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41 lines
1.3 KiB
41 lines
1.3 KiB
2 months ago
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Growing buffers
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===============
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*This module is obsolete. Please use <<gary:,growing arrays>> instead.*
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It is quite usual situation when you need an array of items and you
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don not know how large it will be in the time you allocate it. Then
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you need some kind of dynamically growing buffer.
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- <<gbuf,Generic growing buffers>>
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- <<bbuf,Growing buffers for byte-sized items>>
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[[gbuf]]
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Generic growing buffers
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-----------------------
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The generic buffers are in `ucw/gbuf.h`. They are <<generic:,generics
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generated by preprocessor>>. To use them, you need to define:
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- `GBUF_PREFIX(name)` -- the identifier generating macro.
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- `GBUF_TYPE` -- the data type they operate with.
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You may define `GBUF_TRACE(\...)` macro. If you do, it will be used to
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log the growing of the buffer. The macro should act like printf() --
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the first parameter will be format, the rest variables for it.
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!!ucw/gbuf.h GBUF_PREFIX
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[[bbuf]]
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Growing buffers for byte-sized items
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------------------------------------
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It is often needed to allocate the buffer by bytes (if you handle some
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anonymous data) or characters (strings of unknown length).
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With the `ucw/bbuf.h` header, you get an instance of growing buffers
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with type `byte` and prefix `bb_`. Aside from that, you get few
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functions to manipulate strings in the buffers.
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!!ucw/bbuf.h
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