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## Module xmlautomata from libxml2

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the API to build regexp automata

## Table of Contents

    Structure xmlAutomata
    struct _xmlAutomata
    The content of this structure is not made public by the API.

    Typedef xmlAutomata * xmlAutomataPtr

    Structure xmlAutomataState
    struct _xmlAutomataState
    The content of this structure is not made public by the API.

    Typedef xmlAutomataState * xmlAutomataStatePtr

    xmlRegexpPtr	xmlAutomataCompile	(xmlAutomataPtr am)

    xmlAutomataStatePtr	xmlAutomataGetInitState	(xmlAutomataPtr am)

    int	xmlAutomataIsDeterminist	(xmlAutomataPtr am)

    xmlAutomataStatePtr	xmlAutomataNewAllTrans	(xmlAutomataPtr am,
    						 xmlAutomataStatePtr from,
    						 xmlAutomataStatePtr to,
    						 int lax)

    xmlAutomataStatePtr	xmlAutomataNewCountTrans	(xmlAutomataPtr am,
    							 xmlAutomataStatePtr from,
    							 xmlAutomataStatePtr to,
    							 const xmlChar * token,
    							 int min,
    							 int max,
    							 void * data)

    xmlAutomataStatePtr	xmlAutomataNewCountedTrans	(xmlAutomataPtr am,
    							 xmlAutomataStatePtr from,
    							 xmlAutomataStatePtr to,
    							 int counter)

    int	xmlAutomataNewCounter		(xmlAutomataPtr am,
    					 int min,
    					 int max)

    xmlAutomataStatePtr	xmlAutomataNewCounterTrans	(xmlAutomataPtr am,
    							 xmlAutomataStatePtr from,
    							 xmlAutomataStatePtr to,
    							 int counter)

    xmlAutomataStatePtr	xmlAutomataNewEpsilon	(xmlAutomataPtr am,
    						 xmlAutomataStatePtr from,
    						 xmlAutomataStatePtr to)

    xmlAutomataStatePtr	xmlAutomataNewOnceTrans	(xmlAutomataPtr am,
    						 xmlAutomataStatePtr from,
    						 xmlAutomataStatePtr to,
    						 const xmlChar * token,
    						 int min,
    						 int max,
    						 void * data)

    xmlAutomataStatePtr	xmlAutomataNewState	(xmlAutomataPtr am)

    xmlAutomataStatePtr	xmlAutomataNewTransition	(xmlAutomataPtr am,
    							 xmlAutomataStatePtr from,
    							 xmlAutomataStatePtr to,
    							 const xmlChar * token,
    							 void * data)

    xmlAutomataStatePtr	xmlAutomataNewTransition2	(xmlAutomataPtr am,
    							 xmlAutomataStatePtr from,
    							 xmlAutomataStatePtr to,
    							 const xmlChar * token,
    							 const xmlChar * token2,
    							 void * data)

    int	xmlAutomataSetFinalState	(xmlAutomataPtr am,
    					 xmlAutomataStatePtr state)

    void	xmlFreeAutomata			(xmlAutomataPtr am)

    xmlAutomataPtr	xmlNewAutomata		(void)

## Description

### Structure xmlAutomata

    Structure xmlAutomata
    struct _xmlAutomata {
    The content of this structure is not made public by the API.
    }

### Structure xmlAutomataState

    Structure xmlAutomataState
    struct _xmlAutomataState {
    The content of this structure is not made public by the API.
    }

### Function: xmlAutomataCompile

    xmlRegexpPtr	xmlAutomataCompile	(xmlAutomataPtr am)

Compile the automata into a Reg Exp ready for being executed. The automata should be free after this point.

`am`: | an automata
`Returns`: | the compiled regexp or NULL in case of error

### Function: xmlAutomataGetInitState

    xmlAutomataStatePtr	xmlAutomataGetInitState	(xmlAutomataPtr am)

Initial state lookup

`am`: | an automata
`Returns`: | the initial state of the automata

### Function: xmlAutomataIsDeterminist

    int	xmlAutomataIsDeterminist	(xmlAutomataPtr am)

Checks if an automata is determinist.

`am`: | an automata
`Returns`: | 1 if true, 0 if not, and -1 in case of error

### Function: xmlAutomataNewAllTrans

    xmlAutomataStatePtr	xmlAutomataNewAllTrans	(xmlAutomataPtr am,
    						 xmlAutomataStatePtr from,
    						 xmlAutomataStatePtr to,
    						 int lax)

If @to is NULL, this creates first a new target state in the automata and then adds a an ALL transition from the @from state to the target state. That transition is an epsilon transition allowed only when all transitions from the @from node have been activated.

