vis.c revision 1.64
1 /* $NetBSD: vis.c,v 1.64 2014/09/26 05:01:44 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1999, 2005 The NetBSD Foundation, Inc. 34 * All rights reserved. 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 45 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 46 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 47 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 48 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 49 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 50 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 51 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 52 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 53 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 54 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 55 * POSSIBILITY OF SUCH DAMAGE. 56 */ 57 58 #include <sys/cdefs.h> 59 #if defined(LIBC_SCCS) && !defined(lint) 60 __RCSID("$NetBSD: vis.c,v 1.64 2014/09/26 05:01:44 christos Exp $"); 61 #endif /* LIBC_SCCS and not lint */ 62 #ifdef __FBSDID 63 __FBSDID("$FreeBSD$"); 64 #define _DIAGASSERT(x) assert(x) 65 #endif 66 67 #include "namespace.h" 68 #include <sys/types.h> 69 #include <sys/param.h> 70 71 #include <assert.h> 72 #include <vis.h> 73 #include <errno.h> 74 #include <stdlib.h> 75 #include <wchar.h> 76 #include <wctype.h> 77 78 #ifdef __weak_alias 79 __weak_alias(strvisx,_strvisx) 80 #endif 81 82 #if !HAVE_VIS || !HAVE_SVIS 83 #include <ctype.h> 84 #include <limits.h> 85 #include <stdio.h> 86 #include <string.h> 87 88 /* 89 * The reason for going through the trouble to deal with character encodings 90 * in vis(3), is that we use this to safe encode output of commands. This 91 * safe encoding varies depending on the character set. For example if we 92 * display ps output in French, we don't want to display French characters 93 * as M-foo. 94 */ 95 96 static wchar_t *do_svis(wchar_t *, wint_t, int, wint_t, const wchar_t *); 97 98 #undef BELL 99 #define BELL L'\a' 100 101 #define iswoctal(c) (((u_char)(c)) >= L'0' && ((u_char)(c)) <= L'7') 102 #define iswwhite(c) (c == L' ' || c == L'\t' || c == L'\n') 103 #define iswsafe(c) (c == L'\b' || c == BELL || c == L'\r') 104 #define xtoa(c) L"0123456789abcdef"[c] 105 #define XTOA(c) L"0123456789ABCDEF"[c] 106 107 #define MAXEXTRAS 30 108 109 static const wchar_t char_shell[] = L"'`\";&<>()|{}]\\$!^~"; 110 static const wchar_t char_glob[] = L"*?[#"; 111 112 #if !HAVE_NBTOOL_CONFIG_H 113 #ifndef __NetBSD__ 114 /* 115 * On NetBSD MB_LEN_MAX is currently 32 which does not fit on any integer 116 * integral type and it is probably wrong, since currently the maximum 117 * number of bytes and character needs is 6. Until this is fixed, the 118 * loops below are using sizeof(uint64_t) - 1 instead of MB_LEN_MAX, and 119 * the assertion is commented out. 120 */ 121 #ifdef __FreeBSD__ 122 /* 123 * On FreeBSD including <sys/systm.h> for CTASSERT only works in kernel 124 * mode. 125 */ 126 #ifndef CTASSERT 127 #define CTASSERT(x) _CTASSERT(x, __LINE__) 128 #define _CTASSERT(x, y) __CTASSERT(x, y) 129 #define __CTASSERT(x, y) typedef char __assert ## y[(x) ? 1 : -1] 130 #endif 131 #endif /* __FreeBSD__ */ 132 CTASSERT(MB_LEN_MAX <= sizeof(uint64_t)); 133 #endif /* !