add sorter with respecting testcase collections

Makefile

@@ -4,12 +4,15 @@ build: main
 
 test: tester
 
-tester: out/tester.o out/swapper.o
-	gcc $(CFLAGS) out/tester.o out/swapper.o -o tester
+tester: out/tester.o out/sorter.o
+	gcc $(CFLAGS) out/tester.o out/sorter.o -o tester
 
 out/tester.o: out/ src/tester.c
 	gcc $(CFLAGS) -c src/tester.c -o out/tester.o
 
+out/sorter.o: out/ src/sorter.c
+	gcc $(CFLAGS) -c src/sorter.c -o out/sorter.o
+
 out/:
 	mkdir out/
 

inc/sorter.h

@@ -0,0 +1 @@
+void sorter_insertion_sort(char **arr, int size);

src/sorter.c

@@ -0,0 +1,44 @@
+#include <string.h>
+#include "sorter.h"
+
+#define MIN(a, b) ( ((a) < (b)) ? (a) : (b) )
+
+static int lt(char *a, char *b)
+{
+    int len_a = strlen(a);
+    int len_b = strlen(b);
+
+    for (int i = 0; i < MIN(len_a, len_b); i++) {
+        if (a[i] < b[i])
+            return 1;
+        else if (a[i] > b[i])
+            return -1;
+    }
+
+    return (len_a > len_b);
+}
+
+static void swap(char **arr, int x, int y)
+{
+    char *tmp = arr[x];
+    arr[x] = arr[y];
+    arr[y] = tmp;
+}
+
+void sorter_insertion_sort(char **arr, int len)
+{
+    for (int i = 0; i < len-1; i++) {
+        char *min = arr[i];
+        int min_index = i;
+
+        for (int j = i+1; j < len; j++) {
+            if (lt(arr[j], min) == 1) {
+                min_index = j;
+                min = arr[j];
+            }
+        }
+
+        if (min_index != i)
+            swap(arr, i, min_index);
+    }
+}

src/tester.c

@@ -1,12 +1,14 @@
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <unistd.h>
 #include <fcntl.h>
-#include "swapper.h"
+#include "sorter.h"
 
 enum read_state {
     LEN = 0,
-    STR1 = 1,
-    STR2 = 2,
+    ARR1 = 1,
+    ARR2 = 2,
     FINISH = 3,
     IMPOSSIBLE_STATE = 4
 };
@@ -44,30 +46,55 @@ static int read_more(int f, char *buf, int bytes_read)
     return 1024 - bytes_read + new_bytes;
 }
 
-static int parse_case(char *cmd, int *target_length_diff, char *str_a, char *str_b)
+static int parse_case(char *cmd, int *array_size, char ***a, char ***b)
 {
     int bytes_read;
     int write_offset = 0;
+    int array_offset = 0;
     char len_buffer[4] = {0};
     enum read_state rs = LEN;
 
     for (bytes_read = 0; bytes_read < 1024; bytes_read++) {
         switch (cmd[bytes_read]) {
+        case ',':
+            switch (rs) {
+            case ARR1:
+                (*a)[array_offset][write_offset] = '\0';
+                break;
+            case ARR2:
+                (*b)[array_offset][write_offset] = '\0';
+                break;
+            }
+
+            write_offset = 0;
+            array_offset++;
+            break;
+
         case ' ':
             switch (rs) {
             case LEN:
-                *target_length_diff = to_int(len_buffer);
+                *array_size = to_int(len_buffer);
+
+                *a = (char **) malloc(sizeof(char *) * (*array_size));
+                *b = (char **) malloc(sizeof(char *) * (*array_size));
+
+                for (int i = 0; i < *array_size; i++) {
+                    (*a)[i] = malloc(sizeof(char) * 128);
+                    (*b)[i] = malloc(sizeof(char) * 128);
+                }
+
                 break;
-            case STR1:
-                str_a[write_offset] = '\0';
+            case ARR1:
+                (*a)[array_offset][write_offset] = '\0';
                 break;
             }
             rs++;
             write_offset = 0;
+            array_offset = 0;
             break;
 
         case '\n':
-            str_b[write_offset] = '\0';
+            (*b)[array_offset][write_offset] = '\0';
             bytes_read++;
             goto finish;
             break;
@@ -77,11 +104,11 @@ static int parse_case(char *cmd, int *target_length_diff, char *str_a, char *str
             case LEN:
                 len_buffer[write_offset] = cmd[bytes_read];
                 break;
-            case STR1:
-                str_a[write_offset] = cmd[bytes_read];
+            case ARR1:
+                (*a)[array_offset][write_offset] = cmd[bytes_read];
                 break;
-            case STR2:
-                str_b[write_offset] = cmd[bytes_read];
+            case ARR2:
+                (*b)[array_offset][write_offset] = cmd[bytes_read];
                 break;
             }
             write_offset++;
@@ -93,30 +120,90 @@ static int parse_case(char *cmd, int *target_length_diff, char *str_a, char *str
     return bytes_read;
 }
 
