From 69ab8541a912fcd3bcec9b084dda3b611ab8b9d1 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <sezeroz@gmail.com>
Date: Wed, 26 Sep 2018 10:40:02 +0300
Subject: [PATCH] SDL_vsnprintf: string printer now honors the precision. (bug
 #4263.)

---
 src/stdlib/SDL_string.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/stdlib/SDL_string.c b/src/stdlib/SDL_string.c
index db91a0431..0ba6be74d 100644
--- a/src/stdlib/SDL_string.c
+++ b/src/stdlib/SDL_string.c
@@ -1374,15 +1374,18 @@ static size_t
 SDL_PrintString(char *text, size_t maxlen, SDL_FormatInfo *info, const char *string)
 {
     size_t length = 0;
-    size_t slen;
+    size_t slen, sz;
 
     if (string == NULL) {
         string = "(null)";
     }
 
-    if (info && info->width && (size_t)info->width > SDL_strlen(string)) {
+    sz = SDL_strlen(string);
+    if (info && info->width > 0 && (size_t)info->width > sz) {
         char fill = info->pad_zeroes ? '0' : ' ';
-        size_t width = info->width - SDL_strlen(string);
+        size_t width = info->width - sz;
+        if (info->precision >= 0 && (size_t)info->precision < sz)
+            width += sz - (size_t)info->precision;
         while (width-- > 0 && maxlen > 0) {
             *text++ = fill;
             ++length;
@@ -1394,6 +1397,13 @@ SDL_PrintString(char *text, size_t maxlen, SDL_FormatInfo *info, const char *str
     length += SDL_min(slen, maxlen);
 
     if (info) {
+        if (info->precision >= 0 && info->precision < sz) {
+            slen = info->precision;
+            if (slen < maxlen) {
+                text[slen] = 0;
+                length -= (sz - slen);
+            }
+        }
         if (info->force_case == SDL_CASE_LOWER) {
             SDL_strlwr(text);
         } else if (info->force_case == SDL_CASE_UPPER) {