refactor: reorganize tests

1 files changed, 47 insertions, 0 deletions

diff --git a/test/macro_demo.c b/test/macro_demo.c
new file mode 100644
index 0000000..072ec02
--- /dev/null
+++ b/test/macro_demo.c
@@ -0,0 +1,47 @@
+// a playground for the macro unwrapper. open this file in hsdbg's source view,
+// then hover any highlighted macro for a preview and click it to step through
+// the expansion one layer at a time in the macros panel.
+
+#include <stdio.h>
+
+// object-like macros that lean on each other, so unrolling takes real layers:
+// KIB -> (1 << 10), MIB -> (KIB * KIB) -> ((1 << 10) * (1 << 10)), and so on
+#define KIB (1 << 10)
+#define MIB (KIB * KIB)
+#define GIB (MIB * KIB)
+
+// function-like macros, including one built out of another
+#define SQUARE(x) ((x) * (x))
+#define CUBE(x)   (SQUARE(x) * (x))
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define CLAMP(v, lo, hi) MAX(lo, MIN(v, hi))
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+
+// the classic stringize-through-indirection: STR sees its argument raw, XSTR
+// expands it first. hover both to see "VERSION" vs "3"
+#define VERSION 3
+#define STR(x)  #x
+#define XSTR(x) STR(x)
+
+// token pasting, direct and through a level of indirection
+#define CAT(a, b)  a ## b
+#define XCAT(a, b) CAT(a, b)
+
+// a variadic logging macro
+#define LOG(level, fmt, ...) fprintf(stderr, "[" level "] " fmt "\n", __VA_ARGS__)
+
+int main(void)
+{
+    int width  = 5;
+    int height = 9;
+
+    printf("a mebibyte is %d bytes\n", MIB);
+    printf("square %d, cube %d\n", SQUARE(width), CUBE(width));
+    printf("clamped %d\n", CLAMP(height, 0, 8));
+    printf("building version %s\n", XSTR(VERSION));
+
+    int XCAT(sum_, 1) = width + height;
+    LOG("info", "sum is %d", XCAT(sum_, 1));
+
+    return 0;
+}