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/*

 * mkdata.c -- generate test data files for file system test

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define BLOCK_SIZE      4096

int main(int argc, char *argv[]) {

  int j, i, k, m;

  char buf[80];

  unsigned char block[BLOCK_SIZE];

  FILE *dataFile;

  if (argc != 1) {

    printf("Usage: %s\n", argv[0]);

    return 1;

  }

  for (j = 0; j < 12; j++) {

    i = 1 << j;

    sprintf(buf, "0x%06X", i);

    printf("%s\n", buf);

    dataFile = fopen(buf, "wb");

    if (dataFile == NULL) {

      printf("Error: cannot open data file '%s'\n", buf);

      return 1;

    }

    for (m = 0; m < i; m++) {

      for (k = 0; k < BLOCK_SIZE; k += 4) {

        block[k + 0] = m >> 24;

        block[k + 1] = m >> 16;

        block[k + 2] = m >>  8;

        block[k + 3] = m >>  0;

      }

      if (fwrite(block, 1, BLOCK_SIZE, dataFile) != BLOCK_SIZE) {

        printf("Error: cannot write data file '%s'\n", buf);

        return 1;

      }

    }

    fclose(dataFile);

  }

  return 0;

}