qcacmn: Add qdf_str files to QDF

Add files for QDF string APIs. Existing qdf_str_* APIs will be moved as
part of a future change.

Change-Id: If98d41380b2f7f62bbe5de141b6827e9427944ab
CRs-Fixed: 2184462

qdf/inc/qdf_str.h

@@ -0,0 +1,91 @@
+/*
+ * Copyright (c) 2018 The Linux Foundation. All rights reserved.
+ *
+ * Permission to use, copy, modify, and/or distribute this software for
+ * any purpose with or without fee is hereby granted, provided that the
+ * above copyright notice and this permission notice appear in all
+ * copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+ * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+ * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
+ * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
+ * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ */
+
+/**
+ * DOC: qdf_str
+ * QCA driver framework (QDF) string APIs.
+ */
+
+#ifndef __QDF_STR_H
+#define __QDF_STR_H
+
+#include "i_qdf_str.h"
+#include "qdf_types.h"
+
+/**
+ * qdf_is_space() - check if @c is a whitespace character
+ * @c: the character to check
+ *
+ * Whitespace characters include HT, LF, VT, FF, CR, space, and nbsp
+ *
+ * Return: true if @ is a whitespace character
+ */
+static inline bool qdf_is_space(char c)
+{
+	return __qdf_is_space(c);
+}
+
+/**
+ * qdf_str_left_trim() - Trim any leading whitespace from @str
+ * @str: the string to trim
+ *
+ * Return: A pointer to the first non-space character in @str
+ */
+static inline char *qdf_str_left_trim(char *str)
+{
+	return __qdf_str_left_trim(str);
+}
+
+/**
+ * qdf_str_right_trim() - Trim any trailing whitespace from @str
+ * @str: the string to trim
+ *
+ * Note: The first trailing whitespace character is replaced with a
+ * null-terminator
+ *
+ * Return: None
+ */
+void qdf_str_right_trim(char *str);
+
+/**
+ * qdf_str_trim() - Trim any leading/trailing whitespace from @str
+ * @str: the string to trim
+ *
+ * Note: The first trailing whitespace character is replaced with a
+ * null-terminator
+ *
+ * Return: A pointer to the first non-space character in @str
+ */
+static inline char *qdf_str_trim(char *str)
+{
+	return __qdf_str_trim(str);
+}
+
+/**
+ * qdf_str_nlen() - Get string length up to @limit characters
+ * @str: the string to get the length of
+ * @limit: the maximum number of characters to check
+ *
+ * Return: length of @str, or @limit if the end is not found
+ */
+static inline qdf_size_t qdf_str_nlen(const char *str, size_t limit)
+{
+	return __qdf_str_nlen(str, limit);
+}
+
+#endif /* __QDF_STR_H */