1*4887Schin /*********************************************************************** 2*4887Schin * * 3*4887Schin * This software is part of the ast package * 4*4887Schin * Copyright (c) 1985-2007 AT&T Knowledge Ventures * 5*4887Schin * and is licensed under the * 6*4887Schin * Common Public License, Version 1.0 * 7*4887Schin * by AT&T Knowledge Ventures * 8*4887Schin * * 9*4887Schin * A copy of the License is available at * 10*4887Schin * http://www.opensource.org/licenses/cpl1.0.txt * 11*4887Schin * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12*4887Schin * * 13*4887Schin * Information and Software Systems Research * 14*4887Schin * AT&T Research * 15*4887Schin * Florham Park NJ * 16*4887Schin * * 17*4887Schin * Glenn Fowler <gsf@research.att.com> * 18*4887Schin * David Korn <dgk@research.att.com> * 19*4887Schin * Phong Vo <kpv@research.att.com> * 20*4887Schin * * 21*4887Schin ***********************************************************************/ 22*4887Schin #pragma prototyped 23*4887Schin /* 24*4887Schin * Glenn Fowler 25*4887Schin * AT&T Research 26*4887Schin * 27*4887Schin * multi-pass commmand line option parse assist 28*4887Schin * 29*4887Schin * int fun(char** argv, int last) 30*4887Schin * 31*4887Schin * each fun() argument parses as much of argv as 32*4887Schin * possible starting at (opt_info.index,opt_info.offset) using 33*4887Schin * optget() 34*4887Schin * 35*4887Schin * if last!=0 then fun is the last pass to view 36*4887Schin * the current arg, otherwise fun sets opt_info.again=1 37*4887Schin * and another pass will get a crack at it 38*4887Schin * 39*4887Schin * 0 fun() return causes immediate optjoin() 0 return 40*4887Schin * 41*4887Schin * optjoin() returns non-zero if more args remain 42*4887Schin * to be parsed at opt_info.index 43*4887Schin */ 44*4887Schin 45*4887Schin #include <optlib.h> 46*4887Schin 47*4887Schin typedef int (*Optpass_f)(char**, int); 48*4887Schin 49*4887Schin int 50*4887Schin optjoin(char** argv, ...) 51*4887Schin { 52*4887Schin va_list ap; 53*4887Schin register Optpass_f fun; 54*4887Schin register Optpass_f rep; 55*4887Schin Optpass_f err; 56*4887Schin int more; 57*4887Schin int user; 58*4887Schin int last_index; 59*4887Schin int last_offset; 60*4887Schin int err_index; 61*4887Schin int err_offset; 62*4887Schin 63*4887Schin if (!opt_info.state) 64*4887Schin optget(NiL, NiL); 65*4887Schin err = rep = 0; 66*4887Schin for (;;) 67*4887Schin { 68*4887Schin va_start(ap, argv); 69*4887Schin opt_info.state->join = 0; 70*4887Schin while (fun = va_arg(ap, Optpass_f)) 71*4887Schin { 72*4887Schin last_index = opt_info.index; 73*4887Schin last_offset = opt_info.offset; 74*4887Schin opt_info.state->join++; 75*4887Schin user = (*fun)(argv, 0); 76*4887Schin more = argv[opt_info.index] != 0; 77*4887Schin if (!opt_info.again) 78*4887Schin { 79*4887Schin if (!more) 80*4887Schin { 81*4887Schin opt_info.state->join = 0; 82*4887Schin return 0; 83*4887Schin } 84*4887Schin if (!user) 85*4887Schin { 86*4887Schin if (*argv[opt_info.index] != '+') 87*4887Schin { 88*4887Schin opt_info.state->join = 0; 89*4887Schin return 1; 90*4887Schin } 91*4887Schin opt_info.again = -1; 92*4887Schin } 93*4887Schin else 94*4887Schin err = 0; 95*4887Schin } 96*4887Schin if (opt_info.again) 97*4887Schin { 98*4887Schin if (opt_info.again > 0 && (!err || err_index < opt_info.index || err_index == opt_info.index && err_offset < opt_info.offset)) 99*4887Schin { 100*4887Schin err = fun; 101*4887Schin err_index = opt_info.index; 102*4887Schin err_offset = opt_info.offset; 103*4887Schin } 104*4887Schin opt_info.again = 0; 105*4887Schin opt_info.index = opt_info.state->pindex ? opt_info.state->pindex : 1; 106*4887Schin opt_info.offset = opt_info.state->poffset; 107*4887Schin } 108*4887Schin if (!rep || opt_info.index != last_index || opt_info.offset != last_offset) 109*4887Schin rep = fun; 110*4887Schin else if (fun == rep) 111*4887Schin { 112*4887Schin if (!err) 113*4887Schin { 114*4887Schin opt_info.state->join = 0; 115*4887Schin return 1; 116*4887Schin } 117*4887Schin (*err)(argv, 1); 118*4887Schin opt_info.offset = 0; 119*4887Schin } 120*4887Schin } 121*4887Schin va_end(ap); 122*4887Schin } 123*4887Schin } 124