RegExpInitAlloc

Allocates memory and initializes the structure for processing matching operation with regular expressions.

Syntax

IppStatus ippsRegExpInitAlloc(const char* pPattern, const char* pOptions, IppRegExpState** ppRegExpState, int* pErrOffset);

Parameters

pPattern

Pointer to the pattern of regular expression.

pOptions

Pointer to options for compiling and executing regular expressions (possible values i, s, m, x, g). It must be NULL if no options are required.

ppRegExpState

Double pointer to the structure containing internal form of a regular expression.

pErrOffset

Pointer to the offset in the pattern if compiling is break.

Description

The function ippsRegExpInitAlloc is declared in the ippch.h file. This function allocates memory and initializes a regular expression state structure ppRegExpState. The function compiles the initial pattern of regular expressions pPattern in accordance with the compiling options specified by pOptions, converts it to the specific internal form, and stores it in the initialized structure. This structure is used by the function ippsRegExpFind to perform matching operation.

If the compiling is not completed, the function returns the pointer pErrOffset pointed to the position in the pattern where the compiling is interrupted.

Code example shows how to use the function ippsRegExpInitAlloc.

Return Values

ippStsNoErr

Indicates no error.

ippStsNullPtrErr

Indicates an error condition if one of the specified pointers is NULL.

ippStsRegExpOptionsErr

Indicates an error if specified options are incorrect

ippStsRegExpQuantifierErr

Indicates an error if the quantifier is incorrect

ippStsRegExpGroupingErr

Indicates an error if the grouping is incorrect

ippStsRegExpBackRefErr

Indicates an error if the back reference is incorrect

ippStsRegExpChClassErr

Indicates an error if the character class is incorrect

ippStsRegExpMetaChErr

Indicates an error if the metacharacter is incorrect

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