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view lib/alib/parsnstr.as @ 3278:ea1afb494127
defs: Add Bt.Sec for atari and corsham
author | Tormod Volden <debian.tormod@gmail.com> |
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date | Sat, 07 Mar 2020 23:52:40 +0100 |
parents | 03f26e88b809 |
children |
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* Parse sign bit terminated string to convert it to a * null terminated string. Note: if X and Y are the same * the existing string will be overwritten -- don't do this * with psects... * OTHER MODULES NEEDED: none * ENTRY: X=start of sign bit terminated string * Y=buffer for null terminated string * EXIT: D=string size (not including null) * All other regs (except cc) preserved nam Parse sign-bit terminated string ttl Assembler Library Module section .text PARSNSTR: pshs x lbsr STRHCPY copy string tfr y,x point to moved string lbsr STRHLEN find length of string pshs d size leax d,x lda ,-x get final byte anda #%01111111 clear sign bit clrb add null terminator std ,x puls d,x,pc endsect