src/tools/vppapigen/JSON.py

   1 # JSON generation
   2 import json
   3
   4
   5 def walk_enums(s):
   6     r = []
   7     for e in s:
   8         d = []
   9         d.append(e.name)
  10         for b in e.block:
  11             d.append(b)
  12         d.append({'enumtype': e.enumtype})
  13         r.append(d)
  14     return r
  15
  16
  17 def walk_services(s):
  18     r = []
  19     for e in s:
  20         d = {'reply': e.reply}
  21         if e.stream:
  22             d['stream'] = True
  23         if e.events:
  24             d['events'] = e.events
  25         r.append({e.caller: d})
  26     return r
  27
  28
  29 def walk_defs(s):
  30     r = []
  31     for t in s:
  32         d = []
  33         d.append(t.name)
  34         for b in t.block:
  35             f = []
  36             if b.type == 'Field':
  37                 f = [b.fieldtype, b.fieldname]
  38             elif b.type == 'Array':
  39                 if b.lengthfield:
  40                     f = [b.fieldtype, b.fieldname, b.length, b.lengthfield]
  41                 else:
  42                     f = [b.fieldtype, b.fieldname, b.length]
  43             else:
  44                 raise ValueError("Error in processing array type %s" % b)
  45             d.append(f)
  46         if t.crc:
  47             c = {}
  48             c['crc'] = "{0:#0{1}x}".format(t.crc, 10)
  49             d.append(c)
  50
  51         r.append(d)
  52     return r
  53
  54
  55 #
  56 # Plugin entry point
  57 #
  58 def run(filename, s, file_crc):
  59     j = {}
  60
  61     j['types'] = walk_defs(s['typedefs'])
  62     j['messages'] = walk_defs(s['defines'])
  63     j['enums'] = walk_enums(s['enums'])
  64     j['services'] = walk_services(s['services'])
  65     j['vl_api_version'] = hex(file_crc)
  66     return json.dumps(j, indent=4, separators=(',', ': '))