1 files changed, 77 insertions, 0 deletions
diff --git a/realloc.c b/realloc.c
new file mode 100644
index 0000000..e9aec19
--- /dev/null
+++ b/realloc.c
@@ -0,0 +1,77 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef struct
+{
+    int length;
+    char *line;
+} sNode;
+
+struct String
+{
+    int index;
+    int size;
+    sNode *arr;
+};
+
+struct String *string_new(char *str);
+void string_append(struct String *a, char *b);
+void string_resize(struct String *s);
+
+struct String *string_new(char *str)
+{
+    struct String *ret = (struct String *) calloc(1, sizeof(struct String));
+    ret->arr = (sNode *) calloc(1, (sizeof(sNode) * 200));
+    ret->size = 200;
+    string_append(ret, str);
+
+    return ret;
+}
+
+void string_append(struct String *a, char *b)
+{
+    if ((a->size-1) == a->index)
+        string_resize(a);
+
+    a->arr[a->index].line = b;
+    a->arr[a->index].length = strlen(b);
+    
+    a->index++;
+}
+
+void string_resize(struct String *s)
+{
+    /* quadruple the size */
+    int newSize = s->size * 4;
+    printf("debug: resizing to new size of %d\n", newSize);
+
+    s->size = newSize;
+    sNode *newarr = (sNode *) realloc(s->arr, (sizeof(sNode) * newSize));
+    if (!newarr)
+    {
+        perror("realloc");
+        exit(-1);
+    }
+
+    /* free old array */
+    free(s->arr);
+    s->arr = newarr;
+
+}
+
+int main(int argc, char **argv)
+{
+    if (argc < 2)
+    {
+        fprintf(stderr,"Usage: app n\n");
+        exit(1);
+    }
+
+    struct String *str = string_new("");
+
+    int i;
+    for (i = 0; i < atoi(argv[1]); i++)
+        string_append(str, "anything that can go wrong, will");
+}
+