From 20e52f326cdf1b6c2ca9b2c0b5be07637d9196d2 Mon Sep 17 00:00:00 2001
From: flu0r1ne <flu0r1ne@flu0r1ne.net>
Date: Sun, 30 Oct 2022 19:30:29 -0500
Subject: Initial commit

---
 util/util.h | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 util/util.h

(limited to 'util/util.h')

diff --git a/util/util.h b/util/util.h
new file mode 100644
index 0000000..ef378ca
--- /dev/null
+++ b/util/util.h
@@ -0,0 +1,78 @@
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdbool.h>
+
+#if defined(__GNUC__) || defined(__clang__)
+# define NORETURN __attribute__((__noreturn__))
+#else
+# define NORETURN
+#endif
+
+#if defined(__GNUC__)
+# define UNUSED __attribute__((__unused__))
+#else
+# define UNUSED
+#endif
+
+#define N_ENTRIES(x) (sizeof(x) / sizeof(*x))
+#define member_size(type, member) sizeof(((type *)(0))->member)
+#define TYPEOF(x) __typeof__(x)
+
+#define PACKED __attribute__((__packed__))
+
+#if defined(__GNUC__)
+# define FALLTHROUGH __attribute__ ((fallthrough))
+#else
+# define FALLTHROUGH
+#endif
+
+NORETURN void die(const char *format, ...) __attribute__((format (printf, 1, 2)));
+NORETURN void die_errno(const char *format, ...) __attribute__((format (printf, 1, 2)));
+
+void err(const char * format, ...) __attribute__((format (printf, 1, 2)));
+void err_errno(const char * format, ...) __attribute__((format (printf, 1, 2)));
+
+#define XREALLOC_ARRAY(x, alloc) ((x) = xrealloc((x), (alloc) * sizeof(*(x))))
+#define ALLOC_ARRAY(x, n) (malloc((n) * sizeof(*x)))
+
+#define ALIGN_ADDR_MASK(addr, mask) \
+	((addr + ((mask) - 1)) & ~((mask) - 1))
+
+#define ALIGN_ADDR_16(addr) ALIGN_ADDR_MASK(addr, 0x10)
+#define ALIGN_ADDR_32(addr) ALIGN_ADDR_MASK(addr, 0x20)
+#define ALIGN_ADDR_64(addr) ALIGN_ADDR_MASK(addr, 0x40)
+#define ALIGN_ADDR(addr, bytes) ALIGN_ADDR_MASK(addr, (8ULL*(bytes)))
+
+// Scaling: 0, 24, 66, 140, 269, 495, 890
+#define ALLOC_NC(x) (((x)+14)*7/4)
+
+#define AM_RESIZE_ALLOC(buf, sz, cap, item_sz, alloc_nc) \
+	do {                                                  \
+		TYPEOF(sz) _sz = (sz);                             \
+		if((cap) < _sz) {                                  \
+			void * nb;                                      \
+			TYPEOF(cap) nc;                                 \
+			if(_sz < alloc_nc((cap))) {                     \
+				nc = alloc_nc((cap));                        \
+			} else {                                        \
+				nc = _sz;                                    \
+			}                                               \
+			nb = realloc((buf), (item_sz) * nc);            \
+			if(nb) {                                        \
+				(cap) = nc;                                  \
+				(buf) = nb;                                  \
+			} else {                                        \
+				free((buf));                                 \
+				(buf) = NULL;                                \
+			}                                               \
+		}                                                  \
+	} while(0)
+
+#define AM_RESIZE(buf, sz, cap) \
+	AM_RESIZE_ALLOC(buf, sz, cap, sizeof(*buf), ALLOC_NC)
+
+#endif
-- 
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