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  * $DragonFly: src/usr.bin/jot/jot.c,v 1.4 2004/07/31 10:19:53 eirikn Exp $
  33  */
  34
  35 /*
  36  * jot - print sequential or random data
  37  *
  38  * Author:  John Kunze, Office of Comp. Affairs, UCB
  39  */
  40
  41 #include <ctype.h>
  42 #include <err.h>
  43 #include <limits.h>
  44 #include <stdio.h>
  45 #include <stdlib.h>
  46 #include <stdint.h>
  47 #include <string.h>
  48 #include <time.h>
  49 #include <unistd.h>
  50
  51 #define REPS_DEF        100
  52 #define BEGIN_DEF       1
  53 #define ENDER_DEF       100
  54 #define STEP_DEF        1
  55
  56 #define is_default(s)   (strcmp((s), "-") == 0)
  57
  58 double  begin;
  59 double  ender;
  60 double  s;
  61 long    reps;
  62 int     randomize;
  63 int     infinity;
  64 int     boring;
  65 int     prec;
  66 int     longdata;
  67 int     intdata;
  68 int     chardata;
  69 int     nosign;
  70 int     nofinalnl;
  71 const   char *sepstring = "\n";
  72 char    format[BUFSIZ];
  73
  74 void            getformat(void);
  75 int             getprec(char *);
  76 int             putdata(double, long);
  77 static void     usage(void);
  78
  79 int
  80 main(int argc, char **argv)
  81 {
  82         double  xd, yd;
  83         long    id;
  84         double  *x = &xd;
  85         double  *y = &yd;
  86         long    *i = &id;
  87         unsigned int    mask = 0;
  88         int     n = 0;
  89         int     ch;
  90
  91         while ((ch = getopt(argc, argv, "rb:w:cs:np:")) != -1)
  92                 switch ((char)ch) {
  93                 case 'r':
  94                         randomize = 1;
  95                         break;
  96                 case 'c':
  97                         chardata = 1;
  98                         break;
  99                 case 'n':
 100                         nofinalnl = 1;
 101                         break;
 102                 case 'b':
 103                         boring = 1;
 104                         /* FALLTHROUGH */
 105                 case 'w':
 106                         if (strlcpy(format, optarg, sizeof(format)) >=
 107                             sizeof(format))
 108                                 errx(1, "-%c word too long", ch);
 109                         break;
 110                 case 's':
 111                         sepstring = optarg;
 112                         break;
 113                 case 'p':
 114                         prec = atoi(optarg);
 115                         if (prec <= 0)
 116                                 errx(1, "bad precision value");
 117                         break;
 118                 default:
 119                         usage();
 120                 }
 121         argc -= optind;
 122         argv += optind;
 123
 124         switch (argc) { /* examine args right to left, falling thru cases */
 125         case 4:
 126                 if (!is_default(argv[3])) {
 127                         if (!sscanf(argv[3], "%lf", &s))
 128                                 errx(1, "bad s value: %s", argv[3]);
 129                         mask |= 01;
 130                 }
 131         case 3:
 132                 if (!is_default(argv[2])) {
 133                         if (!sscanf(argv[2], "%lf", &ender))
 134                                 ender = argv[2][strlen(argv[2])-1];
 135                         mask |= 02;
 136                         if (!prec)
 137                                 n = getprec(argv[2]);
 138                 }
 139         case 2:
 140                 if (!is_default(argv[1])) {
 141                         if (!sscanf(argv[1], "%lf", &begin))
 142                                 begin = argv[1][strlen(argv[1])-1];
 143                         mask |= 04;
 144                         if (!prec)
 145                                 prec = getprec(argv[1]);
 146                         if (n > prec)           /* maximum precision */
 147                                 prec = n;
 148                 }
 149         case 1:
 150                 if (!is_default(argv[0])) {
 151                         if (!sscanf(argv[0], "%ld", &reps))
 152                                 errx(1, "bad reps value: %s", argv[0]);
 153                         mask |= 010;
 154                 }
 155                 break;
 156         case 0:
 157                 usage();
 158         default:
 159                 errx(1, "too many arguments.  What do you mean by %s?",
 160                     argv[4]);
 161         }
 162         getformat();
 163         while (mask)    /* 4 bit mask has 1's where last 4 args were given */
 164                 switch (mask) { /* fill in the 0's by default or computation */
 165                 case 001:
 166                         reps = REPS_DEF;
 167                         mask = 011;
 168                         break;
 169                 case 002:
 170                         reps = REPS_DEF;
 171                         mask = 012;
 172                         break;
 173                 case 003:
 174                         reps = REPS_DEF;
 175                         mask = 013;
 176                         break;
 177                 case 004:
 178                         reps = REPS_DEF;
 179                         mask = 014;
 180                         break;
 181                 case 005:
 182                         reps = REPS_DEF;
 183                         mask = 015;
 184                         break;
 185                 case 006:
 186                         reps = REPS_DEF;
 187                         mask = 016;
 188                         break;
 189                 case 007:
 190                         if (randomize) {
