Add dag.c to source control

dag.c

@@ -0,0 +1,46 @@
+#include "libra/dat_container.h"
+#include "libra/dependency_dag.h"
+
+static void ls(const char* input_file);
+static void print_help();
+
+int main(int argc, char** argv) {
+	RA_dat_init();
+	if(argc == 3 && strcmp(argv[1], "list") == 0) {
+		ls(argv[2]);
+	} else {
+		print_help();
+		return 1;
+	}
+}
+
+static void ls(const char* input_file) {
+	RA_Result result;
+
+	u8* data;
+	u32 size;
+	if((result = RA_file_read(&data, &size, input_file)) != RA_SUCCESS) {
+		fprintf(stderr, "Failed to read input file '%s'.\n", input_file);
+		exit(1);
+	}
+
+	RA_DependencyDag dag;
+	if((result = RA_dag_parse(&dag, data, size)) != RA_SUCCESS) {
+		fprintf(stderr, "Failed to parse DAG file '%s' (%s).", input_file, result);
+		exit(1);
+	}
+
+	for(u32 i = 0; i < dag.asset_count; i++) {
+		RA_DependencyDagAsset* asset = &dag.assets[i];
+		printf("%s\n", asset->path);
+	}
+
+	RA_dag_free(&dag, true);
+}
+
+static void print_help() {
+	puts("A utility for working with Insomniac Games Dependency DAG files, such as those used by the PC version of Rift Apart.");
+	puts("");
+	puts("Commands:");
+	puts("  list <input file>");
+}