view target-utils/simtest/poll.c @ 965:2969032bdfac

fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing The only 100% safe way to pass a NULL pointer as a function argument in K&R C is to cast 0 to a pointer type; failing to do so may cause mysterious bugs (invalid stack frames or garbage in argument registers) on 64-bit machines. This issue has already been fixed in most of FC host tools, but I just found some missed spots: passing of NULL UDH to PDU encoding functions in fcup-smsend[mult] in the case of single (not concatenated) SMS.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 01 Sep 2023 07:33:51 +0000
parents d96ea6ae6aa5
children
line wrap: on
line source

#include <sys/types.h>
#include <strings.h>
#include "types.h"
#include "simregs.h"

extern int serial_in_poll();

int enable_poll;

void
poll_sim_rx()
{
	u32 drx;

	if (SIMREGS.stat & SIM_STAT_FEMPTY)
		return;
	drx = SIMREGS.drx & 0xFF;
	printf("%02X ", drx);
}

int
mygetchar()
{
	register int c;

	do {
		if (enable_poll)
			poll_sim_rx();
		c = serial_in_poll();
	}
	while (c < 0);
	return c;
}

void
cmd_poll(argbulk)
	char *argbulk;
{
	char *argv[2];

	if (parse_args(argbulk, 1, 1, argv, 0) < 0)
		return;
	if (!strcmp(argv[0], "on"))
		enable_poll = 1;
	else if (!strcmp(argv[0], "off"))
		enable_poll = 0;
	else
		printf("ERROR: \"on\" or \"off\" argument expected\n");
}