/** * Copyright 2005-2007 ECMWF * * Licensed under the GNU Lesser General Public License which * incorporates the terms and conditions of version 3 of the GNU * General Public License. * See LICENSE and gpl-3.0.txt for details. */ /*! \file grib_api.h \brief grib_api C header file This is the only file that must be included to use the grib_api library from C. */ #ifndef grib_api_H #define grib_api_H #ifdef __cplusplus extern "C" { #endif #include #include #include #include #ifndef HAVE_FSEEKO #define off_t long #endif #define GRIB_API_VERSION (GRIB_API_MAJOR_VERSION*10000+GRIB_API_MINOR_VERSION*100+GRIB_API_REVISION_VERSION) /* LOG MODES Log mode for information for processiong information */ /* Log mode for info */ #define GRIB_LOG_INFO 0 /* Log mode for warnings */ #define GRIB_LOG_WARNING 1 /* Log mode for errors */ #define GRIB_LOG_ERROR 2 /* Log mode for fatal errors */ #define GRIB_LOG_FATAL 3 /* Log mode for debug */ #define GRIB_LOG_DEBUG 4 /* Types */ /* undefined */ #define GRIB_TYPE_UNDEFINED 0 /* long integer */ #define GRIB_TYPE_LONG 1 /* double */ #define GRIB_TYPE_DOUBLE 2 /* char* */ #define GRIB_TYPE_STRING 3 /* bytes */ #define GRIB_TYPE_BYTES 4 /* section */ #define GRIB_TYPE_SECTION 5 /* labe */ #define GRIB_TYPE_LABEL 6 /* missing */ #define GRIB_TYPE_MISSING 7 /* Missing values */ #define GRIB_MISSING_LONG 0x80000001 #define GRIB_MISSING_DOUBLE -1e+100 /* Dump option flags*/ #define GRIB_DUMP_FLAG_READ_ONLY (1<<0) #define GRIB_DUMP_FLAG_DUMP_OK (1<<1) #define GRIB_DUMP_FLAG_VALUES (1<<2) #define GRIB_DUMP_FLAG_CODED (1<<3) #define GRIB_DUMP_FLAG_OCTECT (1<<4) #define GRIB_DUMP_FLAG_ALIASES (1<<5) #define GRIB_DUMP_FLAG_TYPE (1<<6) #define GRIB_DUMP_FLAG_HEXADECIMAL (1<<7) #define GRIB_DUMP_FLAG_NO_DATA (1<<8) #define GRIB_DUMP_FLAG_ALL_DATA (1<<9) /* grib_nearest flags */ #define GRIB_NEAREST_SAME_GRID (1<<0) #define GRIB_NEAREST_SAME_DATA (1<<1) #define GRIB_NEAREST_SAME_POINT (1<<2) /*! Iteration is carried out on all the keys available in the message \ingroup keys_iterator \see grib_keys_iterator_new */ #define GRIB_KEYS_ITERATOR_ALL_KEYS 0 /*! read only keys are skipped by keys iterator. \ingroup keys_iterator \see grib_keys_iterator_new */ #define GRIB_KEYS_ITERATOR_SKIP_READ_ONLY (1<<0) /*! optional keys are skipped by keys iterator. \ingroup keys_iterator \see grib_keys_iterator_new */ #define GRIB_KEYS_ITERATOR_SKIP_OPTIONAL (1<<1) /*! edition specific keys are skipped by keys iterator. \ingroup keys_iterator \see grib_keys_iterator_new */ #define GRIB_KEYS_ITERATOR_SKIP_EDITION_SPECIFIC (1<<2) /*! coded keys are skipped by keys iterator. \ingroup keys_iterator \see grib_keys_iterator_new */ #define GRIB_KEYS_ITERATOR_SKIP_CODED (1<<3) /*! computed keys are skipped by keys iterator. \ingroup keys_iterator \see grib_keys_iterator_new */ #define GRIB_KEYS_ITERATOR_SKIP_COMPUTED (1<<4) /*! duplicates of a key are skipped by keys iterator. \ingroup keys_iterator \see grib_keys_iterator_new */ #define GRIB_KEYS_ITERATOR_SKIP_DUPLICATES (1<<5) /*! function keys are skipped by keys iterator. \ingroup keys_iterator \see grib_keys_iterator_new */ #define GRIB_KEYS_ITERATOR_SKIP_FUNCTION (1<<6) typedef struct grib_values { const char* name; int type; long long_value; double double_value; const char* string_value; int error; int has_value; int equal; } grib_values; /*! Grib handle, structure giving access to parsed grib values by keys \ingroup grib_handle */ typedef struct grib_handle grib_handle; /*! Grib multi field handle, structure used to build multi fields messages. \ingroup grib_handle */ typedef struct grib_multi_handle grib_multi_handle; /*! Grib context, structure containing the memory methods, the parsers and the formats. \ingroup grib_context */ typedef struct grib_context grib_context; /*! Grib iterator, structure supporting a geographic iteration of values on a grib message. \ingroup grib_iterator */ typedef struct grib_iterator grib_iterator; /*! Grib nearest, structure used to find the nearest points of a latitude longitude point. \ingroup grib_iterator */ typedef struct grib_nearest grib_nearest; /*! Grib keys iterator. Iterator over keys. \ingroup keys_iterator */ typedef struct grib_keys_iterator grib_keys_iterator; typedef struct grib_fieldset grib_fieldset; typedef struct grib_order_by grib_order_by; typedef struct grib_where grib_where; typedef struct grib_darray grib_darray; typedef struct grib_iarray grib_iarray; grib_fieldset *grib_fieldset_new_from_files(grib_context *c, char *filenames[], int nfiles, char **keys, int nkeys, char *where_string, char *order_by_string, int *err); void grib_fieldset_delete(grib_fieldset* set); void grib_fieldset_rewind(grib_fieldset* set); int grib_fieldset_apply_order_by(grib_fieldset* set,const char* order_by_string); grib_handle* grib_fieldset_next_handle(grib_fieldset* set,int* err); int grib_fieldset_count(grib_fieldset *set); /*! \defgroup grib_index The grib_index The grib_index is the structure giving indexed access to messages in a file. */ /*! @{*/ /*! index structure to access messages in a file. */ typedef struct grib_index grib_index; /** * Create a new index form a file. The file is indexed with the keys in argument. * * @param c : context (NULL for default context) * @param filename : name of the file of messages to be indexed * @param keys : comma separated list of keys for the index. * The type of the key can be explicitly declared appending :l for long, * :d for double, :s for string to the key name. If the type is not * declared explicitly, the native type is assumed. * @param err : 0 