__NetBSD__ */ 134 #endif 135 136 /* 137 * This is do_hvis, for HTTP style (RFC 1808) 138 */ 139 static wchar_t * 140 do_hvis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra) 141 { 142 if (iswalnum(c) 143 /* safe */ 144 || c == L'$' || c == L'-' || c == L'_' || c == L'.' || c == L'+' 145 /* extra */ 146 || c == L'!' || c == L'*' || c == L'\'' || c == L'(' || c == L')' 147 || c == L',') 148 dst = do_svis(dst, c, flags, nextc, extra); 149 else { 150 *dst++ = L'%'; 151 *dst++ = xtoa(((unsigned int)c >> 4) & 0xf); 152 *dst++ = xtoa((unsigned int)c & 0xf); 153 } 154 155 return dst; 156 } 157 158 /* 159 * This is do_mvis, for Quoted-Printable MIME (RFC 2045) 160 * NB: No handling of long lines or CRLF. 161 */ 162 static wchar_t * 163 do_mvis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra) 164 { 165 if ((c != L'\n') && 166 /* Space at the end of the line */ 167 ((iswspace(c) && (nextc == L'\r' || nextc == L'\n')) || 168 /* Out of range */ 169 (!iswspace(c) && (c < 33 || (c > 60 && c < 62) || c > 126)) || 170 /* Specific char to be escaped */ 171 wcschr(L"#$@[\\]^`{|}~", c) != NULL)) { 172 *dst++ = L'='; 173 *dst++ = XTOA(((unsigned int)c >> 4) & 0xf); 174 *dst++ = XTOA((unsigned int)c & 0xf); 175 } else 176 dst = do_svis(dst, c, flags, nextc, extra); 177 return dst; 178 } 179 180 /* 181 * Output single byte of multibyte character. 182 */ 183 static wchar_t * 184 do_mbyte(wchar_t *dst, wint_t c, int flags, wint_t nextc, int iswextra) 185 { 186 if (flags & VIS_CSTYLE) { 187 switch (c) { 188 case L'\n': 189 *dst++ = L'\\'; *dst++ = L'n'; 190 return dst; 191 case L'\r': 192 *dst++ = L'\\'; *dst++ = L'r'; 193 return dst; 194 case L'\b': 195 *dst++ = L'\\'; *dst++ = L'b'; 196 return dst; 197 case BELL: 198 *dst++ = L'\\'; *dst++ = L'a'; 199 return dst; 200 case L'\v': 201 *dst++ = L'\\'; *dst++ = L'v'; 202 return dst; 203 case L'\t': 204 *dst++ = L'\\'; *dst++ = L't'; 205 return dst; 206 case L'\f': 207 *dst++ = L'\\'; *dst++ = L'f'; 208 return dst; 209 case L' ': 210 *dst++ = L'\\'; *dst++ = L's'; 211 return dst; 212 case L'\0': 213 *dst++ = L'\\'; *dst++ = L'0'; 214 if (iswoctal(nextc)) { 215 *dst++ = L'0'; 216 *dst++ = L'0'; 217 } 218 return dst; 219 default: 220 if (iswgraph(c)) { 221 *dst++ = L'\\'; 222 *dst++ = c; 223 return dst; 224 } 225 } 226 } 227 if (iswextra || ((c & 0177) == L' ') || (flags & VIS_OCTAL)) { 228 *dst++ = L'\\'; 229 *dst++ = (u_char)(((u_int32_t)(u_char)c >> 6) & 03) + L'0'; 230 *dst++ = (u_char)(((u_int32_t)(u_char)c >> 3) & 07) + L'0'; 231 *dst++ = (c & 07) + L'0'; 232 } else { 233 if ((flags & VIS_NOSLASH) == 0) 234 *dst++ = L'\\'; 235 236 if (c & 0200) { 237 c &= 0177; 238 *dst++ = L'M'; 239 } 240 241 if (iswcntrl(c)) { 242 *dst++ = L'^'; 243 if (c == 0177) 244 *dst++ = L'?'; 245 else 246 *dst++ = c + L'@'; 247 } else { 248 *dst++ = L'-'; 249 *dst++ = c; 250 } 251 } 252 253 return dst; 254 } 255 256 /* 257 * This is do_vis, the central code of vis. 258 * dst: Pointer to the destination buffer 259 * c: Character to encode 260 * flags: Flags word 261 * nextc: The character following 'c' 262 * extra: Pointer to the list of extra characters to be 263 * backslash-protected. 264 */ 265 static wchar_t * 266 do_svis(wchar_t *dst, wint_t c, int flags, wint_t nextc, const wchar_t *extra) 267 { 268 int iswextra, i, shft; 269 uint64_t bmsk, wmsk; 270 271 iswextra = wcschr(extra, c) != NULL; 272 if (!iswextra && (iswgraph(c) || iswwhite(c) || 273 ((flags & VIS_SAFE) && iswsafe(c)))) { 274 *dst++ = c; 275 return dst; 276 } 277 278 /* See comment in istrsenvisx() output loop, below. */ 279 wmsk = 0; 280 for (i = sizeof(wmsk) - 1; i >= 0; i--) { 281 shft = i * NBBY; 282 bmsk = (uint64_t)0xffLL << shft; 283 wmsk |= bmsk; 284 if ((c & wmsk) || i == 0) 285 dst = do_mbyte(dst, (wint_t)( 286 (uint64_t)(c & bmsk) >> shft), 287 flags, nextc, iswextra); 288 } 289 290 return dst; 291 } 292 293 typedef wchar_t *(*visfun_t)(wchar_t *, wint_t, int, wint_t, const wchar_t *); 294 295 /* 296 * Return the appropriate encoding function depending on the flags given. 