`am`: | an automata
`from`: | the starting point of the transition
`to`: | the target point of the transition or NULL
`lax`: | allow to transition if not all all transitions have been activated
`Returns`: | the target state or NULL in case of error

### Function: xmlAutomataNewCountTrans

    xmlAutomataStatePtr	xmlAutomataNewCountTrans	(xmlAutomataPtr am,
    							 xmlAutomataStatePtr from,
    							 xmlAutomataStatePtr to,
    							 const xmlChar * token,
    							 int min,
    							 int max,
    							 void * data)

If @to is NULL, this creates first a new target state in the automata and then adds a transition from the @from state to the target state activated by a succession of input of value @token and whose number is between @min and @max

`am`: | an automata
`from`: | the starting point of the transition
`to`: | the target point of the transition or NULL
`token`: | the input string associated to that transition
`min`: | the minimum successive occurences of token
`max`: | the maximum successive occurences of token
`data`: | data associated to the transition
`Returns`: | the target state or NULL in case of error

### Function: xmlAutomataNewCountedTrans

    xmlAutomataStatePtr	xmlAutomataNewCountedTrans	(xmlAutomataPtr am,
    							 xmlAutomataStatePtr from,
    							 xmlAutomataStatePtr to,
    							 int counter)

If @to is NULL, this creates first a new target state in the automata and then adds an epsilon transition from the @from state to the target state which will increment the counter provided

`am`: | an automata
`from`: | the starting point of the transition
`to`: | the target point of the transition or NULL
`counter`: | the counter associated to that transition
`Returns`: | the target state or NULL in case of error

### Function: xmlAutomataNewCounter

    int	xmlAutomataNewCounter		(xmlAutomataPtr am,
    					 int min,
    					 int max)

Create a new counter

`am`: | an automata
`min`: | the minimal value on the counter
`max`: | the maximal value on the counter
`Returns`: | the counter number or -1 in case of error

### Function: xmlAutomataNewCounterTrans

    xmlAutomataStatePtr	xmlAutomataNewCounterTrans	(xmlAutomataPtr am,
    							 xmlAutomataStatePtr from,
    							 xmlAutomataStatePtr to,
    							 int counter)

If @to is NULL, this creates first a new target state in the automata and then adds an epsilon transition from the @from state to the target state which will be allowed only if the counter is within the right range.

`am`: | an automata
`from`: | the starting point of the transition
`to`: | the target point of the transition or NULL
`counter`: | the counter associated to that transition
`Returns`: | the target state or NULL in case of error

### Function: xmlAutomataNewEpsilon

    xmlAutomataStatePtr	xmlAutomataNewEpsilon	(xmlAutomataPtr am,
    						 xmlAutomataStatePtr from,
    						 xmlAutomataStatePtr to)

If @to is NULL, this creates first a new target state in the automata and then adds an epsilon transition from the @from state to the target state

`am`: | an automata
`from`: | the starting point of the transition
`to`: | the target point of the transition or NULL
`Returns`: | the target state or NULL in case of error

### Function: xmlAutomataNewOnceTrans

    xmlAutomataStatePtr	xmlAutomataNewOnceTrans	(xmlAutomataPtr am,
    						 xmlAutomataStatePtr from,
    						 xmlAutomataStatePtr to,
    						 const xmlChar * token,
    						 int min,
    						 int max,
    						 void * data)

If @to is NULL, this creates first a new target state in the automata and then adds a transition from the @from state to the target state activated by a succession of input of value @token and whose number is between @min and @max, moreover that transition can only be crossed once.

`am`: | an automata
`from`: | the starting point of the transition
`to`: | the target point of the transition or NULL
`token`: | the input string associated to that transition
`min`: | the minimum successive occurences of token
`max`: | the maximum successive occurences of token
`data`: | data associated to the transition
`Returns`: | the target state or NULL in case of error

### Function: xmlAutomataNewState

    xmlAutomataStatePtr	xmlAutomataNewState	(xmlAutomataPtr am)

Create a new disconnected state in the automata

`am`: | an automata
`Returns`: | the new state or NULL in case of error

### Function: xmlAutomataNewTransition

    xmlAutomataStatePtr	xmlAutomataNewTransition	(xmlAutomataPtr am,
    							 xmlAutomataStatePtr from,
    							 xmlAutomataStatePtr to,
    							 const xmlChar * token,
    							 void * data)

If @to is NULL, this creates first a new target state in the automata and then adds a transition from the @from state to the target state activated by the value of @token

`am`: | an automata
`from`: | the starting point of the transition
`to`: | the target point of the transition or NULL
`token`: | the input string associated to that transition
`data`: | data passed to the callback function if the transition is activated
`Returns`: | the target state or NULL in case of error

### Function: xmlAutomataNewTransition2

    xmlAutomataStatePtr	xmlAutomataNewTransition2	(xmlAutomataPtr am,
    							 xmlAutomataStatePtr from,
    							 xmlAutomataStatePtr to,
    							 const xmlChar * token,
    							 const xmlChar * token2,
    							 void * data)

If @to is NULL, this creates first a new target state in the automata and then adds a transition from the @from state to the target state activated by the value of @token

`am`: | an automata
`from`: | the starting point of the transition
`to`: | the target point of the transition or NULL
`token`: | the first input string associated to that transition
`token2`: | the second input string associated to that transition
`data`: | data passed to the callback function if the transition is activated
`Returns`: | the target state or NULL in case of error

### Function: xmlAutomataSetFinalState

    int	xmlAutomataSetFinalState	(xmlAutomataPtr am,
    					 xmlAutomataStatePtr state)

Makes that state a final state

`am`: | an automata
`state`: | a state in this automata
`Returns`: | 0 or -1 in case of error

### Function: xmlFreeAutomata

    void	xmlFreeAutomata			(xmlAutomataPtr am)

Free an automata

`am`: | an automata

### Function: xmlNewAutomata

    xmlAutomataPtr	xmlNewAutomata		(void)

Create a new automata

`Returns`: | the new object or NULL in case of failure

Daniel Veillard