if OK, integer value on error * @return the newly created index */ grib_index* grib_index_new_from_file(grib_context* c, char* filename,const char* keys,int *err); /** * Get the number of distinct values of the key in argument contained in the index. The key must belong to the index. * * @param index : an index created from a file. * The index must have been created with the key in argument. * @param key : key for which the number of values is computed * @param size : number of distinct values of the key in the index * @return 0 if OK, integer value on error */ int grib_index_get_size(grib_index* index,const char* key,size_t* size); /** * Get the distinct values of the key in argument contained in the index. The key must belong to the index. This function is used when the type of the key was explicitly defined as long or when the native type of the key is long. * * @param index : an index created from a file. * The index must have been created with the key in argument. * @param key : key for wich the values are returned * @param values : array of values. The array must be allocated before entering this function and its size must be enough to contain all the values. * @param size : size of the values array * @return 0 if OK, integer value on error */ int grib_index_get_long(grib_index* index,const char* key, long* values,size_t *size); /** * Get the distinct values of the key in argument contained in the index. The key must belong to the index. This function is used when the type of the key was explicitly defined as double or when the native type of the key is double. * * @param index : an index created from a file. * The index must have been created with the key in argument. * @param key : key for wich the values are returned * @param values : array of values. The array must be allocated before entering this function and its size must be enough to contain all the values. * @param size : size of the values array * @return 0 if OK, integer value on error */ int grib_index_get_double(grib_index* index,const char* key, double* values,size_t *size); /** * Get the distinct values of the key in argument contained in the index. The key must belong to the index. This function is used when the type of the key was explicitly defined as string or when the native type of the key is string. * * @param index : an index created from a file. * The index must have been created with the key in argument. * @param key : key for wich the values are returned * @param values : array of values. The array must be allocated before entering this function and its size must be enough to contain all the values. * @param size : size of the values array * @return 0 if OK, integer value on error */ int grib_index_get_string(grib_index* index,const char* key, char** values,size_t *size); /** * Select the message subset with key==value. The value is a long. The key must have been created with long type or have long as native type if the type was not explicitly defined in the index creation. * * @param index : an index created from a file. * The index must have been created with the key in argument. * @param key : key to be selected * @param value : value of the key to select * @return 0 if OK, integer value on error */ int grib_index_select_long(grib_index* index,const char* key,long value); /** * Select the message subset with key==value. The value is a double. The key must have been created with double type or have double as native type if the type was not explicitly defined in the index creation. * * @param index : an index created from a file. * The index must have been created with the key in argument. * @param key : key to be selected * @param value : value of the key to select * @return 0 if OK, integer value on error */ int grib_index_select_double(grib_index* index,const char* key,double value); /** * Select the message subset with key==value. The value is a string. The key must have been created with string type or have string as native type if the type was not explicitly defined in the index creation. * * @param index : an index created from a file. * The index must have been created with the key in argument. * @param key : key to be selected * @param value : value of the key to select * @return 0 if OK, integer value on error */ int grib_index_select_string(grib_index* index,const char* key,char* value); /** * Create a new handle from an index after having selected the key values. * All the keys belonging to the index must be selected before calling this function. Successive calls to this function will return all the handles compatible with the constraints defined selecting the values of the index keys. * When no more handles are available from the index a NULL pointer is returned and the err variable is set to GRIB_END_OF_INDEX. * * @param index : an index created from a file. * @param err : 0 if OK, integer value on error. GRIB_END_OF_INDEX when no more handles are contained in the index. * @return grib handle. */ grib_handle* grib_handle_new_from_index(grib_index* index,int *err); /** * Delete the index. * * @param index : index to be deleted. */ void grib_index_delete(grib_index* index); /*! @} */ /*! \defgroup grib_handle The grib_handle The grib_handle is the structure giving access to parsed grib values by keys. */ /*! @{*/ /** * Counts the messages contained in a file resource. * * @param c : the context from wich the handle will be created (NULL for default context) * @param f : the file resource * @param n : the number of messages in the file * @return 0 if OK, integer value on error */ int