/alps/pcitool

#ifndef _PCILIB_PY_H

#define _PCILIB_PY_H

#include <pcilib.h>

#include <pcilib/error.h>

#define pcilib_python_error(...)	pcilib_log_python_error(__FILE__, __LINE__, PCILIB_LOG_DEFAULT, PCILIB_LOG_ERROR, __VA_ARGS__)

#define pcilib_python_warning(...)	pcilib_log_python_error(__FILE__, __LINE__, PCILIB_LOG_DEFAULT, PCILIB_LOG_WARNING, __VA_ARGS__)

typedef struct pcilib_py_s pcilib_py_t;

typedef void pcilib_py_object;

#ifdef __cplusplus

extern "C" {

#endif

void pcilib_log_python_error(const char *file, int line, pcilib_log_flags_t flags, pcilib_log_priority_t prio, const char *msg, ...);

/** Initializes Python engine 

 *

 * This function will return success if Python support is disabled. Only functions

 * executing python call, like pcilib_py_eval_string(), return errors. Either way,

 * no script directories are configured. The pcilib_add_script_dir() call is used

 * for this purpose.

 * 

 * @param[in,out] ctx 	- pcilib context

 * @return 		- error or 0 on success

 */

int pcilib_init_py(pcilib_t *ctx);

/** Cleans up memory used by various python structures 

 * and finalyzes python environment if pcilib is not started from python script

 *

 * @param[in] ctx 	- the pcilib_t context

 */

void pcilib_free_py(pcilib_t *ctx);

/** Add an additional path to look for python scripts

 *

 * The default location for python files is /usr/local/share/pcilib/models/@b{model}.

 * This can be altered using CMake PCILIB_MODEL_DIR variable while building or using 

 * PCILIB_MODEL_DIR environmental variable dynamicly. The default location is added

 * with @b{location} = NULL. Additional directories can be added as well either 

 * by specifying relative path from the default directory or absolute path in the 

 * system.

 *

 * @param[in,out] ctx 	- pcilib context

 * @param[in] location 	- NULL or path to additional scripts

 * @return 		- error or 0 on success

 */

int pcilib_py_add_script_dir(pcilib_t *ctx, const char *location);

/** Loads the specified python script

 *

 * Once loaded the script is available until pcilib context is destryoed.

 * 

 * @param[in,out] ctx 	- pcilib context

 * @param[in] name	- script name, the passed variable is referenced and, hence, should have static duration

 * @return 		- error or 0 on success

 */

int pcilib_py_load_script(pcilib_t *ctx, const char *name);

/** Check if the specified script can be used as transform view and detects transform configuration

 *

 * @param[in,out] ctx 	- pcilib context

 * @param[in] name	- script name

 * @param[out] mode	- supported access mode (read/write/read-write)

 * @return 		- error or 0 on success

 */

int pcilib_py_get_transform_script_properties(pcilib_t *ctx, const char *name, pcilib_access_mode_t *mode);

/**

 * Get the PyObject from the polymorphic type. The returned value should be cleaned with Py_XDECREF()

 * @param[in] ctx	- pcilib context

 * @param[in] val	- initialized polymorphic value of arbitrary type

 * @param[out] err	- error code or 0 on sccuess

 * @return		- valid PyObject or NULL in the case of error

 */

pcilib_py_object *pcilib_get_value_as_pyobject(pcilib_t* ctx, pcilib_value_t *val, int *err);

/**

 * Initializes the polymorphic value from PyObject. If `val` already contains the value, cleans it first. 

 * Therefore, before first usage the value should be always initialized to 0.

 * @param[in] ctx       - pcilib context

 * @param[in,out] val   - initialized polymorphic value

 * @param[in] pyval     - valid PyObject* containing PyInt, PyFloat, or PyString

 * @return              - 0 on success or memory error

 */

int pcilib_set_value_from_pyobject(pcilib_t* ctx, pcilib_value_t *val, pcilib_py_object *pyval);

/** Evaluates the specified python code and returns result in @b{val}

 *

 * The python code may include special variables which will be substituted by pcitool before executing Python interpreter

 * @b{$value} 		- will be replaced by the current value of the @b{val} parameter

 * @b{$reg}		- will be replaced by the current value of the specified register @b{reg}

 * @b{${/prop/temp}}	- will be replaced by the current value of the specified property @b{/prop/temp} 

 * @b{${/prop/temp:C}}	- will be replaced by the current value of the specified property @b{/prop/temp} in the given units

 * @param[in,out] ctx 	- pcilib context

 * @param[in] codestr	- python code to evaluate

 * @param[in,out] val	- Should contain the value which will be substituted in place of @b{$value} and on 

 * 			successful execution will contain the computed value

 * @return 		- error or 0 on success

 */

int pcilib_py_eval_string(pcilib_t *ctx, const char *codestr, pcilib_value_t *val);

/** Execute the specified function in the Python script which was loaded with pcilib_py_load_script() call

 *

 * The function is expected to accept two paramters. The first parameter is pcipywrap context and the @b{val}

 * is passed as the second parameter. The return value of the script will be returned in the @b{val} as well.

 * If function returns Py_None, the value of @b{val} will be unchanged.

 *

 * @param[in,out] ctx 	- pcilib context

 * @param[in] script	- script name

 * @param[in] func	- function name

 * @param[in,out] val	- Should contain the value of second parameter of the function before call and on 

 * 			successful return will contain the returned value

 * @return 		- error or 0 on success

 */

int pcilib_py_eval_func(pcilib_t *ctx, const char *script, const char *func, pcilib_value_t *val);

#ifdef __cplusplus

}

#endif

#endif /* _PCILIB_PY_H */