From c7fbbfd600f929505181d938a2bcdfc6bd50aa07 Mon Sep 17 00:00:00 2001
From: Vedran Grudenic <grudenic.vedran@gmail.com>
Date: Sun, 20 Jan 2019 23:14:51 +0100
Subject: patch for issue #40 (Digit missing from negative numbers in certain
 cases)

---
 printf.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

(limited to 'printf.c')

diff --git a/printf.c b/printf.c
index c9a1175..7df2290 100644
--- a/printf.c
+++ b/printf.c
@@ -178,6 +178,9 @@ static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t ma
 
   // pad leading zeros
   if (!(flags & FLAGS_LEFT)) {
+    if (width && (flags & FLAGS_ZEROPAD) && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) {
+      width--;
+    }
     while ((len < prec) && (len < PRINTF_NTOA_BUFFER_SIZE)) {
       buf[len++] = '0';
     }
@@ -208,10 +211,6 @@ static size_t _ntoa_format(out_fct_type out, char* buffer, size_t idx, size_t ma
     }
   }
 
-  // handle sign
-  if (len && (len == width) && (negative || (flags & FLAGS_PLUS) || (flags & FLAGS_SPACE))) {
-    len--;
-  }
   if (len < PRINTF_NTOA_BUFFER_SIZE) {
     if (negative) {
       buf[len++] = '-';
@@ -395,15 +394,14 @@ static size_t _ftoa(out_fct_type out, char* buffer, size_t idx, size_t maxlen, d
 
   // pad leading zeros
   if (!(flags & FLAGS_LEFT) && (flags & FLAGS_ZEROPAD)) {
+    if (width && (negative || (flags & (FLAGS_PLUS | FLAGS_SPACE)))) {
+      width--;
+    }
     while ((len < width) && (len < PRINTF_FTOA_BUFFER_SIZE)) {
       buf[len++] = '0';
     }
   }
 
-  // handle sign
-  if ((len == width) && (negative || (flags & FLAGS_PLUS) || (flags & FLAGS_SPACE))) {
-    len--;
-  }
   if (len < PRINTF_FTOA_BUFFER_SIZE) {
     if (negative) {
       buf[len++] = '-';
-- 
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