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* stdio-common/vfscanf.c (memory_error): Remove definition. Add

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some branch prediction hints.
This commit is contained in:
Ulrich Drepper 2006-05-06 06:18:04 +00:00
parent 7bfee65479
commit 694b49cac3
2 changed files with 72 additions and 59 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2006-05-05 Ulrich Drepper <drepper@redhat.com>
* stdio-common/vfscanf.c (memory_error): Remove definition. Add
some branch prediction hints.
* sysdeps/unix/sysv/linux/sparc/bits/fcntl.h: Define SPLICE_F_*.
* sysdeps/unix/sysv/linux/ia64/bits/fcntl.h: Likewise.
* sysdeps/unix/sysv/linux/sh/bits/fcntl.h: Likewise.

128
stdio-common/vfscanf.c
View File

@ -145,11 +145,6 @@
if (done == 0) done = EOF; \
goto errout; \
} while (0)
#define memory_error() do { \
__set_errno (ENOMEM); \
done = EOF; \
goto errout; \
} while (0)
#define ARGCHECK(s, format) \
do \
{ \
@ -355,7 +350,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
do
{
c = inchar ();
if (c == EOF)
if (__builtin_expect (c == EOF, 0))
input_error ();
else if (c != (unsigned char) *f++)
{
@ -383,7 +378,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
c = inchar ();
/* Characters other than format specs must just match. */
if (c == EOF)
if (__builtin_expect (c == EOF, 0))
input_error ();
/* We saw white space char as the last character in the format
@ -391,12 +386,12 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
if (skip_space)
{
while (ISSPACE (c))
if (inchar () == EOF)
if (__builtin_expect (inchar () == EOF, 0))
input_error ();
skip_space = 0;
}
if (c != fc)
if (__builtin_expect (c != fc, 0))
{
ungetc (c, s);
conv_error ();
@ -532,7 +527,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
}
/* End of the format string? */
if (*f == L_('\0'))
if (__builtin_expect (*f == L_('\0'), 0))
conv_error ();
/* Find the conversion specifier. */
@ -544,7 +539,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
int save_errno = errno;
errno = 0;
do
if (inchar () == EOF && errno == EINTR)
if (__builtin_expect (inchar () == EOF && errno == EINTR, 0))
input_error ();
while (ISSPACE (c));
errno = save_errno;
@ -556,9 +551,9 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
{
case L_('%'): /* Must match a literal '%'. */
c = inchar ();
if (c == EOF)
if (__builtin_expect (c == EOF, 0))
input_error ();
if (c != fc)
if (__builtin_expect (c != fc, 0))
{
ungetc_not_eof (c, s);
conv_error ();
@ -624,7 +619,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
}
c = inchar ();
if (c == EOF)
if (__builtin_expect (c == EOF, 0))
input_error ();
if (width == -1)
@ -640,7 +635,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
size_t n;
n = __wcrtomb (!(flags & SUPPRESS) ? str : NULL, c, &state);
if (n == (size_t) -1)
if (__builtin_expect (n == (size_t) -1, 0))
/* No valid wide character. */
input_error ();
@ -675,7 +670,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
}
c = inchar ();
if (c == EOF)
if (__builtin_expect (c == EOF, 0))
input_error ();
#ifdef COMPILE_WSCANF
@ -713,14 +708,14 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
{
/* Possibly correct character, just not enough
input. */
if (inchar () == EOF)
if (__builtin_expect (inchar () == EOF, 0))
encode_error ();
buf[0] = c;
continue;
}
if (n != 1)
if (__builtin_expect (n != 1, 0))
encode_error ();
/* We have a match. */
@ -764,7 +759,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
STRING_ARG (str, char);
c = inchar ();
if (c == EOF)
if (__builtin_expect (c == EOF, 0))
input_error ();
#ifdef COMPILE_WSCANF
@ -827,7 +822,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
n = __wcrtomb (!(flags & SUPPRESS) ? str : NULL, c,
&state);
if (n == (size_t) -1)
if (__builtin_expect (n == (size_t) -1, 0))
encode_error ();
assert (n <= MB_CUR_MAX);
@ -935,7 +930,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
STRING_ARG (wstr, wchar_t);
c = inchar ();
if (c == EOF)
if (__builtin_expect (c == EOF, 0))
input_error ();
#ifndef COMPILE_WSCANF
@ -1010,14 +1005,14 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
{
/* Possibly correct character, just not enough
input. */
if (inchar () == EOF)
if (__builtin_expect (inchar () == EOF, 0))
encode_error ();
buf[0] = c;
continue;
}
if (n != 1)
if (__builtin_expect (n != 1, 0))
encode_error ();
/* We have a match. */
@ -1112,7 +1107,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
number:
c = inchar ();
if (c == EOF)
if (__builtin_expect (c == EOF, 0))
input_error ();
/* Check for a sign. */
@ -1151,7 +1146,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
if (base == 0)
base = 10;
if (base == 10 && (flags & I18N) != 0)
if (base == 10 && __builtin_expect ((flags & I18N) != 0, 0))
{
int from_level;
int to_level;
@ -1511,12 +1506,14 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
{
/* There was no number. If we are supposed to read a pointer
we must recognize "(nil)" as well. */
if (wpsize == 0 && read_pointer && (width < 0 || width >= 0)
&& c == '('
&& TOLOWER (inchar ()) == L_('n')
&& TOLOWER (inchar ()) == L_('i')
&& TOLOWER (inchar ()) == L_('l')
&& inchar () == L_(')'))
if (__builtin_expect (wpsize == 0
&& read_pointer
&& (width < 0 || width >= 0)
&& c == '('
&& TOLOWER (inchar ()) == L_('n')
&& TOLOWER (inchar ()) == L_('i')
&& TOLOWER (inchar ()) == L_('l')
&& inchar () == L_(')'), 1))
/* We must produce the value of a NULL pointer. A single
