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authorMattias Andrée <maandree@operamail.com>2014-09-02 19:13:59 +0200
committerMattias Andrée <maandree@operamail.com>2014-09-02 19:13:59 +0200
commit433d4ef335b71b09729af5a9273c6ec78f3c475d (patch)
treef58d4af6e2e40daa93d0601d0671435eed8e1ccc /src/libgamma-error.cc
parentadd readme (diff)
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most of libgamma-error
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'src/libgamma-error.cc')
-rw-r--r--src/libgamma-error.cc77
1 files changed, 77 insertions, 0 deletions
diff --git a/src/libgamma-error.cc b/src/libgamma-error.cc
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+/**
+ * libgammamm -- C++ wrapper for libgamma
+ * Copyright (C) 2014 Mattias Andrée (maandree@member.fsf.org)
+ *
+ * This library 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 library. If not, see <http://www.gnu.org/licenses/>.
+ */
+#include "libgamma-error.hh"
+#include <iostream>
+
+
+namespace libgamma
+{
+ /**
+ * Prints an error to stderr in a `perror` fashion,
+ * however this function will not translate the `libgamma`
+ * errors into human-readable strings, it will simply
+ * print the name of the error. If the value `error_code`
+ * is the value of `LIBGAMMA_ERRNO_SET`, `perror` will be
+ * used to print the current error stored in `errno`.
+ * If `error_code` is non-negative (an `errno` value`), that
+ * value will be stored in `errno` and `perror` will be
+ * used to print it. Additionally, if the `error_code` is
+ * the value of `LIBGAMMA_DEVICE_REQUIRE_GROUP` the
+ * required group will be printed with its numerical value
+ * and, if known, its name.
+ *
+ * @param name The text to add at the beginning.
+ * @param value The error code, may be an `errno` value.
+ */
+ void perror(const std::string name, int error_code)
+ {
+ libgamma_perror(name.c_str(), error_code);
+ }
+
+ /**
+ * Returns the name of the definition associated with a `nullptr` error code.
+ *
+ * @param value The error code.
+ * @return The name of the definition associated with the error code,
+ * `nullptr` if the error code does not exist.
+ */
+ std::string* name_of_error(int value)
+ {
+ const char* cstr = libgamma_name_of_error(value);
+ if (cstr == nullptr)
+ return nullptr;
+ return new std::string(cstr);
+ }
+
+ /**
+ * Return the value of a `libgamma` error definition refered to by name.
+ *
+ * @param name The name of the definition associated with the error code.
+ * @return The error code, zero if the name is `nullptr`
+ * or does not refer to a `libgamma` error.
+ */
+ int value_of_error(const std::string* name)
+ {
+ const char* cstr = nullptr;
+ if (name != nullptr)
+ cstr = name->c_str();
+ return libgamma_value_of_error(cstr);
+ }
+
+}
+