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-rw-r--r--libkdenetwork/libgpgme-copy/gpgme/data-mem.c251
1 files changed, 251 insertions, 0 deletions
diff --git a/libkdenetwork/libgpgme-copy/gpgme/data-mem.c b/libkdenetwork/libgpgme-copy/gpgme/data-mem.c
new file mode 100644
index 000000000..c76981166
--- /dev/null
+++ b/libkdenetwork/libgpgme-copy/gpgme/data-mem.c
@@ -0,0 +1,251 @@
+/* data-mem.c - A memory based data object.
+ Copyright (C) 2002, 2003, 2004 g10 Code GmbH
+
+ This file is part of GPGME.
+
+ GPGME 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.
+
+ GPGME 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 program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA. */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <errno.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <assert.h>
+#include <string.h>
+
+#include "data.h"
+#include "util.h"
+
+
+static ssize_t
+mem_read (gpgme_data_t dh, void *buffer, size_t size)
+{
+ size_t amt = dh->data.mem.length - dh->data.mem.offset;
+ const char *src;
+
+ if (!amt)
+ return 0;
+
+ if (size < amt)
+ amt = size;
+
+ src = dh->data.mem.buffer ? dh->data.mem.buffer : dh->data.mem.orig_buffer;
+ memcpy (buffer, src + dh->data.mem.offset, amt);
+ dh->data.mem.offset += amt;
+ return amt;
+}
+
+
+static ssize_t
+mem_write (gpgme_data_t dh, const void *buffer, size_t size)
+{
+ size_t unused;
+
+ if (!dh->data.mem.buffer && dh->data.mem.orig_buffer)
+ {
+ size_t new_size = dh->data.mem.size;
+ char *new_buffer;
+
+ if (new_size < dh->data.mem.offset + size)
+ new_size = dh->data.mem.offset + size;
+
+ new_buffer = malloc (new_size);
+ if (!new_buffer)
+ return -1;
+ memcpy (new_buffer, dh->data.mem.orig_buffer, dh->data.mem.length);
+
+ dh->data.mem.buffer = new_buffer;
+ dh->data.mem.size = new_size;
+ }
+
+ unused = dh->data.mem.size - dh->data.mem.offset;
+ if (unused < size)
+ {
+ /* Allocate a large enough buffer with exponential backoff. */
+#define INITIAL_ALLOC 512
+ size_t new_size = dh->data.mem.size
+ ? (2 * dh->data.mem.size) : INITIAL_ALLOC;
+ char *new_buffer;
+
+ if (new_size < dh->data.mem.offset + size)
+ new_size = dh->data.mem.offset + size;
+
+ new_buffer = realloc (dh->data.mem.buffer, new_size);
+ if (!new_buffer && new_size > dh->data.mem.offset + size)
+ {
+ /* Maybe we were too greedy, try again. */
+ new_size = dh->data.mem.offset + size;
+ new_buffer = realloc (dh->data.mem.buffer, new_size);
+ }
+ if (!new_buffer)
+ return -1;
+ dh->data.mem.buffer = new_buffer;
+ dh->data.mem.size = new_size;
+ }
+
+ memcpy (dh->data.mem.buffer + dh->data.mem.offset, buffer, size);
+ dh->data.mem.offset += size;
+ if (dh->data.mem.length < dh->data.mem.offset)
+ dh->data.mem.length = dh->data.mem.offset;
+ return size;
+}
+
+
+static off_t
+mem_seek (gpgme_data_t dh, off_t offset, int whence)
+{
+ switch (whence)
+ {
+ case SEEK_SET:
+ if (offset < 0 || offset > dh->data.mem.length)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ dh->data.mem.offset = offset;
+ break;
+ case SEEK_CUR:
+ if ((offset > 0 && dh->data.mem.length - dh->data.mem.offset < offset)
+ || (offset < 0 && dh->data.mem.offset < -offset))
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ dh->data.mem.offset += offset;
+ break;
+ case SEEK_END:
+ if (offset > 0 || -offset > dh->data.mem.length)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ dh->data.mem.offset = dh->data.mem.length - offset;
+ break;
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+ return dh->data.mem.offset;
+}
+
+
+static void
+mem_release (gpgme_data_t dh)
+{
+ if (dh->data.mem.buffer)
+ free (dh->data.mem.buffer);
+}
+
+
+static struct _gpgme_data_cbs mem_cbs =
+ {
+ mem_read,
+ mem_write,
+ mem_seek,
+ mem_release,
+ NULL
+ };
+
+
+/* Create a new data buffer and return it in R_DH. */
+gpgme_error_t
+gpgme_data_new (gpgme_data_t *dh)
+{
+ gpgme_error_t err = _gpgme_data_new (dh, &mem_cbs);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+
+/* Create a new data buffer filled with SIZE bytes starting from
+ BUFFER. If COPY is zero, copying is delayed until necessary, and
+ the data is taken from the original location when needed. */
+gpgme_error_t
+gpgme_data_new_from_mem (gpgme_data_t *dh, const char *buffer,
+ size_t size, int copy)
+{
+ gpgme_error_t err = _gpgme_data_new (dh, &mem_cbs);
+ if (err)
+ return err;
+
+ if (copy)
+ {
+ char *bufcpy = malloc (size);
+ if (!bufcpy)
+ _gpgme_data_release (*dh);
+ memcpy (bufcpy, buffer, size);
+ (*dh)->data.mem.buffer = bufcpy;
+ }
+ else
+ (*dh)->data.mem.orig_buffer = buffer;
+
+ (*dh)->data.mem.size = size;
+ (*dh)->data.mem.length = size;
+ return 0;
+}
+
+
+/* Destroy the data buffer DH and return a pointer to its content.
+ The memory has be to released with gpgme_free() by the user. It's
+ size is returned in R_LEN. */
+char *
+gpgme_data_release_and_get_mem (gpgme_data_t dh, size_t *r_len)
+{
+ char *str = NULL;
+
+ if (!dh || dh->cbs != &mem_cbs)
+ {
+ gpgme_data_release (dh);
+ return NULL;
+ }
+
+ str = dh->data.mem.buffer;
+ if (!str && dh->data.mem.orig_buffer)
+ {
+ str = malloc (dh->data.mem.length);
+ if (!str)
+ {
+ gpgme_data_release (dh);
+ return NULL;
+ }
+ memcpy (str, dh->data.mem.orig_buffer, dh->data.mem.length);
+ }
+ else
+ /* Prevent mem_release from releasing the buffer memory. We must
+ not fail from this point. */
+ dh->data.mem.buffer = NULL;
+
+ if (r_len)
+ *r_len = dh->data.mem.length;
+
+ gpgme_data_release (dh);
+
+ return str;
+}
+
+
+/* Release the memory returned by gpgme_data_release_and_get_mem(). */
+void
+gpgme_free (void *buffer)
+{
+ if (buffer)
+ free (buffer);
+}
+