/* Synchronet Serial Communications I/O Library Common Functions */

/****************************************************************************
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 * Copyright Rob Swindell - http://www.synchro.net/copyright.html			*
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 * This library is free software; you can redistribute it and/or			*
 * modify it under the terms of the GNU Lesser General Public License		*
 * as published by the Free Software Foundation; either version 2			*
 * of the License, or (at your option) any later version.					*
 * See the GNU Lesser General Public License for more details: lgpl.txt or	*
 * http://www.fsf.org/copyleft/lesser.html									*
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#include "comio.h"
#include "genwrap.h"    /* msclock */

size_t comReadBuf(COM_HANDLE handle, char* buf, size_t buflen, const char* terminators, int timeout)
{
	BYTE      ch;
	size_t    len = 0;
	msclock_t start = msclock();

	while (len < buflen) {
		if (!comReadByte(handle, &ch)) {
			if (timeout != COM_INFINITE_TIMEOUT && msclock() - start >= timeout)
				break;
			YIELD();
			continue;
		}
		if (len && terminators != NULL && strchr(terminators, ch) != NULL)
			break;
		buf[len++] = ch;
	}

	return len;
}

size_t comReadLine(COM_HANDLE handle, char* buf, size_t buflen, int timeout)
{
	size_t len;

	len = comReadBuf(handle, buf, buflen - 1, "\n", timeout);

	buf[len] = 0;

	return len;
}

