70 lines
1.2 KiB
Plaintext
70 lines
1.2 KiB
Plaintext
(*
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BSD 2-Clause License
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Copyright (c) 2020, Anton Krotov
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All rights reserved.
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*)
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MODULE Args;
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IMPORT SYSTEM, API;
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VAR
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argc*, envc*: INTEGER;
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PROCEDURE GetArg* (n: INTEGER; VAR s: ARRAY OF CHAR);
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VAR
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i, len, ptr: INTEGER;
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c: CHAR;
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BEGIN
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i := 0;
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len := LEN(s) - 1;
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IF (0 <= n) & (n <= argc + envc) & (n # argc) & (len > 0) THEN
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SYSTEM.GET(API.MainParam + (n + 1) * SYSTEM.SIZE(INTEGER), ptr);
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REPEAT
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SYSTEM.GET(ptr, c);
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s[i] := c;
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INC(i);
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INC(ptr)
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UNTIL (c = 0X) OR (i = len)
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END;
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s[i] := 0X
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END GetArg;
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PROCEDURE GetEnv* (n: INTEGER; VAR s: ARRAY OF CHAR);
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BEGIN
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IF (0 <= n) & (n < envc) THEN
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GetArg(n + argc + 1, s)
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ELSE
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s[0] := 0X
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END
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END GetEnv;
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PROCEDURE init;
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VAR
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ptr: INTEGER;
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BEGIN
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IF API.MainParam # 0 THEN
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envc := -1;
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SYSTEM.GET(API.MainParam, argc);
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REPEAT
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SYSTEM.GET(API.MainParam + (envc + argc + 3) * SYSTEM.SIZE(INTEGER), ptr);
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INC(envc)
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UNTIL ptr = 0
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ELSE
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envc := 0;
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argc := 0
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END
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END init;
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BEGIN
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init
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END Args. |