? ? ? ? ? ?

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Parser Class Reference

Collaboration diagram for Parser:

[legend] List of all members.

Public Methods
?	Parser (Awk *awk, const cmt_string pattern, const cmt_regexp *expression)
Awk::condition?	parse (const cmt_string &text)
?	this first level parsing function extracts individual lines from the text, taking care of both Unix and Windows EOL styles.
Awk::condition?	parse_line (const cmt_string &line)
?	This second level parsing function accumulates individual lines with real trailing back slashes.
Private Attributes
cmt_string?	m_accumulator
cmt_string?	m_pattern
const cmt_regexp *?	m_expression
Awk *?	m_awk

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Constructor & Destructor Documentation

Parser::Parser (? Awk *? ? awk, const cmt_string? ? pattern, const cmt_regexp *? ? expression )? [inline]

?	Definition at line 19 of file cmt_awk.cxx. References m_awk, m_expression, and m_pattern. : m_pattern (pattern), m_expression (expression), m_awk(awk) { }

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Member Function Documentation

Awk::condition Parser::parse (? const cmt_string &? ? text )? [inline]

?

this first level parsing function extracts individual lines from the text, taking care of both Unix and Windows EOL styles. Then the second level parsing function parse_line is called. Definition at line 30 of file cmt_awk.cxx. References Awk::condition, cmt_string::erase(), cmt_string::find(), Awk::inc_line_number(), m_accumulator, m_awk, cmt_string::npos, Awk::ok, parse_line(), cmt_string::size(), and cmt_string::substr(). Referenced by Awk::run(). { Awk::condition result = Awk::ok; cmt_string line; int pos; int max_pos; pos = 0; max_pos = text.size (); m_accumulator.erase (0); for (pos = 0; pos < max_pos;) { int eol = text.find (pos, '\n'); if (eol == cmt_string::npos) { // Last line, since there is no eol at all text.substr (pos, line); pos = max_pos; } else { int length = 1; int cr = text.find (pos, "\r\n"); if (cr == (eol-1)) { eol = cr; length = 2; } if (eol == pos) { // this is an empty line line = ""; pos += length; } else { // The eol was found beyond the current position // (ie. this is a non empty line) text.substr (pos, eol - pos, line); pos = eol + length; } } if (m_awk != 0) m_awk->inc_line_number (); //cout << "parse> line=[" << line << "]" << endl; result = parse_line (line); if (result != Awk::ok) break; } return (result); }

Awk::condition Parser::parse_line (? const cmt_string &? ? line )? [inline]

?

This second level parsing function accumulates individual lines with real trailing back slashes. Eventually the possible text pattern or regular expression is checked and the Awk::filter function is called in case of succesful match onto the accumulated line. Definition at line 98 of file cmt_awk.cxx. References Awk::condition, cmt_string::erase(), Awk::filter(), cmt_string::find(), cmt_string::find_last_of(), Awk::get_last_condition(), m_accumulator, m_awk, m_expression, m_pattern, cmt_regexp::match(), cmt_string::npos, Awk::ok, and cmt_string::size(). Referenced by parse(). { Awk::condition result = Awk::ok; int length; cmt_string temp_line = line; // // We scan the line for handling backslashes. // // Really terminating backslashes (ie those only followed by spaces/tabs // mean continued line // // bool finished = true; length = temp_line.size (); if (length == 0) { // An empty line following a backslash terminates the continuation. finished = true; } else { int back_slash = temp_line.find_last_of ('\\'); if (back_slash != cmt_string::npos) { // // This is the last backslash // check if there are only space chars after it // bool at_end = true; for (int i = (back_slash + 1); i < length; i++) { char c = temp_line[i]; if ((c != ' ') && (c != '\t')) { at_end = false; break; } } if (at_end) { temp_line.erase (back_slash); finished = false; } else { // This was not a trailing backslash. finished = true; } } m_accumulator += temp_line; } //cout << "parse_line1> accumulator=[" << m_accumulator << "]" << endl; //cout << "parse_line1> finished=[" << finished << "]" << endl; if (!finished) { // We still need to accumulate forthcoming lines // before parsing the resulting text. return (Awk::ok); } // now filter the complete accumulated line (if non empty) if (m_accumulator != "") { bool ok = false; if (m_expression != 0) { if (m_expression->match (m_accumulator)) { ok = true; } } else { if ((m_pattern == "") || (m_accumulator.find (m_pattern) != cmt_string::npos)) { ok = true; } } if (ok && (m_awk != 0)) { //cout << "parse_line> accumulator=[" << m_accumulator << "]" << endl; m_awk->filter (m_accumulator); result = m_awk->get_last_condition (); } m_accumulator.erase (0); } return (result); }

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Member Data Documentation

cmt_string Parser::m_accumulator [private]

?	Definition at line 207 of file cmt_awk.cxx. Referenced by parse(), and parse_line().

Awk* Parser::m_awk [private]

?	Definition at line 210 of file cmt_awk.cxx. Referenced by parse(), parse_line(), and Parser().

const cmt_regexp* Parser::m_expression [private]

?	Definition at line 209 of file cmt_awk.cxx. Referenced by parse_line(), and Parser().

cmt_string Parser::m_pattern [private]

?	Definition at line 208 of file cmt_awk.cxx. Referenced by parse_line(), and Parser().

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The documentation for this class was generated from the following file:

• cmt_awk.cxx

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