Copy string

Purpose: Copies string to another string.

 copy-string <source string> to <dest string> \
     [ start-with <start with> ] \
     [ length <length> ]

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Use copy-string to copy <source string> to <dest string>.

<start with> number (in "start-with" clause) is the position in <source string> to start copying from, with 0 being the first byte.

Without "length" clause, the whole of <source string> is copied. With "length" clause, exactly <length> bytes are copied into <dest string>.

You can copy a string to itself. In this case, the original string remains and the new string references a copy:

 set-string str = "original string" // string to change

 set-string orig = str // references original copy of the string to change

 copy-string str to str // make a copy of string to change and assign it to itself

 upper-string str // change the copy

 // Now "str" references "ORIGINAL STRING" 
 // and "orig" references "original string"

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Examples

After copy-string below, "my_str" will be a copy of string "some value":

 set-string other_string="some value"
 copy-string other_string to my_str

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Copy certain number of bytes, the result in "my_str" will be "ome":

 set-string other_string="some value"
 copy-string other_string to my_str length 3 start-with 1

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