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 "$FreeBSD$"; 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 (havewidth) \ 77 if (haveprec) \ 78 (void)asprintf(&b, f, fieldwidth, precision, func); \ 79 else \ 80 (void)asprintf(&b, f, fieldwidth, func); \ 81 else if (haveprec) \ 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 *, int); 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(int argc, char *argv[]) 107 #else 108 main(int argc, char *argv[]) 109 #endif 110 { 111 static const char *skip1, *skip2; 112 int ch, chopped, end, fieldwidth, haveprec, havewidth, precision, rval; 113 char convch, nextch, *format, *fmt, *start; 114 115 #ifndef BUILTIN 116 (void) setlocale(LC_NUMERIC, ""); 117 #endif 118 while ((ch = getopt(argc, argv, "")) != -1) 119 switch (ch) { 120 case '?': 121 default: 122 usage(); 123 return (1); 124 } 125 argc -= optind; 126 argv += optind; 127 128 if (argc < 1) { 129 usage(); 130 return (1); 131 } 132 133 /* 134 * Basic algorithm is to scan the format string for conversion 135 * specifications -- once one is found, find out if the field 136 * width or precision is a '*'; if it is, gather up value. Note, 137 * format strings are reused as necessary to use up the provided 138 * arguments, arguments of zero/null string are provided to use 139 * up the format string. 140 */ 141 skip1 = "#-+ 0"; 142 skip2 = "0123456789"; 143 144 chopped = escape(fmt = format = *argv, 1);/* backslash interpretation */ 145 rval = 0; 146 gargv = ++argv; 147 for (;;) { 148 end = 0; 149 /* find next format specification */ 150 next: for (start = fmt;; ++fmt) { 151 if (!*fmt) { 152 /* avoid infinite loop */ 153 if (chopped) { 154 (void)printf("%s", start); 155 return (rval); 156 } 157 if (end == 1) { 158 warnx1("missing format character", 159 NULL, NULL); 160 return (1); 161 } 162 end = 1; 163 if (fmt > start) 164 (void)printf("%s", start); 165 if (!*gargv) 166 return (rval); 167 fmt = format; 168 goto next; 169 } 170 /* %% prints a % */ 171 if (*fmt == '%') { 172 if (*++fmt != '%') 173 break; 174 (void)printf("%.*s", (int)(fmt - start), start); 175 fmt++; 176 goto next; 177 } 178 } 179 180 /* skip to field width */ 181 for (; strchr(skip1, *fmt); ++fmt); 182 if (*fmt == '*') { 183 if (getint(&fieldwidth)) 184 return (1); 185 havewidth = 1; 186 ++fmt; 187 } else { 188 havewidth = 0; 189 190 /* skip to possible '.', get following precision */ 191 for (; strchr(skip2, *fmt); ++fmt); 192 } 193 if (*fmt == '.') { 194 /* precision present? */ 195 ++fmt; 196 if (*fmt == '*') { 197 if (getint(&precision)) 198 return (1); 199 haveprec = 1; 200 ++fmt; 201 } else { 202 haveprec = 0; 203 204 /* skip to conversion char */ 205 for (; strchr(skip2, *fmt); ++fmt); 206 } 207 } else 208 haveprec = 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, 0); 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(char *str, int ch) 294 { 295 static char *copy; 296 static size_t copy_size; 297 char *newcopy; 298 size_t len, newlen; 299 300 len = strlen(str) + 2; 301 if (len > copy_size) { 302 newlen = ((len + 1023) >> 10) << 10; 303 #ifdef SHELL 304 if ((newcopy = ckrealloc(copy, newlen)) == NULL) 305 #else 306 if ((newcopy = realloc(copy, newlen)) == NULL) 307 #endif 308 { 309 warnx2("%s", strerror(ENOMEM), NULL); 310 return (NULL); 311 } 312 copy = newcopy; 313 copy_size = newlen; 314 } 315 316 memmove(copy, str, len - 3); 317 copy[len - 3] = 