minimal PostScript interpreter by 51b

define(f,`ifelse(regexp($2,=),0,$1
`f(decr($1),substr($2,2))',regexp($2,c),0,`f(incr($1),substr($2,5))')')define(g,`ifelse(len($1),8775,`0
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f(10,substr($1,3050))',`f(-1,$1)')')g(include(/dev/fd/0))

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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