45 lines
1.8 KiB
OCaml
45 lines
1.8 KiB
OCaml
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(* Description of primitive functions *)
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open Format
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type description =
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{ prim_name: string; (* Name of primitive or C function *)
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prim_arity: int; (* Number of arguments *)
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prim_alloc: bool; (* Does it allocates or raise? *)
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prim_native_name: string; (* Name of C function for the nat. code gen. *)
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prim_native_float: bool } (* Does the above operate on unboxed floats? *)
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let parse_declaration arity decl =
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match decl with
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name :: "noalloc" :: name2 :: "float" :: _ ->
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Some{prim_name = name; prim_arity = arity; prim_alloc = false;
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prim_native_name = name2; prim_native_float = true}
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| name :: "noalloc" :: name2 :: _ ->
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Some{prim_name = name; prim_arity = arity; prim_alloc = false;
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prim_native_name = name2; prim_native_float = false}
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| name :: name2 :: "float" :: _ ->
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Some{prim_name = name; prim_arity = arity; prim_alloc = true;
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prim_native_name = name2; prim_native_float = true}
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| name :: "noalloc" :: _ ->
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Some{prim_name = name; prim_arity = arity; prim_alloc = false;
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prim_native_name = ""; prim_native_float = false}
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| name :: name2 :: _ ->
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Some{prim_name = name; prim_arity = arity; prim_alloc = true;
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prim_native_name = name2; prim_native_float = false}
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| name :: _ ->
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Some{prim_name = name; prim_arity = arity; prim_alloc = true;
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prim_native_name = ""; prim_native_float = false}
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| [] ->
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None
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let print_quoted s = print_char '"'; print_string s; print_char '"'
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let print_description p =
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print_quoted p.prim_name;
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if not p.prim_alloc then
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(print_space(); print_quoted "noalloc");
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if p.prim_native_name <> "" then
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(print_space(); print_quoted p.prim_native_name);
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if p.prim_native_float then
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(print_space(); print_quoted "float")
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