66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* Copyright 2008-2013 Various Authors
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* Copyright 2004 Timo Hirvonen
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* 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, see <http://www.gnu.org/licenses/>.
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*/
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#include "read_wrapper.h"
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#include "ip.h"
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#include "file.h"
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#include <unistd.h>
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ssize_t read_wrapper(struct input_plugin_data *ip_data, void *buffer, size_t count)
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{
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int rc;
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if (ip_data->metaint == 0) {
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/* no metadata in the stream */
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return read(ip_data->fd, buffer, count);
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}
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if (ip_data->counter == ip_data->metaint) {
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/* read metadata */
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unsigned char byte;
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int len;
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rc = read(ip_data->fd, &byte, 1);
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if (rc == -1)
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return -1;
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if (rc == 0)
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return 0;
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if (byte != 0) {
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len = ((int)byte) * 16;
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ip_data->metadata[0] = 0;
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rc = read_all(ip_data->fd, ip_data->metadata, len);
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if (rc == -1)
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return -1;
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if (rc < len) {
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ip_data->metadata[0] = 0;
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return 0;
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}
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ip_data->metadata[len] = 0;
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ip_data->metadata_changed = 1;
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}
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ip_data->counter = 0;
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}
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if (count + ip_data->counter > ip_data->metaint)
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count = ip_data->metaint - ip_data->counter;
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rc = read(ip_data->fd, buffer, count);
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if (rc > 0)
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ip_data->counter += rc;
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return rc;
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}
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