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Signed-off-by: George Lemon <[email protected]>
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‎README.md‎

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<p align="center">👑 Nim Bindings for LibEvent</p>
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<p align="center">
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<img src="https://github.com/openpeeps/PKG/blob/main/.github/logo.png" width="90px"><br>
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OpenPeeps repository template for developing libraries,<br>projects and other cool things. 👑 Written in Nim language
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<code>nimble install libevent</code>
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</p>
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<p align="center">
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<code>nimble install {PKG}</code>
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<a href="https://openpeeps.github.io/libevent/">API reference</a><br>
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<img src="https://github.com/openpeeps/libevent/workflows/test/badge.svg" alt="Github Actions"> <img src="https://github.com/openpeeps/libevent/workflows/docs/badge.svg" alt="Github Actions">
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</p>
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<p align="center">
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<a href="https://github.com/">API reference</a><br>
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<img src="https://github.com/openpeeps/pistachio/workflows/test/badge.svg" alt="Github Actions"> <img src="https://github.com/openpeeps/pistachio/workflows/docs/badge.svg" alt="Github Actions">
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</p>
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## About
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Libevent is an event notification library with a focus on asynchronous IO. It provides a mechanism to execute a callback function when a specific event occurs on a file descriptor or after a timeout has been reached. It also supports callbacks due to signals or regular timeouts.
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Libevent additionally provides a sophisticated framework for buffered network IO, with support for sockets, filters, rate-limiting, SSL, zero-copy file transmission, and IOCP. Libevent includes support for several useful protocols, including DNS, HTTP, and a minimal RPC framework.
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## 😍 Key Features
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- [x] Open Source | `MIT` License
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- [x] Written in Nim language
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### Requirements
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- [Libevent](https://libevent.org/) 2.1.12 or later
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- Nim 2.0 or later
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## Examples
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...
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### ❤ Contributions & Support
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- 🐛 Found a bug? [Create a new Issue](/issues)
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- 👋 Wanna help? [Fork it!](/fork)
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- 🐛 Found a bug? [Create a new Issue](https://github.com/openpeeps/libevent-nim/issues)
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- 👋 Wanna help? [Fork it!](https://github.com/openpeeps/libevent-nim/fork)
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- 😎 [Get €20 in cloud credits from Hetzner](https://hetzner.cloud/?ref=Hm0mYGM9NxZ4)
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### 🎩 License
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{PKG} | MIT license. [Made by Humans from OpenPeeps](https://github.com/openpeeps).<br>
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MIT license. [Made by Humans from OpenPeeps](https://github.com/openpeeps).<br>
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Copyright OpenPeeps & Contributors &mdash; All rights reserved.

‎libevent.nimble‎

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# Package
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version = "0.1.0"
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author = "George Lemon"
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description = "Bindings for Libevent"
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license = "MIT"
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srcDir = "src"
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# Dependencies
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requires "nim >= 2.0.0"

‎src/libevent.nim‎

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# Nim bindings for Libevent HTTP server.
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#
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# Official page: https://libevent.org/
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#
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# This module implements high-level API bindings for
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# creating an HTTP server using Libevent.
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#
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# (c) 2025 George Lemon | MIT License
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# Made by Humans from OpenPeeps
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# https://github.com/openpeeps/libevent-nim
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{.passL:"-L/opt/local/lib -levent", passC:"-I /opt/local/include".}
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import ./libevent/bindings/[buffer, bufferevent, event, http, listener]
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export buffer, bufferevent, event, http, listener

