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. 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  * @(#) Copyright (c) 1993 The Regents of the University of California.  All rights reserved.
  34  * @(#)jot.c    8.1 (Berkeley) 6/6/93
  35  * $FreeBSD: src/usr.bin/jot/jot.c,v 1.13.2.3 2001/12/17 13:49:50 gallatin Exp $
  36  * $DragonFly: src/usr.bin/jot/jot.c,v 1.4 2004/07/31 10:19:53 eirikn Exp $
  37  */
  38
  39 /*
  40  * jot - print sequential or random data
  41  *
  42  * Author:  John Kunze, Office of Comp. Affairs, UCB
  43  */
  44
  45 #include <ctype.h>
  46 #include <err.h>
  47 #include <limits.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <stdint.h>
  51 #include <string.h>
  52 #include <time.h>
  53 #include <unistd.h>
  54
  55 #define REPS_DEF        100
  56 #define BEGIN_DEF       1
  57 #define ENDER_DEF       100
  58 #define STEP_DEF        1
  59
  60 #define is_default(s)   (strcmp((s), "-") == 0)
  61
  62 double  begin;
  63 double  ender;
  64 double  s;
  65 long    reps;
  66 int     randomize;
  67 int     infinity;
  68 int     boring;
  69 int     prec;
  70 int     longdata;
  71 int     intdata;
  72 int     chardata;
  73 int     nosign;
  74 int     nofinalnl;
  75 const   char *sepstring = "\n";
  76 char    format[BUFSIZ];
  77
  78 void            getformat(void);
  79 int             getprec(char *);
  80 int             putdata(double, long);
  81 static void     usage(void);
  82
  83 int
  84 main(int argc, char **argv)
  85 {
  86         double  xd, yd;
  87         long    id;
  88         double  *x = &xd;
  89         double  *y = &yd;
  90         long    *i = &id;
  91         unsigned int    mask = 0;
  92         int     n = 0;
  93         int     ch;
  94
  95         while ((ch = getopt(argc, argv, "rb:w:cs:np:")) != -1)
  96                 switch ((char)ch) {
  97                 case 'r':
  98                         randomize = 1;
  99                         break;
 100                 case 'c':
 101                         chardata = 1;
 102                         break;
 103                 case 'n':
 104                         nofinalnl = 1;
 105                         break;
 106                 case 'b':
 107                         boring = 1;
 108                         /* FALLTHROUGH */
 109                 case 'w':
 110                         if (strlcpy(format, optarg, sizeof(format)) >=
 111                             sizeof(format))
 112                                 errx(1, "-%c word too long", ch);
 113                         break;
 114                 case 's':
 115                         sepstring = optarg;
 116                         break;
 117                 case 'p':
 118                         prec = atoi(optarg);
 119                         if (prec <= 0)
 120                                 errx(1, "bad precision value");
 121                         break;
 122                 default:
 123                         usage();
 124                 }
 125         argc -= optind;
 126         argv += optind;
 127
 128         switch (argc) { /* examine args right to left, falling thru cases */
 129         case 4:
 130                 if (!is_default(argv[3])) {
 131                         if (!sscanf(argv[3], "%lf", &s))
 132                                 errx(1, "bad s value: %s", argv[3]);
 133                         mask |= 01;
 134                 }
 135         case 3:
 136                 if (!is_default(argv[2])) {
 137                         if (!sscanf(argv[2], "%lf", &ender))
 138                                 ender = argv[2][strlen(argv[2])-1];
 139                         mask |= 02;
 140                         if (!prec)
 141                                 n = getprec(argv[2]);
 142                 }
 143         case 2:
 144                 if (!is_default(argv[1])) {
 145                         if (!sscanf(argv[1], "%lf", &begin))
 146                                 begin = argv[1][strlen(argv[1])-1];
 147                         mask |= 04;
 148                         if (!prec)
 149                                 prec = getprec(argv[1]);
 150                         if (n > prec)           /* maximum precision */
 151                                 prec = n;
 152                 }
 153         case 1:
 154                 if (!is_default(argv[0])) {
 155                         if (!sscanf(argv[0], "%ld", &reps))
 156                                 errx(1, "bad reps value: %s", argv[0]);
 157                         mask |= 010;
 158                 }
 159                 break;
 160         case 0:
 161                 usage();
 162         default:
 163                 errx(1, "too many arguments.  What do you mean by %s?",
 164                     argv[4]);
 165         }
 166         getformat();
 167         while (mask)    /* 4 bit mask has 1's where last 4 args were given */
 168                 switch (mask) { /* fill in the 0's by default or computation */
 169                 case 001:
 170                         reps = REPS_DEF;
 171                         mask = 011;
 172                         break;
 173                 case 002:
 174                         reps = REPS_DEF;
 175                         mask = 012;
 176                         break;
 177                 case 003:
 178                         reps = REPS_DEF;
 179                         mask = 013;
 180                         break;
 181                 case 004:
 182                         reps = REPS_DEF;
 183                         mask = 014;
 184                         break;
 185                 case 005:
 186                         reps = REPS_DEF;
 187                         mask = 015;
 188                         break;
 189                 case 006:
 190                         reps = REPS_DEF;
