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You can use these primitives to manipulate strings (in the argument
field of GASP statements):
.LEN("str")
- Calculate the length of string
"str"
, as an absolute
expression. For example, `.RES.B .LEN("sample")' reserves six
bytes of memory.
.INSTR("string", "seg", ix)
- Search for the first occurrence of seg after position ix of
string. For example, `.INSTR("ABCDEFG", "CDE", 0)' evaluates
to the absolute result
2
.
The result is -1
if seg does not occur in string
after position ix.
.SUBSTR("string",start,len)
- The substring of string beginning at byte number start and
extending for len bytes.
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