4d36d22784
* NEW: Increment bytecode version. [INTERPRETER] * NEW: New routine to deal with the new immediate collection operator. The bytecode has changed consequently. [COMPILER] * NEW: A new syntax to the array operator to create collections: [ <key>:<value>, <key>:<value> ... ] [GB.EVAL] * NEW: Implement the new syntax for creating collections. git-svn-id: svn://localhost/gambas/trunk@1699 867c0c6c-44f3-4631-809d-bfa615b0a4ec
701 lines
14 KiB
C
701 lines
14 KiB
C
/***************************************************************************
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trans_expr.c
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Expression compiler
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(c) 2000-2007 Benoit Minisini <gambas@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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***************************************************************************/
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#define _TRANS_EXPR_C
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#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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#include <ctype.h>
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#include "gb_common.h"
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#include "gb_error.h"
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#include "gbc_compile.h"
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#include "gbc_trans.h"
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#include "gb_code.h"
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/*#define DEBUG*/
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//static bool _accept_statement = FALSE;
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static short get_nparam(PATTERN *tree, int *index, uint64_t *byref)
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{
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PATTERN pattern;
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short nparam = 0;
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int shift = 0;
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if (*index < (ARRAY_count(tree) - 1))
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{
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pattern = tree[*index + 1];
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if (PATTERN_is_param(pattern))
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{
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(*index)++;
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nparam = (short)PATTERN_index(pattern);
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}
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if (byref)
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*byref = 0;
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while (*index < (ARRAY_count(tree) - 1))
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{
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pattern = tree[*index + 1];
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if (!PATTERN_is_param(pattern))
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break;
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(*index)++;
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if (byref)
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{
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*byref |= (uint64_t)PATTERN_index(pattern) << shift;
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shift += 16;
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}
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}
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}
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/*
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Gère le cas où on a codé un subr sans mettre de parenthèses
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=> nparam = 0
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*/
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return nparam;
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}
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static void push_number(int index)
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{
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TRANS_NUMBER number;
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TRANS_DECL decl;
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if (TRANS_get_number(index, &number))
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THROW(E_SYNTAX);
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if (number.type == T_INTEGER)
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{
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CODE_push_number(number.ival);
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return;
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}
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CLEAR(&decl);
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decl.type = TYPE_make(number.type, 0, 0);
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decl.index = NO_SYMBOL;
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decl.value = index;
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if (number.type == T_LONG)
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decl.lvalue = number.lval;
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CODE_push_const(CLASS_add_constant(JOB->class, &decl));
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}
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static void push_string(int index, bool trans)
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{
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TRANS_DECL decl;
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SYMBOL *sym;
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int len;
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sym = TABLE_get_symbol(JOB->class->string, index);
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len = sym->len;
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if (len == 0)
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{
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CODE_push_null();
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}
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else if (len == 1 && !trans)
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{
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CODE_push_char(*(sym->name));
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}
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else
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{
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CLEAR(&decl);
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if (trans)
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decl.type = TYPE_make(T_CSTRING, 0, 0);
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else
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decl.type = TYPE_make(T_STRING, 0, 0);
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decl.index = NO_SYMBOL;
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decl.value = index;
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CODE_push_const(CLASS_add_constant(JOB->class, &decl));
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}
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}
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static void trans_class(int index)
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{
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const char *name;
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if (CLASS_exist_class(JOB->class, index))
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CODE_push_class(CLASS_add_class(JOB->class, index));
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else
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{
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name = TABLE_get_symbol_name(JOB->class->table, index);
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THROW("Unknown identifier: &1", name);
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}
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}
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static void trans_identifier(int index, boolean first, boolean point, PATTERN next)
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{
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CLASS_SYMBOL *sym = CLASS_get_symbol(JOB->class, index);
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bool is_static;
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bool is_func;
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int type;
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CONSTANT *constant;
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if (!TYPE_is_null(sym->local.type) && !point)
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{
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CODE_push_local(sym->local.value);
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}
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else if (!TYPE_is_null(sym->global.type) && !point)
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{
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type = TYPE_get_kind(sym->global.type);
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if (type == TK_CONST)
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{
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if (PATTERN_is_point(next))
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goto __CLASS;
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constant = &JOB->class->constant[sym->global.value];
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type = TYPE_get_id(constant->type);
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if (type == T_BYTE
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|| type == T_BOOLEAN
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|| type == T_SHORT
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|| type == T_INTEGER)
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{
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CODE_push_number(constant->value);
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}
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else
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CODE_push_const(sym->global.value);
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}
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else if (type == TK_EXTERN)
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{
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if (PATTERN_is_point(next))
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goto __CLASS;
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CODE_push_extern(sym->global.value);
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}
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/* That breaks some code if the property has the same name as a class!
