fold.c File Reference

#include "wine/unicode.h"

Include dependency graph for fold.c:

Go to the source code of this file.

Functions
static WCHAR	to_unicode_digit (WCHAR ch)
static WCHAR	to_unicode_native (WCHAR ch)
static int	get_ligature_len (WCHAR wc)
static const WCHAR *	get_ligature (WCHAR wc)
int	wine_fold_string (int flags, const WCHAR *src, int srclen, WCHAR *dst, int dstlen)

Variables
static const WCHAR	wine_ligatures []
static const WCHAR	wine_expanded_ligatures [][4]

Function Documentation

get_ligature()

static const WCHAR * get_ligature ( WCHAR  wc )

inlinestatic

Definition at line 100 of file fold.c.

{
    static const WCHAR empty_ligature[] = { '\0','\0','\0', 0 };
    int low = 0, high = sizeof(wine_ligatures)/sizeof(WCHAR) -1;
    while (low <= high)
    {
        int pos = (low + high) / 2;
        if (wine_ligatures[pos] < wc)
            low = pos + 1;
        else if (wine_ligatures[pos] > wc)
            high = pos - 1;
        else
            return wine_expanded_ligatures[pos];
    }
    return empty_ligature;
}

Referenced by wine_fold_string().

get_ligature_len()

static int get_ligature_len ( WCHAR  wc )

inlinestatic

Definition at line 84 of file fold.c.

{
    int low = 0, high = sizeof(wine_ligatures)/sizeof(WCHAR) -1;
    while (low <= high)
    {
        int pos = (low + high) / 2;
        if (wine_ligatures[pos] < wc)
            low = pos + 1;
        else if (wine_ligatures[pos] > wc)
            high = pos - 1;
        else
            return wine_expanded_ligatures[pos][3];
    }
    return 0;
}

Referenced by wine_fold_string().

to_unicode_digit()

static WCHAR to_unicode_digit ( WCHAR  ch )

inlinestatic

Definition at line 23 of file fold.c.

{
    extern const WCHAR wine_digitmap[] DECLSPEC_HIDDEN;
    return ch + wine_digitmap[wine_digitmap[ch >> 8] + (ch & 0xff)];
}

Referenced by wine_fold_string().

to_unicode_native()

static WCHAR to_unicode_native ( WCHAR  ch )

inlinestatic

Definition at line 29 of file fold.c.

{
    extern const WCHAR wine_compatmap[] DECLSPEC_HIDDEN;
    return ch + wine_compatmap[wine_compatmap[ch >> 8] + (ch & 0xff)];
}

Referenced by wine_fold_string().

wine_fold_string()

int wine_fold_string	(	int	flags,
		const WCHAR *	src,
		int	srclen,
		WCHAR *	dst,
		int	dstlen
	)

Definition at line 118 of file fold.c.

{
    WCHAR *dstbase = dst;
    const WCHAR *expand;
    int i;
 
    if (srclen == -1)
        srclen = strlenW(src) + 1; /* Include terminating NUL in count */
 
    if (!dstlen)
    {
        /* Calculate the required size for dst */
        dstlen = srclen;
 
        if (flags & MAP_EXPAND_LIGATURES)
        {
            while (srclen--)
            {
                dstlen += get_ligature_len(*src);
                src++;
            }
        }
        else if (flags & MAP_COMPOSITE)
        {
            /* FIXME */
        }
        else if (flags & MAP_PRECOMPOSED)
        {
            /* FIXME */
        }
        return dstlen;
    }
 
    if (srclen > dstlen)
        return 0;
 
    dstlen -= srclen;
 
    /* Actually perform the mapping(s) specified */
    for (i = 0; i < srclen; i++)
    {
        WCHAR ch = *src;
 
        if (flags & MAP_EXPAND_LIGATURES)
        {
            expand = get_ligature(ch);
            if (expand[0])
            {
                if (!dstlen--)
                    return 0;
                dst[0] = expand[0];
                if (expand[2])
                {
                    if (!dstlen--)
                        return 0;
                    *++dst = expand[1];
                    ch = expand[2];
                }
                else
                    ch = expand[1];
                dst++;
            }
        }
        else if (flags & MAP_COMPOSITE)
        {
            /* FIXME */
        }
        else if (flags & MAP_PRECOMPOSED)
        {
            /* FIXME */
        }
        if (flags & MAP_FOLDDIGITS)
            ch = to_unicode_digit(ch);
        if (flags & MAP_FOLDCZONE)
            ch = to_unicode_native(ch);
 
        *dst++ = ch;
        src++;
    }
    return dst - dstbase;
}

Variable Documentation

wine_expanded_ligatures

const WCHAR wine_expanded_ligatures[][4]

static

Definition at line 45 of file fold.c.

Referenced by get_ligature(), and get_ligature_len().

wine_ligatures

const WCHAR wine_ligatures[]

static

Initial value:

=
{
    0x00c6, 0x00de, 0x00df, 0x00e6, 0x00fe, 0x0132, 0x0133, 0x0152,
    0x0153, 0x01c4, 0x01c5, 0x01c6, 0x01c7, 0x01c8, 0x01c9, 0x01ca,
    0x01cb, 0x01cc, 0x01e2, 0x01e3, 0x01f1, 0x01f2, 0x01f3, 0x01fc,
    0x01fd, 0x05f0, 0x05f1, 0x05f2, 0xfb00, 0xfb01, 0xfb02, 0xfb03,
    0xfb04, 0xfb05, 0xfb06
}

Definition at line 35 of file fold.c.

Referenced by get_ligature(), and get_ligature_len().