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 int     randomize;
  58 int     infinity;
  59 int     boring;
  60 int     prec;
  61 int     longdata;
  62 int     intdata;
  63 int     chardata;
  64 int     nosign;
  65 int     nofinalnl;
  66 static const    char *sepstring = "\n";
  67 static char     format[BUFSIZ];
  68
  69 static void     getformat(void);
  70 static int      getprec(const char *);
  71 static int      putdata(double, long);
  72 static void     usage(void) __dead2;
  73
  74 int
  75 main(int argc, char **argv)
  76 {
  77         double  xd, yd;
  78         long    id;
  79         double  *x = &xd;
  80         double  *y = &yd;
  81         long    *i = &id;
  82         unsigned int    mask = 0;
  83         int     n = 0;
  84         int     ch;
  85         double  begin = BEGIN_DEF;
  86         double  ender = ENDER_DEF;
  87         double  s = STEP_DEF;
  88         long    reps = REPS_DEF;
  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                 /* FALLTHROUGH */
 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                 /* FALLTHROUGH */
 140         case 2:
 141                 if (!is_default(argv[1])) {
 142                         if (!sscanf(argv[1], "%lf", &begin))
 143                                 begin = argv[1][strlen(argv[1])-1];
 144                         mask |= 04;
 145                         if (!prec)
 146                                 prec = getprec(argv[1]);
 147                         if (n > prec)           /* maximum precision */
 148                                 prec = n;
 149                 }
 150                 /* FALLTHROUGH */
 151         case 1:
 152                 if (!is_default(argv[0])) {
 153                         if (!sscanf(argv[0], "%ld", &reps))
 154                                 errx(1, "bad reps value: %s", argv[0]);
 155                         mask |= 010;
 156                 }
 157                 break;
 158         case 0:
 159                 usage();
 160         default:
 161                 errx(1, "too many arguments.  What do you mean by %s?",
 162                     argv[4]);
 163         }
 164         getformat();
 165         while (mask)    /* 4 bit mask has 1's where last 4 args were given */
 166                 switch (mask) { /* fill in the 0's by default or computation */
 167                 case 001:
 168                         reps = REPS_DEF;
 169                         mask = 011;
 170                         break;
 171                 case 002:
 172                         reps = REPS_DEF;
 173                         mask = 012;
 174                         break;
 175                 case 003:
 176                         reps = REPS_DEF;
 177                         mask = 013;
 178                         break;
 179                 case 004:
 180                         reps = REPS_DEF;
 181                         mask = 014;
 182                         break;
 183                 case 005:
 184                         reps = REPS_DEF;
 185                         mask = 015;
 186                         break;
 187                 case 006:
 188                         reps = REPS_DEF;
 189                         mask = 016;
 190                         break;
 191                 case 007:
 192                         if (randomize) {
 193                                 reps = REPS_DEF;
 194                                 mask = 0;
 195                                 break;
 196                         }
 197                         if (s == 0.0) {
 198                                 reps = 0;
 199                                 mask = 0;
 200                                 break;
 201                         }
 202                         reps = (ender - begin + s) / s;
 203                         if (reps <= 0)
 204                                 errx(1, "impossible stepsize");
 205                         mask = 0;
 206                         break;
 207                 case 010:
 208                         begin = BEGIN_DEF;
 209                         mask = 014;
 210                         break;
 211                 case 011:
 212                         begin = BEGIN_DEF;
 213                         mask = 015;
 214                         break;
 215                 case 012:
 216                         s = (randomize ? time(NULL) : STEP_DEF);
 217                         mask = 013;
 218                         break;
 219                 case 013:
 220                         if (randomize)
 221                                 begin = BEGIN_DEF;
 222                         else if (reps == 0)
 223                                 errx(1, "must specify begin if reps == 0");
 224                         begin = ender - reps * s + s;
 225                         mask = 0;
 226                         break;
 227                 case 014:
 228                         s = (randomize ? -1.0 : STEP_DEF);
 229                         mask = 015;
 230                         break;
 231                 case 015:
 232                         if (randomize)
 233                                 ender = ENDER_DEF;
 234                         else
 235                                 ender = begin + reps * s - s;
 236                         mask = 0;
 237                         break;
 238                 case 016:
 239                         if (randomize)
 240                                 s = -1.0;
 241                         else if (reps == 0)
 242                                 errx(1, "infinite sequences cannot be bounded");
 243                         else if (reps == 1)
 244                                 s = 0.0;
 245                         else
 246                                 s = (ender - begin) / (reps - 1);
 247                         mask = 0;
 248                         break;
 249                 case 017:               /* if reps given and implied, */
 250                         if (!randomize && s != 0.0) {
 251                                 long t = (ender - begin + s) / s;
 252                                 if (t <= 0)
 253                                         errx(1, "impossible stepsize");
 254                                 if (t < reps)           /* take lesser */
 255                                         reps = t;
 256                         }
 257                         mask = 0;
 258                         break;
 259                 default:
 260                         errx(1, "bad mask");
 261                 }
 262         if (reps == 0)
 263                 infinity = 1;
 264         if (randomize) {
 265                 *x = (ender - begin) * (ender > begin ? 1 : -1);
 266                 for (*i = 1; *i <= reps || infinity; (*i)++) {
 267                         *y = arc4random() / (double)0xffffffffU;
 268                         if (putdata(*y * *x + begin, reps - *i))
 269                                 errx(1, "range error in conversion");
 270                 }
 271         } else
 272                 for (*i = 1, *x = begin; *i <= reps || infinity; (*i)++, *x += s)
 273                         if (putdata(*x, reps - *i))
 274                                 errx(1, "range error in conversion");
 275         if (!nofinalnl)
 276                 putchar('\n');
 277         exit(0);
 278 }
 279
 280 static int
 281 putdata(double x, long notlast)
 282 {
 283
 284         if (boring)
 285                 printf("%s", format);
 286         else if (longdata && nosign) {
 287                 if (x <= (double)ULONG_MAX && x >= (double)0)
 288                         printf(format, (unsigned long)x);
 289                 else
 290                         return (1);
 291         } else if (longdata) {
 292                 if (x <= (double)LONG_MAX && x >= (double)LONG_MIN)
 293                         printf(format, (long)x);
 294                 else
 295                         return (1);
 296         } else if (chardata || (intdata && !nosign)) {
 297                 if (x <= (double)INT_MAX && x >= (double)INT_MIN)
 298                         printf(format, (int)x);
 299                 else
 300                         return (1);
 301         } else if (intdata) {
 302                 if (x <= (double)UINT_MAX && x >= (double)0)
 303                         printf(format, (unsigned int)x);
 304                 else
 305                         return (1);
 306
 307         } else
 308                 printf(format, x);
 309         if (notlast != 0)
 310                 fputs(sepstring, stdout);
 311
 312         return (0);
 313 }
 314
 315 static void
 316 usage(void)
 317 {
 318         fprintf(stderr, "%s\n%s\n",
 319         "usage: jot [-cnr] [-b word] [-w word] [-s string] [-p precision]",
 320         "           [reps [begin [end [s]]]]");
 321         exit(1);
 322 }
 323
 324 static int
 325 getprec(const char *str)
 326 {
 327         const char      *p;
 328         const char      *q;
 329
 330         for (p = str; *p; p++)
 331                 if (*p == '.')
