mirror of
https://github.com/pnx/m16vm
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63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/* program.c
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*
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* Copyright (C) 2012,2014-2015,2018-2019,2023 Henrik Hautakoski <henrik.hautakoski@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <unistd.h>
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#include "program.h"
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int program_loadfromfile(struct program *prog, const char *filename) {
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struct stat st;
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ssize_t rc = -1;
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int fd;
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fd = open(filename, O_RDONLY);
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if (fd < 0) {
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fprintf(stderr, "Could not open file %s: %s\n",
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filename, strerror(errno));
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return -1;
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}
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if (fstat(fd, &st) < 0)
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goto close_fd;
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prog->len = st.st_size;
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prog->instr = malloc(prog->len);
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if (prog->instr == NULL)
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goto close_fd;
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rc = read(fd, prog->instr, prog->len);
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if (rc < 0)
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goto free_mem;
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return rc;
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free_mem: free(prog->instr);
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close_fd: close(fd);
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return rc;
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}
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void program_free(struct program *prog) {
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free(prog->instr);
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prog->len = 0;
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}
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