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- /* Copyright (C) 1989, 1992, 1993 Aladdin Enterprises. All rights reserved.
-
- This file is part of Ghostscript.
-
- Ghostscript is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY. No author or distributor accepts responsibility
- to anyone for the consequences of using it or for whether it serves any
- particular purpose or works at all, unless he says so in writing. Refer
- to the Ghostscript General Public License for full details.
-
- Everyone is granted permission to copy, modify and redistribute
- Ghostscript, but only under the conditions described in the Ghostscript
- General Public License. A copy of this license is supposed to have been
- given to you along with Ghostscript so you can know your rights and
- responsibilities. It should be in a file named COPYING. Among other
- things, the copyright notice and this notice must be preserved on all
- copies. */
-
- /* zmisc.c */
- /* Miscellaneous operators for Ghostscript */
- #include "errno_.h"
- #include "memory_.h"
- #include "string_.h"
- #include "ghost.h"
- #include "gp.h"
- #include "errors.h"
- #include "oper.h"
- #include "alloc.h"
- #include "dict.h"
- #include "dstack.h" /* for name lookup in bind */
- #include "iname.h"
- #include "ivmspace.h"
- #include "packed.h"
- #include "store.h"
- #include "gscrypt1.h"
-
- /* Import the C getenv function. */
- extern char *getenv(P1(const char *));
-
- /* Import the serial number from iinit.c. */
- extern const long gs_serialnumber;
-
- /* <proc> bind <proc> */
- int
- zbind(register os_ptr op)
- { os_ptr bsp = op; /* bottom of stack */
- ref *defp = op;
- switch ( r_type(op) )
- {
- case t_array:
- case t_mixedarray:
- case t_shortarray:
- break;
- case t_oparray:
- defp = &op_array_table.value.refs[op_index(op) - op_def_count];
- break;
- default:
- return_error(e_typecheck);
- }
- ++bsp;
- /* We must not make the top-level procedure read-only, */
- /* but we must bind it even if it is read-only already. */
- *bsp = *defp;
- /* Here are the invariants for the following loop: */
- /* op < bsp <= ostop; */
- /* for every pointer p such that op < p <= bsp, */
- /* *p is an array (or packedarray) ref. */
- #define r_is_ex_oper(rp)\
- ((r_btype(rp) == t_operator || r_type(rp) == t_oparray) &&\
- r_has_attr(rp, a_executable))
- while ( bsp > op )
- { while ( r_size(bsp) )
- { ref *tp = bsp->value.refs;
- r_inc_size(bsp, -1);
- if ( *(ushort *)tp > packed_max_full_ref )
- { /* Check for a packed executable name */
- ushort elt = *(ushort *)tp;
- if ( (elt & ~(ushort)packed_max_name_index) ==
- pt_tag(pt_executable_name) )
- { ref nref;
- ref *pvalue;
- name_index_ref(elt & packed_max_name_index,
- &nref);
- if ( (pvalue = dict_find_name(&nref)) != 0 &&
- r_is_ex_oper(pvalue)
- )
- /* Note: can't undo this by restore! */
- *(ushort *)tp =
- pt_tag(pt_executable_operator) +
- op_index(pvalue);
- }
- bsp->value.refs = (ref *)((ushort *)tp + 1);
- }
- else
- switch ( bsp->value.refs++, r_type(tp) )
- {
- case t_name: /* bind the name if an operator */
- if ( r_has_attr(tp, a_executable) )
- { ref *pvalue;
- if ( (pvalue = dict_find_name(tp)) != 0 &&
- r_is_ex_oper(pvalue)
- )
- ref_assign_old(tp, pvalue, "bind");
- }
- break;
- case t_array: /* push into array if procedure */
- if ( !r_has_attr(tp, a_write) ) break;
- case t_mixedarray:
- case t_shortarray:
- if ( r_has_attr(tp, a_executable) && bsp < ostop )
- { /* Make reference read-only */
- r_clear_attrs(tp, a_write);
- *++bsp = *tp;
- }
- }
- }
- bsp--;
- }
- return 0;
- }
-
- /* - currenttime <int> */
- int
- zcurrenttime(register os_ptr op)
- { long date_time[2];
- gp_get_clock(date_time);
- push(1);
- make_real(op, date_time[0] * 1440.0 + date_time[1] / 60000.0);
- return 0;
- }
-
- /* <string> getenv <value_string> */
- int
- zgetenv(register os_ptr op)