grib_count_in_file(grib_context* c, FILE* f,int* n); /** * Create a handle from a file resource. * The file is read until a message is found. The message is then copied. * Remember always to delete the handle when it is not needed any more to avoid * memory leaks. * * @param c : the context from wich the handle will be created (NULL for default context) * @param f : the file resource * @param error : error code set if the returned handle is NULL and the end of file is not reached * @return the new handle, NULL if the resource is invalid or a problem is encountered */ grib_handle* grib_handle_new_from_file (grib_context* c, FILE* f, int* error) ; /** * Create a handle from a user message. The message will not be freed at the end. * The message will be copied as soon as a modification is needed. * * @param c : the context from which the handle will be created (NULL for default context) * @param data : the actual message * @param data_len : the length of the message in number of bytes * @return the new handle, NULL if the message is invalid or a problem is encountered */ grib_handle* grib_handle_new_from_message(grib_context* c, void* data, size_t data_len); grib_handle* grib_handle_new_from_multi_message(grib_context* c,void** data, size_t *buflen,int* error); /** * Create a handle from a user message. The message is copied and will be freed with the handle * * @param c : the context from wich the handle will be created (NULL for default context) * @param data : the actual message * @param data_len : the length of the message in number of bytes * @return the new handle, NULL if the message is invalid or a problem is encountered */ grib_handle* grib_handle_new_from_message_copy(grib_context* c, const void* data, size_t data_len); /** * Create a handle from a read_only template resource. * The message is copied at the creation of the handle * * @param c : the context from wich the handle will be created (NULL for default context) * @param res_name : the resource name * @return the new handle, NULL if the resource is invalid or a problem is encountered */ grib_handle* grib_handle_new_from_template (grib_context* c, const char* res_name) ; /** * Create a handle from a message contained in a samples directory. * The message is copied at the creation of the handle * * @param c : the context from wich the handle will be created (NULL for default context) * @param res_name : the resource name * @return the new handle, NULL if the resource is invalid or a problem is encountered */ grib_handle* grib_handle_new_from_samples (grib_context* c, const char* res_name) ; /** * Clone an existing handle using the context of the original handle, * The message is copied and reparsed * * @param h : The handle to be cloned * @return the new handle, NULL if the message is invalid or a problem is encountered */ grib_handle* grib_handle_clone (grib_handle* h) ; /** * Frees a handle, also frees the message if it is not a user message * @see grib_handle_new_from_message * @param h : The handle to be deleted * @return 0 if OK, integer value on error */ int grib_handle_delete (grib_handle* h); /** * Create an empty multi field handle. * Remember always to delete the multi handle when it is not needed any more to avoid * memory leaks. * * @param c : the context from wich the handle will be created (NULL for default context) */ grib_multi_handle* grib_multi_handle_new (grib_context* c); /** * Append the sections starting with start_section of the message pointed by h at * the end of the multi field handle mh. * Remember always to delete the multi handle when it is not needed any more to avoid * memory leaks. * * @param h : The handle from which the sections are copied. * @param start_section : section number. Starting from this section all the sections to then end of the message will be copied. * @param mh : The multi field handle on which the sections are appended. * @return 0 if OK, integer value on error */ int grib_multi_handle_append(grib_handle* h,int start_section,grib_multi_handle* mh); /** * Delete multi field handle. * * @param mh : The multi field handle to be deleted. * @return 0 if OK, integer value on error */ int grib_multi_handle_delete(grib_multi_handle* mh); /** * Write a multi field handle in a file. * Remember always to delete the multi handle when it is not needed any more to avoid * memory leaks. * * @param mh : The multi field handle to be written. * @param f : File on which the file handle is written. * @return 0 if OK, integer value on error */ int grib_multi_handle_write(grib_multi_handle* mh,FILE* f); /*! @} */ /*! \defgroup handling_coded_messages Handling coded messages */ /*! @{ */ /** * getting the message attached to a handle * * @param h : the grib handle to wich the buffer should be gathered * @param message : the pointer to be set to the handle's data * @param message_length : at exist, the message size in number of bytes * @return 0 if OK, integer value on error */ int grib_get_message(grib_handle* h ,const void** message, size_t *message_length ); /** * getting a copy of the message attached to a handle * * @param h : the grib handle to wich the buffer should be returned * @param message : the pointer to the data buffer to be filled * @param message_length : at entry, the size in number of bytes of the allocated empty message. * At exist, the actual message length in number of bytes * @return 0 if OK, integer value on error */ int grib_get_message_copy(grib_handle* h , void* message,size_t *message_length ); /*! @} */ /*! \defgroup iterators Iterating on latitude/longitude/values */ /*! @{ */ /*! * \brief Create a new iterator from a handle, using current geometry and values. * * \param h : the handle from which the iterator will be created * \param flags : flags for future use. * \param error : error code * \return the new iterator, NULL if no iterator can be created */ grib_iterator* grib_iterator_new (grib_handle* h, unsigned long flags,int* error); /** * Get the next value from an iterator. * * @param i : the iterator * @param lat : on output latitude in degree * @param lon : on output longitude in degree * @param value : on output value of the point * @return positive value if successful, 0 if no more data are available */ int grib_iterator_next (grib_iterator *i, double* lat,double* lon,double* value); /** * Get the previous value from an iterator. * * @param i : the iterator * @param lat : on output latitude in degree * @param lon : on output longitude in degree * @param value : on output value of the point* * @return positive value if successful, 0 if no more data are available */ int grib_iterator_previous (grib_iterator *i, double* lat,double* lon,double* value); /** * Test procedure for values in an iterator. * * @param i : the iterator * @return boolean, 1 if the iterator still nave next values, 0 otherwise */ int grib_iterator_has_next (grib_iterator *i); /** * Test procedure for values in an iterator. * * @param i : the iterator * @return 0 if OK, integer value on error */ int grib_iterator_reset (grib_iterator *i); /** * Frees an iterator from memory * * @param i : the iterator * @return 0 if OK, integer value on error */ int grib_iterator_delete (grib_iterator *i); /*! * \brief Create a new nearest from a handle, using current geometry . * * \param h : the handle from which the iterator will be created * \param error : error code * \return the new nearest, NULL if no nearest can be created */ grib_nearest* grib_nearest_new (grib_handle* h, int* error); /** * Find the 4 nearest points of a latitude longitude point. * The flags are provided to speed up the process of searching. If you are * sure that the point you are asking for is not changing from a call * to another you can use GRIB_NEAREST_SAME_POINT. The same is valid for * the grid. Flags can be used together duing an or. * * @param nearest : nearest structure * @param h : handle from which geography and data values are taken * @param inlat : latitude of the point to search for * @param inlon : longitude of the point to search for * @param flags : GRIB_NEAREST_SAME_POINT, GRIB_NEAREST_SAME_GRID * @param outlats : returned array of latitudes of the nearest points * @param outlons : returned array of longitudes of the nearest points * @param values : returned array of data values of the nearest points * @param distances : returned array of distances from the nearest points * @param indexes : returned array of indexes of the nearest points * @param len : size of the arrays * @return 0 if OK, integer value on error */ int grib_nearest_find(grib_nearest *nearest,grib_handle* h,double inlat,double inlon, unsigned long flags,double* outlats,double* outlons, double* values,double* distances,int* indexes,size_t *len); /** * Frees an nearest from memory * * @param nearest : the nearest * @return 0 if OK, integer value on error */ int grib_nearest_delete (grib_nearest *nearest); /** * Find the nearest point of a set of points whose latitudes and longitudes * are given in the inlats, inlons arrays respectively. * If the flag is_lsm is 1 the nearest land point is returned and the * grib passed as handle (h) is considered a land sea mask. * The land nearest point is the nearest point with land sea mask value>=0.5. * If no nearest land points are found the nearest value is returned. * If the flag is_lsm is 0 the nearest point is returned. * values, distances, indexes (in the "values" array) for the nearest points (ilons,ilats) * are returned. * * @param h : handle from which geography and data values are taken * @param is_lsm : lsm flag (1-> nearest land, 0-> nearest) * @param inlats : latitudes of the points to search for * @param inlons : longitudes of the points to search for * @param npoints : number of points (size of the inlats,inlons,outlats,outlons,values,distances,indexes arrays) * @param outlats : returned array of latitudes of the nearest points * @param outlons : returned array of longitudes of the nearest points * @param values : returned array of data values of the nearest points * @param distances : returned array of distances from the nearest points * @param indexes : returned array of indexes of the nearest points * @return 0 if OK, integer value on error */ int grib_nearest_find_multiple(grib_handle* h,int is_lsm, double* inlats,double* inlons,long npoints, double* outlats,double* outlons, double* values,double* distances, int* indexes); /* @} */ /*! \defgroup get_set Accessing header and data values */ /*! @{ */ /** * Get the number offset of a key, in a message if several keys of the same name * are present, the offset of the last one is returned * * @param h : the handle to get the offset from * @param key : the key to be searched * @param offset : the address of a size_t where the offset will be set * @return 0 if OK, integer value on error */ int grib_get_offset(grib_handle* h, const char* key, size_t* offset); /** * Get the number of coded value from a key, if several keys of the same name are present, the total sum is returned * * @param h : the handle to get the offset from * @param key : the key to be searched * @param size : the address of a size_t where the size will be