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Use gdb unordered map in tui-io.c

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This changes tui.c to use gdb::unordered_map.  ui_file_style::color is
changed a little as well; operator< is no longer needed, but a simple
hash function is added.

Approved-By: Simon Marchi <simon.marchi@efficios.com>
This commit is contained in:
Tom Tromey
2025-03-13 16:44:05 -06:00
parent b5b4ed06aa
commit fa52d173f9
2 changed files with 30 additions and 19 deletions
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31
gdb/tui/tui-io.c
View File

@@ -42,7 +42,7 @@
#include "gdbsupport/filestuff.h"
#include "completer.h"
#include "gdb_curses.h"
#include <map>
#include "gdbsupport/unordered_map.h"
#include "pager.h"
#include "gdbsupport/gdb-checked-static-cast.h"
@@ -178,9 +178,19 @@ tui_putc (char c)
update_cmdwin_start_line ();
}
/* Hasher for colors. */
struct color_hash
{
size_t operator() (const ui_file_style::color &color) const noexcept
{
return color.hash ();
}
};
/* This maps colors to their corresponding color index. */
static std::map<ui_file_style::color, int> color_map;
static gdb::unordered_map<ui_file_style::color, int, color_hash> color_map;
/* This holds a pair of colors and is used to track the mapping
between a color pair index and the actual colors. */
@@ -190,16 +200,27 @@ struct color_pair
int fg;
int bg;
bool operator< (const color_pair &o) const
bool operator== (const color_pair &other) const noexcept
{
return fg < o.fg || (fg == o.fg && bg < o.bg);
return fg == other.fg && bg == other.bg;
}
};
struct color_pair_hash
{
using is_avalanching = void;
size_t operator() (const color_pair &val) const noexcept
{
static_assert (std::has_unique_object_representations_v<color_pair>);
return ankerl::unordered_dense::detail::wyhash::hash (&val, sizeof (val));
}
};
/* This maps pairs of colors to their corresponding color pair
index. */
static std::map<color_pair, int> color_pair_map;
static gdb::unordered_map<color_pair, int, color_pair_hash> color_pair_map;
/* This is indexed by ANSI color offset from the base color, and holds
the corresponding curses color constant. */

18
gdb/ui-style.h
View File

@@ -151,22 +151,12 @@ struct ui_file_style
return ! (*this == other);
}
bool operator< (const color &other) const
/* Compute a simple hash code for this object. */
size_t hash () const
{
if (m_color_space != other.m_color_space)
return m_color_space < other.m_color_space;
if (is_simple ())
return m_value < other.m_value;
if (m_red < other.m_red)
return true;
if (m_red == other.m_red)
{
if (m_green < other.m_green)
return true;
if (m_green == other.m_green)
return m_blue < other.m_blue;
}
return false;
return m_value;
return (m_red << 16) + (m_green << 8) + m_red;
}
color_space colorspace () const