicated option.  Turn off all non-persistent
127     *  flags because we're forcing the option back to its initialized state.
128     *  Call any callout procedure to handle whatever it needs to.
129     *  Finally, clear the reset flag, too.
130     */
131    optionReset(pOpts, opt_state.pOD);
132    reset_active = false;
133}
134/** @}
135 *
136 * Local Variables:
137 * mode: C
138 * c-file-style: "stroustrup"
139 * indent-tabs-mode: nil
140 * End:
141 * end of autoopts/reset.c */
142