--- /dev/null
+/*
+ * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ *
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License"). You may not use this file except in compliance with the
+ * License. Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
+ *
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * @APPLE_LICENSE_HEADER_END@
+ */
+/*
+ * Copyright (c) 1989, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 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.
+ */
+
+
+#include <sys/types.h>
+#include <limits.h>
+#include <ctype.h>
+#include <vis.h>
+
+#define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
+
+/*
+ * vis - visually encode characters
+ */
+char *
+vis(dst, c, flag, nextc)
+ register char *dst;
+ int c, nextc;
+ register int flag;
+{
+ if ((u_int)c <= UCHAR_MAX && isgraph(c) ||
+ ((flag & VIS_SP) == 0 && c == ' ') ||
+ ((flag & VIS_TAB) == 0 && c == '\t') ||
+ ((flag & VIS_NL) == 0 && c == '\n') ||
+ ((flag & VIS_SAFE) && (c == '\b' || c == '\007' || c == '\r'))) {
+ *dst++ = c;
+ if (c == '\\' && (flag & VIS_NOSLASH) == 0)
+ *dst++ = '\\';
+ *dst = '\0';
+ return (dst);
+ }
+
+ if (flag & VIS_CSTYLE) {
+ switch(c) {
+ case '\n':
+ *dst++ = '\\';
+ *dst++ = 'n';
+ goto done;
+ case '\r':
+ *dst++ = '\\';
+ *dst++ = 'r';
+ goto done;
+ case '\b':
+ *dst++ = '\\';
+ *dst++ = 'b';
+ goto done;
+#if __STDC__
+ case '\a':
+#else
+ case '\007':
+#endif
+ *dst++ = '\\';
+ *dst++ = 'a';
+ goto done;
+ case '\v':
+ *dst++ = '\\';
+ *dst++ = 'v';
+ goto done;
+ case '\t':
+ *dst++ = '\\';
+ *dst++ = 't';
+ goto done;
+ case '\f':
+ *dst++ = '\\';
+ *dst++ = 'f';
+ goto done;
+ case ' ':
+ *dst++ = '\\';
+ *dst++ = 's';
+ goto done;
+ case '\0':
+ *dst++ = '\\';
+ *dst++ = '0';
+ if (isoctal(nextc)) {
+ *dst++ = '0';
+ *dst++ = '0';
+ }
+ goto done;
+ }
+ }
+ if (((c & 0177) == ' ') || (flag & VIS_OCTAL)) {
+ *dst++ = '\\';
+ *dst++ = ((u_char)c >> 6 & 07) + '0';
+ *dst++ = ((u_char)c >> 3 & 07) + '0';
+ *dst++ = ((u_char)c & 07) + '0';
+ goto done;
+ }
+ 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;
+ }
+done:
+ *dst = '\0';
+ 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.
+ *
+ * Strvisx encodes exactly len bytes from src into dst.
+ * This is useful for encoding a block of data.
+ */
+int
+strvis(dst, src, flag)
+ register char *dst;
+ register const char *src;
+ int flag;
+{
+ register char c;
+ char *start;
+
+ for (start = dst; c = *src;)
+ dst = vis(dst, c, flag, *++src);
+ *dst = '\0';
+ return (dst - start);
+}
+
+int
+strvisx(dst, src, len, flag)
+ register char *dst;
+ register const char *src;
+ register size_t len;
+ int flag;
+{
+ int c;
+ char *start;
+
+ for (start = dst; len > 1; len--) {
+ c = *src;
+ dst = vis(dst, c, flag, *++src);
+ }
+ if (len)
+ dst = vis(dst, *src, flag, '\0');
+ *dst = '\0';
+
+ return (dst - start);
+}
projects / apple / libc.git / blobdiff