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-rw-r--r--stdio-common/vfscanf.c224
1 files changed, 166 insertions, 58 deletions
diff --git a/stdio-common/vfscanf.c b/stdio-common/vfscanf.c
index a778346287..a3c058495e 100644
--- a/stdio-common/vfscanf.c
+++ b/stdio-common/vfscanf.c
@@ -34,23 +34,79 @@ Cambridge, MA 02139, USA. */
#define LONGLONG long
#endif
-
-#define inchar() ((c = getc(s)) == EOF ? EOF : (++read_in, c))
-#define conv_error() return (ungetc(c, s), done)
-#define input_error() return (done == 0 ? EOF : done)
-#define memory_error() return ((errno = ENOMEM), EOF)
+#ifdef USE_IN_LIBIO
+# include <libioP.h>
+# include <libio.h>
+
+/* Those are flags in the conversion format. */
+# define LONG 0x01 /* l: long or double */
+# define LONGDBL 0x02 /* L: long long or long double */
+# define SHORT 0x04 /* h: short */
+# define SUPPRESS 0x08 /* suppress assignment */
+# define POINTER 0x10 /* weird %p pointer (`fake hex') */
+# define NOSKIP 0x20 /* do not skip blanks */
+# define WIDTH 0x40 /* width */
+
+
+# define va_list _IO_va_list
+# define ungetc(c, s) _IO_ungetc (c, s)
+# define inchar() ((c = _IO_getc(s)), ++read_in, c)
+# define conv_error() return ((errp != NULL && (*errp |= 2)), \
+ (c == EOF || _IO_ungetc(c, s)), done)
+
+# define input_error() return ((errp != NULL && (*errp |= 1)), \
+ done == 0 ? EOF : done)
+# define memory_error() return ((errno = ENOMEM), EOF)
+# define ARGCHECK(s, format) \
+ do \
+ { \
+ /* Check file argument for consistence. */ \
+ CHECK_FILE (s, -1); \
+ if (s->_flags & _IO_NO_READS || format == NULL) \
+ { \
+ MAYBE_SET_EINVAL; \
+ return -1; \
+ } \
+ } while (0)
+#else
+# define inchar() ((c = getc(s)) == EOF ? EOF : (++read_in, c))
+# define conv_error() return (ungetc(c, s), done)
+# define input_error() return (done == 0 ? EOF : done)
+# define memory_error() return ((errno = ENOMEM), EOF)
+# define ARGCHECK(s, format) \
+ do \
+ { \
+ /* Check file argument for consistence. */ \
+ if (!__validfp (s) || !s->__mode.__read || format == NULL) \
+ { \
+ errno = EINVAL; \
+ return -1; \
+ } \
+ } while (0)
+#endif
/* Read formatted input from S according to the format string
FORMAT, using the argument list in ARG.
Return the number of assignments made, or -1 for an input error. */
+#ifdef USE_IN_LIBIO
int
-DEFUN(__vfscanf, (s, format, arg),
- FILE *s AND CONST char *format AND va_list argptr)
+_IO_vfscanf (s, format, argptr, errp)
+ _IO_FILE *s;
+ const char *format;
+ _IO_va_list argptr;
+ int *errp;
+#else
+int
+__vfscanf (s, format, arg)
+ FILE *s;
+ const char *format;
+ va_list argptr;
+#endif
{
va_list arg = (va_list) argptr;
- register CONST char *f = format;
+ register const char *f = format;
register char fc; /* Current character of the format. */
register size_t done = 0; /* Assignments done. */
register size_t read_in = 0; /* Chars read in. */
@@ -58,14 +114,17 @@ DEFUN(__vfscanf, (s, format, arg),
register int do_assign; /* Whether to do an assignment. */
register int width; /* Maximum field width. */
int group_flag; /* %' modifier flag. */
+#ifdef USE_IN_LIBIO
+ int flags; /* Trace flags for current format element. */
+#endif
/* Type modifiers. */
int is_short, is_long, is_long_double;
#ifdef HAVE_LONGLONG
/* We use the `L' modifier for `long long int'. */
-#define is_longlong is_long_double
+# define is_longlong is_long_double
#else
-#define is_longlong 0
+# define is_longlong 0
#endif
int malloc_string; /* Args are char ** to be filled in. */
/* Status for reading F-P nums. */
@@ -92,18 +151,14 @@ DEFUN(__vfscanf, (s, format, arg),
char *w; /* Pointer into WORK. */
wchar_t decimal; /* Decimal point character. */
- if (!__validfp(s) || !s->__mode.__read || format == NULL)
- {
- errno = EINVAL;
- return EOF;
- }
+ ARGCHECK (s, format);
/* Figure out the decimal point character. */
if (mbtowc (&decimal, _NL_CURRENT (LC_NUMERIC, DECIMAL_POINT),
strlen (_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT))) <= 0)
decimal = (wchar_t) *_NL_CURRENT (LC_NUMERIC, DECIMAL_POINT);
- c = inchar();
+ c = inchar ();
/* Run through the format string. */
while (*f != '\0')
@@ -112,27 +167,38 @@ DEFUN(__vfscanf, (s, format, arg),
/* Extract the next argument, which is of type TYPE.
