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#include <bsd/sys/tree.h>
#include <glib.h>
#include <glib/gprintf.h>
#include "sciteco.h"
#include "expressions.h"
#include "parser.h"
#include "undo.h"
#include "rbtree.h"
#include "goto.h"
namespace States {
StateLabel label;
StateGotoCmd gotocmd;
}
static gchar *skip_label = NULL;
class GotoTable : public RBTree {
class UndoTokenSet : public UndoToken {
GotoTable *table;
gchar *name;
gint pc;
public:
UndoTokenSet(GotoTable *_table, gchar *_name, gint _pc = -1)
: table(_table), name(g_strdup(_name)), pc(_pc) {}
~UndoTokenSet()
{
g_free(name);
}
void
run(void)
{
table->set(name, pc);
g_free(name);
name = NULL;
#ifdef DEBUG
table->dump();
#endif
}
};
class Label : public RBEntry {
public:
gchar *name;
gint pc;
Label(gchar *_name, gint _pc = -1)
: name(g_strdup(_name)), pc(_pc) {}
~Label()
{
g_free(name);
}
int
operator <(RBEntry &l2)
{
return g_strcmp0(name, ((Label &)l2).name);
}
};
public:
GotoTable() : RBTree() {}
gint
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
find(gchar *name)
{
Label label(name);
Label *existing = (Label *)RBTree::find(&label);
return existing ? existing->pc : -1;
}
gint
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;
}
inline void
undo_set(gchar *name, gint pc = -1)
{
undo.push(new UndoTokenSet(this, name, pc));
}
void
clear(void)
{
Label *cur;
while ((cur = (Label *)RBTree::min())) {
RBTree::remove(cur);
delete cur;
}
}
#ifdef DEBUG
void
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
};
static GotoTable table;
void
goto_table_clear(void)
{
table.clear();
}
/*
* Command states
*/
StateLabel::StateLabel() : State()
{
transitions['\0'] = this;
}
State *
StateLabel::custom(gchar chr) throw (Error)
{
gchar *new_str;
if (chr == '!') {
table.undo_set(strings[0], table.set(strings[0], macro_pc));
if (!g_strcmp0(strings[0], skip_label)) {
undo.push_str(skip_label);
g_free(skip_label);
skip_label = NULL;
undo.push_var<Mode>(mode);
mode = MODE_NORMAL;
}
undo.push_str(strings[0]);
g_free(strings[0]);
strings[0] = NULL;
return &States::start;
}
undo.push_str(strings[0]);
new_str = g_strdup_printf("%s%c", strings[0] ? : "", chr);
g_free(strings[0]);
strings[0] = new_str;
return this;
}
State *
StateGotoCmd::done(const gchar *str) throw (Error)
{
gint64 value;
gchar **labels;
BEGIN_EXEC(&States::start);
value = expressions.pop_num_calc();
labels = g_strsplit(str, ",", -1);
if (value > 0 && value <= g_strv_length(labels) && *labels[value-1]) {
gint pc = table.find(labels[value-1]);
if (pc >= 0) {
macro_pc = pc;
} else {
/* skip till label is defined */
undo.push_str(skip_label);
skip_label = g_strdup(labels[value-1]);
undo.push_var<Mode>(mode);
mode = MODE_PARSE_ONLY_GOTO;
}
}
g_strfreev(labels);
return &States::start;
}
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