/usr/include/crystalspace-2.0/csutil/regexp.h is in libcrystalspace-dev 2.0+dfsg-1build1.
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Copyright (C) 2004 by Frank Richter
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __CS_UTIL_REGEXP_H__
#define __CS_UTIL_REGEXP_H__
/**\file
* Regular expressions support.
*/
#include "csextern.h"
#include "csutil/array.h"
// Include system's (if available) ...
#ifdef CS_HAVE_REGEX
#include <regex.h>
#else
// ... resp. the one included with CS.
#if (defined(CS_COMPILER_MSVC) || defined(CS_COMPILER_BCC)) && \
!defined(__STDC__)
#define __STDC__ 1
#define __STDC__DEFINED
#endif
#include "generic/regex.h"
#ifdef __STDC__DEFINED
#undef __STDC__
#endif
#endif
/**
* Possible errors that can occur during matching.
*/
enum csRegExpMatchError
{
/// No problems during matching.
csrxNoError,
/// The pattern didn't match the string.
csrxNoMatch,
/**
* There was an invalid \c \\{...\\} construct in the regular expression.
* A valid \c \\{...\\} construct must contain either a single number, or
* two numbers in increasing order separated by a comma.
*/
csrxBadBraces,
/**
* There was a syntax error in the regular expression.
*/
csrxBadPattern,
/**
* A repetition operator such as ? or * appeared in a bad position (with no
* preceding subexpression to act on).
*/
csrxBadRepetition,
/**
* The regular expression referred to an invalid collating element (one not
* defined in the current locale for string collation).
*/
csrxErrCollate,
/**
* The regular expression referred to an invalid character class name.
*/
csrxErrCharType,
/**
* The regular expression ended with \c \\.
*/
csrxErrEscape,
/**
* There was an invalid number in the \c \\digit construct.
*/
csrxErrSubReg,
/**
* There were unbalanced square brackets in the regular expression.
*/
csrxErrBrackets,
/**
* An extended regular expression had unbalanced parentheses, or a basic
* regular expression had unbalanced \c \\( and \c \\).
*/
csrxErrParentheses,
/**
* The regular expression had unbalanced \c \\{ and \c \\}.
*/
csrxErrBraces,
/**
* One of the endpoints in a range expression was invalid.
*/
csrxErrRange,
/**
* Out of memory.
*/
csrxErrSpace,
/**
* Unknown error.
*/
csrxErrUnknown
};
/**
* Flags for regular expression matching
*/
enum csRegExpMatchFlags
{
/**
* Ignore case when matching letters.
*/
csrxIgnoreCase = 1,
/**
* Treat a newline in string as dividing string into multiple lines, so that
* \c $ can match before the newline and \c ^ can match after. Also, don't
* permit \c . to match a newline, and don't permit \c [^...] to match a
* newline.
*
* Otherwise, newline acts like any other ordinary character.
*/
csrxNewLine = 2,
/**
* Do not regard the beginning of the specified string as the beginning of a
* line; more generally, don't make any assumptions about what text might
* precede it.
*/
csrxNotBOL = 4,
/**
* Do not regard the end of the specified string as the end of a line; more
* generally, don't make any assumptions about what text might follow it.
*/
csrxNotEOL = 8
};
/**
* Information about (sub)expression matches.
*/
struct CS_CRYSTALSPACE_EXPORT csRegExpMatch
{
/// Offset to the match from the beginning of the string to match against.
size_t startOffset;
/**
* Offset to the end of the match from the beginning of the string to match
* against.
*/
size_t endOffset;
};
/**
* Matcher for regular expressions.
* \note Implementation note: if the platform supports it, this class wraps
* the runtime libraries POSIX.2 regular expression interface; otherwise,
* it uses a built-in implementation of POSIX.2 regular expression (borrowed
* from glibc.) Both of them utiltize "compilation" of pattern for faster
* repeated matching of the same pattern. Although compilation is transparent,
* you should be aware that calls to Match() with different flags than
* previous calls cause a recompilation of the pattern. Thus, to improve
* performance, same \p flags should be used for subsequent calls to Match().
*/
class CS_CRYSTALSPACE_EXPORT csRegExpMatcher :
public CS::Memory::CustomAllocated
{
regex_t regex;
char* pattern;
int compiledFlags;
bool regexpSetup : 1;
bool extendedRE : 1;
csRegExpMatchError compileError : 30;
bool Compile (int flags, bool nosub);
public:
/**
* Create a new RE matcher.
* \param pattern Pattern to match against.
* \param extendedRE Treat the pattern as an extended regular expression,
* rather than as a basic regular expression.
*/
csRegExpMatcher (const char* pattern, bool extendedRE = false);
/// Copy constructor
csRegExpMatcher (const csRegExpMatcher& other);
/// Destructor.
~csRegExpMatcher ();
/// Assignment operator
csRegExpMatcher& operator= (const csRegExpMatcher &other);
/**
* Match a string against the pattern.
* \param string String against which to attempt match.
* \param flags One or more of csRegExpMatchFlags. Flags are combined using
* the bitwise-or \p | operator.
* \return csrxNoError in case of success, else an error code.
* \note Also check the "Implementation note" in the csRegExpMatcher
* description.
*/
csRegExpMatchError Match (const char* string, int flags = 0);
/**
* Match a string against the pattern.
* \param string String against which to attempt match.
* \param matches Array receiving the locations of individual
* (sub)expression matches.
* \param flags One or more of csRegExpMatchFlags. Flags are combined using
* the bitwise-or \p | operator.
* \return csrxNoError in case of success, else an error code.
* \note Also check the "Implementation note" in the csRegExpMatcher
* description.
*/
csRegExpMatchError Match (const char* string,
csArray<csRegExpMatch>& matches, int flags = 0);
};
#endif // __CS_UTIL_REGEXP_H__
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