Input test.

src/input.c

@@ -8,14 +8,96 @@
 #include "input.h"
 #include "util/memory.h"
 #include "assert/assert.h"
-
-#define INPUT_BIND_MAP_COUNT (sizeof(INPUT_BIND_MAPS) / sizeof(inputbindmap_t))
+#include <fcntl.h>
 
 input_t INPUT;
 
-void inputInit(void) {
-  memoryZero(&INPUT, sizeof(input_t));
+inputmap_t INPUT_MAP[] = {
+  {"w", INPUT_UP},
+  {"s", INPUT_DOWN},
+  {"a", INPUT_LEFT},
+  {"d", INPUT_RIGHT},
+  {" ", INPUT_ACTION},
+  {"e", INPUT_ACTION},
+  {"\n", INPUT_ACTION}, // Enter key
+  {"\x1B", INPUT_CANCEL}, // Escape key
+  {"\033[A", INPUT_UP},    // Up arrow
+  {"\033[B", INPUT_DOWN},  // Down arrow
+  {"\033[C", INPUT_RIGHT}, // Right arrow
+  {"\033[D", INPUT_LEFT},  // Left arrow
+  { 0 }
+};
+
+void inputEnableRawMode() {
+  if (INPUT.isRawMode) return;
+  tcgetattr(STDIN_FILENO, &INPUT.origin);
+  struct termios raw = INPUT.origin;
+  raw.c_lflag &= ~(ICANON | ECHO);
+  tcsetattr(STDIN_FILENO, TCSANOW, &raw);
+  INPUT.isRawMode = 1;
 }
 
-void inputUpdate(void) {
+void inputDisableRawMode() {
+  if(!INPUT.isRawMode) return;
+  tcsetattr(STDIN_FILENO, TCSANOW, &INPUT.origin);
+  INPUT.isRawMode = 0;
+}
+
+void inputSetNonBlocking() {
+  int flags = fcntl(STDIN_FILENO, F_GETFL, 0);
+  fcntl(STDIN_FILENO, F_SETFL, flags | O_NONBLOCK);
+}
+
+void inputInit() {
+  memoryZero(&INPUT, sizeof(input_t));
+
+  inputEnableRawMode();
+  inputSetNonBlocking();
+}
+
+void inputUpdate() {
+  char_t buffer[INPUT_BUFFER_SIZE];
+  ssize_t n = read(STDIN_FILENO, buffer, sizeof(buffer) - 1);
+
+  if(n < 0) {
+    INPUT.previous = INPUT.current;
+    INPUT.current = 0;
+    return;
+  }
+  
+  assertTrue(n < INPUT_BUFFER_SIZE, "Input buffer overflow");
+
+  uint8_t val = 0;
+  inputmap_t *map;
+  uint8_t len;
+  char_t *c;
+  for(uint8_t i = 0; i < n; i++) {
+    map = INPUT_MAP;
+
+    do {
+      len = strlen(map->key);
+
+      if(i + len > n) {
+        map++;
+        continue;
+      }
+
+      c = buffer + i;
+      if(memoryCompare(c, map->key, len) != 0) {
+        map++;
+        continue;
+      }
+
+      // Button was pressed
+      val |= map->value;
+      i += len - 1;
+    } while(map->key);
+  }
+  
+  INPUT.previous = INPUT.current;
+  INPUT.current = val;
+}
+
+void inputDispose() {
+  inputDisableRawMode();
 }