mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-24 09:13:37 +01:00
120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
/*
|
|
* implement arrays for dc
|
|
*
|
|
* Copyright (C) 1994, 1997, 1998 Free Software Foundation, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, you can either send email to this
|
|
* program's author (see below) or write to: The Free Software Foundation,
|
|
* Inc.; 675 Mass Ave. Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
/* This module is the only one that knows what arrays look like. */
|
|
|
|
#include "config.h"
|
|
|
|
#include <stdio.h> /* "dc-proto.h" wants this */
|
|
#ifdef HAVE_STDLIB_H
|
|
/* get size_t definition from "almost ANSI" compiling environments. */
|
|
#include <stdlib.h>
|
|
#endif
|
|
#include "dc.h"
|
|
#include "dc-proto.h"
|
|
#include "dc-regdef.h"
|
|
|
|
/* what's most useful: quick access or sparse arrays? */
|
|
/* I'll go with sparse arrays for now */
|
|
struct dc_array {
|
|
int Index;
|
|
dc_data value;
|
|
struct dc_array *next;
|
|
};
|
|
|
|
|
|
/* initialize the arrays */
|
|
void
|
|
dc_array_init DC_DECLVOID()
|
|
{
|
|
}
|
|
|
|
/* store value into array_id[Index] */
|
|
void
|
|
dc_array_set DC_DECLARG((array_id, Index, value))
|
|
int array_id DC_DECLSEP
|
|
int Index DC_DECLSEP
|
|
dc_data value DC_DECLEND
|
|
{
|
|
struct dc_array *cur;
|
|
struct dc_array *prev=NULL;
|
|
struct dc_array *newentry;
|
|
|
|
cur = dc_get_stacked_array(array_id);
|
|
while (cur && cur->Index < Index){
|
|
prev = cur;
|
|
cur = cur->next;
|
|
}
|
|
if (cur && cur->Index == Index){
|
|
if (cur->value.dc_type == DC_NUMBER)
|
|
dc_free_num(&cur->value.v.number);
|
|
else if (cur->value.dc_type == DC_STRING)
|
|
dc_free_str(&cur->value.v.string);
|
|
else
|
|
dc_garbage(" in array", array_id);
|
|
cur->value = value;
|
|
}else{
|
|
newentry = dc_malloc(sizeof *newentry);
|
|
newentry->Index = Index;
|
|
newentry->value = value;
|
|
newentry->next = cur;
|
|
if (prev)
|
|
prev->next = newentry;
|
|
else
|
|
dc_set_stacked_array(array_id, newentry);
|
|
}
|
|
}
|
|
|
|
/* retrieve a dup of a value from array_id[Index] */
|
|
/* A zero value is returned if the specified value is unintialized. */
|
|
dc_data
|
|
dc_array_get DC_DECLARG((array_id, Index))
|
|
int array_id DC_DECLSEP
|
|
int Index DC_DECLEND
|
|
{
|
|
struct dc_array *cur;
|
|
|
|
for (cur=dc_get_stacked_array(array_id); cur; cur=cur->next)
|
|
if (cur->Index == Index)
|
|
return dc_dup(cur->value);
|
|
return dc_int2data(0);
|
|
}
|
|
|
|
/* free an array chain */
|
|
void
|
|
dc_array_free DC_DECLARG((a_head))
|
|
struct dc_array *a_head DC_DECLEND
|
|
{
|
|
struct dc_array *cur;
|
|
struct dc_array *next;
|
|
|
|
for (cur=a_head; cur; cur=next) {
|
|
next = cur->next;
|
|
if (cur->value.dc_type == DC_NUMBER)
|
|
dc_free_num(&cur->value.v.number);
|
|
else if (cur->value.dc_type == DC_STRING)
|
|
dc_free_str(&cur->value.v.string);
|
|
else
|
|
dc_garbage("in stack", -1);
|
|
free(cur);
|
|
}
|
|
}
|