From 28f540f45bbacd939bfd07f213bcad2bf730b1bf Mon Sep 17 00:00:00 2001
From: Roland McGrath <roland@gnu.org>
Date: Sat, 18 Feb 1995 01:27:10 +0000
Subject: initial import

---
 stdio/printf-prs.c | 211 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 211 insertions(+)
 create mode 100644 stdio/printf-prs.c

(limited to 'stdio/printf-prs.c')

diff --git a/stdio/printf-prs.c b/stdio/printf-prs.c
new file mode 100644
index 0000000000..2f55dd3157
--- /dev/null
+++ b/stdio/printf-prs.c
@@ -0,0 +1,211 @@
+/* Copyright (C) 1991, 1992, 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 <stdio.h>
+#include <printf.h>
+#include <limits.h>
+#include <string.h>
+#include <ctype.h>
+
+#ifdef	__GNUC__
+#define	HAVE_LONGLONG
+#endif
+
+extern printf_arginfo_function *__printf_arginfo_table[];
+
+size_t
+DEFUN(parse_printf_format, (fmt, n, argtypes),
+      CONST char *fmt AND size_t n AND int *argtypes)
+{
+  register CONST char *f;
+  size_t need = 0;
+
+  for (f = strchr (fmt, '%'); f != NULL; f = strchr (f, '%'))
+    {
+      struct printf_info info;
+      printf_arginfo_function *arginfo;
+
+      ++f;
+
+      info.space = info.showsign = info.left = info.alt = info.group = 0;
+      info.pad = ' ';
+      while (*f == ' ' || *f == '+' || *f == '-' || *f == '#' || *f == '0' ||
+	     *f == '\'')
+	switch (*f++)
+	  {
+	  case ' ':
+	    info.space = 1;
+	    break;
+	  case '+':
+	    info.showsign = 1;
+	    break;
+	  case '-':
+	    info.left = 1;
+	    break;
+	  case '#':
+	    info.alt = 1;
+	    break;
+	  case '\'':
+	    info.group = 1;
+	    break;
+	  case '0':
+	    info.pad = '0';
+	    break;
+	  }
+      if (info.left)
+	info.pad = ' ';
+
+      /* Get the field width.  */
+      if (*f == '*')
+	{
+	  if (++need < n)
+	    *argtypes++ = PA_INT;
+	  info.width = INT_MIN;
+	  ++f;
+	}
+      else
+	{
+	  info.width = 0;
+	  while (isdigit(*f))
+	    {
+	      info.width *= 10;
+	      info.width += *f++ - '0';
+	    }
+	}
+
+      /* Get the precision.  */
+      /* -1 means none given; 0 means explicit 0.  */
+      info.prec = -1;
+      if (*f == '.')
+	{
+	  ++f;
+	  if (*f == '*')
+	    {
+	      /* The precision is given in an argument.  */
+	      if (++need < n)
+		*argtypes++ = PA_INT;
+	      info.prec = INT_MIN;
+	      ++f;
+	    }
+	  else if (isdigit(*f))
+	    {
+	      info.prec = 0;
+	      while (*f != '\0' && isdigit(*f))
+		{
+		  info.prec *= 10;
+		  info.prec += *f++ - '0';
+		}
+	    }
+	}
+
+      /* Check for type modifiers.  */
+      info.is_short = info.is_long = info.is_long_double = 0;
+      while (*f == 'h' || *f == 'l' || *f == 'L')
+	switch (*f++)
+	  {
+	  case 'h':
+	    /* int's are short int's.  */
+	    info.is_short = 1;
+	    break;
+	  case 'l':
+#ifdef	HAVE_LONGLONG
+	    if (info.is_long)
+	      /* A double `l' is equivalent to an `L'.  */
+	      info.is_long_double = 1;
+	    else
+#endif
+	      /* int's are long int's.  */
+	      info.is_long = 1;
+	    break;
+	  case 'L':
+	    /* double's are long double's, and int's are long long int's.  */
+	    info.is_long_double = 1;
+	    break;
+	  }
+
+      if (*f == '\0')
+	return need;
+
+      info.spec = *f++;
+
+      arginfo = __printf_arginfo_table[info.spec];
+      if (arginfo != NULL)
+	{
+	  size_t nargs
+	    = (*arginfo) (&info, need > n ? 0 : n - need, argtypes);
+	  need += nargs;
+	  argtypes += nargs;
+	}
+      else
+	{
+	  int type;
+	  switch (info.spec)
+	    {
+	    case 'i':
+	    case 'd':
+	    case 'u':
+	    case 'o':
+	    case 'X':
+	    case 'x':
+	      type = PA_INT;
+	      break;
+
+	    case 'e':
+	    case 'E':
+	    case 'f':
+	    case 'g':
+	    case 'G':
+	      type = PA_DOUBLE;
+	      break;
+
+	    case 'c':
+	      type = PA_CHAR;
+	      break;
+
+	    case 's':
+	      type = PA_STRING;
+	      break;
+
+	    case 'p':
+	      type = PA_POINTER;
+	      break;
+
+	    case 'n':
+	      type = PA_INT | PA_FLAG_PTR;
+	      break;
+
+	    default:
+	      /* No arg for an unknown spec.  */
+	      continue;
+	    }
+
+	  if (info.is_long_double)
+	    type |= PA_FLAG_LONG_DOUBLE;
+	  if (info.is_long)
+	    type |= PA_FLAG_LONG;
+	  if (info.is_short)
+	    type |= PA_FLAG_SHORT;
+
+	  if (++need < n)
+	    *argtypes++ = type;
+	}
+    }
+
+  return need;
+}
-- 
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