Ciao Vincent,
15 dic 2023, 13:26 da vinc...@vinc17.net:
> Note that there are similar issues in printf/repl-vsnprintf.c, and I
>
I finally had the time to examine the code and test it. I attach a proposed
patch.
I changed the 3 files: printf/doprntf.c, printf/repl-vsnprintf.c,
printf/sprintffuns.c, to use the returned value of the called functions,
instead of calling strlen on the string.
I also slightly changed the tests, to check at least one case with "%c", 0.
For this to work I also had to change a
- (*__gmp_free_func) (got, strlen(got)+1);
+ (*__gmp_free_func) (got, got_len+1);
When the string comes from a generic print, it is safer to relay on the return
value than on the length computed by strlen()...
> think that this is the cause of the MPFR failure with MS Visual C++
> (vsnprintf is used by gmp_vasprintf).
>
If you can also test on that side, let me know. Thanks!
Gis,
m
diff -r 1c566525476a printf/doprntf.c
--- a/printf/doprntf.c Wed Dec 27 19:35:36 2023 +0100
+++ b/printf/doprntf.c Sun Feb 18 12:17:18 2024 +0100
@@ -267,8 +267,7 @@
mean truncation */
ASSERT (explen >= 0 && explen < sizeof(exponent)-1);
#else
- sprintf (exponent, p->expfmt, expsign, expval);
- explen = strlen (exponent);
+ explen = sprintf (exponent, p->expfmt, expsign, expval);
ASSERT (explen < sizeof(exponent));
#endif
TRACE (printf (" expfmt %s gives %s\n", p->expfmt, exponent));
diff -r 1c566525476a printf/repl-vsnprintf.c
--- a/printf/repl-vsnprintf.c Wed Dec 27 19:35:36 2023 +0100
+++ b/printf/repl-vsnprintf.c Sun Feb 18 12:17:18 2024 +0100
@@ -364,16 +364,14 @@
if (total_width <= buf_size)
{
- vsprintf (buf, orig_fmt, orig_ap);
- len = strlen (buf);
+ len = vsprintf (buf, orig_fmt, orig_ap);
}
else
{
char *s;
s = __GMP_ALLOCATE_FUNC_TYPE (total_width, char);
- vsprintf (s, orig_fmt, orig_ap);
- len = strlen (s);
+ len = vsprintf (s, orig_fmt, orig_ap);
if (buf_size != 0)
{
size_t copylen = MIN (len, buf_size-1);
diff -r 1c566525476a printf/sprintffuns.c
--- a/printf/sprintffuns.c Wed Dec 27 19:35:36 2023 +0100
+++ b/printf/sprintffuns.c Sun Feb 18 12:17:18 2024 +0100
@@ -53,9 +53,9 @@
{
char *buf = *bufp;
int ret;
- vsprintf (buf, fmt, ap);
- ret = strlen (buf);
- *bufp = buf + ret;
+ ret = vsprintf (buf, fmt, ap);
+ if (ret > 0)
+ *bufp = buf + ret;
return ret;
}
diff -r 1c566525476a tests/misc/t-printf.c
--- a/tests/misc/t-printf.c Wed Dec 27 19:35:36 2023 +0100
+++ b/tests/misc/t-printf.c Sun Feb 18 12:17:18 2024 +0100
@@ -128,12 +128,11 @@
}
void
-check_vsprintf (const char *want, const char *fmt, va_list ap)
+check_vsprintf (const char *want, int want_len, const char *fmt, va_list ap)
{
char got[MAX_OUTPUT];
- int got_len, want_len;
+ int got_len;
- want_len = strlen (want);
got_len = gmp_vsprintf (got, fmt, ap);
if (got_len != want_len || strcmp (got, want) != 0)
@@ -149,14 +148,12 @@
}
void
-check_vfprintf (const char *want, const char *fmt, va_list ap)
+check_vfprintf (const char *want, int want_len, const char *fmt, va_list ap)
