nls.c File Reference

#include "precomp.h"

Include dependency graph for nls.c:

Go to the source code of this file.

Functions
static VOID	NLS_InitCodePageTable (PUSHORT TableBase, PCPTABLEINFO CodePageTable)
PUSHORT	NLS_ReadFile (const WCHAR *pszFile, PCPTABLEINFO CodePageTable)
BOOL	NLS_IsDBCSCodePage (PCPTABLEINFO CodePageTable)
BOOL	NLS_IsGlyphTablePresent (PCPTABLEINFO CodePageTable)
BOOL	NLS_IsDefaultCharForMB (PCPTABLEINFO CodePageTable, UCHAR Char)
BOOL	NLS_IsDefaultCharForUnicode (PCPTABLEINFO CodePageTable, USHORT Char)
USHORT	NLS_RecordsCountForMBTable (PCPTABLEINFO CodePageTable)
USHORT	NLS_RecordsCountForUnicodeTable (PCPTABLEINFO CodePageTable)
USHORT	NLS_RecordsCountForGlyphTable (PCPTABLEINFO CodePageTable)
USHORT	NLS_RecordsCountForDBCSTable (PCPTABLEINFO CodePageTable, UCHAR LeadByte)

Function Documentation

NLS_InitCodePageTable()

static VOID NLS_InitCodePageTable ( PUSHORT  TableBase, PCPTABLEINFO  CodePageTable  )

static

Definition at line 11 of file nls.c.

{
    PNLS_FILE_HEADER NlsFileHeader;
 
    NlsFileHeader = (PNLS_FILE_HEADER)TableBase;
 
    /* Copy header fields first */
    CodePageTable->CodePage = NlsFileHeader->CodePage;
    CodePageTable->MaximumCharacterSize = NlsFileHeader->MaximumCharacterSize;
    CodePageTable->DefaultChar = NlsFileHeader->DefaultChar;
    CodePageTable->UniDefaultChar = NlsFileHeader->UniDefaultChar;
    CodePageTable->TransDefaultChar = NlsFileHeader->TransDefaultChar;
    CodePageTable->TransUniDefaultChar = NlsFileHeader->TransUniDefaultChar;
 
    CopyMemory(&CodePageTable->LeadByte, &NlsFileHeader->LeadByte, MAXIMUM_LEADBYTES);
 
    /* Offset to wide char table is after the header */
    CodePageTable->WideCharTable = TableBase + NlsFileHeader->HeaderSize + 1 +
                                   TableBase[NlsFileHeader->HeaderSize];
 
    /* Then multibyte table (256 wchars) follows */
    CodePageTable->MultiByteTable = TableBase + NlsFileHeader->HeaderSize + 1;
 
    /* Check the presence of glyph table (256 wchars) */
    if (!CodePageTable->MultiByteTable[256])
    {
        CodePageTable->DBCSRanges = CodePageTable->MultiByteTable + 256 + 1;
    }
    else
    {
        CodePageTable->DBCSRanges = CodePageTable->MultiByteTable + 256 + 1 + 256;
    }
 
    /* Is this double-byte code page? */
    if (*CodePageTable->DBCSRanges)
    {
        CodePageTable->DBCSCodePage = 1;
        CodePageTable->DBCSOffsets = CodePageTable->DBCSRanges + 1;
    }
    else
    {
        CodePageTable->DBCSCodePage = 0;
        CodePageTable->DBCSOffsets = NULL;
    }
}

Referenced by NLS_ReadFile().

NLS_IsDBCSCodePage()

BOOL NLS_IsDBCSCodePage

(

PCPTABLEINFO

CodePageTable

)

Definition at line 91 of file nls.c.

{
    return (BOOL)CodePageTable->DBCSCodePage;
}

Referenced by BestFit_FromNLS(), and NLS_IsDefaultCharForUnicode().

NLS_IsDefaultCharForMB()

BOOL NLS_IsDefaultCharForMB	(	PCPTABLEINFO	CodePageTable,
		UCHAR	Char
	)

Definition at line 103 of file nls.c.

{
    if (CodePageTable->MultiByteTable[Char] != CodePageTable->UniDefaultChar)
        return FALSE;
 
    return TRUE;
}

Referenced by BestFit_FromNLS(), and NLS_RecordsCountForMBTable().

NLS_IsDefaultCharForUnicode()

BOOL NLS_IsDefaultCharForUnicode	(	PCPTABLEINFO	CodePageTable,
		USHORT	Char
	)

Definition at line 112 of file nls.c.

