add string type

include/lstring.h

@@ -0,0 +1,60 @@
+#ifndef LTYPES_STRING_H
+#define LTYPES_STRING_H
+
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_STRING_LEN 1024
+
+typedef struct {
+    char* buf;
+    size_t len;
+} LString;
+
+LString* l_string_new(const char* fmt, ...);
+void l_string_delete(LString* str);
+int l_string_cmp(LString* strA, LString* strB);
+LString* l_string_concat(LString* strA, LString* strB);
+
+#ifdef L_STRING_IMPLEMENTATION
+
+#include <stdarg.h>
+
+LString* l_string_new(const char* fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+
+    char temp_string[MAX_STRING_LEN];
+    vsnprintf(temp_string, MAX_STRING_LEN, fmt, args);
+
+    va_end(args);
+
+    LString* str = calloc(1, sizeof(LString));
+    str->len = strlen(temp_string);
+
+    str->buf = malloc(str->len + 1);
+    if (str->buf != NULL) {
+        strcpy(str->buf, temp_string);
+    }
+
+    return str;
+}
+
+void l_string_delete(LString* str) {
+    free(str);
+}
+
+int l_string_cmp(LString* strA, LString* strB) {
+    int num_chars = (strA->len <= strB->len) ? strB->len : strA->len;
+    return strncmp(strA->buf, strB->buf, num_chars);
+}
+
+LString* l_string_concat(LString* strA, LString* strB) {
+    return l_string_new("%.*s%.*s", strA->len, strA->buf, strB->len, strB->buf);
+}
+
+#endif
+
+#endif