small code-cleanup and add some comments - chess-puzzles - chess puzzle book generator
(HTM) git clone git://git.codemadness.org/chess-puzzles
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(DIR) Files
(DIR) Refs
(DIR) README
(DIR) LICENSE
---
(DIR) commit df3a95f12df8a701ed0ad5997be6ad5c3f840bda
(DIR) parent da65c61271ad6e8eb3fde5a8e828ed4d2c882fb2
(HTM) Author: Hiltjo Posthuma <hiltjo@codemadness.org>
Date: Mon, 8 Jan 2024 21:50:26 +0100
small code-cleanup and add some comments
Diffstat:
M fen.c | 53 +++++++++++++++++--------------
1 file changed, 30 insertions(+), 23 deletions(-)
---
(DIR) diff --git a/fen.c b/fen.c
@@ -15,19 +15,20 @@
#define SETFGCOLOR(r,g,b) printf("\x1b[38;2;%d;%d;%dm", r, g, b)
#define SETBGCOLOR(r,g,b) printf("\x1b[48;2;%d;%d;%dm", r, g, b)
-enum outputmode { ModeInvalid = 0, ModeASCII, ModeCGI, ModeFEN, ModePGN, ModeTTY, ModeSVG, ModeSpeak };
-enum outputmode outputmode = ModeSVG;
+enum outputmode { ModeInvalid = 0, ModeASCII, ModeCGI, ModeFEN, ModePGN,
+ ModeTTY, ModeSVG, ModeSpeak };
+enum outputmode outputmode = ModeSVG; /* default is SVG */
static int onlylastmove = 0, silent = 0, dutchmode = 0;
/* localization of letter for PGN pieces */
const char *pgn_piecemapping = "";
-typedef unsigned char Color;
+typedef unsigned char Color; /* for RGB: 0-255 */
struct theme {
const char *name;
- /* RGB */
+ /* RGB values */
Color border[3];
Color darksquare[3];
Color lightsquare[3];
@@ -60,7 +61,7 @@ struct theme themes[] = {
.lightsquarecheck = { 0xff, 0x6a, 0x6a },
.darksquarecheck = { 0xff, 0x3a, 0x3a }
},
-/* greyscale theme, highlight is still green */
+/* greyscale theme, highlight is still green though */
{
.name = "grey",
.border = { 0x00, 0x00, 0x00 },
@@ -88,9 +89,7 @@ struct board {
int flipboard; /* flip board ? default: 0 */
int showcoords; /* board coordinates? default: 1 */
-
- /* board theme */
- struct theme *theme;
+ struct theme *theme; /* board theme */
};
/* set theme by name */
@@ -108,11 +107,12 @@ board_set_theme(struct board *b, const char *name)
return NULL;
}
+/* initialize board and set sane defaults */
void
board_init(struct board *b)
{
memset(b, 0, sizeof(*b)); /* zero fields by default */
- b->side_to_move = 'w';
+ b->side_to_move = 'w'; /* white */
b->enpassantsquare[0] = -1; /* no en passant */
b->enpassantsquare[1] = -1;
b->movenumber = 1;
@@ -121,6 +121,7 @@ board_init(struct board *b)
b->theme = &themes[0]; /* use first theme as default */
}
+/* copy entire board and its state */
void
board_copy(struct board *bd, struct board *bs)
{
@@ -191,6 +192,7 @@ squaretoxy(const char *s, int *x, int *y)
return 0;
}
+/* write formatted string, only if output mode is ModePGN */
void
pgn(const char *fmt, ...)
{
@@ -204,6 +206,20 @@ pgn(const char *fmt, ...)
va_end(ap);
}
+/* write formatted string, only if output mode is ModeSpeak */
+void
+speak(const char *fmt, ...)
+{
+ va_list ap;
+
+ if (outputmode != ModeSpeak || silent)
+ return;
+
+ va_start(ap, fmt);
+ vprintf(fmt, ap);
+ va_end(ap);
+}
+
/* remap letter for PGN pieces, default: "KQRBN"
Dutch: (K)oning, (D)ame, (T)oren, (L)oper, (P)aard: "KDTLP" */
int
@@ -227,19 +243,6 @@ pgnpiece(int piece)
}
void
-speak(const char *fmt, ...)
-{
- va_list ap;
-
- if (outputmode != ModeSpeak || silent)
- return;
-
- va_start(ap, fmt);
- vprintf(fmt, ap);
- va_end(ap);
-}
-
-void
speakpiece(int piece)
{
switch (piece) {
@@ -764,6 +767,8 @@ isincheck(struct board *b, int side)
return 0;
}
+/* copy the board state and try the piece move, see if the piece wouldn't put
+ the ourself in check */
int
trypiecemove(struct board *b, int side, int piece,
int x1, int y1, int x2, int y2, int px, int py)
@@ -1406,7 +1411,9 @@ board_playmoves(struct board *b, const char *moves)
void
usage(char *argv0)
{
- fprintf(stderr, "usage: %s [-cCfF] [-l] [-m mapping] [-o ascii|fen|pgn|speak|svg|tty] [-t default|green|grey] [FEN] [moves]\n", argv0);
+ fprintf(stderr, "usage: %s [-cCfF] [-l] [-m mapping] "
+ "[-o ascii|fen|pgn|speak|svg|tty] [-t default|green|grey] "
+ "[FEN] [moves]\n", argv0);
exit(1);
}