1 /* 2 * Copyright (c) 1987, 1993, 1994, 1995 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #ifndef lint 9 static char copyright[] = 10 "@(#) Copyright (c) 1987, 1993, 1994, 1995\n\ 11 The Regents of the University of California. All rights reserved.\n"; 12 #endif /* not lint */ 13 14 #ifndef lint 15 static char sccsid[] = "@(#)ctags.c 8.4 (Berkeley) 02/07/95"; 16 #endif /* not lint */ 17 18 #include <err.h> 19 #include <limits.h> 20 #include <stdio.h> 21 #include <string.h> 22 #include <stdlib.h> 23 #include <unistd.h> 24 25 #include "ctags.h" 26 27 /* 28 * ctags: create a tags file 29 */ 30 31 NODE *head; /* head of the sorted binary tree */ 32 33 /* boolean "func" (see init()) */ 34 bool _wht[256], _etk[256], _itk[256], _btk[256], _gd[256]; 35 36 FILE *inf; /* ioptr for current input file */ 37 FILE *outf; /* ioptr for tags file */ 38 39 long lineftell; /* ftell after getc( inf ) == '\n' */ 40 41 int lineno; /* line number of current line */ 42 int dflag; /* -d: non-macro defines */ 43 int tflag; /* -t: create tags for typedefs */ 44 int vflag; /* -v: vgrind style index output */ 45 int wflag; /* -w: suppress warnings */ 46 int xflag; /* -x: cxref style output */ 47 48 char *curfile; /* current input file name */ 49 char searchar = '/'; /* use /.../ searches by default */ 50 char lbuf[LINE_MAX]; 51 52 void init __P((void)); 53 void find_entries __P((char *)); 54 55 int 56 main(argc, argv) 57 int argc; 58 char **argv; 59 { 60 static char *outfile = "tags"; /* output file */ 61 int aflag; /* -a: append to tags */ 62 int uflag; /* -u: update tags */ 63 int exit_val; /* exit value */ 64 int step; /* step through args */ 65 int ch; /* getopts char */ 66 char cmd[100]; /* too ugly to explain */ 67 68 aflag = uflag = NO; 69 while ((ch = getopt(argc, argv, "BFadf:tuwvx")) != EOF) 70 switch(ch) { 71 case 'B': 72 searchar = '?'; 73 break; 74 case 'F': 75 searchar = '/'; 76 break; 77 case 'a': 78 aflag++; 79 break; 80 case 'd': 81 dflag++; 82 break; 83 case 'f': 84 outfile = optarg; 85 break; 86 case 't': 87 tflag++; 88 break; 89 case 'u': 90 uflag++; 91 break; 92 case 'w': 93 wflag++; 94 break; 95 case 'v': 96 vflag++; 97 case 'x': 98 xflag++; 99 break; 100 case '?': 101 default: 102 goto usage; 103 } 104 argv += optind; 105 argc -= optind; 106 if (!argc) { 107 usage: (void)fprintf(stderr, 108 "usage: ctags [-BFadtuwvx] [-f tagsfile] file ...\n"); 109 exit(1); 110 } 111 112 init(); 113 114 for (exit_val = step = 0; step < argc; ++step) 115 if (!(inf = fopen(argv[step], "r"))) { 116 warn("%s", argv[step]); 117 exit_val = 1; 118 } 119 else { 120 curfile = argv[step]; 121 find_entries(argv[step]); 122 (void)fclose(inf); 123 } 124 125 if (head) 126 if (xflag) 127 put_entries(head); 128 else { 129 if (uflag) { 130 for (step = 0; step < argc; step++) { 131 (void)sprintf(cmd, 132 "mv %s OTAGS; fgrep -v '\t%s\t' OTAGS >%s; rm OTAGS", 133 outfile, argv[step], 134 outfile); 135 system(cmd); 136 } 137 ++aflag; 138 } 139 if (!(outf = fopen(outfile, aflag ? "a" : "w"))) 140 err(exit_val, "%s", outfile); 141 put_entries(head); 142 (void)fclose(outf); 143 if (uflag) { 144 (void)sprintf(cmd, "sort -o %s %s", 145 outfile, outfile); 146 system(cmd); 147 } 148 } 149 exit(exit_val); 150 } 151 152 /* 153 * init -- 154 * this routine sets up the boolean psuedo-functions which work by 155 * setting boolean flags dependent upon the corresponding character. 156 * Every char which is NOT in that string is false with respect to 157 * the pseudo-function. Therefore, all of the array "_wht" is NO 158 * by default and then the elements subscripted by the chars in 159 * CWHITE are set to YES. Thus, "_wht" of a char is YES if it is in 160 * the string CWHITE, else NO. 161 */ 162 void 163 init() 164 { 165 int i; 166 unsigned char *sp; 167 168 for (i = 0; i < 256; i++) { 169 _wht[i] = _etk[i] = _itk[i] = _btk[i] = NO; 170 _gd[i] = YES; 171 } 172 #define CWHITE " \f\t\n" 173 for (sp = CWHITE; *sp; sp++) /* white space chars */ 174 _wht[*sp] = YES; 175 #define CTOKEN " \t\n\"'#()[]{}=-+%*/&|^~!<>;,.:?" 176 for (sp = CTOKEN; *sp; sp++) /* token ending chars */ 177 _etk[*sp] = YES; 178 #define CINTOK "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz0123456789" 179 for (sp = CINTOK; *sp; sp++) /* valid in-token chars */ 180 _itk[*sp] = YES; 181 #define CBEGIN "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz" 182 for (sp = CBEGIN; *sp; sp++) /* token starting chars */ 183 _btk[*sp] = YES; 184 #define CNOTGD ",;" 185 for (sp = CNOTGD; *sp; sp++) /* invalid after-function chars */ 186 _gd[*sp] = NO; 187 } 188 189 /* 190 * find_entries -- 191 * this routine opens the specified file and calls the function 192 * which searches the file. 193 */ 194 void 195 find_entries(file) 196 char *file; 197 { 198 char *cp; 199 200 lineno = 0; /* should be 1 ?? KB */ 201 if (cp = strrchr(file, '.')) { 202 if (cp[1] == 'l' && !cp[2]) { 203 int c; 204 205 for (;;) { 206 if (GETC(==, EOF)) 207 return; 208 if (!iswhite(c)) { 209 rewind(inf); 210 break; 211 } 212 } 213 #define LISPCHR ";([" 214 /* lisp */ if (strchr(LISPCHR, c)) { 215 l_entries(); 216 return; 217 } 218 /* lex */ else { 219 /* 220 * we search all 3 parts of a lex file 221 * for C references. This may be wrong. 222 */ 223 toss_yysec(); 224 (void)strcpy(lbuf, "%%$"); 225 pfnote("yylex", lineno); 226 rewind(inf); 227 } 228 } 229 /* yacc */ else if (cp[1] == 'y' && !cp[2]) { 230 /* 231 * we search only the 3rd part of a yacc file 232 * for C references. This may be wrong. 233 */ 234 toss_yysec(); 235 (void)strcpy(lbuf, "%%$"); 236 pfnote("yyparse", lineno); 237 y_entries(); 238 } 239 /* fortran */ else if ((cp[1] != 'c' && cp[1] != 'h') && !cp[2]) { 240 if (PF_funcs()) 241 return; 242 rewind(inf); 243 } 244 } 245 /* C */ c_entries(); 246 } 247