 191                         mask = 016;
 192                         break;
 193                 case 007:
 194                         if (randomize) {
 195                                 reps = REPS_DEF;
 196                                 mask = 0;
 197                                 break;
 198                         }
 199                         if (s == 0.0) {
 200                                 reps = 0;
 201                                 mask = 0;
 202                                 break;
 203                         }
 204                         reps = (ender - begin + s) / s;
 205                         if (reps <= 0)
 206                                 errx(1, "impossible stepsize");
 207                         mask = 0;
 208                         break;
 209                 case 010:
 210                         begin = BEGIN_DEF;
 211                         mask = 014;
 212                         break;
 213                 case 011:
 214                         begin = BEGIN_DEF;
 215                         mask = 015;
 216                         break;
 217                 case 012:
 218                         s = (randomize ? time(NULL) : STEP_DEF);
 219                         mask = 013;
 220                         break;
 221                 case 013:
 222                         if (randomize)
 223                                 begin = BEGIN_DEF;
 224                         else if (reps == 0)
 225                                 errx(1, "must specify begin if reps == 0");
 226                         begin = ender - reps * s + s;
 227                         mask = 0;
 228                         break;
 229                 case 014:
 230                         s = (randomize ? -1.0 : STEP_DEF);
 231                         mask = 015;
 232                         break;
 233                 case 015:
 234                         if (randomize)
 235                                 ender = ENDER_DEF;
 236                         else
 237                                 ender = begin + reps * s - s;
 238                         mask = 0;
 239                         break;
 240                 case 016:
 241                         if (randomize)
 242                                 s = -1.0;
 243                         else if (reps == 0)
 244                                 errx(1, "infinite sequences cannot be bounded");
 245                         else if (reps == 1)
 246                                 s = 0.0;
 247                         else
 248                                 s = (ender - begin) / (reps - 1);
 249                         mask = 0;
 250                         break;
 251                 case 017:               /* if reps given and implied, */
 252                         if (!randomize && s != 0.0) {
 253                                 long t = (ender - begin + s) / s;
 254                                 if (t <= 0)
 255                                         errx(1, "impossible stepsize");
 256                                 if (t < reps)           /* take lesser */
 257                                         reps = t;
 258                         }
 259                         mask = 0;
 260                         break;
 261                 default:
 262                         errx(1, "bad mask");
 263                 }
 264         if (reps == 0)
 265                 infinity = 1;
 266         if (randomize) {
 267                 *x = (ender - begin) * (ender > begin ? 1 : -1);
 268                 for (*i = 1; *i <= reps || infinity; (*i)++) {
 269                         *y = arc4random() / (double)0xffffffffU;
 270                         if (putdata(*y * *x + begin, reps - *i))
 271                                 errx(1, "range error in conversion");
 272                 }
 273         } else
 274                 for (*i = 1, *x = begin; *i <= reps || infinity; (*i)++, *x += s)
 275                         if (putdata(*x, reps - *i))
 276                                 errx(1, "range error in conversion");
 277         if (!nofinalnl)
 278                 putchar('\n');
 279         exit(0);
 280 }
 281
 282 int
 283 putdata(double x, long notlast)
 284 {
 285
 286         if (boring)
 287                 printf("%s", format);
 288         else if (longdata && nosign) {
 289                 if (x <= (double)ULONG_MAX && x >= (double)0)
 290                         printf(format, (unsigned long)x);
 291                 else
 292                         return (1);
 293         } else if (longdata) {
 294                 if (x <= (double)LONG_MAX && x >= (double)LONG_MIN)
 295                         printf(format, (long)x);
 296                 else
 297                         return (1);
 298         } else if (chardata || (intdata && !nosign)) {
 299                 if (x <= (double)INT_MAX && x >= (double)INT_MIN)
 300                         printf(format, (int)x);
 301                 else
 302                         return (1);
 303         } else if (intdata) {
 304                 if (x <= (double)UINT_MAX && x >= (double)0)
 305                         printf(format, (unsigned int)x);
 306                 else
 307                         return (1);
 308
 309         } else
 310                 printf(format, x);
 311         if (notlast != 0)
 312                 fputs(sepstring, stdout);
 313
 314         return (0);
 315 }
 316
 317 static void
 318 usage(void)
 319 {
 320         fprintf(stderr, "%s\n%s\n",
 321         "usage: jot [-cnr] [-b word] [-w word] [-s string] [-p precision]",
 322         "           [reps [begin [end [s]]]]");
 323         exit(1);
 324 }
 325
 326 int
 327 getprec(char *str)
 328 {
 329         char    *p;
 330         char    *q;
 331
 332         for (p = str; *p; p++)
 333                 if (*p == '.')
