From 4d5958f78c5741031f552b26cd0cb1da5fdab18d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ra=C3=BAl=20Benencia?= <rul@kalgan.cc>
Date: Sat, 28 Mar 2015 12:15:30 -0300
Subject: add a Coord type and init functions

---
 include/coordinate.h | 12 ++++++++++++
 include/types.h      |  5 +++++
 lib/coordinate.c     | 31 +++++++++++++++++++++++++++++++
 3 files changed, 48 insertions(+)
 create mode 100644 include/coordinate.h
 create mode 100644 lib/coordinate.c

diff --git a/include/coordinate.h b/include/coordinate.h
new file mode 100644
index 0000000..52e7cf0
--- /dev/null
+++ b/include/coordinate.h
@@ -0,0 +1,12 @@
+#ifndef _COORD
+#define _COORD
+
+#include "types.h"
+
+/*
+ * This functions will NOT alloc memory for the Coord pointer
+ */
+int coord_init(Coord*, char, char);
+int coord_init_from_str(Coord*, char*);
+
+#endif
diff --git a/include/types.h b/include/types.h
index 7618916..07e63d3 100644
--- a/include/types.h
+++ b/include/types.h
@@ -6,6 +6,11 @@
 typedef enum {WHITE, BLACK} Color;
 typedef enum {PAWN, ROCK, KNIGHT, BISHOP, QUEEN, KING} PieceType;
 
+typedef struct {
+    char row;
+    char col;
+} Coord;
+
 typedef struct {
     Color color;
     PieceType type;
diff --git a/lib/coordinate.c b/lib/coordinate.c
new file mode 100644
index 0000000..2dc0215
--- /dev/null
+++ b/lib/coordinate.c
@@ -0,0 +1,31 @@
+#include <ctype.h>
+#include <string.h>
+
+#include "coordinate.h"
+
+static int _valid_coord(char col, char row) {
+    if (col >= 'a' && col <= 'h' && row >= '1' && row <= '8')
+        return 0;
+
+    return 1;
+}
+
+int coord_init(Coord* c, char col, char row) {
+    char lower_col = tolower(col);
+    char lower_row = tolower(row);
+
+    if (! _valid_coord(lower_col, lower_row))
+        return 1;
+
+    c->row = row;
+    c->col = col;
+
+    return 0;        
+}
+
+int coord_init_from_str(Coord* c, char* s) {
+    if (strlen(s) != 2)
+        return 1;
+
+    return coord_init(c, s[0], s[1]);
+}
-- 
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