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Language::Zcode::Runtime::State 0.8

  Date Added: June 16, 2010  |  Visits: 643

Language::Zcode::Runtime::State

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Language::Zcode::Runtime::State is a Perl module to handle saving, restoring, etc. the game state. restoring Getter/setter: currently in the process of restoring or not? start_machine Start executing the Z-machine. In the normal case (starting a new game, or restarting), this is as simple as calling the Z-machine subroutine whose address is stored in the header. If were restoring from a save file, its more complicated. See "resume_execution". z_call Wrapper around Z-code subroutine calls. The main reason we need it is for save/restore. In the normal case, z_call just calls the Z-code subroutine at address arg0 with the given args (arg5-argn), if any. Args 1-4 arent used by z_call, but (hack alert!) they go into the Perl call stack, which is needed for saving Z-machine state. Input: subroutine address to call, local variables & eval stack (arrayrefs), next PC, store variable, args to the Z-sub. See "The call stack" for far more detail on this sub and save/restore. save_state Implement the @save opcode, saving the current Z-machine state (as opposed to writing a table to a file, the other use of the @save opcode) Note that this sub also gets called at the very end of the restoring process. Returns 0 for failed save, 1 for successful save, 2 for "just finished restoring". build_save_stack Create a Z-machine call stack by peeking at the Perl call stack. When calling Z_machine subroutines, we call z_call with all the information contained in a Z stack frame. We retrieve that information from the Perl call stack and build a Z-machine call stack with it. restore_state Implement the @restore opcode, restoring the current Z-machine state (as opposed to reading a table from a file, the other use of the @restore opcode).

Requirements: No special requirements
Platforms: Linux
Keyword: Call Stack Languagezcoderuntimestate Libraries Perl Perl Module Programming Restoring Save Stack State Z-machine
Users rating: 0/10

License: Freeware Size: 296.96 KB
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