diff options
Diffstat (limited to 'common/buffer.c')
| -rw-r--r-- | common/buffer.c | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/common/buffer.c b/common/buffer.c deleted file mode 100644 index f2e2cb8..0000000 --- a/common/buffer.c +++ /dev/null @@ -1,197 +0,0 @@ -/* - * Copyright (C) 2007, 2012 Stefan Walter - * Copyright (C) 2013 Red Hat Inc. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * * Redistributions of source code must retain the above - * copyright notice, this list of conditions and the - * following disclaimer. - * * Redistributions in binary form must reproduce the - * above copyright notice, this list of conditions and - * the following disclaimer in the documentation and/or - * other materials provided with the distribution. - * * The names of contributors to this software may not be - * used to endorse or promote products derived from this - * software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, - * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF - * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH - * DAMAGE. - * - * Author: Stef Walter <stef@thewalter.net> - */ - -#include "config.h" - -#include "buffer.h" -#include "debug.h" - -#include <assert.h> -#include <stdint.h> -#include <stdlib.h> -#include <string.h> -#include <stdarg.h> - -static bool -buffer_realloc (p11_buffer *buffer, - size_t size) -{ - void *data; - - /* Memory owned elsewhere can't be reallocated */ - return_val_if_fail (buffer->frealloc != NULL, false); - - /* Reallocate built in buffer using allocator */ - data = (buffer->frealloc) (buffer->data, size); - if (!data && size > 0) { - p11_buffer_fail (buffer); - return_val_if_reached (false); - } - - buffer->data = data; - buffer->size = size; - return true; -} - -bool -p11_buffer_init (p11_buffer *buffer, - size_t reserve) -{ - p11_buffer_init_full (buffer, NULL, 0, 0, realloc, free); - return buffer_realloc (buffer, reserve); -} - -bool -p11_buffer_init_null (p11_buffer *buffer, - size_t reserve) -{ - p11_buffer_init_full (buffer, NULL, 0, P11_BUFFER_NULL, realloc, free); - return buffer_realloc (buffer, reserve); -} - -void -p11_buffer_init_full (p11_buffer *buffer, - void *data, - size_t len, - int flags, - void * (* frealloc) (void *, size_t), - void (* ffree) (void *)) -{ - memset (buffer, 0, sizeof (*buffer)); - - buffer->data = data; - buffer->len = len; - buffer->size = len; - buffer->flags = flags; - buffer->frealloc = frealloc; - buffer->ffree = ffree; - - return_if_fail (!(flags & P11_BUFFER_FAILED)); -} - -void -p11_buffer_uninit (p11_buffer *buffer) -{ - return_if_fail (buffer != NULL); - - if (buffer->ffree && buffer->data) - (buffer->ffree) (buffer->data); - memset (buffer, 0, sizeof (*buffer)); -} - -void * -p11_buffer_steal (p11_buffer *buffer, - size_t *length) -{ - void *data; - - return_val_if_fail (p11_buffer_ok (buffer), NULL); - - if (length) - *length = buffer->len; - data = buffer->data; - - buffer->data = NULL; - buffer->size = 0; - buffer->len = 0; - return data; -} - -bool -p11_buffer_reset (p11_buffer *buffer, - size_t reserve) -{ - buffer->flags &= ~P11_BUFFER_FAILED; - buffer->len = 0; - - if (reserve < buffer->size) - return true; - return buffer_realloc (buffer, reserve); -} - -void * -p11_buffer_append (p11_buffer *buffer, - size_t length) -{ - unsigned char *data; - size_t terminator; - size_t newlen; - size_t reserve; - - return_val_if_fail (p11_buffer_ok (buffer), NULL); - - terminator = (buffer->flags & P11_BUFFER_NULL) ? 1 : 0; - - /* Check for unlikely and unrecoverable integer overflow */ - return_val_if_fail (SIZE_MAX - (terminator + length) > buffer->len, NULL); - - reserve = terminator + length + buffer->len; - - if (reserve > buffer->size) { - - /* Calculate a new length, minimize number of buffer allocations */ - return_val_if_fail (buffer->size < SIZE_MAX / 2, NULL); - newlen = buffer->size * 2; - if (!newlen) - newlen = 16; - if (reserve > newlen) - newlen = reserve; - - if (!buffer_realloc (buffer, newlen)) - return_val_if_reached (NULL); - } - - data = buffer->data; - data += buffer->len; - buffer->len += length; - if (terminator) - data[length] = '\0'; - return data; -} - -void -p11_buffer_add (p11_buffer *buffer, - const void *data, - ssize_t length) -{ - void *at; - - if (length < 0) - length = strlen (data); - - at = p11_buffer_append (buffer, length); - return_if_fail (at != NULL); - memcpy (at, data, length); -} |