/*====================================================================*
*
*   Copyright (c) 2013 Qualcomm Atheros, Inc.
*
*   All rights reserved.
*
*====================================================================*/

/*====================================================================*
 *
 *   ttysend.c
 *
 *   Contributor(s):
 *	Nathaniel Houghton <nhoughto@qca.qualcomm.com>
 *
 *--------------------------------------------------------------------*/

/*====================================================================*
 *   system header files;  
 *--------------------------------------------------------------------*/

#include <sys/time.h>
#include <sys/types.h>

#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <termios.h>

/*====================================================================*
 *   custom header files;  
 *--------------------------------------------------------------------*/

#include "../tools/error.h"
#include "../tools/files.h"
#include "../tools/putoptv.h"
#include "../tools/getoptv.h"
#include "../tools/number.h"
#include "../serial/serial.h"

/*====================================================================*
 *   custom source files;  
 *--------------------------------------------------------------------*/

#ifndef MAKEFILE
#include "../tools/getoptv.c"
#include "../tools/putoptv.c"
#include "../tools/version.c"
#include "../tools/uintspec.c"
#include "../tools/todigit.c"
#include "../tools/error.c"
#endif

#ifndef MAKEFILE
#include "../serial/baudrate.c"
#endif

/*====================================================================*
 *   program constants;    
 *--------------------------------------------------------------------*/

#define SERIAL_PORT "/dev/ttyS0"

void ttysend (int ifd, int ofd, size_t time, size_t chunk_size) 

{ 
	char * buf; 
	char * p; 
	ssize_t r; 
	ssize_t w; 
	struct timeval tv_start, 
	tv_now, 
	tv_result; 
	buf = malloc (chunk_size); 
	if (buf == NULL)
	{
		error (1, errno, "could not allocate memory"); 
	}
	if (ifd == - 1) 
	{ 
		unsigned i; 
		for (i = 0; i < chunk_size; ++ i)
		{
			buf [i] = i % 256; 
		}
	} 
	if (gettimeofday (& tv_start, NULL) == - 1)
	{
		error (1, errno, "could not get time"); 
	}
	do 
	{ 
		if (ifd == - 1) 
		{ 
			r = chunk_size; 
		} 
		else 
		{ 
			r = read (ifd, buf, chunk_size); 
			if (r == - 1)
			{
				error (1, errno, "could not read"); 
			}
			if (r == 0) 
			{ 
				free (buf); 
				return; 
			} 
		} 
		p = buf; 
		while (r) 
		{ 
			w = write (ofd, p, r); 
			if (w == - 1)
			{
				error (1, errno, "could not write"); 
			}
			p += w; 
			r -= w; 
		} 
		if (gettimeofday (& tv_now, NULL) == - 1)
		{
			error (1, errno, "could not get time"); 
		}
		timersub (& tv_now, & tv_start, & tv_result); 
	} 
	while (tv_result.tv_sec < (signed) (time)); 
	free (buf); 
} 

int main (int argc, char const * argv []) 

{ 
	static char const * optv [] = 
	{ 
		"f:l:s:t:qv", 
		"", 
		"Serial Line Rate Tester", 
		"f f\tsend file (f)", 
		"l f\tserial port is (f) [" SERIAL_PORT "]", 
		"s n\tport speed [ 115200 ]", 
		"t n\ttransmit for (n) seconds [ 15 ]", 
		"q\tquiet mode", 
		"v\tverbose mode", 
		(char const *) (0)
	}; 
	int fd; 
	signed c; 
	optind = 1; 
	char const * line = SERIAL_PORT; 
	struct _file_ file = 
	{ 
		- 1, 
		NULL
	}; 
	speed_t speed = B115200; 
	size_t time = 15; 
	size_t chunk_size = 256; 
	struct termios termios; 
	while (~ (c = getoptv (argc, argv, optv))) 
	{ 
		switch ((char) (c)) 
		{ 
		case 'f': 
			file.name = optarg; 
			if (! strcmp (file.name, "-")) file.file = STDIN_FILENO; 
			else 
			{ 
				file.file = open (file.name, O_BINARY | O_RDONLY); 
				if (file.file == - 1)
				{
					error (1, errno, "could not open %s", file.name); 
				}
			} 
			break; 
		case 'l': 
			line = optarg; 
			break; 
		case 's': 
			if (baudrate (uintspec (optarg, 0, UINT_MAX), & speed))
			{
				error (1, 0, "could not set baud rate"); 
			}
			break; 
		case 't': 
			time = uintspec (optarg, 0, SIZE_MAX); 
			break; 
		default: 
			break; 
		} 
	} 
	argc -= optind; 
	argv += optind; 
	fd = open (line, O_RDWR | O_NONBLOCK | O_NOCTTY); 
	if (fd == - 1)
	{
		error (1, errno, "could not open %s", line); 
	}
	if (fcntl(fd, F_SETFL, 0) == -1)
	{
		error (1, errno, "failed to set tty flags"); 
	}
	if (tcgetattr (fd, & termios) == - 1)
	{
		error (1, errno, "could not get tty attributes"); 
	}
	cfmakeraw (& termios); 
	termios.c_cflag = CS8 | CREAD | CLOCAL;
	if (cfsetspeed (& termios, speed) == - 1)
	{
		error (1, errno, "could not set tty speed"); 
	}
	if (tcsetattr (fd, TCSANOW, & termios) == - 1)
	{
		error (1, errno, "could not set tty attributes"); 
	}
	ttysend (file.file, fd, time, chunk_size); 
	close (fd); 
	return (0); 
}