diff --git a/.ccls b/.ccls
index 7b5bd08..96a5d25 100644
--- a/.ccls
+++ b/.ccls
@@ -2,4 +2,5 @@ gcc
 -Wall
 -Wextra
 -Werror=implicit
+-pedantic
 -Ilib/inc
diff --git a/lib/cstr.c b/lib/cstr.c
index 7287d62..5bdf925 100644
--- a/lib/cstr.c
+++ b/lib/cstr.c
@@ -15,7 +15,7 @@
  *          original string.
  */
 char *
-strtrim (char *str)
+strtrim (char str[static 1])
 {
     strtrimr (str);
     return strtriml (str);
@@ -32,7 +32,7 @@ strtrim (char *str)
  *          original string.
  */
 char *
-strtriml (char *str)
+strtriml (char str[static 1])
 {
     while (*str && isspace (*str))
         str++;
@@ -50,7 +50,7 @@ strtriml (char *str)
  * @return  the new string length.
  */
 size_t
-strtrimr (char *str)
+strtrimr (char str[static 1])
 {
     size_t len, i;
 
@@ -71,7 +71,7 @@ strtrimr (char *str)
  * @return  the amount of occurances of `c` in `str`
  */
 size_t
-strcount (const char *str, char c)
+strcount (const char str[static 1], char c)
 {
     size_t count;
 
@@ -89,7 +89,7 @@ strcount (const char *str, char c)
  * @param   str: the string to convert
  */
 void
-strdowncase (char *str)
+strdowncase (char str[static 1])
 {
     while (*str)
     {
@@ -105,7 +105,7 @@ strdowncase (char *str)
  * @param   str: the string to convert
  */
 void
-strupcase (char *str)
+strupcase (char str[static 1])
 {
     while (*str)
     {
@@ -125,7 +125,7 @@ strupcase (char *str)
  *          if other characters are present.
  */
 bool
-strisblank (const char *str)
+strisblank (const char str[static 1])
 {
     while (*str)
         if (!isspace (*str++))
diff --git a/lib/debug.c b/lib/debug.c
index ac4b4fa..931b8d9 100644
--- a/lib/debug.c
+++ b/lib/debug.c
@@ -25,7 +25,7 @@ debug_malloc (size_t size, const char *file, size_t line)
 
     ptr = malloc (size);
     if (ptr == NULL)
-        log_print_fl (LOG_LEVEL_DEBUG, file, line, "malloc of size %zu \e[31mreturned null\e[0m\n", size);
+        log_print_fl (LOG_LEVEL_DEBUG, file, line, "malloc of size %zu \x1b[31mreturned null\x1b[0m\n", size);
     else
         log_print_fl (LOG_LEVEL_DEBUG, file, line, "malloc of size %zu to ptr %p\n", size, ptr);
 
@@ -56,7 +56,7 @@ debug_realloc (void *ptr, size_t size, const char *file, size_t line)
     old_ptr = (uintptr_t) ptr;
     new_ptr = realloc (ptr, size);
     if (new_ptr == NULL && size != 0)
-        log_print_fl (LOG_LEVEL_DEBUG, file, line, "realloc of ptr %#" PRIxPTR " to size %zu \e[31mreturned null\e[0m\n", old_ptr, size);
+        log_print_fl (LOG_LEVEL_DEBUG, file, line, "realloc of ptr %#" PRIxPTR " to size %zu \x1b[31mreturned null\x1b[0m\n", old_ptr, size);
     else if (new_ptr == ptr)
         log_print_fl (LOG_LEVEL_DEBUG, file, line, "realloc of ptr %p to size %zu\n", new_ptr, size);
     else
diff --git a/lib/inc/cstr.h b/lib/inc/cstr.h
index 05a8a4d..e2b496b 100644
--- a/lib/inc/cstr.h
+++ b/lib/inc/cstr.h
@@ -5,12 +5,12 @@
 #include <stddef.h>
 #include <sys/types.h>
 
