version 1.5, 1998/12/20 23:17:54
|
version 1.7, 1999/06/20 19:56:47
|
Line 26 Create magicbuf 8 allot
|
Line 26 Create magicbuf 8 allot
|
Variable bswap? |
Variable bswap? |
Variable tchars |
Variable tchars |
Variable tcell |
Variable tcell |
|
Variable au |
|
|
: bswap ( n -- n' ) bswap? @ 0= ?EXIT 0 |
: bswap ( n -- n' ) bswap? @ 0= ?EXIT 0 |
over 24 rshift $FF and or |
over 24 rshift $FF and or |
Line 35 Variable tcell
|
Line 36 Variable tcell
|
|
|
: search-magic ( fd -- ) >r |
: search-magic ( fd -- ) >r |
BEGIN magicbuf 8 r@ read-file throw 8 = WHILE |
BEGIN magicbuf 8 r@ read-file throw 8 = WHILE |
magicbuf s" Gforth" tuck compare 0= UNTIL |
magicbuf s" Gforth2" tuck compare 0= UNTIL |
ELSE true abort" No magic found" THEN |
ELSE true abort" No magic found" THEN |
magicbuf 6 + c@ digit? drop tchars ! |
1 magicbuf 7 + c@ 5 rshift 3 and lshift tchars ! |
magicbuf 7 + c@ digit? drop dup -2 and tcell ! |
1 magicbuf 7 + c@ 1 rshift 3 and lshift tcell ! |
1 and 0= [ pad off 1 pad ! pad c@ 1 = ] Literal = bswap? ! |
1 magicbuf 7 + c@ 3 rshift 3 and lshift au ! |
|
magicbuf 7 + c@ 1 and 0= |
|
[ pad off 1 pad ! pad c@ 1 = ] Literal = bswap? ! |
|
." /* Image with " tcell @ . ." bytes cell, " tchars @ . ." bytes per char and " au @ . ." bytes per address unit */" cr |
rdrop ; |
rdrop ; |
|
|
Create image-header 4 cells allot |
Create image-header 4 cells allot |
Line 48 Variable bitmap-chars
|
Line 52 Variable bitmap-chars
|
|
|
: read-header ( fd -- ) |
: read-header ( fd -- ) |
image-header 4 cells rot read-file throw drop |
image-header 4 cells rot read-file throw drop |
image-header 2 cells + @ bswap tchars @ * |
image-header 2 cells + @ bswap tchars @ * au @ / |
dup cell / image-cells ! 1- 8 cells / 1+ bitmap-chars ! |
dup cell / image-cells ! 1- 8 cells / 1+ bitmap-chars ! |
image-cells @ cells allocate throw to image |
image-cells @ cells allocate throw to image |
bitmap-chars @ allocate throw to bitmap ; |
bitmap-chars @ allocate throw to bitmap ; |
Line 81 Variable bitmap-chars
|
Line 85 Variable bitmap-chars
|
r@ read-dictionary r@ read-bitmap r> close-file throw ; |
r@ read-dictionary r@ read-bitmap r> close-file throw ; |
|
|
: .imagesize ( -- ) |
: .imagesize ( -- ) |
image-header 3 cells + @ bswap tcell @ / tchars @ * .08x ; |
image-header 3 cells + @ bswap tcell @ / tchars @ * au @ / .08x ; |
|
|
: .relocsize ( -- ) |
: .relocsize ( -- ) |
bitmap-chars @ 1- tchars @ / 1+ .08x ; |
bitmap-chars @ 1- tchars @ / 1+ .08x ; |