1 /* $NetBSD: vis.c,v 1.74 2017/11/27 16:37:21 christos Exp $ */ 2 /* $FreeBSD: head/contrib/libc-vis/vis.c 326307 2017-11-28 01:35:28Z brooks $ */ 3 4 /*- 5 * Copyright (c) 1989, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 /*- 34 * Copyright (c) 1999, 2005 The NetBSD Foundation, Inc. 35 * All rights reserved. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 47 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 48 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 49 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 50 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 51 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 52 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 53 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 54 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 55 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 56 * POSSIBILITY OF SUCH DAMAGE. 57 */ 58 59 #include "namespace.h" 60 #include <sys/types.h> 61 #include <sys/param.h> 62 63 #include <assert.h> 64 #include <vis.h> 65 #include <errno.h> 66 #include <stdlib.h> 67 #include <wchar.h> 68 #include <wctype.h> 69 #include "un-namespace.h" 70 71 #ifdef __weak_alias 72 __weak_alias(strvisx,_strvisx) 73 #endif 74 75 #if !HAVE_VIS || !HAVE_SVIS 76 #include "namespace.h" 77 #include <ctype.h> 78 #include <limits.h> 79 #include <stdio.h> 80 #include <string.h> 81 #include "un-namespace.h" 82 83 /* 84 * The reason for going through the trouble to deal with character encodings 85 * in vis(3), is that we use this to safe encode output of commands. This 86 * safe encoding varies depending on the character set. For example if we 87 * display ps output in French, we don't want to display French characters 88 * as M-foo. 89 */ 90 91 static wchar_t *do_svis(wchar_t *, wint_t, int, wint_t, const wchar_t *); 92 93 #undef BELL 94 #define BELL L'\a' 95 96 #if defined(LC_C_LOCALE) 97 #define iscgraph(c) isgraph_l(c, LC_C_LOCALE) 98 #else 99 /* Keep it simple for now, no locale stuff */ 100 #define iscgraph(c) isgraph(c) 101 #ifdef notyet 102 #include <locale.h> 103 static int 104 iscgraph(int c) { 105 int rv; 106 char *ol; 107 108 ol = setlocale(LC_CTYPE, "C"); 109 rv = isgraph(c); 110 if (ol) 111 setlocale(LC_CTYPE, ol); 112 return rv; 113 } 114 #endif 115 #endif 116 117 #define ISGRAPH(flags, c) \ 118 (((flags) & VIS_NOLOCALE) ? iscgraph(c) : iswgraph(c)) 119 120 #define iswoctal(c) (((u_char)(c)) >= L'0' && ((u_char)(c)) <= L'7') 121 #define iswwhite(c) (c == L' ' || c == L'\t' || c == L'\n') 122 #define iswsafe(c) (c == L'\b' || c == BELL || c == L'\r') 123 #define xtoa(c) L"0123456789abcdef"[c] 124 #define XTOA(c) L"0123456789ABCDEF"[c] 125 126 #define MAXEXTRAS 30 127 128 static const wchar_t char_shell[] = L"'`\";&<>()|{}]\\$!^~"; 129 static const wchar_t char_glob[] = L"*?