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. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef lint
  35 static const char copyright[] =
  36 "@(#) Copyright (c) 1993\n\
  37         The Regents of the University of California.  All rights reserved.\n";
  38 #endif /* not lint */
  39
  40 #ifndef lint
  41 #if 0
  42 static char sccsid[] = "@(#)jot.c       8.1 (Berkeley) 6/6/93";
  43 #endif
  44 #endif
  45 #include <sys/cdefs.h>
  46 __RCSID("$FreeBSD: src/usr.bin/jot/jot.c,v 1.24 2002/07/05 15:58:27 mike Exp $");
  47
  48 /*
  49  * jot - print sequential or random data
  50  *
  51  * Author:  John Kunze, Office of Comp. Affairs, UCB
  52  */
  53
  54 #include <ctype.h>
  55 #include <err.h>
  56 #include <limits.h>
  57 #include <stdio.h>
  58 #include <stdint.h>
  59 #include <stdlib.h>
  60 #include <string.h>
  61 #include <time.h>
  62 #include <unistd.h>
  63
  64 #define REPS_DEF        100
  65 #define BEGIN_DEF       1
  66 #define ENDER_DEF       100
  67 #define STEP_DEF        1
  68
  69 #define is_default(s)   (strcmp((s), "-") == 0)
  70
  71 double  begin;
  72 double  ender;
  73 double  s;
  74 long    reps;
  75 int     randomize;
  76 int     infinity;
  77 int     boring;
  78 int     prec;
  79 int     longdata;
  80 int     intdata;
  81 int     chardata;
  82 int     nosign;
  83 int     nofinalnl;
  84 const   char *sepstring = "\n";
  85 char    format[BUFSIZ];
  86
  87 void            getformat(void);
  88 int             getprec(char *);
  89 int             putdata(double, long);
  90 static void     usage(void);
  91
  92 int
  93 main(int argc, char **argv)
  94 {
  95         double  xd, yd;
  96         long    id;
  97         double  *x = &xd;
  98         double  *y = &yd;
  99         long    *i = &id;
 100         unsigned int    mask = 0;
 101         int     n = 0;
 102         int     ch;
 103
 104         while ((ch = getopt(argc, argv, "rb:w:cs:np:")) != -1)
 105                 switch (ch) {
 106                 case 'r':
 107                         randomize = 1;
 108                         break;
 109                 case 'c':
 110                         chardata = 1;
 111                         break;
 112                 case 'n':
 113                         nofinalnl = 1;
 114                         break;
 115                 case 'b':
 116                         boring = 1;
 117                         /* FALLTHROUGH */
 118                 case 'w':
 119                         if (strlcpy(format, optarg, sizeof(format)) >=
 120                             sizeof(format))
 121                                 errx(1, "-%c word too long", ch);
 122                         break;
 123                 case 's':
 124                         sepstring = optarg;
 125                         break;
 126                 case 'p':
 127                         prec = atoi(optarg);
 128                         if (prec <= 0)
 129                                 errx(1, "bad precision value");
 130                         break;
 131                 default:
 132                         usage();
 133                 }
 134         argc -= optind;
 135         argv += optind;
 136
 137         switch (argc) { /* examine args right to left, falling thru cases */
 138         case 4:
 139                 if (!is_default(argv[3])) {
 140                         if (!sscanf(argv[3], "%lf", &s))
 141                                 errx(1, "bad s value: %s", argv[3]);
 142                         mask |= 01;
 143                 }
 144         case 3:
 145                 if (!is_default(argv[2])) {
 146                         if (!sscanf(argv[2], "%lf", &ender))
 147                                 ender = argv[2][strlen(argv[2])-1];
 148                         mask |= 02;
 149                         if (!prec)
 150                                 n = getprec(argv[2]);
 151                 }
 152         case 2:
 153                 if (!is_default(argv[1])) {
 154                         if (!sscanf(argv[1], "%lf", &begin))
 155                                 begin = argv[1][strlen(argv[1])-1];
 156                         mask |= 04;
 157                         if (!prec)
 158                                 prec = getprec(argv[1]);
 159                         if (n > prec)           /* maximum precision */
 160                                 prec = n;
 161                 }
 162         case 1:
 163                 if (!is_default(argv[0])) {
 164                         if (!sscanf(argv[0], "%ld", &reps))
 165                                 errx(1, "bad reps value: %s", argv[0]);
 166                         mask |= 010;
 167                 }
 168                 break;
 169         case 0:
 170                 usage();
 171         default:
 172                 errx(1, "too many arguments.  What do you mean by %s?",
 173                     argv[4]);
 174         }
 175         getformat();
 176         while (mask)    /* 4 bit mask has 1's where last 4 args were given */
 177                 switch (mask) { /* fill in the 0's by default or computation */
 178                 case 001:
 179                         reps = REPS_DEF;
 180                         mask = 011;
 181                         break;
 182                 case 002:
 183                         reps = REPS_DEF;
 184                         mask = 012;
 185                         break;
 186                 case 003:
 187                         reps = REPS_DEF;
 188                         mask = 013;
 189                         break;
 190                 case 004:
 191                         reps = REPS_DEF;
 192                         mask = 014;
 193                         break;
 194                 case 005:
 195                         reps = REPS_DEF;
 196                         mask = 015;
 197                         break;
 198                 case 006:
