105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/*
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* hurricanegen.c
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* Original author unknown
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* Modified by Sam Kauffman - University of Virginia
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*
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* Generates datasets of "hurricanes" to be used by Rodinia's Nearest Neighbor (nn)
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* Also generates lists of the files in the dataset. These lists are passed to nn.
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*
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* Usage: hurricanegen <num_hurricanes> <num_files>
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* The number of hurricanes should be a multiple of both 1024 and the number of files.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <time.h>
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// 641986 gets you ~30 MB of data
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int main(int argc, char **argv)
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{
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FILE *fp;
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int i = 0, total_canes = 0, canes = 0, num_files = 0, j = 0;
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int year, month, date, hour, num, speed, press;
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float lat, lon;
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int hours[4] =
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{ 0, 6, 12, 18 };
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char *name, fname[30];
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char names[21][10] =
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{ "ALBERTO", "BERYL", "CHRIS", "DEBBY", "ERNESTO", "FLORENCE", "GORDON",
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"HELENE", "ISAAC", "JOYCE", "KIRK", "LESLIE", "MICHAEL", "NADINE",
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"OSCAR", "PATTY", "RAFAEL", "SANDY", "TONY", "VALERIE", "WILLIAM" };
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if (argc < 3)
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{
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fprintf(stderr, "Error: Enter a number of hurricanes and a number of files.\n");
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fprintf(stderr, "The number of hurricanes should be a multiple of both 1024\nand the number of files.\n");
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exit(0);
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}
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total_canes = atoi(argv[1]);
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num_files = atoi(argv[2]);
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total_canes = ((total_canes+1023)/1024) * 1024; // round up to multiple of 1024
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canes = (total_canes + num_files - 1) / num_files; // round up (ceiling division)
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total_canes = canes * num_files;
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srand(time(NULL));
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for (j = 0; j < num_files; j++)
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{
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if (num_files == 1)
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sprintf(fname, "cane%dk.db", total_canes / 1024);
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else
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sprintf(fname, "cane%dk_%d_%d.db", total_canes / 1024, num_files, j);
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if ((fp = fopen(fname, "w")) == NULL)
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{
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fprintf(stderr, "Failed to open output file '%s'!\n", fname);
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return -1;
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}
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for (i = 0; i < canes; i++)
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{
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year = 1950 + rand() % 55;
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month = 1 + rand() % 12;
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date = 1 + rand() % 28;
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hour = hours[rand() % 4];
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num = 1 + rand() % 28;
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name = names[rand() % 21];
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lat = ((float) (7 + rand() % 63))
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+ ((float) rand() / (float) 0x7fffffff);
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lon = ((float) (rand() % 358))
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+ ((float) rand() / (float) 0x7fffffff);
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speed = 10 + rand() % 155;
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press = rand() % 900;
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fprintf(fp, "%4d %2d %2d %2d %2d %-9s %5.1f %5.1f %4d %4d\n",
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year, month, date, hour, num, name, lat, lon, speed, press);
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}
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fclose(fp);
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}
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printf("Generated %d hurricanes in %d file(s).\n", total_canes, num_files);
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if (num_files == 1)
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{
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sprintf(fname, "list%dk.txt", total_canes / 1024);
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fp = fopen(fname, "w");
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fprintf(fp, "../../data/nn/cane%dk.db\n", total_canes / 1024);
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}
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else
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{
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sprintf(fname, "list%dk_%d.txt", total_canes / 1024, num_files);
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fp = fopen(fname, "w");
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for (int i = 0; i < num_files; i++)
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fprintf(fp, "../../data/nn/cane%dk_%d_%d.db\n", total_canes / 1024, num_files, i);
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}
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fclose(fp);
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printf( "File list written to %s.\n", fname );
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return 0;
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} |