733 lines
17 KiB
C
733 lines
17 KiB
C
/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If
|
|
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#include <ansidecl.h>
|
|
#include "../locale/localeinfo.h"
|
|
#include <errno.h>
|
|
#include <limits.h>
|
|
#include <ctype.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
|
|
#ifdef __GNUC__
|
|
#define HAVE_LONGLONG
|
|
#define LONGLONG long long
|
|
#else
|
|
#define LONGLONG long
|
|
#endif
|
|
|
|
#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
|
|
_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 char fc; /* Current character of the format. */
|
|
register size_t done = 0; /* Assignments done. */
|
|
register size_t read_in = 0; /* Chars read in. */
|
|
register int c; /* Last char read. */
|
|
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
|
|
#else
|
|
# define is_longlong 0
|
|
#endif
|
|
int malloc_string; /* Args are char ** to be filled in. */
|
|
/* Status for reading F-P nums. */
|
|
char got_dot, got_e;
|
|
/* If a [...] is a [^...]. */
|
|
char not_in;
|
|
/* Base for integral numbers. */
|
|
int base;
|
|
/* Signedness for integral numbers. */
|
|
int number_signed;
|
|
/* Integral holding variables. */
|
|
union
|
|
{
|
|
long long int q;
|
|
unsigned long long int uq;
|
|
long int l;
|
|
unsigned long int ul;
|
|
} num;
|
|
/* Character-buffer pointer. */
|
|
register char *str, **strptr;
|
|
size_t strsize;
|
|
/* Workspace. */
|
|
char work[200];
|
|
char *w; /* Pointer into WORK. */
|
|
wchar_t decimal; /* Decimal point character. */
|
|
|
|
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 ();
|
|
|
|
/* Run through the format string. */
|
|
while (*f != '\0')
|
|
{
|
|
unsigned int argpos;
|
|
/* Extract the next argument, which is of type TYPE.
|
|
For a %N$... spec, this is the Nth argument from the beginning;
|
|
otherwise it is the next argument after the state now in ARG. */
|
|
#if 0
|
|
/* XXX Possible optimization. */
|
|
# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
|
|
({ va_list arg = (va_list) argptr; \
|
|
arg = (va_list) ((char *) arg \
|
|
+ (argpos - 1) \
|
|
* __va_rounded_size (void *)); \
|
|
va_arg (arg, type); \
|
|
}))
|
|
#else
|
|
# define ARG(type) (argpos == 0 ? va_arg (arg, type) : \
|
|
({ unsigned int pos = argpos; \
|
|
va_list arg = (va_list) argptr; \
|
|
while (--pos > 0) \
|
|
(void) va_arg (arg, void *); \
|
|
va_arg (arg, type); \
|
|
}))
|
|
#endif
|
|
|
|
if (!isascii (*f))
|
|
{
|
|
/* Non-ASCII, may be a multibyte. */
|
|
int len = mblen (f, strlen (f));
|
|
if (len > 0)
|
|
{
|
|
while (len-- > 0)
|
|
if (c == EOF)
|
|
input_error ();
|
|
else if (c == *f++)
|
|
(void) inchar ();
|
|
else
|
|
conv_error ();
|
|
continue;
|
|
}
|
|
}
|
|
|
|
fc = *f++;
|
|
if (fc != '%')
|
|
{
|
|
/* Characters other than format specs must just match. */
|
|
if (c == EOF)
|
|
input_error ();
|
|
if (isspace (fc))
|
|
{
|
|
/* Whitespace characters match any amount of whitespace. */
|
|
while (isspace (c))
|
|
inchar ();
|
|
continue;
|
|
}
|
|
else if (c == fc)
|
|
(void) inchar ();
|
|
else
|
|
