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Checks that the port is open before writing to its buffer.

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svn path=/trunk/externals/iem/comport/; revision=13221
This commit is contained in:
Martin Peach 2010-03-17 20:39:20 +00:00
parent ad24c79d3e
commit 6609bc6fbd
1 changed files with 14 additions and 2 deletions
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16
comport/comport.c
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@ -1139,20 +1139,32 @@ endsendevent:
static int write_serial(t_comport *x, unsigned char serial_byte)
{
if(x->x_outbuf_wr_index < x->x_outbuf_len)
if(x->comhandle == INVALID_HANDLE_VALUE)
{
post ("[comport]: Serial port is not open");
return 0;
}
else if(x->x_outbuf_wr_index < x->x_outbuf_len)
{
x->x_outbuf[x->x_outbuf_wr_index++] = serial_byte;
return 1;
}
/* handle overrun error */
else return 0;
post ("[comport]: buffer is full");
return 0;
}
static int write_serials(t_comport *x, unsigned char *serial_buf, int buf_length)
{
int i;
if(x->comhandle == INVALID_HANDLE_VALUE)
{
post ("[comport]: Serial port is not open");
return 0;
}
for (i = 0; ((i < buf_length) && (x->x_outbuf_wr_index < x->x_outbuf_len)); ++x->x_outbuf_wr_index, ++i)
x->x_outbuf[x->x_outbuf_wr_index] = serial_buf[i];
if (i != buf_length) post ("[comport]: buffer is full");
return i;
}