projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 176148fb SL |
1 | /* Copyright (c) 1983 Regents of the University of California */ |
| 2 | ||
| 3 | #ifndef lint | |
| e6b27609 | 4 | static char sccsid[] = "@(#)jot.c 4.2 (Berkeley) %G%"; |
| 176148fb SL |
5 | #endif not lint |
| 6 | ||
| 7 | /* | |
| 8 | * jot - print sequential or random data | |
| 9 | * Author: John Kunze, Office of Comp. Affairs, UCB | |
| 10 | */ | |
| 11 | ||
| 12 | #include <stdio.h> | |
| 13 | #include <ctype.h> | |
| 14 | ||
| 15 | #define REPS_DEF 100 | |
| 16 | #define BEGIN_DEF 1 | |
| 17 | #define ENDER_DEF 100 | |
| 18 | #define STEP_DEF 1 | |
| 19 | ||
| 20 | #define isdefault(s) (strcmp((s), "-") == 0) | |
| 21 | #define LARGESTINT (~ (unsigned) 0 >> 1) | |
| 22 | #define CASE break; case | |
| 23 | ||
| 24 | char *sepstring = "\n"; | |
| 25 | char format[BUFSIZ]; | |
| 26 | char buf[BUFSIZ]; | |
| 27 | int randomize; | |
| 28 | int infinity; | |
| 29 | int boring; | |
| 30 | int prec; | |
| 31 | int dox; | |
| 32 | int chardata; | |
| 33 | ||
| 34 | long reps; | |
| 35 | double begin; | |
| 36 | double ender; | |
| 37 | double s; | |
| 38 | ||
| 39 | main(argc, argv) | |
| 40 | int argc; | |
| 41 | char **argv; | |
| 42 | { | |
| 43 | double xd, yd; | |
| 44 | long id; | |
| 45 | register double *x = &xd; | |
| 46 | register double *y = &yd; | |
| 47 | register long *i = &id; | |
| 48 | ||
| 49 | setbuf(stdout, buf); | |
| 50 | getargs(argc, argv); | |
| 51 | if (randomize) { | |
| 52 | *x = (ender - begin) * (ender > begin ? 1 : -1); | |
| 53 | srand((int) s); | |
| 54 | for (*i = 1; *i <= reps || infinity; (*i)++) { | |
| 55 | *y = (double) rand() / LARGESTINT; | |
| 56 | putdata(*y * *x + begin, reps - *i); | |
| 57 | } | |
| 58 | } | |
| 59 | else | |
| 60 | for (*i = 1, *x = begin; *i <= reps || infinity; (*i)++, *x += s) | |
| 61 | putdata(*x, reps - *i); | |
| 62 | putchar('\n'); | |
| 63 | } | |
| 64 | ||
| 65 | getargs(ac, av) | |
| 66 | int ac; | |
| 67 | char **av; | |
| 68 | { | |
| 69 | register unsigned int mask = 0; | |
| 70 | register int n = 0; | |
| 71 | ||
| 72 | while (--ac && **++av == '-' && !isdefault(*av)) | |
| 73 | switch ((*av)[1]) { | |
| 74 | case 'r': | |
| 75 | randomize = 1; | |
| 76 | break; | |
| 77 | case 'c': | |
| 78 | chardata = 1; | |
| 79 | break; | |
| 80 | case 'b': | |
| 81 | boring = 1; | |
| 82 | case 'w': | |
| 83 | if ((*av)[2]) | |
| 84 | strcpy(format, *av + 2); | |
| 85 | else if (!--ac) | |
| 86 | error("Need context word after -w or -b", ""); | |
| 87 | else | |
| 88 | strcpy(format, *++av); | |
| 89 | break; | |
| 90 | case 's': | |
| 91 | if ((*av)[2]) | |
| 92 | strcpy(sepstring, *av + 2); | |
| 93 | else if (!--ac) | |
| 94 | error("Need string after -s", ""); | |
| 95 | else | |
| 96 | strcpy(sepstring, *++av); | |
| 97 | break; | |
| 98 | case 'p': | |
| 99 | if ((*av)[2]) | |
| 100 | prec = atoi(*av + 2); | |
| 101 | else if (!--ac) | |
| 102 | error("Need number after -p", ""); | |
| 103 | else | |
| 104 | prec = atoi(*++av); | |
| 105 | if (prec <= 0) | |
| 106 | error("Bad precision value", ""); | |
| 107 | break; | |
| 108 | default: | |
| 109 | error("Unknown option %s", *av); | |
| 110 | } | |
