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authorUlrich Drepper <drepper@redhat.com>2007-01-22 16:18:03 +0000
committerUlrich Drepper <drepper@redhat.com>2007-01-22 16:18:03 +0000
commit6cae39579b699d09b94a315483a9ac804b56fe34 (patch)
tree25e1ae56c925aac9ee267ca7626d9aa860a10604 /stdio-common
parent439201dea2b759359eba24dd9458b4a2ef55bfac (diff)
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[BZ #3902]
2007-01-22  Ulrich Drepper  <drepper@redhat.com>
	[BZ #3902]
	* stdio-common/_itoa.c (_itoa): Make sure at least a zero is emitted.
	* stdio-common/Makefile (tests): Add bug17.
	* stdio-common/bug17.c: New file.
Diffstat (limited to 'stdio-common')
-rw-r--r--stdio-common/Makefile4
-rw-r--r--stdio-common/_itoa.c5
-rw-r--r--stdio-common/bug17.c31
3 files changed, 37 insertions, 3 deletions
diff --git a/stdio-common/Makefile b/stdio-common/Makefile
index 37bcdb3bc8..98220550f4 100644
--- a/stdio-common/Makefile
+++ b/stdio-common/Makefile
@@ -1,4 +1,4 @@
-# Copyright (C) 1991-2002,2003,2004,2005,2006 Free Software Foundation, Inc.
+# Copyright (C) 1991-2006, 2007 Free Software Foundation, Inc.
 # This file is part of the GNU C Library.
 
 # The GNU C Library is free software; you can redistribute it and/or
@@ -54,7 +54,7 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
 	 tst-swprintf tst-fseek tst-fmemopen test-vfprintf tst-gets \
 	 tst-perror tst-sprintf tst-rndseek tst-fdopen tst-fphex bug14 bug15 \
 	 tst-popen tst-unlockedio tst-fmemopen2 tst-put-error tst-fgets \
-	 tst-fwrite bug16
+	 tst-fwrite bug16 bug17
 
 test-srcs = tst-unbputc tst-printf
 
diff --git a/stdio-common/_itoa.c b/stdio-common/_itoa.c
index f61b23fceb..285fde2ab9 100644
--- a/stdio-common/_itoa.c
+++ b/stdio-common/_itoa.c
@@ -1,5 +1,5 @@
 /* Internal function for converting integers to ASCII.
-   Copyright (C) 1994, 1995, 1996, 1999, 2000, 2002, 2003, 2004
+   Copyright (C) 1994, 1995, 1996, 1999, 2000, 2002, 2003, 2004, 2007
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Torbjorn Granlund <tege@matematik.su.se>
@@ -269,6 +269,7 @@ _itoa (value, buflim, base, upper_case)
 
     default:
       {
+	char *bufend = buflim;
 #if BITS_PER_MP_LIMB == 64
 	mp_limb_t base_multiplier = brec->base_multiplier;
 	if (brec->flag)
@@ -454,6 +455,8 @@ _itoa (value, buflim, base, upper_case)
 	  }
 	while (n != 0);
 #endif
+	if (buflim == bufend)
+	  *--buflim = '0';
       }
       break;
     }
diff --git a/stdio-common/bug17.c b/stdio-common/bug17.c
new file mode 100644
index 0000000000..2ef398674b
--- /dev/null
+++ b/stdio-common/bug17.c
@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <string.h>
+
+static int
+do_test (void)
+{
+  static const char expect[] = "0, 0, 0";
+  char buf[100];
+  int status = 0;
+
+  static const char fmt1[] = "%0d, %0ld, %0lld";
+  snprintf (buf, sizeof (buf), fmt1, 0, 0L, 0LL);
+  if (strcmp (buf, expect) != 0)
+    {
+      printf ("\"%s\": got \"%s\", expected \"%s\"\n", fmt1, buf, expect);
+      status = 1;
+    }
+
+  static const char fmt2[] = "%0u, %0lu, %0llu";
+  snprintf (buf, sizeof (buf), fmt2, 0u, 0uL, 0uLL);
+  if (strcmp (buf, expect) != 0)
+    {
+      printf ("\"%s\": got \"%s\", expected \"%s\"\n", fmt2, buf, expect);
+      status = 1;
+    }
+
+  return status;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"