usr.bin/jot/jot.c

   1 /*-
   2  * Copyright (c) 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * @(#) Copyright (c) 1993 The Regents of the University of California.  All rights reserved.
  30  * @(#)jot.c    8.1 (Berkeley) 6/6/93
  31  * $FreeBSD: src/usr.bin/jot/jot.c,v 1.13.2.3 2001/12/17 13:49:50 gallatin Exp $
  32  */
  33
  34 /*
  35  * jot - print sequential or random data
  36  *
  37  * Author:  John Kunze, Office of Comp. Affairs, UCB
  38  */
  39
  40 #include <ctype.h>
  41 #include <err.h>
  42 #include <limits.h>
  43 #include <stdio.h>
  44 #include <stdlib.h>
  45 #include <stdint.h>
  46 #include <string.h>
  47 #include <time.h>
  48 #include <unistd.h>
  49
  50 #define REPS_DEF        100
  51 #define BEGIN_DEF       1
  52 #define ENDER_DEF       100
  53 #define STEP_DEF        1
  54
  55 #define is_default(s)   (strcmp((s), "-") == 0)
  56
  57 double  begin;
  58 double  ender;
  59 double  s;
  60 long    reps;
  61 int     randomize;
  62 int     infinity;
  63 int     boring;
  64 int     prec;
  65 int     longdata;
  66 int     intdata;
  67 int     chardata;
  68 int     nosign;
  69 int     nofinalnl;
  70 const   char *sepstring = "\n";
  71 char    format[BUFSIZ];
  72
  73 void            getformat(void);
  74 int             getprec(char *);
  75 int             putdata(double, long);
  76 static void     usage(void) __dead2;
  77
  78 int
  79 main(int argc, char **argv)
  80 {
  81         double  xd, yd;
  82         long    id;
  83         double  *x = &xd;
  84         double  *y = &yd;
  85         long    *i = &id;
  86         unsigned int    mask = 0;
  87         int     n = 0;
  88         int     ch;
  89
  90         while ((ch = getopt(argc, argv, "rb:w:cs:np:")) != -1)
  91                 switch ((char)ch) {
  92                 case 'r':
  93                         randomize = 1;
  94                         break;
  95                 case 'c':
  96                         chardata = 1;
  97                         break;
  98                 case 'n':
  99                         nofinalnl = 1;
 100                         break;
 101                 case 'b':
 102                         boring = 1;
 103                         /* FALLTHROUGH */
 104                 case 'w':
 105                         if (strlcpy(format, optarg, sizeof(format)) >=
 106                             sizeof(format))
 107                                 errx(1, "-%c word too long", ch);
 108                         break;
 109                 case 's':
 110                         sepstring = optarg;
 111                         break;
 112                 case 'p':
 113                         prec = atoi(optarg);
 114                         if (prec <= 0)
 115                                 errx(1, "bad precision value");
 116                         break;
 117                 default:
 118                         usage();
 119                 }
 120         argc -= optind;
 121         argv += optind;
 122
 123         switch (argc) { /* examine args right to left, falling thru cases */
 124         case 4:
 125                 if (!is_default(argv[3])) {
 126                         if (!sscanf(argv[3], "%lf", &s))
 127                                 errx(1, "bad s value: %s", argv[3]);
 128                         mask |= 01;
 129                 }
 130         case 3:
 131                 if (!is_default(argv[2])) {
 132                         if (!sscanf(argv[2], "%lf", &ender))
 133                                 ender = argv[2][strlen(argv[2])-1];
 134                         mask |= 02;
 135                         if (!prec)
 136                                 n = getprec(argv[2]);
 137                 }
 138         case 2:
 139                 if (!is_default(argv[1])) {
 140                         if (!sscanf(argv[1], "%lf", &begin))
 141                                 begin = argv[1][strlen(argv[1])-1];
 142                         mask |= 04;
 143                         if (!prec)
 144                                 prec = getprec(argv[1]);
 145                         if (n > prec)           /* maximum precision */
 146                                 prec = n;
 147                 }
 148         case 1:
 149                 if (!is_default(argv[0])) {
 150                         if (!sscanf(argv[0], "%ld", &reps))
 151                                 errx(1, "bad reps value: %s", argv[0]);
 152                         mask |= 010;
 153                 }
 154                 break;
 155         case 0:
 156                 usage();
 157         default:
 158                 errx(1, "too many arguments.  What do you mean by %s?",
 159                     argv[4]);
 160         }
 161         getformat();
 162         while (mask)    /* 4 bit mask has 1's where last 4 args were given */
 163                 switch (mask) { /* fill in the 0's by default or computation */
 164                 case 001:
 165                         reps = REPS_DEF;
 166                         mask = 011;
 167                         break;
 168                 case 002:
 169                         reps = REPS_DEF;
 170                         mask = 012;
 171                         break;
 172                 case 003:
 173                         reps = REPS_DEF;
 174                         mask = 013;
 175                         break;
 176                 case 004:
 177                         reps = REPS_DEF;
 178                         mask = 014;
 179                         break;
 180                 case 005:
 181                         reps = REPS_DEF;
 182                         mask = 015;
 183                         break;
 184                 case 006:
 185                         reps = REPS_DEF;
 186                         mask = 016;
