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authorTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-16 16:06:07 -0600
committerTimothy Pearson <kb9vqf@pearsoncomputing.net>2011-11-16 16:06:07 -0600
commitbe0ca741fd12897337408d1d7a7d8f5f18e1fac9 (patch)
treeb9fa3458193a17180d8773a0204ee05ae206cd99 /libtdenetwork/libgpgme-copy/gpgme/data.c
parentbbb7afdb6da2969535e7f05715e2cb95cfdc917c (diff)
downloadtdepim-be0ca741fd12897337408d1d7a7d8f5f18e1fac9.tar.gz
tdepim-be0ca741fd12897337408d1d7a7d8f5f18e1fac9.zip
Finish rename from prior commit
Diffstat (limited to 'libtdenetwork/libgpgme-copy/gpgme/data.c')
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diff --git a/libtdenetwork/libgpgme-copy/gpgme/data.c b/libtdenetwork/libgpgme-copy/gpgme/data.c
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+/* data.c - An abstraction for data objects.
+ Copyright (C) 2002, 2003, 2004, 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA. */
+
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+
+#include "gpgme.h"
+#include "data.h"
+#include "util.h"
+#include "ops.h"
+#include "priv-io.h"
+
+
+gpgme_error_t
+_gpgme_data_new (gpgme_data_t *r_dh, struct _gpgme_data_cbs *cbs)
+{
+ gpgme_data_t dh;
+
+ if (!r_dh)
+ return gpg_error (GPG_ERR_INV_VALUE);
+
+ *r_dh = NULL;
+ dh = calloc (1, sizeof (*dh));
+ if (!dh)
+ return gpg_error_from_errno (errno);
+
+ dh->cbs = cbs;
+
+ *r_dh = dh;
+ return 0;
+}
+
+
+void
+_gpgme_data_release (gpgme_data_t dh)
+{
+ if (!dh)
+ return;
+
+ if (dh->file_name)
+ free (dh->file_name);
+ free (dh);
+}
+
+
+/* Read up to SIZE bytes into buffer BUFFER from the data object with
+ the handle DH. Return the number of characters read, 0 on EOF and
+ -1 on error. If an error occurs, errno is set. */
+ssize_t
+gpgme_data_read (gpgme_data_t dh, void *buffer, size_t size)
+{
+ if (!dh)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ if (!dh->cbs->read)
+ {
+ errno = ENOSYS;
+ return -1;
+ }
+ return (*dh->cbs->read) (dh, buffer, size);
+}
+
+
+/* Write up to SIZE bytes from buffer BUFFER to the data object with
+ the handle DH. Return the number of characters written, or -1 on
+ error. If an error occurs, errno is set. */
+ssize_t
+gpgme_data_write (gpgme_data_t dh, const void *buffer, size_t size)
+{
+ if (!dh)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ if (!dh->cbs->write)
+ {
+ errno = ENOSYS;
+ return -1;
+ }
+ return (*dh->cbs->write) (dh, buffer, size);
+}
+
+
+/* Set the current position from where the next read or write starts
+ in the data object with the handle DH to OFFSET, relativ to
+ WHENCE. */
+off_t
+gpgme_data_seek (gpgme_data_t dh, off_t offset, int whence)
+{
+ if (!dh)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ if (!dh->cbs->seek)
+ {
+ errno = ENOSYS;
+ return -1;
+ }
+
+ /* For relative movement, we must take into account the actual
+ position of the read counter. */
+ if (whence == SEEK_CUR)
+ offset -= dh->pending_len;
+
+ offset = (*dh->cbs->seek) (dh, offset, whence);
+ if (offset >= 0)
+ dh->pending_len = 0;
+
+ return offset;
+}
+
+
+/* Release the data object with the handle DH. */
+void
+gpgme_data_release (gpgme_data_t dh)
+{
+ if (!dh)
+ return;