297 */ 298 static visfun_t 299 getvisfun(int flags) 300 { 301 if (flags & VIS_HTTPSTYLE) 302 return do_hvis; 303 if (flags & VIS_MIMESTYLE) 304 return do_mvis; 305 return do_svis; 306 } 307 308 /* 309 * Expand list of extra characters to not visually encode. 310 */ 311 static wchar_t * 312 makeextralist(int flags, const char *src) 313 { 314 wchar_t *dst, *d; 315 size_t len; 316 const wchar_t *s; 317 318 len = strlen(src); 319 if ((dst = calloc(len + MAXEXTRAS, sizeof(*dst))) == NULL) 320 return NULL; 321 322 if (mbstowcs(dst, src, len) == (size_t)-1) { 323 size_t i; 324 for (i = 0; i < len; i++) 325 dst[i] = (wchar_t)(u_char)src[i]; 326 d = dst + len; 327 } else 328 d = dst + wcslen(dst); 329 330 if (flags & VIS_GLOB) 331 for (s = char_glob; *s; *d++ = *s++) 332 continue; 333 334 if (flags & VIS_SHELL) 335 for (s = char_shell; *s; *d++ = *s++) 336 continue; 337 338 if (flags & VIS_SP) *d++ = L' '; 339 if (flags & VIS_TAB) *d++ = L'\t'; 340 if (flags & VIS_NL) *d++ = L'\n'; 341 if ((flags & VIS_NOSLASH) == 0) *d++ = L'\\'; 342 *d = L'\0'; 343 344 return dst; 345 } 346 347 /* 348 * istrsenvisx() 349 * The main internal function. 350 * All user-visible functions call this one. 351 */ 352 static int 353 istrsenvisx(char *mbdst, size_t *dlen, const char *mbsrc, size_t mblength, 354 int flags, const char *mbextra, int *cerr_ptr) 355 { 356 wchar_t *dst, *src, *pdst, *psrc, *start, *extra; 357 size_t len, olen; 358 uint64_t bmsk, wmsk; 359 wint_t c; 360 visfun_t f; 361 int clen = 0, cerr = 0, error = -1, i, shft; 362 ssize_t mbslength, maxolen; 363 364 _DIAGASSERT(mbdst != NULL); 365 _DIAGASSERT(mbsrc != NULL || mblength == 0); 366 _DIAGASSERT(mbextra != NULL); 367 368 /* 369 * Input (mbsrc) is a char string considered to be multibyte 370 * characters. The input loop will read this string pulling 371 * one character, possibly multiple bytes, from mbsrc and 372 * converting each to wchar_t in src. 373 * 374 * The vis conversion will be done using the wide char 375 * wchar_t string. 376 * 377 * This will then be converted back to a multibyte string to 378 * return to the caller. 379 */ 380 381 /* Allocate space for the wide char strings */ 382 psrc = pdst = extra = NULL; 383 if ((psrc = calloc(mblength + 1, sizeof(*psrc))) == NULL) 384 return -1; 385 if ((pdst = calloc((4 * mblength) + 1, sizeof(*pdst))) == NULL) 386 goto out; 387 dst = pdst; 388 src = psrc; 389 390 /* Use caller's multibyte conversion error flag. */ 391 if (cerr_ptr) 392 cerr = *cerr_ptr; 393 394 /* 395 * Input loop. 396 * Handle up to mblength characters (not bytes). We do not 397 * stop at NULs because we may be processing a block of data 398 * that includes NULs. 399 */ 400 mbslength = (ssize_t)mblength; 401 /* 402 * When inputing a single character, must also read in the 403 * next character for nextc, the look-ahead character. 404 */ 405 if (mbslength == 1) 406 mbslength++; 407 while (mbslength > 0) { 408 /* Convert one multibyte character to wchar_t. */ 409 if (!cerr) 410 clen = mbtowc(src, mbsrc, MB_LEN_MAX); 411 if (cerr || clen < 0) { 412 /* Conversion error, process as a byte instead. */ 413 *src = (wint_t)(u_char)*mbsrc; 414 clen = 1; 415 cerr = 1; 416 } 417 if (clen == 0) 418 /* 419 * NUL in input gives 0 return value. process 420 * as single NUL byte and keep going. 