Create simple wire solve executable

cli/CMakeLists.txt

@@ -2,8 +2,10 @@ ADD_EXECUTABLE(password_solve password_solve.c)
 ADD_EXECUTABLE(morse_code_solve morse_code_solve.c)
 ADD_EXECUTABLE(maze_solve maze_solve.c)
 ADD_EXECUTABLE(who_first_solve who_first_solve.c)
+ADD_EXECUTABLE(simple_wire_solve simple_wire_solve.c)
 
 target_link_libraries(password_solve PRIVATE lib_password_solve)
 target_link_libraries(morse_code_solve PRIVATE lib_morse_code_solve)
 target_link_libraries(maze_solve PRIVATE lib_maze_solve)
 target_link_libraries(who_first_solve PRIVATE lib_who_first_solve)
+target_link_libraries(simple_wire_solve PRIVATE lib_simple_wire_solve)

cli/simple_wire_solve.c

@@ -0,0 +1,75 @@
+#include <stdio.h>
+#include <ctype.h>
+#include <string.h>
+
+#include "lib_simple_wire_solve.h"
+
+int main(int argc, char **argv) 
+{ 
+   if(argc > 3 || argc < 2) {
+     return 1;
+   }
+
+   char * wire_str = argv[1];
+
+   uint8_t wire_length = strnlen(wire_str, 6);
+
+   if(wire_length < 3 || wire_length > 6) {
+     return 2;
+   }
+
+   enum simple_wire_colours wires[wire_length];
+   for(uint8_t i  = 0; i < wire_length; i++) {
+     switch(tolower(wire_str[i])) {
+        case 'r':
+          wires[i] = C_Red;
+          break;
+        case 'w':
+          wires[i] = C_White;
+          break;
+        case 'y':
+          wires[i] = C_Yellow;
+          break;
+        case 'b':
+          wires[i] = C_Blue;
+          break;
+        case 'l':
+          wires[i] = C_Black;
+          break;
+        default :
+          return 3;
+     }
+   }
+
+   enum simple_wire_error_code error;
+   uint8_t result;
+   if(argc == 2) {
+     error = simple_wire_solve_no_serial(
+       wires,
+       wire_length,
+       &result
+     );
+   } else {
+      char * serial_number_str = argv[2];
+      if(strnlen(serial_number_str, 1) != 1) {
+        return 4;
+      }
+      char serial_number_digit = serial_number_str[0];
+      if(!isdigit(serial_number_digit)) {
+        return 5;
+      }
+      error = simple_wire_solve(
+        wires,
+        wire_length,
+        serial_number_digit - '0',
+        &result
+      );
+   }
+   if(error != E_None) {
+     return 10 + error;
+   } else {
+     printf("%i\n", result);
+   }
+
+   return 0;
+}

lib/simple_wire_solve.c

@@ -62,7 +62,7 @@ static uint8_t solve_5_wire(
   const uint8_t last_serial_number_digit) {
   set_wire_counts(wire_counts, wires, 5);
   if(wires[4] == C_Black && is_odd(last_serial_number_digit)) {
-    return 4;
+    return 3;
   } else if(wire_counts[C_Red] == 1 && wire_counts[C_Yellow] > 1) {
     return 0;
   } else if(wire_counts[C_Black] == 0) {