read a file

1 files changed, 46 insertions, 0 deletions

diff --git a/src/util.cpp b/src/util.cpp
new file mode 100644
index 0000000000..15cc6caab4
--- /dev/null
+++ b/src/util.cpp
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2015 Andrew Kelley
+ *
+ * This file is part of zig, which is MIT licensed.
+ * See http://opensource.org/licenses/MIT
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+#include "util.hpp"
+
+void zig_panic(const char *format, ...) {
+    va_list ap;
+    va_start(ap, format);
+    vfprintf(stderr, format, ap);
+    fprintf(stderr, "\n");
+    va_end(ap);
+    abort();
+}
+
+char *zig_alloc_sprintf(int *len, const char *format, ...) {
+    va_list ap, ap2;
+    va_start(ap, format);
+    va_copy(ap2, ap);
+
+    int len1 = vsnprintf(nullptr, 0, format, ap);
+    assert(len1 >= 0);
+
+    size_t required_size = len1 + 1;
+    char *mem = allocate<char>(required_size);
+    if (!mem)
+        return nullptr;
+
+    int len2 = vsnprintf(mem, required_size, format, ap2);
+    assert(len2 == len1);
+
+    va_end(ap2);
+    va_end(ap);
+
+    if (len)
+        *len = len1;
+    return mem;
+}
+