+++ /dev/null
-/*
- * PROJECT: ReactOS Kernel - Vista+ APIs
- * LICENSE: GPL v2 - See COPYING in the top level directory
- * FILE: lib/drivers/ntoskrnl_vista/rtl.c
- * PURPOSE: Rtl functions of Vista+
- * PROGRAMMERS: Thomas Faber <thomas.faber@reactos.org>
- */
-
-#include <ntdef.h>
-#include <ntifs.h>
-
-typedef UCHAR BYTE;
-
-/******************************************************************************
- * RtlUnicodeToUTF8N [NTDLL.@]
- */
-NTSTATUS NTAPI RtlUnicodeToUTF8N(CHAR *utf8_dest, ULONG utf8_bytes_max,
- ULONG *utf8_bytes_written,
- const WCHAR *uni_src, ULONG uni_bytes)
-{
- NTSTATUS status;
- ULONG i;
- ULONG written;
- ULONG ch;
- BYTE utf8_ch[4];
- ULONG utf8_ch_len;
-
- if (!uni_src)
- return STATUS_INVALID_PARAMETER_4;
- if (!utf8_bytes_written)
- return STATUS_INVALID_PARAMETER;
- if (utf8_dest && uni_bytes % sizeof(WCHAR))
- return STATUS_INVALID_PARAMETER_5;
-
- written = 0;
- status = STATUS_SUCCESS;
-
- for (i = 0; i < uni_bytes / sizeof(WCHAR); i++)
- {
- /* decode UTF-16 into ch */
- ch = uni_src[i];
- if (ch >= 0xdc00 && ch <= 0xdfff)
- {
- ch = 0xfffd;
- status = STATUS_SOME_NOT_MAPPED;
- }
- else if (ch >= 0xd800 && ch <= 0xdbff)
- {
- if (i + 1 < uni_bytes / sizeof(WCHAR))
- {
- ch -= 0xd800;
- ch <<= 10;
- if (uni_src[i + 1] >= 0xdc00 && uni_src[i + 1] <= 0xdfff)
- {
- ch |= uni_src[i + 1] - 0xdc00;
- ch += 0x010000;
- i++;
- }
- else
- {
- ch = 0xfffd;
- status = STATUS_SOME_NOT_MAPPED;
- }
- }
- else
- {
- ch = 0xfffd;
- status = STATUS_SOME_NOT_MAPPED;
- }
- }
-
- /* encode ch as UTF-8 */
- ASSERT(ch <= 0x10ffff);
- if (ch < 0x80)
- {
- utf8_ch[0] = ch & 0x7f;
- utf8_ch_len = 1;
- }
- else if (ch < 0x800)
- {
- utf8_ch[0] = 0xc0 | (ch >> 6 & 0x1f);
- utf8_ch[1] = 0x80 | (ch >> 0 & 0x3f);
- utf8_ch_len = 2;
- }
- else if (ch < 0x10000)
- {
- utf8_ch[0] = 0xe0 | (ch >> 12 & 0x0f);
- utf8_ch[1] = 0x80 | (ch >> 6 & 0x3f);
- utf8_ch[2] = 0x80 | (ch >> 0 & 0x3f);
- utf8_ch_len = 3;
- }
- else if (ch < 0x200000)
- {
- utf8_ch[0] = 0xf0 | (ch >> 18 & 0x07);
- utf8_ch[1] = 0x80 | (ch >> 12 & 0x3f);
- utf8_ch[2] = 0x80 | (ch >> 6 & 0x3f);
- utf8_ch[3] = 0x80 | (ch >> 0 & 0x3f);
- utf8_ch_len = 4;
- }
-
- if (!utf8_dest)
- {
- written += utf8_ch_len;
- continue;
- }
-
- if (utf8_bytes_max >= utf8_ch_len)
- {
- memcpy(utf8_dest, utf8_ch, utf8_ch_len);
- utf8_dest += utf8_ch_len;
- utf8_bytes_max -= utf8_ch_len;
- written += utf8_ch_len;
- }
- else
- {
- utf8_bytes_max = 0;
- status = STATUS_BUFFER_TOO_SMALL;
- }
- }
-
- *utf8_bytes_written = written;
- return status;
-}
-
-