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else if (type == TK_PROPERTY)
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{
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CODE_push_me(FALSE);
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CODE_push_unknown(CLASS_add_unknown(JOB->class, index));
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}*/
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else if (type == TK_EVENT || type == TK_LABEL || type == TK_PROPERTY)
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{
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goto __CLASS;
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}
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else /* TK_FUNCTION || TK_VARIABLE */
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{
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is_static = TYPE_is_static(sym->global.type);
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is_func = type == TK_FUNCTION;
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if (!is_static && TYPE_is_static(JOB->func->type))
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THROW("Dynamic symbols cannot be used in static function");
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if (is_func && PATTERN_is_point(next))
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goto __CLASS;
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else
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CODE_push_global(sym->global.value, is_static, is_func);
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}
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}
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else
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{
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/*index = CLASS_add_symbol(JOB->class, index);*/
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if (point)
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CODE_push_unknown(CLASS_add_unknown(JOB->class, index));
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/* Class must be declared now ! */
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else
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goto __CLASS;
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}
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return;
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__CLASS:
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trans_class(index);
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}
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static void trans_subr(int subr, short nparam)
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{
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SUBR_INFO *info = &COMP_subr_info[subr];
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if (subr == SUBR_VarPtr)
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{
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if (CODE_check_varptr())
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THROW("VarPtr() argument must be a dynamic, a static or a local variable");
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}
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if (nparam < info->min_param)
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THROW("Not enough arguments to &1()", info->name);
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else if (nparam > info->max_param)
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THROW("Too many arguments to &1()", info->name);
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CODE_subr(info->opcode, nparam, info->optype, FALSE /* output */, (info->max_param == info->min_param));
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}
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static void trans_operation(short op, short nparam, PATTERN previous)
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{
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COMP_INFO *info = &COMP_res_info[op];
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switch (info->value)
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{
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case OP_PT:
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if (nparam == 0)
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TRANS_use_with();
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else if (!PATTERN_is_identifier(previous))
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THROW(E_SYNTAX);
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break;
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case OP_EXCL:
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if (!PATTERN_is_identifier(previous))
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THROW(E_SYNTAX);
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break;
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case OP_LSQR:
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CODE_push_array(nparam);
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break;
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case OP_RSQR:
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TRANS_subr(TS_SUBR_ARRAY, nparam);
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break;
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case OP_COLON:
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TRANS_subr(TS_SUBR_COLLECTION, nparam);
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break;
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case OP_MINUS:
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if (nparam == 1)
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CODE_op(C_NEG, nparam, TRUE);
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else
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CODE_op(info->code, nparam, TRUE);
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break;
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default:
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CODE_op(info->code, nparam, (info->flag != RSF_OPN));
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}
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}
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static void trans_call(short nparam, uint64_t byref)
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{
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if (!byref)
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{
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CODE_call(nparam);
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return;
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}
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CODE_call_byref(nparam, byref);
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}
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static void trans_expr_from_tree(TRANS_TREE *tree)
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{
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int i, op;
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short nparam;
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int count;
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PATTERN pattern, next_pattern, prev_pattern;
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uint64_t byref;
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count = ARRAY_count(tree) - 1;
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pattern = NULL_PATTERN;
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for (i = 0; i <= count; i++)
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{
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prev_pattern = pattern;
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pattern = tree[i];
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if (i < count)
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next_pattern = tree[i + 1];
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else
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next_pattern = NULL_PATTERN;
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if (PATTERN_is_number(pattern))
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push_number(PATTERN_index(pattern));
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else if (PATTERN_is_string(pattern))
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push_string(PATTERN_index(pattern), FALSE);
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else if (PATTERN_is_tstring(pattern))