[#"; 130 131 #if !HAVE_NBTOOL_CONFIG_H 132 #ifndef __NetBSD__ 133 /* 134 * On NetBSD MB_LEN_MAX is currently 32 which does not fit on any integer 135 * integral type and it is probably wrong, since currently the maximum 136 * number of bytes and character needs is 6. Until this is fixed, the 137 * loops below are using sizeof(uint64_t) - 1 instead of MB_LEN_MAX, and 138 * the assertion is commented out. 139 */ 140 #if defined(__FreeBSD__) || defined(__DragonFly__) 141 /* 142 * On FreeBSD and DragonFly, including <sys/systm.h> for CTASSERT only 143 * works in kernel mode. 144 */ 145 #ifndef CTASSERT 146 #define CTASSERT(x) _CTASSERT(x, __LINE__) 147 #define _CTASSERT(x, y) __CTASSERT(x, y) 148 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1] 149 #endif 150 #endif /* __FreeBSD__ || __DragonFly__ */ 151 CTASSERT(MB_LEN_MAX <= sizeof(uint64_t)); 152 #endif /* !__NetBSD__ */ 153 #endif 154 155 /* 156 * This is do_hvis, for HTTP style (RFC 1808) 157 */ 158 static wchar_t * 159 do_hvis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra) 160 { 161 if (iswalnum(c) 162 /* safe */ 163 || c == L'$' || c == L'-' || c == L'_' || c == L'.' || c == L'+' 164 /* extra */ 165 || c == L'!' || c == L'*' || c == L'\'' || c == L'(' || c == L')' 166 || c == L',') 167 dst = do_svis(dst, c, flags, nextc, extra); 168 else { 169 *dst++ = L'%'; 170 *dst++ = xtoa(((unsigned int)c >> 4) & 0xf); 171 *dst++ = xtoa((unsigned int)c & 0xf); 172 } 173 174 return dst; 175 } 176 177 /* 178 * This is do_mvis, for Quoted-Printable MIME (RFC 2045) 179 * NB: No handling of long lines or CRLF. 180 */ 181 static wchar_t * 182 do_mvis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra) 183 { 184 if ((c != L'\n') && 185 /* Space at the end of the line */ 186 ((iswspace(c) && (nextc == L'\r' || nextc == L'\n')) || 187 /* Out of range */ 188 (!iswspace(c) && (c < 33 || (c > 60 && c < 62) || c > 126)) || 189 /* Specific char to be escaped */ 190 wcschr(L"#$@[\\]^`{|}~", c) != NULL)) { 191 *dst++ = L'='; 192 *dst++ = XTOA(((unsigned int)c >> 4) & 0xf); 193 *dst++ = XTOA((unsigned int)c & 0xf); 194 } else 195 dst = do_svis(dst, c, flags, nextc, extra); 196 return dst; 197 } 198 199 /* 200 * Output single byte of multibyte character. 201 */ 202 static wchar_t * 203 do_mbyte(wchar_t *dst, wint_t c, int flags, wint_t nextc, int iswextra) 204 { 205 if (flags & VIS_CSTYLE) { 206 switch (c) { 207 case L'\n': 208 *dst++ = L'\\'; *dst++ = L'n'; 209 return dst; 210 case L'\r': 211 *dst++ = L'\\'; *dst++ = L'r'; 212 return dst; 213 case L'\b': 214 *dst++ = L'\\'; *dst++ = L'b'; 215 return dst; 216 case BELL: 217 *dst++ = L'\\'; *dst++ = L'a'; 218 return dst; 219 case L'\v': 220 *dst++ = L'\\'; *dst++ = L'v'; 221 return dst; 222 case L'\t': 223 *dst++ = L'\\'; *dst++ = L't'; 224 return dst; 225 case L'\f': 226 *dst++ = L'\\'; *dst++ = L'f'; 227 return dst; 228 case L' ': 229 *dst++ = L'\\'; *dst++ = L's'; 230 return dst; 231 case L'\0': 232 *dst++ = L'\\'; *dst++ = L'0'; 233 if (iswoctal(nextc)) { 234 *dst++ = L'0'; 235 *dst++ = L'0'; 236 } 237 return dst; 238 /* We cannot encode these characters in VIS_CSTYLE 239 * because they special meaning */ 240 case L'n': 241 case L'r': 242 case L'b': 243 case L'a': 244 case L'v': 245 case L't': 246 case L'f': 247 case L's': 248 case L'x': 249 case L'0': 250 case L'E': 251 case L'F': 252 case L'M': 253 case L'-': 254 case L'^': 255 case L'$': /* vis(1) -l */ 256 break; 257 default: 258 if (ISGRAPH(flags, c) && !iswoctal(c)) { 259 *dst++ = L'\\'; 260 *dst++ = c; 261 return dst; 262 } 263 } 264 } 265 if (iswextra || ((c & 0177) == L' ') || (flags & VIS_OCTAL)) { 266 *dst++ = L'\\'; 267 *dst++ = (u_char)(((u_int32_t)(u_char)c >> 6) & 03) + L'0'; 268 *dst++ = (u_char)(((u_int32_t)(u_char)c >> 3) & 07) + L'0'; 269 *dst++ = (c & 07) + L'0'; 270 } else { 271 if ((flags & VIS_NOSLASH) == 0) 272 *dst++ = L'\\'; 273 274 if (c & 0200) { 275 c &= 0177; 276 *dst++ = L'M'; 277 } 278 279 if (iswcntrl(c)) { 280 *dst++ = L'^'; 281 if (c == 0177) 282 *dst++ = L'?'; 283 else 284 *dst++ = c + L'@'; 285 } else { 286 *dst++ = L'-'; 287 *dst++ = c; 288 } 289 } 290 291 return dst; 292 } 293 294 /* 295 * This is do_vis, the central code of vis. 296 * dst: Pointer to the destination buffer 297 * c: Character to encode 298 * flags: Flags word 299 * nextc: The character following 'c' 300 * extra: Pointer to the list of extra characters to be 301 * backslash-protected. 302 */ 303 static wchar_t * 304 do_svis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra) 305 { 306 int iswextra, i, shft; 307 uint64_t bmsk, wmsk; 308 309 iswextra = wcschr(extra, c) != NULL; 310 if (((flags & VIS_ALL) == 0) && 311 !iswextra && 312 (ISGRAPH(flags, c) || iswwhite(c) || 313 ((flags & VIS_SAFE) && iswsafe(c)))) { 314 *dst++ = c; 315 return dst; 316 } 317 318 /* See comment in istrsenvisx() output loop, below. */ 319 wmsk = 0; 320 for (i = sizeof(wmsk) - 1; i >= 0; i--) { 321 shft = i * NBBY; 322 bmsk = (uint64_t)0xffLL << shft; 323 wmsk |= bmsk; 324 if ((c & wmsk) || i == 0) 325 dst = do_mbyte(dst, (wint_t)( 326 (uint64_t)(c & bmsk) >> shft), 327 flags, nextc, iswextra); 328 } 329 330 return dst; 331 } 332 333 typedef wchar_t *(*visfun_t)(wchar_t *, wint_t, int, wint_t, const wchar_t *); 334 335 /* 336 * Return the appropriate encoding function depending on the flags given. 337 */ 338 static visfun_t 339 getvisfun(int flags) 340 { 341 if (flags & VIS_HTTPSTYLE) 342 return do_hvis; 343 if (flags & VIS_MIMESTYLE) 344 return do_mvis; 345 return do_svis; 346 } 347 348 /* 349 * Expand list of extra characters to not visually encode. 350 */ 351 static wchar_t * 352 makeextralist(int flags, const char *src) 353 { 354 wchar_t *dst, *d; 355 size_t len; 356 const wchar_t *s; 357 mbstate_t mbstate; 358 359 bzero(&mbstate, sizeof(mbstate)); 360 len = strlen(src); 361 if ((dst = calloc(len + MAXEXTRAS, sizeof(*dst))) == NULL) 362 return NULL; 363 364 if ((flags & VIS_NOLOCALE) || mbsrtowcs(dst, &src, len, &mbstate) == (size_t)-1) { 365 size_t i; 366 for (i = 0; i < len; i++) 367 dst[i] = (wchar_t)(u_char)src[i]; 368 d = dst + len; 369 } else 370 d = dst + wcslen(dst); 371 372 if (flags & VIS_GLOB) 373 for (s = char_glob; *s; *d++ = *s++) 374 continue; 375 376 if (flags & VIS_SHELL) 377 for (s = char_shell; *s; *d++ = *s++) 378 continue; 379 380 if (flags & VIS_SP) *d++ = L' '; 381 if (flags & VIS_TAB) *d++ = L'\t'; 382 if (flags & VIS_NL) *d++ = L'\n'; 383 if (flags & VIS_DQ) *d++ = L'"'; 384 if ((flags & VIS_NOSLASH) == 0) *d++ = L'\\'; 385 *d = L'\0'; 386 387 return dst; 388 } 389 390 /* 391 * istrsenvisx() 392 * The main internal function. 