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Module xmlregexp from libxml2

deps/src/libxml2-2.9.1/doc/html/libxml-xmlregexp.html

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Module xmlregexp from libxml2

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| | xmlreader | | API documentation | | The XML C parser and toolkit of Gnome | xmlsave | |

basic API for libxml regular expressions handling used for XML Schemas and validation.

Table of Contents

Structure[xmlExpCtxt](#xmlExpCtxt)
struct _xmlExpCtxt
The content of this structure is not made public by the API.
Typedef[xmlExpCtxt](libxml-xmlregexp.html#xmlExpCtxt)*xmlExpCtxtPtr
Structure[xmlExpNode](#xmlExpNode)
struct _xmlExpNode
The content of this structure is not made public by the API.
Typedef[xmlExpNode](libxml-xmlregexp.html#xmlExpNode)*xmlExpNodePtr
Enum[xmlExpNodeType](#xmlExpNodeType)
Structure[xmlRegExecCtxt](#xmlRegExecCtxt)
struct _xmlRegExecCtxt
The content of this structure is not made public by the API.
Typedef[xmlRegExecCtxt](libxml-xmlregexp.html#xmlRegExecCtxt)*xmlRegExecCtxtPtr
Structure[xmlRegexp](#xmlRegexp)
struct _xmlRegexp
The content of this structure is not made public by the API.
Typedef[xmlRegexp](libxml-xmlregexp.html#xmlRegexp)*xmlRegexpPtr
int[xmlExpCtxtNbCons](#xmlExpCtxtNbCons)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt)
int[xmlExpCtxtNbNodes](#xmlExpCtxtNbNodes)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt)
void[xmlExpDump](#xmlExpDump)([xmlBufferPtr](libxml-tree.html#xmlBufferPtr)buf,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)expr)
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)[xmlExpExpDerive](#xmlExpExpDerive)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)sub)
void[xmlExpFree](#xmlExpFree)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp)
void[xmlExpFreeCtxt](#xmlExpFreeCtxt)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt)
int[xmlExpGetLanguage](#xmlExpGetLanguage)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp,
const[xmlChar](libxml-xmlstring.html#xmlChar)** langList,
int len)
int[xmlExpGetStart](#xmlExpGetStart)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp,
const[xmlChar](libxml-xmlstring.html#xmlChar)** tokList,
int len)
int[xmlExpIsNillable](#xmlExpIsNillable)([xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp)
int[xmlExpMaxToken](#xmlExpMaxToken)([xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)expr)
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)[xmlExpNewAtom](#xmlExpNewAtom)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
const[xmlChar](libxml-xmlstring.html#xmlChar)* name,
int len)
[xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)[xmlExpNewCtxt](#xmlExpNewCtxt)(int maxNodes,
[xmlDictPtr](libxml-dict.html#xmlDictPtr)dict)
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)[xmlExpNewOr](#xmlExpNewOr)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)left,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)right)
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)[xmlExpNewRange](#xmlExpNewRange)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)subset,
int min,
int max)
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)[xmlExpNewSeq](#xmlExpNewSeq)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)left,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)right)
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)[xmlExpParse](#xmlExpParse)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
const char * expr)
void[xmlExpRef](#xmlExpRef)([xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp)
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)[xmlExpStringDerive](#xmlExpStringDerive)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp,
const[xmlChar](libxml-xmlstring.html#xmlChar)* str,
int len)
int[xmlExpSubsume](#xmlExpSubsume)([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)sub)
Function type:[xmlRegExecCallbacks](#xmlRegExecCallbacks)void[xmlRegExecCallbacks](#xmlRegExecCallbacks)([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec,
const[xmlChar](libxml-xmlstring.html#xmlChar)* token,
void * transdata,
void * inputdata)
int[xmlRegExecErrInfo](#xmlRegExecErrInfo)([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec,
const[xmlChar](libxml-xmlstring.html#xmlChar)** string,
int * nbval,
int * nbneg,
[xmlChar](libxml-xmlstring.html#xmlChar)** values,
int * terminal)
int[xmlRegExecNextValues](#xmlRegExecNextValues)([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec,
int * nbval,
int * nbneg,
[xmlChar](libxml-xmlstring.html#xmlChar)** values,
int * terminal)
int[xmlRegExecPushString](#xmlRegExecPushString)([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec,
const[xmlChar](libxml-xmlstring.html#xmlChar)* value,
void * data)
int[xmlRegExecPushString2](#xmlRegExecPushString2)([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec,
const[xmlChar](libxml-xmlstring.html#xmlChar)* value,
const[xmlChar](libxml-xmlstring.html#xmlChar)* value2,
void * data)
void[xmlRegFreeExecCtxt](#xmlRegFreeExecCtxt)([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec)
void[xmlRegFreeRegexp](#xmlRegFreeRegexp)([xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)regexp)
[xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)[xmlRegNewExecCtxt](#xmlRegNewExecCtxt)([xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)comp,
[xmlRegExecCallbacks](libxml-xmlregexp.html#xmlRegExecCallbacks)callback,
void * data)
[xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)[xmlRegexpCompile](#xmlRegexpCompile)(const[xmlChar](libxml-xmlstring.html#xmlChar)* regexp)
int[xmlRegexpExec](#xmlRegexpExec)([xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)comp,
const[xmlChar](libxml-xmlstring.html#xmlChar)* content)
int[xmlRegexpIsDeterminist](#xmlRegexpIsDeterminist)([xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)comp)
void[xmlRegexpPrint](#xmlRegexpPrint)(FILE * output,
[xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)regexp)

