Trf_CreateCtrlBlock(3)

✨ Trf_CreateCtrlBlock ✨

okay so bestie, welcome to Trf_CreateCtrlBlock from section 3 of the library functions manual 🫶 this is the one where you (yes you, the plugin author) get to build the actual control structure that makes an encoder or decoder go brrr. it's giving very much "you're the main character of the transform pipeline" 💅

💖 NAME 💖

Trf_CreateCtrlBlock — literally the interface to the procedure for creation of encoder/decoder control structures. that's it, that's the job, no cap 🌸

🎀 SYNOPSIS 🎀

#include <transform.h>

Trf_ControlBlock Trf_CreateCtrlBlock
(
     ClientData writeClientData,
     Trf_WriteProc *fun,
     Trf_Options optInfo,
     Tcl_Interp *interp,
     ClientData clientData
);

look at that signature, she's gorgeous, copy her exactly 😌

🌈 PARAMETERS 🌈

• ClientData writeClientData — just some arbitrary info you hand over as clientdata to fun. whatever you want it to be, bestie, it's yours 🍓
• Trf_WriteProc *fun — the vector you use for writing out the generated results. this is the little machine that spits out the goods ✨
• Trf_Options optInfo — the options that configure the control. the settings menu, basically 🎛️
• Tcl_Interp *interp — the interpreter, there for when things go sideways and you gotta leave an error message 💀
• ClientData clientData — more arbitrary information, exactly as defined in Trf_TypeDefinition.clientData. not vibes-based, it's defined, iykyk 👑

🦋 DESCRIPTION 🦋

so the whole point: this procedure has to create a control structure for an encoder/decoder. that's the assignment, no skipping it 💅

that structure must be initialized with the contents of the option container. like, the options go in, the initialized control comes out. that's the pipeline 🫶

the return value is an opaque handle of the control structure — and ngl the original manpage literally typo'd it as "aof" which is lowkey iconic of it 😭 — or NULL if it failed. no handle, no party.

and if it does fail? you gotta leave an error message in the result area of the interpreter you were handed. interp said "hold my error message" and you better deliver 💖

🌟 SEE ALSO 🌟

the whole friend group, all invited to the function ✨ go read these too, they're all connected:

Trf_Init(3), Trf_SafeInit(3), Trf_IsInitialized(3), Trf_CreateOptions(3), Trf_DeleteOptions(3), Trf_CheckOptions(3), Trf_SetOption(3), Trf_SetObjOption(3), Trf_QueryOptions(3), Trf_SeekQueryOptions(3), Trf_WriteProc(3), Trf_DeleteCtrlBlock(3), Trf_TransformCharacter(3), Trf_TransformBuffer(3), Trf_FlushTransformation(3), Trf_ClearCtrlBlock(3), Trf_QueryMaxRead(3), Trf_Register(3), Trf_ConverterOptions(3), Trf_MDStart(3), Trf_MDUpdate(3), Trf_MDUpdateBuf(3), Trf_MDFinal(3), Trf_MDCheck(3), Trf_RegisterMessageDigest(3), Trf_LoadLibrary(3), Trf_XorBuffer(3), Trf_ShiftRegister(3), Trf_FlipRegisterShort(3), Trf_FlipRegisterLong(3), Trf_InitStubs(3)

and that's a wrap, bestie 💜 this page came to you courtesy of c2man from transform.h, dated 27 August 2002 — yeah she's vintage, she's a classic, and she still eats 🎀 Trf_CreateCtrlBlock(3) out, periodt ✨