2 * header.c -- part of ZilUtils/ZilAsm
4 * Copyright (C) 2016, 2019 Jason Self <j@jxself.org>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Affero General Public License as
8 * published by the Free Software Foundation, either version 3 of the
9 * License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU Affero General Public License for more details.
16 * You should have received a copy of the GNU Affero General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>
19 * SPDX-License-Identifier: AGPL-3.0-or-later
22 #include <string.h> /* bzero */
28 Program_header_struct Program_header;
30 const unsigned MAX_HEADER_LEN = 40;
33 program_header_reset (unsigned zversion)
35 bzero (&Program_header, sizeof (Program_header));
36 Program_header.version = zversion;
40 program_header_build (void)
42 ZMemblock *zmb = zmem_init (MAX_HEADER_LEN);
43 zmem_putbyte (zmb, Program_header.version);
52 return ((w & 255) << 8) + (w >> 8);
57 outputToFile (Program_header_struct * pHeader, FILE * file)
59 Program_header_struct h;
60 memcpy (&h, pHeader, sizeof (Program_header_struct));
62 h.startPC = swapBytes (h.startPC);
63 h.h_file_size = swapBytes (h.h_file_size);
64 h.H_STRINGS_OFFSET = swapBytes (h.H_STRINGS_OFFSET);
66 int size = sizeof (Program_header_struct);
67 fwrite (&h, sizeof (Program_header_struct), 1, file);