104 lines
3.3 KiB
C++
104 lines
3.3 KiB
C++
/* Cache of styled source file text
|
|
Copyright (C) 2018-2020 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef SOURCE_CACHE_H
|
|
#define SOURCE_CACHE_H
|
|
|
|
#include <unordered_map>
|
|
#include <unordered_set>
|
|
|
|
/* This caches two things related to source files.
|
|
|
|
First, it caches highlighted source text, keyed by the source
|
|
file's full name. A size-limited LRU cache is used.
|
|
|
|
Highlighting depends on the GNU Source Highlight library. When not
|
|
available or when highlighting fails for some reason, this cache
|
|
will instead store the un-highlighted source text.
|
|
|
|
Second, this will cache the file offsets corresponding to the start
|
|
of each line of a source file. This cache is not size-limited. */
|
|
class source_cache
|
|
{
|
|
public:
|
|
|
|
source_cache ()
|
|
{
|
|
}
|
|
|
|
/* This returns the vector of file offsets for the symtab S,
|
|
computing the vector first if needed.
|
|
|
|
On failure, returns false.
|
|
|
|
On success, returns true and sets *OFFSETS. This pointer is not
|
|
guaranteed to remain valid across other calls to get_source_lines
|
|
or get_line_charpos. */
|
|
bool get_line_charpos (struct symtab *s,
|
|
const std::vector<off_t> **offsets);
|
|
|
|
/* Get the source text for the source file in symtab S. FIRST_LINE
|
|
and LAST_LINE are the first and last lines to return; line
|
|
numbers are 1-based. If the file cannot be read, or if the line
|
|
numbers are out of range, false is returned. Otherwise,
|
|
LINES_OUT is set to the desired text. The returned text may
|
|
include ANSI terminal escapes. */
|
|
bool get_source_lines (struct symtab *s, int first_line,
|
|
int last_line, std::string *lines_out);
|
|
|
|
/* Remove all the items from the source cache. */
|
|
void clear ()
|
|
{
|
|
m_source_map.clear ();
|
|
m_offset_cache.clear ();
|
|
}
|
|
|
|
private:
|
|
|
|
/* One element in the cache. */
|
|
struct source_text
|
|
{
|
|
/* The full name of the file. */
|
|
std::string fullname;
|
|
/* The contents of the file. */
|
|
std::string contents;
|
|
};
|
|
|
|
/* A helper function for get_source_lines reads a source file.
|
|
Returns the contents of the file; or throws an exception on
|
|
error. This also updates m_offset_cache. */
|
|
std::string get_plain_source_lines (struct symtab *s,
|
|
const std::string &fullname);
|
|
|
|
/* A helper function that the data for the given symtab is entered
|
|
into both caches. Returns false on error. */
|
|
bool ensure (struct symtab *s);
|
|
|
|
/* The contents of the source text cache. */
|
|
std::vector<source_text> m_source_map;
|
|
|
|
/* The file offset cache. The key is the full name of the source
|
|
file. */
|
|
std::unordered_map<std::string, std::vector<off_t>> m_offset_cache;
|
|
};
|
|
|
|
/* The global source cache. */
|
|
extern source_cache g_source_cache;
|
|
|
|
#endif /* SOURCE_CACHE_H */
|