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-rw-r--r--lib/linux_string.c51
1 files changed, 51 insertions, 0 deletions
diff --git a/lib/linux_string.c b/lib/linux_string.c
new file mode 100644
index 0000000000..d5a5e08d98
--- /dev/null
+++ b/lib/linux_string.c
@@ -0,0 +1,51 @@
+/*
+ * linux/lib/string.c
+ *
+ * Copyright (C) 1991, 1992 Linus Torvalds
+ */
+
+#ifdef USE_HOSTCC
+#include <stdio.h>
+#endif
+
+#include <linux/ctype.h>
+#include <linux/string.h>
+
+/**
+ * skip_spaces - Removes leading whitespace from @str.
+ * @str: The string to be stripped.
+ *
+ * Returns a pointer to the first non-whitespace character in @str.
+ */
+char *skip_spaces(const char *str)
+{
+ while (isspace(*str))
+ ++str;
+ return (char *)str;
+}
+
+/**
+ * strim - Removes leading and trailing whitespace from @s.
+ * @s: The string to be stripped.
+ *
+ * Note that the first trailing whitespace is replaced with a %NUL-terminator
+ * in the given string @s. Returns a pointer to the first non-whitespace
+ * character in @s.
+ */
+char *strim(char *s)
+{
+ size_t size;
+ char *end;
+
+ s = skip_spaces(s);
+ size = strlen(s);
+ if (!size)
+ return s;
+
+ end = s + size - 1;
+ while (end >= s && isspace(*end))
+ end--;
+ *(end + 1) = '\0';
+
+ return s;
+}