For a %N$... spec, this is the Nth argument from the beginning;
otherwise it is the next argument after the state now in ARG. */
-#define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
+#if 0
+ /* XXX Possible optimization. */
+# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
+ ({ va_list arg = (va_list) argptr; \
+ arg = (va_list) ((char *) arg \
+ + (argpos - 1) \
+ * __va_rounded_size (void *)); \
+ va_arg (arg, type); \
+ }))
+#else
+# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
({ unsigned int pos = argpos; \
va_list arg = (va_list) argptr; \
while (--pos > 0) \
(void) va_arg (arg, void *); \
va_arg (arg, type); \
}))
+#endif
if (!isascii (*f))
{
/* Non-ASCII, may be a multibyte. */
- int len = mblen (f, strlen(f));
+ int len = mblen (f, strlen (f));
if (len > 0)
{
while (len-- > 0)
if (c == EOF)
- input_error();
+ input_error ();
else if (c == *f++)
- (void) inchar();
+ (void) inchar ();
else
- conv_error();
+ conv_error ();
continue;
}
}
@@ -142,8 +208,8 @@ DEFUN(__vfscanf, (s, format, arg),
{
/* Characters other than format specs must just match. */
if (c == EOF)
- input_error();
- if (isspace(fc))
+ input_error ();
+ if (isspace (fc))
{
/* Whitespace characters match any amount of whitespace. */
while (isspace (c))
@@ -151,12 +217,17 @@ DEFUN(__vfscanf, (s, format, arg),
continue;
}
else if (c == fc)
- (void) inchar();
+ (void) inchar ();
else
- conv_error();
+ conv_error ();
continue;
}
+#ifdef USE_IN_LIBIO
+ /* That is the start of the coversion string. */
+ flags = 0;
+#endif
+
/* Initialize state of modifiers. */
argpos = 0;
do_assign = 1;
@@ -185,6 +256,9 @@ DEFUN(__vfscanf, (s, format, arg),
switch (*f++)
{
case '*':
+#ifdef USE_IN_LIBIO
+ flags = SUPPRESS;
+#endif
do_assign = 0;
break;
case '\'':
@@ -192,9 +266,15 @@ DEFUN(__vfscanf, (s, format, arg),
break;
}
+#ifdef USE_IN_LIBIO
+ /* We have seen width. */
+ if (isdigit (*f))
+ flags |= WIDTH;
+#endif
+
/* Find the maximum field width. */
width = 0;
- while (isdigit(*f))
+ while (isdigit (*f))
{
width *= 10;
width += *f++ - '0';
@@ -209,19 +289,44 @@ DEFUN(__vfscanf, (s, format, arg),
{
case 'h':
/* int's are short int's. */
+#ifdef USE_IN_LIBIO
+ if (flags & ~(SUPPRESS | WIDTH))
+ /* Signal illegal format element. */
+ conv_error ();
+ flags |= SHORT;
+#endif
is_short = 1;
break;
case 'l':
if (is_long)
- /* A double `l' is equivalent to an `L'. */
- is_longlong = 1;
+ {
+ /* A double `l' is equivalent to an `L'. */
+#ifdef USE_IN_LIBIO
+ if ((flags & ~(SUPPRESS | WIDTH)) && (flags & LONGDBL))
+ conv_error ();
+ flags &= ~LONG;
+ flags |= LONGDBL;
+#endif
+ is_longlong = 1;
+ }
else
- /* int's are long int's. */
- is_long = 1;
+ {
+ /* int's are long int's. */
+#ifdef USE_IN_LIBIO
+ flags |= LONG;
+#endif
+ is_long = 1;
+ }
break;
case 'q':
case 'L':
/* double's are long double's, and int's are long long int's. */
+#ifdef USE_IN_LIBIO
+ if (flags & ~(SUPPRESS | WIDTH))
+ /* Signal illegal format element. */
+ conv_error ();
+ flags |= LONGDBL;
+#endif
is_long_double = 1;
break;
case 'a':
@@ -233,20 +338,20 @@ DEFUN(__vfscanf, (s, format, arg),
/* End of the format string? */
if (*f == '\0')
- conv_error();
+ conv_error ();
/* Find the conversion specifier. */
w = work;
fc = *f++;
if (fc != '[' && fc != 'c' && fc != 'n')
/* Eat whitespace. */
- while (isspace(c))
- (void) inchar();
+ while (isspace (c))
+ (void) inchar ();
switch (fc)
{
case '%': /* Must match a literal '%'. */
if (c != fc)
- conv_error();
+ conv_error ();
break;
case 'n': /* Answer number of assignments done. */