set * @return 0 if OK, integer value on error */ int grib_get_size(grib_handle* h, const char* key,size_t *size); /** * Get a long value from a key, if several keys of the same name are present, the last one is returned * @see grib_set_long * * @param h : the handle to get the data from * @param key : the key to be searched * @param value : the address of a long where the data will be retreived * @return 0 if OK, integer value on error */ int grib_get_long (grib_handle* h, const char* key, long* value ); /** * Get a double value from a key, if several keys of the same name are present, the last one is returned * @see grib_set_double * * @param h : the handle to get the data from * @param key : the key to be searched * @param value : the address of a double where the data will be retreived * @return 0 if OK, integer value on error */ int grib_get_double (grib_handle* h, const char* key, double* value ); /** * Get as double the i-th element of the "key" array * * @param h : the handle to get the data from * @param key : the key to be searched * @param i : zero based index * @param value : the address of a double where the data will be retreived * @return 0 if OK, integer value on error */ int grib_get_double_element(grib_handle* h, const char* key, int i, double* value ); /** * Get as double array the elements of the "key" array whose indexes are listed in the input array i * * @param h : the handle to get the data from * @param key : the key to be searched * @param i : zero based array of indexes * @param size : size of the i and value arrays * @param value : the address of a double where the data will be retreived * @return 0 if OK, integer value on error */ int grib_get_double_elements(grib_handle* h, const char* key, int* i, long size,double* value); /** * Get a string value from a key, if several keys of the same name are present, the last one is returned * @see grib_set_string * * @param h : the handle to get the data from * @param key : the key to be searched * @param mesg : the address of a string where the data will be retreived * @param length : the address of a size_t that contains allocated length of the string on input, and that contains the actual length of the string on output * @return 0 if OK, integer value on error */ int grib_get_string (grib_handle* h, const char* key, char* mesg, size_t *length ); /** * Get raw bytes values from a key. If several keys of the same name are present, the last one is returned * @see grib_set_bytes * * @param h : the handle to get the data from * @param key : the key to be searched * @param bytes : the address of a byte array where the data will be retreived * @param length : the address of a size_t that contains allocated length of the byte array on input, and that contains the actual length of the byte array on output * @return 0 if OK, integer value on error */ int grib_get_bytes (grib_handle* h, const char* key, unsigned char* bytes, size_t *length ); /** * Get double array values from a key. If several keys of the same name are present, the last one is returned * @see grib_set_double_array * * @param h : the handle to get the data from * @param key : the key to be searched * @param vals : the address of a double array where the data will be retreived * @param length : the address of a size_t that contains allocated length of the double array on input, and that contains the actual length of the double array on output * @return 0 if OK, integer value on error */ int grib_get_double_array (grib_handle* h, const char* key, double* vals, size_t *length ); /** * Get long array values from a key. If several keys of the same name are present, the last one is returned * @see grib_set_long_array * * @param h : the handle to get the data from * @param key : the key to be searched * @param vals : the address of a long array where the data will be retreived * @param length : the address of a size_t that contains allocated length of the long array on input, and that contains the actual length of the long array on output * @return 0 if OK, integer value on error */int grib_get_long_array (grib_handle* h, const char* key, long* vals, size_t *length ); /* setting data */ /** * Set a long value from a key. If several keys of the same name are present, the last one is set * @see grib_get_long * * @param h : the handle to set the data to * @param key : the key to be searched * @param val : a long where the data will be read * @return 0 if OK, integer value on error */ int grib_set_long (grib_handle* h, const char* key , long val ); /** * Set a double value from a key. If several keys of the same name are present, the last one is set * @see grib_get_double * * @param h : the handle to set the data to * @param key : the key to be searched * @param val : a double where the data will be read * @return 0 if OK, integer value on error */ int grib_set_double (grib_handle* h, const char* key , double val ); /** * Set a string value from a key. If several keys of the same name are present, the last one is set * @see grib_get_string * * @param h : the handle to set the data to * @param key : the key to be searched * @param mesg : the address of a string where the data will be read * @param length : the address of a size_t that contains the length of the string on input, and that contains the actual packed length of the string on output * @return 0 if OK, integer value on error */ int grib_set_string (grib_handle* h, const char* key , const char* mesg, size_t *length ); /** * Set a bytes array from a key. If several keys of the same name are present, the last