server/unicode.c

/*
 * Unicode routines for use inside the server
 *
 * Copyright (C) 1999 Alexandre Julliard
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include <ctype.h>
#include <stdio.h>

#include "unicode.h"

/* dump a Unicode string with proper escaping */
int dump_strW( const WCHAR *str, size_t len, FILE *f, char escape[2] )
{
    static const char escapes[32] = ".......abtnvfr.............e....";
    char buffer[256];
    char *pos = buffer;
    int count = 0;

    for (; len; str++, len--)
    {
        if (pos > buffer + sizeof(buffer) - 8)
        {
            fwrite( buffer, pos - buffer, 1, f );
            count += pos - buffer;
            pos = buffer;
        }
        if (*str > 127)  /* hex escape */
        {
            if (len > 1 && str[1] < 128 && isxdigit((char)str[1]))
                pos += sprintf( pos, "\\x%04x", *str );
            else
                pos += sprintf( pos, "\\x%x", *str );
            continue;
        }
        if (*str < 32)  /* octal or C escape */
        {
            if (!*str && len == 1) continue;  /* do not output terminating NULL */
            if (escapes[*str] != '.')
                pos += sprintf( pos, "\\%c", escapes[*str] );
            else if (len > 1 && str[1] >= '0' && str[1] <= '7')
                pos += sprintf( pos, "\\%03o", *str );
            else
                pos += sprintf( pos, "\\%o", *str );
            continue;
        }
        if (*str == '\\' || *str == escape[0] || *str == escape[1]) *pos++ = '\\';
        *pos++ = *str;
    }
    fwrite( buffer, pos - buffer, 1, f );
    count += pos - buffer;
    return count;
}