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dd89bb |
/********************************************************/
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dd89bb |
/* ntapi: Native API core library */
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4256e2 |
/* Copyright (C) 2013--2016 Z. Gilboa */
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dd89bb |
/* Released under GPLv2 and GPLv3; see COPYING.NTAPI. */
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dd89bb |
/********************************************************/
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dd89bb |
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dd89bb |
#include <psxtypes/psxtypes.h>
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dd89bb |
#include <ntapi/nt_status.h>
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dd89bb |
#include <ntapi/nt_unicode.h>
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dd89bb |
#include "ntapi_impl.h"
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dd89bb |
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dd89bb |
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dd89bb |
typedef struct ___two_bytes {
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dd89bb |
unsigned char low;
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dd89bb |
unsigned char high;
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dd89bb |
} __two_bytes;
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dd89bb |
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dd89bb |
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dd89bb |
typedef struct ___three_bytes {
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dd89bb |
unsigned char low;
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dd89bb |
unsigned char middle;
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dd89bb |
unsigned char high;
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dd89bb |
} __three_bytes;
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dd89bb |
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dd89bb |
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dd89bb |
static int32_t __fastcall __utf8_to_utf16_handler_1byte_or_null_termination(nt_utf8_callback_args * args)
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dd89bb |
{
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dd89bb |
/***************************/
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dd89bb |
/* from: 0xxxxxxx */
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dd89bb |
/* to: 00000000 0xxxxxxx */
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dd89bb |
/***************************/
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dd89bb |
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dd89bb |
wchar16_t * dst;
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dd89bb |
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dd89bb |
if (args->dst >= args->dst_cap)
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dd89bb |
return NT_STATUS_BUFFER_TOO_SMALL;
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dd89bb |
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dd89bb |
dst = (wchar16_t *)args->dst;
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dd89bb |
*dst = *(args->src);
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dd89bb |
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dd89bb |
/* advance source and destination buffer */
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dd89bb |
args->src++;
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dd89bb |
args->dst = (void *)((uintptr_t)(args->dst) + sizeof(wchar16_t));
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dd89bb |
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dd89bb |
/* bytes_written */
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dd89bb |
args->bytes_written += sizeof(wchar16_t);
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dd89bb |
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dd89bb |
return NT_STATUS_SUCCESS;
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dd89bb |
}
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dd89bb |
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dd89bb |
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dd89bb |
static int32_t __fastcall __utf8_to_utf16_handler_2bytes(nt_utf8_callback_args * args)
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dd89bb |
{
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dd89bb |
/***************************/
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dd89bb |
/* from: 110yyyyy 10xxxxxx */
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dd89bb |
/* to: 00000yyy yyxxxxxx */
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dd89bb |
/***************************/
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dd89bb |
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dd89bb |
__two_bytes * src; /* big endian */
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dd89bb |
wchar16_t * dst;
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dd89bb |
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dd89bb |
if (args->dst >= args->dst_cap)
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dd89bb |
return NT_STATUS_BUFFER_TOO_SMALL;
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dd89bb |
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dd89bb |
src = (__two_bytes *)args->src;
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dd89bb |
dst = (wchar16_t *)args->dst;
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dd89bb |
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dd89bb |
/* yyyyy */
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dd89bb |
*dst = (src->low ^ 0xC0);
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dd89bb |
*dst <<= 6;
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dd89bb |
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dd89bb |
/* xxxxxx */
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dd89bb |
*dst |= (src->high ^ 0x80);
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dd89bb |
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dd89bb |
/* advance source and destination buffer */
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dd89bb |
args->src += 2;
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dd89bb |
