2fbf67cb29
* NEW: Update FSF address in every source file. git-svn-id: svn://localhost/gambas/trunk@3870 867c0c6c-44f3-4631-809d-bfa615b0a4ec
599 lines
12 KiB
C
599 lines
12 KiB
C
/***************************************************************************
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eval_trans_expr.c
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(c) 2000-2011 Benoît 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 2, 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., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA.
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***************************************************************************/
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#define __EVAL_TRANS_EXPR_C
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#define PROJECT_EXEC
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#include "gb_common.h"
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#include <ctype.h>
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#include "gb_error.h"
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#include "gb_reserved.h"
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#include "gb_code.h"
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#include "eval_trans.h"
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#include "eval.h"
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/*#define DEBUG*/
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static int subr_array_index = -1;
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static int subr_collection_index = -1;
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static void find_subr(int *index, const char *name)
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{
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if (*index < 0)
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*index = RESERVED_find_subr(name, strlen(name));
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}
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static short get_nparam(PATTERN *tree, int *index)
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{
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PATTERN pattern;
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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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return (short)PATTERN_index(pattern);
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}
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}
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/*
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G<>e le cas o on a cod<6F>un subr sans mettre de parenth<74>es
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=> nparam = 0
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*/
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return 0;
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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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CLASS_CONST cst;
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SYMBOL *sym;
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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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sym = TABLE_get_symbol(EVAL->table, index);
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cst.type = number.type;
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if (cst.type == T_FLOAT)
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cst._float.value = number.dval;
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else if (cst.type == T_LONG)
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cst._long.value = number.lval;
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CODE_push_const(EVAL_add_constant(&cst));
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}
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static void push_string(int index, bool trans)
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{
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CLASS_CONST cst;
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SYMBOL *sym;
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int len;
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if (index == VOID_STRING)
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len = 0;
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else
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{
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sym = TABLE_get_symbol(EVAL->string, index);
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len = sym->len;
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}
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if (len == 0)
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{
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CODE_push_void_string();
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}
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else if (len == 1)
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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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cst.type = trans ? T_CSTRING : T_STRING;
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cst._string.addr = sym->name;
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cst._string.len = len;
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CODE_push_const(EVAL_add_constant(&cst));
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}
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}
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/*
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static void push_class(int index)
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{
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TRANS_DECL decl;
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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_class(CLASS_add_constant(EVAL->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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SYMBOL *sym = TABLE_get_symbol(EVAL->table, index);
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if (GB.ExistClassLocal(sym->name))
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CODE_push_class(EVAL_add_class(sym->name));
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else
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{
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THROW("Unknown class");
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}
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}
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static void trans_identifier(int index, bool first, bool point)
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{
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SYMBOL *sym = TABLE_get_symbol(EVAL->table, index);
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/* z<>o terminal */
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sym->name[sym->len] = 0;
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if (point)
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{
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CODE_push_unknown(EVAL_add_unknown(sym->name));
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}
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else if (first && GB.ExistClassLocal(sym->name))
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{
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//printf("%.*s %s\n", sym->symbol.len, sym->symbol.name, isupper(*sym->symbol.name) ? "U" : "l");
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CODE_push_class(EVAL_add_class(sym->name));
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}
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else
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{
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CODE_push_local(EVAL_add_variable(index));
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}
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}
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static void trans_subr(int subr, short nparam, bool output)
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{
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SUBR_INFO *info = &COMP_subr_info[subr];
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//fprintf(stderr, "trans_subr: %d: %s: %d %d\n", subr, info->name, info->min_param, info->max_param);
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if (nparam < info->min_param)
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THROW2("Not enough arguments to &1()", info->name);
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else if (nparam > info->max_param)
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THROW2("Too many arguments to &1()", info->name);
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CODE_subr(info->opcode, nparam, info->optype, output, (info->max_param == info->min_param));
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}
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void TRANS_operation(short op, short nparam, bool output, 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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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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find_subr(&subr_array_index, ".Array");
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trans_subr(subr_array_index, nparam, FALSE);
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break;
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case OP_COLON:
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find_subr(&subr_collection_index, ".Collection");
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trans_subr(subr_collection_index, nparam, FALSE);
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break;
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case OP_LBRA:
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CODE_call(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, 0, nparam, TRUE);
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else
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CODE_op(info->code, info->subcode, nparam, TRUE);
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break;
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default:
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CODE_op(info->code, info->subcode, nparam, (info->flag != RSF_OPN));
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}
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}
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static void trans_expr_from_tree(PATTERN *tree)
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{
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int i;
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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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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));
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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);
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trans_subr(PATTERN_index(pattern), nparam, PATTERN_is_output(pattern));
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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(EVAL->func))
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THROW("ME cannot be used in a static function");*/
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CODE_push_me(TRUE);
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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(EVAL->func))
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THROW("ME cannot be used in a static function");*/
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CODE_push_super(TRUE);
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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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/*
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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("Invalid output parameter");
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}