- { char *str, *value;
- int code;
- check_read_type(*op, t_string);
- str = ref_to_string(op, "getenv name");
- if ( str == 0 )
- return_error(e_VMerror);
- value = getenv(str);
- alloc_free(str, r_size(op) + 1, 1, "getenv name");
- if ( value == 0 ) /* not found */
- { make_bool(op, 0);
- return 0;
- }
- code = string_to_ref(value, op, "getenv value");
- if ( code < 0 ) return code;
- push(1);
- make_bool(op, 1);
- return 0;
- }
-
- /* <name> <proc> .makeoperator <oper> */
- int
- zmakeoperator(register os_ptr op)
- { check_type(op[-1], t_name);
- check_proc(*op);
- if ( r_is_local(op) )
- return_error(e_invalidaccess);
- if ( op_array_count == r_size(&op_array_table) )
- return_error(e_limitcheck);
- ref_assign_old(&op_array_table.value.refs[op_array_count],
- op, "makeoperator");
- op_array_nx_table[op_array_count] = name_index(op - 1);
- r_set_type_attrs(op - 1, t_oparray, a_executable);
- r_set_size(op - 1, op_def_count + op_array_count);
- op_array_count++;
- pop(1);
- return 0;
- }
-
- /* - .oserrno <int> */
- int
- zoserrno(register os_ptr op)
- { push(1);
- make_int(op, errno);
- return 0;
- }
-
- /* <int> .oserrorstring <string> */
- int
- zoserrorstring(register os_ptr op)
- { int code;
- uint len;
- byte ch;
- check_type(*op, t_integer);
- /****** ANSI C requires strerror, but many systems ******/
- /****** don't support it. Punt. ******/
- code = string_to_ref("(error message not available)"
- /*strerror((int)op->value.intval)*/,
- op, "oserror");
- if ( code < 0 )
- return code;
- /* Strip trailing end-of-line characters. */
- while ( (len = r_size(op)) != 0 &&
- ((ch = op->value.bytes[--len]) == '\r' || ch == '\n')
- )
- r_inc_size(op, -1);
- return 0;
- }
-
- /* - serialnumber <int> */
- int
- zserialnumber(register os_ptr op)
- { push(1);
- make_int(op, gs_serialnumber);
- return 0;
- }
-
- /* <string> <bool> .setdebug - */
- int
- zsetdebug(register os_ptr op)
- { check_read_type(op[-1], t_string);
- check_type(*op, t_boolean);
- { int i;
- for ( i = 0; i < r_size(op - 1); i++ )
- gs_debug[op[-1].value.bytes[i] & 127] =
- op->value.index;
- }
- pop(2);
- return 0;
- }
-
- /* <state> <from_string> <to_string> type1encrypt <new_state> <substring> */
- /* <state> <from_string> <to_string> type1decrypt <new_state> <substring> */
- private int type1crypt(P2(os_ptr,
- int (*)(P4(byte *, const byte *, uint, ushort *))));
- int
- ztype1encrypt(os_ptr op)
- { return type1crypt(op, gs_type1_encrypt);
- }
- int
- ztype1decrypt(os_ptr op)
- { return type1crypt(op, gs_type1_decrypt);
- }
- private int
- type1crypt(register os_ptr op, int (*proc)(P4(byte *, const byte *, uint, ushort *)))
- { crypt_state state;
- uint ssize;
- check_type(op[-2], t_integer);
- state = op[-2].value.intval;
- if ( op[-2].value.intval != state )
- return_error(e_rangecheck); /* state value was truncated */
- check_read_type(op[-1], t_string);
- check_write_type(*op, t_string);
- ssize = r_size(op - 1);
- if ( r_size(op) < ssize )
- return_error(e_rangecheck);
- (void) (*proc)(op->value.bytes, op[-1].value.const_bytes, ssize,
- &state); /* can't fail */
- op[-2].value.intval = state;
- op[-1] = *op;
- r_set_size(op - 1, ssize);
- pop(1);
- return 0;
- }
-
- /* - usertime <int> */
- int
- zusertime(register os_ptr op)
- { long date_time[2];
- gp_get_clock(date_time);
- push(1);
- make_int(op, date_time[0] * 86400000L + date_time[1]);
- return 0;
- }
-
- /* ------ Initialization procedure ------ */
-
- op_def zmisc_op_defs[] = {
- {"1bind", zbind},
- {"0currenttime", zcurrenttime},
- {"1getenv", zgetenv},
- {"2.makeoperator", zmakeoperator},
- {"0.oserrno", zoserrno},
- {"1.oserrorstring", zoserrorstring},
- {"1serialnumber", zserialnumber},
- {"2.setdebug", zsetdebug},
- {"3.type1encrypt", ztype1encrypt},
- {"3.type1decrypt", ztype1decrypt},
- {"0usertime", zusertime},
- op_def_end(0)
- };
-