Description

Structure xmlExpCtxt

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

Structure xmlExpNode

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

Enum xmlExpNodeType

Enum xmlExpNodeType {XML\_EXP\_EMPTY= 0XML\_EXP\_FORBID= 1XML\_EXP\_ATOM= 2XML\_EXP\_SEQ= 3XML\_EXP\_OR= 4XML\_EXP\_COUNT= 5
}

Structure xmlRegExecCtxt

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

A libxml progressive regular expression evaluation context

Structure xmlRegexp

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

A libxml regular expression, they can actually be far more complex thank the POSIX regex expressions.

Function: xmlExpCtxtNbCons

int	xmlExpCtxtNbCons ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt)

Debugging facility provides the number of allocated nodes over lifetime

| ctxt: | an expression context | | Returns: | the number of nodes ever allocated or -1 in case of error |

Function: xmlExpCtxtNbNodes

int	xmlExpCtxtNbNodes ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt)

Debugging facility provides the number of allocated nodes at a that point

| ctxt: | an expression context | | Returns: | the number of nodes in use or -1 in case of error |

Function: xmlExpDump

void	xmlExpDump ([xmlBufferPtr](libxml-tree.html#xmlBufferPtr)buf,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)expr)

Serialize the expression as compiled to the buffer

| buf: | a buffer to receive the output | | expr: | the compiled expression |

Function: xmlExpExpDerive

[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)xmlExpExpDerive ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)sub)

Evaluates the expression resulting from @exp consuming a sub expression @sub Based on algebraic derivation and sometimes direct Brzozowski derivation it usually tatkes less than linear time and can handle expressions generating infinite languages.

| ctxt: | the expressions context | | exp: | the englobing expression | | sub: | the subexpression | | Returns: | the resulting expression or NULL in case of internal error, the result must be freed |

Function: xmlExpFree

void	xmlExpFree ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp)

Dereference the expression

| ctxt: | the expression context | | exp: | the expression |

Function: xmlExpFreeCtxt

void	xmlExpFreeCtxt ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt)

Free an expression context

| ctxt: | an expression context |

Function: xmlExpGetLanguage

int	xmlExpGetLanguage ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp,
const[xmlChar](libxml-xmlstring.html#xmlChar)** langList,
int len)

Find all the strings used in @exp and store them in @list

| ctxt: | the expression context | | exp: | the expression | | langList: | where to store the tokens | | len: | the allocated length of @list | | Returns: | the number of unique strings found, -1 in case of errors and -2 if there is more than @len strings |

Function: xmlExpGetStart

int	xmlExpGetStart ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp,
const[xmlChar](libxml-xmlstring.html#xmlChar)** tokList,
int len)

Find all the strings that appears at the start of the languages accepted by @exp and store them in @list. E.g. for (a, b) | c it will return the list [a, c]

| ctxt: | the expression context | | exp: | the expression | | tokList: | where to store the tokens | | len: | the allocated length of @list | | Returns: | the number of unique strings found, -1 in case of errors and -2 if there is more than @len strings |

Function: xmlExpIsNillable

int	xmlExpIsNillable ([xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp)

Finds if the expression is nillable, i.e. if it accepts the empty sequqnce

| exp: | the expression | | Returns: | 1 if nillable, 0 if not and -1 in case of error |

Function: xmlExpMaxToken

int	xmlExpMaxToken ([xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)expr)

