str: Fix to_c_str() when length is MAX_ALLOC_32

Signed-off-by: Andrew Opalach <andrew@akon.city>

2 files changed, 7 insertions, 3 deletions

diff --git a/include/al/str.h b/include/al/str.h
index 20a1c26..a572dec 100644
--- a/include/al/str.h
+++ b/include/al/str.h
@@ -79,9 +79,10 @@ static inline void al_str_to_upper(str *s)
 // Returned c_str must be free'd by the user.
 static inline char *al_str_to_c_str(str *s)
 {
-    char *c_str = (char *)al_malloc(s->length + 1);
-    al_memcpy(c_str, s->data, s->length);
-    c_str[s->length] = '\0';
+    size_t length = (size_t)s->length;
+    char *c_str = (char *)al_malloc(length + 1);
+    al_memcpy(c_str, s->data, length);
+    c_str[length] = '\0';
     return c_str;
 }
 
diff --git a/tests/str.c b/tests/str.c
index c783673..933b1f9 100644
--- a/tests/str.c
+++ b/tests/str.c
@@ -344,6 +344,9 @@ static bool str_test_limits(void)
     }
     al_str_cat(&s, &al_str_c("x"));
 
+    char *c_str = al_str_to_c_str(&s);
+    AL_TEST_TRUE(al_strlen(c_str) == MAX_ALLOC_32);
+
     AL_TEST_TRUE(al_str_atr(&s, 1) == 'x');
     AL_TEST_TRUE(al_str_at(&s, MAX_ALLOC_32 - 1) == 'x');
     AL_TEST_TRUE(al_str_atr(&s, 2) == 'y');