diff options
Diffstat (limited to 'lib/roken/vis.c')
| -rw-r--r-- | lib/roken/vis.c | 395 |
1 files changed, 241 insertions, 154 deletions
diff --git a/lib/roken/vis.c b/lib/roken/vis.c index 1114223a2974..19ff29d95ca8 100644 --- a/lib/roken/vis.c +++ b/lib/roken/vis.c @@ -1,4 +1,4 @@ -/* $NetBSD: vis.c,v 1.4 2003/08/07 09:15:32 agc Exp $ */ +/* $NetBSD: vis.c,v 1.37 2008/07/25 22:29:23 dsl Exp $ */ /*- * Copyright (c) 1989, 1993 @@ -30,7 +30,8 @@ */ /*- - * Copyright (c) 1999 The NetBSD Foundation, Inc. + * Copyright (c) 1999, 2005 The NetBSD Foundation, Inc. + * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -40,47 +41,35 @@ * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the University of - * California, Berkeley and its contributors. - * 4. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. */ - #if 1 -#ifdef HAVE_CONFIG_H #include <config.h> -RCSID("$Id: vis.c 21005 2007-06-08 01:54:35Z lha $"); -#endif #include "roken.h" #ifndef _DIAGASSERT #define _DIAGASSERT(X) #endif -#else +#else /* heimdal */ #include <sys/cdefs.h> -#if !defined(lint) -__RCSID("$NetBSD: vis.c,v 1.4 2003/08/07 09:15:32 agc Exp $"); -#endif /* not lint */ -#endif +#if defined(LIBC_SCCS) && !defined(lint) +__RCSID("$NetBSD: vis.c,v 1.37 2008/07/25 22:29:23 dsl Exp $"); +#endif /* LIBC_SCCS and not lint */ -#if 0 #include "namespace.h" -#endif +#endif /* heimdal */ + #include <sys/types.h> #include <assert.h> @@ -89,6 +78,7 @@ __RCSID("$NetBSD: vis.c,v 1.4 2003/08/07 09:15:32 agc Exp $"); #include <stdio.h> #include <string.h> #include <vis.h> +#include <stdlib.h> #if 0 #ifdef __weak_alias @@ -101,6 +91,14 @@ __weak_alias(vis,_vis) #endif #endif +#if !HAVE_VIS || !HAVE_SVIS +#include <ctype.h> +#include <limits.h> +#include <stdio.h> +#include <string.h> + +static char *do_svis(char *, int, int, int, const char *); + #undef BELL #if defined(__STDC__) #define BELL '\a' @@ -108,39 +106,64 @@ __weak_alias(vis,_vis) #define BELL '\007' #endif -char ROKEN_LIB_FUNCTION - *rk_vis (char *, int, int, int); -char ROKEN_LIB_FUNCTION - *rk_svis (char *, int, int, int, const char *); -int ROKEN_LIB_FUNCTION +ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL + rk_vis (char *, int, int, int); +ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL + rk_svis (char *, int, int, int, const char *); +ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL rk_strvis (char *, const char *, int); -int ROKEN_LIB_FUNCTION +ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL rk_strsvis (char *, const char *, int, const char *); -int ROKEN_LIB_FUNCTION +ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL rk_strvisx (char *, const char *, size_t, int); -int ROKEN_LIB_FUNCTION +ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL rk_strsvisx (char *, const char *, size_t, int, const char *); #define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7') #define iswhite(c) (c == ' ' || c == '\t' || c == '\n') #define issafe(c) (c == '\b' || c == BELL || c == '\r') +#define xtoa(c) "0123456789abcdef"[c] -#define MAXEXTRAS 5 - +#define MAXEXTRAS 5 -#define MAKEEXTRALIST(flag, extra) \ +#define MAKEEXTRALIST(flag, extra, orig_str) \ do { \ - char *pextra = extra; \ - if (flag & VIS_SP) *pextra++ = ' '; \ - if (flag & VIS_TAB) *pextra++ = '\t'; \ - if (flag & VIS_NL) *pextra++ = '\n'; \ - if ((flag & VIS_NOSLASH) == 0) *pextra++ = '\\'; \ - *pextra = '\0'; \ + const char *orig = orig_str; \ + const char *o = orig; \ + char *e; \ + while (*o++) \ + continue; \ + extra = malloc((size_t)((o - orig) + MAXEXTRAS)); \ + if (!extra) break; \ + for (o = orig, e = extra; (*e++ = *o++) != '\0';) \ + continue; \ + e--; \ + if (flag & VIS_SP) *e++ = ' '; \ + if (flag & VIS_TAB) *e++ = '\t'; \ + if (flag & VIS_NL) *e++ = '\n'; \ + if ((flag & VIS_NOSLASH) == 0) *e++ = '\\'; \ + *e = '\0'; \ } while (/*CONSTCOND*/0) /* - * This is SVIS, the central macro of vis. + * This is do_hvis, for HTTP style (RFC 1808) + */ +static char * +do_hvis(char *dst, int c, int flag, int nextc, const char *extra) +{ + if (!isascii(c) || !isalnum(c) || strchr("$-_.+!*'(),", c) != NULL) { + *dst++ = '%'; + *dst++ = xtoa(((unsigned int)c >> 4) & 0xf); + *dst++ = xtoa((unsigned int)c & 0xf); + } else { + dst = do_svis(dst, c, flag, nextc, extra); + } + return dst; +} + +/* + * This is do_vis, the central code of vis. * dst: Pointer to the destination buffer * c: Character to encode * flag: Flag word @@ -148,90 +171,103 @@ do { \ * extra: Pointer to the list of extra characters to be * backslash-protected. */ -#define SVIS(dst, c, flag, nextc, extra) \ -do { \ - int isextra, isc; \ - isextra = strchr(extra, c) != NULL; \ - if (!isextra && \ - isascii((unsigned char)c) && \ - (isgraph((unsigned char)c) || iswhite(c) || \ - ((flag & VIS_SAFE) && issafe(c)))) { \ - *dst++ = c; \ - break; \ - } \ - isc = 0; \ - if (flag & VIS_CSTYLE) { \ - switch (c) { \ - case '\n': \ - isc = 1; *dst++ = '\\'; *dst++ = 'n'; \ - break; \ - case '\r': \ - isc = 1; *dst++ = '\\'; *dst++ = 'r'; \ - break; \ - case '\b': \ - isc = 1; *dst++ = '\\'; *dst++ = 'b'; \ - break; \ - case BELL: \ - isc = 1; *dst++ = '\\'; *dst++ = 'a'; \ - break; \ - case '\v': \ - isc = 1; *dst++ = '\\'; *dst++ = 'v'; \ - break; \ - case '\t': \ - isc = 1; *dst++ = '\\'; *dst++ = 't'; \ - break; \ - case '\f': \ - isc = 1; *dst++ = '\\'; *dst++ = 'f'; \ - break; \ - case ' ': \ - isc = 1; *dst++ = '\\'; *dst++ = 's'; \ - break; \ - case '\0': \ - isc = 1; *dst++ = '\\'; *dst++ = '0'; \ - if (isoctal(nextc)) { \ - *dst++ = '0'; \ - *dst++ = '0'; \ - } \ - } \ - } \ - if (isc) break; \ - if (isextra || ((c & 0177) == ' ') || (flag & VIS_OCTAL)) { \ - *dst++ = '\\'; \ - *dst++ = (u_char)(((unsigned)(u_char)c >> 6) & 03) + '0'; \ - *dst++ = (u_char)(((unsigned)(u_char)c >> 3) & 07) + '0'; \ - *dst++ = (c & 07) + '0'; \ - } else { \ - if ((flag & VIS_NOSLASH) == 0) *dst++ = '\\'; \ - if (c & 0200) { \ - c &= 0177; *dst++ = 'M'; \ - } \ - if (iscntrl((unsigned char)c)) { \ - *dst++ = '^'; \ - if (c == 0177) \ - *dst++ = '?'; \ - else \ - *dst++ = c + '@'; \ - } else { \ - *dst++ = '-'; *dst++ = c; \ - } \ - } \ -} while (/*CONSTCOND*/0) +static char * +do_svis(char *dst, int c, int flag, int nextc, const char *extra) +{ + int isextra; + isextra = strchr(extra, c) != NULL; + if (!isextra && isascii(c) && (isgraph(c) || iswhite(c) || + ((flag & VIS_SAFE) && issafe(c)))) { + *dst++ = c; + return dst; + } + if (flag & VIS_CSTYLE) { + switch (c) { + case '\n': + *dst++ = '\\'; *dst++ = 'n'; + return dst; + case '\r': + *dst++ = '\\'; *dst++ = 'r'; + return dst; + case '\b': + *dst++ = '\\'; *dst++ = 'b'; + return dst; + case BELL: + *dst++ = '\\'; *dst++ = 'a'; + return dst; + case '\v': + *dst++ = '\\'; *dst++ = 'v'; + return dst; + case '\t': + *dst++ = '\\'; *dst++ = 't'; + return dst; + case '\f': + *dst++ = '\\'; *dst++ = 'f'; + return dst; + case ' ': + *dst++ = '\\'; *dst++ = 's'; + return dst; + case '\0': + *dst++ = '\\'; *dst++ = '0'; + if (isoctal(nextc)) { + *dst++ = '0'; + *dst++ = '0'; + } + return dst; + default: + if (isgraph(c)) { + *dst++ = '\\'; *dst++ = c; + return dst; + } + } + } + if (isextra || ((c & 0177) == ' ') || (flag & VIS_OCTAL)) { + *dst++ = '\\'; + *dst++ = (u_char)(((unsigned int)(u_char)c >> 6) & 03) + '0'; + *dst++ = (u_char)(((unsigned int)(u_char)c >> 3) & 07) + '0'; + *dst++ = (u_char)( c & 07) + '0'; + } else { + if ((flag & VIS_NOSLASH) == 0) *dst++ = '\\'; + if (c & 0200) { + c &= 0177; *dst++ = 'M'; + } + if (iscntrl(c)) { + *dst++ = '^'; + if (c == 0177) + *dst++ = '?'; + else + *dst++ = c + '@'; + } else { + *dst++ = '-'; *dst++ = c; + } + } + return dst; +} /* * svis - visually encode characters, also encoding the characters - * pointed to by `extra' + * pointed to by `extra' */ - -char * ROKEN_LIB_FUNCTION +ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL rk_svis(char *dst, int c, int flag, int nextc, const char *extra) { + char *nextra = NULL; + _DIAGASSERT(dst != NULL); _DIAGASSERT(extra != NULL); - - SVIS(dst, c, flag, nextc, extra); + MAKEEXTRALIST(flag, nextra, extra); + if (!nextra) { + *dst = '\0'; /* can't create nextra, return "" */ + return dst; + } + if (flag & VIS_HTTPSTYLE) + dst = do_hvis(dst, c, flag, nextc, nextra); + else + dst = do_svis(dst, c, flag, nextc, nextra); + free(nextra); *dst = '\0'; - return(dst); + return dst; } @@ -242,94 +278,145 @@ rk_svis(char *dst, int c, int flag, int nextc, const char *extra) * be encoded, too. These functions are useful e. g. to * encode strings in such a way so that they are not interpreted * by a shell. - * + * * Dst must be 4 times the size of src to account for possible * expansion. The length of dst, not including the trailing NULL, - * is returned. + * is returned. * * Strsvisx encodes exactly len bytes from src into dst. * This is useful for encoding a block of data. */ -int ROKEN_LIB_FUNCTION -rk_strsvis(char *dst, const char *src, int flag, const char *extra) +ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL +rk_strsvis(char *dst, const char *csrc, int flag, const char *extra) { - char c; + int c; char *start; + char *nextra = NULL; + const unsigned char *src = (const unsigned char *)csrc; _DIAGASSERT(dst != NULL); _DIAGASSERT(src != NULL); _DIAGASSERT(extra != NULL); - - for (start = dst; (c = *src++) != '\0'; /* empty */) - SVIS(dst, c, flag, *src, extra); + MAKEEXTRALIST(flag, nextra, extra); + if (!nextra) { + *dst = '\0'; /* can't create nextra, return "" */ + return 0; + } + if (flag & VIS_HTTPSTYLE) { + for (start = dst; (c = *src++) != '\0'; /* empty */) + dst = do_hvis(dst, c, flag, *src, nextra); + } else { + for (start = dst; (c = *src++) != '\0'; /* empty */) + dst = do_svis(dst, c, flag, *src, nextra); + } + free(nextra); *dst = '\0'; return (dst - start); } -int ROKEN_LIB_FUNCTION -rk_strsvisx(char *dst, const char *src, size_t len, int flag, const char *extra) +ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL +rk_strsvisx(char *dst, const char *csrc, size_t len, int flag, const char *extra) { - char c; + unsigned char c; char *start; + char *nextra = NULL; + const unsigned char *src = (const unsigned char *)csrc; _DIAGASSERT(dst != NULL); _DIAGASSERT(src != NULL); _DIAGASSERT(extra != NULL); + MAKEEXTRALIST(flag, nextra, extra); + if (! nextra) { + *dst = '\0'; /* can't create nextra, return "" */ + return 0; + } - for (start = dst; len > 0; len--) { - c = *src++; - SVIS(dst, c, flag, len ? *src : '\0', extra); + if (flag & VIS_HTTPSTYLE) { + for (start = dst; len > 0; len--) { + c = *src++; + dst = do_hvis(dst, c, flag, len ? *src : '\0', nextra); + } + } else { + for (start = dst; len > 0; len--) { + c = *src++; + dst = do_svis(dst, c, flag, len ? *src : '\0', nextra); + } } + free(nextra); *dst = '\0'; return (dst - start); } +#endif - +#if !HAVE_VIS /* * vis - visually encode characters */ -char * ROKEN_LIB_FUNCTION +ROKEN_LIB_FUNCTION char * ROKEN_LIB_CALL rk_vis(char *dst, int c, int flag, int nextc) { - char extra[MAXEXTRAS]; + char *extra = NULL; + unsigned char uc = (unsigned char)c; _DIAGASSERT(dst != NULL); - MAKEEXTRALIST(flag, extra); - SVIS(dst, c, flag, nextc, extra); + MAKEEXTRALIST(flag, extra, ""); + if (! extra) { + *dst = '\0'; /* can't create extra, return "" */ + return dst; + } + if (flag & VIS_HTTPSTYLE) + dst = do_hvis(dst, uc, flag, nextc, extra); + else + dst = do_svis(dst, uc, flag, nextc, extra); + free(extra); *dst = '\0'; - return (dst); + return dst; } /* * strvis, strvisx - visually encode characters from src into dst - * + * * Dst must be 4 times the size of src to account for possible * expansion. The length of dst, not including the trailing NULL, - * is returned. + * is returned. * * Strvisx encodes exactly len bytes from src into dst. * This is useful for encoding a block of data. */ - -int ROKEN_LIB_FUNCTION +ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL rk_strvis(char *dst, const char *src, int flag) { - char extra[MAXEXTRAS]; + char *extra = NULL; + int rv; - MAKEEXTRALIST(flag, extra); - return (rk_strsvis(dst, src, flag, extra)); + MAKEEXTRALIST(flag, extra, ""); + if (!extra) { + *dst = '\0'; /* can't create extra, return "" */ + return 0; + } + rv = strsvis(dst, src, flag, extra); + free(extra); + return rv; } -int ROKEN_LIB_FUNCTION +ROKEN_LIB_FUNCTION int ROKEN_LIB_CALL rk_strvisx(char *dst, const char *src, size_t len, int flag) { - char extra[MAXEXTRAS]; + char *extra = NULL; + int rv; - MAKEEXTRALIST(flag, extra); - return (rk_strsvisx(dst, src, len, flag, extra)); + MAKEEXTRALIST(flag, extra, ""); + if (!extra) { + *dst = '\0'; /* can't create extra, return "" */ + return 0; + } + rv = strsvisx(dst, src, len, flag, extra); + free(extra); + return rv; } +#endif |