add obj.h

obj.h

@@ -0,0 +1,74 @@
+#ifndef __OBJ_H__
+#define __OBJ_H__
+
+#include <stdio.h>
+#include <stdlib.h>
+
+/* obj.h: objecty and exceptiony stuff
+ *
+ * Some macros to make C a bit more like C++, but without bringing in
+ * all of C++'s crapola.
+ */
+
+/* Here's an example:
+ *
+ * int
+ * foo()
+ * {
+ *   struct bar *b = NULL;
+ *   FILE       *f = NULL;
+ *
+ *   attempt {
+ *     b = new(struct bar);
+ *     if (! b) fail;
+ *
+ *     f = fopen("foo", "r");
+ *     if (! f) fail;
+ *
+ *     (void)fgets(b->baz, 10, f);
+ *   }
+ *
+ *   if (f) {
+ *     (void)fclose(f);
+ *   }
+ *
+ *   recover {
+ *     if (b) {
+ *       free(b);
+ *     }
+ *     return -1;
+ *   }
+ *
+ *   return 0;
+ * }
+ */
+
+/** Exception-type things
+ *
+ * These allow you to have pseudo-exceptions.  It looks kludgy and it
+ * is, but it's only that way so you can have nice pretty code.
+ */
+static int __obj_passed = 0;
+#define attempt for (__obj_passed = 0; !__obj_passed; __obj_passed = 1)
+#define fail break
+#define succeed continue
+#define recover if (__obj_passed ? (__obj_passed = 0) : 1)
+
+#define new(type) (type *)calloc(1, sizeof(type))
+
+
+
+/* Some things I use for debugging */
+#ifdef NODUMP
+#  define DUMPf(fmt, args...)
+#else
+#  define DUMPf(fmt, args...) fprintf(stderr, "%s:%s:%d " fmt "\n", __FILE__, __FUNCTION__, __LINE__, ##args)
+#endif
+#define DUMP() DUMPf("")
+#define DUMP_d(v) DUMPf("%s = %d", #v, v)
+#define DUMP_x(v) DUMPf("%s = 0x%x", #v, v)
+#define DUMP_s(v) DUMPf("%s = %s", #v, v)
+#define DUMP_c(v) DUMPf("%s = '%c' (0x%02x)", #v, v, v)
+#define DUMP_p(v) DUMPf("%s = %p", #v, v)
+
+#endif