2018-09-13 13:53:04 +00:00
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;license:MIT
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;(c) 2018 by 4am
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;
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; ProDOS - functions for constructing and passing around ProDOS pathnames
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;
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; Public functions
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; - ResetPath
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; - AddToPath
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;
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; Public constants
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; - kPathSeparator
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kPathSeparator
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!byte 1
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!raw "/"
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kHGRScreenshotDirectory
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2018-10-28 18:04:52 +00:00
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!byte 3
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!raw "HGR"
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kDHGRScreenshotDirectory
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!byte 4
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!raw "DHGR"
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2018-09-13 13:53:04 +00:00
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2018-10-27 22:47:27 +00:00
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kAttractModeSlideshowDirectory
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!byte 2
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!raw "SS"
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2018-10-28 21:20:48 +00:00
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kDemoDirectory
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!byte 4
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!raw "DEMO"
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2018-09-13 13:53:04 +00:00
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;------------------------------------------------------------------------------
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; ResetPath
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; reset gPathname to length 0
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;
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; in: none
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; out: X = 0
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; A/Y preserved
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;------------------------------------------------------------------------------
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ResetPath
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ldx #0
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stx gPathname
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rts
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;------------------------------------------------------------------------------
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; AddToPath
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; append a length-prefixed string to gPathname
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;
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; in: A contains low byte of address of length-prefixed string to append
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; Y contains high byte of address of length-prefixed string to append
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; out: all registers and flags clobbered
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; $00/$01 clobbered
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; gPathname updated with concatenated length-prefixed string
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;------------------------------------------------------------------------------
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AddToPath
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+STAY $00
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ldx gPathname ; current pathname length
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ldy #0
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lda ($00),y ; length of this segment
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tay
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iny
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sty @len
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ldy #$01
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- lda ($00),y
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sta gPathname+1,x
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inx
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iny
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@len=*+1
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cpy #$FD ; SMC
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bcc -
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stx gPathname
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rts
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