1 2 /* 3 * $Id: boolean.c,v 4.10 2007/02/04 17:44:12 bkorb Exp $ 4 * Time-stamp: "2007-01-13 10:10:39 bkorb" 5 * 6 * Automated Options Paged Usage module. 7 * 8 * This routine will run run-on options through a pager so the 9 * user may examine, print or edit them at their leisure. 10 */ 11 12 /* 13 * Automated Options copyright 1992-2007 Bruce Korb 14 * 15 * Automated Options is free software. 16 * You may redistribute it and/or modify it under the terms of the 17 * GNU General Public License, as published by the Free Software 18 * Foundation; either version 2, or (at your option) any later version. 19 * 20 * Automated Options is distributed in the hope that it will be useful, 21 * but WITHOUT ANY WARRANTY; without even the implied warranty of 22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 23 * GNU General Public License for more details. 24 * 25 * You should have received a copy of the GNU General Public License 26 * along with Automated Options. See the file "COPYING". If not, 27 * write to: The Free Software Foundation, Inc., 28 * 51 Franklin Street, Fifth Floor, 29 * Boston, MA 02110-1301, USA. 30 * 31 * As a special exception, Bruce Korb gives permission for additional 32 * uses of the text contained in his release of AutoOpts. 33 * 34 * The exception is that, if you link the AutoOpts library with other 35 * files to produce an executable, this does not by itself cause the 36 * resulting executable to be covered by the GNU General Public License. 37 * Your use of that executable is in no way restricted on account of 38 * linking the AutoOpts library code into it. 39 * 40 * This exception does not however invalidate any other reasons why 41 * the executable file might be covered by the GNU General Public License. 42 * 43 * This exception applies only to the code released by Bruce Korb under 44 * the name AutoOpts. If you copy code from other sources under the 45 * General Public License into a copy of AutoOpts, as the General Public 46 * License permits, the exception does not apply to the code that you add 47 * in this way. To avoid misleading anyone as to the status of such 48 * modified files, you must delete this exception notice from them. 49 * 50 * If you write modifications of your own for AutoOpts, it is your choice 51 * whether to permit this exception to apply to your modifications. 52 * If you do not wish that, delete this exception notice. 53 */ 54 55 /*=export_func optionBooleanVal 56 * private: 57 * 58 * what: Decipher a boolean value 59 * arg: + tOptions* + pOpts + program options descriptor + 60 * arg: + tOptDesc* + pOptDesc + the descriptor for this arg + 61 * 62 * doc: 63 * Decipher a true or false value for a boolean valued option argument. 64 * The value is true, unless it starts with 'n' or 'f' or "#f" or 65 * it is an empty string or it is a number that evaluates to zero. 66 =*/ 67 void 68 optionBooleanVal( tOptions* pOpts, tOptDesc* pOD ) 69 { 70 char* pz; 71 ag_bool res = AG_TRUE; 72 73 switch (*(pOD->optArg.argString)) { 74 case '0': 75 { 76 long val = strtol( pOD->optArg.argString, &pz, 0 ); 77 if ((val != 0) || (*pz != NUL)) 78 break; 79 /* FALLTHROUGH */ 80 } 81 case 'N': 82 case 'n': 83 case 'F': 84 case 'f': 85 case NUL: 86 res = AG_FALSE; 87 break; 88 case '#': 89 if (pOD->optArg.argString[1] != 'f') 90 break; 91 res = AG_FALSE; 92 } 93 94 if (pOD->fOptState & OPTST_ALLOC_ARG) { 95 AGFREE(pOD->optArg.argString); 96 pOD->fOptState &= ~OPTST_ALLOC_ARG; 97 } 98 pOD->optArg.argBool = res; 99 } 100 /* 101 * Local Variables: 102 * mode: C 103 * c-file-style: "stroustrup" 104 * indent-tabs-mode: nil 105 * End: 106 * end of autoopts/boolean.c */ 107