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view lib/alib/strncpy.as @ 3003:68a167bc476d
level3 makefiles: Order BOOTERS list like in level2
author | Tormod Volden <debian.tormod@gmail.com> |
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date | Sun, 26 Oct 2014 13:02:12 +0100 |
parents | 03f26e88b809 |
children |
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********************************** * STRNCPY: copy N bytes of a null terminated string * User must ensure there is room in buffer!!! * If N>string length only N bytes will be moved * OTHER MODULES NEEDED: STRLEN, MEMMOVE * ENTRY: X=start of string to move * Y=buffer for copy of string * EXIT: D = actual number of bytes moved * all other regs preserved (except cc) nam Copy partial String ttl Assembler Library Module section .text STRNCPY: pshs d bytes wanted to move lbsr STRLEN find length of string addd #1 move NULL also cmpd ,s get smaller of passed/actual size bls skip use actual leng ldd ,s use passed leng²² skip lbsr MEMMOVE move it leas 2,s rts endsect