conv_error ();
|
|
continue;
|
|
}
|
|
|
|
#ifdef USE_IN_LIBIO
|
|
/* That is the start of the coversion string. */
|
|
flags = 0;
|
|
#endif
|
|
|
|
/* Initialize state of modifiers. */
|
|
argpos = 0;
|
|
do_assign = 1;
|
|
group_flag = 0;
|
|
is_short = is_long = is_long_double = malloc_string = 0;
|
|
|
|
/* Check for a positional parameter specification. */
|
|
if (isdigit (*f))
|
|
{
|
|
argpos = *f++ - '0';
|
|
while (isdigit (*f))
|
|
argpos = argpos * 10 + (*f++ - '0');
|
|
if (*f == '$')
|
|
++f;
|
|
else
|
|
{
|
|
/* Oops; that was actually the field width. */
|
|
width = argpos;
|
|
argpos = 0;
|
|
goto got_width;
|
|
}
|
|
}
|
|
|
|
/* Check for the assignment-suppressant and the number grouping flag. */
|
|
while (*f == '*' || *f == '\'')
|
|
switch (*f++)
|
|
{
|
|
case '*':
|
|
#ifdef USE_IN_LIBIO
|
|
flags = SUPPRESS;
|
|
#endif
|
|
do_assign = 0;
|
|
break;
|
|
case '\'':
|
|
group_flag = 1;
|
|
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))
|
|
{
|
|
width *= 10;
|
|
width += *f++ - '0';
|
|
}
|
|
got_width:
|
|
if (width == 0)
|
|
width = -1;
|
|
|
|
/* Check for type modifiers. */
|
|
while (*f == 'h' || *f == 'l' || *f == 'L' || *f == 'a' || *f == 'q')
|
|
switch (*f++)
|
|
{
|
|
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'. */
|
|
#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. */
|
|
#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':
|
|
/* String conversions (%s, %[) take a `char **'
|
|
arg and fill it in with a malloc'd pointer. */
|
|
malloc_string = 1;
|
|
break;
|
|
}
|
|
|
|
/* End of the format string? */
|
|
if (*f == '\0')
|
|
conv_error ();
|
|
|
|
/* Find the conversion specifier. */
|
|
w = work;
|
|
fc = *f++;
|
|
if (fc != '[' && fc != 'c' && fc != 'n')
|
|
/* Eat whitespace. */
|
|
while (isspace (c))
|
|
(void) inchar ();
|
|
switch (fc)
|
|
{
|
|
case '%': /* Must match a literal '%'. */
|
|
if (c != fc)
|
|
conv_error ();
|
|
break;
|
|
|
|
case 'n': /* Answer number of assignments done. */
|
|
if (do_assign)
|
|
*ARG (int *) = read_in - 1; /* Don't count the read-ahead. */
|
|
break;
|
|
|
|
case 'c': /* Match characters. */
|
|
if (do_assign)
|
|
{
|
|
str = ARG (char *);
|
|
if (str == NULL)
|
|
conv_error ();
|
|
}
|
|
|
|
if (c == EOF)
|
|
input_error ();
|
|
|
|
if (width == -1)
|
|
width = 1;
|
|
|
|
if (do_assign)
|
|
{
|
|
do
|
|
*str++ = c;
|
|
while (inchar () != EOF && --width > 0);
|
|
}
|
|
else
|
|
while (inchar () != EOF && --width > 0);
|
|
|
|
if (do_assign)
|
|
++done;
|
|
|
|
break;
|
|
|
|
case 's': /* Read a string. */
|
|
#define STRING_ARG \
|
|
if (do_assign) \
|
|
{ \
|
|
if (malloc_string) \
|
|
{ \
|
|
/* The string is to be stored in a malloc'd buffer. */ \
|
|
strptr = ARG (char **); \
|
|
if (strptr == NULL) \
|
|
conv_error (); \
|
|
/* Allocate an initial buffer. */ \
|
|
strsize = 100; \
|
|
*strptr = str = malloc (strsize); \
|
|
} \
|
|
else \
|
|
str = ARG (char *); \
|
|
if (str == NULL) \
|
|
conv_error (); \
|
|
}
|
|
STRING_ARG;
|
|
|
|
if (c == EOF)
|
|
input_error ();
|
|
|
|
do
|
|
{
|
|
if (isspace (c))
|
|
break;
|
|
