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/* =========================================================================
zstr - sending and receiving strings
Copyright (c) the Contributors as noted in the AUTHORS file.
This file is part of CZMQ, the high-level C binding for 0MQ:
http://czmq.zeromq.org.
This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.
=========================================================================
*/
#ifndef __ZSTR_H_INCLUDED__
#define __ZSTR_H_INCLUDED__
#ifdef __cplusplus
extern "C" {
#endif
// @warning THE FOLLOWING @INTERFACE BLOCK IS AUTO-GENERATED BY ZPROJECT
// @warning Please edit the model at "api/zstr.api" to make changes.
// @interface
// This is a stable class, and may not change except for emergencies. It
// is provided in stable builds.
// This class has draft methods, which may change over time. They are not
// in stable releases, by default. Use --enable-drafts to enable.
// Receive C string from socket. Caller must free returned string using
// zstr_free(). Returns NULL if the context is being terminated or the
// process was interrupted.
// Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
zstr_recv (void *source);
// Receive a series of strings (until NULL) from multipart data.
// Each string is allocated and filled with string data; if there
// are not enough frames, unallocated strings are set to NULL.
// Returns -1 if the message could not be read, else returns the
// number of strings filled, zero or more. Free each returned string
// using zstr_free(). If not enough strings are provided, remaining
// multipart frames in the message are dropped.
CZMQ_EXPORT int
zstr_recvx (void *source, char **string_p, ...);
// Send a C string to a socket, as a frame. The string is sent without
// trailing null byte; to read this you can use zstr_recv, or a similar
// method that adds a null terminator on the received string. String
// may be NULL, which is sent as "".
CZMQ_EXPORT int
zstr_send (void *dest, const char *string);
// Send a C string to a socket, as zstr_send(), with a MORE flag, so that
// you can send further strings in the same multi-part message.
CZMQ_EXPORT int
zstr_sendm (void *dest, const char *string);
// Send a formatted string to a socket. Note that you should NOT use
// user-supplied strings in the format (they may contain '%' which
// will create security holes).
CZMQ_EXPORT int
zstr_sendf (void *dest, const char *format, ...) CHECK_PRINTF (2);
// Send a formatted string to a socket, as for zstr_sendf(), with a
// MORE flag, so that you can send further strings in the same multi-part
// message.
CZMQ_EXPORT int
zstr_sendfm (void *dest, const char *format, ...) CHECK_PRINTF (2);
// Send a series of strings (until NULL) as multipart data
// Returns 0 if the strings could be sent OK, or -1 on error.
CZMQ_EXPORT int
zstr_sendx (void *dest, const char *string, ...);
// Free a provided string, and nullify the parent pointer. Safe to call on
// a null pointer.
CZMQ_EXPORT void
zstr_free (char **string_p);
// Self test of this class.
CZMQ_EXPORT void
zstr_test (bool verbose);
#ifdef CZMQ_BUILD_DRAFT_API
// *** Draft method, for development use, may change without warning ***
// De-compress and receive C string from socket, received as a message
// with two frames: size of the uncompressed string, and the string itself.
// Caller must free returned string using zstr_free(). Returns NULL if the
// context is being terminated or the process was interrupted.
// Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
zstr_recv_compress (void *source);
// *** Draft method, for development use, may change without warning ***
// Compress and send a C string to a socket, as a message with two frames:
// size of the uncompressed string, and the string itself. The string is
// sent without trailing null byte; to read this you can use
// zstr_recv_compress, or a similar method that de-compresses and adds a
// null terminator on the received string.
CZMQ_EXPORT int
zstr_send_compress (void *dest, const char *string);
// *** Draft method, for development use, may change without warning ***
// Compress and send a C string to a socket, as zstr_send_compress(),
// with a MORE flag, so that you can send further strings in the same
// multi-part message.
CZMQ_EXPORT int
zstr_sendm_compress (void *dest, const char *string);
// *** Draft method, for development use, may change without warning ***
// Accepts a void pointer and returns a fresh character string. If source
// is null, returns an empty string.
// Caller owns return value and must destroy it when done.
CZMQ_EXPORT char *
zstr_str (void *source);
#endif // CZMQ_BUILD_DRAFT_API
// @end
// DEPRECATED as poor style -- callers should use zloop or zpoller
// Receive C string from socket, if socket had input ready. Caller must
// free returned string using zstr_free. Returns NULL if there was no input
// waiting, or if the context was terminated. Use zctx_interrupted to exit
// any loop that relies on this method.
CZMQ_EXPORT char *
zstr_recv_nowait (void *source);
// Compiler hints
CZMQ_EXPORT int zstr_sendf (void *dest, const char *format, ...) CHECK_PRINTF (2);
#ifdef __cplusplus
}
#endif
#endif