# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1480623791 -3600
# Node ID 77890dd7214eeda3868eeaab4f5cea4e830f4b90
# Parent  436d7832ca668981de36b898881695cd8d4d5c30
Fixed log10 call when handling negative inputs.

diff -r 436d7832ca66 -r 77890dd7214e templates/native.c
--- a/templates/native.c	Thu Dec 01 19:48:31 2016 +0100
+++ b/templates/native.c	Thu Dec 01 21:23:11 2016 +0100
@@ -1,4 +1,4 @@
-#include <stdlib.h> /* exit */
+#include <stdlib.h> /* abs, exit */
 #include <unistd.h> /* read, write */
 #include <math.h>   /* ceil, log10, pow */
 #include <string.h> /* strcmp, strncpy, strlen */
@@ -281,7 +281,7 @@
     __attr * const self = &__args[1];
     /* self.__data__ interpreted as int */
     int i = __load_via_object(self->value, __pos___data__).intvalue;
-    int n = i != 0 ? (int) ceil(log10(i+1)) + 1 : 2;
+    int n = i != 0 ? (int) ceil(log10(abs(i)+1)) + 1 : 2;
     char *s = (char *) __ALLOCATE(n, sizeof(char));
 
     if (i < 0) n++;