[master] ea1df10 Compress this eyesore using CPP

Poul-Henning Kamp phk at varnish-cache.org
Tue Jun 26 11:24:21 CEST 2012


commit ea1df10930ec15629c386dc692cb6c08d3d82392
Author: Poul-Henning Kamp <phk at FreeBSD.org>
Date:   Tue Jun 26 09:24:11 2012 +0000

    Compress this eyesore using CPP

diff --git a/lib/libvarnishcompat/execinfo.c b/lib/libvarnishcompat/execinfo.c
index b1a17cf..113ae32 100644
--- a/lib/libvarnishcompat/execinfo.c
+++ b/lib/libvarnishcompat/execinfo.c
@@ -126,278 +126,37 @@ backtrace_symbols(void *const *buffer, int size)
 	return (rval);
 }
 
+/* Binary expansion */
+#define L1(x)	L0(x); L0(x + 0x01);
+#define L2(x)	L1(x); L1(x + 0x02);
+#define L3(x)	L2(x); L2(x + 0x04);
+#define L4(x)	L3(x); L3(x + 0x08);
+#define L5(x)	L4(x); L4(x + 0x10);
+#define L6(x)	L5(x); L5(x + 0x20);
+#define L7(x)	L6(x); L6(x + 0x40);
+
 static void *
 getreturnaddr(int level)
 {
 
-    switch(level) {
-    case 0: return __builtin_return_address(1);
-    case 1: return __builtin_return_address(2);
-    case 2: return __builtin_return_address(3);
-    case 3: return __builtin_return_address(4);
-    case 4: return __builtin_return_address(5);
-    case 5: return __builtin_return_address(6);
-    case 6: return __builtin_return_address(7);
-    case 7: return __builtin_return_address(8);
-    case 8: return __builtin_return_address(9);
-    case 9: return __builtin_return_address(10);
-    case 10: return __builtin_return_address(11);
-    case 11: return __builtin_return_address(12);
-    case 12: return __builtin_return_address(13);
-    case 13: return __builtin_return_address(14);
-    case 14: return __builtin_return_address(15);
-    case 15: return __builtin_return_address(16);
-    case 16: return __builtin_return_address(17);
-    case 17: return __builtin_return_address(18);
-    case 18: return __builtin_return_address(19);
-    case 19: return __builtin_return_address(20);
-    case 20: return __builtin_return_address(21);
-    case 21: return __builtin_return_address(22);
-    case 22: return __builtin_return_address(23);
-    case 23: return __builtin_return_address(24);
-    case 24: return __builtin_return_address(25);
-    case 25: return __builtin_return_address(26);
-    case 26: return __builtin_return_address(27);
-    case 27: return __builtin_return_address(28);
-    case 28: return __builtin_return_address(29);
-    case 29: return __builtin_return_address(30);
-    case 30: return __builtin_return_address(31);
-    case 31: return __builtin_return_address(32);
-    case 32: return __builtin_return_address(33);
-    case 33: return __builtin_return_address(34);
-    case 34: return __builtin_return_address(35);
-    case 35: return __builtin_return_address(36);
-    case 36: return __builtin_return_address(37);
-    case 37: return __builtin_return_address(38);
-    case 38: return __builtin_return_address(39);
-    case 39: return __builtin_return_address(40);
-    case 40: return __builtin_return_address(41);
-    case 41: return __builtin_return_address(42);
-    case 42: return __builtin_return_address(43);
-    case 43: return __builtin_return_address(44);
-    case 44: return __builtin_return_address(45);
-    case 45: return __builtin_return_address(46);
-    case 46: return __builtin_return_address(47);
-    case 47: return __builtin_return_address(48);
-    case 48: return __builtin_return_address(49);
-    case 49: return __builtin_return_address(50);
-    case 50: return __builtin_return_address(51);
-    case 51: return __builtin_return_address(52);
-    case 52: return __builtin_return_address(53);
-    case 53: return __builtin_return_address(54);
-    case 54: return __builtin_return_address(55);
-    case 55: return __builtin_return_address(56);
-    case 56: return __builtin_return_address(57);