args->dst = (void *)((uintptr_t)(args->dst) + sizeof(wchar16_t));
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dd89bb |
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dd89bb |
/* bytes_written */
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dd89bb |
args->bytes_written += sizeof(wchar16_t);
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dd89bb |
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dd89bb |
return NT_STATUS_SUCCESS;
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dd89bb |
}
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dd89bb |
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dd89bb |
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dd89bb |
static int32_t __fastcall __utf8_to_utf16_handler_3bytes(nt_utf8_callback_args * args)
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dd89bb |
{
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dd89bb |
/************************************/
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dd89bb |
/* from: 1110zzzz 10yyyyyy 10xxxxxx */
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dd89bb |
/* to: zzzzyyyy yyxxxxxx */
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dd89bb |
/************************************/
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dd89bb |
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dd89bb |
__three_bytes * src; /* big endian */
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dd89bb |
wchar16_t * dst;
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dd89bb |
wchar16_t yyyyy;
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dd89bb |
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dd89bb |
if (args->dst >= args->dst_cap)
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dd89bb |
return NT_STATUS_BUFFER_TOO_SMALL;
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dd89bb |
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dd89bb |
src = (__three_bytes *)args->src;
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dd89bb |
dst = (wchar16_t *)args->dst;
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dd89bb |
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dd89bb |
/* zzzz */
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dd89bb |
*dst = (src->low ^ 0xE0);
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dd89bb |
*dst <<= 12;
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dd89bb |
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dd89bb |
/* yyyyy */
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dd89bb |
yyyyy = (src->middle ^ 0x80);
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dd89bb |
yyyyy <<= 6;
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dd89bb |
*dst |= yyyyy;
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dd89bb |
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dd89bb |
/* xxxxxx */
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dd89bb |
*dst |= (src->high ^ 0x80);
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dd89bb |
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dd89bb |
/* advance source and destination buffer */
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dd89bb |
args->src += 3;
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dd89bb |
args->dst = (void *)((uintptr_t)(args->dst) + sizeof(wchar16_t));
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dd89bb |
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dd89bb |
/* bytes_written */
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dd89bb |
args->bytes_written += sizeof(wchar16_t);
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dd89bb |
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dd89bb |
return NT_STATUS_SUCCESS;
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dd89bb |
}
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dd89bb |
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dd89bb |
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dd89bb |
static int32_t __fastcall __utf8_to_utf16_handler_4bytes(nt_utf8_callback_args * args)
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dd89bb |
{
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dd89bb |
/*************************************************/
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dd89bb |
/* from: 11110uuu 10uuzzzz 10yyyyyy 10xxxxxx */
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dd89bb |
/* to: 110110ww wwzzzzyy 110111yy yyxxxxxx */
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dd89bb |
/*************************************************/
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dd89bb |
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dd89bb |
__two_bytes * src_low; /* big endian */
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dd89bb |
__two_bytes * src_high; /* big endian */
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dd89bb |
wchar16_t * dst_lead;
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dd89bb |
wchar16_t * dst_trail;
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dd89bb |
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dd89bb |
wchar16_t u;
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dd89bb |
unsigned char ulow;
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dd89bb |
unsigned char uhigh;
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dd89bb |
unsigned char yyyy;
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dd89bb |
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dd89bb |
dst_lead = dst_trail = (wchar16_t *)args->dst;
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dd89bb |
dst_trail++;
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dd89bb |
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dd89bb |
if ((uintptr_t)dst_trail >= (uintptr_t)args->dst_cap)
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dd89bb |
return NT_STATUS_BUFFER_TOO_SMALL;
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dd89bb |
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dd89bb |
src_low = src_high = (__two_bytes *)args->src;
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dd89bb |
src_high++;
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dd89bb |
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dd89bb |
/* u */
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dd89bb |
ulow = src_low->low ^ 0xF0;
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dd89bb |
