[gfortran] Patch for PR 14055

[Bud Davis <bdavis9659 at comcast dot net>]

The problem is a leading "+" in a data statement constant yields a zero
in the variable.
 
        DATA I /+100/

gives I=100

Caused by the gmp routines returning an error when given a string with a
leading '+'. 


Tested i686/gnu/linux, no additional failures.

Test Case:

C PR 14055, leading '+' in data statements gives a 0 value
C
       DATA PI /+3.1415/
       DATA I /+100/
       IF (PI.NE.3.1415) THEN
           PRINT*,'DATA STATEMENT WITH REAL GAVE ',PI,' EXPECTED ',3.14
           CALL ABORT
       ENDIF
       IF (I.NE.100) THEN
           PRINT*,'DATA STATEMENT WITH INTEGER GAVE ',I,' EXPECTED ',100
           CALL ABORT
       ENDIF
       END

Changelog:

2004-03-06      Bud Davis       <bdavis9659@comcast.net>
 
        PR 14055
 
        * arith.c (gfc_convert_integer,gfc_convert_real):  Removed leading '+'
        before conversion by gmp library call.


regards,
bud davis



Index: gcc/gcc/fortran/arith.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/fortran/Attic/arith.c,v
retrieving revision 1.1.2.3
diff -c -3 -p -r1.1.2.3 arith.c
*** gcc/gcc/fortran/arith.c     29 Aug 2003 19:18:33 -0000      1.1.2.3
--- gcc/gcc/fortran/arith.c     6 Mar 2004 19:39:51 -0000
*************** gfc_expr *
*** 2426,2434 ****
  gfc_convert_integer (const char *buffer, int kind, int radix, locus * where)
  {
    gfc_expr *e;
   
    e = gfc_constant_result (BT_INTEGER, kind, where);
!   mpz_set_str (e->value.integer, buffer, radix);
   
    return e;
  }
--- 2426,2440 ----
  gfc_convert_integer (const char *buffer, int kind, int radix, locus * where)
  {
    gfc_expr *e;
+   const char *t;
   
    e = gfc_constant_result (BT_INTEGER, kind, where);
!   /* a leading plus is allowed, but not by mpz_set_str */
!   if (buffer[0] == '+')
!     t = buffer + 1;
!   else
!     t = buffer;
!   mpz_set_str (e->value.integer, t, radix);
   
    return e;
  }
*************** gfc_expr *
*** 2440,2448 ****
  gfc_convert_real (const char *buffer, int kind, locus * where)
  {
    gfc_expr *e;
   
    e = gfc_constant_result (BT_REAL, kind, where);
!   mpf_set_str (e->value.real, buffer, 10);
   
    return e;
  }
--- 2446,2460 ----
  gfc_convert_real (const char *buffer, int kind, locus * where)
  {
    gfc_expr *e;
+   const char *t;
   
    e = gfc_constant_result (BT_REAL, kind, where);
!   /* a leading plus is allowed, but not by mpf_set_str */
!   if (buffer[0] == '+')
!     t = buffer + 1;
!   else
!     t = buffer;
!   mpf_set_str (e->value.real, t, 10);
   
    return e;
  }