[Qemu-devel] [PATCH v3 08/14] qapi: Make c_type() consistently convert qapi names

[Eric Blake <eblake@redhat.com>]

Continuing the string of cleanups for supporting downstream names
containing '.', this patch focuses on ensuring c_type() can
handle a downstream name.  This patch alone does not fix the
places where generator output should be calling this function
but was open-coding things instead, but it gets us a step closer.

Note that we generate a List type for our builtins; the code has
to make sure that ['int'] maps to 'intList' (and not 'q_intList'),
and that a member with type 'int' still maps to the C type 'int';
on the other hand, a member with a name of 'int' will still map
to 'q_int' when going through c_name().  This patch had to teach
type_name() to special-case builtins, since it is used by
c_list_type() which in turn feeds c_type().

Signed-off-by: Eric Blake <eblake@redhat.com>
---
 scripts/qapi.py | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/scripts/qapi.py b/scripts/qapi.py
index b9822c6..a1dfc85 100644
--- a/scripts/qapi.py
+++ b/scripts/qapi.py
@@ -769,6 +769,9 @@ def c_enum_const(type_name, const_name):

 c_name_trans = string.maketrans('.-', '__')

+# This function is used for converting the name portion of 'name':'type'
+# into a valid C name, for use as a struct member or substring of a
+# function name.
 def c_name(name, protect=True):
     # ANSI X3J11/88-090, 3.1.1
     c89_words = set(['auto', 'break', 'case', 'char', 'const', 'continue',
@@ -800,13 +803,18 @@ def c_name(name, protect=True):
         return "q_" + name
     return name.translate(c_name_trans)

+# This function is used for computing the C type of a 'member':['name'] array.
 def c_list_type(name):
-    return '%sList' % name
+    return type_name(name) + 'List'

+# This function is used for converting the type of 'member':'name' into a
+# substring for use in C pointer types or function names.
 def type_name(name):
     if type(name) == list:
         return c_list_type(name[0])
-    return name
+    if name in builtin_types.keys():
+        return name
+    return c_name(name)

 def add_name(name, info, meta, implicit = False):
     global all_names
@@ -864,6 +872,7 @@ def is_enum(name):

 eatspace = '\033EATSPACE.'

+# This function is used for computing the full C type of 'member':'name'.
 # 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().
@@ -888,13 +897,13 @@ def c_type(name, is_param=False):
     elif type(name) == list:
         return '%s *%s' % (c_list_type(name[0]), eatspace)
     elif is_enum(name):
-        return name
+        return c_name(name)
     elif name == None or len(name) == 0:
         return 'void'
     elif name in events:
         return '%sEvent *%s' % (camel_case(name), eatspace)
     else:
-        return '%s *%s' % (name, eatspace)
+        return '%s *%s' % (c_name(name), eatspace)

 def is_c_ptr(name):
     suffix = "*" + eatspace
-- 
2.1.0