fix: u8 -> bool to be semantically coherent

Author: iWas-Coder

src/carbon_string.c

@@ -55,24 +55,24 @@ void carbon_string_strip_substr(char *s, const char *sub) {
   while ((p = strstr(s, sub))) memmove(p, p + len, carbon_string_len(p + len) + 1);
 }
 
-u8 carbon_string_starts_with_substr(const char *s, const char *sub) {
+bool carbon_string_starts_with_substr(const char *s, const char *sub) {
   return carbon_string_cmp_n(s, sub, carbon_string_len(sub)) ? false : true;
 }
 
-u8 carbon_string_ends_with_substr(const char *s, const char *sub) {
+bool carbon_string_ends_with_substr(const char *s, const char *sub) {
   usz s_len = carbon_string_len(s), sub_len = carbon_string_len(sub);
   return (s_len >= sub_len) && (!carbon_string_cmp(s + (s_len - sub_len), sub));
 }
 
-u8 carbon_string_is_number(const char *s) {
+bool carbon_string_is_number(const char *s) {
   usz len = carbon_string_len(s);
   for (usz i = 0; i < len; ++i) {
     if (!isdigit(s[i])) return false;
   }
   return true;
 }
 
-u8 carbon_string_has_char(const char *s, char c) {
+bool carbon_string_has_char(const char *s, char c) {
   const char *c_ptr = strchr(s, c);
   if (!c_ptr) return false;
   return true;

src/carbon_string.h

@@ -15,10 +15,10 @@ CARBON_API i32 carbon_string_cmp_n(const char *s1, const char *s2, usz size);
 CARBON_API char *carbon_string_dup(const char *s);
 CARBON_API char *carbon_string_fmt(const char *s, ...);
 CARBON_API void carbon_string_strip_substr(char *s, const char *sub);
-CARBON_API u8 carbon_string_starts_with_substr(const char *s, const char *sub);
-CARBON_API u8 carbon_string_ends_with_substr(const char *s, const char *sub);
-CARBON_API u8 carbon_string_is_number(const char *s);
-CARBON_API u8 carbon_string_has_char(const char *s, char c);
+CARBON_API bool carbon_string_starts_with_substr(const char *s, const char *sub);
+CARBON_API bool carbon_string_ends_with_substr(const char *s, const char *sub);
+CARBON_API bool carbon_string_is_number(const char *s);
+CARBON_API bool carbon_string_has_char(const char *s, char c);
 
 /**
  * @brief Gets the Levenshtein distance between two strings.