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authorOle Troan <ot@cisco.com>2017-10-12 13:06:35 +0200
committerNeale Ranns <nranns@cisco.com>2018-01-23 13:03:53 +0000
commit9d42087149a6870965896be74dc6260f72d2cac9 (patch)
treef86ed97a4b28845934aeb5fbc9dd4e33b9bdfdac /src/tools/vppapigen/JSON.py
parent2aa22909c70ff5c5eed6a7f7a0f8a587c9260da8 (diff)
VPPAPIGEN: vppapigen replacement in Python PLY.
This is a version of the VPP API generator in Python PLY. It supports the existing language, and has a plugin architecture for generators. Currently C and JSON are supported. Changes: - vl_api_version to option version = "major.minor.patch" - enum support - Added error checking and reporting - import support (removed the C pre-processor) - services (tying request/reply together) Version: option version = "1.0.0"; Enum: enum colours { RED, BLUE = 50, }; define foo { vl_api_colours_t colours; }; Services: service { rpc foo returns foo_reply; rpc foo_dump returns stream foo_details; rpc want_stats returns want_stats_reply events ip4_counters, ip6_counters; }; Future planned features: - unions - bool, text - array support (including length) - proto3 output plugin - Refactor C/C++ generator as a plugin - Refactor Java generator as a plugin Change-Id: Ifa289966c790e1b1a8e2938a91e69331e3a58bdf Signed-off-by: Ole Troan <ot@cisco.com>
Diffstat (limited to 'src/tools/vppapigen/JSON.py')
-rw-r--r--src/tools/vppapigen/JSON.py66
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diff --git a/src/tools/vppapigen/JSON.py b/src/tools/vppapigen/JSON.py
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+++ b/src/tools/vppapigen/JSON.py
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+# 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=(',', ': '))