‎src/libevent/bindings/buffer.nim‎

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# Nim bindings for Libevent HTTP server.
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#
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# Official page: https://libevent.org/
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#
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# (c) 2025 George Lemon | MIT License
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# Made by Humans from OpenPeeps
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# https://github.com/openpeeps/libevent-nim
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import ./event
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{.push, importc, header:"<event2/buffer.h>".}
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type
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Evbuffer* = object
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EvbufferPtr* = object
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pos*: int64
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internal*: array[2, pointer] # Opaque, do not access directly
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EvbufferIovec* = object
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iov_base*: pointer
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iov_len*: csize_t
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EvbufferCbInfo* = object
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orig_size*: csize_t
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n_added*: csize_t
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n_deleted*: csize_t
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EvbufferCbEntry* = object
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EvbufferCbFunc* = proc(buf: ptr Evbuffer, info: ptr EvbufferCbInfo, arg: pointer) {.cdecl.}
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EvbufferRefCleanupCb* = proc(data: pointer, datalen: csize_t, extra: pointer) {.cdecl.}
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EvbufferFileSegment* = object
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EvbufferFileSegmentCleanupCb* = proc(seg: ptr EvbufferFileSegment, flags: cint, arg: pointer) {.cdecl.}
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const
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EVBUFFER_FLAG_DRAINS_TO_FD* = 1
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EVBUF_FS_CLOSE_ON_FREE* = 0x01
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EVBUF_FS_DISABLE_MMAP* = 0x02
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EVBUF_FS_DISABLE_SENDFILE* = 0x04
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EVBUF_FS_DISABLE_LOCKING* = 0x08
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EVBUFFER_CB_ENABLED* = 1
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type
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EvbufferEolStyle* = enum
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EVBUFFER_EOL_ANY,
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EVBUFFER_EOL_CRLF,
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EVBUFFER_EOL_CRLF_STRICT,
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EVBUFFER_EOL_LF,
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EVBUFFER_EOL_NUL
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EvbufferPtrHow* = enum
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EVBUFFER_PTR_SET,
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EVBUFFER_PTR_ADD
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# Core buffer functions
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proc evbuffer_new*(): ptr Evbuffer
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proc evbuffer_free*(buf: ptr Evbuffer)
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proc evbuffer_enable_locking*(buf: ptr Evbuffer, lock: pointer): cint
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proc evbuffer_lock*(buf: ptr Evbuffer)
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proc evbuffer_unlock*(buf: ptr Evbuffer)
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proc evbuffer_set_flags*(buf: ptr Evbuffer, flags: uint64): cint
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proc evbuffer_clear_flags*(buf: ptr Evbuffer, flags: uint64): cint
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proc evbuffer_get_length*(buf: ptr Evbuffer): csize_t
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proc evbuffer_get_contiguous_space*(buf: ptr Evbuffer): csize_t
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proc evbuffer_expand*(buf: ptr Evbuffer, datlen: csize_t): cint
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proc evbuffer_reserve_space*(buf: ptr Evbuffer, size: int64, vec: ptr EvbufferIovec, n_vec: cint): cint
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proc evbuffer_commit_space*(buf: ptr Evbuffer, vec: ptr EvbufferIovec, n_vecs: cint): cint
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proc evbuffer_add*(buf: ptr Evbuffer, data: pointer, datlen: csize_t): cint
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proc evbuffer_remove*(buf: ptr Evbuffer, data: pointer, datlen: csize_t): cint
