core-lightning/tools/gen/print_impl_template
Rusty Russell b19f3a5e7f devtools/decodemsg: don't require --onion for onion tlvs, fail if unknown tlvname.
Generate a table, let decodemsg sort it out.  Do more up-front work in
argparsing too.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2022-03-25 13:55:44 +10:30

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/* This file was generated by generate-wire.py */
/* Do not modify this file! Modify the .csv file it was generated from. */
#include <${header_filename}>
#include <ccan/array_size/array_size.h>
#include <ccan/mem/mem.h>
#include <ccan/tal/str/str.h>
#include <common/utils.h>
#include <inttypes.h>
#include <stdio.h>
% for i in includes:
${i}
% endfor
% if enum_sets:
bool print${options.enum_name}_message(const u8 *msg)
{
switch ((enum ${options.enum_name})fromwire_peektype(msg)) {
% for msg in enum_sets[0]['set']:
case ${msg.enum_name()}:
printf("${msg.enum_name()}:\n");
return printwire_${msg.name}("${msg.name}", msg);
% endfor
}
printf("UNKNOWN: %s\\n", tal_hex(msg, msg));
return false;
}
% endif
## 'component' for 'truncate check
<%def name="truncate_check()">
if (!*cursor) {
printf("**TRUNCATED**\n");
return false;
}
</%def> \
## definition for printing field sets
<%def name="print_fieldset(fields)">
% for f in fields:
% if f.is_extension():
if (*plen == 0)
return true;
printf("(${','.join(f.extension_names)}):");
% endif
% if f.len_field_of:
${f.type_obj.type_name()} ${f.name} = fromwire_${f.type_obj.name}(cursor, plen);${truncate_check()} <% continue %> \
% endif
printf("${f.name}=");
% if f.type_obj.is_tlv():
printwire_${f.type_obj.tlv.name}(tal_fmt(NULL, "%s.${f.name}", fieldname), cursor, plen);
% elif f.is_array() or f.is_varlen():
% if f.type_obj.has_array_helper():
printwire_${f.type_obj.name}_array(tal_fmt(NULL, "%s.${f.name}", fieldname), cursor, plen, ${f.size('*plen')});
% else:
printf("[");
% if f.is_implicit_len():
while (*plen) {
% else:
for (size_t i = 0; i < ${f.size()}; i++) {
% endif
if (!printwire_${f.type_obj.name}(tal_fmt(NULL, "%s.${f.name}", fieldname), cursor, plen))
return false;
}
printf("]");
% endif
% else:
if (!printwire_${f.type_obj.name}(tal_fmt(NULL, "%s.${f.name}", fieldname), cursor, plen))
return false;
% endif
% endfor
</%def> \
## Definitions for 'subtypes'
% for subtype in subtypes:
<%
static = '' if options.expose_subtypes else 'static '
%>\
${static}bool printwire_${subtype.name}(const char *fieldname, const u8 **cursor, size_t *plen)
{
${print_fieldset(subtype.fields.values())}
return true;
}
% endfor
% for tlv in tlvs.values():
% for msg in tlv.messages.values():
static bool printwire_${msg.struct_name()}(const char *fieldname, const u8 **cursor, size_t *plen)
{
printf("(msg_name=%s)\n", "${msg.name}");
${print_fieldset(msg.fields.values())}
return true;
}
% endfor
static const struct tlv_print_record_type print_tlvs_${tlv.name}[] = {
% for msg in tlv.messages.values():
{ ${msg.number}, printwire_${msg.struct_name()} },
% endfor
};
% endfor
% for msg in messages:
bool printwire_${msg.name}(const char *fieldname, const u8 *msg)
{
size_t msglen = tal_count(msg);
const u8 **cursor = &msg;
size_t *plen = &msglen;
if (fromwire_u16(cursor, plen) != ${msg.enum_name()}) {
printf("WRONG TYPE?!\n");
return false;
}
${print_fieldset(msg.fields.values())}
## Length check
if (*plen != 0)
printf("EXTRA: %s\n", tal_hexstr(NULL, *cursor, *plen));
return *cursor != NULL;
}
% endfor
% for tlv in tlvs.values():
bool printwire_${tlv.name}(const char *fieldname, const u8 **cursor, size_t *plen)
{
return printwire_tlvs(fieldname, cursor, plen, print_tlvs_${tlv.name}, ARRAY_SIZE(print_tlvs_${tlv.name}));
}
% endfor
const struct tlv_print${options.enum_name}_byname tlvs_print${options.enum_name}_byname[] = {
% for tlv in tlvs.values():
{ "${tlv.name}", printwire_${tlv.name} },
% endfor
{ NULL, NULL }
};