-char *strtrim (char *str); /* trim whitespace of a cstring (both beginning and end) */
-char *strtriml (char *str); /* trim whitespace of a cstring on the left (beginning of string) */
-size_t strtrimr (char *str); /* trim whitespace of a cstring on the right (end of string) */
-size_t strcount (const char *str, char c); /* count number of occurances of a character within a string */
-void strdowncase (char *str); /* transform all uppercase letters of a string into lowercase letters */
-void strupcase (char *str); /* transform all lowercase letters of a string into uppercase letters */
-bool strisblank (const char *str); /* check if a string only consists of whitespace characters */
+char *strtrim (char str[static 1]); /* trim whitespace of a cstring (both beginning and end) */
+char *strtriml (char str[static 1]); /* trim whitespace of a cstring on the left (beginning of string) */
+size_t strtrimr (char str[static 1]); /* trim whitespace of a cstring on the right (end of string) */
+size_t strcount (const char str[static 1], char c); /* count number of occurances of a character within a string */
+void strdowncase (char str[static 1]); /* transform all uppercase letters of a string into lowercase letters */
+void strupcase (char str[static 1]); /* transform all lowercase letters of a string into uppercase letters */
+bool strisblank (const char str[static 1]); /* check if a string only consists of whitespace characters */
 
 #endif // CUTILS_CSTR_H_
diff --git a/lib/inc/str.h b/lib/inc/str.h
index e0a534e..066d6f4 100644
--- a/lib/inc/str.h
+++ b/lib/inc/str.h
@@ -13,25 +13,25 @@ typedef struct
     size_t cap; /* capacity (allocated size) */
 } str_t;
 
-str_t str_new (); /* initialize a str_t string. */
+str_t str_new (void); /* initialize a str_t string. */
 str_t str_new_cap (size_t want_cap); /* initialize a str_t string with a given capacity. */
-str_t str_new_from (const char *src); /* initialize a str_t string with a given data. */
-str_t str_new_from_len (const char *src, size_t len); /* initialize a str_t string with a given data and length. */
-str_t str_clone (const str_t *orig); /* clone the contents of a str_t string into a new str_t string. */
+str_t str_new_from (const char src[static 1]); /* initialize a str_t string with a given data. */
+str_t str_new_from_len (size_t len, const char src[restrict len]); /* initialize a str_t string with a given data and length. */
+str_t str_clone (const str_t orig[static 1]); /* clone the contents of a str_t string into a new str_t string. */
 void str_free (str_t *str); /* free the contents of a str_t string. */
-void str_append (str_t *str, const char *src); /* append a string to the end of a str_t string. */
-void str_append_len (str_t *str, const char *src, size_t len); /* append a string to the end of a str_t string with a given length. */
-int str_cmp (const str_t *str, const char *s2); /* compare a str_t string with a cstring. */
-bool str_eq (const str_t *str, const char *s2); /* check if a str_t string equals a cstring. */
-bool str_starts_with (const str_t *str, const char *find); /* check if a str_t string starts with a cstring. */
-bool str_starts_with_len (const str_t *str, const char *find, size_t len); /* check if a str_t string starts with a cstring of given length. */
-bool str_ends_with (const str_t *str, const char *find); /* check if a str_t string ends with a cstring. */
-bool str_ends_with_len (const str_t *str, const char *find, size_t len); /* check if a str_t string ends with a cstring of given length. */
-char *str_find (const str_t *str, const char *find); /* find a substring in a str_t string as a pointer. */
-ssize_t str_pos (const str_t *str, const char *find); /* find the index of a substring in a str_t string. */
-bool str_is_blank (const str_t *str); /* check if a string only consists of whitespace characters. */
-void str_downcase (str_t *str); /* transform all uppercase characters in a str_t string to lowercase */
-void str_upcase (str_t *str); /* transform all lowercase characters in a str_t string to uppercase */
-void str_resize (str_t *str, size_t cap); /* resize the allocated data of a str_t string. */
+void str_append (str_t str[static 1], const char src[static 1]); /* append a string to the end of a str_t string. */
+void str_append_len (str_t str[static 1], size_t len, const char src[restrict len]); /* append a string to the end of a str_t string with a given length. */
+int str_cmp (const str_t str[static 1], const char *s2); /* compare a str_t string with a cstring. */
+bool str_eq (const str_t str[static 1], const char *s2); /* check if a str_t string equals a cstring. */
+bool str_starts_with (const str_t str[static 1], const char find[static 1]); /* check if a str_t string starts with a cstring. */
+bool str_starts_with_len (const str_t str[static 1], size_t len, const char find[restrict len]); /* check if a str_t string starts with a cstring of given length. */
+bool str_ends_with (const str_t str[static 1], const char find[static 1]); /* check if a str_t string ends with a cstring. */
+bool str_ends_with_len (const str_t str[static 1], size_t len, const char find[restrict len]); /* check if a str_t string ends with a cstring of given length. */
+char *str_find (const str_t str[static 1], const char *find); /* find a substring in a str_t string as a pointer. */
+ssize_t str_pos (const str_t str[static 1], const char *find); /* find the index of a substring in a str_t string. */
+bool str_is_blank (const str_t str[static 1]); /* check if a string only consists of whitespace characters. */
+void str_downcase (str_t str[static 1]); /* transform all uppercase characters in a str_t string to lowercase */
+void str_upcase (str_t str[static 1]); /* transform all lowercase characters in a str_t string to uppercase */
+void str_resize (str_t str[static 1], size_t cap); /* resize the allocated data of a str_t string. */
 