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push_string(PATTERN_index(pattern), TRUE);
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else if (PATTERN_is_identifier(pattern))
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trans_identifier(PATTERN_index(pattern), PATTERN_is_first(pattern), PATTERN_is_point(pattern), next_pattern);
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else if (PATTERN_is_class(pattern))
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trans_class(PATTERN_index(pattern));
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else if (PATTERN_is_subr(pattern))
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{
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nparam = get_nparam(tree, &i, NULL);
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trans_subr(PATTERN_index(pattern), nparam);
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}
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else if (PATTERN_is_reserved(pattern))
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{
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if (PATTERN_is(pattern, RS_TRUE))
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{
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CODE_push_boolean(TRUE);
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}
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else if (PATTERN_is(pattern, RS_FALSE))
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{
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CODE_push_boolean(FALSE);
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}
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else if (PATTERN_is(pattern, RS_NULL))
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{
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CODE_push_null();
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}
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else if (PATTERN_is(pattern, RS_ME))
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{
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/*if (FUNCTION_is_static(JOB->func))
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THROW("ME cannot be used in a static function");*/
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CODE_push_me(FALSE);
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}
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else if (PATTERN_is(pattern, RS_SUPER))
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{
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/*if (FUNCTION_is_static(JOB->func))
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THROW("ME cannot be used in a static function");*/
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CODE_push_super(FALSE);
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}
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else if (PATTERN_is(pattern, RS_LAST))
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{
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CODE_push_last();
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}
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else if (PATTERN_is(pattern, RS_AT))
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{
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if (!CODE_popify_last())
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THROW("This expression cannot be passed by reference");
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}
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else if (PATTERN_is(pattern, RS_COMMA))
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{
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CODE_drop();
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}
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else if (PATTERN_is(pattern, RS_ERROR))
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{
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TRANS_subr(TS_SUBR_ERROR, 0);
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}
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else if (PATTERN_is(pattern, RS_OPTIONAL))
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{
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CODE_push_void();
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}
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else
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{
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op = PATTERN_index(pattern);
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if (op == RS_LBRA)
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{
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nparam = get_nparam(tree, &i, &byref);
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trans_call(nparam, byref);
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}
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else
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{
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nparam = get_nparam(tree, &i, NULL);
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trans_operation((short)op, nparam, prev_pattern);
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}
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}
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}
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}
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}
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PUBLIC void TRANS_new(void)
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{
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int index;
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int i, nparam;
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boolean array = FALSE;
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boolean event = FALSE;
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boolean collection = FALSE;
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bool check_param = FALSE;
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nparam = 0;
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if (PATTERN_is_class(*JOB->current))
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{
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index = CLASS_add_class(JOB->class, PATTERN_index(*JOB->current));
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if (PATTERN_is(JOB->current[1], RS_LSQR))
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index = CLASS_get_array_class(JOB->class, T_OBJECT, index);
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CODE_push_class(index);
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nparam = 1;
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}
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else if (PATTERN_is_type(*JOB->current))
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{
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if (!PATTERN_is(JOB->current[1], RS_LSQR))
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THROW("Cannot instanciate native types");
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//CODE_push_number(RES_get_type(PATTERN_index(*JOB->current)));
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CODE_push_class(CLASS_get_array_class(JOB->class, RES_get_type(PATTERN_index(*JOB->current)), -1));
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nparam = 1;
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}
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else if (PATTERN_is(*JOB->current, RS_LBRA))
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{
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/* NEW ("Class", ...) */
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nparam = 0;
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JOB->current--;
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check_param = TRUE;
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}
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else
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THROW(E_SYNTAX);
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JOB->current++;
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if (PATTERN_is(*JOB->current, RS_LSQR))
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{
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if (collection)
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THROW("Array declaration is forbidden with typed collection");
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JOB->current++;
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if (!PATTERN_is(*JOB->current, RS_RSQR))