{
char got[MAX_OUTPUT];
- int got_len, want_len, fread_len;
+ int got_len, fread_len;
long ftell_len;
- want_len = strlen (want);
-
rewind (check_vfprintf_fp);
got_len = gmp_vfprintf (check_vfprintf_fp, fmt, ap);
ASSERT_ALWAYS (got_len != -1);
@@ -187,14 +184,12 @@
}
void
-check_vsnprintf (const char *want, const char *fmt, va_list ap)
+check_vsnprintf (const char *want, int want_len, const char *fmt, va_list ap)
{
char got[MAX_OUTPUT+1];
- int ret, got_len, want_len;
+ int ret, got_len;
size_t bufsize;
- want_len = strlen (want);
-
bufsize = -1;
for (;;)
{
@@ -243,12 +238,11 @@
}
void
-check_vasprintf (const char *want, const char *fmt, va_list ap)
+check_vasprintf (const char *want, int want_len, const char *fmt, va_list ap)
{
char *got;
- int got_len, want_len;
+ int got_len;
- want_len = strlen (want);
got_len = gmp_vasprintf (&got, fmt, ap);
if (got_len != want_len || strcmp (got, want) != 0)
@@ -261,19 +255,17 @@
printf (" want_len %d\n", want_len);
abort ();
}
- (*__gmp_free_func) (got, strlen(got)+1);
+ (*__gmp_free_func) (got, got_len+1);
}
void
-check_obstack_vprintf (const char *want, const char *fmt, va_list ap)
+check_obstack_vprintf (const char *want, int want_len, const char *fmt, va_list ap)
{
#if HAVE_OBSTACK_VPRINTF
struct obstack ob;
- int got_len, want_len, ob_len;
+ int got_len, ob_len;
char *got;
- want_len = strlen (want);
-
obstack_init (&ob);
got_len = gmp_obstack_vprintf (&ob, fmt, ap);
got = (char *) obstack_base (&ob);
@@ -300,15 +292,30 @@
void
check_one (const char *want, const char *fmt, ...)
{
+ int want_len = strlen (want);
va_list ap;
va_start (ap, fmt);
/* simplest first */
- check_vsprintf (want, fmt, ap);
- check_vfprintf (want, fmt, ap);
- check_vsnprintf (want, fmt, ap);
- check_vasprintf (want, fmt, ap);
- check_obstack_vprintf (want, fmt, ap);
+ check_vsprintf (want, want_len, fmt, ap);
+ check_vfprintf (want, want_len, fmt, ap);
+ check_vsnprintf (want, want_len, fmt, ap);
+ check_vasprintf (want, want_len, fmt, ap);
+ check_obstack_vprintf (want, want_len, fmt, ap);
+}
+
+void
+check_one_len (const char *want, int want_len, const char *fmt, ...)
+{
+ va_list ap;
+ va_start (ap, fmt);
+
+ /* simplest first */
+ check_vsprintf (want, want_len, fmt, ap);
+ check_vfprintf (want, want_len, fmt, ap);
+ check_vsnprintf (want, want_len, fmt, ap);
+ check_vasprintf (want, want_len, fmt, ap);
+ check_obstack_vprintf (want, want_len, fmt, ap);
}
@@ -854,17 +861,16 @@
check_misc (void)
{
mpz_t z;
- mpf_t f;
mpz_init (z);
- mpf_init2 (f, 128L);
check_one ("!", "%c", '!');
check_one ("hello world", "hello %s", "world");
check_one ("hello:", "%s:", "hello");
mpz_set_ui (z, 0L);
- check_one ("hello0", "%s%Zd", "hello", z, z);
+ check_one ("hello0", "%s%Zd", "hello", z);
+ check_one_len ("!0\0.", 4, "%c%Zd%c.", '!', z, 0);
{
static char xs[801];
@@ -927,7 +933,6 @@
#endif
mpz_clear (z);
- mpf_clear (f);
}
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