1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1986-2007 AT&T Knowledge Ventures * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Knowledge Ventures * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * * 19 ***********************************************************************/ 20 #pragma prototyped 21 /* 22 * Glenn Fowler 23 * AT&T Research 24 * 25 * common preprocessor line sync handler 26 */ 27 28 #include "pplib.h" 29 30 void 31 ppline(int line, char* file) 32 { 33 char* s; 34 static char type[5]; 35 36 if (pp.flags & PP_lineignore) 37 { 38 pp.flags &= ~PP_lineignore; 39 if (!(pp.flags & PP_linetype) || *pp.lineid) 40 { 41 ppline(1, file); 42 file = error_info.file; 43 } 44 else 45 type[1] = PP_sync_ignore; 46 } 47 else if (file != pp.lastfile) 48 { 49 if (!pp.firstfile) 50 pp.firstfile = file; 51 type[1] = ((pp.flags & PP_linetype) && !*pp.lineid && pp.lastfile) ? (line <= 1 ? (file == pp.firstfile ? PP_sync : PP_sync_push) : PP_sync_pop) : PP_sync; 52 pp.lastfile = file; 53 } 54 else 55 { 56 if (!(pp.flags & PP_linefile)) 57 file = 0; 58 type[1] = PP_sync; 59 } 60 if (!(pp.flags & PP_linetype) || *pp.lineid || type[1] == PP_sync) 61 type[0] = 0; 62 else 63 { 64 type[0] = ' '; 65 if ((pp.flags & (PP_hosted|PP_linehosted)) == (PP_hosted|PP_linehosted)) 66 { 67 type[2] = ' '; 68 type[3] = PP_sync_hosted; 69 } 70 else 71 type[2] = 0; 72 } 73 74 /* 75 * some front ends can't handle two line syncs in a row 76 */ 77 78 if (pp.pending == pppendout() || pplastout() != '\n') 79 ppputchar('\n'); 80 if (file) 81 ppprintf("#%s %d \"%s\"%s\n", pp.lineid, line, (pp.flags & PP_linebase) && (s = strrchr(file, '/')) ? s + 1 : file, type); 82 else 83 ppprintf("#%s %d\n", pp.lineid, line); 84 if (!pp.macref) 85 pp.pending = pppendout(); 86 } 87