#define STRING_ADD_CHAR(c) \
|
|
if (do_assign) \
|
|
{ \
|
|
*str++ = c; \
|
|
if (malloc_string && str == *strptr + strsize) \
|
|
{ \
|
|
/* Enlarge the buffer. */ \
|
|
str = realloc (*strptr, strsize * 2); \
|
|
if (str == NULL) \
|
|
{ \
|
|
/* Can't allocate that much. Last-ditch effort. */\
|
|
str = realloc (*strptr, strsize + 1); \
|
|
if (str == NULL) \
|
|
{ \
|
|
/* We lose. Oh well. \
|
|
Terminate the string and stop converting, \
|
|
so at least we don't swallow any input. */ \
|
|
(*strptr)[strsize] = '\0'; \
|
|
++done; \
|
|
conv_error (); \
|
|
} \
|
|
else \
|
|
{ \
|
|
*strptr = str; \
|
|
str += strsize; \
|
|
++strsize; \
|
|
} \
|
|
} \
|
|
else \
|
|
{ \
|
|
*strptr = str; \
|
|
str += strsize; \
|
|
strsize *= 2; \
|
|
} \
|
|
} \
|
|
}
|
|
STRING_ADD_CHAR (c);
|
|
} while (inchar () != EOF && (width <= 0 || --width > 0));
|
|
|
|
if (do_assign)
|
|
{
|
|
*str = '\0';
|
|
++done;
|
|
}
|
|
break;
|
|
|
|
case 'x': /* Hexadecimal integer. */
|
|
case 'X': /* Ditto. */
|
|
base = 16;
|
|
number_signed = 0;
|
|
goto number;
|
|
|
|
case 'o': /* Octal integer. */
|
|
base = 8;
|
|
number_signed = 0;
|
|
goto number;
|
|
|
|
case 'u': /* Unsigned decimal integer. */
|
|
base = 10;
|
|
number_signed = 0;
|
|
goto number;
|
|
|
|
case 'd': /* Signed decimal integer. */
|
|
base = 10;
|
|
number_signed = 1;
|
|
goto number;
|
|
|
|
case 'i': /* Generic number. */
|
|
base = 0;
|
|
number_signed = 1;
|
|
|
|
number:
|
|
if (c == EOF)
|
|
input_error ();
|
|
|
|
/* Check for a sign. */
|
|
if (c == '-' || c == '+')
|
|
{
|
|
*w++ = c;
|
|
if (width > 0)
|
|
--width;
|
|
(void) inchar ();
|
|
}
|
|
|
|
/* Look for a leading indication of base. */
|
|
if (c == '0')
|
|
{
|
|
if (width > 0)
|
|
--width;
|
|
*w++ = '0';
|
|
|
|
(void) inchar ();
|
|
|
|
if (tolower (c) == 'x')
|
|
{
|
|
if (base == 0)
|
|
base = 16;
|
|
if (base == 16)
|
|
{
|
|
if (width > 0)
|
|
--width;
|
|
(void) inchar ();
|
|
}
|
|
}
|
|
else if (base == 0)
|
|
base = 8;
|
|
}
|
|
|
|
if (base == 0)
|
|
base = 10;
|
|
|
|
/* Read the number into WORK. */
|
|
do
|
|
{
|
|
if (base == 16 ? !isxdigit (c) :
|
|
(!isdigit (c) || c - '0' >= base))
|
|
break;
|
|
*w++ = c;
|
|
if (width > 0)
|
|
--width;
|
|
}
|
|
while (inchar () != EOF && width != 0);
|
|
|
|
if (w == work ||
|
|
(w - work == 1 && (work[0] == '+' || work[0] == '-')))
|
|
/* There was no number. */
|
|
conv_error ();
|
|
|
|
/* Convert the number. */
|
|
*w = '\0';
|
|
if (is_longlong)
|
|
{
|
|
if (number_signed)
|
|
num.q = __strtoq_internal (work, &w, base, group_flag);
|
|
else
|
|
num.uq = __strtouq_internal (work, &w, base, group_flag);
|
|
}
|
|
else
|
|
{
|
|
if (number_signed)
|
|
num.l = __strtol_internal (work, &w, base, group_flag);
|
|
else
|
|
num.ul = __strtoul_internal (work, &w, base, group_flag);
|
|
}
|
|
if (w == work)
|
|
conv_error ();
|
|
|
|
if (do_assign)
|
|
{
|
|
if (! number_signed)
|
|
{
|
|
if (is_longlong)
|
|
*ARG (unsigned LONGLONG int *) = num.uq;
|
|
else if (is_long)
|
|
*ARG (unsigned long int *) = num.ul;
|
|
else if (is_short)
|
|
*ARG (unsigned short int *)
|
|