uhigh = src_low->high ^ 0x80;
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dd89bb |
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dd89bb |
ulow <<= 2;
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dd89bb |
uhigh >>= 4;
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dd89bb |
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dd89bb |
u = ulow | uhigh;
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dd89bb |
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dd89bb |
/* 110110ww wwzzzzyy */
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dd89bb |
*dst_lead = 0xD800;
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dd89bb |
*dst_lead |= ((u-1) << 6);
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dd89bb |
*dst_lead |= ((src_low->high ^ 0x80) << 2);
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dd89bb |
*dst_lead |= ((src_high->low ^ 0x80) >> 4);
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dd89bb |
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dd89bb |
/* 110111yy yyxxxxxx */
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dd89bb |
yyyy = (src_high->low << 4);
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dd89bb |
*dst_trail = yyyy;
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dd89bb |
*dst_trail <<= 2;
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dd89bb |
*dst_trail |= (src_high->high ^ 0x80);
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dd89bb |
*dst_trail |= 0xDC00;
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dd89bb |
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dd89bb |
/* advance source and destination buffer */
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dd89bb |
args->src += 4;
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dd89bb |
args->dst = (void *)((uintptr_t)(args->dst) + (2 * sizeof(wchar16_t)));
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dd89bb |
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dd89bb |
/* bytes_written */
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dd89bb |
args->bytes_written += 2 * sizeof(wchar16_t);
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dd89bb |
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dd89bb |
return NT_STATUS_SUCCESS;
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dd89bb |
}
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dd89bb |
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dd89bb |
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dd89bb |
static int32_t __fastcall __update_stream_leftover_info_utf8(
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dd89bb |
__in_out nt_unicode_conversion_params_utf8_to_utf16 * params)
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dd89bb |
{
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dd89bb |
int32_t status;
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dd89bb |
ptrdiff_t offset;
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dd89bb |
unsigned char * utf8;
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dd89bb |
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dd89bb |
offset = (uintptr_t)params->src + (uintptr_t)params->src_size_in_bytes - (uintptr_t)params->addr_failed;
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dd89bb |
utf8 = (unsigned char *)params->addr_failed;
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dd89bb |
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dd89bb |
/* default status */
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dd89bb |
status = NT_STATUS_ILLEGAL_CHARACTER;
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dd89bb |
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dd89bb |
if (offset == 1) {
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dd89bb |
if ((utf8[0] >= 0xC2) && (utf8[0] <= 0xF4)) {
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dd89bb |
/* one leftover byte */
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dd89bb |
params->leftover_count = 1;
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dd89bb |
params->leftover_bytes = utf8[0];
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dd89bb |
params->leftover_bytes <<= 24;
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dd89bb |
status = NT_STATUS_SUCCESS;
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dd89bb |
}
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dd89bb |
} else if (offset == 2) {
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dd89bb |
if /* ------- */ (((utf8[0] == 0xE0) && (utf8[1] >= 0xA0) && (utf8[1] <= 0xBF))
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dd89bb |
|| ((utf8[0] >= 0xE1) && (utf8[0] <= 0xEC) && (utf8[1] >= 0x80) && (utf8[1] <= 0xBF))
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dd89bb |
|| ((utf8[0] == 0xED) && (utf8[1] >= 0x80) && (utf8[1] <= 0x9F))
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dd89bb |
|| ((utf8[0] >= 0xEE) && (utf8[0] <= 0xEF) && (utf8[1] >= 0x80) && (utf8[1] <= 0xBF))
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dd89bb |
|| ((utf8[0] == 0xF0) && (utf8[1] >= 0x90) && (utf8[1] <= 0xBF))
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dd89bb |
|| ((utf8[0] >= 0xF1) && (utf8[0] <= 0xF3) && (utf8[1] >= 0x80) && (utf8[1] <= 0xBF))
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dd89bb |
|| ((utf8[0] == 0xF4) && (utf8[1] >= 0x80) && (utf8[1] <= 0x8F))) {
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dd89bb |
/* two leftover bytes */
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dd89bb |
params->leftover_count = 2;
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dd89bb |
params->leftover_bytes = utf8[0];
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dd89bb |
params->leftover_bytes <<= 8;
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dd89bb |
params->leftover_bytes += utf8[1];
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dd89bb |
params->leftover_bytes <<= 16;
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dd89bb |
status = NT_STATUS_SUCCESS;
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dd89bb |
}
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dd89bb |
} else if (offset == 3) {
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dd89bb |
if /* ------- */ (((utf8[0] == 0xF0) && (utf8[1] >= 0x90) && (utf8[1] <= 0xBF))
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dd89bb |
