1 /* $NetBSD: alias.c,v 1.4 2016/01/08 21:35:41 christos Exp $ */ 2 3 4 /** 5 * \file alias.c 6 * 7 * Handle options that are aliases for another option. 8 * 9 * @addtogroup autoopts 10 * @{ 11 */ 12 /* 13 * This routine will forward an option alias to the correct option code. 14 * 15 * This file is part of AutoOpts, a companion to AutoGen. 16 * AutoOpts is free software. 17 * AutoOpts is Copyright (C) 1992-2015 by Bruce Korb - all rights reserved 18 * 19 * AutoOpts is available under any one of two licenses. The license 20 * in use must be one of these two and the choice is under the control 21 * of the user of the license. 22 * 23 * The GNU Lesser General Public License, version 3 or later 24 * See the files "COPYING.lgplv3" and "COPYING.gplv3" 25 * 26 * The Modified Berkeley Software Distribution License 27 * See the file "COPYING.mbsd" 28 * 29 * These files have the following sha256 sums: 30 * 31 * 8584710e9b04216a394078dc156b781d0b47e1729104d666658aecef8ee32e95 COPYING.gplv3 32 * 4379e7444a0e2ce2b12dd6f5a52a27a4d02d39d247901d3285c88cf0d37f477b COPYING.lgplv3 33 * 13aa749a5b0a454917a944ed8fffc530b784f5ead522b1aacaf4ec8aa55a6239 COPYING.mbsd 34 */ 35 36 LOCAL tSuccess 37 too_many_occurrences(tOptions * opts, tOptDesc * od) 38 { 39 if ((opts->fOptSet & OPTPROC_ERRSTOP) != 0) { 40 char const * eqv = (od->optEquivIndex != NO_EQUIVALENT) ? zequiv : zNil; 41 42 fprintf(stderr, ztoo_often_fmt, opts->pzProgName); 43 44 if (od->optMaxCt > 1) 45 fprintf(stderr, zat_most, od->optMaxCt, od->pz_Name, eqv); 46 else 47 fprintf(stderr, zonly_one, od->pz_Name, eqv); 48 (*opts->pUsageProc)(opts, EXIT_FAILURE); 49 /* NOTREACHED */ 50 } 51 52 return FAILURE; 53 } 54 55 /*=export_func optionAlias 56 * private: 57 * 58 * what: relay an option to its alias 59 * arg: + tOptions * + opts + program options descriptor + 60 * arg: + tOptDesc * + old_od + the descriptor for this arg + 61 * arg: + unsigned int + alias + the aliased-to option index + 62 * ret-type: int 63 * 64 * doc: 65 * Handle one option as if it had been specified as another. Exactly. 66 * Returns "-1" if the aliased-to option has appeared too many times. 67 =*/ 68 int 69 optionAlias(tOptions * opts, tOptDesc * old_od, unsigned int alias) 70 { 71 tOptDesc * new_od; 72 73 if (opts <= OPTPROC_EMIT_LIMIT) 74 return 0; 75 76 new_od = opts->pOptDesc + alias; 77 if ((unsigned)opts->optCt <= alias) { 78 fputs(zbad_alias_id, stderr); 79 option_exits(EXIT_FAILURE); 80 } 81 82 /* 83 * Copy over the option instance flags 84 */ 85 new_od->fOptState &= OPTST_PERSISTENT_MASK; 86 new_od->fOptState |= (old_od->fOptState & ~OPTST_PERSISTENT_MASK); 87 new_od->optArg.argString = old_od->optArg.argString; 88 89 /* 90 * Keep track of count only for DEFINED (command line) options. 91 * IF we have too many, build up an error message and bail. 92 */ 93 if ( (new_od->fOptState & OPTST_DEFINED) 94 && (++new_od->optOccCt > new_od->optMaxCt) ) 95 return too_many_occurrences(opts, new_od); 96 97 /* 98 * Clear the state bits and counters 99 */ 100 old_od->fOptState &= OPTST_PERSISTENT_MASK; 101 old_od->optOccCt = 0; 102 103 /* 104 * If there is a procedure to call, call it 105 */ 106 if (new_od->pOptProc != NULL) 107 (*new_od->pOptProc)(opts, new_od); 108 return 0; 109 } 110 111 /** @} 112 * 113 * Local Variables: 114 * mode: C 115 * c-file-style: "stroustrup" 116 * indent-tabs-mode: nil 117 * End: 118 * end of autoopts/alias.c */ 119