matt/src/util.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "util.h"

bool startswith(char *str, char *sub) {
  size_t strl = strlen(str);
  size_t subl = strlen(sub);

  if (subl > strl)
    return false;

  return strncmp(sub, str, subl) == 0;
}

void size_to_human(char *buf, long size) {
  char *suffix[] = {"B", "KB", "MB", "GB", "TB"};
  char  length   = sizeof(suffix) / sizeof(suffix[0]);

  int    i       = 0;
  double cursize = size;

  if (size > 1024) {
    for (i = 0; (size / 1024) > 0 && i < length - 1; i++, size /= 1024)
      cursize = size / 1024.0;
  }

  sprintf(buf, "%.02lf%s", cursize, suffix[i]);
}