1: (* 2: * Copyright (c) 1980 Regents of the University of California. 3: * All rights reserved. The Berkeley software License Agreement 4: * specifies the terms and conditions for redistribution. 5: * 6: * @(#)pxref.p 5.4 (Berkeley) 6/21/85 7: *) 8: 9: {$t-,p-,b2,w+} 10: program xref(input, output); 11: label 12: 99, 100; 13: const 14: alfasize = 18; 15: linesize = 10; 16: namesize = 64; 17: linelength = 133; 18: maxlineno = 30000; 19: charclassize = 127; 20: p = 1000; 21: nk = 36; 22: blanks = ' '; 23: type 24: alfa = 25: array[1..alfasize] of 26: char; 27: index = 0..p; 28: linptr = 0..linelength; 29: linebuf = array[1..linelength] of char; 30: ref = ^item; 31: filename = array [1..namesize] of char; 32: charclasses = (digit, letter, separator, illegal); 33: charclasstype = array[0..charclassize] of charclasses; 34: word = 35: record 36: key: alfa; 37: first, last: ref; 38: fol: index 39: end; 40: item = packed 41: record 42: lno: 0..maxlineno; 43: next: ref 44: end; 45: var 46: i, top: index; 47: formfeed :char; 48: scr: alfa; 49: list: boolean; 50: k, k1: integer; 51: n: integer; 52: c1, c2: integer; 53: inputfile : filename; 54: lineptr :linptr; 55: line :linebuf; 56: charclass :charclasstype; 57: id: 58: record 59: case boolean of 60: false:( 61: a: alfa 62: ); 63: true:( 64: ord: integer 65: ) 66: end; 67: a: array [1..alfasize] of char; 68: t: array [index] of word; 69: key: array [1..nk] of alfa; 70: empty: alfa; 71: 72: function nokey(x: alfa): Boolean; 73: var 74: i, j, k: integer; 75: begin 76: i := 1; 77: j := nk; 78: repeat 79: k := (i + j) div 2; 80: if key[k] <= x then 81: i := k + 1; 82: if key[k] >= x then 83: j := k - 1 84: until i > j; 85: nokey := key[k] <> x 86: end { nokey }; 87: 88: procedure search; 89: var 90: h, d: index; 91: x: ref; 92: f: Boolean; 93: begin 94: h := id.ord div 4096 mod p; 95: f := false; 96: d := 1; 97: c2 := c2 + 1; 98: new(x); 99: x^.lno := n; 100: x^.next := nil; 101: repeat 102: if t[h].key = id.a then begin 103: f := true; 104: t[h].last^.next := x; 105: t[h].last := x 106: end else if t[h].key = empty then begin 107: f := true; 108: c1 := c1 + 1; 109: t[h].key := id.a; 110: t[h].first := x; 111: t[h].last := x; 112: t[h].fol := top; 113: top := h 114: end else begin 115: h := (h + d) mod p; 116: d := d + 2; 117: if d >= p then begin 118: writeln; 119: writeln(' **** table full'); 120: goto 99 121: end 122: end 123: until f 124: end { search }; 125: 126: procedure printword(w: word); 127: var 128: l: integer; 129: x: ref; 130: begin 131: write(' ', w.key); 132: x := w.first; 133: l := 0; 134: repeat 135: if l = linesize then begin 136: l := 0; 137: writeln; 138: write(' ', empty) 139: end; 140: l := l + 1; 141: write(x^.lno: 6); 142: x := x^.next 143: until x = nil; 144: writeln 145: end { printword }; 146: 147: procedure printtable; 148: var 149: i, j, m: index; 150: begin 151: i := top; 152: while i <> p do begin 153: m := i; 154: j := t[i].fol; 155: while j <> p do begin 156: if t[j].key < t[m].key then 157: m := j; 158: j := t[j].fol 159: end; 160: printword(t[m]); 161: if m <> i then begin 162: t[m].key := t[i].key; 163: t[m].first := t[i].first; 164: t[m].last := t[i].last 165: end; 166: i := t[i].fol 167: end 168: end { printtable }; 169: 170: procedure readinput(var inpfile :filename); 171: var 172: inp :file of char; 173: 174: procedure lwriteln; 175: begin 176: if list then begin 177: { write sans trailing blanks } 178: if lineptr > 0 then 179: writeln(line: lineptr) 180: else 181: writeln; 182: end; 183: get(inp); 184: lineptr:=0 185: end { lwriteln }; 186: 187: procedure newline; 188: begin 189: n:=n+1; 190: if n = maxlineno then begin 191: writeln(' text too long'); 192: goto 99 193: end; 194: if inp^ = formfeed then begin 195: if list then 196: page(output); 197: get(inp) 198: end; 199: if list then 200: if not eoln(inp) then 201: write(n:6,' ') 202: end { newline }; 203: 204: begin 205: reset(inp,inpfile); 206: while not eof(inp) do begin 207: newline; 208: if inp^ = '#' then begin 209: while inp^ <> '"' do begin 210: lineptr:=lineptr+1; 211: read(inp,line[lineptr]) 212: end; 213: lineptr:=lineptr+1; 214: read(inp,line[lineptr]); 215: k:=0; 216: inputfile:=blanks; 217: repeat 218: k:=k+1; 219: if k <= namesize then 220: inputfile[k]:=inp^; 