38 lines
928 B
Factor
38 lines
928 B
Factor
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USING: io io.encodings.ascii io.files io.files.temp io.launcher
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locals math.parser sequences sequences.deep ;
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IN: size-of
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! Use 'size-of' to find out the size in bytes of a C type.
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!
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! The 'headers' argument is a list of header files to use. You may
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! pass 'f' to only use 'stdio.h'.
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!
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! Examples:
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!
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! f "int" size-of .
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!
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! { "X11/Xlib.h" } "XAnyEvent" size-of .
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:: size-of ( HEADERS TYPE -- n )
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[let | C-FILE [ "size-of.c" temp-file ]
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EXE-FILE [ "size-of" temp-file ]
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INCLUDES [ HEADERS [| FILE | { "#include <" FILE ">" } concat ] map ] |
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{
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"#include <stdio.h>"
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INCLUDES
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"main() { printf( \"%i\" , sizeof( " TYPE " ) ) ; }"
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}
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flatten C-FILE ascii set-file-lines
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{ "gcc" C-FILE "-o" EXE-FILE } try-process
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EXE-FILE ascii <process-reader> contents string>number ] ;
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! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
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