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- /* Copyright (C) 1989, 1990, 1991, 1992 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.
- */
-
- /* zstring.c */
- /* String operators */
- #include "memory_.h"
- #include "ghost.h"
- #include "errors.h"
- #include "gsutil.h"
- #include "ialloc.h"
- #include "iname.h"
- #include "ivmspace.h" /* for ialloc_local_attr */
- #include "oper.h"
- #include "store.h"
-
- /* The generic operators (copy, get, put, getinterval, putinterval, */
- /* length, and forall) are implemented in zgeneric.c. */
-
- /* <int> string <string> */
- int
- zstring(register os_ptr op)
- { byte *sbody;
- uint size;
- check_int_leu(*op, max_string_size);
- size = op->value.intval;
- sbody = ialloc_string(size, "string");
- if ( sbody == 0 )
- return_error(e_VMerror);
- make_string(op, a_all | ilocal_attr, size, sbody);
- memset(sbody, 0, size);
- return 0;
- }
-
- /* <string> <pattern> anchorsearch <post> <match> -true- */
- /* <string> <pattern> anchorsearch <string> -false- */
- int
- zanchorsearch(register os_ptr op)
- { os_ptr op1 = op - 1;
- uint size = r_size(op);
- check_read_type(*op1, t_string);
- check_read_type(*op, t_string);
- if ( size <= r_size(op1) && !memcmp(op1->value.bytes, op->value.bytes, size) )
- { os_ptr op0 = op;
- push(1);
- *op0 = *op1;
- r_set_size(op0, size);
- op1->value.bytes += size;
- r_dec_size(op1, size);
- make_true(op);
- }
- else
- make_false(op);
- return 0;
- }
-
- /* <string> <pattern> search <post> <match> <pre> -true- */
- /* <string> <pattern> search <string> -false- */
- int
- zsearch(register os_ptr op)
- { os_ptr op1 = op - 1;
- uint size = r_size(op);
- uint count;
- byte *ptr;
- check_read_type(*op1, t_string);
- check_read_type(*op, t_string);
- if ( size > r_size(op1) ) /* can't match */
- { make_false(op);
- return 0;
- }
- count = r_size(op1) - size;
- ptr = op1->value.bytes;
- do
- { if ( !memcmp(ptr, op->value.bytes, size) )
- { op->tas.type_attrs = op1->tas.type_attrs;
- op->value.bytes = ptr;
- r_set_size(op, size);
- push(2);
- op[-1] = *op1;
- r_set_size(op - 1, ptr - op[-1].value.bytes);
- op1->value.bytes = ptr + size;
- r_set_size(op1, count);
- make_true(op);
- return 0;
- }
- ptr++;
- }
- while ( count-- );
- /* No match */
- make_false(op);
- return 0;
- }
-
- /* <obj> <pattern> .stringmatch <bool> */
- int
- zstringmatch(register os_ptr op)
- { os_ptr op1 = op - 1;
- bool result;
- check_read_type(*op, t_string);
- switch ( r_type(op1) )
- {
- case t_string:
- check_read(*op1);
- goto cmp;
- case t_name:
- name_string_ref(op1, op1); /* can't fail */
- cmp: result = string_match(op1->value.const_bytes, r_size(op1),
- op->value.const_bytes, r_size(op),
- NULL);
- break;
- default:
- result = (r_size(op) == 1 && *op->value.bytes == '*');
- }
- make_bool(op1, result);
- pop(1);
- return 0;
- }
-
- /* ------ Initialization procedure ------ */
-
- op_def zstring_op_defs[] = {
- {"2anchorsearch", zanchorsearch},
- {"2search", zsearch},
- {"1string", zstring},
- {"2.stringmatch", zstringmatch},
- op_def_end(0)
- };
-