 #endif // CUTILS_STR_H_
diff --git a/lib/inc/test.h b/lib/inc/test.h
index 9cc4aa0..187ad94 100644
--- a/lib/inc/test.h
+++ b/lib/inc/test.h
@@ -32,11 +32,11 @@ typedef struct
 } test_group_t;
 
 test_suite_t test_suite_new (void); /* create a new test suite */
-void test_suite_free (test_suite_t *suite); /* free dynamically allocated memory occupied by a test suite */
-void test_suite_add (test_suite_t *suite, test_entry_func_t func); /* add a test group function to a test suite */
-test_results_t test_suite_run (test_suite_t *suite); /* run the entries within a test suite and print an informational message */
+void test_suite_free (test_suite_t suite[static 1]); /* free dynamically allocated memory occupied by a test suite */
+void test_suite_add (test_suite_t suite[static 1], test_entry_func_t func); /* add a test group function to a test suite */
+test_results_t test_suite_run (test_suite_t suite[static 1]); /* run the entries within a test suite and print an informational message */
 test_group_t test_group_new (void); /* create a new test group */
-void test_group_add (test_group_t *group, bool success, const char *assertion, const char *name, const char *file, size_t line); /* add a test to a test group, print an error message if the test failed */
-test_results_t test_group_get_results (test_group_t *group); /* get results of a test group. used for returning the status from a test group */
+void test_group_add (test_group_t group[static 1], bool success, const char *assertion, const char *name, const char *file, size_t line); /* add a test to a test group, print an error message if the test failed */
+test_results_t test_group_get_results (test_group_t group[static 1]); /* get results of a test group. used for returning the status from a test group */
 
 #endif // CUTILS_TEST_H_
diff --git a/lib/log.c b/lib/log.c
index 91db06b..f6ee685 100644
--- a/lib/log.c
+++ b/lib/log.c
@@ -9,19 +9,19 @@ _log_print_type (log_level_t type)
     switch (type)
     {
         case LOG_LEVEL_ERROR:
-            printf ("[\e[31merror\e[0m] ");
+            printf ("[\x1b[31merror\x1b[0m] ");
             break;
         case LOG_LEVEL_WARNING:
-            printf ("[\e[33mwarn\e[0m] ");
+            printf ("[\x1b[33mwarn\x1b[0m] ");
             break;
         case LOG_LEVEL_INFO:
-            printf ("[\e[34minfo\e[0m] ");
+            printf ("[\x1b[34minfo\x1b[0m] ");
             break;
         case LOG_LEVEL_OK:
-            printf ("[\e[32mok\e[0m] ");
+            printf ("[\x1b[32mok\x1b[0m] ");
             break;
         case LOG_LEVEL_DEBUG:
-            printf ("[\e[35mdebug\e[0m] ");
+            printf ("[\x1b[35mdebug\x1b[0m] ");
             break;
     }
 }
@@ -39,7 +39,7 @@ _log_print_type (log_level_t type)
  */
 __attribute__ ((format (printf, 2, 3)))
 void
-log_print (log_level_t type, const char *fmt, ...)
+log_print (log_level_t type, const char *restrict fmt, ...)
 {
     va_list ap;
 