{
    USHORT CodePageChar;
 
    if (NLS_IsDBCSCodePage(CodePageTable))
    {
        PUSHORT MultiByteTable = (PUSHORT)CodePageTable->WideCharTable;
        CodePageChar = MultiByteTable[Char];
    }
    else
    {
        PUCHAR SingleByteTable = (PUCHAR)CodePageTable->WideCharTable;
        CodePageChar = SingleByteTable[Char];
    }
 
    if (CodePageChar != CodePageTable->DefaultChar)
        return FALSE;
 
    return TRUE;
}

Referenced by BestFit_FromNLS(), and NLS_RecordsCountForUnicodeTable().

NLS_IsGlyphTablePresent()

BOOL NLS_IsGlyphTablePresent

(

PCPTABLEINFO

CodePageTable

)

Definition at line 97 of file nls.c.

{
    return (CodePageTable->MultiByteTable[256]) ? TRUE : FALSE;
}

Referenced by BestFit_FromNLS(), and NLS_RecordsCountForGlyphTable().

NLS_ReadFile()

PUSHORT NLS_ReadFile	(	const WCHAR *	pszFile,
		PCPTABLEINFO	CodePageTable
	)

Definition at line 58 of file nls.c.

{
    HANDLE hFile;
 
    hFile = CreateFile(pszFile, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0, NULL);
    if (hFile != INVALID_HANDLE_VALUE)
    {
        PUSHORT pData;
        DWORD dwRead;
        DWORD dwFileSize;
 
        dwFileSize = GetFileSize(hFile, NULL);
        pData = malloc(dwFileSize);
        if (pData != NULL)
        {
            if (ReadFile(hFile, pData, dwFileSize, &dwRead, NULL) != FALSE)
            {
                NLS_InitCodePageTable(pData, CodePageTable);
                CloseHandle(hFile);
 
                return pData;
            }
 
            free(pData);
        }
 
        CloseHandle(hFile);
    }
 
    return NULL;
}

Referenced by BestFit_FromNLS().

NLS_RecordsCountForDBCSTable()

USHORT NLS_RecordsCountForDBCSTable	(	PCPTABLEINFO	CodePageTable,
		UCHAR	LeadByte
	)

Definition at line 186 of file nls.c.

{
    PUSHORT LeadByteInfo = CodePageTable->DBCSOffsets;
    USHORT CodePageChar;
    USHORT Count = 0;
 
    for (CodePageChar = 0; CodePageChar <= 0xFF; CodePageChar++)
    {
        USHORT Info = LeadByteInfo[LeadByte];
 
        if (Info && LeadByteInfo[Info + CodePageChar] != CodePageTable->UniDefaultChar)
        {
            Count++;
        }
    }
 
    return Count;
}

Referenced by BestFit_FromNLS().

NLS_RecordsCountForGlyphTable()

USHORT NLS_RecordsCountForGlyphTable

(

PCPTABLEINFO

CodePageTable

)

Definition at line 164 of file nls.c.

{
    USHORT Count = 0;
 
    if (NLS_IsGlyphTablePresent(CodePageTable))
    {
        PUSHORT GlyphTable = CodePageTable->MultiByteTable + 256 + 1;
        USHORT CodePageChar;
 
        for (CodePageChar = 0; CodePageChar <= 0xFF; CodePageChar++)
        {
            USHORT Char = GlyphTable[CodePageChar];
 
            if (Char != CodePageTable->UniDefaultChar)
                Count++;
        }
    }
 
    return Count;
}

Referenced by BestFit_FromNLS().

NLS_RecordsCountForMBTable()

USHORT NLS_RecordsCountForMBTable

(

PCPTABLEINFO

CodePageTable

)

Definition at line 134 of file nls.c.

{
    USHORT CodePageChar;
    USHORT Count = 0;
 
    for (CodePageChar = 0; CodePageChar <= 0xFF; CodePageChar++)
    {
        if (!NLS_IsDefaultCharForMB(CodePageTable, CodePageChar))
            Count++;
    }
 
    return Count;
}

Referenced by BestFit_FromNLS().

NLS_RecordsCountForUnicodeTable()

USHORT NLS_RecordsCountForUnicodeTable

(

PCPTABLEINFO

CodePageTable

)

Definition at line 149 of file nls.c.

{
    ULONG UnicodeChar;
    USHORT Count = 0;
 
    for (UnicodeChar = 0; UnicodeChar <= 0xFFFF; UnicodeChar++)
    {
        if (!NLS_IsDefaultCharForUnicode(CodePageTable, UnicodeChar))
            Count++;
    }
 
    return Count;
}

Referenced by BestFit_FromNLS().