/*

 *  Advanced Linux Sound Architecture Control Program - Support routines

 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>

 *

 *

 *   This program is free software; you can redistribute it and/or modify

 *   it under the terms of the GNU General Public License as published by

 *   the Free Software Foundation; either version 2 of the License, or

 *   (at your option) any later version.

 *

 *   This program is distributed in the hope that it will be useful,

 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *   GNU General Public License for more details.

 *

 *   You should have received a copy of the GNU General Public License

 *   along with this program; if not, write to the Free Software

 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 */

#include <stdlib.h>

#include <stdio.h>

#include <stddef.h>

#include <unistd.h>

#include <fcntl.h>

#include <errno.h>

#include <ctype.h>

#include <dirent.h>

#include <syslog.h>

#include <sys/stat.h>

#include <sys/mman.h>

#include <alsa/asoundlib.h>

#include "alsactl.h"

int file_map(const char *filename, char **buf, size_t *bufsize)

{

	struct stat stats;

	int fd;

	fd = open(filename, O_RDONLY);

	if (fd < 0) {

		return -1;

	}

	if (fstat(fd, &stats) < 0) {

		close(fd);

		return -1;

	}

	*buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);

	if (*buf == MAP_FAILED) {

		close(fd);

		return -1;

	}

	*bufsize = stats.st_size;

	close(fd);

	return 0;

}

void file_unmap(void *buf, size_t bufsize)

{

	munmap(buf, bufsize);

}

size_t line_width(const char *buf, size_t bufsize, size_t pos)

{

	int esc = 0;

	size_t count;

	for (count = pos; count < bufsize; count++) {

		if (!esc && buf[count] == '\n')

			break;

		esc = buf[count] == '\\';

	}

	return count - pos;

}

void initfailed(int cardnumber, const char *reason, int exitcode)

{

	int fp;

	char *str;

	char sexitcode[16];

	if (statefile == NULL)

		return;

	if (snd_card_get_name(cardnumber, &str) < 0)

		return;

	sprintf(sexitcode, "%i", exitcode);

	fp = open(statefile, O_WRONLY|O_CREAT|O_APPEND, 0644);

	write(fp, str, strlen(str));

	write(fp, ":", 1);

	write(fp, reason, strlen(reason));

	write(fp, ":", 1);

	write(fp, sexitcode, strlen(sexitcode));

	write(fp, "\n", 1);

	close(fp);

	free(str);

}

static void syslog_(int prio, const char *fcn, long line,

		    const char *fmt, va_list ap)

{

	char buf[1024];

	snprintf(buf, sizeof(buf), "%s: %s:%ld", command, fcn, line);

	buf[sizeof(buf)-1] = '\0';

	vsnprintf(buf + strlen(buf), sizeof(buf)-strlen(buf), fmt, ap);

	buf[sizeof(buf)-1] = '\0';

	syslog(LOG_INFO, "%s", buf);

}

void info_(const char *fcn, long line, const char *fmt, ...)

{

	va_list ap;

	va_start(ap, fmt);

	if (use_syslog) {

		syslog_(LOG_INFO, fcn, line, fmt, ap);

	} else {

		fprintf(stdout, "%s: %s:%ld: ", command, fcn, line);

		vfprintf(stdout, fmt, ap);

		putc('\n', stdout);

	}

	va_end(ap);

}

void error_(const char *fcn, long line, const char *fmt, ...)

{

	va_list ap;

	va_start(ap, fmt);

	if (use_syslog) {

		syslog_(LOG_ERR, fcn, line, fmt, ap);

	} else {

		fprintf(stderr, "%s: %s:%ld: ", command, fcn, line);

		vfprintf(stderr, fmt, ap);

		putc('\n', stderr);

	}

	va_end(ap);

}

void cerror_(const char *fcn, long line, int cond, const char *fmt, ...)

{

	va_list ap;

	if (!cond && !debugflag)

		return;

	va_start(ap, fmt);

	if (use_syslog) {

		syslog_(LOG_ERR, fcn, line, fmt, ap);

	} else {

		fprintf(stderr, "%s: %s:%ld: ", command, fcn, line);

		vfprintf(stderr, fmt, ap);

		putc('\n', stderr);

	}

	va_end(ap);

}

void dbg_(const char *fcn, long line, const char *fmt, ...)

{

	va_list ap;

	if (!debugflag)

		return;

	va_start(ap, fmt);

	if (use_syslog) {

		syslog_(LOG_DEBUG, fcn, line, fmt, ap);

	} else {

		fprintf(stderr, "%s: %s:%ld: ", command, fcn, line);

		vfprintf(stderr, fmt, ap);

		putc('\n', stderr);

	}

	va_end(ap);

}