From 4aaeea028cba3c93b3d62063f07d94681af9791c Mon Sep 17 00:00:00 2001
From: Luke Dashjr <luke-jr+git@utopios.org>
Date: Sun, 3 Jun 2018 22:07:53 +0000
Subject: [PATCH] Avoid ssize_t type, since it is POSIX-specific

Only j could become negative, so we simply check before it would
---
 base58.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/base58.c b/base58.c
index 33566e0..810ebbe 100644
--- a/base58.c
+++ b/base58.c
@@ -15,7 +15,6 @@
 #include <stddef.h>
 #include <stdint.h>
 #include <string.h>
-#include <sys/types.h>
 
 #include "libbase58.h"
 
@@ -146,7 +145,7 @@ bool b58enc(char *b58, size_t *b58sz, const void *data, size_t binsz)
 {
 	const uint8_t *bin = data;
 	int carry;
-	ssize_t i, j, high, zcount = 0;
+	size_t i, j, high, zcount = 0;
 	size_t size;
 	
 	while (zcount < binsz && !bin[zcount])
@@ -163,6 +162,10 @@ bool b58enc(char *b58, size_t *b58sz, const void *data, size_t binsz)
 			carry += 256 * buf[j];
 			buf[j] = carry % 58;
 			carry /= 58;
+			if (!j) {
+				// Otherwise j wraps to maxint which is > high
+				break;
+			}
 		}
 	}