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{
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for (i = 0;; i++)
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{
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if (i > MAX_ARRAY_DIM)
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THROW("Too many dimensions");
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TRANS_expression(FALSE);
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nparam++;
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if (PATTERN_is(*JOB->current, RS_RSQR))
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break;
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if (!PATTERN_is(*JOB->current, RS_COMMA))
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THROW("Missing ']'");
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JOB->current++;
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}
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}
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JOB->current++;
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array = TRUE;
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}
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else
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{
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if (PATTERN_is(*JOB->current, RS_LBRA))
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{
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JOB->current++;
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for(;;)
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{
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if (nparam > MAX_PARAM_FUNC)
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THROW("Too many arguments");
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if (PATTERN_is(*JOB->current, RS_AT) || PATTERN_is(*JOB->current, RS_BYREF))
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THROW("NEW cannot have arguments passed by reference");
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TRANS_expression(FALSE);
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nparam++;
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if (PATTERN_is(*JOB->current, RS_RBRA))
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break;
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if (!PATTERN_is(*JOB->current, RS_COMMA))
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THROW("Missing ')'");
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JOB->current++;
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}
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JOB->current++;
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if (check_param && nparam == 0)
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THROW("Not enough argument to New()");
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}
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if (PATTERN_is(*JOB->current, RS_AS))
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{
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JOB->current++;
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TRANS_expression(FALSE);
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nparam++;
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event = TRUE;
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}
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/*
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CODE_call(nparam, FALSE);
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CODE_drop();
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*/
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}
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if (collection)
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CODE_new(nparam, TRUE, event);
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else
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CODE_new(nparam, array, event);
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}
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PUBLIC void TRANS_expression(boolean check_statement)
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{
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TRANS_TREE *tree;
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tree = TRANS_tree(check_statement);
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trans_expr_from_tree(tree);
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ARRAY_delete(&tree);
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if (check_statement)
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{
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/*
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if (!CODE_check_statement_last())
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THROW("This expression cannot be a statement");
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*/
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CODE_drop();
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}
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}
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PUBLIC void TRANS_ignore_expression()
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{
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TRANS_TREE *tree = TRANS_tree(FALSE);
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ARRAY_delete(&tree);
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}
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PUBLIC void TRANS_reference(void)
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{
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TRANS_expression(FALSE);
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if (!CODE_popify_last())
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THROW("Invalid assignment");
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}
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PUBLIC boolean TRANS_affectation(bool dup)
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{
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static TRANS_STATEMENT statement[] = {
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//{ RS_NEW, TRANS_new },
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{ RS_OPEN, TRANS_open },
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{ RS_SHELL, TRANS_shell },
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{ RS_EXEC, TRANS_exec },
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{ RS_RAISE, TRANS_raise },
|
|
{ RS_PIPE, TRANS_pipe },
|
|
{ RS_LOCK, TRANS_lock },
|
|
{ RS_NONE, NULL }
|
|
};
|
|
|
|
TRANS_STATEMENT *st;
|
|
PATTERN *look = JOB->current;
|
|
PATTERN *left, *expr, *after;
|
|
int niv = 0;
|
|
bool equal = FALSE;
|
|
bool stat = FALSE;
|
|
int op;
|
|
|
|
for(;;)
|
|
{
|
|
if (PATTERN_is_newline(*look) || PATTERN_is_end(*look))
|
|
break;
|
|
|
|
if (PATTERN_is(*look, RS_LBRA) || PATTERN_is(*look, RS_LSQR))
|
|
{
|
|
niv++;
|
|
}
|
|
else if (PATTERN_is(*look, RS_RBRA) || PATTERN_is(*look, RS_RSQR))
|
|
{
|
|
if (niv > 0)
|
|
niv--;
|
|
}
|
|
else if (niv == 0)
|
|
{
|
|
if (PATTERN_is(*look, RS_EQUAL))
|
|
{
|
|
equal = TRUE;
|
|
op = RS_NONE;
|
|
break;
|
|
}
|
|
else if (PATTERN_is_reserved(*look) && RES_is_assignment(PATTERN_index(*look)))
|
|
{
|
|
equal = TRUE;
|
|
op = RES_get_assignment_operator(PATTERN_index(*look));
|
|
break;
|
|
}
|
|
}
|
|
|
|
look++;
|
|
}
|
|
|
|
if (!equal)
|
|
return FALSE;
|
|
|
|
left = JOB->current;
|
|
*look++ = PATTERN_make(RT_NEWLINE, 0);
|
|
expr = look;
|
|
|
|
JOB->current = expr;
|
|
|
|
if (op == RS_NONE && (PATTERN_is_reserved(*JOB->current)))
|
|
{
|
|
if (PATTERN_is(*JOB->current, RS_NEW))
|
|
{
|
|
JOB->current++;
|
|
TRANS_in_affectation++;
|
|
TRANS_new();
|
|
TRANS_in_affectation--;
|
|
stat = TRUE;
|
|
}
|
|
else
|
|
{
|
|
for (st = statement; st->id; st++)
|
|
{
|
|
if (PATTERN_is(*JOB->current, st->id))
|
|
{
|
|
JOB->current++;
|
|
TRANS_in_affectation++;
|
|
(*st->func)();
|
|
TRANS_in_affectation--;
|
|
stat = TRUE;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!stat)
|
|
{
|
|
if (op != RS_NONE)
|
|
{
|
|
JOB->current = left;
|
|
TRANS_expression(FALSE);
|
|
}
|
|
|
|
JOB->current = expr;
|
|
TRANS_expression(FALSE);
|
|
after = JOB->current;
|
|
|
|
if (op != RS_NONE)
|
|
trans_operation(op, 2, NULL_PATTERN);
|
|
}
|
|
|
|
after = JOB->current;
|
|
|
|
if (dup)
|
|
CODE_dup();
|
|
|
|
JOB->current = left;
|
|
TRANS_reference();
|
|
|
|
JOB->current = after;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|