Indicate the maximum number of input a expression can accept

| expr: | a compiled expression | | Returns: | the maximum length or -1 in case of error |

Function: xmlExpNewAtom

[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)xmlExpNewAtom ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
const[xmlChar](libxml-xmlstring.html#xmlChar)* name,
int len)

Get the atom associated to this name from that context

| ctxt: | the expression context | | name: | the atom name | | len: | the atom name length in byte (or -1); | | Returns: | the node or NULL in case of error |

Function: xmlExpNewCtxt

[xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)xmlExpNewCtxt (int maxNodes,
[xmlDictPtr](libxml-dict.html#xmlDictPtr)dict)

Creates a new context for manipulating expressions

| maxNodes: | the maximum number of nodes | | dict: | optional dictionnary to use internally | | Returns: | the context or NULL in case of error |

Function: xmlExpNewOr

[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)xmlExpNewOr ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)left,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)right)

Get the atom associated to the choice @left | @right Note that @left and @right are consumed in the operation, to keep an handle on them use xmlExpRef() and use xmlExpFree() to release them, this is true even in case of failure (unless ctxt == NULL).

| ctxt: | the expression context | | left: | left expression | | right: | right expression | | Returns: | the node or NULL in case of error |

Function: xmlExpNewRange

[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)xmlExpNewRange ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)subset,
int min,
int max)

Get the atom associated to the range (@subset){@min, @max} Note that @subset is consumed in the operation, to keep an handle on it use xmlExpRef() and use xmlExpFree() to release it, this is true even in case of failure (unless ctxt == NULL).

| ctxt: | the expression context | | subset: | the expression to be repeated | | min: | the lower bound for the repetition | | max: | the upper bound for the repetition, -1 means infinite | | Returns: | the node or NULL in case of error |

Function: xmlExpNewSeq

[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)xmlExpNewSeq ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)left,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)right)

Get the atom associated to the sequence @left , @right Note that @left and @right are consumed in the operation, to keep an handle on them use xmlExpRef() and use xmlExpFree() to release them, this is true even in case of failure (unless ctxt == NULL).

| ctxt: | the expression context | | left: | left expression | | right: | right expression | | Returns: | the node or NULL in case of error |

Function: xmlExpParse

[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)xmlExpParse ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
const char * expr)

Minimal parser for regexps, it understand the following constructs - string terminals - choice operator | - sequence operator , - subexpressions (...) - usual cardinality operators + * and ? - finite sequences { min, max } - infinite sequences { min, * } There is minimal checkings made especially no checking on strings values

| ctxt: | the expressions context | | expr: | the 0 terminated string | | Returns: | a new expression or NULL in case of failure |

Function: xmlExpRef

void	xmlExpRef ([xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp)

Increase the reference count of the expression

| exp: | the expression |

Function: xmlExpStringDerive

[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)xmlExpStringDerive	([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp,
const[xmlChar](libxml-xmlstring.html#xmlChar)* str,
int len)

Do one step of Brzozowski derivation of the expression @exp with respect to the input string

| ctxt: | the expression context | | exp: | the expression | | str: | the string | | len: | the string len in bytes if available | | Returns: | the resulting expression or NULL in case of internal error |

Function: xmlExpSubsume

int	xmlExpSubsume ([xmlExpCtxtPtr](libxml-xmlregexp.html#xmlExpCtxtPtr)ctxt,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)exp,
[xmlExpNodePtr](libxml-xmlregexp.html#xmlExpNodePtr)sub)

Check whether @exp accepts all the languages accexpted by @sub the input being a subexpression.

| ctxt: | the expressions context | | exp: | the englobing expression | | sub: | the subexpression | | Returns: | 1 if true 0 if false and -1 in case of failure. |

Function type: xmlRegExecCallbacks

Function type: xmlRegExecCallbacks
void	xmlRegExecCallbacks ([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec,
const[xmlChar](libxml-xmlstring.html#xmlChar)* token,
void * transdata,
void * inputdata)

Callback function when doing a transition in the automata

| exec: | the regular expression context | | token: | the current token string | | transdata: | transition data | | inputdata: | input data |

Function: xmlRegExecErrInfo

int	xmlRegExecErrInfo ([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec,
const[xmlChar](libxml-xmlstring.html#xmlChar)** string,
int * nbval,
int * nbneg,
[xmlChar](libxml-xmlstring.html#xmlChar)** values,
int * terminal)