421 */ 422 clen = 1; 423 /* Advance buffer character pointer. */ 424 src++; 425 /* Advance input pointer by number of bytes read. */ 426 mbsrc += clen; 427 /* Decrement input byte count. */ 428 mbslength -= clen; 429 } 430 len = src - psrc; 431 src = psrc; 432 /* 433 * In the single character input case, we will have actually 434 * processed two characters, c and nextc. Reset len back to 435 * just a single character. 436 */ 437 if (mblength < len) 438 len = mblength; 439 440 /* Convert extra argument to list of characters for this mode. */ 441 extra = makeextralist(flags, mbextra); 442 if (!extra) { 443 if (dlen && *dlen == 0) { 444 errno = ENOSPC; 445 goto out; 446 } 447 *mbdst = '\0'; /* can't create extra, return "" */ 448 error = 0; 449 goto out; 450 } 451 452 /* Look up which processing function to call. */ 453 f = getvisfun(flags); 454 455 /* 456 * Main processing loop. 457 * Call do_Xvis processing function one character at a time 458 * with next character available for look-ahead. 459 */ 460 for (start = dst; len > 0; len--) { 461 c = *src++; 462 dst = (*f)(dst, c, flags, len >= 1 ? *src : L'\0', extra); 463 if (dst == NULL) { 464 errno = ENOSPC; 465 goto out; 466 } 467 } 468 469 /* Terminate the string in the buffer. */ 470 *dst = L'\0'; 471 472 /* 473 * Output loop. 474 * Convert wchar_t string back to multibyte output string. 475 * If we have hit a multi-byte conversion error on input, 476 * output byte-by-byte here. Else use wctomb(). 477 */ 478 len = wcslen(start); 479 maxolen = dlen ? *dlen : (wcslen(start) * MB_LEN_MAX + 1); 480 olen = 0; 481 for (dst = start; len > 0; len--) { 482 if (!cerr) 483 clen = wctomb(mbdst, *dst); 484 if (cerr || clen < 0) { 485 /* 486 * Conversion error, process as a byte(s) instead. 487 * Examine each byte and higher-order bytes for 488 * data. E.g., 489 * 0x000000000000a264 -> a2 64 490 * 0x000000001f00a264 -> 1f 00 a2 64 491 */ 492 clen = 0; 493 wmsk = 0; 494 for (i = sizeof(wmsk) - 1; i >= 0; i--) { 495 shft = i * NBBY; 496 bmsk = (uint64_t)0xffLL << shft; 497 wmsk |= bmsk; 498 if ((*dst & wmsk) || i == 0) 499 mbdst[clen++] = (char)( 500 (uint64_t)(*dst & bmsk) >> 501 shft); 502 } 503 cerr = 1; 504 } 505 /* If this character would exceed our output limit, stop. */ 506 if (olen + clen > (size_t)maxolen) 507 break; 508 /* Advance output pointer by number of bytes written. */ 509 mbdst += clen; 510 /* Advance buffer character pointer. */ 511 dst++; 512 /* Incrment output character count. */ 513 olen += clen; 514 } 515 516 /* Terminate the output string. */ 517 *mbdst = '\0'; 518 519 /* Pass conversion error flag out. */ 520 if (cerr_ptr) 521 *cerr_ptr = cerr; 522 523 free(extra); 524 free(pdst); 525 free(psrc); 526 527 return (int)olen; 528 out: 529 free(extra); 530 free(pdst); 531 free(psrc); 532 return error; 533 } 534 535 static int 536 istrsenvisxl(char *mbdst, size_t *dlen, const char *mbsrc, 537 int flags, const char *mbextra, int *cerr_ptr) 538 { 539 return istrsenvisx(mbdst, dlen, mbsrc, 540 mbsrc != NULL ? strlen(mbsrc) : 0, flags, mbextra, cerr_ptr); 541 } 542 543 #endif 544 545 #if !HAVE_SVIS 546 /* 547 * The "svis" variants all take an "extra" arg that is a pointer 548 * to a NUL-terminated list of characters to be encoded, too. 549 * These functions are useful e. g. to encode strings in such a 550 * way so that they are not interpreted by a shell. 