store: Added support for ALL matchers.

[sysdb.git] / src / include / core / data.h

diff --git a/src/include/core/data.h b/src/include/core/data.h
index c8c7482e796f4438aeafdb8eebe4588223636e7b..9ab5cdabf50936d33f5a494a64456bad3502c6c9 100644 (file)
--- a/src/include/core/data.h
+++ b/src/include/core/data.h
@@ -48,6 +48,9 @@ enum {
        SDB_TYPE_DATETIME,
        SDB_TYPE_BINARY,
        SDB_TYPE_REGEX, /* extended, case-insensitive POSIX regex */
+
+       /* flags: */
+       SDB_TYPE_ARRAY = 1 << 8,
 };
 
 #define SDB_TYPE_TO_STRING(t) \
@@ -58,26 +61,36 @@ enum {
                : ((t) == SDB_TYPE_BINARY) ? "BINARY" \
                : ((t) == SDB_TYPE_REGEX) ? "REGEX" : "UNKNOWN")
 
+union sdb_datum;
+typedef union sdb_datum sdb_datum_t;
+
+union sdb_datum {
+       int64_t     integer;  /* SDB_TYPE_INTEGER */
+       double      decimal;  /* SDB_TYPE_DECIMAL */
+       char       *string;   /* SDB_TYPE_STRING  */
+       sdb_time_t  datetime; /* SDB_TYPE_DATETIME */
+       struct {
+               size_t length;
+               unsigned char *datum;
+       } binary;             /* SDB_TYPE_BINARY */
+       struct {
+               char *raw;
+               regex_t regex;
+       } re;                 /* SDB_TYPE_REGEX */
+
+       struct {
+               size_t length;
+               void *values;
+       } array;
+};
+
 /*
  * sdb_data_t:
- * A datum retrieved from an arbitrary data source.
+ * An arbitrary value of a specified type.
  */
 typedef struct {
-       int type;
-       union {
-               int64_t     integer;  /* SDB_TYPE_INTEGER */
-               double      decimal;  /* SDB_TYPE_DECIMAL */
-               char       *string;   /* SDB_TYPE_STRING  */
-               sdb_time_t  datetime; /* SDB_TYPE_DATETIME */
-               struct {
-                       size_t length;
-                       unsigned char *datum;
-               } binary;             /* SDB_TYPE_BINARY */
-               struct {
-                       char *raw;
-                       regex_t regex;
-               } re;                 /* SDB_TYPE_REGEX */
-       } data;
+       int type;  /* type of the datum */
+       sdb_datum_t data;
 } sdb_data_t;
 #define SDB_DATA_INIT { SDB_TYPE_NULL, { .integer = 0 } }
 
@@ -144,6 +157,15 @@ sdb_data_strcmp(const sdb_data_t *d1, const sdb_data_t *d2);
 _Bool
 sdb_data_isnull(const sdb_data_t *datum);
 
+/*
+ * sdb_data_inarray:
+ * Determine whether a datum is included in an array based on the usual
+ * comparison function of the value's type. The element type of the array has
+ * to match the type of the value.
+ */
+_Bool
+sdb_data_inarray(const sdb_data_t *value, const sdb_data_t *array);
+
 /*
  * Operators supported by sdb_data_eval_expr.
  */
@@ -198,6 +220,23 @@ int
 sdb_data_expr_eval(int op, const sdb_data_t *d1, const sdb_data_t *d2,
                sdb_data_t *res);
 
+/*
+ * sdb_data_expr_type:
+ * Determine the type of the expression when applying the specified operator
+ * to the specified types. Note that if an actual value is a typed NULL value
+ * (e.g. a NULL string value), the return value of this function does not
+ * match the return type of sdb_data_expr_eval.
+ *
+ * See the documentation of sdb_data_expr_eval() for a description of which
+ * operations are supported.
+ *
+ * Returns:
+ *  - the type id on success
+ *  - a negative value else
+ */
+int
+sdb_data_expr_type(int op, int type1, int type2);
+
 /*
  * sdb_data_strlen:
  * Returns a (worst-case) estimate for the number of bytes required to format