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Overview
Comment: | initial version |
---|---|
Timelines: | family | ancestors | descendants | both | trunk |
Files: | files | file ages | folders |
SHA1: |
e043a13a98ab8abc18c4e31d7c2a4842 |
User & Date: | arnulf 2012-04-19 09:45:34.793 |
Context
2012-04-19
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13:02 | initial version check-in: 45969a1e49 user: arnulf tags: trunk | |
09:45 | initial version check-in: e043a13a98 user: arnulf tags: trunk | |
09:45 | fixes and debug stuff check-in: bbfafd8d55 user: arnulf tags: trunk | |
Changes
Added src/org/apwtcl/lang/cmd/ForCommand.java.
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Wiedemann * */ package org.apwtcl.lang.cmd; import java.util.ArrayList; import org.apwtcl.lang.CallFrame; import org.apwtcl.lang.Command; import org.apwtcl.lang.Interp; import org.apwtcl.lang.ApwtclObj; import org.apwtcl.lang.Token; public class ForCommand extends Token { /* ==================== ForCommand ================================== */ public ForCommand() { } /* ==================== forCmd ================================== */ public int forCmd(Interp interp, ArrayList<ApwtclObj> args) { //print("for called!"+args+"!"); int retval; int bool = 1; ArrayList<Integer> bool_ptr = new ArrayList<Integer>(); ApwtclObj var_name_ptr = null; ApwtclObj stop_var_name_ptr = null; boolean evalstart = false; boolean evalnext = false; boolean out = false; boolean testcond = false; if (args.size() != 5) { interp.wrongNumArgs(1, args, "start test next body"); return ERROR; } /* Do the initialisation */ if ((retval = interp.eval_statement.evalObj(args.get(1))) != OK) { return retval; } /* And do the first test now. Better for optimisation * if we can do next/test at the bottom of the loop */ retval = interp.eval_expression.getBoolFromExpr(args.get(2), bool_ptr); bool = bool_ptr.get(0); /* Ready to do the body as follows: * while (1) { * body // check retcode * next // check retcode * test // check retcode/test bool * } */ /* if (false) { /* Check if the for is on the form: * for ... {$i < CONST} {incr i} * for ... {$i < $j} {incr i} */ /* if (retval == interp.OK && bool_ptr) { var incr_script; var expr; var stop = new Array(); var current_val = new Array(); var proc_epoch; var obj_ptr; var cmp_offset; /* Do it only if there aren't shared arguments */ /* expr = interp.eval_expression.getExpression(args[2]); incr_script = interp.script_obj_type.getScript(args[3]); /* Ensure proper lengths to start */ /* if (incr_script.len != 3 || !expr || expr.len != 3) { evalstart = true; } /* Ensure proper token types. */ /* if (!evalstart) { if (incr_script.script_object.tokens[1].token != interp.TOKEN_ESC || expr.token_list[0].token != interp.TOKEN_VAR || (expr.token_list[1].token != interp.TOKEN_EXPR_INT && expr.token_list[1].token != interp.TOKEN_VAR)) { evalstart = true; } } if (!evalstart) { if (expr.token_list[2].token == interp.TOKEN_EXPROP_LT) { cmp_offset = 0; } else { if (expr.token_list[2].token == interp.TOKEN_EXPROP_LTE) { cmp_offset = 1; } else { evalstart = true; } } } if (!evalstart) { /* Update command must be incr */ /* if (!incr_script.script_object.tokens[1].obj_ptr.getString() == "incr") { evalstart = true; } } /* incr, expression must be about the same variable */ /* if (!evalstart) { if (!interp.string_obj_type.stringEqObj(incr_script.script_object.tokens[2].obj_ptr, expr.token_list[0].obj_ptr)) { evalstart = true; } } /* Get the stop condition (must be a variable or integer) */ /* if (!evalstart) { if (expr.token_list[1].tken == interp.TOKEN_EXPR_INT) { if (interp.default_obj.getWide(expr.token_list[1].obj_ptr, stop) == interp.ERROR) { evalstart = true; } stop = stop[0]; } else { stop_var_name_ptr = expr.token_list[1].obj_ptr; stop_var_name_ptr.incrRefCount("I_PKG_CORECMD_2"); /* Keep the compiler happy */ /* stop = 0; } } if (!evalstart) { /* Initialization */ /* proc_epoch = interp.proc_epoch; var_name_ptr = expr.token_list[0].obj_ptr; var_name_ptr.incrRefCount("I_PKG_CORECMD_3"); obj_ptr = interp.variable_obj_type.getVariable(var_name_ptr, interp.FUNCTION_FLAGS_NONE); current_val = new Array(); if (obj_ptr == null || interp.default_obj.getWide(obj_ptr, current_val) != interp.OK) { testcond = true; } current_val = current_val[0]; } if (!testcond) { /* --- OPTIMIZED FOR --- */ /* while (retval == interp.OK) { /* === Check condition === */ /* Note that currentVal is already set here */ /* Immediate or Variable? get the 'stop' value if the latter. */ /* if (stop_var_name_ptr) { obj_ptr = interp.variable_obj_type.getVariable(stop_var_name_ptr, interp.FUNCTION_FLAGS_NONE); if (obj_ptr == null || interp.default_obj.getWide(obj_ptr, stop) != interp.OK) { testcond = true; break; } } if (current_val >= stop + cmp_offset) { break; } /* Eval body */ /* retval = interp.eval_statement.evalObj(args[4]); if (retval == interp.OK || retval == interp.CONTINUE) { retval = interp.OK; /* If there was a change in procedures/command continue * with the usual [for] command implementation */ /* if (proc_epoch != interp.proc_epoch) { evalnext = true; } if (!evalnext) { obj_ptr = interp.variable_obj_type.getVariable(var_name_ptr, interp.FUNCTION_FLAGS_LEAVE_ERRMSG); /* Increment */ /* if (obj_ptr == null) { retval = interp.ERROR; out = true; break; } if (!obj_ptr.isShared() && obj_ptr.obj_type == interp.int_obj_type) { currentVal = ++interp.default_obj.wideValue(obj_ptr); obj_ptr.invalidateStringRep(); } else { current_value = new Array(); if (interp.default_obj.getWide(obj_ptr, current_val) != interp.OK || interp.variable_obj_type.setVariable(var_name_ptr, interp.int_obj_type.newIntObj(++current_val[0])) != interp.OK) { evalnext = true; } } } } } out = true; } } } */ evalstart = true; evalnext = true; testcond = true; if (evalstart) { while (bool != 0 && (retval == OK || retval == CONTINUE)) { /* Body */ retval = interp.eval_statement.evalObj(args.get(4)); if (retval == OK || retval == CONTINUE) { /* increment */ if (evalnext) { retval = interp.eval_statement.evalObj(args.get(3)); if (retval == OK || retval == CONTINUE) { /* test */ if (testcond) { bool_ptr = new ArrayList<Integer>(); retval = interp.eval_expression.getBoolFromExpr(args.get(2), bool_ptr); bool = bool_ptr.get(0); } } } } } } if (out) { if (stop_var_name_ptr != null) { stop_var_name_ptr.decrRefCount("D_PKG_CORE_CMD_3"); } } if (var_name_ptr != null) { var_name_ptr.decrRefCount("D_PKG_CORE_CMD_4"); } if (retval == CONTINUE || retval == BREAK || retval == OK) { interp.setEmptyResult(); return OK; } return retval; } } |