Array: Difference between revisions

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This method is best for pre-defined arrays. Its usage was shown in earlier examples. Most assemblers can create a constant based off simple arithmetic using labels. A label's numeric value is the address it gets assembled to, decided at assemble time. Placing another label immediately after the end of an array will point it to the next byte after that array. The assembler subtracts the array's beginning label from this value to create a size constant that you don't have to manually adjust if you change the number of entries the array has.

This method can be used with array variables in conjunction with a null terminator and padding the distance between the terminator and the end of the range dedicated to storing array variables.

=====Size Variable=====

This method is best for arrays that are not pre-defined. Placed before the 0th element of the array is its maximum size. This value's location relative to the 0th element is always the same, regardless of how long the array actually is. As such, the pointer to the 0th element can be offset by a fixed negative amount to get the size. Alternatively, rather than storing the size of the array, a pointer to the last element can also be stored in front of the array.

===[[Fortran]]===