 332                         break;
 333         if (!*p)
 334                 return (0);
 335         for (q = ++p; *p; p++)
 336                 if (!isdigit(*p))
 337                         break;
 338         return (p - q);
 339 }
 340
 341 static void
 342 getformat(void)
 343 {
 344         char    *p, *p2;
 345         int dot, hash, space, sign, numbers = 0;
 346         size_t sz;
 347
 348         if (boring)                             /* no need to bother */
 349                 return;
 350         for (p = format; *p; p++)               /* look for '%' */
 351                 if (*p == '%' && *(p+1) != '%') /* leave %% alone */
 352                         break;
 353         sz = sizeof(format) - strlen(format) - 1;
 354         if (!*p && !chardata) {
 355                 if (snprintf(p, sz, "%%.%df", prec) >= (int)sz)
 356                         errx(1, "-w word too long");
 357         } else if (!*p && chardata) {
 358                 if (strlcpy(p, "%c", sz) >= sz)
 359                         errx(1, "-w word too long");
 360                 intdata = 1;
 361         } else if (!*(p+1)) {
 362                 if (sz <= 0)
 363                         errx(1, "-w word too long");
 364                 strcat(format, "%");            /* cannot end in single '%' */
 365         } else {
 366                 /*
 367                  * Allow conversion format specifiers of the form
 368                  * %[#][ ][{+,-}][0-9]*[.[0-9]*]? where ? must be one of
 369                  * [l]{d,i,o,u,x} or {f,e,g,E,G,d,o,x,D,O,U,X,c,u}
 370                  */
 371                 p2 = p++;
 372                 dot = hash = space = sign = numbers = 0;
 373                 while (!isalpha(*p)) {
 374                         if (isdigit(*p)) {
 375                                 numbers++;
 376                                 p++;
 377                         } else if ((*p == '#' && !(numbers|dot|sign|space|
 378                             hash++)) ||
 379                             (*p == ' ' && !(numbers|dot|space++)) ||
 380                             ((*p == '+' || *p == '-') && !(numbers|dot|sign++))
 381                             || (*p == '.' && !(dot++)))
 382                                 p++;
 383                         else
 384                                 goto fmt_broken;
 385                 }
 386                 if (*p == 'l') {
 387                         longdata = 1;
 388                         if (*++p == 'l') {
 389                                 if (p[1] != '\0')
 390                                         p++;
 391                                 goto fmt_broken;
 392                         }
 393                 }
 394                 switch (*p) {
 395                 case 'o': case 'u': case 'x': case 'X':
 396                         intdata = nosign = 1;
 397                         break;
 398                 case 'd': case 'i':
 399                         intdata = 1;
 400                         break;
 401                 case 'D':
 402                         if (longdata)
 403                                 goto fmt_broken;
 404                         intdata = 1;
 405                         break;
 406                 case 'O': case 'U':
 407                         if (longdata)
 408                                 goto fmt_broken;
 409                         intdata = nosign = 1;
 410                         break;
 411                 case 'c':
 412                         if (!(intdata | longdata)) {
 413                                 chardata = 1;
 414                                 break;
 415                         }
 416                 case 'h': case 'n': case 'p': case 'q': case 's': case 'L':
 417                 case '$': case '*':
 418                         goto fmt_broken;
 419                 case 'f': case 'e': case 'g': case 'E': case 'G':
 420                         if (!longdata)
 421                                 break;
 422                         /* FALLTHROUGH */
 423                 default:
 424 fmt_broken:
 425                         *++p = '\0';
 426                         errx(1, "illegal or unsupported format '%s'", p2);
 427                         /* NOTREACHED */
 428                 }
 429                 while (*++p)
 430                         if (*p == '%' && *(p+1) && *(p+1) != '%')
 431                                 errx(1, "too many conversions");
 432                         else if (*p == '%' && *(p+1) == '%')
 433                                 p++;
 434                         else if (*p == '%' && !*(p+1)) {
 435                                 strcat(format, "%");
 436                                 break;
 437                         }
 438         }
 439 }