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/*
* uhub - A tiny ADC p2p connection hub
* Copyright (C) 2007-2011, Jan Vidar Krey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "uhub.h"
#define CBUF_FLAG_CONST_BUFFER 0x01
struct cbuffer
{
size_t capacity;
size_t size;
size_t flags;
char* buf;
};
extern struct cbuffer* cbuf_create(size_t capacity)
{
struct cbuffer* buf = hub_malloc(sizeof(struct cbuffer));
buf->capacity = capacity;
buf->size = 0;
buf->flags = 0;
buf->buf = hub_malloc(capacity + 1);
buf->buf[0] = '\0';
return buf;
}
struct cbuffer* cbuf_create_const(const char* buffer)
{
struct cbuffer* buf = hub_malloc(sizeof(struct cbuffer));
buf->capacity = 0;
buf->size = strlen(buffer);
buf->flags = CBUF_FLAG_CONST_BUFFER;
buf->buf = (char*) buffer;
return buf;
}
void cbuf_destroy(struct cbuffer* buf)
{
if (!(buf->flags & CBUF_FLAG_CONST_BUFFER))
{
hub_free(buf->buf);
}
hub_free(buf);
}
void cbuf_resize(struct cbuffer* buf, size_t capacity)
{
uhub_assert(buf->flags == 0);
buf->capacity = capacity;
buf->buf = hub_realloc(buf->buf, capacity + 1);
}
void cbuf_append_bytes(struct cbuffer* buf, const char* msg, size_t len)
{
uhub_assert(buf->flags == 0);
if (buf->size + len >= buf->capacity)
cbuf_resize(buf, buf->size + len);
memcpy(buf->buf + buf->size, msg, len);
buf->size += len;
buf->buf[buf->size] = '\0';
}
void cbuf_append(struct cbuffer* buf, const char* msg)
{
size_t len = strlen(msg);
uhub_assert(buf->flags == 0);
cbuf_append_bytes(buf, msg, len);
}
void cbuf_append_format(struct cbuffer* buf, const char* format, ...)
{
static char tmp[1024];
va_list args;
int bytes;
uhub_assert(buf->flags == 0);
va_start(args, format);
bytes = vsnprintf(tmp, 1024, format, args);
va_end(args);
cbuf_append_bytes(buf, tmp, bytes);
}
void cbuf_append_strftime(struct cbuffer* buf, const char* format, const struct tm* tm)
{
static char tmp[1024];
int bytes;
uhub_assert(buf->flags == 0);
bytes = strftime(tmp, sizeof(tmp), format, tm);
cbuf_append_bytes(buf, tmp, bytes);
}
const char* cbuf_get(struct cbuffer* buf)
{
return buf->buf;
}
size_t cbuf_size(struct cbuffer* buf)
{
return buf->size;
}
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