 199                         reps = REPS_DEF;
 200                         mask = 016;
 201                         break;
 202                 case 007:
 203                         if (randomize) {
 204                                 reps = REPS_DEF;
 205                                 mask = 0;
 206                                 break;
 207                         }
 208                         if (s == 0.0) {
 209                                 reps = 0;
 210                                 mask = 0;
 211                                 break;
 212                         }
 213                         reps = (ender - begin + s) / s;
 214                         if (reps <= 0)
 215                                 errx(1, "impossible stepsize");
 216                         mask = 0;
 217                         break;
 218                 case 010:
 219                         begin = BEGIN_DEF;
 220                         mask = 014;
 221                         break;
 222                 case 011:
 223                         begin = BEGIN_DEF;
 224                         mask = 015;
 225                         break;
 226                 case 012:
 227                         s = (randomize ? time(NULL) : STEP_DEF);
 228                         mask = 013;
 229                         break;
 230                 case 013:
 231                         if (randomize)
 232                                 begin = BEGIN_DEF;
 233                         else if (reps == 0)
 234                                 errx(1, "must specify begin if reps == 0");
 235                         begin = ender - reps * s + s;
 236                         mask = 0;
 237                         break;
 238                 case 014:
 239                         s = (randomize ? -1.0 : STEP_DEF);
 240                         mask = 015;
 241                         break;
 242                 case 015:
 243                         if (randomize)
 244                                 ender = ENDER_DEF;
 245                         else
 246                                 ender = begin + reps * s - s;
 247                         mask = 0;
 248                         break;
 249                 case 016:
 250                         if (randomize)
 251                                 s = -1.0;
 252                         else if (reps == 0)
 253                                 errx(1, "infinite sequences cannot be bounded");
 254                         else if (reps == 1)
 255                                 s = 0.0;
 256                         else
 257                                 s = (ender - begin) / (reps - 1);
 258                         mask = 0;
 259                         break;
 260                 case 017:               /* if reps given and implied, */
 261                         if (!randomize && s != 0.0) {
 262                                 long t = (ender - begin + s) / s;
 263                                 if (t <= 0)
 264                                         errx(1, "impossible stepsize");
 265                                 if (t < reps)           /* take lesser */
 266                                         reps = t;
 267                         }
 268                         mask = 0;
 269                         break;
 270                 default:
 271                         errx(1, "bad mask");
 272                 }
 273         if (reps == 0)
 274                 infinity = 1;
 275         if (randomize) {
 276                 *x = (ender - begin) * (ender > begin ? 1 : -1);
 277                 for (*i = 1; *i <= reps || infinity; (*i)++) {
 278                         *y = arc4random() / (double)UINT32_MAX;
 279                         if (putdata(*y * *x + begin, reps - *i))
 280                                 errx(1, "range error in conversion");
 281                 }
 282         } else
 283                 for (*i = 1, *x = begin; *i <= reps || infinity; (*i)++, *x += s)
 284                         if (putdata(*x, reps - *i))
 285                                 errx(1, "range error in conversion");
 286         if (!nofinalnl)
 287                 putchar('\n');
 288         exit(0);
 289 }
 290
 291 int
 292 putdata(double x, long int notlast)
 293 {
 294
 295         if (boring)
 296                 printf("%s", format);
 297         else if (longdata && nosign) {
 298                 if (x <= (double)ULONG_MAX && x >= (double)0)
 299                         printf(format, (unsigned long)x);
 300                 else
 301                         return (1);
 302         } else if (longdata) {
 303                 if (x <= (double)LONG_MAX && x >= (double)LONG_MIN)
 304                         printf(format, (long)x);
 305                 else
 306                         return (1);
 307         } else if (chardata || (intdata && !nosign)) {
 308                 if (x <= (double)INT_MAX && x >= (double)INT_MIN)
 309                         printf(format, (int)x);
 310                 else
 311                         return (1);
 312         } else if (intdata) {
 313                 if (x <= (double)UINT_MAX && x >= (double)0)
 314                         printf(format, (unsigned int)x);
 315                 else
 316                         return (1);
 317
 318         } else
 319                 printf(format, x);
 320         if (notlast != 0)
 321                 fputs(sepstring, stdout);
 322
 323         return (0);
 324 }
 325
 326 static void
 327 usage(void)
 328 {
 329         fprintf(stderr, "%s\n%s\n",
 330         "usage: jot [-cnr] [-b word] [-w word] [-s string] [-p precision]",
 331         "           [reps [begin [end [s]]]]");
 332         exit(1);
 333 }
 334
 335 int
 336 getprec(char *str)
 337 {
 338         char    *p;
 339         char    *q;
 340
 341         for (p = str; *p; p++)
 342                 if (*p == '.')