551 */ 552 553 char * 554 svis(char *mbdst, int c, int flags, int nextc, const char *mbextra) 555 { 556 char cc[2]; 557 int ret; 558 559 cc[0] = c; 560 cc[1] = nextc; 561 562 ret = istrsenvisx(mbdst, NULL, cc, 1, flags, mbextra, NULL); 563 if (ret < 0) 564 return NULL; 565 return mbdst + ret; 566 } 567 568 char * 569 snvis(char *mbdst, size_t dlen, int c, int flags, int nextc, const char *mbextra) 570 { 571 char cc[2]; 572 int ret; 573 574 cc[0] = c; 575 cc[1] = nextc; 576 577 ret = istrsenvisx(mbdst, &dlen, cc, 1, flags, mbextra, NULL); 578 if (ret < 0) 579 return NULL; 580 return mbdst + ret; 581 } 582 583 int 584 strsvis(char *mbdst, const char *mbsrc, int flags, const char *mbextra) 585 { 586 return istrsenvisxl(mbdst, NULL, mbsrc, flags, mbextra, NULL); 587 } 588 589 int 590 strsnvis(char *mbdst, size_t dlen, const char *mbsrc, int flags, const char *mbextra) 591 { 592 return istrsenvisxl(mbdst, &dlen, mbsrc, flags, mbextra, NULL); 593 } 594 595 int 596 strsvisx(char *mbdst, const char *mbsrc, size_t len, int flags, const char *mbextra) 597 { 598 return istrsenvisx(mbdst, NULL, mbsrc, len, flags, mbextra, NULL); 599 } 600 601 int 602 strsnvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags, 603 const char *mbextra) 604 { 605 return istrsenvisx(mbdst, &dlen, mbsrc, len, flags, mbextra, NULL); 606 } 607 608 int 609 strsenvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags, 610 const char *mbextra, int *cerr_ptr) 611 { 612 return istrsenvisx(mbdst, &dlen, mbsrc, len, flags, mbextra, cerr_ptr); 613 } 614 #endif 615 616 #if !HAVE_VIS 617 /* 618 * vis - visually encode characters 619 */ 620 char * 621 vis(char *mbdst, int c, int flags, int nextc) 622 { 623 char cc[2]; 624 int ret; 625 626 cc[0] = c; 627 cc[1] = nextc; 628 629 ret = istrsenvisx(mbdst, NULL, cc, 1, flags, "", NULL); 630 if (ret < 0) 631 return NULL; 632 return mbdst + ret; 633 } 634 635 char * 636 nvis(char *mbdst, size_t dlen, int c, int flags, int nextc) 637 { 638 char cc[2]; 639 int ret; 640 641 cc[0] = c; 642 cc[1] = nextc; 643 644 ret = istrsenvisx(mbdst, &dlen, cc, 1, flags, "", NULL); 645 if (ret < 0) 646 return NULL; 647 return mbdst + ret; 648 } 649 650 /* 651 * strvis - visually encode characters from src into dst 652 * 653 * Dst must be 4 times the size of src to account for possible 654 * expansion. The length of dst, not including the trailing NULL, 655 * is returned. 656 */ 657 658 int 659 strvis(char *mbdst, const char *mbsrc, int flags) 660 { 661 return istrsenvisxl(mbdst, NULL, mbsrc, flags, "", NULL); 662 } 663 664 int 665 strnvis(char *mbdst, size_t dlen, const char *mbsrc, int flags) 666 { 667 return istrsenvisxl(mbdst, &dlen, mbsrc, flags, "", NULL); 668 } 669 670 /* 671 * strvisx - visually encode characters from src into dst 672 * 673 * Dst must be 4 times the size of src to account for possible 674 * expansion. The length of dst, not including the trailing NULL, 675 * is returned. 676 * 677 * Strvisx encodes exactly len characters from src into dst. 678 * This is useful for encoding a block of data. 679 */ 680 681 int 682 strvisx(char *mbdst, const char *mbsrc, size_t len, int flags) 683 { 684 return istrsenvisx(mbdst, NULL, mbsrc, len, flags, "", NULL); 685 } 686 687 int 688 strnvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags) 689 { 690 return istrsenvisx(mbdst, &dlen, mbsrc, len, flags, "", NULL); 691 } 692 693 int 694 strenvisx(char *mbdst, size_t dlen, const char *mbsrc, size_t len, int flags, 695 int *cerr_ptr) 696 { 697 return istrsenvisx(mbdst, &dlen, mbsrc, len, flags, "", cerr_ptr); 698 } 699 #endif 700
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