1 files changed, 150 insertions, 0 deletions
diff --git a/usr.bin/dtc/string.cc b/usr.bin/dtc/string.cc
new file mode 100644
index 000000000000..9179394c509b
--- /dev/null
+++ b/usr.bin/dtc/string.cc
@@ -0,0 +1,150 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2013 David Chisnall
+ * All rights reserved.
+ *
+ * This software was developed by SRI International and the University of
+ * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
+ * ("CTSRD"), as part of the DARPA CRASH research programme.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <string>
+#include <functional>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctype.h>
+#include <libgen.h>
+
+#include "util.hh"
+
+using std::string;
+
+namespace dtc
+{
+
+void
+push_string(byte_buffer &buffer, const string &s, bool escapes)
+{
+	size_t length = s.size();
+	for (size_t i=0 ; i<length ; ++i)
+	{
+		uint8_t c = s[i];
+		if (escapes && c == '\\' && i+1 < length)
+		{
+			c = s[++i];
+			switch (c)
+			{
+				// For now, we just ignore invalid escape sequences.
+				default:
+				case '"':
+				case '\'':
+				case '\\':
+					break;
+				case 'a':
+					c = '\a';
+					break;
+				case 'b':
+					c = '\b';
+					break;
+				case 't':
+					c = '\t';
+					break;
+				case 'n':
+					c = '\n';
+					break;
+				case 'v':
+					c = '\v';
+					break;
+				case 'f':
+					c = '\f';
+					break;
+				case 'r':
+					c = '\r';
+					break;
+				case '0'...'7':
+				{
+					int v = digittoint(c);
+					if (i+1 < length && s[i+1] <= '7' && s[i+1] >= '0')
+					{
+						v <<= 3;
+						v |= digittoint(s[i+1]);
+						i++;
+						if (i+1 < length && s[i+1] <= '7' && s[i+1] >= '0')
+						{
+							v <<= 3;
+							v |= digittoint(s[i+1]);
+						}
+					}
+					c = (uint8_t)v;
+					break;
+				}
+				case 'x':
+				{
+					++i;
+					if (i >= length)
+					{
+						break;
+					}
+					int v = digittoint(s[i]);
+					if (i+1 < length && ishexdigit(s[i+1]))
+					{
+						v <<= 4;
+						v |= digittoint(s[++i]);
+					}
+					c = (uint8_t)v;
+					break;
+				}
+			}
+		}
+		buffer.push_back(c);
+	}
+}
+
+namespace {
+string
+dirbasename(std::function<char*(char*)> fn, const string &s)
+{
+	if (s == string())
+	{
+		return string();
+	}
+	std::unique_ptr<char, decltype(free)*> str = {strdup(s.c_str()), free};
+	string dn(fn(str.get()));
+	return dn;
+}
+}
+
+string dirname(const string &s)
+{
+	return dirbasename(::dirname, s);
+}
+
+string basename(const string &s)
+{
+	return dirbasename(::basename, s);
+}
+} // namespace dtc
+