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Lua: bit.value

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This commit is contained in:
Ilari Liusvaara 2012-03-08 08:00:19 +02:00
parent 626ff5e200
commit 66fca7925c
3 changed files with 41 additions and 3 deletions
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16
manual.lyx
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@ -2163,6 +2163,16 @@ There are two special bit positions, true and false, standing for always
set bit and always clear bit.
\end_layout
\begin_layout Subsubsection
bit.value([number bit1[, number bit2,...]])
\end_layout
\begin_layout Standard
Returns bitwise OR of 1 left shifted by bit1 places, 1 left shifted by bit2
places and so on.
As special value, nil argument is no-op.
\end_layout
\begin_layout Subsection
Table gui:
\end_layout
@ -2461,7 +2471,7 @@ Returns a new palette (initially all transparent).
\end_layout
\begin_layout Subsubsection
gui.bitmap_new(number w, number h, boolean direct)
gui.bitmap_new(number w, number h, boolean direct[, bool icolor])
\end_layout
\begin_layout Standard
@ -2482,6 +2492,10 @@ h: The height of new bitmap
direct: If true, the returned bitmap is dbitmap, otherwise bitmap.
\end_layout
\begin_layout Itemize
icolor: Initital fill color (defaults to 0 on BITMAP, -1 on DBITMAP)
\end_layout
\begin_layout Subsubsection
gui.bitmap_load(string file)
\end_layout

12
manual.txt
View file

@ -1054,6 +1054,12 @@ Notes:
• There are two special bit positions, true and false, standing
for always set bit and always clear bit.
8.2.11 bit.value([number bit1[, number bit2,...]])
Returns bitwise OR of 1 left shifted by bit1 places, 1 left
shifted by bit2 places and so on. As special value, nil argument
is no-op.
8.3 Table gui:
Most of these functions can only be called in on_paint and
@ -1211,7 +1217,8 @@ Draw a bitmap on screen. Parameters:
Returns a new palette (initially all transparent). Can be used
anywhere.
8.3.15 gui.bitmap_new(number w, number h, boolean direct)
8.3.15 gui.bitmap_new(number w, number h, boolean direct[, bool
icolor])
Returns a new bitmap/dbitmap. Can be used anywhere. Parameters:
@ -1222,6 +1229,9 @@ Returns a new bitmap/dbitmap. Can be used anywhere. Parameters:
• direct: If true, the returned bitmap is dbitmap, otherwise
bitmap.
• icolor: Initital fill color (defaults to 0 on BITMAP, -1 on
DBITMAP)
8.3.16 gui.bitmap_load(string file)
Returns loaded bitmap/dbitmap (if bitmap, the second return value

16
src/lua/bit.cpp
View file

@ -102,7 +102,7 @@ namespace
}
};
function_ptr_luafun lua_print("bit.extract", [](lua_State* LS, const std::string& fname) -> int {
function_ptr_luafun lua_bextract("bit.extract", [](lua_State* LS, const std::string& fname) -> int {
uint64_t num = get_numeric_argument<uint64_t>(LS, 1, fname.c_str());
uint64_t ret = 0;
for(size_t i = 0;; i++) {
@ -119,6 +119,20 @@ namespace
return 1;
});
function_ptr_luafun lua_bvalue("bit.value", [](lua_State* LS, const std::string& fname) -> int {
uint64_t ret = 0;
for(size_t i = 0;; i++) {
if(lua_isnumber(LS, i + 1)) {
uint8_t bit = get_numeric_argument<uint8_t>(LS, i + 1, fname.c_str());
ret |= (1ULL << bit);
} else if(lua_isnil(LS, i + 1)) {
} else
break;
}
lua_pushnumber(LS, ret);
return 1;
});
lua_symmetric_bitwise<combine_none, BITWISE_MASK> bit_none("bit.none");
lua_symmetric_bitwise<combine_none, BITWISE_MASK> bit_bnot("bit.bnot");
lua_symmetric_bitwise<combine_any, 0> bit_any("bit.any");