| 1 | /*- |
| 2 | * Copyright (c) 1986, 1988, 1991, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * (c) UNIX System Laboratories, Inc. |
| 5 | * All or some portions of this file are derived from material licensed |
| 6 | * to the University of California by American Telephone and Telegraph |
| 7 | * Co. or Unix System Laboratories, Inc. and are reproduced herein with |
| 8 | * the permission of UNIX System Laboratories, Inc. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 4. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | * |
| 34 | * @(#)subr_prf.c 8.3 (Berkeley) 1/21/94 |
| 35 | */ |
| 36 | |
| 37 | #include <stddef.h> |
| 38 | #include <stdarg.h> |
| 39 | #include "printf.h" |
| 40 | #include "util.h" |
| 41 | #include "string.h" |
| 42 | |
| 43 | typedef uint32_t uintmax_t; |
| 44 | typedef int32_t intmax_t; |
| 45 | |
| 46 | typedef unsigned char u_char; |
| 47 | typedef unsigned int u_int; |
| 48 | typedef unsigned long u_long; |
| 49 | typedef unsigned short u_short; |
| 50 | typedef unsigned long long u_quad_t; |
| 51 | typedef long long quad_t; |
| 52 | |
| 53 | typedef int ssize_t; |
| 54 | |
| 55 | #define NBBY 8 /* number of bits in a byte */ |
| 56 | |
| 57 | char const hex2ascii_data[] = "0123456789abcdefghijklmnopqrstuvwxyz"; |
| 58 | #define hex2ascii(hex) (hex2ascii_data[hex]) |
| 59 | #define toupper(c) ((c) - 0x20 * (((c) >= 'a') && ((c) <= 'z'))) |
| 60 | |
| 61 | /* Max number conversion buffer length: a u_quad_t in base 2, plus NUL byte. */ |
| 62 | #define MAXNBUF (sizeof(intmax_t) * NBBY + 1) |
| 63 | |
| 64 | /* |
| 65 | * Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse |
| 66 | * order; return an optional length and a pointer to the last character |
| 67 | * written in the buffer (i.e., the first character of the string). |
| 68 | * The buffer pointed to by `nbuf' must have length >= MAXNBUF. |
| 69 | */ |
| 70 | static char * |
| 71 | ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper) |
| 72 | { |
| 73 | char *p, c; |
| 74 | |
| 75 | p = nbuf; |
| 76 | *p = '\0'; |
| 77 | do { |
| 78 | c = hex2ascii(num % base); |
| 79 | *++p = upper ? toupper(c) : c; |
| 80 | } while (num /= base); |
| 81 | if (lenp) |
| 82 | *lenp = p - nbuf; |
| 83 | return (p); |
| 84 | } |
| 85 | |
| 86 | /* |
| 87 | * Scaled down version of printf(3). |
| 88 | * |
| 89 | * Two additional formats: |
| 90 | * |
| 91 | * The format %b is supported to decode error registers. |
| 92 | * Its usage is: |
| 93 | * |
| 94 | * printf("reg=%b\n", regval, "*"); |
| 95 | * |
| 96 | * where is the output base expressed as a control character, e.g. |
| 97 | * \10 gives octal; \20 gives hex. Each arg is a sequence of characters, |
| 98 | * the first of which gives the bit number to be inspected (origin 1), and |
| 99 | * the next characters (up to a control character, i.e. a character <= 32), |
| 100 | * give the name of the register. Thus: |
| 101 | * |
| 102 | * kvprintf("reg=%b\n", 3, "\10\2BITTWO\1BITONE\n"); |