@@ -65,13 +65,13 @@ log_print (log_level_t type, const char *fmt, ...)
  */
 __attribute__ ((format (printf, 4, 5)))
 void
-log_print_fl (log_level_t type, const char *file, size_t line, const char *fmt, ...)
+log_print_fl (log_level_t type, const char *file, size_t line, const char *restrict fmt, ...)
 {
     va_list ap;
 
     va_start (ap, fmt);
     _log_print_type (type);
-    printf ("(\e[36m%s:%zu\e[0m) ", file, line);
+    printf ("(\x1b[36m%s:%zu\x1b[0m) ", file, line);
     vprintf (fmt, ap);
     va_end (ap);
 }
diff --git a/lib/str.c b/lib/str.c
index 557d76e..2b39fa0 100644
--- a/lib/str.c
+++ b/lib/str.c
@@ -13,7 +13,7 @@
  * @return  a new, empty str_t instance
  */
 str_t
-str_new ()
+str_new (void)
 {
     str_t str;
 
@@ -57,9 +57,9 @@ str_new_cap (size_t want_cap)
  * @return  a new, empty str_t with given data.
  */
 inline str_t
-str_new_from (const char *src)
+str_new_from (const char src[static 1])
 {
-    return str_new_from_len (src, strlen (src));
+    return str_new_from_len (strlen (src), src);
 }
 
 /**
@@ -73,7 +73,7 @@ str_new_from (const char *src)
  * @return  a new, empty str_t with given data.
  */
 str_t
-str_new_from_len (const char *src, size_t len)
+str_new_from_len (size_t len, const char src[restrict len])
 {
     size_t cap;
     str_t str;
@@ -96,9 +96,9 @@ str_new_from_len (const char *src, size_t len)
  * @return  a new str_t instance with the same data as `str`
  */
 inline str_t
-str_clone (const str_t *orig)
+str_clone (const str_t orig[static 1])
 {
-    return str_new_from_len (orig->str, orig->len);
+    return str_new_from_len (orig->len, orig->str);
 }
 
 /**
@@ -120,9 +120,9 @@ str_free (str_t *str)
  * @param   src: the cstring to append
  */
 inline void
-str_append (str_t *str, const char *src)
+str_append (str_t str[static 1], const char src[static 1])
 {
-    str_append_len (str, src, strlen (src));
+    str_append_len (str, strlen (src), src);
 }
 
 /**
@@ -135,7 +135,7 @@ str_append (str_t *str, const char *src)
  *               strlen (src)`
  */
 void
-str_append_len (str_t *str, const char *src, size_t len)
+str_append_len (str_t str[static 1], size_t len, const char src[restrict len])
 {
     str_resize (str, str->len + len + 1);
     strncpy (str->str + str->len, src, len);
@@ -153,7 +153,7 @@ str_append_len (str_t *str, const char *src, size_t len)
  *          to be less than, to match, or to be greater than s2
  */
 inline int
-str_cmp (const str_t *str, const char *s2)
+str_cmp (const str_t str[static 1], const char *s2)
 {
     return strcmp (str->str, s2);
 }
@@ -167,7 +167,7 @@ str_cmp (const str_t *str, const char *s2)
  * @return  true if str equals s2, else false
  */
 inline bool
-str_eq (const str_t *str, const char *s2)
+str_eq (const str_t str[static 1], const char *s2)
 {
     return str_cmp (str, s2) == 0;
 }
@@ -181,9 +181,9 @@ str_eq (const str_t *str, const char *s2)
  * @return  true if `str` starts with `find`, else false
  */
 inline bool
-str_starts_with (const str_t *str, const char *find)
+str_starts_with (const str_t str[static 1], const char find[static 1])
 {
-    return str_starts_with_len (str, find, strlen (find));
+    return str_starts_with_len (str, strlen (find), find);
 }
 
 /**
@@ -197,7 +197,8 @@ str_starts_with (const str_t *str, const char *find)
  * @return  true if `str` starts with `find`, else false
  */
 inline bool
-str_starts_with_len (const str_t *str, const char *find, size_t len)
+str_starts_with_len (const str_t str[static 1], size_t len,
+                     const char find[restrict len])
 {
     return strncmp (str->str, find, len) == 0;
 }
@@ -211,9 +212,9 @@ str_starts_with_len (const str_t *str, const char *find, size_t len)
  * @return  true if `str` ends with `find`, else false
  */
 inline bool
-str_ends_with (const str_t *str, const char *find)
+str_ends_with (const str_t str[static 1], const char find[static 1])
 {
-    return str_ends_with_len (str, find, strlen (find));
+    return str_ends_with_len (str, strlen (find), find);
 }
 