 334                         break;
 335         if (!*p)
 336                 return (0);
 337         for (q = ++p; *p; p++)
 338                 if (!isdigit(*p))
 339                         break;
 340         return (p - q);
 341 }
 342
 343 void
 344 getformat(void)
 345 {
 346         char    *p, *p2;
 347         int dot, hash, space, sign, numbers = 0;
 348         size_t sz;
 349
 350         if (boring)                             /* no need to bother */
 351                 return;
 352         for (p = format; *p; p++)               /* look for '%' */
 353                 if (*p == '%' && *(p+1) != '%') /* leave %% alone */
 354                         break;
 355         sz = sizeof(format) - strlen(format) - 1;
 356         if (!*p && !chardata) {
 357                 if (snprintf(p, sz, "%%.%df", prec) >= (int)sz)
 358                         errx(1, "-w word too long");
 359         } else if (!*p && chardata) {
 360                 if (strlcpy(p, "%c", sz) >= sz)
 361                         errx(1, "-w word too long");
 362                 intdata = 1;
 363         } else if (!*(p+1)) {
 364                 if (sz <= 0)
 365                         errx(1, "-w word too long");
 366                 strcat(format, "%");            /* cannot end in single '%' */
 367         } else {
 368                 /*
 369                  * Allow conversion format specifiers of the form
 370                  * %[#][ ][{+,-}][0-9]*[.[0-9]*]? where ? must be one of
 371                  * [l]{d,i,o,u,x} or {f,e,g,E,G,d,o,x,D,O,U,X,c,u}
 372                  */
 373                 p2 = p++;
 374                 dot = hash = space = sign = numbers = 0;
 375                 while (!isalpha(*p)) {
 376                         if (isdigit(*p)) {
 377                                 numbers++;
 378                                 p++;
 379                         } else if ((*p == '#' && !(numbers|dot|sign|space|
 380                             hash++)) ||
 381                             (*p == ' ' && !(numbers|dot|space++)) ||
 382                             ((*p == '+' || *p == '-') && !(numbers|dot|sign++))
 383                             || (*p == '.' && !(dot++)))
 384                                 p++;
 385                         else
 386                                 goto fmt_broken;
 387                 }
 388                 if (*p == 'l') {
 389                         longdata = 1;
 390                         if (*++p == 'l') {
 391                                 if (p[1] != '\0')
 392                                         p++;
 393                                 goto fmt_broken;
 394                         }
 395                 }
 396                 switch (*p) {
 397                 case 'o': case 'u': case 'x': case 'X':
 398                         intdata = nosign = 1;
 399                         break;
 400                 case 'd': case 'i':
 401                         intdata = 1;
 402                         break;
 403                 case 'D':
 404                         if (!longdata) {
 405                                 intdata = 1;
 406                                 break;
 407                         }
 408                 case 'O': case 'U':
 409                         if (!longdata) {
 410                                 intdata = nosign = 1;
 411                                 break;
 412                         }
 413                 case 'c':
 414                         if (!(intdata | longdata)) {
 415                                 chardata = 1;
 416                                 break;
 417                         }
 418                 case 'h': case 'n': case 'p': case 'q': case 's': case 'L':
 419                 case '$': case '*':
 420                         goto fmt_broken;
 421                 case 'f': case 'e': case 'g': case 'E': case 'G':
 422                         if (!longdata)
 423                                 break;
 424                         /* FALLTHROUGH */
 425                 default:
 426 fmt_broken:
 427                         *++p = '\0';
 428                         errx(1, "illegal or unsupported format '%s'", p2);
 429                         /* NOTREACHED */
 430                 }
 431                 while (*++p)
 432                         if (*p == '%' && *(p+1) && *(p+1) != '%')
 433                                 errx(1, "too many conversions");
 434                         else if (*p == '%' && *(p+1) == '%')
 435                                 p++;
 436                         else if (*p == '%' && !*(p+1)) {
 437                                 strcat(format, "%");
 438                                 break;
 439                         }
 440         }
 441 }