Split source files, merge public header files, eliminite use gpp, rewrite makefile

Signed-off-by: Mattias Andrée <maandree@kth.se>

1 files changed, 31 insertions, 0 deletions

diff --git a/libgamma_method_default_site.c b/libgamma_method_default_site.c
new file mode 100644
index 0000000..5da2c72
--- /dev/null
+++ b/libgamma_method_default_site.c
@@ -0,0 +1,31 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * Return the default site for an adjustment method
+ * 
+ * @param   method  The adjustment method (display server and protocol)
+ * @return          The default site, `NULL` if it cannot be determined or
+ *                  if multiple sites are not supported by the adjustment
+ *                  method
+ */
+const char *
+libgamma_method_default_site(int method)
+{
+	const char *restrict var = libgamma_method_default_site_variable(method);
+	const char *restrict env;
+
+	/* Return `NULL` if there is no variable to read */
+	if (!var)
+		return NULL;
+
+	/* Read the variable */
+	env = getenv(var);
+	/* Return `NULL` if it does not exist (or is empty) */
+	if (!env || !*env)
+		return NULL;
+
+	/* Return the variable's value */
+	return env;
+}