Fix stale filename comment, const qualifier, and int-to-size_t casts

- test_preload.c: @file main.c -> @file test_preload.c
- show_alloc_mem.c, test_preload.c: hex array -> static const
- show_alloc_mem.c, test_preload.c, test_random.c: use size_t
  for sizeof-derived indices instead of casting to int

3 files changed, 11 insertions, 11 deletions

diff --git a/src/show_alloc_mem.c b/src/show_alloc_mem.c
index 6fd5e37..5ffdecc 100644
--- a/src/show_alloc_mem.c
+++ b/src/show_alloc_mem.c
@@ -10,13 +10,13 @@
 static void
 _s_put_ptr (void *ptr)
 {
-  const char hex[] = "0123456789abcdef";
+  static const char hex[] = "0123456789abcdef";
   char buf[20];
   unsigned long value;
-  int i;
+  size_t i;
 
   value = (unsigned long)ptr;
-  i = (int)sizeof (buf);
+  i = sizeof (buf);
   while (value)
     {
       buf[--i] = hex[value % 16];
diff --git a/tests/src/test_preload.c b/tests/src/test_preload.c
index 0ded605..7369035 100644
--- a/tests/src/test_preload.c
+++ b/tests/src/test_preload.c
@@ -1,5 +1,5 @@
 /**
- * @file   main.c
+ * @file   test_preload.c
  * @brief  Smoke test — call malloc once and print the returned pointer.
  *
  * Uses write(2) instead of printf to avoid stdio calling malloc
@@ -13,17 +13,17 @@
 static void
 _s_put_ptr (void *ptr)
 {
-  const char hex[] = "0123456789abcdef";
+  static const char hex[] = "0123456789abcdef";
   char buf[20];
   unsigned long v = (unsigned long)ptr;
-  int i;
+  size_t i;
 
   if (!ptr)
     {
       write (1, "(nil)", 5);
       return;
     }
-  i = (int)sizeof (buf);
+  i = sizeof (buf);
   while (v)
     {
       buf[--i] = hex[v % 16];
@@ -31,7 +31,7 @@ _s_put_ptr (void *ptr)
     }
   buf[--i] = 'x';
   buf[--i] = '0';
-  write (1, buf + i, (size_t)(sizeof (buf) - i));
+  write (1, buf + i, sizeof (buf) - i);
 }
 
 int
diff --git a/tests/src/test_random.c b/tests/src/test_random.c
index 396abf9..89284a0 100644
--- a/tests/src/test_random.c
+++ b/tests/src/test_random.c
@@ -31,9 +31,9 @@ static void
 _s_put_nbr (int n)
 {
   char buf[12];
-  int i;
+  size_t i;
 
-  i = (int)sizeof (buf);
+  i = sizeof (buf);
   if (n == 0)
     buf[--i] = '0';
   while (n > 0)
@@ -41,7 +41,7 @@ _s_put_nbr (int n)
       buf[--i] = '0' + (n % 10);
       n /= 10;
     }
-  write (1, buf + i, (size_t)(sizeof (buf) - i));
+  write (1, buf + i, sizeof (buf) - i);
 }
 
 static unsigned char