/* $XConsortium: util.c,v 1.6 92/03/26 16:42:26 eswu Exp $ */
/* Copyright International Business Machines,Corp. 1991
 * All Rights Reserved
 *
 * License to use, copy, modify, and distribute this software
 * and its documentation for any purpose and without fee is
 * hereby granted, provided that the above copyright notice
 * appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation,
 * and that the name of IBM not be used in advertising or
 * publicity pertaining to distribution of the software without
 * specific, written prior permission.
 *
 * IBM PROVIDES THIS SOFTWARE "AS IS", WITHOUT ANY WARRANTIES
 * OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT
 * LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, AND NONINFRINGEMENT OF
 * THIRD PARTY RIGHTS.  THE ENTIRE RISK AS TO THE QUALITY AND
 * PERFORMANCE OF THE SOFTWARE, INCLUDING ANY DUTY TO SUPPORT
 * OR MAINTAIN, BELONGS TO THE LICENSEE.  SHOULD ANY PORTION OF
 * THE SOFTWARE PROVE DEFECTIVE, THE LICENSEE (NOT IBM) ASSUMES
 * THE ENTIRE COST OF ALL SERVICING, REPAIR AND CORRECTION.  IN
 * NO EVENT SHALL IBM BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
 * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
 * SOFTWARE.
 */
/* Author: Katherine A. Hitchcock    IBM Almaden Research Laboratory */
 
#include "types.h"
#include <stdio.h>
#include <stdlib.h>
#include "util.h"
#include "fontmisc.h"

static char *vm_base = NULL;  /* Start of virtual memory area */
       char *vm_next = NULL;  /* Pointer to first free byte */
       LONG  vm_free = 0;     /* Count of free bytes */
       LONG  vm_size = 0;     /* Total size of memory */

/* The following global variable is for detecting a trial to
   allocate a second chunk---not to be done with the t1lib, since
   a later reallocation would lead to segmentation faults!
   */
int vm_init_count;
/* This is the amount of VM, the font is tried to be loaded in. */
int vm_init_amount;


/*
 * Initialize memory.
 */

extern char *tokenMaxP;   /* Pointer to end of VM we may use + 1 */

boolean vm_init()
{
  /* Check whether it is the first piece of memory for the
     current font or not. If so, simulate lacking memory to
     indicate that the font should be tried to load with a
     vitual memory twice as large!
     */
  if (vm_init_count>0){
    vm_init_count++;
    return(FALSE);
  }
  vm_init_count++;
  
  vm_next = vm_base = (char *) calloc( vm_init_amount, sizeof(char));

  if (vm_base != NULL) {
    vm_free = vm_init_amount;
    vm_size = vm_init_amount;
    tokenMaxP = vm_next_byte() + vm_init_amount;
    return(TRUE);
  }
  else
    return(FALSE);
}
 
char *vm_alloc(bytes)
  unsigned int bytes;
{
  char *answer;
 
  /* Align returned bytes to 64-bit boundary */
  bytes = (bytes + 7) & ~7;
  
  
  /* take space from what is left otherwise allocate another CHUNK */
  if (bytes > vm_free){
    if (!vm_init()) return NULL;
  }
  else{
    answer = vm_next;
    vm_free -= bytes;
    vm_next += bytes;
    return answer;
  }

  /* Never reached, but compiler is happy: */
  return NULL;
  
}

/*
 * Format an Integer object
 */
void objFormatInteger( psobj *objP, int value)
{
  if (objP != NULL) {
    objP->type         = OBJ_INTEGER;
    objP->len          = 0;
    objP->data.integer = value;
  }
}
 
/*
 * Format a Real object
 */
void objFormatReal(psobj *objP, float value)
{
  if (objP != NULL) {
    objP->type       = OBJ_REAL;
    objP->len        = 0;
    objP->data.real  = value;
  }
}
 
/*
 * Format a Boolean object
 */
void objFormatBoolean(psobj *objP, boolean value)
{
  if (objP != NULL) {
    objP->type         = OBJ_BOOLEAN;
    objP->len          = 0;
    objP->data.boolean = value;
  }
}
 
/*
 * Format an Encoding object
 */
void objFormatEncoding(psobj *objP, int length, psobj *valueP)
{
  if (objP != NULL) {
    objP->type        = OBJ_ENCODING;
    objP->len         = length;
    objP->data.arrayP = valueP;
  }
}
 
/*
 * Format an Array object
 */
void objFormatArray(psobj *objP, int length, psobj *valueP)
{
  if (objP != NULL) {
    objP->type        = OBJ_ARRAY;
    objP->len         = length;
    objP->data.arrayP = valueP;
  }
}
 
 
/*
 * Format a String object
 */
void objFormatString(psobj *objP, int length, char *valueP)
{
  if (objP != NULL) {
    objP->type         = OBJ_STRING;
    objP->len          = length;
    objP->data.valueP  = valueP;
  }
}
 
/*
 * Format a Name object
 */
void objFormatName( psobj *objP, int length, char *valueP)
{
  if (objP != NULL) {
    objP->type         = OBJ_NAME;
    objP->len          = length;
    objP->data.nameP   = valueP;
  }
}
 
/*
 * Format a File object
 */
void objFormatFile(psobj *objP, FILE *valueP)
{
  if (objP != NULL) {
    objP->type         = OBJ_FILE;
    objP->len          = 0;
    objP->data.fileP   = valueP;
  }
}