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* [newlib-cygwin] Revert "Don't overread or write memory returned by _DTOA_R"
@ 2017-06-19 10:57 Corinna Vinschen
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From: Corinna Vinschen @ 2017-06-19 10:57 UTC (permalink / raw)
To: newlib-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=14ea06212bc7e585024c80b6084455559da3d22f
commit 14ea06212bc7e585024c80b6084455559da3d22f
Author: Corinna Vinschen <corinna@vinschen.de>
Date: Mon Jun 19 12:57:16 2017 +0200
Revert "Don't overread or write memory returned by _DTOA_R"
This reverts commit efaef1bba263501e1e7264833ddfc9b8c20f9ebc.
Diff:
---
newlib/libc/stdio/vfwprintf.c | 25 ++++++++++++-------------
1 file changed, 12 insertions(+), 13 deletions(-)
diff --git a/newlib/libc/stdio/vfwprintf.c b/newlib/libc/stdio/vfwprintf.c
index f0872fd..4786ed6 100644
--- a/newlib/libc/stdio/vfwprintf.c
+++ b/newlib/libc/stdio/vfwprintf.c
@@ -1631,18 +1631,12 @@ wcvt(struct _reent *data, _PRINTF_FLOAT_TYPE value, int ndigits, int flags,
{
char *digits, *bp, *rve;
+#ifndef _MB_CAPABLE
int i;
+#endif
digits = _DTOA_R (data, value, mode, ndigits, decpt, &dsgn, &rve);
-#ifdef _MB_CAPABLE
- _mbsnrtowcs_r (data, buf, (const char **) &digits, rve - digits,
- len, NULL);
-#else
- for (i = 0; i < rve - digits && i < len; ++i)
- buf[i] = (wchar_t) digits[i];
-#endif
-
if ((ch != L'g' && ch != L'G') || flags & ALT) { /* Print trailing zeros */
bp = digits + ndigits;
if (ch == L'f' || ch == L'F') {
@@ -1652,13 +1646,18 @@ wcvt(struct _reent *data, _PRINTF_FLOAT_TYPE value, int ndigits, int flags,
}
if (value == 0) /* kludge for __dtoa irregularity */
rve = bp;
-
- for (i = rve - digits; i < bp - digits && i < len; ++i)
- buf[i] = L'0';
-
- rve = rve > bp ? rve : bp;
+ while (rve < bp)
+ *rve++ = '0';
}
+
*length = rve - digits; /* full length of the string */
+#ifdef _MB_CAPABLE
+ _mbsnrtowcs_r (data, buf, (const char **) &digits, *length,
+ len, NULL);
+#else
+ for (i = 0; i < *length && i < len; ++i)
+ buf[i] = (wchar_t) digits[i];
+#endif
return buf;
}
}
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