 191                                 reps = REPS_DEF;
 192                                 mask = 0;
 193                                 break;
 194                         }
 195                         if (s == 0.0) {
 196                                 reps = 0;
 197                                 mask = 0;
 198                                 break;
 199                         }
 200                         reps = (ender - begin + s) / s;
 201                         if (reps <= 0)
 202                                 errx(1, "impossible stepsize");
 203                         mask = 0;
 204                         break;
 205                 case 010:
 206                         begin = BEGIN_DEF;
 207                         mask = 014;
 208                         break;
 209                 case 011:
 210                         begin = BEGIN_DEF;
 211                         mask = 015;
 212                         break;
 213                 case 012:
 214                         s = (randomize ? time(NULL) : STEP_DEF);
 215                         mask = 013;
 216                         break;
 217                 case 013:
 218                         if (randomize)
 219                                 begin = BEGIN_DEF;
 220                         else if (reps == 0)
 221                                 errx(1, "must specify begin if reps == 0");
 222                         begin = ender - reps * s + s;
 223                         mask = 0;
 224                         break;
 225                 case 014:
 226                         s = (randomize ? -1.0 : STEP_DEF);
 227                         mask = 015;
 228                         break;
 229                 case 015:
 230                         if (randomize)
 231                                 ender = ENDER_DEF;
 232                         else
 233                                 ender = begin + reps * s - s;
 234                         mask = 0;
 235                         break;
 236                 case 016:
 237                         if (randomize)
 238                                 s = -1.0;
 239                         else if (reps == 0)
 240                                 errx(1, "infinite sequences cannot be bounded");
 241                         else if (reps == 1)
 242                                 s = 0.0;
 243                         else
 244                                 s = (ender - begin) / (reps - 1);
 245                         mask = 0;
 246                         break;
 247                 case 017:               /* if reps given and implied, */
 248                         if (!randomize && s != 0.0) {
 249                                 long t = (ender - begin + s) / s;
 250                                 if (t <= 0)
 251                                         errx(1, "impossible stepsize");
 252                                 if (t < reps)           /* take lesser */
 253                                         reps = t;
 254                         }
 255                         mask = 0;
 256                         break;
 257                 default:
 258                         errx(1, "bad mask");
 259                 }
 260         if (reps == 0)
 261                 infinity = 1;
 262         if (randomize) {
 263                 *x = (ender - begin) * (ender > begin ? 1 : -1);
 264                 for (*i = 1; *i <= reps || infinity; (*i)++) {
 265                         *y = arc4random() / (double)0xffffffffU;
 266                         if (putdata(*y * *x + begin, reps - *i))
 267                                 errx(1, "range error in conversion");
 268                 }
 269         } else
 270                 for (*i = 1, *x = begin; *i <= reps || infinity; (*i)++, *x += s)
 271                         if (putdata(*x, reps - *i))
 272                                 errx(1, "range error in conversion");
 273         if (!nofinalnl)
 274                 putchar('\n');
 275         exit(0);
 276 }
 277
 278 int
 279 putdata(double x, long notlast)
 280 {
 281
 282         if (boring)
 283                 printf("%s", format);
 284         else if (longdata && nosign) {
 285                 if (x <= (double)ULONG_MAX && x >= (double)0)
 286                         printf(format, (unsigned long)x);
 287                 else
 288                         return (1);
 289         } else if (longdata) {
 290                 if (x <= (double)LONG_MAX && x >= (double)LONG_MIN)
 291                         printf(format, (long)x);
 292                 else
 293                         return (1);
 294         } else if (chardata || (intdata && !nosign)) {
 295                 if (x <= (double)INT_MAX && x >= (double)INT_MIN)
 296                         printf(format, (int)x);
 297                 else
 298                         return (1);
 299         } else if (intdata) {
 300                 if (x <= (double)UINT_MAX && x >= (double)0)
 301                         printf(format, (unsigned int)x);
 302                 else
 303                         return (1);
 304
 305         } else
 306                 printf(format, x);
 307         if (notlast != 0)
 308                 fputs(sepstring, stdout);
 309
 310         return (0);
 311 }
 312
 313 static void
 314 usage(void)
 315 {
 316         fprintf(stderr, "%s\n%s\n",
 317         "usage: jot [-cnr] [-b word] [-w word] [-s string] [-p precision]",
 318         "           [reps [begin [end [s]]]]");
 319         exit(1);
 320 }
 321
 322 int
 323 getprec(char *str)
 324 {
 325         char    *p;
 326         char    *q;
 327
 328         for (p = str; *p; p++)
 329                 if (*p == '.')
