GPRMC string is not showing after extracting the data - C - c

Question

Im working around PIC with GPS module. My GPS modules send NMEA data
$GPRMC,000036.799,V,,,,,0.00,0.00,060180,,,N*40
$GPVTG,0.00,T,,M,0.00,N,0.00,K,N*32
$GPGGA,000036.799,,,,,0,0,,,M,,M,,*4A
$GPGSA,A,1,,,,,,,,,,,,,,,*1E
$GPGSV,1,1,00*79
$GPGLL,,,,,000036.799,V,N*78
$GPTXT,01,01,02,ANTSTATUS=OPEN*2B
Here my intention is to extract "GPRMC" data string from the above. I think i've sucessfully took it off the "GPRMC", but the problem is the exracted data string doesnt have GPRMC string. here is the screenshot of my hyperterminal window
Here is my code:
while (1)
{
//memset(gpsdata,0,sizeof(gpsdata));
char c = uartrec2();
if (c == '$')
{
char c1 = uartrec2();
if (c1 == 'G')
{
char c2 = uartrec2();
if (c2 == 'P')
{
char c3 = uartrec2();
if (c3 == 'R')
{
char c4 = uartrec2();
if (c4 == 'M')
{
char c5 = uartrec2();
if (c5 == 'C')
{
for (i = 0 ; i < 100 ; i++)
{
gpsdata[i] = uartrec2();
/* while (gpsdata[i] == '\r' || gpsdata[i] == '\n')
{
break;
} */
if (gpsdata[i] == '\r' ) // Checking for '\r'
{
gpsdata[i] = '\0';
}
}
}
}
}
else
{
printf("Bad GPS data");
}
}
}
}
uart_str(gpsdata);
uart_str("\r\n");
}

Answer 1

The first thing you should do is try to figure out a better way to write this program, this could be
int done;
done = 0;
while (done == 0)
{
const char *string;
int valid;
valid = 1;
string = "$GPRMC";
while ((*string != '\0') && ((valid = (uartec2() == *string)) != 0))
string++;
if (valid != 0)
{
for (int i = 0 ; i < 100 ; ++i)
{
gpsdata[i] = uartec2();
if (gpsdata[i] != '\r')
continue;
gpsdata[i] = '\0';
}
uart_str(gpsdata);
uart_str("\r\n");
}
}

Answer 2

How about just adding it since you know there was it?
if (c5 == 'C')
{
gpsdata[0] = '$';
gpsdata[1] = 'G';
gpsdata[2] = 'P';
gpsdata[3] = 'R';
gpsdata[4] = 'M';
gpsdata[5] = 'C';
for (i = 6 ; i < 100 ; i++)
{
gpsdata[i] = uartrec2();
/* while (gpsdata[i] == '\r' || gpsdata[i] == '\n')
{
break;
} */
if (gpsdata[i] == '\r' ) // Checking for '\r'
{
gpsdata[i] = '\0';
}
}
}