/*
 * (C) Copyright Transarc Corporation 1989
 * Licensed Materials - Property of Transarc
 * All Rights Reserved.
 */

/*------------------------------------------------------------------------
 * globfuncs.c
 *
 * Description:
 *	Generically useful functions for package, the AFS workstation
 *	configuration tool.
 *
 * Author:
 *	Transarc Corporation & Carnegie Mellon University
 *------------------------------------------------------------------------*/

#include <stdio.h>
#include "globals.h"

/*------------------------------------------------------------------------
 * emalloc
 *
 * Description:
 *	Malloc with error checking.
 *
 * Arguments:
 *	unsigned size : Number of bytes to allocate.
 *
 * Returns:
 *	Ptr to new space if successful, 
 *	Exit from package on failure.
 *
 * Environment:
 *	Nothing interesting.
 *
 * Side Effects:
 *	As described; may exit from package.
 *------------------------------------------------------------------------*/

char *emalloc(size)
    unsigned size;

{ /*emalloc*/

    char *malloc();
    char *ptr;

    if ((ptr = malloc(size)) == NULL) {
      fprintf(stderr,
	      "Error: Out of memory; malloc() failed allocating %d bytes\n",
	      size);
      exit(ERR_OUTOFMEMORY);
    }
    else
      return(ptr);

} /*emalloc*/

/*------------------------------------------------------------------------
 * ecalloc
 *
 * Description:
 *	Calloc() with error checking.
 *
 * Arguments:
 *	unsigned nelem : Number of elements to allocate.
 *	unsigned size  : Number of bytes for each.
 *
 * Returns:
 *	Ptr to new space on success,
 *	Exit from package on failure.
 *
 * Environment:
 *	Nothing interesting.
 *
 * Side Effects:
 *	As described; may exit from package.
 *------------------------------------------------------------------------*/

char *ecalloc(nelem, size)
    unsigned nelem;
    unsigned size;

{ /*ecalloc*/

    char *calloc();
    char *ptr;

    if ((ptr = calloc(nelem, size)) == NULL) {
      fprintf(stderr, "Error: Out of memory; calloc(%d, %d) failed\n",
	      nelem, size);
      exit(ERR_OUTOFMEMORY);
    }
    else
      return(ptr);

} /*ecalloc*/

/*------------------------------------------------------------------------
 * efopen
 *
 * Description:
 *	Fopen with error checking.
 *
 * Arguments:
 *	char *filename	: Name of file to open.
 *	char *type	: Open mode.
 *
 * Returns:
 *	Ptr to file descriptor on success,
 *	Exit from package on failure.
 *
 * Environment:
 *	Nothign interesting.
 *
 * Side Effects:
 *	As described; may exit from package.
 *------------------------------------------------------------------------*/

FILE *efopen(filename, type)
    char *filename;
    char *type;

{ /*efopen*/

    FILE *f;

    if ((f = fopen(filename, type)) == NULL) {
      fprintf(stderr, "Error: Couldn't open file; fopen(%s, %s) failed\n",
	      filename, type);
      exit(ERR_FOPENFAILED);
    }
    else
      return(f);

} /*efopen*/