one is set * @see grib_get_bytes * * @param h : the handle to set the data to * @param key : the key to be searched * @param bytes : the address of a byte array where the data will be read * @param length : the address of a size_t that contains the length of the byte array on input, and that contains the actual packed length of the byte array on output * @return 0 if OK, integer value on error */ int grib_set_bytes (grib_handle* h, const char* key, const unsigned char* bytes, size_t *length ); /** * Set a double array from a key. If several keys of the same name are present, the last one is set * @see grib_get_double_array * * @param h : the handle to set the data to * @param key : the key to be searched * @param vals : the address of a double array where the data will be read * @param length : a size_t that contains the length of the byte array on input * @return 0 if OK, integer value on error */ int grib_set_double_array (grib_handle* h, const char* key , const double* vals , size_t length ); /** * Set a long array from a key. If several keys of the same name are present, the last one is set * @see grib_get_long_array * * @param h : the handle to set the data to * @param key : the key to be searched * @param vals : the address of a long array where the data will be read * @param length : a size_t that contains the length of the long array on input * @return 0 if OK, integer value on error */ int grib_set_long_array (grib_handle* h, const char* key , const long* vals , size_t length ); /*! @} */ /** * Print all keys, with the context print procedure and dump mode to a resource * * @param h : the handle to be printed * @param out : output file handle * @param mode : available dump modes are: debug wmo c_code * @param option_flags : all the GRIB_DUMP_FLAG_x flags can be used * @param arg : used to provide a format to output data (experimental) */ void grib_dump_content(grib_handle* h,FILE* out,const char* mode, unsigned long option_flags,void* arg); /** * Gather all names available in a handle to a string, using a space as separator * * @param h : the handle used to gather the keys * @param names : the sting to be filled with the names */ void grib_get_all_names(grib_handle* h,char* names); /** * Print all keys from the parsed definition files available in a context * * @param f : the File used to print the keys on * @param c : the context that containd the cached definition files to be printed */ void grib_dump_action_tree(grib_context* c, FILE* f) ; /*! \defgroup context The context object The context is a long life configuration object of the grib_api. It is used to define special allocation and free routines or to set special grib_api behaviours and variables. */ /*! @{ */ /** * Grib free procedure, format of a procedure referenced in the context that is used to free memory * * @param c : the context where the memory freeing will apply * @param data : pointer to the data to be freed * must match @see grib_malloc_proc */ typedef void (*grib_free_proc) (const grib_context* c, void* data); /** * Grib malloc procedure, format of a procedure referenced in the context that is used to allocate memory * @param c : the context where the memory allocation will apply * @param length : length to be allocated in number of bytes * @return a pointer to the alocated memory, NULL if no memory can be allocated * must match @see grib_free_proc */ typedef void* (*grib_malloc_proc) (const grib_context* c, size_t length); /** * Grib realloc procedure, format of a procedure referenced in the context that is used to reallocate memory * @param c : the context where the memory allocation will apply * @param data : pointer to the data to be reallocated * @param length : length to be allocated in number of bytes * @return a pointer to the alocated memory */ typedef void* (*grib_realloc_proc) (const grib_context* c, void* data, size_t length); /** * Grib loc proc, format of a procedure referenced in the context that is used to log internal messages * * @param c : the context where the logging will apply * @param level : the log level, as defined in log modes * @param mesg : the message to be logged */ typedef void (*grib_log_proc) (const grib_context* c, int level, const char* mesg); /** * Grib print proc, format of a procedure referenced in the context that is used to print external messages * * @param c : the context where the logging will apply * @param descriptor : the structure to be printed on, must match the implementation * @param mesg : the message to be printed */ typedef void (*grib_print_proc) (const grib_context* c, void* descriptor, const char* mesg); /** * Grib data read proc, format of a procedure referenced in the context that is used to read from a stream in a resource * * @param c : the context where the read will apply * @param *ptr : the resource * @param size : size to read * @param *stream : the stream * @return size read */ typedef size_t (*grib_data_read_proc) (const grib_context* c,void *ptr, size_t size, void *stream); /** * Grib data read write, format of a procedure referenced in the context that is used to write to a stream from a resource * * @param c : the context where the write will apply * @param *ptr : the resource * @param size : size to read * @param *stream : the stream * @return size written */ typedef size_t (*grib_data_write_proc)(const grib_context* c,const void *ptr, size_t size, void *stream); /** * Grib data tell, format of a procedure referenced in the context that is used to tell the current position in a stream * * @param c : the context where the tell