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proc evbuffer_copyout*(buf: ptr Evbuffer, data_out: pointer, datlen: csize_t): int64
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proc evbuffer_copyout_from*(buf: ptr Evbuffer, pos: ptr EvbufferPtr, data_out: pointer, datlen: csize_t): int64
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proc evbuffer_remove_buffer*(src: ptr Evbuffer, dst: ptr Evbuffer, datlen: csize_t): cint
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proc evbuffer_readln*(buffer: ptr Evbuffer, n_read_out: ptr csize_t, eol_style: EvbufferEolStyle): cstring
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proc evbuffer_add_buffer*(outbuf: ptr Evbuffer, inbuf: ptr Evbuffer): cint
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proc evbuffer_add_buffer_reference*(outbuf: ptr Evbuffer, inbuf: ptr Evbuffer): cint
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proc evbuffer_add_reference*(outbuf: ptr Evbuffer, data: pointer, datlen: csize_t, cleanupfn: EvbufferRefCleanupCb, cleanupfn_arg: pointer): cint
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proc evbuffer_add_file*(outbuf: ptr Evbuffer, fd: cint, offset: int64, length: int64): cint
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proc evbuffer_file_segment_new*(fd: cint, offset: int64, length: int64, flags: cuint): ptr EvbufferFileSegment
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proc evbuffer_file_segment_free*(seg: ptr EvbufferFileSegment)
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proc evbuffer_file_segment_add_cleanup_cb*(seg: ptr EvbufferFileSegment, cb: EvbufferFileSegmentCleanupCb, arg: pointer)
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proc evbuffer_add_file_segment*(buf: ptr Evbuffer, seg: ptr EvbufferFileSegment, offset: int64, length: int64): cint
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proc evbuffer_add_printf*(buf: ptr Evbuffer, fmt: cstring): cint {.importc, varargs, header: "<event2/buffer.h>".}
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proc evbuffer_add_vprintf*(buf: ptr Evbuffer, fmt: cstring, ap: pointer): cint
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proc evbuffer_drain*(buf: ptr Evbuffer, len: csize_t): cint
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proc evbuffer_write*(buffer: ptr Evbuffer, fd: cint): cint
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proc evbuffer_write_atmost*(buffer: ptr Evbuffer, fd: cint, howmuch: int64): cint
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proc evbuffer_read*(buffer: ptr Evbuffer, fd: cint, howmuch: cint): cint
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proc evbuffer_search*(buffer: ptr Evbuffer, what: cstring, len: csize_t, start: ptr EvbufferPtr): EvbufferPtr
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proc evbuffer_search_range*(buffer: ptr Evbuffer, what: cstring, len: csize_t, start: ptr EvbufferPtr, `end`: ptr EvbufferPtr): EvbufferPtr
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proc evbuffer_ptr_set*(buffer: ptr Evbuffer, `ptr`: ptr EvbufferPtr, position: csize_t, how: EvbufferPtrHow): cint
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proc evbuffer_search_eol*(buffer: ptr Evbuffer, start: ptr EvbufferPtr, eol_len_out: ptr csize_t, eol_style: EvbufferEolStyle): EvbufferPtr
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proc evbuffer_peek*(buffer: ptr Evbuffer, len: int64, start_at: ptr EvbufferPtr, vec_out: ptr EvbufferIovec, n_vec: cint): cint
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proc evbuffer_add_cb*(buffer: ptr Evbuffer, cb: EvbufferCbFunc, cbarg: pointer): ptr EvbufferCbEntry
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proc evbuffer_remove_cb_entry*(buffer: ptr Evbuffer, ent: ptr EvbufferCbEntry): cint
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proc evbuffer_remove_cb*(buffer: ptr Evbuffer, cb: EvbufferCbFunc, cbarg: pointer): cint
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proc evbuffer_cb_set_flags*(buffer: ptr Evbuffer, cb: ptr EvbufferCbEntry, flags: uint32): cint
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proc evbuffer_cb_clear_flags*(buffer: ptr Evbuffer, cb: ptr EvbufferCbEntry, flags: uint32): cint
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proc evbuffer_pullup*(buf: ptr Evbuffer, size: int64): ptr uint8
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proc evbuffer_prepend*(buf: ptr Evbuffer, data: pointer, size: csize_t): cint
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proc evbuffer_prepend_buffer*(dst: ptr Evbuffer, src: ptr Evbuffer): cint
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proc evbuffer_freeze*(buf: ptr Evbuffer, at_front: cint): cint
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proc evbuffer_unfreeze*(buf: ptr Evbuffer, at_front: cint): cint
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proc evbuffer_defer_callbacks*(buffer: ptr Evbuffer, base: ptr event_base): cint
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proc evbuffer_add_iovec*(buffer: ptr Evbuffer, vec: ptr EvbufferIovec, n_vec: cint): csize_t

