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/********************************************************/
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4256e2 |
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/********************************************************/
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#include <psxtypes/psxtypes.h>
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#include <ntapi/nt_status.h>
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#include <ntapi/nt_unicode.h>
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#include "ntapi_impl.h"
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static int32_t __fastcall __utf16_to_utf8_handler_1byte_or_null_termination(nt_utf16_callback_args * args)
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{
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/* from: 00000000 0xxxxxxx (little endian) */
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uint8_t * dst;
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if (args->dst >= args->dst_cap)
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return NT_STATUS_BUFFER_TOO_SMALL;
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dst = (uint8_t *)args->dst;
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*dst = *(uint8_t *)(args->src);
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/* advance source and destination buffer */
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args->src++;
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args->dst = (void *)((uintptr_t)(args->dst) + 1);
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args->bytes_written++;
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return NT_STATUS_SUCCESS;
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}
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static int32_t __fastcall __utf16_to_utf8_handler_2bytes(nt_utf16_callback_args * args)
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{
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/* from: 00000yyy yyxxxxxx (little endian) */
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const wchar16_t * src;
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uint8_t * dst;
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wchar16_t wx;
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wchar16_t wy;
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if ((uintptr_t)(args->dst) + 1 >= (uintptr_t)(args->dst_cap))
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return NT_STATUS_BUFFER_TOO_SMALL;
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src = args->src;
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dst = (uint8_t *)args->dst;
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wy = *src;
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wy >>= 6;
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wx = *src;
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wx <<= 10;
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wx >>= 10;
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*dst = (char)(0xC0 | wy);
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dst++;
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*dst = (char)(0x80 | wx);
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/* advance source and destination buffer */
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args->src++;
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args->dst = (void *)((uintptr_t)(args->dst) + 2);
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args->bytes_written += 2;
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return NT_STATUS_SUCCESS;
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}
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static int32_t __fastcall __utf16_to_utf8_handler_3bytes(nt_utf16_callback_args * args)
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{
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/* from: zzzzyyyy yyxxxxxx (little endian) */
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const wchar16_t * src;
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uint8_t * dst;
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wchar16_t wx;
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wchar16_t wy;
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wchar16_t wz;
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if ((uintptr_t)(args->dst) + 2 >= (uintptr_t)(args->dst_cap))
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return NT_STATUS_BUFFER_TOO_SMALL;
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src = args->src;
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dst = (uint8_t *)args->dst;
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wz = *src;
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wz >>= 12;
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wy = *src;
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wy <<= 4;
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wy >>= 10;
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wx = *src;
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wx <<= 10;
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wx >>= 10;
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*dst = (char)(0xE0 | wz);
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dst++;
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*dst = (char)(0x80 | wy);
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dst++;
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*dst = (char)(0x80 | wx);
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/* advance source and destination buffer */
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args->src++;
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args->dst = (void *)((uintptr_t)(args->dst) + 3);
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args->bytes_written += 3;
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return NT_STATUS_SUCCESS;
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}
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static int32_t __fastcall __utf16_to_utf8_handler_4bytes(nt_utf16_callback_args * args)
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{
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/* from: 110110ww wwzzzzyy 110111yy yyxxxxxx (little endian) */
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const wchar16_t * src;
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uint8_t * dst;
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wchar16_t wx;
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wchar16_t wz;
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wchar16_t wy_low;
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wchar16_t wy_high;
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wchar16_t ww;
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wchar16_t uuuuu;
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wchar16_t u_low;
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wchar16_t u_high;
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if ((uintptr_t)(args->dst) + 3 >= (uintptr_t)(args->dst_cap))
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return NT_STATUS_BUFFER_TOO_SMALL;
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src = args->src;
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dst = (uint8_t *)args->dst;
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wx = *src;
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wx <<= 10;
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wx >>= 10;
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wy_low = *src;
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wy_low <<= 6;
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wy_low >>= 12;
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src++;
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wy_high = *src;
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wy_high <<= 14;
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wy_high >>= 10;
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wz = *src;
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wz <<= 10;
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wz >>= 12;
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wz <<= 2;
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ww = *src;
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ww <<= 6;
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ww >>= 12;
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uuuuu = ww + 1;
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u_high = uuuuu >> 2;
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u_low = ((uuuuu << 14) >> 10);
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*dst = (char)(0xF0 | u_high);
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dst++;
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*dst = (char)(0x80 | u_low | wz);
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dst++;
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*dst = (char)(0x80 | wy_low | wy_high);
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dst++;
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*dst = (char)(0x80 | wx);
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/* advance source and destination buffer */
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args->src += 2;
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args->dst = (void *)((uintptr_t)(args->dst) + 4);
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args->bytes_written += 4;
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return NT_STATUS_SUCCESS;
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}
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static int32_t __fastcall __update_stream_leftover_info_utf16(
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__in_out nt_unicode_conversion_params_utf16_to_utf8 * params)
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{
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int32_t status;
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ptrdiff_t offset;
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wchar16_t * wlead;
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offset = (uintptr_t)params->src + (uintptr_t)params->src_size_in_bytes - (uintptr_t)params->addr_failed;
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wlead = (wchar16_t *)params->addr_failed;
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if ((offset == 2) && (*wlead >= 0xD800) && (*wlead < 0xDC00)) {
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params->leftover_count = 2;
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params->leftover_bytes = *wlead;
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params->leftover_bytes <<= 16;
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status = NT_STATUS_SUCCESS;
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} else {
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params->leftover_count = 0;
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params->leftover_bytes = 0;
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status = NT_STATUS_ILLEGAL_CHARACTER;
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}
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return status;
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}
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int32_t __stdcall __ntapi_uc_convert_unicode_stream_utf16_to_utf8(
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__in_out nt_unicode_conversion_params_utf16_to_utf8 * params)
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{
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int32_t status;
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nt_utf16_callback_args args;
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ntapi_uc_utf16_callback_fn * callback_fn[5];
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callback_fn[0] = (ntapi_uc_utf16_callback_fn *)__utf16_to_utf8_handler_1byte_or_null_termination;
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callback_fn[1] = (ntapi_uc_utf16_callback_fn *)__utf16_to_utf8_handler_1byte_or_null_termination;
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callback_fn[2] = (ntapi_uc_utf16_callback_fn *)__utf16_to_utf8_handler_2bytes;
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callback_fn[3] = (ntapi_uc_utf16_callback_fn *)__utf16_to_utf8_handler_3bytes;
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callback_fn[4] = (ntapi_uc_utf16_callback_fn *)__utf16_to_utf8_handler_4bytes;
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args.src = params->src;
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args.dst = params->dst;
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args.dst_cap = (void *)((uintptr_t)(params->dst) + (params->dst_size_in_bytes));
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args.bytes_written = params->bytes_written;
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status = __ntapi_uc_validate_unicode_stream_utf16(
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params->src,
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params->src_size_in_bytes,
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¶ms->code_points,
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¶ms->addr_failed,
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callback_fn,
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&args);
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params->bytes_written = args.bytes_written;
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if (status)
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status = __update_stream_leftover_info_utf16(params);
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params->leftover_bytes <<= (8 * (sizeof(uintptr_t) - sizeof(uint32_t)));
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return status;
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}
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dd89bb |
int32_t __stdcall __ntapi_uc_convert_unicode_stream_utf16_to_utf32(
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__in_out nt_unicode_conversion_params_utf16_to_utf32 * params)
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{
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c713d8 |
(void)params;
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return NT_STATUS_SUCCESS;
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dd89bb |
}
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