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4.5 Elementary string functions on NUL terminated strings

• Iterating over a NUL terminated Unicode string
• Length of a NUL terminated Unicode string
• Copying a NUL terminated Unicode string
• Comparing NUL terminated Unicode strings
• Duplicating a NUL terminated Unicode string
• Searching for a character in a NUL terminated Unicode string
• Searching for a substring in a NUL terminated Unicode string
• Tokenizing a NUL terminated Unicode string