1 /* 2 * Copyright (c) 1989, 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 #if !defined(BUILTIN) && !defined(SHELL) 35 #ifndef lint 36 static char const copyright[] = 37 "@(#) Copyright (c) 1989, 1993\n\ 38 The Regents of the University of California. All rights reserved.\n"; 39 #endif /* not lint */ 40 #endif 41 42 #ifndef lint 43 #if 0 44 static char const sccsid[] = "@(#)printf.c 8.1 (Berkeley) 7/20/93"; 45 #endif 46 static const char rcsid[] = 47 "$FreeBSD: src/usr.bin/printf/printf.c,v 1.12.6.6 2002/04/29 16:45:16 jmallett Exp $"; 48 #endif /* not lint */ 49 50 #include <sys/types.h> 51 52 #include <err.h> 53 #include <errno.h> 54 #include <limits.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <string.h> 58 #include <unistd.h> 59 60 #ifdef SHELL 61 #define main printfcmd 62 #include "bltin/bltin.h" 63 #include "memalloc.h" 64 #else 65 #define warnx1(a, b, c) warnx(a) 66 #define warnx2(a, b, c) warnx(a, b) 67 #define warnx3(a, b, c) warnx(a, b, c) 68 #endif 69 70 #ifndef BUILTIN 71 #include <locale.h> 72 #endif 73 74 #define PF(f, func) do { \ 75 char *b = NULL; \ 76 if (fieldwidth) \ 77 if (precision) \ 78 (void)asprintf(&b, f, fieldwidth, precision, func); \ 79 else \ 80 (void)asprintf(&b, f, fieldwidth, func); \ 81 else if (precision) \ 82 (void)asprintf(&b, f, precision, func); \ 83 else \ 84 (void)asprintf(&b, f, func); \ 85 if (b) { \ 86 (void)fputs(b, stdout); \ 87 free(b); \ 88 } \ 89 } while (0) 90 91 static int asciicode(void); 92 static int escape(char *); 93 static int getchr(void); 94 static int getdouble(double *); 95 static int getint(int *); 96 static int getquads(quad_t *, u_quad_t *, int); 97 static const char 98 *getstr(void); 99 static char *mkquad(char *, int); 100 static void usage(void); 101 102 static char **gargv; 103 104 int 105 #ifdef BUILTIN 106 progprintf(argc, argv) 107 #else 108 main(argc, argv) 109 #endif 110 int argc; 111 char *argv[]; 112 { 113 static const char *skip1, *skip2; 114 int ch, chopped, end, fieldwidth, precision, rval; 115 char convch, nextch, *format, *fmt, *start; 116 117 #ifndef BUILTIN 118 (void) setlocale(LC_NUMERIC, ""); 119 #endif 120 while ((ch = getopt(argc, argv, "")) != -1) 121 switch (ch) { 122 case '?': 123 default: 124 usage(); 125 return (1); 126 } 127 argc -= optind; 128 argv += optind; 129 130 if (argc < 1) { 131 usage(); 132 return (1); 133 } 134 135 /* 136 * Basic algorithm is to scan the format string for conversion 137 * specifications -- once one is found, find out if the field 138 * width or precision is a '*'; if it is, gather up value. Note, 139 * format strings are reused as necessary to use up the provided 140 * arguments, arguments of zero/null string are provided to use 141 * up the format string. 142 */ 143 skip1 = "#-+ 0"; 144 skip2 = "0123456789"; 145 146 chopped = escape(fmt = format = *argv); /* backslash interpretation */ 147 rval = 0; 148 gargv = ++argv; 149 for (;;) { 150 end = 0; 151 /* find next format specification */ 152 next: for (start = fmt;; ++fmt) { 153 if (!*fmt) { 154 /* avoid infinite loop */ 155 if (chopped) { 156 (void)printf("%s", start); 157 return (rval); 158 } 159 if (end == 1) { 160 warnx1("missing format character", 161 NULL, NULL); 162 return (1); 163 } 164 end = 1; 165 if (fmt > start) 166 (void)printf("%s", start); 167 if (!