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 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 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