move Rust sources to top level, C sources into c_src

[bcachefs-tools-debian] / c_src / ccan / array_size / _info

diff --git a/c_src/ccan/array_size/_info b/c_src/ccan/array_size/_info
new file mode 100644 (file)
index 0000000..69570f3
--- /dev/null
+++ b/c_src/ccan/array_size/_info
@@ -0,0 +1,46 @@
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+
+/**
+ * array_size - routine for safely deriving the size of a visible array.
+ *
+ * This provides a simple ARRAY_SIZE() macro, which (given a good compiler)
+ * will also break compile if you try to use it on a pointer.
+ *
+ * This can ensure your code is robust to changes, without needing a gratuitous
+ * macro or constant.
+ *
+ * Example:
+ *     // Outputs "Initialized 32 values\n"
+ *     #include <ccan/array_size/array_size.h>
+ *     #include <stdlib.h>
+ *     #include <stdio.h>
+ *
+ *     // We currently use 32 random values.
+ *     static unsigned int vals[32];
+ *
+ *     int main(void)
+ *     {
+ *             unsigned int i;
+ *             for (i = 0; i < ARRAY_SIZE(vals); i++)
+ *                     vals[i] = random();
+ *             printf("Initialized %u values\n", i);
+ *             return 0;
+ *     }
+ *
+ * License: CC0 (Public domain)
+ * Author: Rusty Russell <rusty@rustcorp.com.au>
+ */
+int main(int argc, char *argv[])
+{
+       if (argc != 2)
+               return 1;
+
+       if (strcmp(argv[1], "depends") == 0) {
+               printf("ccan/build_assert\n");
+               return 0;
+       }
+
+       return 1;
+}