| 111 | switch (ac) { /* examine args right to left, falling thru cases */ | |
| 112 | case 4: | |
| 113 | if (!isdefault(av[3])) { | |
| 114 | if (!sscanf(av[3], "%F", &s)) | |
| 115 | error("Bad s value: %s", av[3]); | |
| 116 | mask |= 01; | |
| 117 | } | |
| 118 | case 3: | |
| 119 | if (!isdefault(av[2])) { | |
| 120 | if (!sscanf(av[2], "%F", &ender)) | |
| 121 | ender = av[2][strlen(av[2])-1]; | |
| 122 | mask |= 02; | |
| 123 | if (!prec) | |
| 124 | n = getprec(av[2]); | |
| 125 | } | |
| 126 | case 2: | |
| 127 | if (!isdefault(av[1])) { | |
| 128 | if (!sscanf(av[1], "%F", &begin)) | |
| 129 | begin = av[1][strlen(av[1])-1]; | |
| 130 | mask |= 04; | |
| 131 | if (!prec) | |
| 132 | prec = getprec(av[1]); | |
| 133 | if (n > prec) /* maximum precision */ | |
| 134 | prec = n; | |
| 135 | } | |
| 136 | case 1: | |
| 137 | if (!isdefault(av[0])) { | |
| 138 | if (!sscanf(av[0], "%D", &reps)) | |
| 139 | error("Bad reps value: %s", av[0]); | |
| 140 | mask |= 010; | |
| 141 | } | |
| 142 | break; | |
| 143 | case 0: | |
| 144 | error("jot - print sequential or random data", ""); | |
| 145 | default: | |
| 146 | error("Too many arguments. What do you mean by %s?", av[4]); | |
| 147 | } | |
| 148 | getformat(); | |
| 149 | while (mask) /* 4 bit mask has 1's where last 4 args were given */ | |
| 150 | switch (mask) { /* fill in the 0's by default or computation */ | |
| 151 | CASE 001: | |
| 152 | reps = REPS_DEF; | |
| 153 | mask = 011; | |
| 154 | CASE 002: | |
| 155 | reps = REPS_DEF; | |
| 156 | mask = 012; | |
| 157 | CASE 003: | |
| 158 | reps = REPS_DEF; | |
| 159 | mask = 013; | |
| 160 | CASE 004: | |
| 161 | reps = REPS_DEF; | |
| 162 | mask = 014; | |
| 163 | CASE 005: | |
| 164 | reps = REPS_DEF; | |
| 165 | mask = 015; | |
| 166 | CASE 006: | |
| 167 | reps = REPS_DEF; | |
| 168 | mask = 016; | |
| 169 | CASE 007: | |
| 170 | if (randomize) { | |
| 171 | reps = REPS_DEF; | |
| 172 | mask = 0; | |
| 173 | break; | |
| 174 | } | |
| 175 | if (s == 0.0) { | |
| 176 | reps = 0; | |
| 177 | mask = 0; | |
| 178 | break; | |
| 179 | } | |
| 180 | reps = (ender - begin + s) / s; | |
| 181 | if (reps <= 0) | |
| 182 | error("Impossible stepsize", ""); | |
| 183 | mask = 0; | |
| 184 | CASE 010: | |
| 185 | begin = BEGIN_DEF; | |
| 186 | mask = 014; | |
| 187 | CASE 011: | |
| 188 | begin = BEGIN_DEF; | |
| 189 | mask = 015; | |
| 190 | CASE 012: | |
| 191 | s = (randomize ? time(0) : STEP_DEF); | |
| 192 | mask = 013; | |
| 193 | CASE 013: | |
| 194 | if (randomize) | |
| 195 | begin = BEGIN_DEF; | |
| 196 | else if (reps == 0) | |
| 197 | error("Must specify begin if reps == 0", ""); | |
| 198 | begin = ender - reps * s + s; | |
| 199 | mask = 0; | |
| 200 | CASE 014: | |
| 201 | s = (randomize ? time(0) : STEP_DEF); | |
| 202 | mask = 015; | |
| 203 | CASE 015: | |
| 204 | if (randomize) | |
| 205 | ender = ENDER_DEF; | |
| 206 | else | |
| 207 | ender = begin + reps * s - s; | |
| 208 | mask = 0; | |
| 209 | CASE 016: | |
| 210 | if (randomize) | |
| 211 | s = time(0); | |
| 212 | else if (reps == 0) | |
| 213 | error("Infinite sequences cannot be bounded", ""); | |
| 214 | else if (reps == 1) | |
| 215 | s = 0.0; | |
| 216 | else | |
