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85 lines
2.9 KiB
85 lines
2.9 KiB
4 years ago
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/*****
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* Abstract:
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*
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* The internal structures that represent an attribute list. This is made
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* available for slpd to speed its access to values for predicate evaluation.
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****/
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/******************************************************************************
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*
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* Individual values
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*
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* What is a value?
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*
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* In SLP an individual attribute can be associated with a list of values. A
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* value is the data associated with a tag. Depending on the type of
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* attribute, there can be zero, one, or many values associated with a single
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* tag.
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*****************************************************************************/
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typedef struct xx_value_t
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{
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struct xx_value_t *next;
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int escaped_len;
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int unescaped_len;
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union
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{
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SLPBoolean va_bool;
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int va_int;
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char *va_str; /* This is used for keyword, string, and opaque. */
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} data; /* Stores the value of the variable. Note, any string must be copied into the struct. */
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/* Memory handling */
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struct xx_value_t *next_chunk; /* The next chunk of allocated memory in the value list. */
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struct xx_value_t *last_value_in_chunk; /* The last value in the chunk. Only set by the chunk head. */
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} value_t;
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/******************************************************************************
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*
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* Individual attributes (vars)
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*
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* What is a var?
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*
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* A var is a variable tag that is associated with a list of values. Zero or
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* more vars are kept in a single SLPAttributes object. Each value stored in
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* a var is kept in a value struct.
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*****************************************************************************/
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/* An individual attribute in the struct. */
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typedef struct xx_var_t
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{
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struct xx_var_t *next; /* Pointer to the next variable. */
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SLPType type; /* The type of this variable. */
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const char *tag; /* The name of this variable. */
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unsigned int tag_len; /* The length of the tag. */
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value_t *list; /* The list of values. */
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int list_size; /* The number of values in the list. */
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SLPBoolean modified; /* Flag. Set to be true if the attribute should be included in the next freshen. */
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} var_t;
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/******************************************************************************
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*
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* All the attributes.
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*
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*****************************************************************************/
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/* The opaque struct representing a SLPAttributes handle.
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*/
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struct xx_SLPAttributes
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{
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SLPBoolean strict; /* Are we using strict typing? */
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char *lang; /* Language. */
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var_t *attrs; /* List of vars to be sent. */
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int attr_count; /* The number of attributes */
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};
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/* Finds a variable by its tag. */
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var_t *attr_val_find_str(struct xx_SLPAttributes *slp_attr, const char *tag, int tag_len);
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/* Finds the type of an attribute. */
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SLPError SLPAttrGetType_len(SLPAttributes attr_h, const char *tag, int tag_len, SLPType *type);
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