221: lineptr:=lineptr+1; 222: read(inp,line[lineptr]) 223: until inp^ = '"'; 224: while not eoln(inp) do begin 225: lineptr:=lineptr+1; 226: read(inp,line[lineptr]) 227: end; 228: id.a := '#include'; 229: search; 230: lwriteln; 231: readinput(inputfile); 232: end else begin 233: while not eoln(inp) do begin 234: if (inp^ = ' ') or (inp^ = tab) then begin 235: lineptr:=lineptr+1; 236: read(inp,line[lineptr]) 237: end else if charclass[ord(inp^)] = letter then begin 238: k := 0; 239: a:=blanks; 240: repeat 241: k := k + 1; 242: if k <= alfasize then 243: a[k] := inp^; 244: lineptr:=lineptr+1; 245: read(inp,line[lineptr]) 246: until (charclass[ord(inp^)] <> letter) and 247: (charclass[ord(inp^)] <> digit); 248: pack(a, 1, id.a); 249: if nokey(id.a) then 250: search 251: end else if charclass[ord(inp^)] = digit then 252: repeat 253: lineptr:=lineptr+1; 254: read(inp,line[lineptr]) 255: until charclass[ord(inp^)] <> digit 256: else if inp^='''' then begin 257: repeat 258: lineptr:=lineptr+1; 259: read(inp,line[lineptr]) 260: until inp^ = ''''; 261: lineptr:=lineptr+1; 262: read(inp,line[lineptr]) 263: end else if inp^ = '{' then begin 264: repeat 265: lineptr:=lineptr+1; 266: read(inp,line[lineptr]); 267: while eoln(inp) do begin 268: lwriteln; 269: newline 270: end 271: until inp^ = '}'; 272: lineptr:=lineptr+1; 273: read(inp,line[lineptr]) 274: end else if inp^ = '(' then begin 275: lineptr:=lineptr+1; 276: read(inp,line[lineptr]); 277: if inp^ = '*' then begin 278: lineptr:=lineptr+1; 279: read(inp,line[lineptr]); 280: repeat 281: while inp^ <> '*' do 282: if eoln(inp) then begin 283: lwriteln; 284: newline 285: end else begin 286: lineptr:=lineptr+1; 287: read(inp,line[lineptr]) 288: end; 289: lineptr:=lineptr+1; 290: read(inp,line[lineptr]) 291: until inp^ = ')'; 292: lineptr:=lineptr+1; 293: read(inp,line[lineptr]) 294: end 295: end else begin 296: lineptr:=lineptr+1; 297: read(inp,line[lineptr]); 298: end 299: end; { scan of token } 300: lwriteln; 301: end; { scan of line } 302: end; { while not eof } 303: end; {readinput } 304: 305: begin { xref } 306: empty := blanks; 307: list := true; 308: if argc = 3 then begin 309: argv(1, scr); 310: if (scr[1] <> '-') or (scr[2] <> ' ') then begin 311: writeln('usage: pxref [ - ] file'); 312: goto 100 313: end; 314: list := false 315: end; 316: if (argc < 2) or (argc > 3) then begin 317: writeln('usage: pxref [ - ] file'); 318: goto 100 319: end; 320: for i := 0 to p - 1 do 321: t[i].key := empty; 322: c1 := 0; 323: c2 := 0; 324: key[1] := 'and'; 325: key[2] := 'array'; 326: key[3] := 'assert'; 327: key[4] := 'begin'; 328: key[5] := 'case'; 329: key[6] := 'const'; 330: key[7] := 'div'; 331: key[8] := 'do'; 332: key[9] := 'downto'; 333: key[10] := 'else'; 334: key[11] := 'end'; 335: key[12] := 'file'; 336: key[13] := 'for'; 337: key[14] := 'function'; 338: key[15] := 'hex'; 339: key[16] := 'if'; 340: key[17] := 'in'; 341: key[18] := 'mod'; 342: key[19] := 'nil'; 343: key[20] := 'not'; 344: key[21] := 'oct'; 345: key[22] := 'of'; 346: key[23] := 'or'; 347: key[24] := 'packed'; 348: key[25] := 'procedure'; 349: key[26] := 'program'; 350: key[27] := 'record'; 351: key[28] := 'repeat'; 352: key[29] := 'set'; 353: key[30] := 'then'; 354: key[31] := 'to'; 355: key[32] := 'type'; 356: key[33] := 'until'; 357: key[34] := 'var'; 358: key[35] := 'while'; 359: key[36] := 'with'; 360: for k:= 0 to charclassize do 361: charclass[k]:=illegal; 362: for k:=ord('a') to ord('z') do 363: charclass[k]:=letter; 364: for k:=ord('A') to ord('Z') do 365: charclass[k]:=letter; 366: for k:=ord('0') to ord('9') do 367: charclass[k]:=digit; 368: charclass[ord('_')]:=letter; 369: charclass[ord(' ')]:=separator; 370: charclass[ord(tab)]:=separator; 371: n := 0; 372: lineptr:=0; 373: line:=blanks; 374: top := p; 375: k1 := alfasize; 376: formfeed:=chr(12); 377: if list then 378: argv(1,inputfile) 379: else 380: argv(2,inputfile); 381: readinput(inputfile); 382: 99: 383: if list then begin 384: page(output); 385: writeln; 386: end; 387: printtable; 388: writeln; 389: writeln(c1, ' identifiers', c2, ' occurrences'); 390: 100: 391: {nil} 392: end { xref }.
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Last modified: 1985-06-22
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