Extract error informations from the regexp execution, the parameter @string will be updated with the value pushed and not accepted, the parameter @values must point to an array of @nbval string pointers on return nbval will contain the number of possible strings in that state and the @values array will be updated with them. The string values

| exec: | a regexp execution context generating an error | | string: | return value for the error string | | nbval: | pointer to the number of accepted values IN/OUT | | nbneg: | return number of negative transitions | | values: | pointer to the array of acceptable values | | terminal: | return value if this was a terminal state | | Returns: | will be freed with the @exec context and don't need to be deallocated. Returns: 0 in case of success or -1 in case of error. |

Function: xmlRegExecNextValues

int	xmlRegExecNextValues ([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec,
int * nbval,
int * nbneg,
[xmlChar](libxml-xmlstring.html#xmlChar)** values,
int * terminal)

Extract informations from the regexp execution, the parameter @values must point to an array of @nbval string pointers on return nbval will contain the number of possible strings in that state and the @values array will be updated with them. The string values

| exec: | a regexp execution context | | nbval: | pointer to the number of accepted values IN/OUT | | nbneg: | return number of negative transitions | | values: | pointer to the array of acceptable values | | terminal: | return value if this was a terminal state | | Returns: | will be freed with the @exec context and don't need to be deallocated. Returns: 0 in case of success or -1 in case of error. |

Function: xmlRegExecPushString

int	xmlRegExecPushString ([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec,
const[xmlChar](libxml-xmlstring.html#xmlChar)* value,
void * data)

Push one input token in the execution context

| exec: | a regexp execution context or NULL to indicate the end | | value: | a string token input | | data: | data associated to the token to reuse in callbacks | | Returns: | 1 if the regexp reached a final state, 0 if non-final, and a negative value in case of error. |

Function: xmlRegExecPushString2

int	xmlRegExecPushString2 ([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec,
const[xmlChar](libxml-xmlstring.html#xmlChar)* value,
const[xmlChar](libxml-xmlstring.html#xmlChar)* value2,
void * data)

Push one input token in the execution context

| exec: | a regexp execution context or NULL to indicate the end | | value: | the first string token input | | value2: | the second string token input | | data: | data associated to the token to reuse in callbacks | | Returns: | 1 if the regexp reached a final state, 0 if non-final, and a negative value in case of error. |

Function: xmlRegFreeExecCtxt

void	xmlRegFreeExecCtxt ([xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)exec)

Free the structures associated to a regular expression evaulation context.

| exec: | a regular expression evaulation context |

Function: xmlRegFreeRegexp

void	xmlRegFreeRegexp ([xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)regexp)

Free a regexp

| regexp: | the regexp |

Function: xmlRegNewExecCtxt

[xmlRegExecCtxtPtr](libxml-xmlregexp.html#xmlRegExecCtxtPtr)xmlRegNewExecCtxt	([xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)comp,
[xmlRegExecCallbacks](libxml-xmlregexp.html#xmlRegExecCallbacks)callback,
void * data)

Build a context used for progressive evaluation of a regexp.

| comp: | a precompiled regular expression | | callback: | a callback function used for handling progresses in the automata matching phase | | data: | the context data associated to the callback in this context | | Returns: | the new context |

Function: xmlRegexpCompile

[xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)xmlRegexpCompile	(const[xmlChar](libxml-xmlstring.html#xmlChar)* regexp)

Parses a regular expression conforming to XML Schemas Part 2 Datatype Appendix F and builds an automata suitable for testing strings against that regular expression

| regexp: | a regular expression string | | Returns: | the compiled expression or NULL in case of error |

Function: xmlRegexpExec

int	xmlRegexpExec ([xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)comp,
const[xmlChar](libxml-xmlstring.html#xmlChar)* content)

Check if the regular expression generates the value

| comp: | the compiled regular expression | | content: | the value to check against the regular expression | | Returns: | 1 if it matches, 0 if not and a negative value in case of error |

Function: xmlRegexpIsDeterminist

int	xmlRegexpIsDeterminist ([xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)comp)

Check if the regular expression is determinist

| comp: | the compiled regular expression | | Returns: | 1 if it yes, 0 if not and a negative value in case of error |

Function: xmlRegexpPrint

void	xmlRegexpPrint (FILE * output,
[xmlRegexpPtr](libxml-xmlregexp.html#xmlRegexpPtr)regexp)

Print the content of the compiled regular expression

| output: | the file for the output debug | | regexp: | the compiled regexp |

Daniel Veillard

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