diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..2b2b81e
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,7 @@
+[*.c]
+indent_style = space
+indent_size = 4
+
+[*.h]
+indent_style = space
+indent_size = 4
diff --git a/src/iscidraddr4.c b/src/iscidraddr4.c
index 806b6ee..6ec6f49 100644
--- a/src/iscidraddr4.c
+++ b/src/iscidraddr4.c
@@ -9,37 +9,37 @@ static bool in_range(char buf[4], int min, int max);
 bool
 iscidraddr4(const char *str)
 {
-  size_t offset = 0;
-  size_t len = (str == NULL ? 0 : strnlen(str, 16));
+    size_t offset = 0;
+    size_t len = (str == NULL ? 0 : strnlen(str, 16));
 
-  for(size_t i = 0; i < len; i++) {
-    if (str[i] == '/') {
-      offset = i;
-      break;
+    for(size_t i = 0; i < len; i++) {
+        if (str[i] == '/') {
+            offset = i;
+            break;
+        }
+    }
+    if (offset == 0) {
+        return isinetaddr4(str);
+    } else {
+        char addr[offset], cidr[3];
+        char *c = (char*)&str[offset + 1];
+        memcpy(addr, str, offset);
+        memcpy(cidr, c, 3);
+        addr[offset] = '\0';
+        return isinetaddr4(addr) && in_range(cidr, 0, 32);
     }
-  }
-  if (offset == 0) {
-    return isinetaddr4(str);
-  } else {
-    char addr[offset], cidr[3];
-    char *c = (char*)&str[offset + 1];
-    memcpy(addr, str, offset);
-    memcpy(cidr, c, 3);
-    addr[offset] = '\0';
-    return isinetaddr4(addr) && in_range(cidr, 0, 32);
-  }
 }
 
 static bool
 in_range(char buf[4], int min, int max)
 {
-  char *err;
-  long r;
-  errno = 0;
-  if (strnlen(buf, 1) == 0) {
-    return false;
-  } else {
-    r = strtol(buf, &err, 10);
-    return *err == '\0' && errno == 0 && (r >= min && r <= max);
-  }
+    char *err;
+    long r;
+    errno = 0;
+    if (strnlen(buf, 1) == 0) {
+        return false;
+    } else {
+        r = strtol(buf, &err, 10);
+        return *err == '\0' && errno == 0 && (r >= min && r <= max);
+    }
 }
diff --git a/src/isinetaddr4.c b/src/isinetaddr4.c
index 0a5e092..13de124 100644
--- a/src/isinetaddr4.c
+++ b/src/isinetaddr4.c
@@ -14,40 +14,40 @@ static bool within_range(char buf[MAX_BUFLEN]);
 bool
 isinetaddr4(const char *str)
 {
-  char buf[MAX_BUFLEN + 1];
-  int digits = 0, octets = 1, buflen = 0;
-  size_t len = (str == NULL ? 0 : strnlen(str, MAX_STRLEN));
+    char buf[MAX_BUFLEN + 1];
+    int digits = 0, octets = 1, buflen = 0;
+    size_t len = (str == NULL ? 0 : strnlen(str, MAX_STRLEN));
 
-  for (size_t i = 0; i < len; i++) {
-    if (str[i] == SEP) {
-      if (octets == MAX_OCTETS || buflen == 0) {
-        return false;
-      } else {
-        buflen = 0;
-      }
-    } else if (isdigit(str[i])) {
-      if (buflen == MAX_BUFLEN) {
-        return false;
-      } else {
-        buf[buflen++] = str[i];
-        buf[buflen] = '\0';
-        digits++;
-        if (!within_range(buf)) {
-          return false;
-        } else if (i > 0 && str[i-1] == SEP) {
-          octets++;
+    for (size_t i = 0; i < len; i++) {
+        if (str[i] == SEP) {
+            if (octets == MAX_OCTETS || buflen == 0) {
+                return false;
+            } else {
+                buflen = 0;
+            }
+        } else if (isdigit(str[i])) {
+            if (buflen == MAX_BUFLEN) {
+                return false;
+            } else {
+                buf[buflen++] = str[i];
+                buf[buflen] = '\0';
+                digits++;
+                if (!within_range(buf)) {
+                    return false;
+                } else if (i > 0 && str[i-1] == SEP) {
+                    octets++;
+                }
+            }
+        } else {
+            return false;
         }
-      }
-    } else {
-      return false;
     }
-  }
-  return octets == MAX_OCTETS && digits <= MAX_DIGITLEN;
+    return octets == MAX_OCTETS && digits <= MAX_DIGITLEN;
 }
 
 static bool
 within_range(char buf[MAX_BUFLEN])
 {
-  int n = atoi(buf);
-  return n >= 0 && n <= 255;
+    int n = atoi(buf);
+    return n >= 0 && n <= 255;
 }
diff --git a/src/isinetaddr6.c b/src/isinetaddr6.c
index 036b48d..0a0a968 100644
--- a/src/isinetaddr6.c
+++ b/src/isinetaddr6.c
@@ -17,87 +17,87 @@ static size_t get_offset(char *tail);
 bool
 isinetaddr6(const char *str)
 {
-  int hextets = 1, digitlen = 0, hexdigits = 0;
-  size_t len = (str == NULL ? 0 : strnlen(str, MAX_STRLEN));
+    int hextets = 1, digitlen = 0, hexdigits = 0;
+    size_t len = (str == NULL ? 0 : strnlen(str, MAX_STRLEN));
 
