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/* lzo_init.c -- initialization of the LZO library
This file is part of the LZO real-time data compression library.
Copyright (C) 1996-2014 Markus Franz Xaver Johannes Oberhumer
All Rights Reserved.
The LZO library 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 2 of
the License, or (at your option) any later version.
The LZO library 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 the LZO library; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Markus F.X.J. Oberhumer
<markus@oberhumer.com>
http://www.oberhumer.com/opensource/lzo/
*/
#include "lzo_conf.h"
/***********************************************************************
// Runtime check of the assumptions about the size of builtin types,
// memory model, byte order and other low-level constructs.
//
// We are really paranoid here - LZO should either fail
// at startup or not at all.
//
// Because of inlining much of these functions evaluates to nothing.
//
// And while many of the tests seem highly obvious and redundant they are
// here to catch compiler/optimizer bugs. Yes, these do exist.
************************************************************************/
#if !defined(__LZO_IN_MINILZO)
#define LZO_WANT_ACC_CHK_CH 1
#undef LZOCHK_ASSERT
#include "lzo_supp.h"
LZOCHK_ASSERT((LZO_UINT32_C(1) << (int)(8*sizeof(LZO_UINT32_C(1))-1)) > 0)
LZOCHK_ASSERT_IS_SIGNED_T(lzo_int)
LZOCHK_ASSERT_IS_UNSIGNED_T(lzo_uint)
#if !(__LZO_UINTPTR_T_IS_POINTER)
LZOCHK_ASSERT_IS_UNSIGNED_T(lzo_uintptr_t)
#endif
LZOCHK_ASSERT(sizeof(lzo_uintptr_t) >= sizeof(lzo_voidp))
LZOCHK_ASSERT_IS_UNSIGNED_T(lzo_xint)
#endif
#undef LZOCHK_ASSERT
/***********************************************************************
//
************************************************************************/
union lzo_config_check_union {
lzo_uint a[2];
unsigned char b[2*LZO_MAX(8,sizeof(lzo_uint))];
#if defined(lzo_uint64_t)
lzo_uint64_t c[2];
#endif
};
#if 0
#define u2p(ptr,off) ((lzo_voidp) (((lzo_bytep)(lzo_voidp)(ptr)) + (off)))
#else
static __lzo_noinline lzo_voidp u2p(lzo_voidp ptr, lzo_uint off)
{
return (lzo_voidp) ((lzo_bytep) ptr + off);
}
#endif
LZO_PUBLIC(int)
_lzo_config_check(void)
{
#if (LZO_CC_CLANG && (LZO_CC_CLANG >= 0x030100ul && LZO_CC_CLANG < 0x030300ul))
# if 0
/* work around a clang 3.1 and clang 3.2 compiler bug; clang 3.3 and 3.4 work */
volatile
# endif
#endif
union lzo_config_check_union u;
lzo_voidp p;
unsigned r = 1;
u.a[0] = u.a[1] = 0;
p = u2p(&u, 0);
r &= ((* (lzo_bytep) p) == 0);
#if !(LZO_CFG_NO_CONFIG_CHECK)
#if (LZO_ABI_BIG_ENDIAN)
u.a[0] = u.a[1] = 0; u.b[sizeof(lzo_uint) - 1] = 128;
p = u2p(&u, 0);
r &= ((* (lzo_uintp) p) == 128);
#endif
