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/***************************************************************************************************
Zyan Disassembler Library (Zydis)
Original Author : Florian Bernd, Joel Hoener
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
***************************************************************************************************/
#include "config.h"
#if ENABLE(ZYDIS)
#include "ZydisInternalString.h"
#include <wtf/Compiler.h>
WTF_ALLOW_UNSAFE_BUFFER_USAGE_BEGIN
/* ============================================================================================== */
/* Constants */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* Defines */
/* ---------------------------------------------------------------------------------------------- */
#define ZYDIS_MAXCHARS_DEC_32 10
#define ZYDIS_MAXCHARS_DEC_64 20
#define ZYDIS_MAXCHARS_HEX_32 8
#define ZYDIS_MAXCHARS_HEX_64 16
/* ---------------------------------------------------------------------------------------------- */
/* Lookup Tables */
/* ---------------------------------------------------------------------------------------------- */
static const char* const DECIMAL_LOOKUP =
"00010203040506070809"
"10111213141516171819"
"20212223242526272829"
"30313233343536373839"
"40414243444546474849"
"50515253545556575859"
"60616263646566676869"
"70717273747576777879"
"80818283848586878889"
"90919293949596979899";
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
/* Internal Functions */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* Decimal */
/* ---------------------------------------------------------------------------------------------- */
#if defined(ZYAN_X86) || defined(ZYAN_ARM) || defined(ZYAN_EMSCRIPTEN)
ZyanStatus ZydisStringAppendDecU32(ZyanString* string, ZyanU32 value, ZyanU8 padding_length)
{
ZYAN_ASSERT(string);
ZYAN_ASSERT(!string->vector.allocator);
char buffer[ZYDIS_MAXCHARS_DEC_32];
char *buffer_end = &buffer[ZYDIS_MAXCHARS_DEC_32];
char *buffer_write_pointer = buffer_end;
while (value >= 100)
{
const ZyanU32 value_old = value;
buffer_write_pointer -= 2;
value /= 100;
ZYAN_MEMCPY(buffer_write_pointer, &DECIMAL_LOOKUP[(value_old - (value * 100)) * 2], 2);
}
buffer_write_pointer -= 2;
ZYAN_MEMCPY(buffer_write_pointer, &DECIMAL_LOOKUP[value * 2], 2);
const ZyanUSize offset_odd = (ZyanUSize)(value < 10);
const ZyanUSize length_number = buffer_end - buffer_write_pointer - offset_odd;
const ZyanUSize length_total = ZYAN_MAX(length_number, padding_length);
const ZyanUSize length_target = string->vector.size;
if (string->vector.size + length_total > string->vector.capacity)
{
return ZYAN_STATUS_INSUFFICIENT_BUFFER_SIZE;
}
ZyanUSize offset_write = 0;
if (padding_length > length_number)
{
offset_write = padding_length - length_number;
ZYAN_MEMSET((char*)string->vector.data + length_target - 1, '0', offset_write);
}
ZYAN_MEMCPY((char*)string->vector.data + length_target + offset_write - 1,
buffer_write_pointer + offset_odd, length_number);
string->vector.size = length_target + length_total;
ZYDIS_STRING_NULLTERMINATE(string);
return ZYAN_STATUS_SUCCESS;
}
#endif
static ZyanStatus ZydisStringAppendDecU64(ZyanString* string, ZyanU64 value, ZyanU8 padding_length)
{
ZYAN_ASSERT(string);
ZYAN_ASSERT(!string->vector.allocator);
char buffer[ZYDIS_MAXCHARS_DEC_64];
char *buffer_end = &buffer[ZYDIS_MAXCHARS_DEC_64];
char *buffer_write_pointer = buffer_end;
while (value >= 100)
{
const ZyanU64 value_old = value;
buffer_write_pointer -= 2;
value /= 100;
ZYAN_MEMCPY(buffer_write_pointer, &DECIMAL_LOOKUP[(value_old - (value * 100)) * 2], 2);
}
buffer_write_pointer -= 2;
ZYAN_MEMCPY(buffer_write_pointer, &DECIMAL_LOOKUP[value * 2], 2);
const ZyanUSize offset_odd = (ZyanUSize)(value < 10);
const ZyanUSize length_number = buffer_end - buffer_write_pointer - offset_odd;
const ZyanUSize length_total = ZYAN_MAX(length_number, padding_length);
const ZyanUSize length_target = string->vector.size;
if (string->vector.size + length_total > string->vector.capacity)
{
return ZYAN_STATUS_INSUFFICIENT_BUFFER_SIZE;
}
ZyanUSize offset_write = 0;
if (padding_length > length_number)
{
offset_write = padding_length - length_number;
ZYAN_MEMSET((char*)string->vector.data + length_target - 1, '0', offset_write);
}
ZYAN_MEMCPY((char*)string->vector.data + length_target + offset_write - 1,
buffer_write_pointer + offset_odd, length_number);
string->vector.size = length_target + length_total;
ZYDIS_STRING_NULLTERMINATE(string);
return ZYAN_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------------------------- */
/* Hexadecimal */
/* ---------------------------------------------------------------------------------------------- */
