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annotate lib/alib/parsnstr.as @ 3278:ea1afb494127

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defs: Add Bt.Sec for atari and corsham
author Tormod Volden <debian.tormod@gmail.com>
date Sat, 07 Mar 2020 23:52:40 +0100
parents 03f26e88b809
children
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1 * Parse sign bit terminated string to convert it to a
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2 * null terminated string. Note: if X and Y are the same
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3 * the existing string will be overwritten -- don't do this
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4 * with psects...
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5
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6 * OTHER MODULES NEEDED: none
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7
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8 * ENTRY: X=start of sign bit terminated string
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9 * Y=buffer for null terminated string
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10
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11 * EXIT: D=string size (not including null)
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12 * All other regs (except cc) preserved
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15 nam Parse sign-bit terminated string
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16 ttl Assembler Library Module
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18
2782
aaba193af04f Updated code to use lwasm/lwlink
Boisy Pitre <boisy.pitre@nuance.com>
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19 section .text
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21
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22 PARSNSTR:
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23 pshs x
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24 lbsr STRHCPY copy string
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25 tfr y,x point to moved string
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26 lbsr STRHLEN find length of string
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27 pshs d size
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28 leax d,x
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29 lda ,-x get final byte
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30 anda #%01111111 clear sign bit
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31 clrb add null terminator
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32 std ,x
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33 puls d,x,pc
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36 endsect
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