dev_com_test.c

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/* COMx device */

#include "fb.h"

int fb_DevComTestProtocolEx
        (
                FB_FILE *handle,
                const char *filename,
                size_t filename_len,
                size_t *pPort
        )
{
    char ch;
    size_t i, port;

    if( pPort ) {
        *pPort = 0;
    }

    if( strncasecmp(filename, "SER:", 4)==0 ) {
        if( pPort )
            *pPort = 1;
        return TRUE;
    }

    if( filename_len < 4 )
        return FALSE;
    
    if( strncasecmp(filename, "COM", 3) != 0 )
        return strchr( filename, ':' ) != NULL;

    port = 0;
    i = 3;
    ch = filename[i];
    while( ch>='0' && ch<='9' ) {
        port = port * 10 + (ch - '0');
        ch = filename[++i];
    }

                /* removed to allow for open com "COM:"
    if( port==0 )
        return FALSE;
                */
    if( ch!=':' )
        return FALSE;

    if( pPort )
        *pPort = port;

    return TRUE;
}

int fb_DevComTestProtocol
        (
                FB_FILE *handle,
                const char *filename,
                size_t filename_len
        )
{
    return fb_DevComTestProtocolEx( handle, filename, filename_len, NULL );
}