 330                         break;
 331         if (!*p)
 332                 return (0);
 333         for (q = ++p; *p; p++)
 334                 if (!isdigit(*p))
 335                         break;
 336         return (p - q);
 337 }
 338
 339 void
 340 getformat(void)
 341 {
 342         char    *p, *p2;
 343         int dot, hash, space, sign, numbers = 0;
 344         size_t sz;
 345
 346         if (boring)                             /* no need to bother */
 347                 return;
 348         for (p = format; *p; p++)               /* look for '%' */
 349                 if (*p == '%' && *(p+1) != '%') /* leave %% alone */
 350                         break;
 351         sz = sizeof(format) - strlen(format) - 1;
 352         if (!*p && !chardata) {
 353                 if (snprintf(p, sz, "%%.%df", prec) >= (int)sz)
 354                         errx(1, "-w word too long");
 355         } else if (!*p && chardata) {
 356                 if (strlcpy(p, "%c", sz) >= sz)
 357                         errx(1, "-w word too long");
 358                 intdata = 1;
 359         } else if (!*(p+1)) {
 360                 if (sz <= 0)
 361                         errx(1, "-w word too long");
 362                 strcat(format, "%");            /* cannot end in single '%' */
 363         } else {
 364                 /*
 365                  * Allow conversion format specifiers of the form
 366                  * %[#][ ][{+,-}][0-9]*[.[0-9]*]? where ? must be one of
 367                  * [l]{d,i,o,u,x} or {f,e,g,E,G,d,o,x,D,O,U,X,c,u}
 368                  */
 369                 p2 = p++;
 370                 dot = hash = space = sign = numbers = 0;
 371                 while (!isalpha(*p)) {
 372                         if (isdigit(*p)) {
 373                                 numbers++;
 374                                 p++;
 375                         } else if ((*p == '#' && !(numbers|dot|sign|space|
 376                             hash++)) ||
 377                             (*p == ' ' && !(numbers|dot|space++)) ||
 378                             ((*p == '+' || *p == '-') && !(numbers|dot|sign++))
 379                             || (*p == '.' && !(dot++)))
 380                                 p++;
 381                         else
 382                                 goto fmt_broken;
 383                 }
 384                 if (*p == 'l') {
 385                         longdata = 1;
 386                         if (*++p == 'l') {
 387                                 if (p[1] != '\0')
 388                                         p++;
 389                                 goto fmt_broken;
 390                         }
 391                 }
 392                 switch (*p) {
 393                 case 'o': case 'u': case 'x': case 'X':
 394                         intdata = nosign = 1;
 395                         break;
 396                 case 'd': case 'i':
 397                         intdata = 1;
 398                         break;
 399                 case 'D':
 400                         if (!longdata) {
 401                                 intdata = 1;
 402                                 break;
 403                         }
 404                 case 'O': case 'U':
 405                         if (!longdata) {
 406                                 intdata = nosign = 1;
 407                                 break;
 408                         }
 409                 case 'c':
 410                         if (!(intdata | longdata)) {
 411                                 chardata = 1;
 412                                 break;
 413                         }
 414                 case 'h': case 'n': case 'p': case 'q': case 's': case 'L':
 415                 case '$': case '*':
 416                         goto fmt_broken;
 417                 case 'f': case 'e': case 'g': case 'E': case 'G':
 418                         if (!longdata)
 419                                 break;
 420                         /* FALLTHROUGH */
 421                 default:
 422 fmt_broken:
 423                         *++p = '\0';
 424                         errx(1, "illegal or unsupported format '%s'", p2);
 425                         /* NOTREACHED */
 426                 }
 427                 while (*++p)
 428                         if (*p == '%' && *(p+1) && *(p+1) != '%')
 429                                 errx(1, "too many conversions");
 430                         else if (*p == '%' && *(p+1) == '%')
 431                                 p++;
 432                         else if (*p == '%' && !*(p+1)) {
 433                                 strcat(format, "%");
 434                                 break;
 435                         }
 436         }
 437 }