 187                         break;
 188                 case 007:
 189                         if (randomize) {
 190                                 reps = REPS_DEF;
 191                                 mask = 0;
 192                                 break;
 193                         }
 194                         if (s == 0.0) {
 195                                 reps = 0;
 196                                 mask = 0;
 197                                 break;
 198                         }
 199                         reps = (ender - begin + s) / s;
 200                         if (reps <= 0)
 201                                 errx(1, "impossible stepsize");
 202                         mask = 0;
 203                         break;
 204                 case 010:
 205                         begin = BEGIN_DEF;
 206                         mask = 014;
 207                         break;
 208                 case 011:
 209                         begin = BEGIN_DEF;
 210                         mask = 015;
 211                         break;
 212                 case 012:
 213                         s = (randomize ? time(NULL) : STEP_DEF);
 214                         mask = 013;
 215                         break;
 216                 case 013:
 217                         if (randomize)
 218                                 begin = BEGIN_DEF;
 219                         else if (reps == 0)
 220                                 errx(1, "must specify begin if reps == 0");
 221                         begin = ender - reps * s + s;
 222                         mask = 0;
 223                         break;
 224                 case 014:
 225                         s = (randomize ? -1.0 : STEP_DEF);
 226                         mask = 015;
 227                         break;
 228                 case 015:
 229                         if (randomize)
 230                                 ender = ENDER_DEF;
 231                         else
 232                                 ender = begin + reps * s - s;
 233                         mask = 0;
 234                         break;
 235                 case 016:
 236                         if (randomize)
 237                                 s = -1.0;
 238                         else if (reps == 0)
 239                                 errx(1, "infinite sequences cannot be bounded");
 240                         else if (reps == 1)
 241                                 s = 0.0;
 242                         else
 243                                 s = (ender - begin) / (reps - 1);
 244                         mask = 0;
 245                         break;
 246                 case 017:               /* if reps given and implied, */
 247                         if (!randomize && s != 0.0) {
 248                                 long t = (ender - begin + s) / s;
 249                                 if (t <= 0)
 250                                         errx(1, "impossible stepsize");
 251                                 if (t < reps)           /* take lesser */
 252                                         reps = t;
 253                         }
 254                         mask = 0;
 255                         break;
 256                 default:
 257                         errx(1, "bad mask");
 258                 }
 259         if (reps == 0)
 260                 infinity = 1;
 261         if (randomize) {
 262                 *x = (ender - begin) * (ender > begin ? 1 : -1);
 263                 for (*i = 1; *i <= reps || infinity; (*i)++) {
 264                         *y = arc4random() / (double)0xffffffffU;
 265                         if (putdata(*y * *x + begin, reps - *i))
 266                                 errx(1, "range error in conversion");
 267                 }
 268         } else
 269                 for (*i = 1, *x = begin; *i <= reps || infinity; (*i)++, *x += s)
 270                         if (putdata(*x, reps - *i))
 271                                 errx(1, "range error in conversion");
 272         if (!nofinalnl)
 273                 putchar('\n');
 274         exit(0);
 275 }
 276
 277 int
 278 putdata(double x, long notlast)
 279 {
 280
 281         if (boring)
 282                 printf("%s", format);
 283         else if (longdata && nosign) {
 284                 if (x <= (double)ULONG_MAX && x >= (double)0)
 285                         printf(format, (unsigned long)x);
 286                 else
 287                         return (1);
 288         } else if (longdata) {
 289                 if (x <= (double)LONG_MAX && x >= (double)LONG_MIN)
 290                         printf(format, (long)x);
 291                 else
 292                         return (1);
 293         } else if (chardata || (intdata && !nosign)) {
 294                 if (x <= (double)INT_MAX && x >= (double)INT_MIN)
 295                         printf(format, (int)x);
 296                 else
 297                         return (1);
 298         } else if (intdata) {
 299                 if (x <= (double)UINT_MAX && x >= (double)0)
 300                         printf(format, (unsigned int)x);
 301                 else
 302                         return (1);
 303
 304         } else
 305                 printf(format, x);
 306         if (notlast != 0)
 307                 fputs(sepstring, stdout);
 308
 309         return (0);
 310 }
 311
 312 static void
 313 usage(void)
 314 {
 315         fprintf(stderr, "%s\n%s\n",
 316         "usage: jot [-cnr] [-b word] [-w word] [-s string] [-p precision]",
 317         "           [reps [begin [end [s]]]]");
 318         exit(1);
 319 }
 320
 321 int
 322 getprec(char *str)
 323 {
 324         char    *p;
 325         char    *q;
 326
 327         for (p = str; *p; p++)
 328                 if (*p == '.')
