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#include <stdlib.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>
#include <stdlib.h>

#include "memcached.h"

bool safe_strtoull(const char *str, unsigned long long *out) {
  assert(out != NULL);
  errno = 0;
  *out = 0;
  char *endptr;
  unsigned long long ull = strtoull(str, &endptr, 10);
  if (errno == ERANGE)
    return false;
  if (isspace(*endptr) || (*endptr == '\0' && endptr != str)) {
    if ((long long) ull < 0) {
      // only check for negative signs in the uncommon case when the unsigned
      // number is so big that it's negative as a signed number.
      if (strchr(str, '-') != NULL) {
        return false;
      }
    }
    *out = ull;
    return true;
  }
  return false;
}

bool safe_strtoll(const char *str, long long *out) {
  assert(out != NULL);
  errno = 0;
  *out = 0;
  char *endptr;
  long long ll = strtoll(str, &endptr, 10);
  if (errno == ERANGE)
    return false;
  if (isspace(*endptr) || (*endptr == '\0' && endptr != str)) {
    *out = ll;
    return true;
  }
  return false;
}