|| ((utf8[0] >= 0xF1) && (utf8[0] <= 0xF3) && (utf8[1] >= 0x80) && (utf8[1] <= 0xBF))
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dd89bb |
|| ((utf8[0] == 0xF4) && (utf8[1] >= 0x80) && (utf8[1] <= 0x8F))) {
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dd89bb |
/* three leftover bytes */
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dd89bb |
params->leftover_count = 3;
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dd89bb |
params->leftover_bytes = utf8[0];
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dd89bb |
params->leftover_bytes <<= 8;
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dd89bb |
params->leftover_bytes += utf8[1];
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dd89bb |
params->leftover_bytes <<= 8;
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dd89bb |
params->leftover_bytes += utf8[2];
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dd89bb |
params->leftover_bytes <<= 8;
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dd89bb |
status = NT_STATUS_SUCCESS;
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dd89bb |
}
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dd89bb |
}
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dd89bb |
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dd89bb |
if (status != NT_STATUS_SUCCESS) {
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dd89bb |
params->leftover_count = 0;
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dd89bb |
params->leftover_bytes = 0;
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dd89bb |
}
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dd89bb |
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dd89bb |
return status;
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dd89bb |
}
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dd89bb |
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dd89bb |
int32_t __stdcall __ntapi_uc_convert_unicode_stream_utf8_to_utf16(
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dd89bb |
__in_out nt_unicode_conversion_params_utf8_to_utf16 * params)
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dd89bb |
{
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dd89bb |
int32_t status;
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dd89bb |
nt_utf8_callback_args args;
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dd89bb |
ntapi_uc_utf8_callback_fn * callback_fn[5];
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dd89bb |
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dd89bb |
callback_fn[0] = (ntapi_uc_utf8_callback_fn *)__utf8_to_utf16_handler_1byte_or_null_termination;
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dd89bb |
callback_fn[1] = (ntapi_uc_utf8_callback_fn *)__utf8_to_utf16_handler_1byte_or_null_termination;
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dd89bb |
callback_fn[2] = (ntapi_uc_utf8_callback_fn *)__utf8_to_utf16_handler_2bytes;
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dd89bb |
callback_fn[3] = (ntapi_uc_utf8_callback_fn *)__utf8_to_utf16_handler_3bytes;
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dd89bb |
callback_fn[4] = (ntapi_uc_utf8_callback_fn *)__utf8_to_utf16_handler_4bytes;
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dd89bb |
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dd89bb |
args.src = params->src;
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dd89bb |
args.dst = params->dst;
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dd89bb |
args.dst_cap = (void *)((uintptr_t)(params->dst) + (params->dst_size_in_bytes));
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dd89bb |
args.bytes_written = params->bytes_written;
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dd89bb |
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dd89bb |
status = __ntapi_uc_validate_unicode_stream_utf8(
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dd89bb |
params->src,
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dd89bb |
params->src_size_in_bytes,
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dd89bb |
¶ms->code_points,
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dd89bb |
¶ms->addr_failed,
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dd89bb |
callback_fn,
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dd89bb |
&args);
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dd89bb |
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dd89bb |
params->bytes_written = args.bytes_written;
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dd89bb |
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56548d |
switch (status) {
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56548d |
case NT_STATUS_SUCCESS:
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56548d |
case NT_STATUS_BUFFER_TOO_SMALL:
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56548d |
return status;
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56548d |
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56548d |
default:
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56548d |
status = __update_stream_leftover_info_utf8(params);
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56548d |
}
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dd89bb |
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dd89bb |
/* (optimized out on 32-bit architectures) */
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dd89bb |
params->leftover_bytes <<= (8 * (sizeof(uintptr_t) - sizeof(uint32_t)));
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dd89bb |
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dd89bb |
return status;
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dd89bb |
}
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dd89bb |
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dd89bb |
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dd89bb |
int32_t __stdcall __ntapi_uc_convert_unicode_stream_utf8_to_utf32(
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dd89bb |
__in_out nt_unicode_conversion_params_utf8_to_utf32 * params)
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dd89bb |
{
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|
c713d8 |
(void)params;
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dd89bb |
return NT_STATUS_SUCCESS;
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|
dd89bb |
}
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