dtc: remove unused (since r306806) string.hh
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/*-
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* Copyright (c) 2013 David Chisnall
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _STRING_HH_
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#define _STRING_HH_
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#include "input_buffer.hh"
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#include <string>
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#include <functional>
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namespace dtc
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{
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/**
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* String, referring to a place in the input file. We don't bother copying
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* strings until we write them to the final output. These strings should be
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* two words long: a start and a length. They are intended to be cheap to copy
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* and store in collections. Copying the string object does not copy the
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* underlying storage.
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*
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* Strings are not nul-terminated.
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*/
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class string
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{
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friend std::hash<string>;
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/** Start address. Contained within the mmap()'d input file and not
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* owned by this object. */
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const char *start;
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/** length of the string. DTS strings are allowed to contain nuls */
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int length;
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/** Generic function for parsing strings matching the character set
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* defined by the template argument. */
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template<class T>
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static string parse(input_buffer &s);
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public:
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/**
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* Constructs a string referring into another buffer.
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*/
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string(const char *s, int l) : start(s), length(l) {}
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/** Constructs a string from a C string. */
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string(const char *s) : start(s), length(strlen(s)) {}
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/** Default constructor, returns an empty string. */
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string() : start(0), length(0) {}
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/** Construct a from an input buffer, ending with a nul terminator. */
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string(input_buffer &s);
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/**
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* Returns the longest string in the input buffer starting at the
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* current cursor and composed entirely of characters that are valid in
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* node names.
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*/
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static string parse_node_name(input_buffer &s);
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/**
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* Returns the longest string in the input buffer starting at the
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* current cursor and composed entirely of characters that are valid in
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* property names.
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*/
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static string parse_property_name(input_buffer &s);
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/**
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* Parses either a node or a property name. If is_property is true on
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* entry, then only property names are parsed. If it is false, then it
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* will be set, on return, to indicate whether the parsed name is only
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* valid as a property.
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*/
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static string parse_node_or_property_name(input_buffer &s,
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bool &is_property);
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/**
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* Compares two strings for equality. Strings are equal if they refer
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* to identical byte sequences.
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*/
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bool operator==(const string& other) const;
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/**
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* Compares a string against a C string. The trailing nul in the C
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* string is ignored for the purpose of comparison, so this will always
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* fail if the string contains nul bytes.
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*/
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bool operator==(const char *other) const;
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/**
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* Inequality operator, defined as the inverse of the equality
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* operator.
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*/
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template <typename T>
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inline bool operator!=(T other)
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{
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return !(*this == other);
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}
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/**
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* Comparison operator, defined to allow strings to be used as keys in
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* maps.
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*/
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bool operator<(const string& other) const;
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/**
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* Returns true if this is the empty string, false otherwise.
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*/
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inline bool empty() const
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{
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return length == 0;
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}
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/**
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* Returns the size of the string, in bytes.
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*/
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inline size_t size()
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{
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return length;
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}
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/**
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* Writes the string to the specified buffer.
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*/
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void push_to_buffer(byte_buffer &buffer, bool escapes=false);
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/**
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* Prints the string to the specified output stream.
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*/
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void print(FILE *file);
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/**
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* Dumps the string to the standard error stream. Intended to be used
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* for debugging.
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*/
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void dump();
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};
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} // namespace dtc
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namespace std
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{
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template<>
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struct hash<dtc::string>
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{
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std::size_t operator()(dtc::string const& s) const
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{
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std::string str(s.start, s.length);
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std::hash<std::string> h;
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return h(str);
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}
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};
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}
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#endif // !_STRING_HH_
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