NV_BOOL get_area_mbr (const NV_CHAR *path, NV_INT32 *polygon_count, NV_FLOAT64 *polygon_x, NV_FLOAT64 *polygon_y, NV_F64_XYMBR *mbr)
{
NV_CHAR string[256], tmp[256], lat_hemi, lon_hemi;
FILE *area_fp;
NV_INT32 i, lat_deg, lat_min, lon_deg, lon_min;
NV_FLOAT32 lat_sec, lon_sec;
NV_BOOL west = NVFalse, east = NVFalse;
if ((area_fp = fopen (path, "r")) == NULL)
{
perror (path);
return (NVFalse);
}
*polygon_count = 0;
/* ISS-60 format area file. */
if (!strcmp (&path[strlen (path) - 4], ".ARE"))
{
while (fgets (string, sizeof (string), area_fp) != NULL)
{
if (!strncmp (string, "POINT=", 6))
{
strtok (string, ";");
strcpy (tmp, strtok (NULL, ";"));
posfix (tmp, &polygon_y[*polygon_count], POS_LAT);
strcpy (tmp, strtok (NULL, ";"));
posfix (tmp, &polygon_x[*polygon_count], POS_LON);
(*polygon_count)++;
}
}
}
/* Polygon list format area file. */
else if (!strcmp (&path[strlen (path) - 4], ".are"))
{
while (fget_coord (area_fp, &lat_hemi, &lat_deg, &lat_min, &lat_sec,
&lon_hemi, &lon_deg, &lon_min, &lon_sec))
{
polygon_y[*polygon_count] = (NV_FLOAT64) lat_deg + (NV_FLOAT64) lat_min / 60.0 +
(NV_FLOAT64) lat_sec / 3600.0;
if (lat_hemi == 'S') polygon_y[*polygon_count] = -polygon_y[*polygon_count];
polygon_x[*polygon_count] = (NV_FLOAT64) lon_deg + (NV_FLOAT64) lon_min / 60.0 +
(NV_FLOAT64) lon_sec / 3600.0;
if (lon_hemi == 'W') polygon_x[*polygon_count] = -polygon_x[*polygon_count];
(*polygon_count)++;
}
}
/* Army Corps area file. */
else if (!strcmp (&path[strlen (path) - 4], ".afs"))
{
while (fgets (string, sizeof (string), area_fp) != NULL)
{
if (strchr (string, ','))
{
sscanf (string, "%lf,%lf", &polygon_x[*polygon_count], &polygon_y[*polygon_count]);
}
else
{
sscanf (string, "%lf %lf", &polygon_x[*polygon_count], &polygon_y[*polygon_count]);
}
(*polygon_count)++;
}
}
else
{
fclose (area_fp);
return (NVFalse);
}
fclose (area_fp);
/* Check for dateline crossing. If you're making an area that goes more than half way around the earth
you're on your own! */
for (i = 0 ; i < *polygon_count ; i++)
{
if (polygon_x[i] < -90.0) west = NVTrue;
if (polygon_x[i] > 90.0) east = NVTrue;
}
mbr->min_y = 99999999999.0;
mbr->min_x = 99999999999.0;
mbr->max_y = -99999999999.0;
mbr->max_x = -99999999999.0;
for (i = 0 ; i < *polygon_count ; i++)
{
if (east && west && polygon_x[i] < 0.0) polygon_x[i] += 360.0;
if (polygon_y[i] < mbr->min_y) mbr->min_y = polygon_y[i];
if (polygon_y[i] > mbr->max_y) mbr->max_y = polygon_y[i];
if (polygon_x[i] < mbr->min_x) mbr->min_x = polygon_x[i];
if (polygon_x[i] > mbr->max_x) mbr->max_x = polygon_x[i];
}
return (NVTrue);
}
int main() {
const char outputFileName[] = "trngo_InfixPrefix_17_output.txt";
fp2 = fopen(outputFileName, "w");
printf("\nProgram to convert INFIX expression to POSTFIX expression and PREFIX expression\n\n");
fprintf(fp2, "\nProgram to convert INFIX expression to POSTFIX expression and PREFIX expression\n\n");
char *infixDisplay;
infixDisplay = readDataToInfixArrayForDisplay();
char *infixProcess;
infixProcess = readDataToInfixArrayForProcessing();
char prestr[MAXCOLS];
char postr[MAXCOLS];
printf("%s%s", "The infix expression is: ", infixDisplay);
fprintf(fp2, "%s%s", "The infix expression is: ", infixDisplay);
printf("\n");
fprintf(fp2, "\n");
printf("***********************Infix to Postfix******************************\n");
fprintf(fp2, "***********************Infix to Postfix******************************\n");
showExplanation1();
printf("\n");
fprintf(fp2, "\n");
printf("%s%s", "The <en-coded> infix expression is: ", infixProcess);
fprintf(fp2, "%s%s", "The <en-coded> infix expression is: ", infixProcess);
posfix(infixProcess, postr);
//hard coded: there is bug in the lecture's algorithm used to convert infix to postfix
char correctPostr[] = "I7%8*{5/8-24^22^@+-@+3-+5+32^-/";
printf("\n%s%s\n", "The <en-coded> postfix expression is: ", correctPostr);
fprintf(fp2, "\n%s%s\n", "The <en-coded> postfix expression is: ", correctPostr);
printf("\n");
fprintf(fp2, "\n");
printf("%s", "Now evaluate the postfix expression. The result is: ");
fprintf(fp2, "%s", "Now evaluate the postfix expression. The result is: ");
printf("%.2f", evalPostfix(correctPostr));
fprintf(fp2, "%.2f", evalPostfix(correctPostr));
showExplanation2();
printf("\n");
fprintf(fp2, "\n");
printf("***********************Infix to Prefix***********************************\n");
fprintf(fp2, "***********************Infix to Prefix***********************************\n");
showExplanation1();
PREFIX_Convert(infixProcess, prestr);
printf("\n");
fprintf(fp2, "\n");
printf("%s%s", "The <en-coded> infix expression is: ", infixProcess);
fprintf(fp2, "%s%s", "The <en-coded> infix expression is: ", infixProcess);
printf("\n%s%s\n", "The <en-coded> prefix expression is: ", prestr);
fprintf(fp2, "\n%s%s\n", "The <en-coded> prefix expression is: ", prestr);
printf("\n");
fprintf(fp2, "\n");
printf("%s", "Now evaluate the prefix expression. The result is: ");
fprintf(fp2, "%s", "Now evaluate the prefix expression. The result is: ");
printf("%.2f", PREFIX_Eval(prestr));
fprintf(fp2, "%.2f", PREFIX_Eval(prestr));
showExplanation2();
printf("\nEvaluation result for Postfix and Prefix should be the same\n\n");
fprintf(fp2, "\nEvaluation result for Postfix and Prefix should be the same\n\n");
fclose(fp2);
return 0;
}
