PrintStatement Struct Reference

A sed print statement, usually specified in one of the following forms: More...

#include <muSED.h>

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List of all members.

Public Member Functions
LineRangeActivationState	activationState ()
bool	active (ScriptRuntimeContext context, Statement statement)
	return true if the patternBuffer, line number, and isLast_ flag in the specified context match the requirements of the filters.
void	adoptChild (Statement *newbie)
	Take ownership of a new statement and schedule it for delete when *this is destructed.
void	clear ()
std::string	debugPrefix () const
virtual std::string	debugString () const
virtual std::string	debugStringPrefix () const
bool	execute (ScriptRuntimeContext *context)
	Invoke context->Print().
	PrintStatement (Statement *parent, int fc, Filter const &f1, Filter const &f2, bool filtersInverted, bool firstLineOnly)
void	setActivationState (LineRangeActivationState newState)
virtual	~PrintStatement ()
Static Public Member Functions
static void	debugPrint (Statement *p)
template<class StringIterator1 , class StringIterator2 , class CompiledScript >
static Statement *	parse (Statement *parent, int filterCount, Filter const &f1, Filter const &f2, bool inverted, StringIterator1 &firstChar, StringIterator2 const &lastChar, size_t line, CompiledScript &script)
Public Attributes
ActivationMap	childStatementActivationMap_
std::list< Statement * >	childStatements_
Filter	filter1_
Filter	filter2_
int	filters_
bool	firstLineOnly_
	If true, print only up to the first \n character found in the pattern buffer.
bool	inverted_
Statement *	parentStatement_

Detailed Description

A sed print statement, usually specified in one of the following forms:

           p    # prints the whole pattern buffer
           P    # prints only up to the first \\n.

Prints the contents of the sed pattern buffer. A "print" operation output one or more strings into the output sequence associated with the script's runtmie context. See the muSED::ScriptRuntimeContext::print()

Note that the two different forms of the statement behave slightly differently with respect to \n characters in the pattern buffer. In the unix sed executable, the pattern buffer will only have \n characters in it if the script itself puts them there -- as lines are automatically split before script processing. This input splitting does not occur in muSED. The caller may include \n in the input strings.

The script can force \n characters into the pattern buffer in the following ways:

the 'y' command can translate any character into a \n
the 's' command can replace any sequence of charactes into a \n
the 'G' command can append the hold buffer to the pattern buffer using \n as a delimiter
the 'x' command can swap the pattern buffer with the hold buffer which might have \n in it if the H command were previously used to append the pattern buffer to the hold buffer.

The 'P' command prints only up to the first \n in the pattern buffer to the output sequences (or the whole pattern buffer if there is no \n).

The 'p' command prints each \n delimited component of the the pattern buffer to the output sequences.

Definition at line 1036 of file muSED.h.

Constructor & Destructor Documentation

virtual ~PrintStatement ( ) [virtual]

Definition at line 1077 of file muSED.h.

PrintStatement	(	Statement *	parent,
		int	fc,
		Filter const &	f1,
		Filter const &	f2,
		bool	filtersInverted,
		bool	firstLineOnly
	)

Definition at line 1084 of file muSED.h.

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Member Function Documentation

LineRangeActivationState activationState ( ) [inherited]

Definition at line 119 of file muSED.cxx.

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bool active	(	ScriptRuntimeContext *	context,
		Statement *	statement
	)			`[inherited]`

return true if the patternBuffer, line number, and isLast_ flag in the specified context match the requirements of the filters.

Parameters:

`[in]`	context	The runtime context in which to determine if the current statement, as defined both by the statement pointer and by line number information in the context, is active.
`[in]`	statement	The statement about to be executed on the current line of input as defined by the line number and is last flag in the context.

Note that the runtime context keeps track of the activation status of statements, by the statement pointer, based on the filters in a filterable statement. Whenever you have a range filter, the activate function manages the activation state.

Definition at line 316 of file muSED.cxx.

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void adoptChild ( Statement * newbie ) [inherited]

Take ownership of a new statement and schedule it for delete when *this is destructed.

Definition at line 444 of file muSED.h.

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void clear ( ) [inherited]

Definition at line 434 of file muSED.h.

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std::string debugPrefix ( ) const [inherited]

Definition at line 459 of file muSED.h.

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static void debugPrint ( Statement * p ) [static, inherited]

Definition at line 474 of file muSED.h.

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std::string debugString ( ) const [virtual]

Reimplemented from Statement.

Definition at line 622 of file muSED.cxx.

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std::string debugStringPrefix ( ) const [virtual, inherited]

Definition at line 545 of file muSED.cxx.

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bool execute ( ScriptRuntimeContext * context ) [virtual]

Invoke context->Print().

Implements Statement.

Definition at line 692 of file muSED.cxx.

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static Statement* parse	(	Statement *	parent,
		int	filterCount,
		Filter const &	f1,
		Filter const &	f2,
		bool	inverted,
		StringIterator1 &	firstChar,
		StringIterator2 const &	lastChar,
		size_t	line,
		CompiledScript &	script
	)			`[static]`