d02p02 implemented in c

day-02/src/part02.c

@@ -1,25 +1,164 @@
+#include <ctype.h>
+#include <stdatomic.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 
+#define DEBUG
+
 #ifdef DEBUG
 #define debug_printf(...) do{ fprintf( stderr, __VA_ARGS__ ); } while( 0 )
 #else
 #define debug_printf(...) do{ } while ( 0 )
 #endif
 
-#define LINE_MAX 90
+#define LINE_MAX 160
+#define GAME_MAX 101
+#define GAME_MAX_HANDS 10
+
+
+
+typedef struct Hand {
+  int red;
+  int green;
+  int blue;
+  int set;
+} Hand;
+
+
+typedef struct Game {
+  int id;
+  int num_hands;
+  Hand hands[GAME_MAX_HANDS];
+  Hand min_cubes;
+  int valid;
+} Game;
+
+Game gameArray[GAME_MAX];
+
+Hand bag_limits = {12, 13, 14, 1};
+
+//Takes a game as a param, returns if the game is valid 0 or 1
+int validateGame(Game game, Hand limit){
+  if (game.id == 0) return 0;
+  if (game.num_hands == 0) return 0;
+  for (int i=0; i<game.num_hands; i++){
+    if (game.hands[i].red > limit.red) return 0;
+    if (game.hands[i].green > limit.green) return 0;
+    if (game.hands[i].blue > limit.blue) return 0;
+  }
+  return 1;
+}
+
+//Takes a game as a param, returns hand of min size for inputs
+Hand minCubes(Game game){
+  Hand min = (Hand){0,0,0,0};
+  if (game.id == 0) return min;
+  if (game.num_hands == 0) return min;
+  for (int i=0; i<game.num_hands; i++){
+    if (game.hands[i].red > min.red)  min.red = game.hands[i].red;
+    if (game.hands[i].green > min.green)  min.green = game.hands[i].green;
+    if (game.hands[i].blue > min.blue) min.blue = game.hands[i].blue;
+  }
+  min.set = 1;
+  return min;
+}
+
+void genHandString(char* dest, Game game){
+  int offset = 0;
+  for (int i=0; i<game.num_hands; i++){
+    offset += sprintf(dest+offset, "{r:%02d, g:%02d, b:%02d}, ", game.hands[i].red, game.hands[i].green, game.hands[i].blue);
+  }
+}
+
+
 
 int main(int argc, char *argv[]){
   int linesProcessed = 0;
   char line[LINE_MAX];
+  //debug_printf("size of game: %dbytes\n", (int)sizeof(Game));
   
   while (fgets(line, LINE_MAX, stdin) != NULL) {
+    int game_id;
+    //debug_printf("raw line: %s\n", line);
+    
+    char id_buf[4];
+    int colon_index = (int)(strchr(line, ':') - line);
+    strncpy(id_buf, &line[5], colon_index-5);
+    game_id = atoi(id_buf);
+    //debug_printf("id_buf: -%s-  game_id: %d\n", id_buf, game_id);
+
+    gameArray[linesProcessed] = (Game){game_id, 0, {(Hand){0,0,0,0}}, (Hand){0,0,0,0}, 1};
+
+    char raw_hand_buffer[LINE_MAX];       //make a buffer to hold the rest of the game info for parsing later
+    memset(raw_hand_buffer, '\0', sizeof(raw_hand_buffer));
+    int end_index = (int)(strchr(line, '\n') - line);         //debug_printf("endIndex: %d\n", end_index);
+    strncpy(raw_hand_buffer, &line[colon_index+2], end_index-(colon_index+2));
+    //debug_printf("game_id: %d; raw_hand_buffer: ~~%s~~\n", game_id, raw_hand_buffer);
+    debug_printf("Reconstruct: ~~Game %d: %s~~\n", game_id, raw_hand_buffer);
+
+    int hand_index = 0;
+    char count_buf[10] = "";
+    memset(count_buf, '\0', sizeof(count_buf));
+    for (int i = 0; i<=strlen(raw_hand_buffer); i++){
+      char current_char = raw_hand_buffer[i];
+      //debug_printf("i: %d.%d, hand_index: %d; count_buf:~%s~; current_char: %c\n", i, strlen(raw_hand_buffer), hand_index, count_buf, current_char);
+      if (current_char == ';' || i == strlen(raw_hand_buffer)){
+        memset(count_buf, '\0', sizeof(count_buf));
+        gameArray[linesProcessed].hands[hand_index].set = 1;
+        gameArray[linesProcessed].num_hands = hand_index+1;
+        debug_printf("Commited game %d hand %d: {r:%d g:%d b:%d}\n", game_id, hand_index, gameArray[linesProcessed].hands[hand_index].red, gameArray[linesProcessed].hands[hand_index].green, gameArray[linesProcessed].hands[hand_index].blue);
+        hand_index++;
+      } else if (isdigit(current_char)){
+        strncat(count_buf, &current_char, 1);
+      } else if (isalpha(current_char)){
+        debug_printf("count_buf: %s; setting hand %c: %d\n", count_buf, current_char, atoi(count_buf));
+        if (current_char == 'r'){
+          gameArray[linesProcessed].hands[hand_index].red = atoi(count_buf);
+          i+=2;
+        } else if (current_char == 'g'){
+          gameArray[linesProcessed].hands[hand_index].green = atoi(count_buf);
+          i+=4;
+        } else if (current_char == 'b'){
+          gameArray[linesProcessed].hands[hand_index].blue = atoi(count_buf);
+          i+=3;
+        }
+        memset(count_buf, '\0', sizeof(count_buf));
+      }
+    }
     linesProcessed++;
   }
-  
+  printf("\n Ingested %d Lines\n", linesProcessed);
-  printf("\n Processed %d Lines\n", linesProcessed);
   printf("===================================\n");
-  printf("Answer: \nXXXX\n");
+
+  int gamesProcessed = 0;
+  int sum_of_valid_games = 0;
+  int sum_of_powers_of_min_cubes = 0;
+  for (int i=0; i<100; i++){
+    if (gameArray[i].id != 0){
+      gameArray[i].valid = validateGame(gameArray[i], bag_limits);
+      gameArray[i].min_cubes = minCubes(gameArray[i]);
+
+
+      char hands_stringify[22*GAME_MAX_HANDS];
+      memset(hands_stringify, '\0', sizeof(hands_stringify));
+      genHandString(hands_stringify, gameArray[i]);
+      printf("Game( id=%03d, num_hands=%d, valid=%d, min_cubes={ r:%02d, g:%02d, b:%02d }, hands[]={ %s} )\n", gameArray[i].id, gameArray[i].num_hands, gameArray[i].valid, gameArray[i].min_cubes.red, gameArray[i].min_cubes.green, gameArray[i].min_cubes.blue, hands_stringify);
+
+      if (gameArray[i].valid == 1){
+        sum_of_valid_games+=gameArray[i].id;
+      }
+      if (gameArray[i].min_cubes.set == 1){
+        sum_of_powers_of_min_cubes+=gameArray[i].min_cubes.red*gameArray[i].min_cubes.green*gameArray[i].min_cubes.blue;
+      }
+      gamesProcessed++;
+    }
+  }
+
+  printf("\n Processed %d Games\n", gamesProcessed);
+  printf("===================================\n");
+
+  printf("sum_of_valid_games: \n%d\n", sum_of_valid_games);
+  printf("sum_of_powers_of_min_cubes: \n%d\n", sum_of_powers_of_min_cubes);
 }