Change entity collection strategy

src/build.c

@@ -0,0 +1,83 @@
+typedef struct BuildContext {
+	String ODIN_OS;      // target operating system
+	String ODIN_ARCH;    // target architecture
+	String ODIN_VENDOR;  // compiler vendor
+	String ODIN_VERSION; // compiler version
+	String ODIN_ROOT;    // Odin ROOT
+
+	i64    word_size;
+	i64    max_align;
+	String llc_flags;
+	String link_flags;
+} BuildContext;
+
+String odin_root_dir(void) {
+	String path = global_module_path;
+	Array(wchar_t) path_buf;
+	isize len, i;
+	gbTempArenaMemory tmp;
+	wchar_t *text;
+
+	if (global_module_path_set) {
+		return global_module_path;
+	}
+
+	array_init_count(&path_buf, heap_allocator(), 300);
+
+	len = 0;
+	for (;;) {
+		len = GetModuleFileNameW(NULL, &path_buf.e[0], path_buf.count);
+		if (len == 0) {
+			return make_string(NULL, 0);
+		}
+		if (len < path_buf.count) {
+			break;
+		}
+		array_resize(&path_buf, 2*path_buf.count + 300);
+	}
+
+	tmp = gb_temp_arena_memory_begin(&string_buffer_arena);
+
+	text = gb_alloc_array(string_buffer_allocator, wchar_t, len+1);
+
+	GetModuleFileNameW(NULL, text, len);
+	path = string16_to_string(heap_allocator(), make_string16(text, len));
+	for (i = path.len-1; i >= 0; i--) {
+		u8 c = path.text[i];
+		if (c == '/' || c == '\\') {
+			break;
+		}
+		path.len--;
+	}
+
+	global_module_path = path;
+	global_module_path_set = true;
+
+	gb_temp_arena_memory_end(tmp);
+
+	array_free(&path_buf);
+
+	return path;
+}
+
+
+void init_build_context(BuildContext *bc) {
+	bc->ODIN_OS      = str_lit("windows");
+	bc->ODIN_ARCH    = str_lit("amd64");
+	bc->ODIN_VENDOR  = str_lit("odin");
+	bc->ODIN_VERSION = str_lit("0.0.3d");
+	bc->ODIN_ROOT    = odin_root_dir();
+
+
+	if (str_eq(bc->ODIN_ARCH, str_lit("amd64"))) {
+		bc->word_size = 8;
+		bc->max_align = 16;
+		bc->llc_flags = str_lit("-march=x86-64 ");
+		bc->link_flags = str_lit("/machine:x64 ");
+	} else if (str_eq(bc->ODIN_ARCH, str_lit("x86"))) {
+		bc->word_size = 4;
+		bc->max_align = 8;
+		bc->llc_flags = str_lit("-march=x86 ");
+		bc->link_flags = str_lit("/machine:x86 ");
+	}
+}