 /**
@@ -227,7 +228,8 @@ str_ends_with (const str_t *str, const char *find)
  * @return  true if `str` ends with `find`, else false
  */
 inline bool
-str_ends_with_len (const str_t *str, const char *find, size_t len)
+str_ends_with_len (const str_t str[static 1], size_t len,
+                   const char find[restrict len])
 {
     return strcmp (str->str + str->len - len, find) == 0;
 }
@@ -242,7 +244,7 @@ str_ends_with_len (const str_t *str, const char *find, size_t len)
  * @return  beginning of found substring as pointer, or NULL if not found
  */
 inline char *
-str_find (const str_t *str, const char *find)
+str_find (const str_t str[static 1], const char *find)
 {
     return strstr (str->str, find);
 }
@@ -257,7 +259,7 @@ str_find (const str_t *str, const char *find)
  * @return  beginning of found substring as string index, or -1 if not found
  */
 ssize_t
-str_pos (const str_t *str, const char *find)
+str_pos (const str_t str[static 1], const char *find)
 {
     char *pos;
 
@@ -277,7 +279,7 @@ str_pos (const str_t *str, const char *find)
  *          if other characters are present. false in case of error.
  */
 inline bool
-str_is_blank (const str_t *str)
+str_is_blank (const str_t str[static 1])
 {
     return strisblank (str->str);
 }
@@ -289,7 +291,7 @@ str_is_blank (const str_t *str)
  * @param   str: the string to modify
  */
 inline void
-str_downcase (str_t *str)
+str_downcase (str_t str[static 1])
 {
     strdowncase (str->str);
 }
@@ -301,7 +303,7 @@ str_downcase (str_t *str)
  * @param   str: the string to modify
  */
 inline void
-str_upcase (str_t *str)
+str_upcase (str_t str[static 1])
 {
     strupcase (str->str);
 }
@@ -313,7 +315,7 @@ str_upcase (str_t *str)
  * @param   cap: the minimum amount of capacity to resize to
  */
 void
-str_resize (str_t *str, size_t cap)
+str_resize (str_t str[static 1], size_t cap)
 {
     cap = max (next_pow_of_two (cap), STR_MIN_ALLOC);
     if (cap > str->len && cap != str->cap)
diff --git a/lib/test.c b/lib/test.c
index 0e035a3..0b76a5d 100644
--- a/lib/test.c
+++ b/lib/test.c
@@ -31,7 +31,7 @@ test_suite_new (void)
  * @param   suite: a pointer to the suite to free up
  */
 void
-test_suite_free (test_suite_t *suite)
+test_suite_free (test_suite_t suite[static 1])
 {
     free (suite->entries);
 }
@@ -43,7 +43,7 @@ test_suite_free (test_suite_t *suite)
  * @param   func: the test group function
  */
 void
-test_suite_add (test_suite_t *suite, test_entry_func_t func)
+test_suite_add (test_suite_t suite[static 1], test_entry_func_t func)
 {
     if (suite->entries_len == suite->entries_cap - 1)
     {
@@ -64,7 +64,7 @@ test_suite_add (test_suite_t *suite, test_entry_func_t func)
  * @return  test results (number of successful and failed tests)
  */
 test_results_t
-test_suite_run (test_suite_t *suite)
+test_suite_run (test_suite_t suite[static 1])
 {
     test_results_t total_result, result;
     size_t i;
@@ -113,7 +113,7 @@ test_group_new (void)
  *          `assertion` parameters.
  */
 void
-test_group_add (test_group_t *group, bool success, const char *assertion, const char *name, const char *file, size_t line)
+test_group_add (test_group_t group[static 1], bool success, const char *assertion, const char *name, const char *file, size_t line)
 {
     if (success)
         group->results.success += 1;
@@ -131,7 +131,7 @@ test_group_add (test_group_t *group, bool success, const char *assertion, const
  * @param   group: the group to query
  */
 test_results_t
-test_group_get_results (test_group_t *group)
+test_group_get_results (test_group_t group[static 1])
 {
     return group->results;
 }