update

djstdlib/core.cpp

@@ -1,11 +1,20 @@
+#include "os.cpp"
 #include <math.h>
 #include <string.h>
-#include <unistd.h>
 #include "core.h"
-#include "os.cpp"
 #define STB_SPRINTF_IMPLEMENTATION
 #include "vendor/stb_sprintf.h"
 
+void *pushSizeFill(Arena *arena, size_t bytes, byte fill) {
+    if (arena->capacity - arena->head >= bytes) {
+        void *ptr = (char *)arena->memory + arena->head;
+        arena->head += bytes;
+        memset(ptr, fill, bytes);
+        return ptr;
+    }
+    return 0;
+}
+
 void *pushSize(Arena *arena, size_t bytes) {
     if (arena->capacity - arena->head >= bytes) {
         void *ptr = (char *)arena->memory + arena->head;
@@ -112,6 +121,18 @@ const char *cstring(Arena *arena, string str) {
     return arr;
 }
 
+bool strStartsWith(string str, string testStr) {
+    if (str.length < testStr.length) {
+        return false;
+    }
+    for (size_t i = 0; i < testStr.length; i++) {
+        if (str.str[i] != testStr.str[i]) {
+            return false;
+        }
+    }
+    return true;
+}
+
 bool strEql(string s1, string s2) {
     if (s1.length != s2.length) {
         return false;