| 217 | s = (ender - begin) / (reps - 1); | |
| 218 | mask = 0; | |
| 219 | CASE 017: | |
| 220 | if (!randomize && s != 0.0) { /* if reps given and implied, */ | |
| 221 | long t = (ender - begin + s) / s; | |
| 222 | if (t <= 0) | |
| 223 | error("Impossible stepsize", ""); | |
| 224 | if (t < reps) /* take lesser */ | |
| 225 | reps = t; | |
| 226 | } | |
| 227 | mask = 0; | |
| 228 | break; | |
| 229 | default: | |
| 230 | error("Bad mask", ""); | |
| 231 | } | |
| 232 | if (reps == 0) | |
| 233 | infinity = 1; | |
| 234 | } | |
| 235 | ||
| 236 | putdata(x, notlast) | |
| 237 | double x; | |
| 238 | long notlast; | |
| 239 | { | |
| 240 | long d = x; | |
| 241 | register char *r; | |
| 242 | register char *e; | |
| 243 | register long *dp = &d; | |
| 244 | ||
| 245 | if (boring) /* repeated word */ | |
| 246 | printf(format); | |
| 247 | else if (dox) /* scalar */ | |
| 248 | printf(format, *dp); | |
| 249 | else /* real */ | |
| 250 | printf(format, x); | |
| 251 | if (notlast != 0) | |
| 252 | fputs(sepstring, stdout); | |
| 253 | } | |
| 254 | ||
| 255 | error(msg, s) | |
| 256 | char *msg; | |
| 257 | char *s; | |
| 258 | { | |
| 259 | char buf[BUFSIZ]; | |
| 260 | ||
| 261 | setbuf(stderr, buf); | |
| 262 | fprintf(stderr, "jot: "); | |
| 263 | fprintf(stderr, msg, s); | |
| 264 | fprintf(stderr, "\nUsage: jot [ options ] [ reps [ begin [ end [ s ] ] ] ]\n"); | |
| 265 | if (strncmp("jot - ", msg, 6) == 0) | |
| 266 | fprintf(stderr, "Options:\n\t%s\t%s\t%s\t%s\t%s", | |
| 267 | "-r random data\n", | |
| 268 | "-c character data\n", | |
| 269 | "-b word repeated word\n", | |
| 270 | "-w word context word\n", | |
| 271 | "-s string data separator\n", | |
| 272 | "-p precision number of characters\n"); | |
| 273 | exit(1); | |
| 274 | } | |
| 275 | ||
| 276 | getprec(s) | |
| 277 | char *s; | |
| 278 | { | |
| 279 | register char *p; | |
| 280 | register char *q; | |
| 281 | ||
| 282 | for (p = s; *p; p++) | |
| 283 | if (*p == '.') | |
| 284 | break; | |
| 285 | if (!*p) | |
| 286 | return(0); | |
| 287 | for (q = ++p; *p; p++) | |
| 288 | if (!isdigit(*p)) | |
| 289 | break; | |
| 290 | return(p - q); | |
| 291 | } | |
| 292 | ||
| 293 | getformat() | |
| 294 | { | |
| 295 | register char *p; | |
| 296 | ||
| 297 | if (boring) /* no need to bother */ | |
| 298 | return; | |
| 299 | for (p = format; *p; p++) /* look for '%' */ | |
| 300 | if (*p == '%' && *(p+1) != '%') /* leave %% alone */ | |
| 301 | break; | |
| 302 | if (!*p && !chardata) | |
| 303 | sprintf(p, "%%.%df", prec); | |
| 304 | else if (!*p && chardata) { | |
| 305 | strcpy(p, "%c"); | |
| 306 | dox = 1; | |
| 307 | } | |
| 308 | else if (!*(p+1)) | |
| 309 | strcat(format, "%"); /* cannot end in single '%' */ | |
| 310 | else { | |
| 311 | while (!isalpha(*p)) | |
| 312 | p++; | |
| 313 | switch (*p) { | |
| 314 | case 'f': case 'e': case 'g': case '%': | |
| 315 | break; | |
| 316 | case 's': | |
| 317 | error("Cannot convert numeric data to strings", ""); | |
| 318 | break; | |
| 319 | /* case 'd': case 'o': case 'x': case 'D': case 'O': case 'X': | |
| 320 | case 'c': case 'u': */ | |
| 321 | default: | |
| 322 | dox = 1; | |
| 323 | break; | |
| 324 | } | |
| 325 | } | |
| 326 | } |