/* Copyright (C) 1989, 1990, 1991 Aladdin Enterprises. All rights reserved. Distributed by Free Software Foundation, Inc. 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. */ /* zstring.c */ /* String operators for GhostScript */ #include "memory_.h" #include "ghost.h" #include "alloc.h" #include "errors.h" #include "iutil.h" #include "name.h" #include "oper.h" #include "store.h" #include "stream.h" /* The generic operators (copy, get, put, getinterval, putinterval, */ /* length, and forall) are implemented in zgeneric.c. */ /* Imported operators */ extern int ztoken_file(P1(os_ptr)); /* string */ int zstring(register os_ptr op) { byte *sbody; uint size; check_type(*op, t_integer); if ( op->value.intval < 0 || (ulong)(op->value.intval) > max_uint ) return e_rangecheck; size = op->value.intval; sbody = (byte *)alloc(size, 1, "string"); if ( sbody == 0 ) return e_VMerror; make_tasv(op, t_string, a_all, size, bytes, sbody); memset(sbody, 0, size); return 0; } /* anchorsearch */ 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) ) { *op = *op1; r_set_size(op, size); op1->value.bytes += size; r_inc_size(op1, -size); push(1); make_bool(op, 1); } else make_bool(op, 0); return 0; } /* search */ 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_bool(op, 0); 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(1); *op = *op1; r_set_size(op, ptr - op->value.bytes); op1->value.bytes = ptr + size; r_set_size(op1, count); push(1); make_bool(op, 1); return 0; } ptr++; } while ( count-- ); /* No match */ make_bool(op, 0); return 0; } /* stringmatch */ int zstringmatch(register os_ptr op) { os_ptr op1 = op - 1; int result; ref stref; check_read_type(*op, t_string); switch ( r_type(op1) ) { case t_string: check_read(*op1); ref_assign(&stref, op1); goto cmp; case t_name: name_string_ref(op1, &stref); cmp: result = string_match(stref.value.bytes, r_size(&stref), op->value.bytes, r_size(op), 0); break; default: result = (r_size(op) == 1 && *op->value.bytes == '*'); } make_bool(op1, result); pop(1); return 0; } /* token */ int ztoken(register os_ptr op) { stream st; stream *s = &st; int code; ref token; switch ( r_type(op) ) { default: return e_typecheck; case t_file: return ztoken_file(op); case t_string: ; } check_read(*op); sread_string(s, op->value.bytes, r_size(op)); switch ( code = scan_token(s, 1, &token) ) { case 0: /* read a token */ { uint pos = stell(s); op->value.bytes += pos; r_inc_size(op, -pos); } push(2); op[-1] = token; make_bool(op, 1); return 0; case 1: /* no tokens */ make_bool(op, 0); return 0; default: /* error */ return code; } } /* ------ Initialization procedure ------ */ op_def zstring_op_defs[] = { {"2anchorsearch", zanchorsearch}, {"2search", zsearch}, {"1string", zstring}, {"2stringmatch", zstringmatch}, {"1token", ztoken}, op_def_end(0) };