[Qemu-devel] [PATCH v6 3/3] qapi: Suppress unwanted space between type and identifier

[Amos Kong <akong@redhat.com>]

We always generate a space between type and identifier in parameter
and variable declarations, even when idiomatic C style doesn't have
a space there.  Suppress it.

Signed-off-by: Amos Kong <akong@redhat.com>
---
 scripts/qapi-commands.py |  4 ++--
 scripts/qapi.py          | 23 +++++++++++++++++------
 2 files changed, 19 insertions(+), 8 deletions(-)

diff --git a/scripts/qapi-commands.py b/scripts/qapi-commands.py
index 34f200a..053ba85 100644
--- a/scripts/qapi-commands.py
+++ b/scripts/qapi-commands.py
@@ -102,7 +102,7 @@ def gen_visitor_input_vars_decl(args):
 bool has_%(argname)s = false;
 ''',
                          argname=c_var(argname))
-        if c_type(argtype).endswith("*"):
+        if is_c_ptr(argtype):
             ret += mcgen('''
 %(argtype)s %(argname)s = NULL;
 ''',
@@ -227,7 +227,7 @@ def gen_marshal_input(name, args, ret_type, middle_mode):
 ''')
 
     if ret_type:
-        if c_type(ret_type).endswith("*"):
+        if is_c_ptr(ret_type):
             retval = "    %s retval = NULL;" % c_type(ret_type)
         else:
             retval = "    %s retval;" % c_type(ret_type)
diff --git a/scripts/qapi.py b/scripts/qapi.py
index dc690bb..0079194 100644
--- a/scripts/qapi.py
+++ b/scripts/qapi.py
@@ -470,11 +470,17 @@ def find_enum(name):
 def is_enum(name):
     return find_enum(name) != None
 
+eatspace = '\033EATSPACE.'
+
+# A special suffix is added in c_type() for pointer types, and it's
+# stripped in mcgen(). So please notice this when you check the return
+# value of c_type() outside mcgen().
 def c_type(name, is_param=False):
     if name == 'str':
         if is_param:
-            return 'const char *'
-        return 'char *'
+            return 'const char *' + eatspace
+        return 'char *' + eatspace
+
     elif name == 'int':
         return 'int64_t'
     elif (name == 'int8' or name == 'int16' or name == 'int32' or
@@ -488,15 +494,19 @@ def c_type(name, is_param=False):
     elif name == 'number':
         return 'double'
     elif type(name) == list:
-        return '%s *' % c_list_type(name[0])
+        return '%s *%s' % (c_list_type(name[0]), eatspace)
     elif is_enum(name):
         return name
     elif name == None or len(name) == 0:
         return 'void'
     elif name == name.upper():
-        return '%sEvent *' % camel_case(name)
+        return '%sEvent *%s' % (camel_case(name), eatspace)
     else:
-        return '%s *' % name
+        return '%s *%s' % (name, eatspace)
+
+def is_c_ptr(name):
+    suffix = "*" + eatspace
+    return c_type(name).endswith(suffix)
 
 def genindent(count):
     ret = ""
@@ -521,7 +531,8 @@ def cgen(code, **kwds):
     return '\n'.join(lines) % kwds + '\n'
 
 def mcgen(code, **kwds):
-    return cgen('\n'.join(code.split('\n')[1:-1]), **kwds)
+    raw = cgen('\n'.join(code.split('\n')[1:-1]), **kwds)
+    return re.sub(re.escape(eatspace) + ' *', '', raw)
 
 def basename(filename):
     return filename.split("/")[-1]
-- 
1.9.3