Basic UTF-8 functions

src/main.c

@@ -451,10 +451,13 @@ void string_test_misc(void)
     bool prefix1 = str_starts_with(str1, S("He"));
     bool prefix2 = str_starts_with(str1, S(""));
     bool prefix3 = str_starts_with(str1, S("false"));
+    bool prefix4 = str_starts_with(str1, S("Hello World"));
+
     bool suffix1 = str_ends_with(str1, S("orld"));
     bool suffix2 = str_ends_with(str1, S(""));
     bool suffix3 = str_ends_with(str1, S("false"));
-    printf("matches: %d %d %d %d %d %d\n", prefix1, prefix2, prefix3, suffix1, suffix2, suffix3);
+    bool suffix4 = str_ends_with(str1, S("Hello World"));
+    printf("matches: %d %d %d %d %d %d %d %d\n", prefix1, prefix2, prefix3, prefix4, suffix1, suffix2, suffix3, suffix4);
 
     Str str2 = S(" Hello World\t \n");
     Str str2_trim = str_ascii_trim(str2);
@@ -465,7 +468,6 @@ void string_test_misc(void)
     Str str3_trim = str_ascii_trim(str3);
     printf("str3_trim: '%.*s'\n", str3_trim.len, str3_trim.str);
 
-
     Str str4 = S("   \t\t    ");
     Str str4_trim = str_ascii_trim(str4);
     printf("str4_trim: '%.*s'\n", str4_trim.len, str4_trim.str);
@@ -499,6 +501,34 @@ void string_test_join(void)
 
 }
 
+void print_runes(Str str)
+{
+    U32 offset = 0;
+    U32 len = str_rune_count(str);
+    printf("rune len %d\n", len);
+    while (offset < str.len) {
+        RuneDecode d = str_utf8_decode(str, offset);
+        printf("Rune: %d  valid: %d\n", d.rune, d.valid);
+        offset += d.width;
+    }
+}
+
+void string_test_utf8(void)
+{
+    Str str1 = S("Test 1ø2 ☺");
+
+    TRACEF("str1:\n");
+    print_runes(str1);
+
+    Str str2 = str_empty();
+    TRACEF("str2:\n");
+    print_runes(str2);
+
+    Str str3 = S("1Å 2\xc6" "3\xc3");
+    TRACEF("str3:\n");
+    print_runes(str3);
+}
+
 int main(int argc, char *argv[])
 {
     arena_test_1();
@@ -515,6 +545,7 @@ int main(int argc, char *argv[])
     string_split_test_1();
     string_test_misc();
     string_test_join();
+    string_test_utf8();
 
 }