part 1 day 1 working. Now for 2

day1/Makefile

@@ -0,0 +1,9 @@
+BASENAME= $(shell basename `pwd`)
+
+build:
+	rm $(BASENAME) || echo ""
+	gcc $(BASENAME).c ../libs/* -o $(BASENAME)
+
+run: build
+	./$(BASENAME) input.txt a
+	./$(BASENAME) input.txt b

day1/day1.c

@@ -1,10 +1,21 @@
+#include <ctype.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "../libs/buffered_reader.h"
+#include "../libs/utils.h"
+
+int decodeA(const char *str);
+int decodeB(const char *str);
 
 int main(int argc, char *argv[]) {
+  if (argc < 3) {
+    printf("usage: day1 INPUT_FILE a|b\n");
+    exit(1);
+  }
+
   filelines *lines = flines(argv[1]);
 
   if (lines == NULL) {
@@ -12,9 +23,58 @@ int main(int argc, char *argv[]) {
     exit(1);
   }
 
+  int sum = 0;
   for (int i = 0; i < lines->size; i++) {
-    printf("%s\n", get(lines, i));
+    if (argv[2][0] == 'b') {
+      sum+= decodeB(lines->lines[i]);
+    } else if (argv[2][0] == 'a') {
+		sum += decodeA(lines->lines[i]);
+	}
   }
 
+  printf("%d\n", sum);
+
   return 0;
 }
+
+int decodeA(const char *str) {
+  int tens = -1;
+  int ones = -1;
+  int len = strlen(str);
+
+  for (int i = 0; i < len; i++) {
+    int front = str[i];
+    int back = str[len - 1 - i];
+
+    if (!isalpha(front) && tens < 0) {
+      tens = front - 48;
+    }
+    if (!isalpha(back) && ones < 0) {
+      ones = back - 48;
+    }
+    printf("front %c, tens %d, back %d, ones %d\n", front, tens, back, ones);
+  }
+
+  return tens * 10 + ones;
+}
+
+int decodeB(const char *str) {
+  int tens = -1;
+  int ones = -1;
+  int len = strlen(str);
+
+  for (int i = 0; i < len; i++) {
+    int front = str[i];
+    int back = str[len - 1 - i];
+
+    if (!isalpha(front) && tens < 0) {
+      tens = front - 48;
+    }
+    if (!isalpha(back) && ones < 0) {
+      ones = back - 48;
+    }
+    printf("front %c, tens %d, back %d, ones %d\n", front, tens, back, ones);
+  }
+
+  return tens * 10 + ones;
+}

day1/out.txt

@@ -0,0 +1,6 @@
+rm day1 || echo ""
+gcc day1.c ../libs/* -o day1
+./day1 input.txt a
+53194
+./day1 input.txt b
+53706

day1/testb.txt

@@ -0,0 +1 @@
+eightwothree

libs/buffered_reader.c

@@ -13,7 +13,7 @@ filelines* flines(const char* filename) {
   //Define loop things
   bool loop = true;
   char *buffer;
-  size_t bufsize = 128;
+  size_t bufsize = 8;
   size_t characters;
 
   filelines *lines;
@@ -23,21 +23,29 @@ filelines* flines(const char* filename) {
   //loop over file
   if (file) {
     while (loop) {
-		buffer = (char *)malloc(bufsize * sizeof(char));
+		int size = bufsize;
+		buffer = (char *)malloc(size * sizeof(char));
 
 		int i = 0;
 		while((c = getc(file)) != EOF) {
-			if (c == '\n' || i == bufsize) {
-				printf("breaking\n");
+			if (c == '\n') {
 				break;
 			}
 
+			if (i == size) {
+				size <<= 1;
+				buffer = (char*)realloc(buffer, size * sizeof(char));
+			}
+
 			//TODO: resize string if input is too big
-			printf("Adding %d\n", c);
 			buffer[i] = c;
 			i += 1;
 		}
 		if (i > 0){
+			if (i == size) {
+				buffer = (char*)realloc(buffer, size * sizeof(char) + 1);
+			}
+			buffer[i] = '\0';
 			insert(lines, buffer);
 		}
 		if (c == EOF) {

libs/data_structures.h

@@ -0,0 +1,20 @@
+#ifndef data_structures
+
+#include <stdlib.h>
+
+typedef struct {
+	size_t size;
+	size_t capacity;
+	size_t head;
+	size_t tail;
+	char* arr;
+}list;
+
+void initList(list **l);
+void pushs(list *l, char c);
+char pops(list *l);
+void enqueue(list *l, char c);
+char dequeue(list *l);
+
+#endif
+

libs/utils.c

@@ -0,0 +1,20 @@
+#include "utils.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+char *strreplace(char *s, const char *s1, const char *s2) {
+    char *p = strstr(s, s1);
+	while (p != NULL){
+        size_t len1 = strlen(s1);
+        size_t len2 = strlen(s2);
+        if (len1 != len2){
+            memmove(p + len2, p + len1, strlen(p + len1) + 1);
+		}
+        memcpy(p, s2, len2);
+		p = strstr(s, s1);
+	}
+    return s;
+}
+

libs/utils.h

@@ -0,0 +1,6 @@
+#ifndef utils
+
+
+char *strreplace(char *s, const char *s1, const char *s2);
+
+#endif