393 * All user-visible functions call this one. 394 */ 395 static int 396 istrsenvisx(char **mbdstp, size_t *dlen, const char *mbsrc, size_t mblength, 397 int flags, const char *mbextra, int *cerr_ptr) 398 { 399 wchar_t *dst, *src, *pdst, *psrc, *start, *extra; 400 size_t len, olen; 401 uint64_t bmsk, wmsk; 402 wint_t c; 403 visfun_t f; 404 int clen = 0, cerr, error = -1, i, shft; 405 char *mbdst, *mdst; 406 ssize_t mbslength, maxolen; 407 mbstate_t mbstate; 408 409 _DIAGASSERT(mbdstp != NULL); 410 _DIAGASSERT(mbsrc != NULL || mblength == 0); 411 _DIAGASSERT(mbextra != NULL); 412 413 mbslength = (ssize_t)mblength; 414 /* 415 * When inputing a single character, must also read in the 416 * next character for nextc, the look-ahead character. 417 */ 418 if (mbslength == 1) 419 mbslength++; 420 421 /* 422 * Input (mbsrc) is a char string considered to be multibyte 423 * characters. The input loop will read this string pulling 424 * one character, possibly multiple bytes, from mbsrc and 425 * converting each to wchar_t in src. 426 * 427 * The vis conversion will be done using the wide char 428 * wchar_t string. 429 * 430 * This will then be converted back to a multibyte string to 431 * return to the caller. 432 */ 433 434 /* Allocate space for the wide char strings */ 435 psrc = pdst = extra = NULL; 436 mdst = NULL; 437 if ((psrc = calloc(mbslength + 1, sizeof(*psrc))) == NULL) 438 return -1; 439 if ((pdst = calloc((16 * mbslength) + 1, sizeof(*pdst))) == NULL) 440 goto out; 441 if (*mbdstp == NULL) { 442 if ((mdst = calloc((16 * mbslength) + 1, sizeof(*mdst))) == NULL) 443 goto out; 444 *mbdstp = mdst; 445 } 446 447 mbdst = *mbdstp; 448 dst = pdst; 449 src = psrc; 450 451 if (flags & VIS_NOLOCALE) { 452 /* Do one byte at a time conversion */ 453 cerr = 1; 454 } else { 455 /* Use caller's multibyte conversion error flag. */ 456 cerr = cerr_ptr ? *cerr_ptr : 0; 457 } 458 459 /* 460 * Input loop. 461 * Handle up to mblength characters (not bytes). We do not 462 * stop at NULs because we may be processing a block of data 463 * that includes NULs. 464 */ 465 bzero(&mbstate, sizeof(mbstate)); 466 while (mbslength > 0) { 467 /* Convert one multibyte character to wchar_t. */ 468 if (!cerr) 469 clen = mbrtowc(src, mbsrc, MB_LEN_MAX, &mbstate); 470 if (cerr || clen < 0) { 471 /* Conversion error, process as a byte instead. */ 472 *src = (wint_t)(u_char)*mbsrc; 473 clen = 1; 474 cerr = 1; 475 } 476 if (clen == 0) { 477 /* 478 * NUL in input gives 0 return value. process 479 * as single NUL byte and keep going. 480 */ 481 clen = 1; 482 } 483 /* Advance buffer character pointer. */ 484 src++; 485 /* Advance input pointer by number of bytes read. */ 486 mbsrc += clen; 487 /* Decrement input byte count. */ 488 mbslength -= clen; 489 } 490 len = src - psrc; 491 src = psrc; 492 493 /* 494 * In the single character input case, we will have actually 495 * processed two characters, c and nextc. Reset len back to 496 * just a single character. 497 */ 498 if (mblength < len) 499 len = mblength; 500 501 /* Convert extra argument to list of characters for this mode. */ 502 extra = makeextralist(flags, mbextra); 503 if (!extra) { 504 if (dlen && *dlen == 0) { 505 errno = ENOSPC; 506 goto out; 507 } 508 *mbdst = '\0'; /* can't create extra, return "" */ 509 error = 0; 510 goto out; 511 } 512 513 /* Look up which processing function to call. */ 514 f = getvisfun(flags); 515 516 /* 517 * Main processing loop. 518 * Call do_Xvis processing function one character at a time 519 * with next character available for look-ahead. 