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/* This file is part of the SvarCOM project and is published under the terms
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/* This file is part of the SvarCOM project and is published under the terms
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* of the MIT license.
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* of the MIT license.
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*
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*
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* Copyright (C) 2021 Mateusz Viste
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* Copyright (C) 2021-2022 Mateusz Viste
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*
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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r++;
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r++;
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}
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}
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}
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}
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/* locates the value of env variable varname and copies it to result, up to
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* ressz bytes (incl. the NULL terminator). returns the length of the value on
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* success, 0 if var not found or couldn't fit in ressz). */
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unsigned short env_lookup_valcopy(char *res, unsigned short ressz, unsigned short env_seg, const char *varname) {
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unsigned short i;
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char far *v = env_lookup_val(env_seg, varname);
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if (v == NULL) return(0);
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for (i = 0;; i++) {
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if (ressz-- == 0) return(0);
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res[i] = v[i];
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if (res[i] == 0) return(i);
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}
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}
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/* returns the size, in bytes, of the allocated environment block */
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/* returns the size, in bytes, of the allocated environment block */
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unsigned short env_allocsz(unsigned short env_seg) {
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unsigned short env_allocsz(unsigned short env_seg) {
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unsigned short far *mcbsz = MK_FP(env_seg - 1, 3); /* block size is a word at offset +3 in the MCB */
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unsigned short far *mcbsz = MK_FP(env_seg - 1, 3); /* block size is a word at offset +3 in the MCB */
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return(*mcbsz * 16); /* return size in bytes, not paragraphs */
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return(*mcbsz * 16); /* return size in bytes, not paragraphs */
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}
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}
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