X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=src%2Finclude%2Fcore%2Fstore.h;h=b82ae2e9134cb41ca1f4cdb4b77626c454ab0cff;hb=914a0b5636a32a97c50f73e14ac7be16b2686860;hp=9304acfa79e1f7761928a76dad17e161d02db09f;hpb=f257d14eeca9e263e561f2f597b31bd9b0f4e931;p=sysdb.git diff --git a/src/include/core/store.h b/src/include/core/store.h index 9304acf..b82ae2e 100644 --- a/src/include/core/store.h +++ b/src/include/core/store.h @@ -320,7 +320,8 @@ sdb_store_expr_fieldvalue(int field); /* * sdb_store_expr_attrvalue: * Creates an expression which evaluates to the value of the specified - * attribute of a stored object. + * attribute of a stored object. Evaluates to a NULL value if the attribute + * does not exist. * * Returns: * - an expression object on success @@ -358,58 +359,18 @@ sdb_store_expr_eval(sdb_store_expr_t *expr, sdb_store_obj_t *obj, sdb_data_t *res, sdb_store_matcher_t *filter); /* - * Conditionals may be used to lookup hosts from the store based on a - * conditional expression. - * - * A conditional object inherits from sdb_object_t and, thus, may safely be - * cast to a generic object. - */ -struct sdb_store_cond; -typedef struct sdb_store_cond sdb_store_cond_t; -#define SDB_STORE_COND(obj) ((sdb_store_cond_t *)(obj)) - -/* - * sdb_store_attr_cond: - * Creates a conditional based on attribute values. The value of stored - * attributes is compared against the value the expression evaluates to. See - * sdb_data_cmp for details about the comparison. - */ -sdb_store_cond_t * -sdb_store_attr_cond(const char *name, sdb_store_expr_t *expr); - -/* - * sdb_store_obj_cond: - * Creates a conditional based on queryable object fields. The respective - * field of *any* object type is compared against the value the expression - * evaluates to. - */ -sdb_store_cond_t * -sdb_store_obj_cond(int field, sdb_store_expr_t *expr); - -/* - * sdb_store_name_matcher: - * Creates a matcher matching by the specified object type's name. If 're' is - * true, the specified name is treated as a POSIX extended regular expression. - * Else, the exact name has to match (case-insensitive). + * sdb_store_isnull_matcher: + * Creates a matcher matching NULL values. */ sdb_store_matcher_t * -sdb_store_name_matcher(int type, const char *name, _Bool re); +sdb_store_isnull_matcher(sdb_store_expr_t *expr); /* - * sdb_store_attr_matcher: - * Creates a matcher matching attributes based on their value. If 're' is - * true, the specified name is treated as a POSIX extended regular expression. - * Else, the exact name has to match (case-insensitive). + * sdb_store_isnnull_matcher: + * Creates a matcher matching non-NULL values. */ sdb_store_matcher_t * -sdb_store_attr_matcher(const char *name, const char *value, _Bool re); - -/* - * sdb_store_isnull_matcher: - * Creates a matcher matching "missing" attributes. - */ -sdb_store_matcher_t * -sdb_store_isnull_matcher(const char *attr_name); +sdb_store_isnnull_matcher(sdb_store_expr_t *expr); /* * sdb_store_child_matcher: @@ -422,79 +383,103 @@ sdb_store_child_matcher(int type, sdb_store_matcher_t *m); /* * sdb_store_lt_matcher, sdb_store_le_matcher, sdb_store_eq_matcher, * sdb_store_ge_matcher, sdb_store_gt_matcher: - * Creates a matcher based on a conditional. The matcher matches objects for - * which the conditional evaluates the object to compare less than, less or - * equal, equal, greater or equal, or greater than the conditional's value - * repsectively. + * Create conditional matchers comparing the values of two expressions. The + * matcher matches if the left expression compres less than, less or equal + * than, equal to, not equal to, greater or equal than, or greater than the + * right expression. */ sdb_store_matcher_t * -sdb_store_lt_matcher(sdb_store_cond_t *cond); -sdb_store_matcher_t * -sdb_store_le_matcher(sdb_store_cond_t *cond); +sdb_store_lt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); sdb_store_matcher_t * -sdb_store_eq_matcher(sdb_store_cond_t *cond); +sdb_store_le_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); sdb_store_matcher_t * -sdb_store_ge_matcher(sdb_store_cond_t *cond); +sdb_store_eq_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); sdb_store_matcher_t * -sdb_store_gt_matcher(sdb_store_cond_t *cond); - +sdb_store_ne_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); sdb_store_matcher_t * -sdb_store_cmp_lt(sdb_store_expr_t *left, sdb_store_expr_t *right); +sdb_store_ge_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); sdb_store_matcher_t * -sdb_store_cmp_le(sdb_store_expr_t *left, sdb_store_expr_t *right); +sdb_store_gt_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); + +/* + * sdb_store_in_matcher: + * Creates a matcher which matches if the right value evaluates to an array + * value and the left value is included in that array. See sdb_data_inarray + * for more details. + */ sdb_store_matcher_t * -sdb_store_cmp_eq(sdb_store_expr_t *left, sdb_store_expr_t *right); +sdb_store_in_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); + +/* + * sdb_store_regex_matcher: + * Creates a matcher which matches the string value the left expression + * evaluates to against the regular expression the right expression evaluates + * to. The right expression may either be a constant value regular expression + * or string or a dynamic value evaluating to a string. In the latter case, + * the string is compiled to a regex every time the matcher is executed. + */ sdb_store_matcher_t * -sdb_store_cmp_ge(sdb_store_expr_t *left, sdb_store_expr_t *right); +sdb_store_regex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); + +/* + * sdb_store_nregex_matcher: + * Creates a regex matcher just like sdb_store_regex_matcher except that it + * matches in case the regular expression does not match. + */ sdb_store_matcher_t * -sdb_store_cmp_gt(sdb_store_expr_t *left, sdb_store_expr_t *right); +sdb_store_nregex_matcher(sdb_store_expr_t *left, sdb_store_expr_t *right); /* - * sdb_store_parse_object_type_plural: - * Parse the type name (plural) of a stored object. + * sdb_store_matcher_op_cb: + * Callback constructing a matcher operator. + */ +typedef sdb_store_matcher_t *(*sdb_store_matcher_op_cb) + (sdb_store_expr_t *, sdb_store_expr_t *); + +/* + * sdb_store_parse_matcher_op: + * Parse a matcher operator and return a constructor for the respective + * matcher. * * Returns: - * - the object type on success - * - a negative value else + * - matcher operator constructor on success + * - NULL else */ -int -sdb_store_parse_object_type_plural(const char *name); +sdb_store_matcher_op_cb +sdb_store_parse_matcher_op(const char *op); /* - * sdb_store_parse_field_name: - * Parse the name of a stored object's queryable field. + * sdb_store_parse_object_type: + * Parse the type name of a stored object. * * Returns: - * - the field id on success + * - the object type on success * - a negative value else */ int -sdb_store_parse_field_name(const char *name); +sdb_store_parse_object_type(const char *name); /* - * sdb_store_matcher_parse_cmp: - * Parse a simple compare expression (. ). + * sdb_store_parse_object_type_plural: + * Parse the type name (plural) of a stored object. * * Returns: - * - a matcher object on success - * - NULL else + * - the object type on success + * - a negative value else */ -sdb_store_matcher_t * -sdb_store_matcher_parse_cmp(const char *obj_type, const char *attr, - const char *op, sdb_store_expr_t *expr); +int +sdb_store_parse_object_type_plural(const char *name); /* - * sdb_store_matcher_parse_field_cmp: - * Parse a simple compare expression for queryable object fields ( - * ). + * sdb_store_parse_field_name: + * Parse the name of a stored object's queryable field. * * Returns: - * - a matcher object on success - * - NULL else + * - the field id on success + * - a negative value else */ -sdb_store_matcher_t * -sdb_store_matcher_parse_field_cmp(const char *name, const char *op, - sdb_store_expr_t *expr); +int +sdb_store_parse_field_name(const char *name); /* * sdb_store_dis_matcher: @@ -536,14 +521,6 @@ int sdb_store_matcher_matches(sdb_store_matcher_t *m, sdb_store_obj_t *obj, sdb_store_matcher_t *filter); -/* - * sdb_store_matcher_tostring: - * Format a matcher object as string. This is meant for logging or debugging - * purposes. - */ -char * -sdb_store_matcher_tostring(sdb_store_matcher_t *m, char *buf, size_t buflen); - /* * sdb_store_lookup_cb: * Lookup callback. It is called for each matching object when looking up data