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/*
* cook - file construction tool
* Copyright (C) 1997, 1999, 2001 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 string opcodes
*/
#include <ac/stdio.h>
#include <expr/position.h>
#include <opcode/context.h>
#include <match.h>
#include <opcode/private.h>
#include <opcode/string.h>
#include <str.h>
#include <trace.h>
typedef struct opcode_string_ty opcode_string_ty;
struct opcode_string_ty
{
opcode_ty inherited;
string_ty *value;
expr_position_ty pos;
};
/*
* NAME
* destructor
*
* SYNOPSIS
* void destructor(opcode_ty *);
*
* DESCRIPTION
* The destructor function is used to release resources held by
* this opcode. Do not free the opcode itself, this is done by the
* base class.
*/
static void destructor _((opcode_ty *));
static void
destructor(op)
opcode_ty *op;
{
opcode_string_ty *this;
trace(("opcode_string::destructor()\n{\n"/*}*/));
this = (opcode_string_ty *)op;
str_free(this->value);
expr_position_destructor(&this->pos);
trace((/*{*/"}\n"));
}
/*
* NAME
* execute
*
* SYNOPSIS
* opcode_status_ty execute(opcode_ty *, opcode_context_ty *);
*
* DESCRIPTION
* The execute function is used to execute the given opcode within
* the given interpretation context.
*
* RETURNS
* opcode_status_ty to indicate the result of the execution
*/
static opcode_status_ty execute _((const opcode_ty *, opcode_context_ty *));
static opcode_status_ty
execute(op, icp)
const opcode_ty *op;
opcode_context_ty *icp;
{
const opcode_string_ty *this;
const match_ty *mp;
trace(("opcode_string::execute()\n{\n"/*}*/));
this = (const opcode_string_ty *)op;
/*
* If a wildcard mapping is in force (we are performing
* actions bound to an implicit recipe) the word will be
* mapped before it is returned.
*/
mp = opcode_context_match_top(icp);
if (mp)
{
string_ty *s;
s = match_reconstruct_rhs(mp, this->value, &this->pos);
if (!s)
{
trace(("return error;\n"));
trace((/*{*/"}\n"));
return opcode_status_error;
}
opcode_context_string_push(icp, s);
str_free(s);
}
else
opcode_context_string_push(icp, this->value);
trace(("return success;\n"));
trace((/*{*/"}\n"));
return opcode_status_success;
}
/*
* NAME
* disassemble
*
* SYNOPSIS
* void disassemble(opcode_ty *);
*
* DESCRIPTION
* The disassemble function is used to disassemble the copdode and
* its arguments onto the standard output. Don't worry about the
* location or a trailing newline.
*/
static void disassemble _((const opcode_ty *));
static void
disassemble(op)
const opcode_ty *op;
{
const opcode_string_ty *this;
string_ty *s;
trace(("opcode_string::disassemle()\n{\n"/*}*/));
this = (const opcode_string_ty *)op;
s = str_quote_cook(this->value, '"');
printf("%s", s->str_text);
str_free(s);
trace((/*{*/"}\n"));
}
/*
* NAME
* method
*
* DESCRIPTION
* The method variable describes this class.
*
* CAVEAT
* This symbol is not exported from this file.
*/
static opcode_method_ty method =
{
"string",
sizeof(opcode_string_ty),
destructor,
execute,
execute, /* script */
disassemble,
};
/*
* NAME
* opcode_string_new
*
* SYNOPSIS
* opcode_ty *opcode_string_new(void);
*
* DESCRIPTION
* The opcode_string_new function is used to allocate a new instance
* of a string opcode.
*
* RETURNS
* opcode_ty *; use opcode_delete when you are finished with it.
*/
opcode_ty *
opcode_string_new(s, pp)
string_ty *s;
const expr_position_ty *pp;
{
opcode_ty *op;
opcode_string_ty *this;
trace(("opcode_string_new()\n{\n"/*}*/));
op = opcode_new(&method);
this = (opcode_string_ty *)op;
this->value = str_copy(s);
expr_position_copy_constructor(&this->pos, pp);
trace(("return %08lX;\n", (long)op));
trace((/*{*/"}\n"));
return op;
}
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