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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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nparam = get_nparam(tree, &i);
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TRANS_operation((short)PATTERN_index(pattern), nparam, PATTERN_is_output(pattern), prev_pattern);
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}
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}
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}
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}
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#if 0
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static 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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bool array = FALSE;
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bool event = FALSE;
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bool collection = FALSE;
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if (PATTERN_is_identifier(*EVAL->current))
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{
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index = PATTERN_index(*EVAL->current);
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CODE_push_class(CLASS_add_class(EVAL->class, index));
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nparam = 1;
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}
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else if (PATTERN_is_type(*EVAL->current))
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{
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if (PATTERN_is(EVAL->current[1], RS_LSQR))
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{
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CODE_push_number(RES_get_type(PATTERN_index(*EVAL->current)));
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nparam = 1;
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}
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else
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THROW("Cannot instanciate native types");
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}
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EVAL->current++;
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if (PATTERN_is(*EVAL->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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EVAL->current++;
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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(*EVAL->current, RS_RSQR))
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break;
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if (!PATTERN_is(*EVAL->current, RS_COMMA))
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THROW("Comma missing");
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EVAL->current++;
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}
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EVAL->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(*EVAL->current, RS_LBRA))
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{
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EVAL->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(*EVAL->current, RS_AT))
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THROW("NEW cannot have output parameters");
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TRANS_expression(FALSE);
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nparam++;
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if (PATTERN_is(*EVAL->current, RS_RBRA))
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break;
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if (!PATTERN_is(*EVAL->current, RS_COMMA))
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THROW("Comma missing");
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EVAL->current++;
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}
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EVAL->current++;
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}
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if (PATTERN_is(*EVAL->current, RS_AS))
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{
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EVAL->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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#endif
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void TRANS_expression()
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{
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TRANS_tree();
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trans_expr_from_tree(EVAL->tree);
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ARRAY_delete(&EVAL->tree);
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}
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void TRANS_reference(void)
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{
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TRANS_expression();
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if (!CODE_popify_last())
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THROW("Invalid assignment");
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EVAL->assign_code = EVAL->code[EVAL->ncode - 1];
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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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CODE_op(info->code, info->subcode, nparam, (info->flag != RSF_OPN));
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}
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bool TRANS_affectation(void)
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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 },
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{ RS_PIPE, TRANS_pipe },
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{ RS_LOCK, TRANS_lock },
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{ RS_NONE, NULL }
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};*/
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//TRANS_STATEMENT *st;
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PATTERN *look = EVAL->current;
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PATTERN *left, *expr, *after;
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int niv = 0;
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bool equal = FALSE;
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//bool stat = FALSE;
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int op;
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for(;;)
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{
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if (PATTERN_is_newline(*look) || PATTERN_is_end(*look))
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break;
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if (PATTERN_is(*look, RS_LBRA) || PATTERN_is(*look, RS_LSQR))
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{
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niv++;
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}
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else if (PATTERN_is(*look, RS_RBRA) || PATTERN_is(*look, RS_RSQR))
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{
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if (niv > 0)
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niv--;
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}
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else if (niv == 0)
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{
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if (PATTERN_is(*look, RS_EQUAL))
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{
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equal = TRUE;
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op = RS_NONE;
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break;
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}
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else if (PATTERN_is_reserved(*look) && RES_is_assignment(PATTERN_index(*look)))
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{
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equal = TRUE;
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op = RES_get_assignment_operator(PATTERN_index(*look));
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break;
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}
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}
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look++;
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}
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if (!equal)
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return FALSE;
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left = EVAL->current;
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*look++ = PATTERN_make(RT_NEWLINE, 0);
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expr = look;
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EVAL->current = expr;
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/*if (op == RS_NONE && (PATTERN_is_reserved(*EVAL->current)))
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{
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if (PATTERN_is(*EVAL->current, RS_NEW))
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{
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EVAL->current++;
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TRANS_in_affectation++;
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TRANS_new();
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TRANS_in_affectation--;
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stat = TRUE;
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}
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else
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{
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for (st = statement; st->id; st++)
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{
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if (PATTERN_is(*EVAL->current, st->id))
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{
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EVAL->current++;
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TRANS_in_affectation++;
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(*st->func)();
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TRANS_in_affectation--;
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stat = TRUE;
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}
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}
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}
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}*/
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//if (!stat)
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//{
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if (op != RS_NONE)
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{
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EVAL->current = left;
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TRANS_expression();
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}
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EVAL->current = expr;
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TRANS_expression();
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after = EVAL->current;
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if (op != RS_NONE)
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trans_operation(op, 2, NULL_PATTERN);
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//}
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after = EVAL->current;
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/*if (dup)
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CODE_dup();*/
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CODE_dup(); // So that Assign() returns the assigned value
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EVAL->current = left;
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TRANS_reference();
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EVAL->current = after;
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return TRUE;
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}
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