will apply * @param *stream : the stream * @return the position in the stream */ typedef off_t (*grib_data_tell_proc) (const grib_context* c, void *stream); /** * Grib data seek, format of a procedure referenced in the context that is used to seek the current position in a stream * * @param c : the context where the tell will apply * @param offset : the offset to seek to * @param whence : If whence is set to SEEK_SET, SEEK_CUR, or SEEK_END, the offset is relative to the start of the file, the current position indicator, or end-of-file, respectively. * @param *stream : the stream * @return 0 if OK, integer value on error */ typedef off_t (*grib_data_seek_proc) (const grib_context* c, off_t offset, int whence, void *stream); /** * Grib data eof, format of a procedure referenced in the context that is used to test end of file * * @param c : the context where the tell will apply * @param *stream : the stream * @return the position in the stream */ typedef int (*grib_data_eof_proc) (const grib_context* c, void *stream); /** * Retreive the context from a handle * * @param h : the handle used to retreive the context from * @return The handle's context, NULL it the handle is invalid */ grib_context* grib_get_context (grib_handle* h); /** * Get the static default context * * @return the default context, NULL it the context is not available */ grib_context* grib_context_get_default(void); /** * Create and allocate a new context from a parent context. * * @param c : the context to be cloned, NULL for default context * @return the new and empty context, NULL if error */ grib_context* grib_context_new (grib_context* c); /** * Frees the cached definition files of the context * * @param c : the context to be deleted */ void grib_context_delete (grib_context* c); /** * Set the gts header mode on. * The GTS headers will be preserved. * * @param c : the context to be deleted */ void grib_gts_header_on(grib_context* c) ; /** * Set the gts header mode off. * The GTS headers will be deleted. * * @param c : the context to be deleted */ void grib_gts_header_off(grib_context* c); /** * Set the gribex mode on. * Grib files will be compatible with gribex. * * @param c : the context to be deleted */ void grib_gribex_mode_on(grib_context* c); /** * Set the gribex mode off. * Grib files won't be always compatible with gribex. * * @param c : the context to be deleted */ void grib_gribex_mode_off(grib_context* c); /** * Sets user data in a context * * @param c : the context to be modified * @param udata : the user data to set */ void grib_context_set_user_data (grib_context* c, void* udata); /** * get userData from a context * * @param c : the context from which the user data will be retreived * @return the user data referenced in the context */ void* grib_context_get_user_data (grib_context* c); /** * Sets memory procedures of the context * * @param c : the context to be modified * @param griballoc : the memory allocation procedure to be set @see grib_malloc_proc * @param gribfree : the memory freeing procedure to be set @see grib_free_proc */ void grib_context_set_memory_proc(grib_context* c, grib_malloc_proc griballoc, grib_free_proc gribfree, grib_realloc_proc gribrealloc); /** * Sets memory procedures of the context for persistent data * * @param c : the context to be modified * @param griballoc : the memory allocation procedure to be set @see grib_malloc_proc * @param gribfree : the memory freeing procedure to be set @see grib_free_proc */ void grib_context_set_persistent_memory_proc(grib_context* c, grib_malloc_proc griballoc, grib_free_proc gribfree); /** * Sets memory procedures of the context for large buffers * * @param c : the context to be modified * @param griballoc : the memory allocation procedure to be set @see grib_malloc_proc * @param gribfree : the memory freeing procedure to be set @see grib_free_proc */ void grib_context_set_buffer_memory_proc(grib_context* c, grib_malloc_proc griballoc, grib_free_proc gribfree, grib_realloc_proc gribrealloc); /** * Sets the context search path for definition files * * @param c : the context to be modified * @param path : the search path to be set */ void grib_context_set_path(grib_context* c, const char* path); /** * Sets context dump mode * * @param c : the context to be modified * @param mode : the log mode to be set */ void grib_context_set_dump_mode(grib_context* c, int mode); /** * Sets the context printing procedure used for user interaction * * @param c : the context to be modified * @param printp : the printing procedure to be set @see grib_print_proc */ void grib_context_set_print_proc(grib_context* c, grib_print_proc printp); /** * Sets the context logging procedure used for system (warning, errors, infos ...) messages * * @param c : the context to be modified * @param logp : the logging procedure to be set @see grib_log_proc */ void grib_context_set_logging_proc(grib_context* c, grib_log_proc logp); /** * Turn on support for multiple fields in single grib messages * * @param c : the context to be modified */ void grib_multi_support_on(grib_context* c); /** * Turn off support for multiple fields in single grib messages * * @param c : the context to be modified */ void grib_multi_support_off(grib_context* c); /*! @} */ /** * Get the api version * * @return api version */ long grib_get_api_version(void); /** * Prints the api version * * */ void grib_print_api_version(FILE* out); /*! \defgroup keys_iterator Iterating on keys names The keys iterator is designed to get the key names defined in a message. Key names on which the iteration is carried out