path: root/camel/camel-mime-filter-chomp.c

/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
/*
 *  Copyright (C) 2002 Ximian, Inc.
 *
 *  Authors: Jeffrey Stedfast <fejj@ximian.com>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program 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
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */


#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <ctype.h>

#include "camel-mime-filter-chomp.h"

static void filter (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
            char **out, size_t *outlen, size_t *outprespace);
static void complete (CamelMimeFilter *f, char *in, size_t len,
              size_t prespace, char **out, size_t *outlen,
              size_t *outprespace);
static void reset (CamelMimeFilter *f);


static void
camel_mime_filter_chomp_class_init (CamelMimeFilterChompClass *klass)
{
    CamelMimeFilterClass *mime_filter_class =
        (CamelMimeFilterClass *) klass;
    
    mime_filter_class->filter = filter;
    mime_filter_class->complete = complete;
    mime_filter_class->reset = reset;
}

CamelType
camel_mime_filter_chomp_get_type (void)
{
    static CamelType type = CAMEL_INVALID_TYPE;
    
    if (type == CAMEL_INVALID_TYPE) {
        type = camel_type_register (camel_mime_filter_get_type(), "CamelMimeFilterChomp",
                        sizeof (CamelMimeFilterChomp),
                        sizeof (CamelMimeFilterChompClass),
                        (CamelObjectClassInitFunc) camel_mime_filter_chomp_class_init,
                        NULL,
                        NULL,
                        NULL);
    }
    
    return type;
}

static void
filter (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
    char **out, size_t *outlen, size_t *outprespace)
{
    register unsigned char *inptr, *s;
    const unsigned char *inend;
    register char *outptr;
    
    camel_mime_filter_set_size (f, len + prespace, FALSE);
    
    inend = in + len;
    inptr = in;
    
    outptr = f->outbuf;
    
    while (inptr < inend) {
        s = inptr;
        while (inptr < inend && isspace ((int) *inptr))
            inptr++;
        
        if (inptr < inend) {
            while (s < inptr)
                *outptr++ = (char) *s++;
            
            while (inptr < inend && !isspace ((int) *inptr))
                *outptr++ = (char) *inptr++;
        } else {
#if 0
            if ((inend - s) >= 2 && *s == '\r' && *(s + 1) == '\n')
                *outptr++ = *s++;
            if (*s == '\n')
                *outptr++ = *s++;
#endif      
            if (s < inend)
                camel_mime_filter_backup (f, s, inend - s);
            break;
        }
    }
    
    *out = f->outbuf;
    *outlen = outptr - f->outbuf;
    *outprespace = f->outpre;
}

static void 
complete (CamelMimeFilter *f, char *in, size_t len, size_t prespace,
      char **out, size_t *outlen, size_t *outprespace)
{
    unsigned char *inptr;
    char *outptr;
    
    if (len)
        filter (f, in, len, prespace, out, outlen, outprespace);
    
    if (f->backlen) {
        inptr = (unsigned char *) f->backbuf;
        outptr = f->outbuf + *outlen;
        
        /* in the case of a canonical eoln */
        if (*inptr == '\r' && *(inptr + 1) == '\n') {
            *outptr++ = (char) *inptr++;
            (*outlen)++;
        }
        
        if (*inptr == '\n') {
            *outptr++ = (char) *inptr++;
            (*outlen)++;
        }
        
        /* to protect against further complete calls */
        camel_mime_filter_backup (f, "", 0);
    }
}

static void
reset (CamelMimeFilter *f)
{
    /* no-op */
}

CamelMimeFilter *
camel_mime_filter_chomp_new (void)
{
    CamelMimeFilterChomp *chomp = CAMEL_MIME_FILTER_CHOMP (camel_object_new (CAMEL_MIME_FILTER_CHOMP_TYPE));
    
    return (CamelMimeFilter *) chomp;
}