-  if (len == 0) {
-    return false;
-  } else if (strncasecmp(str, "::ffff", 6) == 0) {
-    return isinetaddr4(&str[7]);
-  }
-  for (size_t i = 0; i < len; i++) {
-    if (has_consecutive_chars(&str[i], SEP, 3)) {
-      return false;
-    } else if (has_consecutive_chars(&str[i], SEP, 2)) {
-      if (i == 0 && isinetaddr4(&str[3])) {
-        return true;
-      } else {
-        char new_str[MAX_STRLEN];
-        return isinetaddr6(expand(str, len, new_str, i));
-      }
-    } else if (str[i] == SEP) {
-      digitlen = 0;
-    } else if (isxdigit(str[i])) {
-      digitlen++;
-      hexdigits++;
-      if (digitlen > MAX_DIGITLEN) {
+    if (len == 0) {
         return false;
-      } else if (str[i-1] == SEP) {
-        hextets++;
-      }
-    } else {
-      return false;
+    } else if (strncasecmp(str, "::ffff", 6) == 0) {
+        return isinetaddr4(&str[7]);
     }
-  }
-  return hextets == MAX_HEXTETS && hexdigits <= MAX_HEXDIGITS;
+    for (size_t i = 0; i < len; i++) {
+        if (has_consecutive_chars(&str[i], SEP, 3)) {
+            return false;
+        } else if (has_consecutive_chars(&str[i], SEP, 2)) {
+            if (i == 0 && isinetaddr4(&str[3])) {
+                return true;
+            } else {
+                char new_str[MAX_STRLEN];
+                return isinetaddr6(expand(str, len, new_str, i));
+            }
+        } else if (str[i] == SEP) {
+            digitlen = 0;
+        } else if (isxdigit(str[i])) {
+            digitlen++;
+            hexdigits++;
+            if (digitlen > MAX_DIGITLEN) {
+                return false;
+            } else if (str[i-1] == SEP) {
+                hextets++;
+            }
+        } else {
+            return false;
+        }
+    }
+    return hextets == MAX_HEXTETS && hexdigits <= MAX_HEXDIGITS;
 }
 
 static bool
 has_consecutive_chars(const char *str, char c, int n)
 {
-  for (int i = 0; i < n; i++) {
-    if (*str++ != c) {
-      return 0;
+    for (int i = 0; i < n; i++) {
+        if (*str++ != c) {
+            return 0;
+        }
     }
-  }
-  return 1;
+    return 1;
 }
 
 static char*
 expand(const char *str, size_t strlen, char *new_str, size_t headlen)
 {
-  char *ptr = new_str;
-  char *tail = (char*) &str[headlen + 2];
-  size_t taillen = (strlen - headlen) - 2;
-  size_t bodylen = MAX_STRLEN - taillen;
-  size_t i = headlen + 2;
-  size_t j = headlen;
-  size_t offset = get_offset(tail);
+    char *ptr = new_str;
+    char *tail = (char*) &str[headlen + 2];
+    size_t taillen = (strlen - headlen) - 2;
+    size_t bodylen = MAX_STRLEN - taillen;
+    size_t i = headlen + 2;
+    size_t j = headlen;
+    size_t offset = get_offset(tail);
 
-  while (i++ < strlen) {
-    if (has_consecutive_chars(&str[i], SEP, 2)) {
-      return NULL;
+    while (i++ < strlen) {
+        if (has_consecutive_chars(&str[i], SEP, 2)) {
+            return NULL;
+        }
     }
-  }
-  memcpy(ptr, &str[0], headlen);
-  ptr += headlen;
-  while (++j < bodylen-offset) {
-    *ptr++ = j % 5 == 0 ? ':' : '0';
-  }
-  memcpy(ptr, tail, taillen);
-  return new_str;
+    memcpy(ptr, &str[0], headlen);
+    ptr += headlen;
+    while (++j < bodylen-offset) {
+        *ptr++ = j % 5 == 0 ? ':' : '0';
+    }
+    memcpy(ptr, tail, taillen);
+    return new_str;
 }
 
 static size_t
 get_offset(char *tail)
 {
-  size_t offset = 0;
-  while (*tail++ != SEP) {
-    offset++;
-    if (*tail == '\0' || offset == 4) {
-      offset = 0;
-      break;
+    size_t offset = 0;
+    while (*tail++ != SEP) {
+        offset++;
+        if (*tail == '\0' || offset == 4) {
+            offset = 0;
+            break;
+        }
     }
-  }
-  return offset;
+    return offset;
 }