can be filtered through their attributes or by the namespace they belong to. */ /*! @{ */ /*! Create a new iterator from a valid and initialized handle. * @param h : the handle whose keys you want to iterate * @param filter_flags : flags to filter out some of the keys through their attributes * @param name_space : if not null the iteration is carried out only on * keys belongin to the namespace passed. (NULL for all the keys) * @return keys iterator ready to iterate through keys according to filter_flags * and namespace */ grib_keys_iterator* grib_keys_iterator_new(grib_handle* h,unsigned long filter_flags, char* name_space); /*! Step to the next iterator. * @param kiter : valid grib_keys_iterator * @return 1 if next iterator exitsts, 0 if no more elements to iterate on */ int grib_keys_iterator_next(grib_keys_iterator *kiter); /*! get the key name from the iterator * @param kiter : valid grib_keys_iterator * @return key name */ const char* grib_keys_iterator_get_name(grib_keys_iterator *kiter); /*! Delete the iterator. * @param kiter : valid grib_keys_iterator * @return 0 if OK, integer value on error */ int grib_keys_iterator_delete( grib_keys_iterator* kiter); /*! Rewind the iterator. * @param kiter : valid grib_keys_iterator * @return 0 if OK, integer value on error */ int grib_keys_iterator_rewind(grib_keys_iterator* kiter); int grib_keys_iterator_set_flags(grib_keys_iterator *kiter,unsigned long flags); /* @} */ void grib_update_sections_lengths(grib_handle* h); /** * Convert an error code into a string * @param code : the error code * @return the error message */ const char* grib_get_error_message(int code); const char* grib_get_type_name(int type); int grib_get_native_type(grib_handle* h, const char* name,int* type); void grib_check(const char* call,const char* file,int line,int e,const char* msg); #define GRIB_CHECK(a,msg) grib_check(#a,__FILE__,__LINE__,a,msg) int grib_set_values(grib_handle* h,grib_values* grib_values , size_t arg_count); grib_handle* grib_handle_new_from_partial_message_copy(grib_context* c, const void* data, size_t size); grib_handle* grib_handle_new_from_partial_message(grib_context* c,void* data, size_t buflen); int grib_is_missing(grib_handle* h, const char* key, int* err); int grib_set_missing(grib_handle* h, const char* key); int grib_get_gaussian_latitudes(long truncation,double* latitudes); int grib_julian_to_datetime(double jd, long *year, long *month, long *day, long *hour, long *minute, long *second); int grib_datetime_to_julian(long year, long month, long day, long hour, long minute, long second, double *jd); long grib_julian_to_date(long jdate); long grib_date_to_julian(long ddate); #ifdef __cplusplus } #endif #endif /* This part is automatically generated by ./errors.pl, do not edit */ #ifndef grib_errors_H #define grib_errors_H /** No error */ #define GRIB_SUCCESS 0 /** End of ressource reached */ #define GRIB_END_OF_FILE -1 /** Internal error */ #define GRIB_INTERNAL_ERROR -2 /** Passed buffer is too small */ #define GRIB_BUFFER_TOO_SMALL -3 /** Function not yet implemented */ #define GRIB_NOT_IMPLEMENTED -4 /** Missing 7777 at end of message */ #define GRIB_7777_NOT_FOUND -5 /** Passed array is too small */ #define GRIB_ARRAY_TOO_SMALL -6 /** File not found */ #define GRIB_FILE_NOT_FOUND -7 /** Code not found in code table */ #define GRIB_CODE_NOT_FOUND_IN_TABLE -8 /** Code cannot unpack because of string too small */ #define GRIB_STRING_TOO_SMALL_FOR_CODE_NAME -9 /** Array size mismatch */ #define GRIB_WRONG_ARRAY_SIZE -10 /** Key/value not found */ #define GRIB_NOT_FOUND -11 /** Input output problem */ #define GRIB_IO_PROBLEM -12 /** Message invalid */ #define GRIB_INVALID_MESSAGE -13 /** Decoding invalid */ #define GRIB_DECODING_ERROR -14 /** Encoding invalid */ #define GRIB_ENCODING_ERROR -15 /** Code cannot unpack because of string too small */ #define GRIB_NO_MORE_IN_SET -16 /** Problem with calculation of geographic attributes */ #define GRIB_GEOCALCULUS_PROBLEM -17 /** Out of memory */ #define GRIB_OUT_OF_MEMORY -18 /** Value is read only */ #define GRIB_READ_ONLY -19 /** Invalid argument */ #define GRIB_INVALID_ARGUMENT -20 /** Null handle */ #define GRIB_NULL_HANDLE -21 /** Invalid section number */ #define GRIB_INVALID_SECTION_NUMBER -22 /** Value cannot be missing */ #define GRIB_VALUE_CANNOT_BE_MISSING -23 /** Wrong message length */ #define GRIB_WRONG_LENGTH -24 /** Invalid key type */ #define GRIB_INVALID_TYPE -25 /** Unable to set step */ #define GRIB_WRONG_STEP -26 /** Wrong units for step (step must be integer) */ #define GRIB_WRONG_STEP_UNIT -27 /** Invalid file id */ #define GRIB_INVALID_FILE -28 /** Invalid grib id */ #define GRIB_INVALID_GRIB -29 /** Invalid index id */ #define GRIB_INVALID_INDEX -30 /** Invalid iterator id */ #define GRIB_INVALID_ITERATOR -31 /** Invalid keys iterator id */ #define GRIB_INVALID_KEYS_ITERATOR -32 /** Invalid nearest id */ #define GRIB_INVALID_NEAREST -33 /** Invalid order by */ #define GRIB_INVALID_ORDERBY -34 /** Missing a key from the fieldset */ #define GRIB_MISSING_KEY -35 /** The point is out of the grid area */ #define GRIB_OUT_OF_AREA -36 /** Concept no match */ #define GRIB_CONCEPT_NO_MATCH -37 /** Definitions files not found */ #define GRIB_NO_DEFINITIONS -38 /** Wrong type while packing */ #define GRIB_WRONG_TYPE -39 /** End of resource */ #define GRIB_END -40 /** Unable to code a field without values */ #define GRIB_NO_VALUES -41 /** Grid description is wrong or inconsistent */ #define GRIB_WRONG_GRID -42 /** End of index reached */ #define GRIB_END_OF_INDEX -43 #endif