-    case 57: return __builtin_return_address(58);
-    case 58: return __builtin_return_address(59);
-    case 59: return __builtin_return_address(60);
-    case 60: return __builtin_return_address(61);
-    case 61: return __builtin_return_address(62);
-    case 62: return __builtin_return_address(63);
-    case 63: return __builtin_return_address(64);
-    case 64: return __builtin_return_address(65);
-    case 65: return __builtin_return_address(66);
-    case 66: return __builtin_return_address(67);
-    case 67: return __builtin_return_address(68);
-    case 68: return __builtin_return_address(69);
-    case 69: return __builtin_return_address(70);
-    case 70: return __builtin_return_address(71);
-    case 71: return __builtin_return_address(72);
-    case 72: return __builtin_return_address(73);
-    case 73: return __builtin_return_address(74);
-    case 74: return __builtin_return_address(75);
-    case 75: return __builtin_return_address(76);
-    case 76: return __builtin_return_address(77);
-    case 77: return __builtin_return_address(78);
-    case 78: return __builtin_return_address(79);
-    case 79: return __builtin_return_address(80);
-    case 80: return __builtin_return_address(81);
-    case 81: return __builtin_return_address(82);
-    case 82: return __builtin_return_address(83);
-    case 83: return __builtin_return_address(84);
-    case 84: return __builtin_return_address(85);
-    case 85: return __builtin_return_address(86);
-    case 86: return __builtin_return_address(87);
-    case 87: return __builtin_return_address(88);
-    case 88: return __builtin_return_address(89);
-    case 89: return __builtin_return_address(90);
-    case 90: return __builtin_return_address(91);
-    case 91: return __builtin_return_address(92);
-    case 92: return __builtin_return_address(93);
-    case 93: return __builtin_return_address(94);
-    case 94: return __builtin_return_address(95);
-    case 95: return __builtin_return_address(96);
-    case 96: return __builtin_return_address(97);
-    case 97: return __builtin_return_address(98);
-    case 98: return __builtin_return_address(99);
-    case 99: return __builtin_return_address(100);
-    case 100: return __builtin_return_address(101);
-    case 101: return __builtin_return_address(102);
-    case 102: return __builtin_return_address(103);
-    case 103: return __builtin_return_address(104);
-    case 104: return __builtin_return_address(105);
-    case 105: return __builtin_return_address(106);
-    case 106: return __builtin_return_address(107);
-    case 107: return __builtin_return_address(108);
-    case 108: return __builtin_return_address(109);
-    case 109: return __builtin_return_address(110);
-    case 110: return __builtin_return_address(111);
-    case 111: return __builtin_return_address(112);
-    case 112: return __builtin_return_address(113);
-    case 113: return __builtin_return_address(114);
-    case 114: return __builtin_return_address(115);
-    case 115: return __builtin_return_address(116);
-    case 116: return __builtin_return_address(117);
-    case 117: return __builtin_return_address(118);
-    case 118: return __builtin_return_address(119);
-    case 119: return __builtin_return_address(120);
-    case 120: return __builtin_return_address(121);
-    case 121: return __builtin_return_address(122);
-    case 122: return __builtin_return_address(123);
-    case 123: return __builtin_return_address(124);
-    case 124: return __builtin_return_address(125);
-    case 125: return __builtin_return_address(126);
-    case 126: return __builtin_return_address(127);
-    case 127: return __builtin_return_address(128);
-    default: return NULL;
-    }
+	switch(level) {
+#define L0(x)	case x: return __builtin_return_address(x + 1);
+	L7(0)
+#undef L0
+	default: return NULL;
+	}
 }
 
