+++ /dev/null
-// Copyright (c) 2005, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-// * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// Author: Sanjay Ghemawat
-//
-// Regular-expression based scanner for parsing an input stream.
-//
-// Example 1: parse a sequence of "var = number" entries from input:
-//
-// Scanner scanner(input);
-// string var;
-// int number;
-// scanner.SetSkipExpression("\\s+"); // Skip any white space we encounter
-// while (scanner.Consume("(\\w+) = (\\d+)", &var, &number)) {
-// ...;
-// }
-
-#ifndef _PCRE_SCANNER_H
-#define _PCRE_SCANNER_H
-
-#include <assert.h>
-#include <string>
-#include <vector>
-
-#include <pcrecpp.h>
-#include <pcre_stringpiece.h>
-
-namespace pcrecpp {
-
-class PCRECPP_EXP_DEFN Scanner {
- public:
- Scanner();
- explicit Scanner(const std::string& input);
- ~Scanner();
-
- // Return current line number. The returned line-number is
- // one-based. I.e. it returns 1 + the number of consumed newlines.
- //
- // Note: this method may be slow. It may take time proportional to
- // the size of the input.
- int LineNumber() const;
-
- // Return the byte-offset that the scanner is looking in the
- // input data;
- int Offset() const;
-
- // Return true iff the start of the remaining input matches "re"
- bool LookingAt(const RE& re) const;
-
- // Return true iff all of the following are true
- // a. the start of the remaining input matches "re",
- // b. if any arguments are supplied, matched sub-patterns can be
- // parsed and stored into the arguments.
- // If it returns true, it skips over the matched input and any
- // following input that matches the "skip" regular expression.
- bool Consume(const RE& re,
- const Arg& arg0 = RE::no_arg,
- const Arg& arg1 = RE::no_arg,
- const Arg& arg2 = RE::no_arg
- // TODO: Allow more arguments?
- );
-
- // Set the "skip" regular expression. If after consuming some data,
- // a prefix of the input matches this RE, it is automatically
- // skipped. For example, a programming language scanner would use
- // a skip RE that matches white space and comments.
- //
- // scanner.SetSkipExpression("\\s+|//.*|/[*](.|\n)*?[*]/");
- //
- // Skipping repeats as long as it succeeds. We used to let people do
- // this by writing "(...)*" in the regular expression, but that added
- // up to lots of recursive calls within the pcre library, so now we
- // control repetition explicitly via the function call API.
- //
- // You can pass NULL for "re" if you do not want any data to be skipped.
- void Skip(const char* re); // DEPRECATED; does *not* repeat
- void SetSkipExpression(const char* re);
-
- // Temporarily pause "skip"ing. This
- // Skip("Foo"); code ; DisableSkip(); code; EnableSkip()
- // is similar to
- // Skip("Foo"); code ; Skip(NULL); code ; Skip("Foo");
- // but avoids creating/deleting new RE objects.
- void DisableSkip();
-
- // Reenable previously paused skipping. Any prefix of the input
- // that matches the skip pattern is immediately dropped.
- void EnableSkip();
-
- /***** Special wrappers around SetSkip() for some common idioms *****/
-
- // Arranges to skip whitespace, C comments, C++ comments.
- // The overall RE is a disjunction of the following REs:
- // \\s whitespace
- // //.*\n C++ comment
- // /[*](.|\n)*?[*]/ C comment (x*? means minimal repetitions of x)
- // We get repetition via the semantics of SetSkipExpression, not by using *
- void SkipCXXComments() {
- SetSkipExpression("\\s|//.*\n|/[*](?:\n|.)*?[*]/");
- }
-
- void set_save_comments(bool comments) {
- save_comments_ = comments;
- }
-
- bool save_comments() {
- return save_comments_;
- }
-
- // Append to vector ranges the comments found in the
- // byte range [start,end] (inclusive) of the input data.
- // Only comments that were extracted entirely within that
- // range are returned: no range splitting of atomically-extracted
- // comments is performed.
- void GetComments(int start, int end, std::vector<StringPiece> *ranges);
-
- // Append to vector ranges the comments added
- // since the last time this was called. This
- // functionality is provided for efficiency when
- // interleaving scanning with parsing.
- void GetNextComments(std::vector<StringPiece> *ranges);
-
- private:
- std::string data_; // All the input data
- StringPiece input_; // Unprocessed input
- RE* skip_; // If non-NULL, RE for skipping input
- bool should_skip_; // If true, use skip_
- bool skip_repeat_; // If true, repeat skip_ as long as it works
- bool save_comments_; // If true, aggregate the skip expression
-
- // the skipped comments
- // TODO: later consider requiring that the StringPieces be added
- // in order by their start position
- std::vector<StringPiece> *comments_;
-
- // the offset into comments_ that has been returned by GetNextComments
- int comments_offset_;
-
- // helper function to consume *skip_ and honour
- // save_comments_
- void ConsumeSkip();
-};
-
-} // namespace pcrecpp
-
-#endif /* _PCRE_SCANNER_H */
projects / vuplus_xbmc / blobdiff