1 files changed, 33 insertions, 0 deletions
diff --git a/src/bin/psql/variables.h b/src/bin/psql/variables.h
new file mode 100644
index 00000000000..9e2dd2e3a7b
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+++ b/src/bin/psql/variables.h
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+/* This implements a sort of variable repository. One could also think of it
+ * as cheap version of an associative array. In each one of these
+ * datastructures you can store name/value pairs.
+ *
+ * All functions (should) follow the Shit-In-Shit-Out (SISO) principle, i.e.,
+ * you can pass them NULL pointers and the like and they will return something
+ * appropriate.
+ */
+
+#ifndef VARIABLES_H
+#define VARIABLES_H
+#include <c.h>
+
+#define VALID_VARIABLE_CHARS "abcdefghijklmnopqrstuvwxyz0123456789_"
+
+struct _variable {
+    char * name;
+    char * value;
+    struct _variable * next;
+};
+
+typedef struct _variable * VariableSpace;
+
+
+VariableSpace CreateVariableSpace(void);
+const char * GetVariable(VariableSpace space, const char * name);
+bool GetVariableBool(VariableSpace space, const char * name);
+bool SetVariable(VariableSpace space, const char * name, const char * value);
+bool DeleteVariable(VariableSpace space, const char * name);
+void DestroyVariableSpace(VariableSpace space);
+
+
+#endif /* VARIABLES_H */