[patch] Support binary (0b...) numbers

[Jan Kratochvil <jan.kratochvil@redhat.com>]

Hi,

it is completely offtopic from my other work but I got now surprised GDB
cannot parse standard C syntax of binary (0b11 == 3) numbers.

No regressions on {x86_64,x86_64-m32,i686}-fedora12-linux-gnu.


Thanks,
Jan


gdb/
2010-01-11  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Implement binary numbers parsing.
	* c-exp.y (parse_number): New case 'b' and 'B'.

gdb/testsuite/
2010-01-11  Jan Kratochvil  <jan.kratochvil@redhat.com>

	Implement binary numbers parsing.
	* gdb.base/printcmds.exp (test_integer_literals_accepted)
	(test_integer_literals_rejected): New binary tests.

--- a/gdb/c-exp.y
+++ b/gdb/c-exp.y
@@ -1411,6 +1411,16 @@ parse_number (char *p, int len, int parsed_float, YYSTYPE *putithere)
 	  }
 	break;
 
+      case 'b':
+      case 'B':
+	if (len >= 3)
+	  {
+	    p += 2;
+	    base = 2;
+	    len -= 2;
+	  }
+	break;
+
       case 't':
       case 'T':
       case 'd':
--- a/gdb/testsuite/gdb.base/printcmds.exp
+++ b/gdb/testsuite/gdb.base/printcmds.exp
@@ -78,6 +78,13 @@ proc test_integer_literals_accepted {} {
     gdb_test "p 0xabcdef" " = 11259375"
     gdb_test "p 0xAbCdEf" " = 11259375"
     gdb_test "p/x 0x123" " = 0x123"
+
+    # Test various binary values.
+
+    gdb_test "p 0b0" " = 0"
+    gdb_test "p 0b1111" " = 15"
+    gdb_test "p 0B1111" " = 15"
+    gdb_test "p -0b1111" " = -15"
 }
 
 proc test_character_literals_accepted {} {
@@ -99,7 +106,8 @@ proc test_character_literals_accepted {} {
 proc test_integer_literals_rejected {} {
     global gdb_prompt
 
-    test_print_reject "p 0x" 
+    test_print_reject "p 0x"
+    test_print_reject "p 0b"
     gdb_test "p ''" "(Empty character constant\\.|A character constant must contain at least one character\\.)"
     gdb_test "p '''" "(Empty character constant\\.|A character constant must contain at least one character\\.)"
     test_print_reject "p '\\'"
@@ -131,6 +139,11 @@ proc test_integer_literals_rejected {} {
 
     test_print_reject "p 0xG" 
     test_print_reject "p 0xAG" 
+
+    # Test various binary values.
+
+    test_print_reject "p 0b2" 
+    test_print_reject "p 0b12" 
 }
 
 proc test_print_all_chars {} {