mirror of
https://github.com/alsa-project/alsa-utils
synced 2024-09-19 17:49:59 +02:00
b402cf543a
See 'man 7 alsactl_init' for more details. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
/*
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* Advanced Linux Sound Architecture Control Program - Support routines
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* Copyright (c) by Jaroslav Kysela <perex@perex.cz>
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*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include "alsactl.h"
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int file_map(const char *filename, char **buf, size_t *bufsize)
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{
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struct stat stats;
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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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return -1;
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}
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if (fstat(fd, &stats) < 0) {
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close(fd);
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return -1;
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}
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*buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);
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if (*buf == MAP_FAILED) {
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close(fd);
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return -1;
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}
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*bufsize = stats.st_size;
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close(fd);
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return 0;
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}
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void file_unmap(void *buf, size_t bufsize)
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{
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munmap(buf, bufsize);
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}
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size_t line_width(const char *buf, size_t bufsize, size_t pos)
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{
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int esc = 0;
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size_t count;
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for (count = pos; count < bufsize; count++) {
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if (!esc && buf[count] == '\n')
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break;
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esc = buf[count] == '\\';
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}
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return count - pos;
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}
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