| 103 | * |
| 104 | * would produce output: |
| 105 | * |
| 106 | * reg=3 |
| 107 | * |
| 108 | * XXX: %D -- Hexdump, takes pointer and separator string: |
| 109 | * ("%6D", ptr, ":") -> XX:XX:XX:XX:XX:XX |
| 110 | * ("%*D", len, ptr, " " -> XX XX XX XX ... |
| 111 | */ |
| 112 | int |
| 113 | kvsprintf(char const *fmt, void *arg, int radix, va_list ap) |
| 114 | { |
| 115 | #define PCHAR(c) {int cc=(c); *d++ = cc; retval++; } |
| 116 | char nbuf[MAXNBUF]; |
| 117 | char *d; |
| 118 | const char *p, *percent, *q; |
| 119 | u_char *up; |
| 120 | int ch, n; |
| 121 | uintmax_t num; |
| 122 | int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot; |
| 123 | int cflag, hflag, jflag, tflag, zflag; |
| 124 | int dwidth, upper; |
| 125 | char padc; |
| 126 | int stop = 0, retval = 0; |
| 127 | |
| 128 | num = 0; |
| 129 | d = (char *) arg; |
| 130 | |
| 131 | if (fmt == NULL) |
| 132 | fmt = "(fmt null)\n"; |
| 133 | |
| 134 | if (radix < 2 || radix > 36) |
| 135 | radix = 10; |
| 136 | |
| 137 | for (;;) { |
| 138 | padc = ' '; |
| 139 | width = 0; |
| 140 | while ((ch = (u_char)*fmt++) != '%' || stop) { |
| 141 | PCHAR(ch); |
| 142 | if (ch == '\0') |
| 143 | return (retval); |
| 144 | } |
| 145 | percent = fmt - 1; |
| 146 | qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0; |
| 147 | sign = 0; dot = 0; dwidth = 0; upper = 0; |
| 148 | cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0; |
| 149 | reswitch: switch (ch = (u_char)*fmt++) { |
| 150 | case '.': |
| 151 | dot = 1; |
| 152 | goto reswitch; |
| 153 | case '#': |
| 154 | sharpflag = 1; |
| 155 | goto reswitch; |
| 156 | case '+': |
| 157 | sign = 1; |
| 158 | goto reswitch; |
| 159 | case '-': |
| 160 | ladjust = 1; |
| 161 | goto reswitch; |
| 162 | case '%': |
| 163 | PCHAR(ch); |
| 164 | break; |
| 165 | case '*': |
| 166 | if (!dot) { |
| 167 | width = va_arg(ap, int); |
| 168 | if (width < 0) { |
| 169 | ladjust = !ladjust; |
| 170 | width = -width; |
| 171 | } |
| 172 | } else { |
| 173 | dwidth = va_arg(ap, int); |
| 174 | } |
| 175 | goto reswitch; |
| 176 | case '0': |
| 177 | if (!dot) { |
| 178 | padc = '0'; |
| 179 | goto reswitch; |
| 180 | } |
| 181 | case '1': case '2': case '3': case '4': |
| 182 | case '5': case '6': case '7': case '8': case '9': |
| 183 | for (n = 0;; ++fmt) { |
| 184 | n = n * 10 + ch - '0'; |
| 185 | ch = *fmt; |
| 186 | if (ch < '0' || ch > '9') |
| 187 | break; |
| 188 | } |
| 189 | if (dot) |
| 190 | dwidth = n; |
| 191 | else |
| 192 | width = n; |
| 193 | goto reswitch; |
| 194 | case 'b': |
| 195 | num = (u_int)va_arg(ap, int); |
| 196 | p = va_arg(ap, char *); |
| 197 | for (q = ksprintn(nbuf, num, *p++, NULL, 0); *q;) |
| 198 | PCHAR(*q--); |
| 199 | |
| 200 | if (num == 0) |
| 201 | break; |
| 202 | |
| 203 | for (tmp = 0; *p;) { |
| 204 | n = *p++; |
| 205 | if (num & (1 << (n - 1))) { |
| 206 | PCHAR(tmp ? ',' : '<'); |
| 207 | for (; (n = *p) > ' '; ++p) |
| 208 | PCHAR(n); |
