util/StringUtil: move strip functions to StringStrip.cxx

src/util/StringStrip.hxx

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2009-2017 Max Kellermann <max.kellermann@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - 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 COPYRIGHT HOLDERS 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.
+ */
+
+#ifndef STRING_STRIP_HXX
+#define STRING_STRIP_HXX
+
+#include "Compiler.h"
+
+#include <stddef.h>
+
+/**
+ * Returns a pointer to the first non-whitespace character in the
+ * string, or to the end of the string.
+ */
+gcc_pure
+const char *
+StripLeft(const char *p) noexcept;
+
+gcc_pure
+static inline char *
+StripLeft(char *p) noexcept
+{
+	return const_cast<char *>(StripLeft((const char *)p));
+}
+
+gcc_pure
+const char *
+StripLeft(const char *p, const char *end) noexcept;
+
+/**
+ * Determine the string's end as if it was stripped on the right side.
+ */
+gcc_pure
+const char *
+StripRight(const char *p, const char *end) noexcept;
+
+/**
+ * Determine the string's end as if it was stripped on the right side.
+ */
+gcc_pure
+static inline char *
+StripRight(char *p, char *end) noexcept
+{
+	return const_cast<char *>(StripRight((const char *)p,
+					     (const char *)end));
+}
+
+/**
+ * Determine the string's length as if it was stripped on the right
+ * side.
+ */
+gcc_pure
+size_t
+StripRight(const char *p, size_t length) noexcept;
+
+/**
+ * Strip trailing whitespace by null-terminating the string.
+ */
+void
+StripRight(char *p) noexcept;
+
+/**
+ * Skip whitespace at the beginning and terminate the string after the
+ * last non-whitespace character.
+ */
+char *
+Strip(char *p) noexcept;
+
+#endif