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/*
* cook - file construction tool
* Copyright (C) 1997, 1999 Peter Miller;
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* MANIFEST: functions to manipulate builtin IDs
*/
#include <expr/position.h>
#include <builtin/private.h>
#include <id/builtin.h>
#include <id/private.h>
#include <opcode/context.h>
#include <str_list.h>
#include <trace.h>
typedef struct id_builtin_ty id_builtin_ty;
struct id_builtin_ty
{
id_ty inherited;
builtin_ty *value;
};
/*
* NAME
* destructor
*
* SYNOPSIS
* void destructor(id_ty *);
*
* DESCRIPTION
* The destructor function is used to release the resources held by
* an ID instance.
*/
static void destructor _((id_ty *));
static void
destructor(idp)
id_ty *idp;
{
}
/*
* NAME
* interpret
*
* SYNOPSIS
* int interpret(id_ty *, const string_list_ty *, string_list_ty *);
*
* DESCRIPTION
* The interpret function is used to evaluate an ID instance (there
* are several types). The arguments to the evaluation are not to
* be changed, the results are only to be appended (not
* constructor'ed first).
*
* RETURNS
* int; 0 on success, -1 on error.
*/
static int interpret _((id_ty *, opcode_context_ty *,
const expr_position_ty *));
static int
interpret(idp, ocp, pp)
id_ty *idp;
opcode_context_ty *ocp;
const expr_position_ty *pp;
{
int status;
id_builtin_ty *this;
string_list_ty *input;
string_list_ty output;
/*
* fetch the input arguments
*/
trace(("id_builtin::interpret(idp = %08lX)\n{\n", (long)idp));
this = (id_builtin_ty *)idp;
input = opcode_context_string_list_pop(ocp);
/*
* call the builtin function
*/
string_list_constructor(&output);
status = builtin_interpret(this->value, &output, input, pp, ocp);
/*
* push the return value ono the value stask
*/
opcode_context_string_push_list(ocp, &output);
/*
* clean up and go home
*/
string_list_delete(input);
string_list_destructor(&output);
trace(("return %d;\n", status));
trace(("}\n"));
return status;
}
/*
* NAME
* script
*
* SYNOPSIS
* int script(id_ty *, const string_list_ty *, string_list_ty *);
*
* DESCRIPTION
* The script function is used to evaluate an ID instance (there
* are several types). The arguments to the evaluation are not to
* be changed, the results are only to be appended (not
* constructor'ed first).
*
* RETURNS
* int; 0 on success, -1 on error.
*/
static int script _((id_ty *, opcode_context_ty *,
const expr_position_ty *));
static int
script(idp, ocp, pp)
id_ty *idp;
opcode_context_ty *ocp;
const expr_position_ty *pp;
{
int status;
id_builtin_ty *this;
string_list_ty *input;
string_list_ty output;
/*
* fetch the input arguments
*/
trace(("id_builtin::script(idp = %08lX)\n{\n", (long)idp));
this = (id_builtin_ty *)idp;
input = opcode_context_string_list_pop(ocp);
/*
* call the builtin function
*/
string_list_constructor(&output);
status = builtin_script(this->value, &output, input, pp, ocp);
/*
* push the return value ono the value stask
*/
opcode_context_string_push_list(ocp, &output);
/*
* clean up and go home
*/
string_list_delete(input);
string_list_destructor(&output);
trace(("return %d;\n", status));
trace(("}\n"));
return status;
}
/*
* NAME
* method
*
* DESCRIPTION
* The method builtin describes this ID class.
*
* CAVEAT
* This symbol is not to be exported from this file (its name is
* not unique).
*/
static id_method_ty method =
{
"builtin function",
sizeof(id_builtin_ty),
destructor,
interpret,
script,
};
/*
* NAME
* id_builtin_new
*
* SYNOPSIS
* void id_builtin_new(void);
*
* DESCRIPTION
* The id_builtin_new function is used to create a new instance of
* a builtin ID's value. The given value is copied.
*
* RETURNS
* id_ty *; a pointer to a ID instance is dynamic memory.
*
* CAVEAT
* Use id_instance_delete when you are done with it.
*/
id_ty *
id_builtin_new(bp)
builtin_ty *bp;
{
id_ty *idp;
id_builtin_ty *this;
trace(("id_builtin::new()\n{\n"/*}*/));
idp = id_instance_new(&method);
this = (id_builtin_ty *)idp;
this->value = bp;
trace(("return %08lX;\n", (long)idp));
trace((/*{*/"}\n"));
return idp;
}
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