+
+ if (dh->cbs->release)
+ (*dh->cbs->release) (dh);
+ _gpgme_data_release (dh);
+}
+
+
+/* Get the current encoding meta information for the data object with
+ handle DH. */
+gpgme_data_encoding_t
+gpgme_data_get_encoding (gpgme_data_t dh)
+{
+ return dh ? dh->encoding : GPGME_DATA_ENCODING_NONE;
+}
+
+
+/* Set the encoding meta information for the data object with handle
+ DH to ENC. */
+gpgme_error_t
+gpgme_data_set_encoding (gpgme_data_t dh, gpgme_data_encoding_t enc)
+{
+ if (!dh)
+ return gpg_error (GPG_ERR_INV_VALUE);
+ if (enc < 0 || enc > GPGME_DATA_ENCODING_ARMOR)
+ return gpg_error (GPG_ERR_INV_VALUE);
+ dh->encoding = enc;
+ return 0;
+}
+
+
+/* Set the file name associated with the data object with handle DH to
+ FILE_NAME. */
+gpgme_error_t
+gpgme_data_set_file_name (gpgme_data_t dh, const char *file_name)
+{
+ if (!dh)
+ return gpg_error (GPG_ERR_INV_VALUE);
+
+ if (dh->file_name)
+ free (dh->file_name);
+
+ if (file_name)
+ {
+ dh->file_name = strdup (file_name);
+ if (!dh->file_name)
+ return gpg_error_from_errno (errno);
+ }
+ else
+ dh->file_name = 0;
+
+ return 0;
+}
+
+/* Get the file name associated with the data object with handle DH,
+ or NULL if there is none. */
+char *
+gpgme_data_get_file_name (gpgme_data_t dh)
+{
+ if (!dh)
+ return NULL;
+
+ return dh->file_name;
+}
+
+
+/* Functions to support the wait interface. */
+
+gpgme_error_t
+_gpgme_data_inbound_handler (void *opaque, int fd)
+{
+ gpgme_data_t dh = (gpgme_data_t) opaque;
+ char buffer[BUFFER_SIZE];
+ char *bufp = buffer;
+ ssize_t buflen;
+
+ buflen = _gpgme_io_read (fd, buffer, BUFFER_SIZE);
+ if (buflen < 0)
+ return gpg_error_from_errno (errno);
+ if (buflen == 0)
+ {
+ _gpgme_io_close (fd);
+ return 0;
+ }
+
+ do
+ {
+ ssize_t amt = gpgme_data_write (dh, bufp, buflen);
+ if (amt == 0 || (amt < 0 && errno != EINTR))
+ return gpg_error_from_errno (errno);
+ bufp += amt;
+ buflen -= amt;
+ }
+ while (buflen > 0);
+ return 0;
+}
+
+
+gpgme_error_t
+_gpgme_data_outbound_handler (void *opaque, int fd)
+{
+ gpgme_data_t dh = (gpgme_data_t) opaque;
+ ssize_t nwritten;
+
+ if (!dh->pending_len)
+ {
+ ssize_t amt = gpgme_data_read (dh, dh->pending, BUFFER_SIZE);
+ if (amt < 0)
+ return gpg_error_from_errno (errno);
+ if (amt == 0)
+ {
+ _gpgme_io_close (fd);
+ return 0;
+ }
+ dh->pending_len = amt;
+ }
+
+ nwritten = _gpgme_io_write (fd, dh->pending, dh->pending_len);
+ if (nwritten == -1 && errno == EAGAIN)
+ return 0;
+
+ if (nwritten == -1 && errno == EPIPE)
+ {
+ /* Not much we can do. The other end closed the pipe, but we
+ still have data. This should only ever happen if the other
+ end is going to tell us what happened on some other channel.
+ Silently close our end. */
+ _gpgme_io_close (fd);
+ return 0;
+ }
+
+ if (nwritten <= 0)
+ return gpg_error_from_errno (errno);
+
+ if (nwritten < dh->pending_len)
+ memmove (dh->pending, dh->pending + nwritten, dh->pending_len - nwritten);
+ dh->pending_len -= nwritten;
+ return 0;
+}
+
+
+/* Get the file descriptor associated with DH, if possible. Otherwise
+ return -1. */
+int
+_gpgme_data_get_fd (gpgme_data_t dh)
+{
+ if (!dh || !dh->cbs->get_fd)
+ return -1;
+ return (*dh->cbs->get_fd) (dh);
+}