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CU Amiga Super CD-ROM 16
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CU Amiga Magazine's Super CD-ROM 16 (1997-10-16)(EMAP Images)(GB)[!][issue 1997-11].iso
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Ghostscript
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zarray.c
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C/C++ Source or Header
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1995-01-24
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/* Copyright (C) 1989, 1992, 1993 Aladdin Enterprises. All rights reserved.
This file is part of Aladdin Ghostscript.
Aladdin Ghostscript is distributed with NO WARRANTY OF ANY KIND. No author
or distributor accepts any responsibility for the consequences of using it,
or for whether it serves any particular purpose or works at all, unless he
or she says so in writing. Refer to the Aladdin Ghostscript Free Public
License (the "License") for full details.
Every copy of Aladdin Ghostscript must include a copy of the License,
normally in a plain ASCII text file named PUBLIC. The License grants you
the right to copy, modify and redistribute Aladdin Ghostscript, but only
under certain conditions described in the License. Among other things, the
License requires that the copyright notice and this notice be preserved on
all copies.
*/
/* zarray.c */
/* Array operators */
#include "memory_.h"
#include "ghost.h"
#include "errors.h"
#include "ialloc.h"
#include "ipacked.h"
#include "oper.h"
#include "store.h"
/* The generic operators (copy, get, put, getinterval, putinterval, */
/* length, and forall) are implemented in zgeneric.c. */
/* <int> array <array> */
int
zarray(register os_ptr op)
{ uint size;
int code;
check_int_leu(*op, max_array_size);
size = op->value.intval;
code = ialloc_ref_array((ref *)op, a_all, size, "array");
if ( code < 0 )
return code;
refset_null(op->value.refs, size);
return 0;
}
/* <array> aload <obj_0> ... <obj_n-1> <array> */
private int
zaload(register os_ptr op)
{ ref aref;
ref_assign(&aref, op);
if ( !r_is_array(&aref) )
return_op_typecheck(op);
check_read(aref);
#define asize r_size(&aref)
if ( asize > ostop - op )
{ /* Use the slow, general algorithm. */
int code = ref_stack_push(&o_stack, asize);
uint i;
const ref_packed *packed = aref.value.packed;
if ( code < 0 )
return code;
for ( i = asize; i > 0; i--, packed = packed_next(packed) )
packed_get(packed, ref_stack_index(&o_stack, i));
*osp = aref;
return 0;
}
if ( r_has_type(&aref, t_array) )
memcpy((char *)op, (const char *)aref.value.refs,
asize * sizeof(ref));
else
{ register ushort i;
const ref_packed *packed = aref.value.packed;
os_ptr pdest = op;
for ( i = 0; i < asize; i++, pdest++ )
packed_get(packed, pdest),
packed = packed_next(packed);
}
push(asize);
#undef asize
ref_assign(op, &aref);
return 0;
}
/* <obj_0> ... <obj_n-1> <array> astore <array> */
private int
zastore(register os_ptr op)
{ uint size;
int code;
check_write_type(*op, t_array);
size = r_size(op);
if ( size > op - osbot )
{ /* The store operation might involve other stack segments. */
ref arr;
if ( size >= ref_stack_count(&o_stack) )
return_error(e_stackunderflow);
arr = *op;
code = ref_stack_store(&o_stack, &arr, size, 1, 0, true,
"astore");
if ( code < 0 )
return code;
ref_stack_pop(&o_stack, size);
*ref_stack_index(&o_stack, 0) = arr;
}
else
{ code = refcpy_to_old(op, 0, op - size, size, "astore");
if ( code < 0 )
return code;
op[-(int)size] = *op;
pop(size);
}
return 0;
}
/* ------ Initialization procedure ------ */
BEGIN_OP_DEFS(zarray_op_defs) {
{"1aload", zaload},
{"1array", zarray},
{"1astore", zastore},
END_OP_DEFS(0) }