| 209 | tmp = 1; |
| 210 | } else |
| 211 | for (; *p > ' '; ++p) |
| 212 | continue; |
| 213 | } |
| 214 | if (tmp) |
| 215 | PCHAR('>'); |
| 216 | break; |
| 217 | case 'c': |
| 218 | PCHAR(va_arg(ap, int)); |
| 219 | break; |
| 220 | case 'D': |
| 221 | up = va_arg(ap, u_char *); |
| 222 | p = va_arg(ap, char *); |
| 223 | if (!width) |
| 224 | width = 16; |
| 225 | while(width--) { |
| 226 | PCHAR(hex2ascii(*up >> 4)); |
| 227 | PCHAR(hex2ascii(*up & 0x0f)); |
| 228 | up++; |
| 229 | if (width) |
| 230 | for (q=p;*q;q++) |
| 231 | PCHAR(*q); |
| 232 | } |
| 233 | break; |
| 234 | case 'd': |
| 235 | case 'i': |
| 236 | base = 10; |
| 237 | sign = 1; |
| 238 | goto handle_sign; |
| 239 | case 'h': |
| 240 | if (hflag) { |
| 241 | hflag = 0; |
| 242 | cflag = 1; |
| 243 | } else |
| 244 | hflag = 1; |
| 245 | goto reswitch; |
| 246 | case 'j': |
| 247 | jflag = 1; |
| 248 | goto reswitch; |
| 249 | case 'l': |
| 250 | if (lflag) { |
| 251 | lflag = 0; |
| 252 | qflag = 1; |
| 253 | } else |
| 254 | lflag = 1; |
| 255 | goto reswitch; |
| 256 | case 'n': |
| 257 | if (jflag) |
| 258 | *(va_arg(ap, intmax_t *)) = retval; |
| 259 | else if (qflag) |
| 260 | *(va_arg(ap, quad_t *)) = retval; |
| 261 | else if (lflag) |
| 262 | *(va_arg(ap, long *)) = retval; |
| 263 | else if (zflag) |
| 264 | *(va_arg(ap, size_t *)) = retval; |
| 265 | else if (hflag) |
| 266 | *(va_arg(ap, short *)) = retval; |
| 267 | else if (cflag) |
| 268 | *(va_arg(ap, char *)) = retval; |
| 269 | else |
| 270 | *(va_arg(ap, int *)) = retval; |
| 271 | break; |
| 272 | case 'o': |
| 273 | base = 8; |
| 274 | goto handle_nosign; |
| 275 | case 'p': |
| 276 | base = 16; |
| 277 | sharpflag = (width == 0); |
| 278 | sign = 0; |
| 279 | num = (uintptr_t)va_arg(ap, void *); |
| 280 | goto number; |
| 281 | case 'q': |
| 282 | qflag = 1; |
| 283 | goto reswitch; |
| 284 | case 'r': |
| 285 | base = radix; |
| 286 | if (sign) |
| 287 | goto handle_sign; |
| 288 | goto handle_nosign; |
| 289 | case 's': |
| 290 | p = va_arg(ap, char *); |
| 291 | if (p == NULL) |
| 292 | p = "(null)"; |
| 293 | if (!dot) |
| 294 | n = strlen (p); |
| 295 | else |
| 296 | for (n = 0; n < dwidth && p[n]; n++) |
| 297 | continue; |
| 298 | |
| 299 | width -= n; |
| 300 | |
| 301 | if (!ladjust && width > 0) |
| 302 | while (width--) |
| 303 | PCHAR(padc); |
| 304 | while (n--) |
| 305 | PCHAR(*p++); |
| 306 | if (ladjust && width > 0) |
| 307 | while (width--) |
| 308 | PCHAR(padc); |
| 309 | break; |
| 310 | case 't': |
| 311 | tflag = 1; |
| 312 | goto reswitch; |
| 313 | case 'u': |
| 314 | base = 10; |
| 315 | goto handle_nosign; |
| 316 | case 'X': |
| 317 | upper = 1; |
| 318 | case 'x': |
| 319 | base = 16; |
| 320 | goto handle_nosign; |
| 321 | case 'y': |
| 322 | base = 16; |
| 323 | sign = 1; |
| 324 | goto handle_sign; |
| 325 | case 'z': |
| 326 | zflag = 1; |
| 327 | goto reswitch; |
| 328 | handle_nosign: |
| 329 | sign = 0; |
| 330 | if (jflag) |
