#ifndef _RAZOR_H_

 #define _RAZOR_H_

 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))

 struct razor_set;

 struct razor_package;

 struct razor_property;

 enum razor_property_type {

 	RAZOR_PROPERTY_REQUIRES,

 	RAZOR_PROPERTY_PROVIDES,

 	RAZOR_PROPERTY_CONFLICTS,

 	RAZOR_PROPERTY_OBSOLETES

 };

 enum razor_version_relation {

 	RAZOR_VERSION_LESS,

 	RAZOR_VERSION_LESS_OR_EQUAL,

 	RAZOR_VERSION_EQUAL,

 	RAZOR_VERSION_GREATER_OR_EQUAL,

 	RAZOR_VERSION_GREATER

 };

 extern const char * const razor_version_relations[];

 struct razor_set *razor_set_create(void);

 struct razor_set *razor_set_open(const char *filename);

 void razor_set_destroy(struct razor_set *set);

 int razor_set_write_to_fd(struct razor_set *set, int fd);

 int razor_set_write(struct razor_set *set, const char *filename);

 struct razor_package *

 razor_set_get_package(struct razor_set *set, const char *package);

 struct razor_package_iterator;

 struct razor_package_iterator *

 razor_package_iterator_create(struct razor_set *set);

 struct razor_package_iterator *

 razor_package_iterator_create_for_property(struct razor_set *set,

 					   struct razor_property *property);

 struct razor_package_iterator *

 razor_package_iterator_create_for_file(struct razor_set *set,

 				       const char *filename);

 int razor_package_iterator_next(struct razor_package_iterator *pi,

 				struct razor_package **package,

 				const char **name,

 				const char **version,

 				const char **arch);

 void razor_package_iterator_destroy(struct razor_package_iterator *pi);

 struct razor_property_iterator;

 struct razor_property_iterator *

 razor_property_iterator_create(struct razor_set *set,

 			       struct razor_package *package);

 int razor_property_iterator_next(struct razor_property_iterator *pi,

 				 struct razor_property **property,

 				 const char **name,

 				 enum razor_version_relation *relation,

 				 const char **version,

 				 enum razor_property_type *type);

 void

 razor_property_iterator_destroy(struct razor_property_iterator *pi);

 void razor_set_list_files(struct razor_set *set, const char *prefix);

 void razor_set_list_package_files(struct razor_set *set, const char *name);

 void razor_set_list_unsatisfied(struct razor_set *set);

 typedef void (*razor_package_callback_t)(const char *name,

 					 const char *old_version,

 					 const char *new_version,

 					 const char *arch,

 					 void *data);

 void

 razor_set_diff(struct razor_set *set, struct razor_set *upstream,

 	       razor_package_callback_t callback, void *data);

 /* Package transactions */

 enum razor_transaction_package_state {

 	/* Basic states */

 	RAZOR_PACKAGE_INSTALL,

 	RAZOR_PACKAGE_FORCED_UPDATE,

 	RAZOR_PACKAGE_REMOVE,

 	RAZOR_PACKAGE_OBSOLETED,

 	/* Error states */

 	RAZOR_PACKAGE_FIRST_ERROR_STATE = 0x4,

 	RAZOR_PACKAGE_UNAVAILABLE_FLAG = 0x4,

 	/* Package requested for install does not exist */

 	RAZOR_PACKAGE_INSTALL_UNAVAILABLE = RAZOR_PACKAGE_INSTALL | RAZOR_PACKAGE_UNAVAILABLE_FLAG,

 	/* Package requiring update does not have any update */

 	RAZOR_PACKAGE_UPDATE_UNAVAILABLE = RAZOR_PACKAGE_FORCED_UPDATE | RAZOR_PACKAGE_UNAVAILABLE_FLAG,

 	/* Package requested for removal does not exist */

 	RAZOR_PACKAGE_REMOVE_NOT_INSTALLED = RAZOR_PACKAGE_REMOVE | RAZOR_PACKAGE_UNAVAILABLE_FLAG,

 	/* (not used) */

 	RAZOR_PACKAGE_OBSOLETE_UNAVAILABLE = RAZOR_PACKAGE_OBSOLETED | RAZOR_PACKAGE_UNAVAILABLE_FLAG,

 	/* No newer version of package is available */

 	RAZOR_PACKAGE_UP_TO_DATE,

 	/* Package marked for both install and remove */

 	RAZOR_PACKAGE_CONTRADICTION,

 	/* Package would add a conflict with an already-installed package */

 	RAZOR_PACKAGE_NEW_CONFLICT,

 	/* Already-installed package has a conflict against this package */

 	RAZOR_PACKAGE_OLD_CONFLICT,

 	/* Requirement of to-be-installed package can't be satisfied */

 	RAZOR_PACKAGE_UNSATISFIABLE,

 };

 struct razor_transaction *

 razor_transaction_create(struct razor_set *system, struct razor_set *upstream);

 void razor_transaction_install_package(struct razor_transaction *transaction,

 				       struct razor_package *package);

 void razor_transaction_remove_package(struct razor_transaction *transaction,

 				      struct razor_package *package);

 void razor_transaction_update_all(struct razor_transaction *transaction);

 int razor_transaction_resolve(struct razor_transaction *trans);

 struct razor_set *razor_transaction_finish(struct razor_transaction *trans);

 void razor_transaction_destroy(struct razor_transaction *trans);

 /* Temporary helper for test suite. */

 int razor_transaction_unsatisfied_property(struct razor_transaction *trans,

 					   const char *name,

 					   enum razor_version_relation rel,

 					   const char *version);

 /* Importer interface; for building a razor set from external sources,

  * like yum, rpmdb or razor package files. */

 struct razor_importer;

 struct razor_rpm;

 struct razor_importer *razor_importer_new(void);

 void razor_importer_destroy(struct razor_importer *importer);

 void razor_importer_begin_package(struct razor_importer *importer,

 				  const char *name,

 				  const char *version,

 				  const char *arch);

 void razor_importer_add_property(struct razor_importer *importer,

 				 const char *name,

 				 enum razor_version_relation relation,

 				 const char *version,

 				 enum razor_property_type type);

 void razor_importer_add_file(struct razor_importer *importer,

 			     const char *name);

 void razor_importer_finish_package(struct razor_importer *importer);

 int razor_importer_add_rpm(struct razor_importer *importer,

 			   struct razor_rpm *rpm);

 struct razor_set *razor_importer_finish(struct razor_importer *importer);

 void razor_build_evr(char *evr_buf, int size, const char *epoch,

 		     const char *version, const char *release);

 struct razor_set *razor_set_create_from_yum(void);

 struct razor_set *razor_set_create_from_rpmdb(void);

 /* RPM functions */

 struct razor_rpm *razor_rpm_open(const char *filename);

 int razor_rpm_install(struct razor_rpm *rpm, const char *root);

 int razor_rpm_close(struct razor_rpm *rpm);

 #endif /* _RAZOR_H_ */