VPP-118: add support for variable length arrays to jvpp
* extends VPP's message definition language with the following syntax:
u32 count:
u8 array[count];
which is traslated to:
u32 count;
u8 array[0];
but now, python API representation generated by vppapigen
contains information about where the array length is stored.
* modifies existing response messages to use the new syntax
Change-Id: I68210bc7a3a755d03d067e9b79a567f40e2d31f3
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>
diff --git a/vpp-api/java/jvpp/gen/jvpp_c_gen.py b/vpp-api/java/jvpp/gen/jvpp_c_gen.py
index c006c34..0b7fc67 100644
--- a/vpp-api/java/jvpp/gen/jvpp_c_gen.py
+++ b/vpp-api/java/jvpp/gen/jvpp_c_gen.py
@@ -210,7 +210,10 @@
for t in zip(f['c_types'], f['args'], f['lengths']):
c_type = t[0]
c_name = t[1]
- field_length = t[2]
+ # variable length arrays do not need special handling in requests,
+ # because the length of Java array is known:
+ field_length = t[2][0]
+
java_field_name = util.underscore_to_camelcase(c_name)
struct_setter_template = struct_setter_templates[c_type]
@@ -241,6 +244,9 @@
(*env)->Set${jni_setter}(env, dto, ${java_name}FieldId, mp->${c_name});
""")
+variable_length_array_value_template = Template("""mp->${length_var_name}""")
+variable_length_array_template = Template("""clib_net_to_host_${length_field_type}(${value})""")
+
u16_dto_field_setter_template = Template("""
(*env)->Set${jni_setter}(env, dto, ${java_name}FieldId, clib_net_to_host_u16(mp->${c_name}));
""")
@@ -267,6 +273,8 @@
for (_i = 0; _i < ${field_length}; _i++) {
${java_name}ArrayElements[_i] = clib_net_to_host_u32(mp->${c_name}[_i]);
}
+
+ (*env)->ReleaseIntArrayElements(env, ${java_name}, ${java_name}ArrayElements, 0);
(*env)->SetObjectField(env, dto, ${java_name}FieldId, ${java_name});
}
""")
@@ -281,6 +289,8 @@
for (_i = 0; _i < ${field_length}; _i++) {
${java_name}ArrayElements[_i] = clib_net_to_host_u64(mp->${c_name}[_i]);
}
+
+ (*env)->ReleaseLongArrayElements(env, ${java_name}, ${java_name}ArrayElements, 0);
(*env)->SetObjectField(env, dto, ${java_name}FieldId, ${java_name});
}
""")
@@ -353,7 +363,16 @@
c_type = t[0]
jni_type = t[1]
c_name = t[2]
- field_length = t[3]
+ field_length = t[3][0]
+
+ # check if we are processing variable length array
+ if t[3][1]:
+ length_var_name = t[3][0]
+ length_field_type = f['c_types'][f['args'].index(length_var_name)]
+ field_length = variable_length_array_value_template.substitute(length_var_name=length_var_name)
+ if length_field_type != 'u8': # we need net to host conversion:
+ field_length = variable_length_array_template.substitute(
+ length_field_type=length_field_type, value=field_length)
# for retval don't generate setters and generate retval check
if util.is_retval_field(c_name):
diff --git a/vpp-api/java/jvpp/gen/jvpp_gen.py b/vpp-api/java/jvpp/gen/jvpp_gen.py
index c08593e..26bcea1 100755
--- a/vpp-api/java/jvpp/gen/jvpp_gen.py
+++ b/vpp-api/java/jvpp/gen/jvpp_gen.py
@@ -80,11 +80,15 @@
if len(i) is 3: # array type
types_list.append(vpp_2_jni_type_mapping[i[0]] + 'Array')
c_types_list.append(i[0] + '[]')
- lengths_list.append(i[2])
+ lengths_list.append((i[2], False))
+ elif len(i) is 4: # variable length array type
+ types_list.append(vpp_2_jni_type_mapping[i[0]] + 'Array')
+ c_types_list.append(i[0] + '[]')
+ lengths_list.append((i[3], True))
else: # primitive type
types_list.append(vpp_2_jni_type_mapping[i[0]])
c_types_list.append(i[0])
- lengths_list.append(0)
+ lengths_list.append((0, False))
return types_list, c_types_list, lengths_list