*gargv) 168 return (rval); 169 fmt = format; 170 goto next; 171 } 172 /* %% prints a % */ 173 if (*fmt == '%') { 174 if (*++fmt != '%') 175 break; 176 *fmt++ = '\0'; 177 (void)printf("%s", start); 178 goto next; 179 } 180 } 181 182 /* skip to field width */ 183 for (; strchr(skip1, *fmt); ++fmt); 184 if (*fmt == '*') { 185 if (getint(&fieldwidth)) 186 return (1); 187 ++fmt; 188 } else { 189 fieldwidth = 0; 190 191 /* skip to possible '.', get following precision */ 192 for (; strchr(skip2, *fmt); ++fmt); 193 } 194 if (*fmt == '.') { 195 /* precision present? */ 196 ++fmt; 197 if (*fmt == '*') { 198 if (getint(&precision)) 199 return (1); 200 ++fmt; 201 } else { 202 precision = 0; 203 204 /* skip to conversion char */ 205 for (; strchr(skip2, *fmt); ++fmt); 206 } 207 } else 208 precision = 0; 209 if (!*fmt) { 210 warnx1("missing format character", NULL, NULL); 211 return (1); 212 } 213 214 convch = *fmt; 215 nextch = *++fmt; 216 *fmt = '\0'; 217 switch(convch) { 218 case 'b': { 219 char *p; 220 int getout; 221 222 #ifdef SHELL 223 p = savestr(getstr()); 224 #else 225 p = strdup(getstr()); 226 #endif 227 if (p == NULL) { 228 warnx2("%s", strerror(ENOMEM), NULL); 229 return (1); 230 } 231 getout = escape(p); 232 *(fmt - 1) = 's'; 233 PF(start, p); 234 *(fmt - 1) = 'b'; 235 #ifdef SHELL 236 ckfree(p); 237 #else 238 free(p); 239 #endif 240 if (getout) 241 return (rval); 242 break; 243 } 244 case 'c': { 245 char p; 246 247 p = getchr(); 248 PF(start, p); 249 break; 250 } 251 case 's': { 252 const char *p; 253 254 p = getstr(); 255 PF(start, p); 256 break; 257 } 258 case 'd': case 'i': case 'o': case 'u': case 'x': case 'X': { 259 char *f; 260 quad_t val; 261 u_quad_t uval; 262 int signedconv; 263 264 signedconv = (convch == 'd' || convch == 'i'); 265 if ((f = mkquad(start, convch)) == NULL) 266 return (1); 267 if (getquads(&val, &uval, signedconv)) 268 rval = 1; 269 if (signedconv) 270 PF(f, val); 271 else 272 PF(f, uval); 273 break; 274 } 275 case 'e': case 'E': case 'f': case 'g': case 'G': { 276 double p; 277 278 if (getdouble(&p)) 279 rval = 1; 280 PF(start, p); 281 break; 282 } 283 default: 284 warnx2("illegal format character %c", convch, NULL); 285 return (1); 286 } 287 *fmt = nextch; 288 } 289 /* NOTREACHED */ 290 } 291 292 static char * 293 mkquad(str, ch) 294 char *str; 295 int ch; 296 { 297 static char *copy; 298 static size_t copy_size; 299 char *newcopy; 300 size_t len, newlen; 301 302 len = strlen(str) + 2; 303 if (len > copy_size) { 304 newlen = ((len + 1023) >> 10) << 10; 305 #ifdef SHELL 306 if ((newcopy = ckrealloc(copy, newlen)) == NULL) 307 #else 308 if ((newcopy = realloc(copy, newlen)) == NULL) 309 #endif 310 { 311 warnx2("%s", strerror(ENOMEM), NULL); 312 return (NULL); 313 } 314 copy = newcopy; 315 copy_size = newlen; 316 } 317 318 memmove(copy, str, len - 3); 319 copy[len - 3] = 'q'; 320 copy[len - 2] = ch; 321 copy[len - 1] = '\0'; 322 return (copy); 323 } 324 325 static int 326 escape(fmt) 327 register char *fmt; 328 { 329 register char *store; 330 register int value, c; 331 332 for (store = fmt; (c = *fmt); ++fmt, ++store) { 333 if (c != '\\') { 334 *store = c; 335 continue; 336 } 337 switch (*++fmt) { 338 case '\0': /* EOS, user error */ 339 *store = '\\'; 340 *++store = '\0'; 341 return (0); 342 case '\\': /* backslash */ 343 case '\'': /* single quote */ 344 *store = *fmt; 345 break; 346 case 'a': /* bell/alert */ 347 *store = '\7'; 348 break; 349 case 'b': /* backspace */ 350 *store = '\b'; 351 break; 352 case 'c': 353 *store = '\0'; 354 return (1); 355 case 'f': /* form-feed */ 356 *store = '\f'; 357 break; 358 case 'n': /* newline */ 359 *store = '\n'; 360 break; 361 case 'r': /* carriage-return */ 362 *store = '\r'; 363 break; 364 case 't': /* horizontal tab */ 365 *store = '\t'; 366 break; 367 case 'v': /* vertical tab */ 368 *store = '\13'; 369 break; 370 /* octal constant */ 371 case '0': case '1': case '2': case '3': 372 case '4': case '5': case '6': case '7': 373 for (c = *fmt == '0' ? 4 : 3, value = 0; 374 c-- && *fmt >= '0' && *fmt <= '7'; ++fmt) { 375 value <<= 3; 376 value += *fmt - '0'; 377 } 378 --fmt; 379 *store = value; 380 break; 381 default: 382 *store = *fmt; 383 break; 384 } 385 } 386 *store = '\0'; 387 return (0); 388 } 389 390 static int 391 getchr() 392 { 393 if (!*gargv) 394 return ('\0'); 395 return ((int)**gargv++); 396 } 397 398 static const char * 399 getstr() 400 { 401 if (!*gargv) 402 return (""); 403 return (*gargv++); 404 } 405 406 static int 407 getint(ip) 408 int *ip; 409 { 410 quad_t val; 411 u_quad_t uval; 412 int rval; 413 414 if (getquads(&val, &uval, 1)) 415 return (1); 416 rval = 0; 417 if (val < INT_MIN || val > INT_MAX) { 418 warnx3("%s: %s", *gargv, strerror(ERANGE)); 419 rval = 1; 420 } 421 *ip = (int)val; 422 return (rval); 423 } 424 425 static int 426 getquads(qp, uqp, signedconv) 427 quad_t *qp; 428 u_quad_t *uqp; 429 int signedconv; 430 { 431 char *ep; 432 int rval; 433 434 if (!*gargv) { 435 *qp = 0; 436 return (0); 437 } 438 if (**gargv == '"' || **gargv == '\'') { 439 if (signedconv) 440 *qp = asciicode(); 441 else 442 *uqp = asciicode(); 443 return (0); 444 } 445 rval = 0; 446 errno = 0; 447 if (signedconv) 448 *qp = strtoq(*gargv, &ep, 0); 449 else 450 *uqp = strtouq(*gargv, &ep, 0); 451 if (ep == *gargv) { 452 warnx2("%s: expected numeric value", *gargv, NULL); 453 rval = 1; 454 } 455 else if (*ep != '\0') { 456 warnx2("%s: not completely converted", *gargv, NULL); 457 rval = 1; 458 } 459 if (errno == ERANGE) { 460 warnx3("%s: %s", *gargv, strerror(ERANGE)); 461 rval = 1; 462 } 463 ++gargv; 464 return (rval); 465 } 466 467 static int 468 getdouble(dp) 469 double *dp; 470 { 471 char *ep; 472 int rval; 473 474 if (!*gargv) 475 return (0); 476 if (**gargv == '"' || **gargv == '\'') { 477 *dp = asciicode(); 478 return (0); 479 } 480 rval = 1; 481 errno = 0; 482 *dp = strtod(*gargv, &ep); 483 if (ep == *gargv) { 484 warnx2("%s: expected numeric value", *gargv, NULL); 485 rval = 1; 486 } else if (*ep != '\0') { 487 warnx2("%s: not completely converted", *gargv, NULL); 488 rval = 1; 489 } 490 if (errno == ERANGE) { 491 warnx3("%s: %s", *gargv, strerror(ERANGE)); 492 rval = 1; 493 } 494 ++gargv; 495 return (rval); 496 } 497 498 static int 499 asciicode() 500 { 501 register int ch; 502 503 ch = **gargv; 504 if (ch == '\'' || ch == '"') 505 ch = (*gargv)[1]; 506 ++gargv; 507 return (ch); 508 } 509 510 static void 511 usage() 512 { 513 (void)fprintf(stderr, "usage: printf format [arg ...]\n"); 514 } 515