+2023-05-03 Bruno Haible <bruno@clisp.org>
+
+ vasnprintf: Make '0' flag handling more ISO C compliant.
+ * lib/vasnprintf.c (VASNPRINTF): When doing the padding ourselves,
+ ignore the '0' flag if a precision is specified and the conversion is
+ one of d, i, o, u, x, X, b, B.
+
2023-05-01 Paul Eggert <eggert@cs.ucla.edu>
extern-inline: port to pcc
#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
size_t width;
#endif
-#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || NEED_PRINTF_UNBOUNDED_PRECISION
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
int has_precision;
size_t precision;
#endif
width = xsum (xtimes (width, 10), *digitp++ - '0');
while (digitp != dp->width_end);
}
-#if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
+# if !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
has_width = 1;
-#endif
+# endif
}
#endif
-#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || NEED_PRINTF_UNBOUNDED_PRECISION
+#if !USE_SNPRINTF || !HAVE_SNPRINTF_RETVAL_C99 || USE_MSVC__SNPRINTF || !DCHAR_IS_TCHAR || ENABLE_UNISTDIO || NEED_PRINTF_FLAG_LEFTADJUST || NEED_PRINTF_FLAG_ZERO || NEED_PRINTF_UNBOUNDED_PRECISION
has_precision = 0;
precision = 6;
if (dp->precision_start != dp->precision_end)
for (; pad > 0; pad--)
*p++ = ' ';
}
- else if ((flags & FLAG_ZERO) && pad_ptr != NULL)
+ else if ((flags & FLAG_ZERO) && pad_ptr != NULL
+ /* ISO C says: "For d, i, o, u, x, and X
+ conversions, if a precision is
+ specified, the 0 flag is ignored. */
+ && !(has_precision
+ && (dp->conversion == 'd'
+ || dp->conversion == 'i'
+ || dp->conversion == 'o'
+ || dp->conversion == 'u'
+ || dp->conversion == 'x'
+ || dp->conversion == 'X'
+ /* Although ISO C does not
+ require it, treat 'b' and 'B'
+ like 'x' and 'X'. */
+ || dp->conversion == 'b'
+ || dp->conversion == 'B')))
{
/* Pad with zeroes. */
DCHAR_T *q = end;