| 331 | num = va_arg(ap, uintmax_t); |
| 332 | else if (qflag) |
| 333 | num = va_arg(ap, u_quad_t); |
| 334 | else if (tflag) |
| 335 | num = va_arg(ap, ptrdiff_t); |
| 336 | else if (lflag) |
| 337 | num = va_arg(ap, u_long); |
| 338 | else if (zflag) |
| 339 | num = va_arg(ap, size_t); |
| 340 | else if (hflag) |
| 341 | num = (u_short)va_arg(ap, int); |
| 342 | else if (cflag) |
| 343 | num = (u_char)va_arg(ap, int); |
| 344 | else |
| 345 | num = va_arg(ap, u_int); |
| 346 | goto number; |
| 347 | handle_sign: |
| 348 | if (jflag) |
| 349 | num = va_arg(ap, intmax_t); |
| 350 | else if (qflag) |
| 351 | num = va_arg(ap, quad_t); |
| 352 | else if (tflag) |
| 353 | num = va_arg(ap, ptrdiff_t); |
| 354 | else if (lflag) |
| 355 | num = va_arg(ap, long); |
| 356 | else if (zflag) |
| 357 | num = va_arg(ap, ssize_t); |
| 358 | else if (hflag) |
| 359 | num = (short)va_arg(ap, int); |
| 360 | else if (cflag) |
| 361 | num = (char)va_arg(ap, int); |
| 362 | else |
| 363 | num = va_arg(ap, int); |
| 364 | number: |
| 365 | if (sign && (intmax_t)num < 0) { |
| 366 | neg = 1; |
| 367 | num = -(intmax_t)num; |
| 368 | } |
| 369 | p = ksprintn(nbuf, num, base, &tmp, upper); |
| 370 | if (sharpflag && num != 0) { |
| 371 | if (base == 8) |
| 372 | tmp++; |
| 373 | else if (base == 16) |
| 374 | tmp += 2; |
| 375 | } |
| 376 | if (neg) |
| 377 | tmp++; |
| 378 | |
| 379 | if (!ladjust && padc != '0' && width |
| 380 | && (width -= tmp) > 0) |
| 381 | while (width--) |
| 382 | PCHAR(padc); |
| 383 | if (neg) |
| 384 | PCHAR('-'); |
| 385 | if (sharpflag && num != 0) { |
| 386 | if (base == 8) { |
| 387 | PCHAR('0'); |
| 388 | } else if (base == 16) { |
| 389 | PCHAR('0'); |
| 390 | PCHAR('x'); |
| 391 | } |
| 392 | } |
| 393 | if (!ladjust && width && (width -= tmp) > 0) |
| 394 | while (width--) |
| 395 | PCHAR(padc); |
| 396 | |
| 397 | while (*p) |
| 398 | PCHAR(*p--); |
| 399 | |
| 400 | if (ladjust && width && (width -= tmp) > 0) |
| 401 | while (width--) |
| 402 | PCHAR(padc); |
| 403 | |
| 404 | break; |
| 405 | default: |
| 406 | while (percent < fmt) |
| 407 | PCHAR(*percent++); |
| 408 | /* |
| 409 | * Since we ignore an formatting argument it is no |
| 410 | * longer safe to obey the remaining formatting |
| 411 | * arguments as the arguments will no longer match |
| 412 | * the format specs. |
| 413 | */ |
| 414 | stop = 1; |
| 415 | break; |
| 416 | } |
| 417 | } |
| 418 | PCHAR(0); |
| 419 | return retval; |
| 420 | #undef PCHAR |
| 421 | } |
| 422 | |
| 423 | int vsprintf(char *dest, const char *fmt, va_list ap) |
| 424 | { |
| 425 | return kvsprintf(fmt, dest, 10, ap); |
| 426 | } |
| 427 | |
| 428 | int |
| 429 | sprintf(char *dest, const char *fmt, ...) |
| 430 | { |
| 431 | /* http://www.pagetable.com/?p=298 */ |
| 432 | int retval; |
| 433 | va_list ap; |
| 434 | |
| 435 | va_start(ap, fmt); |
| 436 | retval = kvsprintf(fmt, dest, 10, ap); |
| 437 | va_end(ap); |
| 438 | return retval; |
| 439 | } |