Base functions for views

1 files changed, 13 insertions, 4 deletions

diff --git a/pcilib/unit.h b/pcilib/unit.h
index 9c62ff3..e0eeefc 100644
--- a/pcilib/unit.h
+++ b/pcilib/unit.h
@@ -4,6 +4,8 @@
 #include <pcilib.h>
 
 #define PCILIB_UNIT_INVALID ((pcilib_unit_t)-1)
+#define PCILIB_UNIT_TRANSFORM_INVALID ((pcilib_unit_transform_t)-1)
+
 #define PCILIB_MAX_TRANSFORMS_PER_UNIT 16			/**< Limits number of supported transforms per unit */
 
 typedef struct pcilib_unit_context_s *pcilib_unit_context_t;
@@ -12,13 +14,13 @@ typedef struct pcilib_unit_context_s *pcilib_unit_context_t;
  * unit transformation routines
  */
 typedef struct {
-    char *unit;									/**< Name of the resulting unit */
-    char *transform;								/**< String, similar to view formula, explaining transform to this unit */
+    char *unit;								                /**< Name of the resulting unit */
+    char *transform;							                /**< String, similar to view formula, explaining transform to this unit */
 } pcilib_unit_transform_t;
 
 typedef struct {
-    char *name;									/**< Unit name */
-    pcilib_unit_transform_t transforms[PCILIB_MAX_TRANSFORMS_PER_UNIT + 1];	/**< Transforms to other units */
+    char *name;										/**< Unit name */
+    pcilib_unit_transform_t transforms[PCILIB_MAX_TRANSFORMS_PER_UNIT + 1];		/**< Transforms to other units */
 } pcilib_unit_description_t;
 
 #ifdef __cplusplus
@@ -26,7 +28,14 @@ extern "C" {
 #endif
 
 int pcilib_add_units(pcilib_t *ctx, size_t n, const pcilib_unit_description_t *desc);
+
 pcilib_unit_t pcilib_find_unit_by_name(pcilib_t *ctx, const char *unit);
+pcilib_unit_transform_t *pcilib_find_transform_by_unit_names(pcilib_t *ctx, const char *from, const char *to);
+
+    // value is modified
+int pcilib_transform_unit(pcilib_t *ctx, pcilib_unit_transform_t *trans, pcilib_value_t *value);
+int pcilib_transform_unit_by_name(pcilib_t *ctx, const char *to, pcilib_value_t *value);
+
 
 #ifdef __cplusplus
 }