#if defined(ZYAN_X86) || defined(ZYAN_ARM) || defined(ZYAN_EMSCRIPTEN)
ZyanStatus ZydisStringAppendHexU32(ZyanString* string, ZyanU32 value, ZyanU8 padding_length,
ZyanBool uppercase)
{
ZYAN_ASSERT(string);
ZYAN_ASSERT(!string->vector.allocator);
const ZyanUSize len = string->vector.size;
const ZyanUSize remaining = string->vector.capacity - string->vector.size;
if (remaining < (ZyanUSize)padding_length)
{
return ZYAN_STATUS_INSUFFICIENT_BUFFER_SIZE;
}
if (!value)
{
const ZyanU8 n = (padding_length ? padding_length : 1);
if (remaining < (ZyanUSize)n)
{
return ZYAN_STATUS_INSUFFICIENT_BUFFER_SIZE;
}
ZYAN_MEMSET((char*)string->vector.data + len - 1, '0', n);
string->vector.size = len + n;
ZYDIS_STRING_NULLTERMINATE(string);
return ZYAN_STATUS_SUCCESS;
}
ZyanU8 n = 0;
char* buffer = ZYAN_NULL;
for (ZyanI8 i = ZYDIS_MAXCHARS_HEX_32 - 1; i >= 0; --i)
{
const ZyanU8 v = (value >> i * 4) & 0x0F;
if (!n)
{
if (!v)
{
continue;
}
if (remaining <= (ZyanU8)i)
{
return ZYAN_STATUS_INSUFFICIENT_BUFFER_SIZE;
}
buffer = (char*)string->vector.data + len - 1;
if (padding_length > i)
{
n = padding_length - i - 1;
ZYAN_MEMSET(buffer, '0', n);
}
}
ZYAN_ASSERT(buffer);
if (uppercase)
{
buffer[n++] = "0123456789ABCDEF"[v];
} else
{
buffer[n++] = "0123456789abcdef"[v];
}
}
string->vector.size = len + n;
ZYDIS_STRING_NULLTERMINATE(string);
return ZYAN_STATUS_SUCCESS;
}
#endif
static ZyanStatus ZydisStringAppendHexU64(ZyanString* string, ZyanU64 value, ZyanU8 padding_length,
ZyanBool uppercase)
{
ZYAN_ASSERT(string);
ZYAN_ASSERT(!string->vector.allocator);
const ZyanUSize len = string->vector.size;
const ZyanUSize remaining = string->vector.capacity - string->vector.size;
if (remaining < (ZyanUSize)padding_length)
{
return ZYAN_STATUS_INSUFFICIENT_BUFFER_SIZE;
}
if (!value)
{
const ZyanU8 n = (padding_length ? padding_length : 1);
if (remaining < (ZyanUSize)n)
{
return ZYAN_STATUS_INSUFFICIENT_BUFFER_SIZE;
}
ZYAN_MEMSET((char*)string->vector.data + len - 1, '0', n);
string->vector.size = len + n;
ZYDIS_STRING_NULLTERMINATE(string);
return ZYAN_STATUS_SUCCESS;
}
ZyanU8 n = 0;
char* buffer = ZYAN_NULL;
for (ZyanI8 i = ((value & 0xFFFFFFFF00000000) ?
ZYDIS_MAXCHARS_HEX_64 : ZYDIS_MAXCHARS_HEX_32) - 1; i >= 0; --i)
{
const ZyanU8 v = (value >> i * 4) & 0x0F;
if (!n)
{
if (!v)
{
continue;
}
if (remaining <= (ZyanU8)i)
{
return ZYAN_STATUS_INSUFFICIENT_BUFFER_SIZE;
}
buffer = (char*)string->vector.data + len - 1;
if (padding_length > i)
{
n = padding_length - i - 1;
ZYAN_MEMSET(buffer, '0', n);
}
}
ZYAN_ASSERT(buffer);
if (uppercase)
{
buffer[n++] = "0123456789ABCDEF"[v];
} else
{
buffer[n++] = "0123456789abcdef"[v];
}
}
string->vector.size = len + n;
ZYDIS_STRING_NULLTERMINATE(string);
return ZYAN_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
/* Public Functions */
/* ============================================================================================== */
/* ---------------------------------------------------------------------------------------------- */
/* Formatting */
/* ---------------------------------------------------------------------------------------------- */
ZyanStatus ZydisStringAppendDecU(ZyanString* string, ZyanU64 value, ZyanU8 padding_length,
const ZyanStringView* prefix, const ZyanStringView* suffix)
{
if (prefix)
{
ZYAN_CHECK(ZydisStringAppend(string, prefix));
}
#if defined(ZYAN_X64) || defined(ZYAN_AARCH64)
ZYAN_CHECK(ZydisStringAppendDecU64(string, value, padding_length));
#else
if (value & 0xFFFFFFFF00000000)
{
ZYAN_CHECK(ZydisStringAppendDecU64(string, value, padding_length));
}
ZYAN_CHECK(ZydisStringAppendDecU32(string, (ZyanU32)value, padding_length));
#endif
if (suffix)
{
return ZydisStringAppend(string, suffix);
}
return ZYAN_STATUS_SUCCESS;
}
ZyanStatus ZydisStringAppendHexU(ZyanString* string, ZyanU64 value, ZyanU8 padding_length,
ZyanBool uppercase, const ZyanStringView* prefix, const ZyanStringView* suffix)
{
if (prefix)
{
ZYAN_CHECK(ZydisStringAppend(string, prefix));
}
#if defined(ZYAN_X64) || defined(ZYAN_AARCH64)
ZYAN_CHECK(ZydisStringAppendHexU64(string, value, padding_length, uppercase));
#else
if (value & 0xFFFFFFFF00000000)
{
ZYAN_CHECK(ZydisStringAppendHexU64(string, value, padding_length, uppercase));
}
else
{
ZYAN_CHECK(ZydisStringAppendHexU32(string, (ZyanU32)value, padding_length, uppercase));
}
#endif
if (suffix)
{
return ZydisStringAppend(string, suffix);
}
return ZYAN_STATUS_SUCCESS;
}
/* ---------------------------------------------------------------------------------------------- */
/* ============================================================================================== */
WTF_ALLOW_UNSAFE_BUFFER_USAGE_END
#endif /* ENABLE(ZYDIS) */
|
