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authorJörg Frings-Fürst <debian@jff-webhosting.net>2019-07-31 17:00:58 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2019-07-31 17:00:58 +0200
commitd087d778ffb62e2713cb848540bcc819470365bd (patch)
treed69692a274dd1c7d0672e6bb7155a0fc106f9d49 /backend/genesys_error.h
parentc8bd2513ecba169cff44c09c8058c36987357b18 (diff)
parent3759ce55ba79b8d3b9d8ed247a252273ee7dade3 (diff)
Merge branch 'feature/upstream' into develop
Diffstat (limited to 'backend/genesys_error.h')
-rw-r--r--backend/genesys_error.h202
1 files changed, 202 insertions, 0 deletions
diff --git a/backend/genesys_error.h b/backend/genesys_error.h
new file mode 100644
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+++ b/backend/genesys_error.h
@@ -0,0 +1,202 @@
+/* sane - Scanner Access Now Easy.
+
+ Copyright (C) 2019 Povilas Kanapickas <povilas@radix.lt>
+
+ This file is part of the SANE package.
+
+ 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., 59 Temple Place - Suite 330, Boston,
+ MA 02111-1307, USA.
+
+ As a special exception, the authors of SANE give permission for
+ additional uses of the libraries contained in this release of SANE.
+
+ The exception is that, if you link a SANE library with other files
+ to produce an executable, this does not by itself cause the
+ resulting executable to be covered by the GNU General Public
+ License. Your use of that executable is in no way restricted on
+ account of linking the SANE library code into it.
+
+ This exception does not, however, invalidate any other reasons why
+ the executable file might be covered by the GNU General Public
+ License.
+
+ If you submit changes to SANE to the maintainers to be included in
+ a subsequent release, you agree by submitting the changes that
+ those changes may be distributed with this exception intact.
+
+ If you write modifications of your own for SANE, it is your choice
+ whether to permit this exception to apply to your modifications.
+ If you do not wish that, delete this exception notice.
+*/
+
+#ifndef BACKEND_GENESYS_ERROR_H
+#define BACKEND_GENESYS_ERROR_H
+
+#include "../include/sane/config.h"
+#include "../include/sane/sane.h"
+#include "../include/sane/sanei_backend.h"
+
+#include <stdexcept>
+#include <cstring>
+#include <string>
+
+#define DBG_error0 0 /* errors/warnings printed even with devuglevel 0 */
+#define DBG_error 1 /* fatal errors */
+#define DBG_init 2 /* initialization and scanning time messages */
+#define DBG_warn 3 /* warnings and non-fatal errors */
+#define DBG_info 4 /* informational messages */
+#define DBG_proc 5 /* starting/finishing functions */
+#define DBG_io 6 /* io functions */
+#define DBG_io2 7 /* io functions that are called very often */
+#define DBG_data 8 /* log image data */
+
+class SaneException : std::exception {
+public:
+ SaneException(SANE_Status status) : status_(status)
+ {
+ set_msg(nullptr);
+ }
+
+ SaneException(SANE_Status status, const char* msg) : status_(status)
+ {
+ set_msg(msg);
+ }
+
+ SaneException(const char* msg) : SaneException(SANE_STATUS_INVAL, msg) {}
+
+ SANE_Status status() const { return status_; }
+ virtual const char* what() const noexcept override { return msg_.c_str(); }
+
+private:
+
+ void set_msg(const char* msg)
+ {
+ const char* status_msg = sane_strstatus(status_);
+ std::size_t status_msg_len = std::strlen(status_msg);
+
+ if (msg) {
+ std::size_t msg_len = std::strlen(msg);
+ msg_.reserve(msg_len + status_msg_len + 3);
+ msg_ = msg;
+ msg_ += " : ";
+ msg_ += status_msg;
+ return;
+ }
+
+ msg_.reserve(status_msg_len);
+ msg_ = status_msg;
+ }
+
+ std::string msg_;
+ SANE_Status status_;
+};
+
+/**
+ * call a function and return on error
+ */
+#define RIE(function) \
+ do { status = function; \
+ if (status != SANE_STATUS_GOOD) \
+ { \
+ DBG(DBG_error, "%s: %s\n", __func__, sane_strstatus (status)); \
+ return status; \
+ } \
+ } while (SANE_FALSE)
+
+// call a function and throw an exception on error
+#define TIE(function) \
+ do { \
+ SANE_Status tmp_status = function; \
+ if (tmp_status != SANE_STATUS_GOOD) { \
+ throw SaneException(tmp_status); \
+ } \
+ } while (false)
+
+#define DBGSTART DBG (DBG_proc, "%s start\n", __func__);
+#define DBGCOMPLETED DBG (DBG_proc, "%s completed\n", __func__);
+
+class DebugMessageHelper {
+public:
+ static constexpr unsigned MAX_BUF_SIZE = 120;
+
+ DebugMessageHelper(const char* func);
+ DebugMessageHelper(const char* func, const char* format, ...)
+ #ifdef __GNUC__
+ __attribute__((format(printf, 3, 4)))
+ #endif
+ ;
+
+ ~DebugMessageHelper();
+
+ void status(const char* msg) { vstatus("%s", msg); }
+ void vstatus(const char* format, ...)
+ #ifdef __GNUC__
+ __attribute__((format(printf, 2, 3)))
+ #endif
+ ;
+
+ void clear() { msg_[0] = '\n'; }
+
+private:
+ const char* func_ = nullptr;
+ char msg_[MAX_BUF_SIZE];
+ unsigned num_exceptions_on_enter_ = 0;
+};
+
+#define DBG_HELPER(var) DebugMessageHelper var(__func__)
+#define DBG_HELPER_ARGS(var, ...) DebugMessageHelper var(__func__, __VA_ARGS__)
+
+template<class F>
+SANE_Status wrap_exceptions_to_status_code(const char* func, F&& function)
+{
+ try {
+ return function();
+ } catch (const SaneException& exc) {
+ return exc.status();
+ } catch (const std::bad_alloc& exc) {
+ return SANE_STATUS_NO_MEM;
+ } catch (const std::exception& exc) {
+ DBG(DBG_error, "%s: got uncaught exception: %s\n", func, exc.what());
+ return SANE_STATUS_INVAL;
+ } catch (...) {
+ DBG(DBG_error, "%s: got unknown uncaught exception\n", func);
+ return SANE_STATUS_INVAL;
+ }
+}
+
+template<class F>
+void catch_all_exceptions(const char* func, F&& function)
+{
+ try {
+ function();
+ } catch (const SaneException& exc) {
+ DBG(DBG_error, "%s: got exception: %s\n", func, exc.what());
+ } catch (const std::bad_alloc& exc) {
+ DBG(DBG_error, "%s: got exception: could not allocate memory: %s\n", func, exc.what());
+ } catch (const std::exception& exc) {
+ DBG(DBG_error, "%s: got uncaught exception: %s\n", func, exc.what());
+ } catch (...) {
+ DBG(DBG_error, "%s: got unknown uncaught exception\n", func);
+ }
+}
+
+inline void wrap_status_code_to_exception(SANE_Status status)
+{
+ if (status == SANE_STATUS_GOOD)
+ return;
+ throw SaneException(status);
+}
+
+#endif // BACKEND_GENESYS_ERROR_H