520 */ 521 for (start = dst; len > 0; len--) { 522 c = *src++; 523 dst = (*f)(dst, c, flags, len >= 1 ? *src : L'\0', extra); 524 if (dst == NULL) { 525 errno = ENOSPC; 526 goto out; 527 } 528 } 529 530 /* Terminate the string in the buffer. */ 531 *dst = L'\0'; 532 533 /* 534 * Output loop. 535 * Convert wchar_t string back to multibyte output string. 536 * If we have hit a multi-byte conversion error on input, 537 * output byte-by-byte here. Else use wctomb(). 538 */ 539 len = wcslen(start); 540 maxolen = dlen ? *dlen : (wcslen(start) * MB_LEN_MAX + 1); 541 olen = 0; 542 bzero(&mbstate, sizeof(mbstate)); 543 for (dst = start; len > 0; len--) { 544 if (!cerr) 545 clen = wcrtomb(mbdst, *dst, &mbstate); 546 if (cerr || clen < 0) { 547 /* 548 * Conversion error, process as a byte(s) instead. 549 * Examine each byte and higher-order bytes for 550 * data. E.g., 551 * 0x000000000000a264 -> a2 64 552 * 0x000000001f00a264 -> 1f 00 a2 64 553 */ 554 clen = 0; 555 wmsk = 0; 556 for (i = sizeof(wmsk) - 1; i >= 0; i--) { 557 shft = i * NBBY; 558 bmsk = (uint64_t)0xffLL << shft; 559 wmsk |= bmsk; 560 if ((*dst & wmsk) || i == 0) 561 mbdst[clen++] = (char)( 562 (uint64_t)(*dst & bmsk) >> 563 shft); 564 } 565 cerr = 1; 566 } 567 /* If this character would exceed our output limit, stop. */ 568 if (olen + clen > (size_t)maxolen) 569 break; 570 /* Advance output pointer by number of bytes written. */ 571 mbdst += clen; 572 /* Advance buffer character pointer. */ 573 dst++; 574 /* Incrment output character count. */ 575 olen += clen; 576 } 577 578 /* Terminate the output string. */ 579 *mbdst = '\0'; 580 581 if (flags & VIS_NOLOCALE) { 582 /* Pass conversion error flag out. */ 583 if (cerr_ptr) 584 *cerr_ptr = cerr; 585 } 586 587 free(extra); 588 free(pdst); 589 free(psrc); 590 591 return (int)olen; 592 out: 593 free(extra); 594 free(pdst); 595 free(psrc); 596 free(mdst); 597 return error; 598 } 599 600 static int 601 istrsenvisxl(char **mbdstp, size_t *dlen, const char *mbsrc, 602 int flags, const char *mbextra, int *cerr_ptr) 603 { 604 return istrsenvisx(mbdstp, dlen, mbsrc, 605 mbsrc != NULL ? strlen(mbsrc) : 0, flags, mbextra, cerr_ptr); 606 } 607 608 #endif 609 610 #if !HAVE_SVIS 611 /* 612 * The "svis" variants all take an "extra" arg that is a pointer 613 * to a NUL-terminated list of characters to be encoded, too. 614 * These functions are useful e. g. to encode strings in such a 615 * way so that they are not interpreted by a shell. 616 */ 617 618 char * 619 svis(char *mbdst, int c, int flags, int nextc, const char *mbextra) 620 { 621 char cc[2]; 622 int ret; 623 624 cc[0] = c; 625 cc[1] = nextc; 626 627 ret = istrsenvisx(&mbdst, NULL, cc, 1, flags, mbextra, NULL); 628 if (ret < 0) 629 return NULL; 630 return mbdst + ret; 631 } 632 633 char * 634 snvis(char *mbdst, size_t dlen, int c, int flags, int nextc, const char *mbextra) 635 { 636 char cc[2]; 637 int ret; 638 639 cc[0] = c; 640 cc[1] = nextc; 641 642 ret = istrsenvisx(&mbdst, &dlen, cc, 1, flags, mbextra, NULL); 