Make unreachable() useful when debugging, and move common macros

6 files changed, 31 insertions, 18 deletions

diff --git a/src/c8asm/assembler.c b/src/c8asm/assembler.c
index 353d904..c682ccb 100644
--- a/src/c8asm/assembler.c
+++ b/src/c8asm/assembler.c
@@ -10,13 +10,9 @@
 #include "assembler.h"
 #include "cerr.h"
 #include "common.h"
+#include "macros.h"
 #include "parser.h"
 
-/* TODO: Remove */
-#ifndef unreachable
-#	define unreachable() __builtin_unreachable()
-#endif
-
 #define E_LEXISTS  "label ‘%.*s’ has already been declared"
 #define E_LNEXISTS "label ‘%.*s’ hasn’t been declared"
 
diff --git a/src/c8asm/common.h b/src/c8asm/common.h
index 165e6bc..f5899f0 100644
--- a/src/c8asm/common.h
+++ b/src/c8asm/common.h
@@ -3,14 +3,6 @@
 
 #include <rune.h>
 
-#define MIN(x, y) ((x) < (y) ? (x) : (y))
-#define MAX(x, y) ((x) > (y) ? (x) : (y))
-
-#define lengthof(a)    (sizeof(a) / sizeof(*(a)))
-#define memeq(x, y, n) (!memcmp(x, y, n))
-#define streq(x, y)    (!strcmp(x, y))
-#define u8eq(x, y)     (!u8cmp(x, y))
-
 extern size_t filesize;
 extern const char *filename;
 extern const char8_t *baseptr;
diff --git a/src/c8asm/lexer.c b/src/c8asm/lexer.c
index 16a9d5e..04fb8ad 100644
--- a/src/c8asm/lexer.c
+++ b/src/c8asm/lexer.c
@@ -5,6 +5,7 @@
 #include "cerr.h"
 #include "common.h"
 #include "lexer.h"
+#include "macros.h"
 
 #define ISDIGIT(n)   ((n) >= '0' && (n) <= '9')
 #define U8MOV(sv, n) ((sv)->p += (n), (sv)->len -= (n))
diff --git a/src/c8asm/main.c b/src/c8asm/main.c
index 0c8a28a..c70aed5 100644
--- a/src/c8asm/main.c
+++ b/src/c8asm/main.c
@@ -13,6 +13,7 @@
 #include "cerr.h"
 #include "common.h"
 #include "lexer.h"
+#include "macros.h"
 #include "parser.h"
 
 static void asmfile(int, const char *);
diff --git a/src/c8asm/parser.c b/src/c8asm/parser.c
index 357a082..d6e79f9 100644
--- a/src/c8asm/parser.c
+++ b/src/c8asm/parser.c
@@ -8,13 +8,9 @@
 #include "cerr.h"
 #include "common.h"
 #include "lexer.h"
+#include "macros.h"
 #include "parser.h"
 
-/* TODO: Remove */
-#ifndef unreachable
-#	define unreachable() __builtin_unreachable()
-#endif
-
 #define E_BADLABEL  "identifier ‘%.*s’ cannot be used as a label"
 #define E_EARLY     "expected %s but input ended prematurely"
 #define E_EXPECTED2 "expected %s but got %s"
diff --git a/src/common/macros.h b/src/common/macros.h
new file mode 100644
index 0000000..6daf08f
--- /dev/null
+++ b/src/common/macros.h
@@ -0,0 +1,27 @@
+#ifndef AHOY_COMMON_MACROS_H
+#define AHOY_COMMON_MACROS_H
+
+#define MIN(x, y) ((x) < (y) ? (x) : (y))
+#define MAX(x, y) ((x) > (y) ? (x) : (y))
+
+#define lengthof(a)    (sizeof(a) / sizeof(*(a)))
+#define memeq(x, y, n) (!memcmp(x, y, n))
+#define streq(x, y)    (!strcmp(x, y))
+#define u8eq(x, y)     (!u8cmp(x, y))
+
+#if DEBUG || !defined(unreachable)
+#	if DEBUG
+#		include "cerr.h"
+#		ifdef unreachable
+#			undef unreachable
+#		endif
+#		define unreachable() \
+			diex("%s:%d: hit unreachable in %s()", __FILE__, __LINE__, __func__)
+#	elifdef __clang__
+#		define unreachable() __builtin_unreachable()
+#	else
+#		include <stddef.h>
+#	endif
+#endif
+
+#endif /* !AHOY_COMMON_MACROS_H */