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#ifndef _PCILIB_UNIT_H
#define _PCILIB_UNIT_H
#include <uthash.h>
#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;
/**
* unit transformation routines
*/
typedef struct {
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 */
} pcilib_unit_description_t;
struct pcilib_unit_context_s {
const char *name;
pcilib_unit_t unit;
UT_hash_handle hh;
};
#ifdef __cplusplus
extern "C" {
#endif
int pcilib_add_units(pcilib_t *ctx, size_t n, const pcilib_unit_description_t *desc);
void pcilib_clean_units(pcilib_t *ctx);
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
}
#endif
#endif /* _PCILIB_UNIT_H */
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