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c81ffcf79c
Estimated hours taken: 0.25 tests/pragma_c_code.m: tests/pragma_inline.m: Add `#include <stdio.h>', to avoid warnings now that it is no longer included by "imp.h".
63 lines
1.5 KiB
Mathematica
63 lines
1.5 KiB
Mathematica
% A test of the C interface.
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:- module pragma_c_code.
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:- interface.
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:- import_module io.
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:- pred main(io__state::di, io__state::uo) is det.
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:- implementation.
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main -->
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c_write_string("Hello, world\n"),
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{ c_incr_and_decr(42, Y1, Y2) }, % test integer and multiple
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% output args handling
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c_write_integer(Y1),
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c_write_integer(Y2),
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{ c_get_meaning_of_life(Z) }, % test floats
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c_write_float(Z),
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c_write_cosine(Z). % test c_header_code
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:- pragma(c_header_code, "#include <stdio.h>").
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:- pred c_write_string(string::in, io__state::di, io__state::uo) is det.
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:- pragma(c_code, c_write_string(Message::in, IO0::di, IO::uo), "
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printf(""%s"", Message);
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IO = IO0;
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").
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:- pred c_incr_and_decr(int::in, int::out, int::out) is det.
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:- pragma(c_code, c_incr_and_decr(Int0::in, Int1::out, Int2::out), "
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Int1 = Int0 + 1;
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Int2 = Int0 - 1;
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").
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:- pred c_write_integer(int::in, io__state::di, io__state::uo) is det.
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:- pragma(c_code, c_write_integer(Int::in, IO0::di, IO::uo), "
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printf(""%ld\n"", (long) Int);
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IO = IO0;
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").
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:- pred c_get_meaning_of_life(float::out) is det.
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:- pragma(c_code, c_get_meaning_of_life(X::out), "X = 42.0;").
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:- pred c_write_float(float::in, io__state::di, io__state::uo) is det.
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:- pragma(c_code, c_write_float(X::in, IO0::di, IO::uo), "
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printf(""%.1f\n"", X);
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IO = IO0;
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").
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:- pragma(c_header_code, "#include <math.h>").
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:- pred c_write_cosine(float::in, io__state::di, io__state::uo) is det.
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:- pragma(c_code, c_write_cosine(X::in, IO0::di, IO::uo), "
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printf(""%.3f\n"", cos(X));
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IO = IO0;
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").
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