 static void *
 getframeaddr(int level)
 {
 
-    switch(level) {
-    case 0: return __builtin_frame_address(1);
-    case 1: return __builtin_frame_address(2);
-    case 2: return __builtin_frame_address(3);
-    case 3: return __builtin_frame_address(4);
-    case 4: return __builtin_frame_address(5);
-    case 5: return __builtin_frame_address(6);
-    case 6: return __builtin_frame_address(7);
-    case 7: return __builtin_frame_address(8);
-    case 8: return __builtin_frame_address(9);
-    case 9: return __builtin_frame_address(10);
-    case 10: return __builtin_frame_address(11);
-    case 11: return __builtin_frame_address(12);
-    case 12: return __builtin_frame_address(13);
-    case 13: return __builtin_frame_address(14);
-    case 14: return __builtin_frame_address(15);
-    case 15: return __builtin_frame_address(16);
-    case 16: return __builtin_frame_address(17);
-    case 17: return __builtin_frame_address(18);
-    case 18: return __builtin_frame_address(19);
-    case 19: return __builtin_frame_address(20);
-    case 20: return __builtin_frame_address(21);
-    case 21: return __builtin_frame_address(22);
-    case 22: return __builtin_frame_address(23);
-    case 23: return __builtin_frame_address(24);
-    case 24: return __builtin_frame_address(25);
-    case 25: return __builtin_frame_address(26);
-    case 26: return __builtin_frame_address(27);
-    case 27: return __builtin_frame_address(28);
-    case 28: return __builtin_frame_address(29);
-    case 29: return __builtin_frame_address(30);
-    case 30: return __builtin_frame_address(31);
-    case 31: return __builtin_frame_address(32);
-    case 32: return __builtin_frame_address(33);
-    case 33: return __builtin_frame_address(34);
-    case 34: return __builtin_frame_address(35);
-    case 35: return __builtin_frame_address(36);
-    case 36: return __builtin_frame_address(37);
-    case 37: return __builtin_frame_address(38);
-    case 38: return __builtin_frame_address(39);
-    case 39: return __builtin_frame_address(40);
-    case 40: return __builtin_frame_address(41);
-    case 41: return __builtin_frame_address(42);
-    case 42: return __builtin_frame_address(43);
-    case 43: return __builtin_frame_address(44);
-    case 44: return __builtin_frame_address(45);
-    case 45: return __builtin_frame_address(46);
-    case 46: return __builtin_frame_address(47);
-    case 47: return __builtin_frame_address(48);
-    case 48: return __builtin_frame_address(49);
-    case 49: return __builtin_frame_address(50);
-    case 50: return __builtin_frame_address(51);
-    case 51: return __builtin_frame_address(52);
-    case 52: return __builtin_frame_address(53);
-    case 53: return __builtin_frame_address(54);
-    case 54: return __builtin_frame_address(55);
-    case 55: return __builtin_frame_address(56);
-    case 56: return __builtin_frame_address(57);
-    case 57: return __builtin_frame_address(58);
-    case 58: return __builtin_frame_address(59);
-    case 59: return __builtin_frame_address(60);
-    case 60: return __builtin_frame_address(61);
-    case 61: return __builtin_frame_address(62);
-    case 62: return __builtin_frame_address(63);
-    case 63: return __builtin_frame_address(64);
-    case 64: return __builtin_frame_address(65);
-    case 65: return __builtin_frame_address(66);
-    case 66: return __builtin_frame_address(67);
-    case 67: return __builtin_frame_address(68);
-    case 68: return __builtin_frame_address(69);
-    case 69: return __builtin_frame_address(70);
-    case 70: return __builtin_frame_address(71);
-    case 71: return __builtin_frame_address(72);
-    case 72: return __builtin_frame_address(73);
-    case 73: return __builtin_frame_address(74);
-    case 74: return __builtin_frame_address(75);
-    case 75: return __builtin_frame_address(76);
-    case 76: return __builtin_frame_address(77);
-    case 77: return __builtin_frame_address(78);
-    case 78: return __builtin_frame_address(79);
-    case 79: return __builtin_frame_address(80);
-    case 80: return __builtin_frame_address(81);
-    case 81: return __builtin_frame_address(82);
-    case 82: return __builtin_frame_address(83);
-    case 83: return __builtin_frame_address(84);
-    case 84: return __builtin_frame_address(85);
-    case 85: return __builtin_frame_address(86);
-    case 86: return __builtin_frame_address(87);
-    case 87: return __builtin_frame_address(88);
-    case 88: return __builtin_frame_address(89);
-    case 89: return __builtin_frame_address(90);
-    case 90: return __builtin_frame_address(91);
-    case 91: return __builtin_frame_address(92);
-    case 92: return __builtin_frame_address(93);
-    case 93: return __builtin_frame_address(94);
-    case 94: return __builtin_frame_address(95);
-    case 95: return __builtin_frame_address(96);
-    case 96: return __builtin_frame_address(97);
-    case 97: return __builtin_frame_address(98);
-    case 98: return __builtin_frame_address(99);
-    case 99: return __builtin_frame_address(100);
-    case 100: return __builtin_frame_address(101);
-    case 101: return __builtin_frame_address(102);
-    case 102: return __builtin_frame_address(103);
-    case 103: return __builtin_frame_address(104);
-    case 104: return __builtin_frame_address(105);
-    case 105: return __builtin_frame_address(106);
-    case 106: return __builtin_frame_address(107);
-    case 107: return __builtin_frame_address(108);
-    case 108: return __builtin_frame_address(109);
-    case 109: return __builtin_frame_address(110);
-    case 110: return __builtin_frame_address(111);
-    case 111: return __builtin_frame_address(112);
-    case 112: return __builtin_frame_address(113);
-    case 113: return __builtin_frame_address(114);
-    case 114: return __builtin_frame_address(115);
-    case 115: return __builtin_frame_address(116);
-    case 116: return __builtin_frame_address(117);
-    case 117: return __builtin_frame_address(118);
-    case 118: return __builtin_frame_address(119);
-    case 119: return __builtin_frame_address(120);
-    case 120: return __builtin_frame_address(121);
-    case 121: return __builtin_frame_address(122);
-    case 122: return __builtin_frame_address(123);
-    case 123: return __builtin_frame_address(124);
-    case 124: return __builtin_frame_address(125);
-    case 125: return __builtin_frame_address(126);
-    case 126: return __builtin_frame_address(127);
-    case 127: return __builtin_frame_address(128);
-    default: return NULL;
-    }
+	switch(level) {
+#define L0(x)	case x: return __builtin_frame_address(x + 1);
+	L7(0)
+#undef L0
+	default: return NULL;
+	}
 }
 
 #else



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