-static int assert_length(int test_id, int target_length_diff, char *a, char *b)
+static void destroy_array(char **a, int array_size)
 {
-    int len_diff = swapper_length_difference(a, b);
+    for (int i = 0; i < array_size; i++)
+        free(a[i]);
 
-    if (len_diff == target_length_diff) {
+    free(a);
+}
+
+static int cmp_arrays(int array_size, char **a, char **b)
+{
+    int mismatch_byte = 0;
+
+    for (int i = 0; i < array_size; i++, mismatch_byte++) {
+        int la = strlen(a[i]);
+        int lb = strlen(b[i]);
+
+        if (la != lb)
+            return mismatch_byte;
+
+        for (int j = 0; j < la; j++, mismatch_byte++) {
+            if (a[i][j] != b[i][j])
+                return mismatch_byte;
+        }
+    }
+
+    return -1;
+}
+
+static void print_array(int array_size, char **arr)
+{
+    for (int i = 0; i < array_size; i++)
+        printf("%s ", arr[i]);
+
+    puts("");
+}
+
+static void print_mismatch(int position)
+{
+    for (int i = 0; i < position; i++)
+        fputs(" ", stdout);
+
+    puts("^");
+
+    for (int i = 0; i < position; i++)
+        fputs(" ", stdout);
+
+    puts("sort mismatch");
+}
+
+static int assert_sort(int test_id, int array_size, char **a, char **b)
+{
+    sorter_insertion_sort(a, array_size);
+
+    int result = cmp_arrays(array_size, a, b);
+
+    if (result == -1) {
         printf("[TEST#%02d] OK\r", test_id);
         return 0;
     } else {
         printf("\n[TEST#%02d] FAILED!\n", test_id);
         printf("Case details:\n");
-        printf("Str1: %s\n", a);
-        printf("Str2: %s\n", b);
-        printf("Mismatch: %d expected, %d retrieved\n", target_length_diff, len_diff);
+        printf("Retrieved array: ");
+        print_array(array_size, a);
+
+        printf("Expected  array: ");
+        print_array(array_size, b);
+
+        print_mismatch(result + 17);
+
         return 1;
     }
 }
 
-
-int main(void)
+int main(int argc, char **argv)
 {
     int success_tests_counter = 0;
     int failed_tests_counter = 0;
 
-    int f = open("test/testcases_len", O_RDONLY);
+    int f;
+
+    if (argc == 2)
+        f = open(argv[1], O_RDONLY);
+    else
+        f = open("test/testcases_sort_official", O_RDONLY);
 
     if (f < 0)
         return 1;
@@ -126,16 +213,20 @@ int main(void)
     remaining_buffer_length = read(f, cmd, 1024);
 
     while (remaining_buffer_length) {
-        char str_a[1024], str_b[1024];
-        int target_length_diff;
+        char **a, **b;
+        int array_size;
 
-        int bytes_read = parse_case(cmd, &target_length_diff, str_a, str_b);
+        int bytes_read = parse_case(cmd, &array_size, &a, &b);
         
-        if (assert_length(success_tests_counter + failed_tests_counter + 1, target_length_diff, str_a, str_b))
+        if (assert_sort(success_tests_counter + failed_tests_counter + 1, array_size, a, b))
             failed_tests_counter++;
         else
             success_tests_counter++;
 
+        // clean up before next iteration
+        destroy_array(a, array_size);
+        destroy_array(b, array_size);
+
         if (remaining_buffer_length == 1024)
             remaining_buffer_length = read_more(f, cmd, bytes_read);
         else

test/testcases_sort_custom

@@ -0,0 +1,2 @@
+3 banana,apple,egg apple,banana,egg
+4 banana,test,apple,egg apple,banana,egg,test

test/testcases_sort_official

@@ -0,0 +1,5 @@
+5 banana,apple,cherry,date,elderberry apple,banana,cherry,date,elderberry
+1 hello hello
+3 alpha,beta,gamma alpha,beta,gamma
+3 gamma,beta,alpha alpha,beta,gamma
+8 hello,world,foo,bar,baz,qux,quux,corge bar,baz,corge,foo,hello,quux,qux,world

test/testcases_sort_wrong

@@ -0,0 +1 @@
+3 1,2,3 2,1,3