re PR fortran/36515 (Integer read from stdin yields a value overflow for a valid integer.)

2008-06-15  Jerry DeLisle  <jvdelisle@gcc.gnu.org>

	PR fortran/36515
	* libgfortran.h (compile_options_t): Add int range_check to structure.
	* runtime/compile_options.c (set_options): Add range_check option.
	(init_compile_options): Likewise.
	*io/read.c (read_decimal): Change overflow checks to include
	range_check.

From-SVN: r136822

libgfortran/ChangeLog

+2008-06-14  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
+
+	PR fortran/36515
+	* libgfortran.h (compile_options_t): Add int range_check to structure.
+	* runtime/compile_options.c (set_options): Add range_check option.
+	(init_compile_options): Likewise.
+	*io/read.c (read_decimal): Change overflow checks to include
+	range_check.
+	
 2008-06-13  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR fortran/36538

libgfortran/io/read.c

@@ -428,13 +428,13 @@ read_decimal (st_parameter_dt *dtp, const fnode *f, char *dest, int length)
       if (c < '0' || c > '9')
 	goto bad;
 
-      if (value > maxv_10)
+      if (value > maxv_10 && compile_options.range_check == 1)
 	goto overflow;
 
       c -= '0';
       value = 10 * value;
 
-      if (value > maxv - c)
+      if (value > maxv - c && compile_options.range_check == 1)
 	goto overflow;
       value += c;
     }

libgfortran/libgfortran.h

@@ -477,6 +477,7 @@ typedef struct
   size_t record_marker;
   int max_subrecord_length;
   int bounds_check;
+  int range_check;
 }
 compile_options_t;
 

libgfortran/runtime/compile_options.c

@@ -105,6 +105,8 @@ set_options (int num, int options[])
     compile_options.sign_zero = options[5];
   if (num >= 7)
     compile_options.bounds_check = options[6];
+  if (num >= 8)
+    compile_options.range_check = options[7];
 
   /* If backtrace is required, we set signal handlers on most common
      signals.  */
@@ -146,6 +148,7 @@ init_compile_options (void)
   compile_options.dump_core = 0;
   compile_options.backtrace = 0;
   compile_options.sign_zero = 1;
+  compile_options.range_check = 1;
 }
 
 /* Function called by the front-end to tell us the