contrib/chg/hgclient.h

util: add a stream compression API to compression engines

It is a common pattern throughout the code to perform compression
on an iterator of chunks, yielding an iterator of compressed chunks.
Let's formalize that as part of the compression engine API.

The zlib and bzip2 implementations allow an optional "level" option
to control the compression level. The default values are the same as
what the Python modules use. This option will be used in subsequent
patches.

/*
 * A command server client that uses Unix domain socket
 *
 * Copyright (c) 2011 Yuya Nishihara <[e-mail]>
 *
 * This software may be used and distributed according to the terms of the
 * GNU General Public License version 2 or any later version.
 */

#ifndef HGCLIENT_H_
#define HGCLIENT_H_

#include <sys/types.h>

struct hgclient_tag_;
typedef struct hgclient_tag_ hgclient_t;

hgclient_t *hgc_open(const char *sockname);
void hgc_close(hgclient_t *hgc);

pid_t hgc_peerpgid(const hgclient_t *hgc);
pid_t hgc_peerpid(const hgclient_t *hgc);

const char **hgc_validate(hgclient_t *hgc, const char *const args[],
			  size_t argsize);
int hgc_runcommand(hgclient_t *hgc, const char *const args[], size_t argsize);
void hgc_attachio(hgclient_t *hgc);
const char *hgc_getpager(hgclient_t *hgc, const char *const args[],
			 size_t argsize);
void hgc_setenv(hgclient_t *hgc, const char *const envp[]);

#endif  /* HGCLIENT_H_ */