[SCM] archer-tromey-multi-breakpoint-2: added $_strcmp and $_memcmp

[SCM] archer-tromey-multi-breakpoint-2: added $_strcmp and $_memcmp

[tromey]

The branch, archer-tromey-multi-breakpoint-2 has been updated
       via  4aabb4b780d0cd66dce3621f4c93e146e150d618 (commit)
      from  b1516d990e344bd827028ad11032eb89cf530e5d (commit)

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- Log -----------------------------------------------------------------
commit 4aabb4b780d0cd66dce3621f4c93e146e150d618
Author: Tom Tromey <tromey@redhat.com>
Date:   Wed Feb 9 08:11:17 2011 -0700

    added $_strcmp and $_memcmp

-----------------------------------------------------------------------

Summary of changes:
 gdb/data-directory/Makefile.in        |    3 +-
 gdb/python/lib/gdb/__init__.py        |    1 +
 gdb/python/lib/gdb/function/strcmp.py |   67 +++++++++++++++++++++++++++++++++
 3 files changed, 70 insertions(+), 1 deletions(-)
 create mode 100644 gdb/python/lib/gdb/function/strcmp.py

First 500 lines of diff:
diff --git a/gdb/data-directory/Makefile.in b/gdb/data-directory/Makefile.in
index 64c5bfe..596ca62 100644
--- a/gdb/data-directory/Makefile.in
+++ b/gdb/data-directory/Makefile.in
@@ -60,7 +60,8 @@ PYTHON_FILES = \
 	gdb/command/__init__.py \
 	gdb/command/multi.py \
 	gdb/command/pretty_printers.py \
-	gdb/command/prompt.py
+	gdb/command/prompt.py \
+	gdb/function/strcmp.py
 
 FLAGS_TO_PASS = \
 	"prefix=$(prefix)" \
diff --git a/gdb/python/lib/gdb/__init__.py b/gdb/python/lib/gdb/__init__.py
index d433110..0b15521 100644
--- a/gdb/python/lib/gdb/__init__.py
+++ b/gdb/python/lib/gdb/__init__.py
@@ -16,5 +16,6 @@
 import gdb.command.pretty_printers
 import gdb.command.multi
 import gdb.command.prompt
+import gdb.function.strcmp
 
 gdb.command.pretty_printers.register_pretty_printer_commands()
diff --git a/gdb/python/lib/gdb/function/strcmp.py b/gdb/python/lib/gdb/function/strcmp.py
new file mode 100644
index 0000000..dc7dd2d
--- /dev/null
+++ b/gdb/python/lib/gdb/function/strcmp.py
@@ -0,0 +1,67 @@
+# Copyright (C) 2011 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+import gdb
+
+class Strcmp(gdb.Function):
+    """A string-comparison function like C's strcmp.
+Usage: $_strcmp (STR1, STR2, [LEN])
+With two arguments, compare strings until a terminating NUL character.
+Return a negative value if STR1 is less than STR2, a positive
+value if STR1 is greater than STR2, or zero if STR1 and STR2 are equal.
+LEN, if specified, is the maximum number of characters to compare."""
+
+    def __init__(self):
+        super(Strcmp, self).__init__('_strcmp')
+
+    def invoke(self, s1, s2, len = None):
+        i = 0
+        while len is None or i < len:
+            c1 = s1[i]
+            c2 = s2[i]
+            if c1 < c2:
+                return -1
+            elif c1 > c2:
+                return 1
+            elif c1 == 0:
+                return 0
+            i = i + 1
+        return 0
+
+class Memcmp(gdb.Function):
+    """A memory-comparison function like C's memcmp.
+Usage: $_memcmp (MEM1, MEM2, LEN)
+Bytewise compare two regions of memory.  Return a negative value if
+MEM1 is less than MEM2, a positive value if MEM1 is greater than MEM2,
+or zero if MEM1 and MEM2 are equal.  LEN is the maximum number of
+bytes to compare."""
+
+    def __init__(self):
+        super(Memcmp, self).__init__('_memcmp')
+
+    def invoke(self, s1, s2, len):
+        i = 0
+        while i < len:
+            c1 = s1[i]
+            c2 = s2[i]
+            if c1 < c2:
+                return -1
+            elif c1 > c2:
+                return 1
+            i = i + 1
+        return 0
+
+Strcmp()
+Memcmp()


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