‎src/libevent/bindings/bufferevent.nim‎

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# Nim bindings for Libevent HTTP server.
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#
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# Official page: https://libevent.org/
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#
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# (c) 2025 George Lemon | MIT License
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# Made by Humans from OpenPeeps
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# https://github.com/openpeeps/libevent-nim
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import ./[event, buffer]
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import std/[os]
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# Bufferevent event codes
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const
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BEV_EVENT_READING* = 0x01
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BEV_EVENT_WRITING* = 0x02
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BEV_EVENT_EOF* = 0x10
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BEV_EVENT_ERROR* = 0x20
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BEV_EVENT_TIMEOUT* = 0x40
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BEV_EVENT_CONNECTED* = 0x80
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# Bufferevent options
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const
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BEV_OPT_CLOSE_ON_FREE* = 1 shl 0
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BEV_OPT_THREADSAFE* = 1 shl 1
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BEV_OPT_DEFER_CALLBACKS* = 1 shl 2
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BEV_OPT_UNLOCK_CALLBACKS* = 1 shl 3
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# Bufferevent flush modes
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type
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BuffereventFlushMode* = enum
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BEV_NORMAL = 0,
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BEV_FLUSH = 1,
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BEV_FINISHED = 2
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# Bufferevent trigger options
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const
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BEV_TRIG_IGNORE_WATERMARKS* = 1 shl 16
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BEV_TRIG_DEFER_CALLBACKS* = BEV_OPT_DEFER_CALLBACKS
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# Bufferevent filter result
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type
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BuffereventFilterResult* = enum
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BEV_OK = 0,
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BEV_NEED_MORE = 1,
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BEV_ERROR = 2
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# Opaque types
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type
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bufferevent* {.importc: "struct bufferevent", header: "<event2/bufferevent.h>", incompleteStruct.} = object
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ev_token_bucket_cfg* {.importc: "struct ev_token_bucket_cfg", header: "<event2/bufferevent.h>", incompleteStruct.} = object
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bufferevent_rate_limit_group* {.importc: "struct bufferevent_rate_limit_group", header: "<event2/bufferevent.h>", incompleteStruct.} = object
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# Callback types
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type
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bufferevent_data_cb* = proc(bev: ptr bufferevent, ctx: pointer) {.cdecl.}
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bufferevent_event_cb* = proc(bev: ptr bufferevent, what: cshort, ctx: pointer) {.cdecl.}
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bufferevent_filter_cb* = proc(
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src: ptr Evbuffer,
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dst: ptr Evbuffer,
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dst_limit: csize_t,
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mode: BuffereventFlushMode,
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ctx: pointer
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): BuffereventFilterResult {.cdecl.}
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# Bufferevent API
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proc bufferevent_socket_new*(base: ptr event_base, fd: evutil_socket_t, options: cint): ptr bufferevent {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_socket_connect*(bufev: ptr bufferevent, `addr`: pointer, socklen: cint): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_socket_connect_hostname*(bufev: ptr bufferevent, evdns_base: pointer, family: cint, hostname: cstring, port: cint): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_socket_connect_hostname_hints*(bufev: ptr bufferevent, evdns_base: pointer, hints_in: pointer, hostname: cstring, port: cint): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_socket_get_dns_error*(bev: ptr bufferevent): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_base_set*(base: ptr event_base, bufev: ptr bufferevent): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_base*(bev: ptr bufferevent): ptr event_base {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_priority_set*(bufev: ptr bufferevent, pri: cint): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_priority*(bufev: ptr bufferevent): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_free*(bufev: ptr bufferevent) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_setcb*(bufev: ptr bufferevent, readcb: bufferevent_data_cb, writecb: bufferevent_data_cb, eventcb: bufferevent_event_cb, cbarg: pointer) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_getcb*(bufev: ptr bufferevent, readcb_ptr: ptr bufferevent_data_cb, writecb_ptr: ptr bufferevent_data_cb, eventcb_ptr: ptr bufferevent_event_cb, cbarg_ptr: ptr pointer) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_setfd*(bufev: ptr bufferevent, fd: evutil_socket_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_replacefd*(bufev: ptr bufferevent, fd: evutil_socket_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_getfd*(bufev: ptr bufferevent): evutil_socket_t {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_underlying*(bufev: ptr bufferevent): ptr bufferevent {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_write*(bufev: ptr bufferevent, data: pointer, size: csize_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_write_buffer*(bufev: ptr bufferevent, buf: ptr Evbuffer): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_read*(bufev: ptr bufferevent, data: pointer, size: csize_t): csize_t {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_read_buffer*(bufev: ptr bufferevent, buf: ptr Evbuffer): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_input*(bufev: ptr bufferevent): ptr Evbuffer {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_output*(bufev: ptr bufferevent): ptr Evbuffer {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_enable*(bufev: ptr bufferevent, event: cshort): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_disable*(bufev: ptr bufferevent, event: cshort): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_enabled*(bufev: ptr bufferevent): cshort {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_set_timeouts*(bufev: ptr bufferevent, timeout_read: pointer, timeout_write: pointer): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_setwatermark*(bufev: ptr bufferevent, events: cshort, lowmark: csize_t, highmark: csize_t) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_getwatermark*(bufev: ptr bufferevent, events: cshort, lowmark: ptr csize_t, highmark: ptr csize_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_lock*(bufev: ptr bufferevent) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_unlock*(bufev: ptr bufferevent) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_incref*(bufev: ptr bufferevent) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_decref*(bufev: ptr bufferevent): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_flush*(bufev: ptr bufferevent, iotype: cshort, mode: BuffereventFlushMode): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_trigger*(bufev: ptr bufferevent, iotype: cshort, options: cint) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_trigger_event*(bufev: ptr bufferevent, what: cshort, options: cint) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_filter_new*(underlying: ptr bufferevent, input_filter: bufferevent_filter_cb, output_filter: bufferevent_filter_cb, options: cint, free_context: proc(ctx: pointer) {.cdecl.}, ctx: pointer): ptr bufferevent {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_pair_new*(base: ptr event_base, options: cint, pair: ptr ptr bufferevent): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_pair_get_partner*(bev: ptr bufferevent): ptr bufferevent {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc ev_token_bucket_cfg_new*(read_rate, read_burst, write_rate, write_burst: csize_t, tick_len: pointer): ptr ev_token_bucket_cfg {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc ev_token_bucket_cfg_free*(cfg: ptr ev_token_bucket_cfg) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_set_rate_limit*(bev: ptr bufferevent, cfg: ptr ev_token_bucket_cfg): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_rate_limit_group_new*(base: ptr event_base, cfg: ptr ev_token_bucket_cfg): ptr bufferevent_rate_limit_group {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_rate_limit_group_set_cfg*(group: ptr bufferevent_rate_limit_group, cfg: ptr ev_token_bucket_cfg): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_rate_limit_group_set_min_share*(group: ptr bufferevent_rate_limit_group, min_share: csize_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_rate_limit_group_free*(group: ptr bufferevent_rate_limit_group) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_add_to_rate_limit_group*(bev: ptr bufferevent, group: ptr bufferevent_rate_limit_group): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_remove_from_rate_limit_group*(bev: ptr bufferevent): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_set_max_single_read*(bev: ptr bufferevent, size: csize_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_set_max_single_write*(bev: ptr bufferevent, size: csize_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_max_single_read*(bev: ptr bufferevent): csize_t {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_max_single_write*(bev: ptr bufferevent): csize_t {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_read_limit*(bev: ptr bufferevent): csize_t {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_write_limit*(bev: ptr bufferevent): csize_t {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_max_to_read*(bev: ptr bufferevent): csize_t {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_get_max_to_write*(bev: ptr bufferevent): csize_t {.cdecl, importc, header: "<event2/bufferevent.h>".}
121+
proc bufferevent_get_token_bucket_cfg*(bev: ptr bufferevent): ptr ev_token_bucket_cfg {.cdecl, importc, header: "<event2/bufferevent.h>".}
122+
proc bufferevent_rate_limit_group_get_read_limit*(group: ptr bufferevent_rate_limit_group): csize_t {.cdecl, importc, header: "<event2/bufferevent.h>".}
123+
proc bufferevent_rate_limit_group_get_write_limit*(group: ptr bufferevent_rate_limit_group): csize_t {.cdecl, importc, header: "<event2/bufferevent.h>".}
124+
proc bufferevent_decrement_read_limit*(bev: ptr bufferevent, decr: csize_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
125+
proc bufferevent_decrement_write_limit*(bev: ptr bufferevent, decr: csize_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
126+
proc bufferevent_rate_limit_group_decrement_read*(group: ptr bufferevent_rate_limit_group, decr: csize_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
127+
proc bufferevent_rate_limit_group_decrement_write*(group: ptr bufferevent_rate_limit_group, decr: csize_t): cint {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_rate_limit_group_get_totals*(grp: ptr bufferevent_rate_limit_group, total_read_out: ptr ev_uint64_t, total_written_out: ptr ev_uint64_t) {.cdecl, importc, header: "<event2/bufferevent.h>".}
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proc bufferevent_rate_limit_group_reset_totals*(grp: ptr bufferevent_rate_limit_group) {.cdecl, importc, header: "<event2/bufferevent.h>".}

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