VPPAPIGEN: vppapigen replacement in Python PLY.

[vpp.git] / src / tools / vppapigen / JSON.py

diff --git a/src/tools/vppapigen/JSON.py b/src/tools/vppapigen/JSON.py
new file mode 100644 (file)
index 0000000..d1f47eb
--- /dev/null
+++ b/src/tools/vppapigen/JSON.py
@@ -0,0 +1,66 @@
+# JSON generation
+import json
+
+
+def walk_enums(s):
+    r = []
+    for e in s:
+        d = []
+        d.append(e.name)
+        for b in e.block:
+            d.append(b)
+        d.append({'enumtype': e.enumtype})
+        r.append(d)
+    return r
+
+
+def walk_services(s):
+    r = []
+    for e in s:
+        d = {'reply': e.reply}
+        if e.stream:
+            d['stream'] = True
+        if e.events:
+            d['events'] = e.events
+        r.append({e.caller: d})
+    return r
+
+
+def walk_defs(s):
+    r = []
+    for t in s:
+        d = []
+        d.append(t.name)
+        for b in t.block:
+            f = []
+            if b.type == 'Field':
+                f = [b.fieldtype, b.fieldname]
+            elif b.type == 'Array':
+                if b.lengthfield:
+                    f = [b.fieldtype, b.fieldname, b.length, b.lengthfield]
+                else:
+                    f = [b.fieldtype, b.fieldname, b.length]
+            else:
+                raise ValueError("Error in processing array type %s" % b)
+            d.append(f)
+        if t.crc:
+            c = {}
+            c['crc'] = "{0:#0{1}x}".format(t.crc, 10)
+            d.append(c)
+
+        r.append(d)
+    return r
+
+
+#
+# Plugin entry point
+#
+def run(filename, s, file_crc):
+    j = {}
+
+    j['types'] = walk_defs(s['typedefs'])
+    j['messages'] = walk_defs(s['defines'])
+    j['enums'] = walk_enums(s['enums'])
+    j['services'] = walk_services(s['services'])
+    j['vl_api_version'] = hex(file_crc)
+    return json.dumps(j, indent=4, separators=(',', ': '))