 329                         break;
 330         if (!*p)
 331                 return (0);
 332         for (q = ++p; *p; p++)
 333                 if (!isdigit(*p))
 334                         break;
 335         return (p - q);
 336 }
 337
 338 void
 339 getformat(void)
 340 {
 341         char    *p, *p2;
 342         int dot, hash, space, sign, numbers = 0;
 343         size_t sz;
 344
 345         if (boring)                             /* no need to bother */
 346                 return;
 347         for (p = format; *p; p++)               /* look for '%' */
 348                 if (*p == '%' && *(p+1) != '%') /* leave %% alone */
 349                         break;
 350         sz = sizeof(format) - strlen(format) - 1;
 351         if (!*p && !chardata) {
 352                 if (snprintf(p, sz, "%%.%df", prec) >= (int)sz)
 353                         errx(1, "-w word too long");
 354         } else if (!*p && chardata) {
 355                 if (strlcpy(p, "%c", sz) >= sz)
 356                         errx(1, "-w word too long");
 357                 intdata = 1;
 358         } else if (!*(p+1)) {
 359                 if (sz <= 0)
 360                         errx(1, "-w word too long");
 361                 strcat(format, "%");            /* cannot end in single '%' */
 362         } else {
 363                 /*
 364                  * Allow conversion format specifiers of the form
 365                  * %[#][ ][{+,-}][0-9]*[.[0-9]*]? where ? must be one of
 366                  * [l]{d,i,o,u,x} or {f,e,g,E,G,d,o,x,D,O,U,X,c,u}
 367                  */
 368                 p2 = p++;
 369                 dot = hash = space = sign = numbers = 0;
 370                 while (!isalpha(*p)) {
 371                         if (isdigit(*p)) {
 372                                 numbers++;
 373                                 p++;
 374                         } else if ((*p == '#' && !(numbers|dot|sign|space|
 375                             hash++)) ||
 376                             (*p == ' ' && !(numbers|dot|space++)) ||
 377                             ((*p == '+' || *p == '-') && !(numbers|dot|sign++))
 378                             || (*p == '.' && !(dot++)))
 379                                 p++;
 380                         else
 381                                 goto fmt_broken;
 382                 }
 383                 if (*p == 'l') {
 384                         longdata = 1;
 385                         if (*++p == 'l') {
 386                                 if (p[1] != '\0')
 387                                         p++;
 388                                 goto fmt_broken;
 389                         }
 390                 }
 391                 switch (*p) {
 392                 case 'o': case 'u': case 'x': case 'X':
 393                         intdata = nosign = 1;
 394                         break;
 395                 case 'd': case 'i':
 396                         intdata = 1;
 397                         break;
 398                 case 'D':
 399                         if (!longdata) {
 400                                 intdata = 1;
 401                                 break;
 402                         }
 403                 case 'O': case 'U':
 404                         if (!longdata) {
 405                                 intdata = nosign = 1;
 406                                 break;
 407                         }
 408                 case 'c':
 409                         if (!(intdata | longdata)) {
 410                                 chardata = 1;
 411                                 break;
 412                         }
 413                 case 'h': case 'n': case 'p': case 'q': case 's': case 'L':
 414                 case '$': case '*':
 415                         goto fmt_broken;
 416                 case 'f': case 'e': case 'g': case 'E': case 'G':
 417                         if (!longdata)
 418                                 break;
 419                         /* FALLTHROUGH */
 420                 default:
 421 fmt_broken:
 422                         *++p = '\0';
 423                         errx(1, "illegal or unsupported format '%s'", p2);
 424                         /* NOTREACHED */
 425                 }
 426                 while (*++p)
 427                         if (*p == '%' && *(p+1) && *(p+1) != '%')
 428                                 errx(1, "too many conversions");
 429                         else if (*p == '%' && *(p+1) == '%')
 430                                 p++;
 431                         else if (*p == '%' && !*(p+1)) {
 432                                 strcat(format, "%");
 433                                 break;
 434                         }
 435         }
 436 }