initial import

1 files changed, 570 insertions, 0 deletions

diff --git a/stdio/vfscanf.c b/stdio/vfscanf.c
new file mode 100644
index 0000000000..681e89819b
--- /dev/null
+++ b/stdio/vfscanf.c
@@ -0,0 +1,570 @@
+/* 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 <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
+
+
+#define	inchar()	((c = getc(s)) == EOF ? EOF : (++read_in, c))
+#define	conv_error()	return ((c == EOF || ungetc(c, s)), done)
+#define input_error()	return (done == 0 ? EOF : done)
+#define	memory_error()	return ((errno = ENOMEM), EOF)
+
+
+/* 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.  */
+int
+DEFUN(__vfscanf, (s, format, arg),
+      FILE *s AND CONST char *format AND va_list argptr)
+{
+  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.  */
+
+  /* Type modifiers.  */
+  char 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.  */
+  long int num;
+  unsigned long int unum;
+  /* 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.  */
+
+  if (!__validfp(s) || !s->__mode.__read || format == NULL)
+    {
+      errno = EINVAL;
+      return EOF;
+    }
+
+  /* Figure out the decimal point character.  */
+  if (mbtowc(&decimal, _numeric_info->decimal_point,
+	     strlen(_numeric_info->decimal_point)) <= 0)
+    decimal = (wchar_t) *_numeric_info->decimal_point;
+
+  c = inchar();
+
+  /* Run through the format string.  */
+  while (*f != '\0')
+    {
+      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;
+	}
+
+      /* Check for the assignment-suppressant.  */
+      if (*f == '*')
+	{
+	  do_assign = 0;
+	  ++f;
+	}
+      else
+	do_assign = 1;
+		
+      /* Find the maximum field width.  */
+      width = 0;
+      while (isdigit(*f))
+	{
+	  width *= 10;
+	  width += *f++ - '0';
+	}
+      if (width == 0)
+	width = -1;
+
+      /* Check for type modifiers.  */
+      is_short = is_long = is_long_double = malloc_string = 0;
+      while (*f == 'h' || *f == 'l' || *f == 'L' || *f == 'a' || *f == 'q')
+	switch (*f++)
+	  {
+	  case 'h':
+	    /* int's are short int's.  */
+	    is_short = 1;
+	    break;
+	  case 'l':
+	    if (is_long)
+	      /* A double `l' is equivalent to an `L'.  */
+	      is_longlong = 1;
+	    else
+	      /* int's are long int's.  */
+	      is_long = 1;
+	    break;
+	  case 'q':
+	  case 'L':
+	    /* double's are long double's, and int's are long long int's.  */
+	    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)
+	    *va_arg(arg, int *) = read_in;
+	  break;
+
+	case 'c':	/* Match characters.  */
+	  if (do_assign)
+	    {
+	      str = va_arg (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)
+	      --width;
+
+	  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 = va_arg (arg, char **);			      \
+		  if (strptr == NULL)					      \
+		    conv_error ();					      \
+		  /* Allocate an initial buffer.  */			      \
+		  strsize = 100;					      \
+		  *strptr = str = malloc (strsize);			      \
+		}							      \
+	      else							      \
+		str = va_arg (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 on number.  */
+	    conv_error();
+
+	  /* Convert the number.  */
+	  *w = '\0';
+	  if (number_signed)
+	    num = strtol (work, &w, base);
+	  else
+	    unum = strtoul (work, &w, base);
+	  if (w == work)
+	    conv_error ();
+
+	  if (do_assign)
+	    {
+	      if (! number_signed)
+		{
+		  if (is_longlong)
+		    *va_arg (arg, unsigned LONGLONG int *) = unum;
+		  else if (is_long)
+		    *va_arg (arg, unsigned long int *) = unum;
+		  else if (is_short)
+		    *va_arg (arg, unsigned short int *)
+		      = (unsigned short int) unum;
+		  else
+		    *va_arg(arg, unsigned int *) = (unsigned int) unum;
+		}
+	      else
+		{
+		  if (is_longlong)
+		    *va_arg(arg, LONGLONG int *) = num;
+		  else if (is_long)
+		    *va_arg(arg, long int *) = num;
+		  else if (is_short)
+		    *va_arg(arg, short int *) = (short int) num;
+		  else
+		    *va_arg(arg, int *) = (int) num;
+		}
+	      ++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 (work, &w);
+	      if (do_assign && w != work)
+		*va_arg (arg, long double *) = d;
+	    }
+	  else if (is_long)
+	    {
+	      double d = strtod (work, &w);
+	      if (do_assign && w != work)
+		*va_arg (arg, double *) = d;
+	    }
+	  else
+	    {
+	      float d = __strtof (work, &w);
+	      if (do_assign && w != work)
+		*va_arg (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';
+	  unum = 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 == unum)
+	    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;
+	  goto number;
+	}
+    }
+
+  conv_error();
+}
+
+weak_alias (__vfscanf, vfscanf)