add libgamma_name_of_error and libgamma_value_of_error

Signed-off-by: Mattias Andrée <maandree@operamail.com>

1 files changed, 88 insertions, 0 deletions

diff --git a/src/libgamma-error.c.gpp b/src/libgamma-error.c.gpp
new file mode 100644
index 0000000..93f8542
--- /dev/null
+++ b/src/libgamma-error.c.gpp
@@ -0,0 +1,88 @@
+/* -*- c -*- */
+/**
+ * libgamma — Display server abstraction layer for gamma ramp adjustments
+ * Copyright © 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.h"
+
+
+#include <stddef.h>
+#include <sys/types.h>
+#include <string.h>
+
+
+
+/**
+ * Group that the user needs to be a member of if `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned.
+ */
+gid_t libgamma_group_gid = 0;
+
+/**
+ * Group that the user needs to be a member of if `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
+ * `NULL` if the name of the group `libgamma_group_gid` cannot be determined.
+ */
+const char* libgamma_group_name = NULL;
+
+
+
+£>set -u
+£>cd info
+£>export PATH=".:${PATH}"
+
+
+/**
+ * Returns the name of the definition associated with a libgamma error code.
+ * 
+ * @param   value  The error code.
+ * @return         The name of the definition associated with the error code,
+ *                 `NULL` if the error code does not exist. The return string
+ *                 should not be `free`:d.
+ */
+const char* libgamma_name_of_error(int value)
+{
+  static const char* error_names[] =
+    {
+£>for error in $(libgamma-error-extract --list); do
+      "£{error}",
+£>done
+    };
+  
+  if ((value < LIBGAMMA_ERROR_MIN) || (value >= 0))
+    return NULL;
+  
+  return error_names[-value - 1];
+}
+
+
+/**
+ * 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 does is `NULL`
+ *                or does not refer to an libgamma error.
+ */
+int libgamma_value_of_error(const char* name)
+{
+  if (name == NULL)
+    return 0;
+  
+£>for error in $(libgamma-error-extract --list); do
+  if (!strcmp(name, "£{error}"))  return £{error};
+£>done
+  
+  return 0;
+}
+