/**
* @attention 本注释得到了"核高基"科技重大专项2012年课题“开源操作系统内核分析和安全性评估
*（课题编号：2012ZX01039-004）”的资助。
*
* @copyright 注释添加单位：清华大学——03任务（Linux内核相关通用基础软件包分析）承担单位
*
* @author 注释添加人员：谢文学
*
* @date 注释添加日期：2013年5月10日
*
* @note 注释详细内容:
*
* 本函数实现gunzip的解压缩数据块的功能。
*/
static void
get_new_block (void)
{
register ulg b; /* bit buffer */
register unsigned k; /* number of bits in bit buffer */
hufts = 0;
/* make local bit buffer */
b = bb;
k = bk;
/* read in last block bit */
NEEDBITS (1);
last_block = (int) b & 1;
DUMPBITS (1);
/* read in block type */
NEEDBITS (2);
block_type = (unsigned) b & 3;
DUMPBITS (2);
/* restore the global bit buffer */
bb = b;
bk = k;
if (block_type == INFLATE_STORED)
init_stored_block ();
if (block_type == INFLATE_FIXED)
init_fixed_block ();
if (block_type == INFLATE_DYNAMIC)
init_dynamic_block ();
}
static void
get_new_block (grub_file_t file)
{
register ulg b; /* bit buffer */
register unsigned k; /* number of bits in bit buffer */
grub_gzio_t gzio = file->data;
/* make local bit buffer */
b = gzio->bb;
k = gzio->bk;
/* read in last block bit */
NEEDBITS (1);
gzio->last_block = (int) b & 1;
DUMPBITS (1);
/* read in block type */
NEEDBITS (2);
gzio->block_type = (unsigned) b & 3;
DUMPBITS (2);
/* restore the global bit buffer */
gzio->bb = b;
gzio->bk = k;
switch (gzio->block_type)
{
case INFLATE_STORED:
init_stored_block (file);
break;
case INFLATE_FIXED:
init_fixed_block (file);
break;
case INFLATE_DYNAMIC:
init_dynamic_block (file);
break;
default:
break;
}
}