 343                         break;
 344         if (!*p)
 345                 return (0);
 346         for (q = ++p; *p; p++)
 347                 if (!isdigit(*p))
 348                         break;
 349         return (p - q);
 350 }
 351
 352 void
 353 getformat(void)
 354 {
 355         char    *p, *p2;
 356         int dot, hash, space, sign, numbers = 0;
 357         size_t sz;
 358
 359         if (boring)                             /* no need to bother */
 360                 return;
 361         for (p = format; *p; p++)               /* look for '%' */
 362                 if (*p == '%' && *(p+1) != '%') /* leave %% alone */
 363                         break;
 364         sz = sizeof(format) - strlen(format) - 1;
 365         if (!*p && !chardata) {
 366                 if (snprintf(p, sz, "%%.%df", prec) >= (int)sz)
 367                         errx(1, "-w word too long");
 368         } else if (!*p && chardata) {
 369                 if (strlcpy(p, "%c", sz) >= sz)
 370                         errx(1, "-w word too long");
 371                 intdata = 1;
 372         } else if (!*(p+1)) {
 373                 if (sz <= 0)
 374                         errx(1, "-w word too long");
 375                 strcat(format, "%");            /* cannot end in single '%' */
 376         } else {
 377                 /*
 378                  * Allow conversion format specifiers of the form
 379                  * %[#][ ][{+,-}][0-9]*[.[0-9]*]? where ? must be one of
 380                  * [l]{d,i,o,u,x} or {f,e,g,E,G,d,o,x,D,O,U,X,c,u}
 381                  */
 382                 p2 = p++;
 383                 dot = hash = space = sign = numbers = 0;
 384                 while (!isalpha(*p)) {
 385                         if (isdigit(*p)) {
 386                                 numbers++;
 387                                 p++;
 388                         } else if ((*p == '#' && !(numbers|dot|sign|space|
 389                             hash++)) ||
 390                             (*p == ' ' && !(numbers|dot|space++)) ||
 391                             ((*p == '+' || *p == '-') && !(numbers|dot|sign++))
 392                             || (*p == '.' && !(dot++)))
 393                                 p++;
 394                         else
 395                                 goto fmt_broken;
 396                 }
 397                 if (*p == 'l') {
 398                         longdata = 1;
 399                         if (*++p == 'l') {
 400                                 if (p[1] != '\0')
 401                                         p++;
 402                                 goto fmt_broken;
 403                         }
 404                 }
 405                 switch (*p) {
 406                 case 'o': case 'u': case 'x': case 'X':
 407                         intdata = nosign = 1;
 408                         break;
 409                 case 'd': case 'i':
 410                         intdata = 1;
 411                         break;
 412                 case 'D':
 413                         if (!longdata) {
 414                                 intdata = 1;
 415                                 break;
 416                         }
 417                 case 'O': case 'U':
 418                         if (!longdata) {
 419                                 intdata = nosign = 1;
 420                                 break;
 421                         }
 422                 case 'c':
 423                         if (!(intdata | longdata)) {
 424                                 chardata = 1;
 425                                 break;
 426                         }
 427                 case 'h': case 'n': case 'p': case 'q': case 's': case 'L':
 428                 case '$': case '*':
 429                         goto fmt_broken;
 430                 case 'f': case 'e': case 'g': case 'E': case 'G':
 431                         if (!longdata)
 432                                 break;
 433                         /* FALLTHROUGH */
 434                 default:
 435 fmt_broken:
 436                         *++p = '\0';
 437                         errx(1, "illegal or unsupported format '%s'", p2);
 438                         /* NOTREACHED */
 439                 }
 440                 while (*++p)
 441                         if (*p == '%' && *(p+1) && *(p+1) != '%')
 442                                 errx(1, "too many conversions");
 443                         else if (*p == '%' && *(p+1) == '%')
 444                                 p++;
 445                         else if (*p == '%' && !*(p+1)) {
 446                                 strcat(format, "%");
 447                                 break;
 448                         }
 449         }
 450 }