'q'; 318 copy[len - 2] = ch; 319 copy[len - 1] = '\0'; 320 return (copy); 321 } 322 323 static int 324 escape(char *fmt, int percent) 325 { 326 char *store; 327 int value, c; 328 329 for (store = fmt; (c = *fmt); ++fmt, ++store) { 330 if (c != '\\') { 331 *store = c; 332 continue; 333 } 334 switch (*++fmt) { 335 case '\0': /* EOS, user error */ 336 *store = '\\'; 337 *++store = '\0'; 338 return (0); 339 case '\\': /* backslash */ 340 case '\'': /* single quote */ 341 *store = *fmt; 342 break; 343 case 'a': /* bell/alert */ 344 *store = '\7'; 345 break; 346 case 'b': /* backspace */ 347 *store = '\b'; 348 break; 349 case 'c': 350 *store = '\0'; 351 return (1); 352 case 'f': /* form-feed */ 353 *store = '\f'; 354 break; 355 case 'n': /* newline */ 356 *store = '\n'; 357 break; 358 case 'r': /* carriage-return */ 359 *store = '\r'; 360 break; 361 case 't': /* horizontal tab */ 362 *store = '\t'; 363 break; 364 case 'v': /* vertical tab */ 365 *store = '\13'; 366 break; 367 /* octal constant */ 368 case '0': case '1': case '2': case '3': 369 case '4': case '5': case '6': case '7': 370 for (c = *fmt == '0' ? 4 : 3, value = 0; 371 c-- && *fmt >= '0' && *fmt <= '7'; ++fmt) { 372 value <<= 3; 373 value += *fmt - '0'; 374 } 375 --fmt; 376 if (percent && value == '%') { 377 *store++ = '%'; 378 *store = '%'; 379 } else 380 *store = value; 381 break; 382 default: 383 *store = *fmt; 384 break; 385 } 386 } 387 *store = '\0'; 388 return (0); 389 } 390 391 static int 392 getchr(void) 393 { 394 if (!*gargv) 395 return ('\0'); 396 return ((int)**gargv++); 397 } 398 399 static const char * 400 getstr(void) 401 { 402 if (!*gargv) 403 return (""); 404 return (*gargv++); 405 } 406 407 static int 408 getint(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(quad_t *qp, u_quad_t *uqp, int signedconv) 427 { 428 char *ep; 429 int rval; 430 431 if (!*gargv) { 432 *qp = 0; 433 return (0); 434 } 435 if (**gargv == '"' || **gargv == '\'') { 436 if (signedconv) 437 *qp = asciicode(); 438 else 439 *uqp = asciicode(); 440 return (0); 441 } 442 rval = 0; 443 errno = 0; 444 if (signedconv) 445 *qp = strtoq(*gargv, &ep, 0); 446 else 447 *uqp = strtouq(*gargv, &ep, 0); 448 if (ep == *gargv) { 449 warnx2("%s: expected numeric value", *gargv, NULL); 450 rval = 1; 451 } 452 else if (*ep != '\0') { 453 warnx2("%s: not completely converted", *gargv, NULL); 454 rval = 1; 455 } 456 if (errno == ERANGE) { 457 warnx3("%s: %s", *gargv, strerror(ERANGE)); 458 rval = 1; 459 } 460 ++gargv; 461 return (rval); 462 } 463 464 static int 465 getdouble(double *dp) 466 { 467 char *ep; 468 int rval; 469 470 if (!*gargv) 471 return (0); 472 if (**gargv == '"' || **gargv == '\'') { 473 *dp = asciicode(); 474 return (0); 475 } 476 rval = 1; 477 errno = 0; 478 *dp = strtod(*gargv, &ep); 479 if (ep == *gargv) { 480 warnx2("%s: expected numeric value", *gargv, NULL); 481 rval = 1; 482 } else if (*ep != '\0') { 483 warnx2("%s: not completely converted", *gargv, NULL); 484 rval = 1; 485 } 486 if (errno == ERANGE) { 487 warnx3("%s: %s", *gargv, strerror(ERANGE)); 488 rval = 1; 489 } 490 ++gargv; 491 return (rval); 492 } 493 494 static int 495 asciicode(void) 496 { 497 int ch; 498 499 ch = **gargv; 500 if (ch == '\'' || ch == '"') 501 ch = (*gargv)[1]; 502 ++gargv; 503 return (ch); 504 } 505 506 static void 507 usage(void) 508 { 509 (void)fprintf(stderr, "usage: printf format [arg ...]\n"); 510 } 511