@@ -263,7 +368,7 @@ DEFUN(__vfscanf, (s, format, arg),
}
if (c == EOF)
- input_error();
+ input_error ();
if (width == -1)
width = 1;
@@ -272,10 +377,10 @@ DEFUN(__vfscanf, (s, format, arg),
{
do
*str++ = c;
- while (inchar() != EOF && --width > 0);
+ while (inchar () != EOF && --width > 0);
}
else
- while (inchar() != EOF && --width > 0);
+ while (inchar () != EOF && --width > 0);
if (do_assign)
++done;
@@ -289,7 +394,7 @@ DEFUN(__vfscanf, (s, format, arg),
if (malloc_string) \
{ \
/* The string is to be stored in a malloc'd buffer. */ \
- strptr = ARG (char **); \
+ strptr = ARG (char **); \
if (strptr == NULL) \
conv_error (); \
/* Allocate an initial buffer. */ \
@@ -297,7 +402,7 @@ DEFUN(__vfscanf, (s, format, arg),
*strptr = str = malloc (strsize); \
} \
else \
- str = ARG (char *); \
+ str = ARG (char *); \
if (str == NULL) \
conv_error (); \
}
@@ -357,7 +462,7 @@ DEFUN(__vfscanf, (s, format, arg),
break;
case 'x': /* Hexadecimal integer. */
- case 'X': /* Ditto. */
+ case 'X': /* Ditto. */
base = 16;
number_signed = 0;
goto number;
@@ -383,7 +488,7 @@ DEFUN(__vfscanf, (s, format, arg),
number:
if (c == EOF)
- input_error();
+ input_error ();
/* Check for a sign. */
if (c == '-' || c == '+')
@@ -391,7 +496,7 @@ DEFUN(__vfscanf, (s, format, arg),
*w++ = c;
if (width > 0)
--width;
- (void) inchar();
+ (void) inchar ();
}
/* Look for a leading indication of base. */
@@ -401,9 +506,9 @@ DEFUN(__vfscanf, (s, format, arg),
--width;
*w++ = '0';
- (void) inchar();
+ (void) inchar ();
- if (tolower(c) == 'x')
+ if (tolower (c) == 'x')
{
if (base == 0)
base = 16;
@@ -411,7 +516,7 @@ DEFUN(__vfscanf, (s, format, arg),
{
if (width > 0)
--width;
- (void) inchar();
+ (void) inchar ();
}
}
else if (base == 0)
@@ -422,21 +527,21 @@ DEFUN(__vfscanf, (s, format, arg),
base = 10;
/* Read the number into WORK. */
- while (width != 0 && c != EOF)
+ do
{
- if (base == 16 ? !isxdigit(c) :
- (!isdigit(c) || c - '0' >= base))
+ if (base == 16 ? !isxdigit (c) :
+ (!isdigit (c) || c - '0' >= base))
break;
*w++ = c;
if (width > 0)
--width;
- (void) inchar ();
}
+ while (inchar () != EOF && width != 0);
if (w == work ||
(w - work == 1 && (work[0] == '+' || work[0] == '-')))
/* There was no number. */
- conv_error();
+ conv_error ();
/* Convert the number. */
*w = '\0';
@@ -492,15 +597,15 @@ DEFUN(__vfscanf, (s, format, arg),
case 'g':
case 'G':
if (c == EOF)
- input_error();
+ input_error ();
/* Check for a sign. */
if (c == '-' || c == '+')
{
*w++ = c;
- if (inchar() == EOF)
+ if (inchar () == EOF)
/* EOF is only an input error before we read any chars. */
- conv_error();
+ conv_error ();
if (width > 0)
--width;
}
@@ -508,11 +613,11 @@ DEFUN(__vfscanf, (s, format, arg),
got_dot = got_e = 0;
do
{
- if (isdigit(c))
+ if (isdigit (c))
*w++ = c;
else if (got_e && w[-1] == 'e' && (c == '-' || c == '+'))
*w++ = c;
- else if (!got_e && tolower(c) == 'e')
+ else if (!got_e && tolower (c) == 'e')
{
*w++ = 'e';
got_e = got_dot = 1;
@@ -526,12 +631,12 @@ DEFUN(__vfscanf, (s, format, arg),
break;
if (width > 0)
--width;
- } while (inchar() != EOF && width != 0);
+ } while (inchar () != EOF && width != 0);
if (w == work)
conv_error();
if (w[-1] == '-' || w[-1] == '+' || w[-1] == 'e')
- conv_error();
+ conv_error ();
/* Convert the number. */
*w = '\0';
@@ -614,11 +719,14 @@ DEFUN(__vfscanf, (s, format, arg),
base = 16;
/* A PTR must be the same size as a `long int'. */
is_long = 1;
+ number_signed = 0;
goto number;
}
}
- conv_error();
+ return ((c == EOF || ungetc (c, s)), done);
}
+#ifndef USE_IN_LIBIO
weak_alias (__vfscanf, vfscanf)
+#endif