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-rw-r--r--generate-binding-glue.py111
1 files changed, 111 insertions, 0 deletions
diff --git a/generate-binding-glue.py b/generate-binding-glue.py
new file mode 100644
index 0000000..cec4fea
--- /dev/null
+++ b/generate-binding-glue.py
@@ -0,0 +1,111 @@
+#!/usr/bin/python3
+
+import sys
+
+OUT = sys.stdout
+
+def set_output(f):
+ global OUT
+ OUT = f
+
+def p(*args):
+ OUT.write('\n'.join(args))
+ OUT.write('\n')
+
+def emit_func_impl(api, f):
+ args = f.get('args', [])
+ if len(args) > 0:
+ p(' json_object *jreq = afb_req_json(req);', '')
+ for arg in args:
+ arg['jtype'] = arg.get('jtype', arg['type']) # add jtype default
+ p(' json_object *j_%(name)s = nullptr;' % arg,
+ ' if (! json_object_object_get_ex(jreq, "%(name)s", &j_%(name)s)) {' % arg,
+ ' afb_req_fail(req, "failed", "Need %(type)s argument %(name)s");' % arg,
+ ' return;',
+ ' }',
+ ' %(type)s a_%(name)s = json_object_get_%(jtype)s(j_%(name)s);' % arg, '')
+ p(' auto ret = %(api)s' % api + '%(name)s(' % f + ', '.join(map(lambda x: 'a_' + x['name'], args)) + ');')
+ p(' if (ret.is_err()) {',
+ ' afb_req_fail(req, "failed", ret.unwrap_err());',
+ ' return;',
+ ' }', '')
+ p(' afb_req_success(req, ret.unwrap(), "success");')
+
+def emit_func(api, f):
+ p('void %(impl_name)s(afb_req req) noexcept {' % f)
+ p(' if (g_afb_instance == nullptr) {',
+ ' afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");',
+ ' return;',
+ ' }', '',
+ ' try {', ' // BEGIN impl')
+ emit_func_impl(api, f)
+ p(' // END impl',
+ ' } catch (std::exception &e) {',
+ ' afb_req_fail_f(req, "failed", "Uncaught exception while calling %(name)s: %%s", e.what());' % f,
+ ' return;',
+ ' }', '')
+ p('}', '')
+
+def emit_afb_verbs(api):
+ p('const struct afb_verb_v2 %(name)s_verbs[] = {' % api)
+ for f in api['functions']:
+ p(' { "%(name)s", %(impl_name)s, nullptr, nullptr, AFB_SESSION_NONE },' % f)
+ p(' {}', '};')
+
+def emit_binding(api):
+ p('namespace {', '')
+ for func in api['functions']:
+ emit_func(api, func)
+ p('} // namespace', '')
+ emit_afb_verbs(api)
+
+def generate_names(api):
+ for f in api['functions']:
+ f['impl_name'] = '%s_%s_thunk' % (api['name'], f['name'])
+
+def emit_afb_api(api):
+ p('#include "result.hpp"', '')
+ p('#include <json-c/json.h>', '')
+ p('namespace wm {', '')
+ p('struct App;', '')
+ p('struct binding_api {')
+ p(' typedef wm::result<json_object *> result_type;')
+ p(' struct wm::App *app;')
+ for f in api['functions']:
+ p(' result_type %(name)s(' % f + ', '.join(map(lambda x: '%(type)s %(name)s' % x, f.get('args', []))) + ');')
+ p('};', '')
+ p('} // namespace wm')
+
+# names must always be valid in c and unique for each function (that is its arguments)
+# arguments will be looked up from json request, range checking needs to be implemented
+# by the actual API call
+API = {
+ 'name': 'winman',
+ 'api': 'g_afb_instance->app.api.', # where are our API functions
+ 'functions': [
+ {
+ 'name': 'register_surface',
+ #'return_type': 'int', # Or do they return all just some json?
+ 'args': [ # describes the functions arguments, and their names as found in the json request
+ { 'name': 'appid', 'type': 'uint32_t', 'jtype': 'int' }, # XXX: lookup jtypes automatically? i.e. char*|const char* would be string?
+ { 'name': 'surfaceid', 'type': 'uint32_t', 'jtype': 'int' },
+ ],
+ },
+ { 'name': 'debug_status', },
+ { 'name': 'debug_layers', },
+ { 'name': 'debug_surfaces', },
+ ]
+}
+
+def main():
+ with open('afb_binding_glue.inl', 'w') as out:
+ set_output(out)
+ p('// This file was generated, do not edit', '')
+ generate_names(API)
+ emit_binding(API)
+ with open('afb_binding_api.hpp', 'w') as out:
+ set_output(out)
+ p('// This file was generated, do not edit', '')
+ emit_afb_api(API)
+
+__name__ == '__main__' and main()