strw_ltrimany.c

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/* ltrimw$ ANY function */

#include "fb.h"

FBCALL FB_WCHAR *fb_WstrLTrimAny ( const FB_WCHAR *src, const FB_WCHAR *pattern )
{
    const FB_WCHAR *pachText;
        FB_WCHAR        *dst;
        ssize_t len;

    if( src == NULL ) {
        return NULL;
    }

        len = fb_wstr_Len( src );
    {
        ssize_t len_pattern = fb_wstr_Len( pattern );
        pachText = src;
                while ( len != 0 )
        {
            ssize_t i;
            for( i=0; i!=len_pattern; ++i ) {
                if( wcschr( pattern, *pachText )!=NULL ) {
                    break;
                }
            }
            if( i==len_pattern ) {
                break;
            }
            --len;
            ++pachText;
                }
        }

        if( len > 0 )
        {
                /* alloc temp string */
        dst = fb_wstr_AllocTemp( len );
                if( dst != NULL )
                {
                        /* simple copy */
                        fb_wstr_Copy( dst, pachText, len );
                }
                else
                        dst = NULL;
    }
        else
                dst = NULL;

        return dst;
}