= (unsigned short int) num.ul;
|
|
else
|
|
*ARG (unsigned int *) = (unsigned int) num.ul;
|
|
}
|
|
else
|
|
{
|
|
if (is_longlong)
|
|
*ARG (LONGLONG int *) = num.q;
|
|
else if (is_long)
|
|
*ARG (long int *) = num.l;
|
|
else if (is_short)
|
|
*ARG (short int *) = (short int) num.l;
|
|
else
|
|
*ARG (int *) = (int) num.l;
|
|
}
|
|
++done;
|
|
}
|
|
break;
|
|
|
|
case 'e': /* Floating-point numbers. */
|
|
case 'E':
|
|
case 'f':
|
|
case 'g':
|
|
case 'G':
|
|
if (c == EOF)
|
|
input_error ();
|
|
|
|
/* Check for a sign. */
|
|
if (c == '-' || c == '+')
|
|
{
|
|
*w++ = c;
|
|
if (inchar () == EOF)
|
|
/* EOF is only an input error before we read any chars. */
|
|
conv_error ();
|
|
if (width > 0)
|
|
--width;
|
|
}
|
|
|
|
got_dot = got_e = 0;
|
|
do
|
|
{
|
|
if (isdigit (c))
|
|
*w++ = c;
|
|
else if (got_e && w[-1] == 'e' && (c == '-' || c == '+'))
|
|
*w++ = c;
|
|
else if (!got_e && tolower (c) == 'e')
|
|
{
|
|
*w++ = 'e';
|
|
got_e = got_dot = 1;
|
|
}
|
|
else if (c == decimal && !got_dot)
|
|
{
|
|
*w++ = c;
|
|
got_dot = 1;
|
|
}
|
|
else
|
|
break;
|
|
if (width > 0)
|
|
--width;
|
|
} while (inchar () != EOF && width != 0);
|
|
|
|
if (w == work)
|
|
conv_error();
|
|
if (w[-1] == '-' || w[-1] == '+' || w[-1] == 'e')
|
|
conv_error ();
|
|
|
|
/* Convert the number. */
|
|
*w = '\0';
|
|
if (is_long_double)
|
|
{
|
|
long double d = __strtold_internal (work, &w, group_flag);
|
|
if (do_assign && w != work)
|
|
*ARG (long double *) = d;
|
|
}
|
|
else if (is_long)
|
|
{
|
|
double d = __strtod_internal (work, &w, group_flag);
|
|
if (do_assign && w != work)
|
|
*ARG (double *) = d;
|
|
}
|
|
else
|
|
{
|
|
float d = __strtof_internal (work, &w, group_flag);
|
|
if (do_assign && w != work)
|
|
*ARG (float *) = d;
|
|
}
|
|
|
|
if (w == work)
|
|
conv_error ();
|
|
|
|
if (do_assign)
|
|
++done;
|
|
break;
|
|
|
|
case '[': /* Character class. */
|
|
STRING_ARG;
|
|
|
|
if (c == EOF)
|
|
input_error();
|
|
|
|
if (*f == '^')
|
|
{
|
|
++f;
|
|
not_in = 1;
|
|
}
|
|
else
|
|
not_in = 0;
|
|
|
|
while ((fc = *f++) != '\0' && fc != ']')
|
|
{
|
|
if (fc == '-' && *f != '\0' && *f != ']' &&
|
|
w > work && w[-1] <= *f)
|
|
/* Add all characters from the one before the '-'
|
|
up to (but not including) the next format char. */
|
|
for (fc = w[-1] + 1; fc < *f; ++fc)
|
|
*w++ = fc;
|
|
else
|
|
/* Add the character to the list. */
|
|
*w++ = fc;
|
|
}
|
|
if (fc == '\0')
|
|
conv_error();
|
|
|
|
*w = '\0';
|
|
num.ul = read_in;
|
|
do
|
|
{
|
|
if ((strchr (work, c) == NULL) != not_in)
|
|
break;
|
|
STRING_ADD_CHAR (c);
|
|
if (width > 0)
|
|
--width;
|
|
} while (inchar () != EOF && width != 0);
|
|
if (read_in == num.ul)
|
|
conv_error ();
|
|
|
|
if (do_assign)
|
|
{
|
|
*str = '\0';
|
|
++done;
|
|
}
|
|
break;
|
|
|
|
case 'p': /* Generic pointer. */
|
|
base = 16;
|
|
/* A PTR must be the same size as a `long int'. */
|
|
is_long = 1;
|
|
number_signed = 0;
|
|
goto number;
|
|
}
|
|
}
|
|
|
|
return ((c == EOF || ungetc (c, s)), done);
|
|
}
|
|
|
|
#ifndef USE_IN_LIBIO
|
|
weak_alias (__vfscanf, vfscanf)
|
|
#endif
|