#if (LZO_ABI_LITTLE_ENDIAN)
u.a[0] = u.a[1] = 0; u.b[0] = 128;
p = u2p(&u, 0);
r &= ((* (lzo_uintp) p) == 128);
#endif
u.a[0] = u.a[1] = 0;
u.b[0] = 1; u.b[3] = 2;
p = u2p(&u, 1);
r &= UA_GET_NE16(p) == 0;
r &= UA_GET_LE16(p) == 0;
u.b[1] = 128;
r &= UA_GET_LE16(p) == 128;
u.a[0] = u.a[1] = 0;
u.b[0] = 3; u.b[5] = 4;
p = u2p(&u, 1);
r &= UA_GET_NE32(p) == 0;
r &= UA_GET_LE32(p) == 0;
u.b[1] = 128;
r &= UA_GET_LE32(p) == 128;
#if defined(UA_GET_NE64)
u.c[0] = u.c[1] = 0;
u.b[0] = 5; u.b[9] = 6;
p = u2p(&u, 1);
u.c[0] = u.c[1] = 0;
r &= UA_GET_NE64(p) == 0;
#if defined(UA_GET_LE64)
r &= UA_GET_LE64(p) == 0;
u.b[1] = 128;
r &= UA_GET_LE64(p) == 128;
#endif
#endif
#if defined(lzo_bitops_ctlz32)
{ unsigned i = 0; lzo_uint32_t v;
for (v = 1; v != 0 && r == 1; v <<= 1, i++) {
r &= lzo_bitops_ctlz32(v) == 31 - i;
r &= lzo_bitops_ctlz32_func(v) == 31 - i;
}}
#endif
#if defined(lzo_bitops_ctlz64)
{ unsigned i = 0; lzo_uint64_t v;
for (v = 1; v != 0 && r == 1; v <<= 1, i++) {
r &= lzo_bitops_ctlz64(v) == 63 - i;
r &= lzo_bitops_ctlz64_func(v) == 63 - i;
}}
#endif
#if defined(lzo_bitops_cttz32)
{ unsigned i = 0; lzo_uint32_t v;
for (v = 1; v != 0 && r == 1; v <<= 1, i++) {
r &= lzo_bitops_cttz32(v) == i;
r &= lzo_bitops_cttz32_func(v) == i;
}}
#endif
#if defined(lzo_bitops_cttz64)
{ unsigned i = 0; lzo_uint64_t v;
for (v = 1; v != 0 && r == 1; v <<= 1, i++) {
r &= lzo_bitops_cttz64(v) == i;
r &= lzo_bitops_cttz64_func(v) == i;
}}
#endif
#endif
LZO_UNUSED_FUNC(lzo_bitops_unused_funcs);
return r == 1 ? LZO_E_OK : LZO_E_ERROR;
}
/***********************************************************************
//
************************************************************************/
LZO_PUBLIC(int)
__lzo_init_v2(unsigned v, int s1, int s2, int s3, int s4, int s5,
int s6, int s7, int s8, int s9)
{
int r;
#if defined(__LZO_IN_MINILZO)
#elif (LZO_CC_MSC && ((_MSC_VER) < 700))
#else
#define LZO_WANT_ACC_CHK_CH 1
#undef LZOCHK_ASSERT
#define LZOCHK_ASSERT(expr) LZO_COMPILE_TIME_ASSERT(expr)
#include "lzo_supp.h"
#endif
#undef LZOCHK_ASSERT
if (v == 0)
return LZO_E_ERROR;
r = (s1 == -1 || s1 == (int) sizeof(short)) &&
(s2 == -1 || s2 == (int) sizeof(int)) &&
(s3 == -1 || s3 == (int) sizeof(long)) &&
(s4 == -1 || s4 == (int) sizeof(lzo_uint32_t)) &&
(s5 == -1 || s5 == (int) sizeof(lzo_uint)) &&
(s6 == -1 || s6 == (int) lzo_sizeof_dict_t) &&
(s7 == -1 || s7 == (int) sizeof(char *)) &&
(s8 == -1 || s8 == (int) sizeof(lzo_voidp)) &&
(s9 == -1 || s9 == (int) sizeof(lzo_callback_t));
if (!r)
return LZO_E_ERROR;
r = _lzo_config_check();
if (r != LZO_E_OK)
return r;
return r;
}
#if !defined(__LZO_IN_MINILZO)
#include "lzo_dll.ch"
#endif
/*
vi:ts=4:et
*/
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