src/server/util/writer.h

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright 2018 Olaf Wintermann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *
 *   2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef WRITER_H
#define WRITER_H

#include "../public/nsapi.h"
#include <cx/string.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef ssize_t (*wr_writefunc)(void *, const char *, size_t);
    
typedef struct Writer {
    void *fd;
    wr_writefunc write;
    char *buffer;
    size_t size;
    size_t pos;
    int error;
} Writer;

#define writer_put_lit(w, str) writer_put(w, str, sizeof(str)-1)
#define writer_put_str(w, str) writer_put(w, str, strlen(str))

void writer_init(Writer *w, SYS_NETFD fd, char *buf, size_t len);

void writer_init_with_stream(Writer *w, void *stream, wr_writefunc writefunc, char *buf, size_t len);

int writer_flush(Writer *w);

int writer_put(Writer *w, const char *s, size_t len);

int writer_puts(Writer *w, cxstring s);

int writer_putc(Writer *w, char c);

int writer_fwrite(const void *s, size_t size, size_t nelem, Writer *w);

#ifdef __cplusplus
}
#endif

#endif /* WRITER_H */