diff options
Diffstat (limited to 'wiretap/buffer.c')
| -rw-r--r-- | wiretap/buffer.c | 162 |
1 files changed, 0 insertions, 162 deletions
diff --git a/wiretap/buffer.c b/wiretap/buffer.c deleted file mode 100644 index e12c8de5f6..0000000000 --- a/wiretap/buffer.c +++ /dev/null @@ -1,162 +0,0 @@ -/* buffer.c - * - * Wiretap Library - * Copyright (c) 1998 by Gilbert Ramirez <gram@alumni.rice.edu> - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - * - * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - * - */ -#include "config.h" - -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <glib.h> - -#include "buffer.h" - -/* Initializes a buffer with a certain amount of allocated space */ -void -buffer_init(Buffer* buffer, gsize space) -{ - buffer->data = (guint8*)g_malloc(space); - buffer->allocated = space; - buffer->start = 0; - buffer->first_free = 0; -} - -/* Frees the memory used by a buffer */ -void -buffer_free(Buffer* buffer) -{ - g_free(buffer->data); - buffer->data = NULL; -} - -/* Assures that there are 'space' bytes at the end of the used space - so that another routine can copy directly into the buffer space. After - doing that, the routine will also want to run - buffer_increase_length(). */ -void -buffer_assure_space(Buffer* buffer, gsize space) -{ - gsize available_at_end = buffer->allocated - buffer->first_free; - gsize space_used; - gboolean space_at_beginning; - - /* If we've got the space already, good! */ - if (space <= available_at_end) { - return; - } - - /* Maybe we don't have the space available at the end, but we would - if we moved the used space back to the beginning of the - allocation. The buffer could have become fragmented through lots - of calls to buffer_remove_start(). I'm using buffer->start as the - same as 'available_at_start' in this comparison. */ - - /* or maybe there's just no more room. */ - - space_at_beginning = buffer->start >= space; - if (space_at_beginning || buffer->start > 0) { - space_used = buffer->first_free - buffer->start; - /* this memory copy better be safe for overlapping memory regions! */ - memmove(buffer->data, buffer->data + buffer->start, space_used); - buffer->start = 0; - buffer->first_free = space_used; - } - /*if (buffer->start >= space) {*/ - if (space_at_beginning) { - return; - } - - /* We'll allocate more space */ - buffer->allocated += space + 1024; - buffer->data = (guint8*)g_realloc(buffer->data, buffer->allocated); -} - -void -buffer_append(Buffer* buffer, guint8 *from, gsize bytes) -{ - buffer_assure_space(buffer, bytes); - memcpy(buffer->data + buffer->first_free, from, bytes); - buffer->first_free += bytes; -} - -void -buffer_remove_start(Buffer* buffer, gsize bytes) -{ - if (buffer->start + bytes > buffer->first_free) { - g_error("buffer_remove_start trying to remove %" G_GINT64_MODIFIER "u bytes. s=%" G_GINT64_MODIFIER "u ff=%" G_GINT64_MODIFIER "u!\n", - (guint64)bytes, (guint64)buffer->start, - (guint64)buffer->first_free); - /** g_error() does an abort() and thus never returns **/ - } - buffer->start += bytes; - - if (buffer->start == buffer->first_free) { - buffer->start = 0; - buffer->first_free = 0; - } -} - - -#ifndef SOME_FUNCTIONS_ARE_DEFINES -void -buffer_clean(Buffer* buffer) -{ - buffer_remove_start(buffer, buffer_length(buffer)); -} -#endif - -#ifndef SOME_FUNCTIONS_ARE_DEFINES -void -buffer_increase_length(Buffer* buffer, gsize bytes) -{ - buffer->first_free += bytes; -} -#endif - -#ifndef SOME_FUNCTIONS_ARE_DEFINES -gsize -buffer_length(Buffer* buffer) -{ - return buffer->first_free - buffer->start; -} -#endif - -#ifndef SOME_FUNCTIONS_ARE_DEFINES -guint8 * -buffer_start_ptr(Buffer* buffer) -{ - return buffer->data + buffer->start; -} -#endif - -#ifndef SOME_FUNCTIONS_ARE_DEFINES -guint8 * -buffer_end_ptr(Buffer* buffer) -{ - return buffer->data + buffer->first_free; -} -#endif - -#ifndef SOME_FUNCTIONS_ARE_DEFINES -void -buffer_append_buffer(Buffer* buffer, Buffer* src_buffer) -{ - buffer_append(buffer, buffer_start_ptr(src_buffer), buffer_length(src_buffer)); -} -#endif |