643 if (ret < 0) 644 return NULL; 645 return mbdst + ret; 646 } 647 648 int 649 strsvis(char *mbdst, const char *mbsrc, int flags, const char *mbextra) 650 { 651 return istrsenvisxl(&mbdst, NULL, mbsrc, flags, mbextra, NULL); 652 } 653 654 int 655 strsnvis(char *mbdst, size_t dlen, const char *mbsrc, int flags, const char *mbextra) 656 { 657 return istrsenvisxl(&mbdst, &dlen, mbsrc, flags, mbextra, NULL); 658 } 659 660 int 661 strsvisx(char *mbdst, const char *mbsrc, size_t len, int flags, const char *mbextra) 662 { 663 return istrsenvisx(&mbdst, NULL, mbsrc, len, flags, mbextra, NULL); 664 } 665 666 int 667 strsnvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags, 668 const char *mbextra) 669 { 670 return istrsenvisx(&mbdst, &dlen, mbsrc, len, flags, mbextra, NULL); 671 } 672 673 int 674 strsenvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags, 675 const char *mbextra, int *cerr_ptr) 676 { 677 return istrsenvisx(&mbdst, &dlen, mbsrc, len, flags, mbextra, cerr_ptr); 678 } 679 #endif 680 681 #if !HAVE_VIS 682 /* 683 * vis - visually encode characters 684 */ 685 char * 686 vis(char *mbdst, int c, int flags, int nextc) 687 { 688 char cc[2]; 689 int ret; 690 691 cc[0] = c; 692 cc[1] = nextc; 693 694 ret = istrsenvisx(&mbdst, NULL, cc, 1, flags, "", NULL); 695 if (ret < 0) 696 return NULL; 697 return mbdst + ret; 698 } 699 700 char * 701 nvis(char *mbdst, size_t dlen, int c, int flags, int nextc) 702 { 703 char cc[2]; 704 int ret; 705 706 cc[0] = c; 707 cc[1] = nextc; 708 709 ret = istrsenvisx(&mbdst, &dlen, cc, 1, flags, "", NULL); 710 if (ret < 0) 711 return NULL; 712 return mbdst + ret; 713 } 714 715 /* 716 * strvis - visually encode characters from src into dst 717 * 718 * Dst must be 4 times the size of src to account for possible 719 * expansion. The length of dst, not including the trailing NULL, 720 * is returned. 721 */ 722 723 int 724 strvis(char *mbdst, const char *mbsrc, int flags) 725 { 726 return istrsenvisxl(&mbdst, NULL, mbsrc, flags, "", NULL); 727 } 728 729 int 730 strnvis(char *dst, const char *src, size_t len, int flag) 731 { 732 return istrsenvisxl(&dst, &len, src, flag, "", NULL); 733 } 734 735 int 736 stravis(char **mbdstp, const char *mbsrc, int flags) 737 { 738 *mbdstp = NULL; 739 return istrsenvisxl(mbdstp, NULL, mbsrc, flags, "", NULL); 740 } 741 742 /* 743 * strvisx - visually encode characters from src into dst 744 * 745 * Dst must be 4 times the size of src to account for possible 746 * expansion. The length of dst, not including the trailing NULL, 747 * is returned. 748 * 749 * Strvisx encodes exactly len characters from src into dst. 750 * This is useful for encoding a block of data. 751 */ 752 753 int 754 strvisx(char *mbdst, const char *mbsrc, size_t len, int flags) 755 { 756 return istrsenvisx(&mbdst, NULL, mbsrc, len, flags, "", NULL); 757 } 758 759 int 760 strnvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags) 761 { 762 return istrsenvisx(&mbdst, &dlen, mbsrc, len, flags, "", NULL); 763 } 764 765 int 766 strenvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags, 767 int *cerr_ptr) 768 { 769 return istrsenvisx(&mbdst, &dlen, mbsrc, len, flags, "", cerr_ptr); 770 } 771 #endif 772