-/******************************************************************************
- * RtlUTF8ToUnicodeN [NTDLL.@]
- */
-NTSTATUS NTAPI RtlUTF8ToUnicodeN(WCHAR *uni_dest, ULONG uni_bytes_max,
- ULONG *uni_bytes_written,
- const CHAR *utf8_src, ULONG utf8_bytes)
-{
- NTSTATUS status;
- ULONG i, j;
- ULONG written;
- ULONG ch;
- ULONG utf8_trail_bytes;
- WCHAR utf16_ch[3];
- ULONG utf16_ch_len;
-
- if (!utf8_src)
- return STATUS_INVALID_PARAMETER_4;
- if (!uni_bytes_written)
- return STATUS_INVALID_PARAMETER;
-
- written = 0;
- status = STATUS_SUCCESS;
-
- for (i = 0; i < utf8_bytes; i++)
- {
- /* read UTF-8 lead byte */
- ch = (BYTE)utf8_src[i];
- utf8_trail_bytes = 0;
- if (ch >= 0xf5)
- {
- ch = 0xfffd;
- status = STATUS_SOME_NOT_MAPPED;
- }
- else if (ch >= 0xf0)
- {
- ch &= 0x07;
- utf8_trail_bytes = 3;
- }
- else if (ch >= 0xe0)
- {
- ch &= 0x0f;
- utf8_trail_bytes = 2;
- }
- else if (ch >= 0xc2)
- {
- ch &= 0x1f;
- utf8_trail_bytes = 1;
- }
- else if (ch >= 0x80)
- {
- /* overlong or trail byte */
- ch = 0xfffd;
- status = STATUS_SOME_NOT_MAPPED;
- }
-
- /* read UTF-8 trail bytes */
- if (i + utf8_trail_bytes < utf8_bytes)
- {
- for (j = 0; j < utf8_trail_bytes; j++)
- {
- if ((utf8_src[i + 1] & 0xc0) == 0x80)
- {
- ch <<= 6;
- ch |= utf8_src[i + 1] & 0x3f;
- i++;
- }
- else
- {
- ch = 0xfffd;
- utf8_trail_bytes = 0;
- status = STATUS_SOME_NOT_MAPPED;
- break;
- }
- }
- }
- else
- {
- ch = 0xfffd;
- utf8_trail_bytes = 0;
- status = STATUS_SOME_NOT_MAPPED;
- i = utf8_bytes;
- }
-
- /* encode ch as UTF-16 */
- if ((ch > 0x10ffff) ||
- (ch >= 0xd800 && ch <= 0xdfff) ||
- (utf8_trail_bytes == 2 && ch < 0x00800) ||
- (utf8_trail_bytes == 3 && ch < 0x10000))
- {
- /* invalid codepoint or overlong encoding */
- utf16_ch[0] = 0xfffd;
- utf16_ch[1] = 0xfffd;
- utf16_ch[2] = 0xfffd;
- utf16_ch_len = utf8_trail_bytes;
- status = STATUS_SOME_NOT_MAPPED;
- }
- else if (ch >= 0x10000)
- {
- /* surrogate pair */
- ch -= 0x010000;
- utf16_ch[0] = 0xd800 + (ch >> 10 & 0x3ff);
- utf16_ch[1] = 0xdc00 + (ch >> 0 & 0x3ff);
- utf16_ch_len = 2;
- }
- else
- {
- /* single unit */
- utf16_ch[0] = ch;
- utf16_ch_len = 1;
- }
-
- if (!uni_dest)
- {
- written += utf16_ch_len;
- continue;
- }
-
- for (j = 0; j < utf16_ch_len; j++)
- {
- if (uni_bytes_max >= sizeof(WCHAR))
- {
- *uni_dest++ = utf16_ch[j];
- uni_bytes_max -= sizeof(WCHAR);
- written++;
- }
- else
- {
- uni_bytes_max = 0;
- status = STATUS_BUFFER_TOO_SMALL;
- }
- }
- }
-
- *uni_bytes_written = written * sizeof(WCHAR);
- return status;
-}
projects / reactos.git / blobdiff