14e2277962
while others dislike them being extra commits, let's clean them up once and for all for the existing code. If it's ugly, let it only be ugly once :-) Signed-off-by: Stefan Reinauer <stepan@coresystems.de> Acked-by: Stefan Reinauer <stepan@coresystems.de> git-svn-id: svn://svn.coreboot.org/coreboot/trunk@5507 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
87 lines
2 KiB
C
87 lines
2 KiB
C
#include <libpayload.h>
|
|
|
|
// This GETBIT is supposed to work on little endian
|
|
// 32bit systems. The algorithm will definitely need
|
|
// some fixing on other systems, but it might not be
|
|
// a problem since the nrv2b binary behaves the same..
|
|
|
|
#ifndef ENDIAN
|
|
#define ENDIAN 0
|
|
#endif
|
|
#ifndef BITSIZE
|
|
#define BITSIZE 32
|
|
#endif
|
|
|
|
#define GETBIT_8(bb, src, ilen) \
|
|
(((bb = bb & 0x7f ? bb*2 : ((unsigned)src[ilen++]*2+1)) >> 8) & 1)
|
|
|
|
#define GETBIT_LE16(bb, src, ilen) \
|
|
(bb*=2,bb&0xffff ? (bb>>16)&1 : (ilen+=2,((bb=(src[ilen-2]+src[ilen-1]*256u)*2+1)>>16)&1))
|
|
#define GETBIT_LE32(bb, src, ilen) \
|
|
(bc > 0 ? ((bb>>--bc)&1) : (bc=31,\
|
|
bb=*(const u32 *)((src)+ilen),ilen+=4,(bb>>31)&1))
|
|
|
|
#if ENDIAN == 0 && BITSIZE == 8
|
|
#define GETBIT(bb, src, ilen) GETBIT_8(bb, src, ilen)
|
|
#endif
|
|
#if ENDIAN == 0 && BITSIZE == 16
|
|
#define GETBIT(bb, src, ilen) GETBIT_LE16(bb, src, ilen)
|
|
#endif
|
|
#if ENDIAN == 0 && BITSIZE == 32
|
|
#define GETBIT(bb, src, ilen) GETBIT_LE32(bb, src, ilen)
|
|
#endif
|
|
|
|
unsigned long unrv2b(u8 *src, u8 *dst, unsigned long *ilen_p)
|
|
{
|
|
unsigned long ilen = 0, olen = 0, last_m_off = 1;
|
|
u32 bb = 0;
|
|
unsigned bc = 0;
|
|
const u8 *m_pos;
|
|
|
|
// skip length
|
|
src += 4;
|
|
/* FIXME: check olen with the length stored in first 4 bytes */
|
|
|
|
for (;;) {
|
|
unsigned int m_off, m_len;
|
|
while (GETBIT(bb, src, ilen)) {
|
|
dst[olen++] = src[ilen++];
|
|
}
|
|
|
|
m_off = 1;
|
|
do {
|
|
m_off = m_off * 2 + GETBIT(bb, src, ilen);
|
|
} while (!GETBIT(bb, src, ilen));
|
|
if (m_off == 2) {
|
|
m_off = last_m_off;
|
|
} else {
|
|
m_off = (m_off - 3) * 256 + src[ilen++];
|
|
if (m_off == 0xffffffffU)
|
|
break;
|
|
last_m_off = ++m_off;
|
|
}
|
|
|
|
m_len = GETBIT(bb, src, ilen);
|
|
m_len = m_len * 2 + GETBIT(bb, src, ilen);
|
|
if (m_len == 0) {
|
|
m_len++;
|
|
do {
|
|
m_len = m_len * 2 + GETBIT(bb, src, ilen);
|
|
} while (!GETBIT(bb, src, ilen));
|
|
m_len += 2;
|
|
}
|
|
m_len += (m_off > 0xd00);
|
|
|
|
m_pos = dst + olen - m_off;
|
|
dst[olen++] = *m_pos++;
|
|
do {
|
|
dst[olen++] = *m_pos++;
|
|
} while (--m_len > 0);
|
|
}
|
|
|
|
*ilen_p = ilen;
|
|
|
|
return olen;
|
|
|
|
}
|
|
|