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0x0B — script_stop

Script stop helper. It can check a condition, resolve a character abstraction, search a script slot, and call StopScript.

proven— handler traced, and exercised by at least one shipped script.

At a glance

Opcode0x0B (11)
HandlerCRadiScript::Command_0b
SignatureCRadiScript::Command_0b(int,SCR_DATA*,unsigned int,unsigned int)
Translation unitr_script_run0.cpp
Address— debug build; click for all 3
Handler size0x17C (380 bytes)
Engine namescript_stop
FamilyScript control, flags and values
Command size4 + extra_words * 4 bytes

Handler behaviour

Script stop helper. It can check a condition, resolve a character abstraction, search a script slot, and call StopScript.

Encoding

The command header is one 32-bit word, as described in §3 Instruction encoding:

 31            24 23            16 15             8 7              0
+----------------+----------------+----------------+----------------+
|  flags         |  argument byte |  extra words   |  0x0B          |
+----------------+----------------+----------------+----------------+

Bits 8–15 give the number of 32-bit operand words that follow. Bits 16–23 are handed to the handler as a bitfield; on character commands bit 0 normally says whether a character selector word is present. Bit 31 is the keep-going bit.

Operand fields

10 documented fields. input fields are read from the command's operand words; derived fields are computed from other fields rather than stored separately.

FieldRoleMeaning
characterinputThe packed 32-bit character selector word. Its low half is the character id and byte 2 is a secondary class/variant input; see character_number and character_variant.
cond_basederivedLow 7 bits of condition: which condition is evaluated.
conditionderivedCondition selector byte. The low 7 bits pick the condition (cond_base) and bit 7 inverts the result (invert). 0 means unconditional.
invertinputBit 7 of condition: when 1 the condition result is inverted.
lookup_script_idinputIdentifier selecting which lookup script to use.
modeinputHandler path selector taken from the argument byte. The meaning is specific to each command.
script_idinputIdentifier selecting which script to use.
script_lookup_controlinputBitmask controlling which optional script lookup values follow.
selectorinputSub-selector byte choosing which variant of the command's behaviour runs.
yieldderivedPause the script here for one game frame; the next command runs on the following update. Lines without it keep running immediately.

Engine calls

Engine functions this handler was observed calling:

  • CRadiScript::CheckCondition(unsigned char,unsigned long,const SCR_DATA*)
  • CRadiScript::GetAbstractionCharacterNumber(unsigned int&,unsigned int&,const SCR_DATA*)
  • CRadiScript::SearchScriptSlot(unsigned int,unsigned int,int,int,unsigned int)
  • CRadiScript::StopScript(SCR_DATA*)

Bit masks

Masks the handler applies to its argument byte or operand words:

0xFFFF 0x000F 0x00FF 0x0010