Subversion Repositories Kolibri OS

(*

    BSD 2-Clause License

    Copyright (c) 2020, Anton Krotov

    All rights reserved.

*)

MODULE Out;

IMPORT SYSTEM, Libdl;

VAR

    printf1: PROCEDURE [linux] (fmt: INTEGER; x: INTEGER);

    printf2: PROCEDURE [linux] (fmt: INTEGER; width, x: INTEGER);

    printf3: PROCEDURE [linux] (fmt: INTEGER; width, precision: INTEGER; x: REAL);

PROCEDURE Char* (x: CHAR);

BEGIN

    printf1(SYSTEM.SADR("%c"), ORD(x))

END Char;

PROCEDURE String* (s: ARRAY OF CHAR);

BEGIN

    printf2(SYSTEM.SADR("%.*s"), LENGTH(s), SYSTEM.ADR(s[0]))

END String;

PROCEDURE Ln*;

BEGIN

    printf1(SYSTEM.SADR("%s"), SYSTEM.SADR(0AX))

END Ln;

PROCEDURE Int* (x, width: INTEGER);

BEGIN

    printf2(SYSTEM.SADR("%*d"), width, x)

END Int;

PROCEDURE Real* (x: REAL; width: INTEGER);

BEGIN

    printf3(SYSTEM.SADR("%*.*E"), width, MAX(MIN(width - 8, 15), 1), x)

END Real;

PROCEDURE FixReal* (x: REAL; width, precision: INTEGER);

BEGIN

    printf3(SYSTEM.SADR("%*.*f"), width, precision, x)

END FixReal;

PROCEDURE Open*;

END Open;

PROCEDURE init;

VAR

    libc, printf: INTEGER;

BEGIN

    libc := Libdl.open("libc.so.6", Libdl.LAZY);

    ASSERT(libc # 0);

    printf := Libdl.sym(libc, "printf");

    ASSERT(printf # 0);

    SYSTEM.PUT(SYSTEM.ADR(printf1), printf);

    SYSTEM.PUT(SYSTEM.ADR(printf2), printf);

    SYSTEM.PUT(SYSTEM.ADR(printf3), printf);

END init;

BEGIN

    init

END Out.