i did a lot

1 files changed, 65 insertions, 0 deletions

diff --git a/src/utils.c b/src/utils.c
new file mode 100644
index 0000000..fdc6aea
--- /dev/null
+++ b/src/utils.c
@@ -0,0 +1,65 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "types.h"
+#include "voxel.h"
+#include "utils.h"
+
+char *read_file(const char *filename)
+{
+	FILE *file;
+	long length, read;
+	char *buffer;
+
+	file = fopen(filename, "r");
+	if (file == NULL) {
+		ERROR("could not read file: %s", filename);
+		return NULL;
+	}
+
+	fseek(file, 0, SEEK_END);
+	length = ftell(file);
+	fseek(file, 0, SEEK_SET);
+
+	buffer = malloc(length + 1);
+	read = fread(buffer, 1, length, file);
+	buffer[length] = 0;
+
+	if (read < length) {
+		ERROR("could not read file: %s", filename);
+		free(buffer);
+		return NULL;
+	}
+
+	fclose(file);
+	return buffer;
+}
+
+_Noreturn void die(void)
+{
+	exit(1);
+}
+
+void *xalloc(usize size)
+{
+	void *ptr = malloc(size);
+	if (ptr == NULL && size != 0)
+		die();
+	return ptr;
+}
+
+void *xrealloc(void *ptr, usize size)
+{
+	ptr = realloc(ptr, size);
+	if (ptr == NULL && size != 0)
+		die();
+	return ptr;
+}
+
+void *xzalloc(usize size)
+{
+	void *ptr = xalloc(size);
+	memset(ptr, 0, size);
+	return ptr;
+}