+ if messages:
+ count_required_fields = lambda m: len([f for f in msg.fields if f.htype == 'PB_HTYPE_REQUIRED'])
+ largest_msg = max(messages, key = count_required_fields)
+ largest_count = count_required_fields(largest_msg)
+ if largest_count > 64:
+ yield '\n/* Check that missing required fields will be properly detected */\n'
+ yield '#if PB_MAX_REQUIRED_FIELDS < %d\n' % largest_count
+ yield '#error Properly detecting missing required fields in %s requires \\\n' % largest_msg.name
+ yield ' setting PB_MAX_REQUIRED_FIELDS to %d or more.\n' % largest_count
+ yield '#endif\n'
+
+ worst = 0
+ worst_field = ''
+ checks = []
+ for msg in messages:
+ for field in msg.fields:
+ status = field.largest_field_value()
+ if isinstance(status, (str, unicode)):
+ checks.append(status)
+ elif status > worst:
+ worst = status
+ worst_field = str(field.struct_name) + '.' + str(field.name)
+
+ if worst > 255 or checks:
+ yield '\n/* Check that field information fits in pb_field_t */\n'
+
+ if worst < 65536:
+ yield '#if !defined(PB_FIELD_16BIT) && !defined(PB_FIELD_32BIT)\n'
+ if worst > 255:
+ yield '#error Field descriptor for %s is too large. Define PB_FIELD_16BIT to fix this.\n' % worst_field
+ else:
+ assertion = ' && '.join(str(c) + ' < 256' for c in checks)
+ yield 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_16BIT)\n' % assertion
+ yield '#endif\n\n'
+
+ if worst > 65535 or checks:
+ yield '#if !defined(PB_FIELD_32BIT)\n'
+ if worst > 65535:
+ yield '#error Field descriptor for %s is too large. Define PB_FIELD_32BIT to fix this.\n' % worst_field
+ else:
+ assertion = ' && '.join(str(c) + ' < 65536' for c in checks)
+ yield 'STATIC_ASSERT((%s), YOU_MUST_DEFINE_PB_FIELD_32BIT)\n' % assertion
+ yield '#endif\n'
+
+ # End of header