1 files changed, 39 insertions, 0 deletions
diff --git a/libc/misc/internals/lltostr.c b/libc/misc/internals/lltostr.c
new file mode 100644
index 000000000..2ce359615
--- /dev/null
+++ b/libc/misc/internals/lltostr.c
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2000 Manuel Novoa III
+ *
+ * Note: buf is a pointer to the END of the buffer passed.
+ * Call like this:
+ *     char buf[SIZE], *p;
+ *     p = __lltostr(buf + sizeof(buf) - 1, ...)
+ * For long longs of 64 bits, appropriate buffer sizes are:
+ *     base =  2      66  = 1 (possible -) sign + 64 digits + 1 nul
+ *     base = 10      21  = 1 (possible -) sign + 19 digits + 1 nul
+ *     base = 16      18  = 1 (possible -) sign + 16 hex digits + 1 nul
+ */
+
+extern char *__ulltostr(char *buf, unsigned long long uval, int base, 
+						int uppercase);
+
+char *__lltostr(char *buf, long long val, int base, int uppercase)
+{
+	unsigned long long uval;
+	char *pos;
+    int negative;
+
+	negative = 0;
+    if (val < 0) {
+		negative = 1;
+		uval = ((unsigned long long)(-(1+val))) + 1;
+    } else {
+		uval = val;
+	}
+
+
+    pos = __ulltostr(buf, uval, base, uppercase);
+
+    if (pos && negative) {
+		*--pos = '-';
+    }
+
+    return pos;
+}