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/*
* Copyright (C) 2012-2015 Robin Haberkorn
*
* 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 3 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, see <http://www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <glib.h>
#include <glib/gprintf.h>
#include "sciteco.h"
#include "string-utils.h"
#include "expressions.h"
#include "parser.h"
#include "undo.h"
#include "goto.h"
namespace SciTECO {
namespace States {
StateLabel label;
StateGotoCmd gotocmd;
}
namespace Goto {
GotoTable *table = NULL;
gchar *skip_label = NULL;
}
gint
GotoTable::remove(gchar *name)
{
gint existing_pc = -1;
Label label(name);
Label *existing = (Label *)RBTree::find(&label);
if (existing) {
existing_pc = existing->pc;
RBTree::remove(existing);
delete existing;
}
return existing_pc;
}
gint
GotoTable::find(gchar *name)
{
Label label(name);
Label *existing = (Label *)RBTree::find(&label);
return existing ? existing->pc : -1;
}
gint
GotoTable::set(gchar *name, gint pc)
{
if (pc < 0)
return remove(name);
Label *label = new Label(name, pc);
Label *existing;
gint existing_pc = -1;
existing = (Label *)RBTree::find(label);
if (existing) {
existing_pc = existing->pc;
g_free(existing->name);
existing->name = label->name;
existing->pc = label->pc;
label->name = NULL;
delete label;
} else {
RBTree::insert(label);
}
#ifdef DEBUG
dump();
#endif
return existing_pc;
}
#ifdef DEBUG
void
GotoTable::dump(void)
{
for (Label *cur = (Label *)RBTree::min();
cur != NULL;
cur = (Label *)cur->next())
g_printf("table[\"%s\"] = %d\n", cur->name, cur->pc);
g_printf("---END---\n");
}
#endif
/*
* Command states
*/
StateLabel::StateLabel() : State()
{
transitions['\0'] = this;
}
State *
StateLabel::custom(gchar chr)
{
if (chr == '!') {
Goto::table->undo_set(strings[0],
Goto::table->set(strings[0], macro_pc));
if (!g_strcmp0(strings[0], Goto::skip_label)) {
g_free(undo.push_str(Goto::skip_label));
Goto::skip_label = NULL;
undo.push_var(mode) = MODE_NORMAL;
}
g_free(undo.push_str(strings[0]));
strings[0] = NULL;
return &States::start;
}
String::append(undo.push_str(strings[0]), chr);
return this;
}
/*$
* Olabel$ -- Go to label
* [n]Olabel1[,label2,...]$
*
* Go to <label>.
* The simple go-to command is a special case of the
* computed go-to command.
* A comma-separated list of labels may be specified
* in the string argument.
* The label to jump to is selected by <n> (1 is <label1>,
* 2 is <label2>, etc.).
* If <n> is omitted, the sign prefix is implied.
*
* If the label selected by <n> is does not exist in the
* list of labels, the command does nothing.
* Label definitions are cached in a table, so that
* if the label to go to has already been defined, the
* go-to command will jump immediately.
* Otherwise, parsing continues until the <label>
* is defined.
* The command will yield an error if a label has
* not been defined when the macro or command-line
* is terminated.
* In the latter case, the user will not be able to
* terminate the command-line.
*/
State *
StateGotoCmd::done(const gchar *str)
{
tecoInt value;
gchar **labels;
BEGIN_EXEC(&States::start);
value = expressions.pop_num_calc();
labels = g_strsplit(str, ",", -1);
if (value > 0 && value <= (tecoInt)g_strv_length(labels) &&
*labels[value-1]) {
gint pc = Goto::table->find(labels[value-1]);
if (pc >= 0) {
macro_pc = pc;
} else {
/* skip till label is defined */
undo.push_str(Goto::skip_label);
Goto::skip_label = g_strdup(labels[value-1]);
undo.push_var(mode) = MODE_PARSE_ONLY_GOTO;
}
}
g_strfreev(labels);
return &States::start;
}
} /* namespace SciTECO */
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