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add util functions for (x,y) to (file, rank) and vice versa - chess-puzzles - c… |
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git clone git://git.codemadness.org/chess-puzzles |
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--- |
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commit 6af435b4416d90cb27e447e2f0bf505721374e12 |
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parent b7a52ecde26555a060898faaa5643851368c7467 |
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Author: Hiltjo Posthuma <[email protected]> |
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Date: Mon, 25 Dec 2023 18:49:58 +0100 |
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add util functions for (x,y) to (file, rank) and vice versa |
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Diffstat: |
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M fen.c | 46 +++++++++++++++++++++++------… |
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1 file changed, 35 insertions(+), 11 deletions(-) |
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--- |
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diff --git a/fen.c b/fen.c |
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@@ -97,12 +97,36 @@ getpiece(int x, int y) |
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} |
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int |
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+xtofile(int c) |
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+{ |
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+ return 'a' + c; |
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+} |
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+ |
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+int |
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+ytorank(int c) |
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+{ |
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+ return '8' - c; |
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+} |
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+ |
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+int |
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+filetox(int c) |
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+{ |
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+ return c - 'a'; |
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+} |
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+ |
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+int |
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+ranktoy(int c) |
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+{ |
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+ return '8' - c; |
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+} |
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+ |
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+int |
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squaretoxy(const char *s, int *x, int *y) |
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{ |
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if (*s >= 'a' && *s <= 'h' && |
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*(s + 1) >= '1' && *(s + 1) <= '8') { |
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- *x = *s - 'a'; |
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- *y = '8' - *(s + 1); |
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+ *x = filetox(*s); |
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+ *y = ranktoy(*(s + 1)); |
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return 1; |
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} |
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return 0; |
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@@ -153,8 +177,8 @@ showboardfen(void) |
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putchar(' '); |
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if (enpassantsquare[0] != -1 && enpassantsquare[1] != -1) { |
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- putchar('a' + enpassantsquare[0]); |
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- putchar('8' - enpassantsquare[1]); |
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+ putchar(xtofile(enpassantsquare[0])); |
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+ putchar(ytorank(enpassantsquare[1])); |
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} else { |
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putchar('-'); |
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} |
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@@ -277,7 +301,7 @@ output_svg(void) |
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color = highlight[y][x] ? lightsquarehi : ligh… |
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printf("<text x=\"%d\" y=\"%d\" fill=\"#%02x%02x%02x\"… |
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- (ix + 1) * 45 - 2, (iy * 45) + 10, color[0], c… |
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+ (ix + 1) * 45 - 2, (iy * 45) + 10, color[0], c… |
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} |
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iy = 7; |
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y = flipboard ? 0 : 7; |
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@@ -298,7 +322,7 @@ output_svg(void) |
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} |
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printf("<text x=\"%d\" y=\"%d\" fill=\"#%02x%02x%02x\"… |
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- (ix * 45) + 2, (iy + 1) * 45 - 3, color[0], co… |
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+ (ix * 45) + 2, (iy + 1) * 45 - 3, color[0], co… |
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} |
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} |
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@@ -384,7 +408,7 @@ output_tty(void) |
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SETBGCOLOR(color[0], color[1], color[2]); |
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if (showcoords) { |
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fputs("\x1b[97m", stdout); /* bright white */ |
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- putchar('8' - y); |
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+ putchar(ytorank(y)); |
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putchar(' '); |
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} else { |
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fputs(" ", stdout); |
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@@ -455,7 +479,7 @@ output_ascii(void) |
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} |
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if (showcoords) { |
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putchar(' '); |
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- putchar('8' - y); |
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+ putchar(ytorank(y)); |
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} |
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putchar('\n'); |
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} |
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@@ -857,15 +881,15 @@ parsemoves(const char *moves) |
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if (piece != 'p' && piece != 'P') { |
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pgn("%c", toupper(piece)); |
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/* TODO: check ambiguity for certain p… |
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- pgn("%c%c", 'a' + x, '8' - y); |
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+ pgn("%c%c", xtofile(x), ytorank(y)); |
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} |
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if (tookpiece) { |
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/* pawn captures are prefixed by the f… |
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if (piece == 'p' || piece == 'P') |
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- pgn("%c", 'a' + x); |
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+ pgn("%c", xtofile(x)); |
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pgn("x"); |
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} |
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- pgn("%c%c", 'a' + x2, '8' - y2); |
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+ pgn("%c%c", xtofile(x2), ytorank(y2)); |
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/* possible promotion: queen, knight, bishop */ |
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if (*s == 'q' || *s == 'n' || *s == 'b') { |