'0' digit is enough. */
ADDW (L_('0'));
@ -1549,7 +1546,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
else
num.ul = __strtoul_internal (wp, &tw, base, flags & GROUP);
}
if (wp == tw)
if (__builtin_expect (wp == tw, 0))
conv_error ();
if (!(flags & SUPPRESS))
@ -1594,7 +1591,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
case L_('a'):
case L_('A'):
c = inchar ();
if (c == EOF)
if (__builtin_expect (c == EOF, 0))
input_error ();
got_dot = got_e = 0;
@ -1603,14 +1600,14 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
if (c == L_('-') || c == L_('+'))
{
negative = c == L_('-');
if (width == 0 || inchar () == EOF)
if (__builtin_expect (width == 0 || inchar () == EOF, 0))
/* EOF is only an input error before we read any chars. */
conv_error ();
if (! ISDIGIT (c) && TOLOWER (c) != L_('i')
&& TOLOWER (c) != L_('n'))
{
#ifdef COMPILE_WSCANF
if (c != decimal)
if (__builtin_expect (c != decimal, 0))
{
/* This is no valid number. */
ungetc (c, s);
@ -1635,7 +1632,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
break;
}
if (*cmpp != '\0')
if (__builtin_expect (*cmpp != '\0', 0))
{
/* This is no valid number. */
while (1)
@ -1674,12 +1671,16 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
{
/* Maybe "nan". */
ADDW (c);
if (width == 0 || inchar () == EOF || TOLOWER (c) != L_('a'))
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('a'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
if (width == 0 || inchar () == EOF || TOLOWER (c) != L_('n'))
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('n'), 0))
conv_error ();
if (width > 0)
--width;
@ -1691,12 +1692,16 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
{
/* Maybe "inf" or "infinity". */
ADDW (c);
if (width == 0 || inchar () == EOF || TOLOWER (c) != L_('n'))
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('n'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
if (width == 0 || inchar () == EOF || TOLOWER (c) != L_('f'))
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('f'), 0))
conv_error ();
if (width > 0)
--width;
@ -1710,26 +1715,30 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
--width;
/* Now we have to read the rest as well. */
ADDW (c);
if (width == 0 || inchar () == EOF
|| TOLOWER (c) != L_('n'))
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('n'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
if (width == 0 || inchar () == EOF
|| TOLOWER (c) != L_('i'))
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('i'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
if (width == 0 || inchar () == EOF
|| TOLOWER (c) != L_('t'))
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('t'), 0))
conv_error ();
if (width > 0)
--width;
ADDW (c);
if (width == 0 || inchar () == EOF
|| TOLOWER (c) != L_('y'))
if (__builtin_expect (width == 0
|| inchar () == EOF
|| TOLOWER (c) != L_('y'), 0))
conv_error ();
if (width > 0)
--width;
@ -1880,7 +1889,8 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
/* Have we read any character? If we try to read a number
in hexadecimal notation and we have read only the `0x'
prefix or no exponent this is an error. */
if (wpsize == 0 || (is_hexa && (wpsize == 2 || ! got_e)))
if (__builtin_expect (wpsize == 0
|| (is_hexa && (wpsize == 2 || ! got_e)), 0))
conv_error ();
scan_float:
@ -1905,7 +1915,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
*ARG (float *) = negative ? -d : d;
}
if (tw == wp)
if (__builtin_expect (tw == wp, 0))
conv_error ();
if (!(flags & SUPPRESS))
@ -1945,7 +1955,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
while ((fc = *f++) != L'\0' && fc != L']');
if (fc == L'\0')
if (__builtin_expect (fc == L'\0', 0))
conv_error ();
wp = (wchar_t *) f - 1;
#else
@ -1981,7 +1991,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
/* Add the character to the flag map. */
wp[fc] = 1;
if (fc == '\0')
if (__builtin_expect (fc == '\0', 0))
conv_error();
#endif
@ -1989,7 +1999,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
{
size_t now = read_in;
#ifdef COMPILE_WSCANF
if (inchar () == WEOF)
if (__builtin_expect (inchar () == WEOF, 0))
input_error ();
do
@ -2094,7 +2104,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
size_t cnt = 0;
mbstate_t cstate;
if (inchar () == EOF)
if (__builtin_expect (inchar () == EOF, 0))
input_error ();
memset (&cstate, '\0', sizeof (cstate));
@ -2171,13 +2181,13 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
}
while (inchar () != EOF);
if (cnt != 0)
if (__builtin_expect (cnt != 0, 0))
/* We stopped in the middle of recognizing another
character. That's a problem. */
encode_error ();
#endif
if (now == read_in)
if (__builtin_expect (now == read_in, 0))
/* We haven't succesfully read any character. */
conv_error ();
@ -2202,7 +2212,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
{
size_t now = read_in;
if (inchar () == EOF)
if (__builtin_expect (inchar () == EOF, 0))
input_error ();
#ifdef COMPILE_WSCANF
@ -2304,7 +2314,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
}
n = __wcrtomb (!(flags & SUPPRESS) ? str : NULL, c, &state);
if (n == (size_t) -1)
if (__builtin_expect (n == (size_t) -1, 0))
encode_error ();
assert (n <= MB_CUR_MAX);
@ -2361,7 +2371,7 @@ _IO_vfscanf_internal (_IO_FILE *s, const char *format, _IO_va_list argptr,
while (--width > 0 && inchar () != EOF);
#endif
if (now == read_in)
if (__builtin_expect (now == read_in, 0))
/* We haven't succesfully read any character. */
conv_error ();