util.h

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/*

  Copyright (C) 2000, 2001 Silicon Graphics, Inc.  All Rights Reserved.

  This program is free software; you can redistribute it and/or modify it
  under the terms of version 2 of the GNU General Public License as
  published by the Free Software Foundation.

  This program is distributed in the hope that it would be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

  Further, this software is distributed without any warranty that it is
  free of the rightful claim of any third person regarding infringement 
  or the like.  Any license provided herein, whether implied or 
  otherwise, applies only to this software file.  Patent licenses, if 
  any, provided herein do not apply to combinations of this program with 
  other software, or any other product whatsoever.  

  You should have received a copy of the GNU General Public License along
  with this program; if not, write the Free Software Foundation, Inc., 59
  Temple Place - Suite 330, Boston MA 02111-1307, USA.

  Contact information:  Silicon Graphics, Inc., 1600 Amphitheatre Pky,
  Mountain View, CA 94043, or:

  http://www.sgi.com

  For further information regarding this notice, see:

  http://oss.sgi.com/projects/GenInfo/NoticeExplan

*/


#ifndef util_INCLUDED
#define util_INCLUDED
#ifdef __cplusplus
extern "C" {
#endif



#ifdef _KEEP_RCS_ID
#endif /* _KEEP_RCS_ID */

/* Generate a call to an external command:
 * Returns 0 on success, an error code on failure.
 * An error code < 0400 is a Unix error code from errno.h.
 * An error code > 0400 is 0400 plus the signal which killed child.
 */
extern INT Execute (
  char *cmd,            /* The command to execute */
  char **argv,          /* Argument list */
  char *stdoutfile,     /* stdout for new process to use or NULL */
  BOOL echo             /* Echo command line? */
);

/* Get the value of an environment variable: */
extern char *Get_Environment_Value (
  char *name,   /* The name of the environment variable */
  char **envp,  /* Array of environment variables + NULL */
  char *def     /* Default to return if not found */
);

/* Check an integer value against bounds: */
extern INT Check_Range (
  INT val,      /* Check this value */
  INT lbound,   /* ... against this lower bound */
  INT ubound,   /* ... and this upper bound, */
  INT def       /* ... with this default. */
);              /* Returns val if in range, def if out of range. */

/* Print tabs and spaces to indent given number of characters: */
extern void Indent (
  FILE *f,      /* File to indent */
  INT16 indent  /* Number of spaces to indent */
);

/* Mathematically correct integer modulus function: */
INT Mod(
  INT i,
  INT j
);

/* Min & Max functions.  These really have to be functions because
 * they evaluate their arguments an indeterminate number of times.  (1
 * or 2).
 */
extern INT Min(
  INT i,
  INT j
);

extern INT Max(
  INT i,
  INT j
);

/* Count set bits */
extern const mUINT8 UINT8_pop_count[256];
extern TARG_INT
TARG_INT_Pop_Count(
  TARG_INT x
);

/* Find leftmost set bit */
/*      extern const mUINT8 UINT8_most_sig_one[256];    */
extern TARG_INT
TARG_INT_Most_Sig_One(
  TARG_INT x
);

/* Find rightmost set bit. */
extern const mUINT8 UINT8_least_sig_one[256];
extern TARG_INT
TARG_INT_Least_Sig_One(
  TARG_INT x
);

extern INT32 nearest_power_of_two(INT32 n);

/* Is there a string of ones from bit ub to lb ([63 .. 0])      */
extern BOOL Immediate_Has_All_Ones(INT64 imm, INT32 ub, INT32 lb);


#ifdef __cplusplus
}
#endif
#endif /* util_INCLUDED */