collapseos/blk/291
Virgil Dupras 2d17b4e8ec Make string length-prefixed instead of null-terminated
I'm not sure why I chose null-terminated initially. Probably because
the z80asm version had null-terminated strings.

Length-prefixes strings are the traditional form of strings in Forth
and it's a bit easier to work with them with traditional forth words
when they're under this form.
2020-05-25 20:34:52 -04:00

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PC ORG @ 4 + ! ( find )
( Find the entry corresponding to word name where (HL) points
to in dictionary having its tip at DE and sets DE to point
to that entry. Z if found, NZ if not. )
BC PUSHqq,
HL PUSHqq,
( First, figure out string len )
A (HL) LDrr, A ORr,
( special case. zero len? we never find anything. )
IFNZ, ( fail-B296 )
( Let's do something weird: We'll hold HL by the *tail*.
Because of our dict structure and because we know our
lengths, it's easier to compare starting from the end. )
C A LDrr, B 0 LDrn, ( C holds our length )
BC ADDHLss, HL INCss, ( HL points to after-last-char )
( cont . )