mysqlnd_read_buffer.c

/*
 +----------------------------------------------------------------------+
 | Copyright (c) The PHP Group |
 +----------------------------------------------------------------------+
 | This source file is subject to version 3.01 of the PHP license, |
 | that is bundled with this package in the file LICENSE, and is |
 | available through the world-wide-web at the following url: |
 | https://www.php.net/license/3_01.txt |
 | If you did not receive a copy of the PHP license and are unable to |
 | obtain it through the world-wide-web, please send a note to |
 | license@php.net so we can mail you a copy immediately. |
 +----------------------------------------------------------------------+
 | Authors: Andrey Hristov <andrey@php.net> |
 | Ulf Wendel <uw@php.net> |
 +----------------------------------------------------------------------+
*/

#include"php.h"
#include"mysqlnd.h"
#include"mysqlnd_debug.h"
#include"mysqlnd_read_buffer.h"


/* {{{ mysqlnd_read_buffer_is_empty */
staticbool
mysqlnd_read_buffer_is_empty(constMYSQLND_READ_BUFFER*constbuffer)
{
returnbuffer->len? FALSE:TRUE;
}
/* }}} */


/* {{{ mysqlnd_read_buffer_read */
staticvoid
mysqlnd_read_buffer_read(MYSQLND_READ_BUFFER*buffer, constsize_tcount, zend_uchar*dest)
{
if (buffer->len >= count) {
memcpy(dest, buffer->data+buffer->offset, count);
buffer->offset+=count;
buffer->len-=count;
 }
}
/* }}} */


/* {{{ mysqlnd_read_buffer_bytes_left */
staticsize_t
mysqlnd_read_buffer_bytes_left(constMYSQLND_READ_BUFFER*constbuffer)
{
returnbuffer->len;
}
/* }}} */


/* {{{ mysqlnd_read_buffer_free */
staticvoid
mysqlnd_read_buffer_free(MYSQLND_READ_BUFFER**buffer)
{
DBG_ENTER("mysqlnd_read_buffer_free");
if (*buffer) {
mnd_efree((*buffer)->data);
mnd_efree(*buffer);
*buffer=NULL;
 }
DBG_VOID_RETURN;
}
/* }}} */


/* {{{ mysqlnd_create_read_buffer */
PHPAPIMYSQLND_READ_BUFFER*
mysqlnd_create_read_buffer(constsize_tcount)
{
MYSQLND_READ_BUFFER*ret=mnd_emalloc(sizeof(MYSQLND_READ_BUFFER));
DBG_ENTER("mysqlnd_create_read_buffer");
ret->is_empty=mysqlnd_read_buffer_is_empty;
ret->read=mysqlnd_read_buffer_read;
ret->bytes_left=mysqlnd_read_buffer_bytes_left;
ret->free_buffer=mysqlnd_read_buffer_free;
ret->data=mnd_emalloc(count);
ret->size=ret->len=count;
ret->offset=0;
DBG_RETURN(ret);
}
/* }}} */