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#ifndef SCRIPT_HPP
#define SCRIPT_HPP
# include <cstdint>
# include <cstring> // for inlined get_str - TODO remove
# include <vector>
# include "../strings/fstring.hpp"
# include "../strings/zstring.hpp"
# include "../common/db.hpp"
# include "../common/dumb_ptr.hpp"
# include "../common/utils.hpp"
# include "map.t.hpp"
enum class ByteCode : uint8_t;
struct str_data_t;
class ScriptBuffer
{
typedef ZString::iterator ZSit;
std::vector<ByteCode> script_buf;
public:
// construction methods used only by script.cpp
void add_scriptc(ByteCode a);
void add_scriptb(uint8_t a);
void add_scripti(uint32_t a);
void add_scriptl(str_data_t *a);
void set_label(str_data_t *ld, int pos_);
ZSit parse_simpleexpr(ZSit p);
ZSit parse_subexpr(ZSit p, int limit);
ZSit parse_expr(ZSit p);
ZSit parse_line(ZSit p);
void parse_script(ZString src, int line);
// consumption methods used only by script.cpp
ByteCode operator[](size_t i) const { return script_buf[i]; }
ZString get_str(size_t i) const
{
return ZString(strings::really_construct_from_a_pointer, reinterpret_cast<const char *>(&script_buf[i]), nullptr);
}
// method used elsewhere
};
struct ScriptPointer
{
const ScriptBuffer *code;
size_t pos;
ScriptPointer()
: code()
, pos()
{}
ScriptPointer(const ScriptBuffer *c, size_t p)
: code(c)
, pos(p)
{}
ByteCode peek() const { return (*code)[pos]; }
ByteCode pop() { return (*code)[pos++]; }
ZString pops()
{
ZString rv = code->get_str(pos);
pos += rv.size();
++pos;
return rv;
}
};
// internal
class SIR
{
uint32_t impl;
SIR(SP v)
: impl(static_cast<uint32_t>(v))
{}
SIR(unsigned v, uint8_t i)
: impl((i << 24) | v)
{}
public:
SIR() : impl() {}
unsigned base() const { return impl & 0x00ffffff; }
uint8_t index() const { return impl >> 24; }
SIR iplus(uint8_t i) const { return SIR(base(), index() + i); }
static SIR from(unsigned v, uint8_t i=0) { return SIR(v, i); }
SP sp() const { return static_cast<SP>(impl); }
static SIR from(SP v) { return SIR(v); }
friend bool operator == (SIR l, SIR r) { return l.impl == r.impl; }
friend bool operator < (SIR l, SIR r) { return l.impl < r.impl; }
};
struct script_data
{
ByteCode type;
union uu
{
SIR reg;
int numi;
dumb_string str;
// Not a ScriptPointer - pos is stored in a separate slot,
// to avoid exploding the struct for everyone.
const ScriptBuffer *script;
uu() { memset(this, '\0', sizeof(*this)); }
~uu() = default;
uu(const uu&) = default;
uu& operator = (const uu&) = default;
} u;
};
struct script_stack
{
std::vector<struct script_data> stack_datav;
};
enum class ScriptEndState;
// future improvements coming!
class ScriptState
{
public:
struct script_stack *stack;
int start, end;
ScriptEndState state;
int rid, oid;
ScriptPointer scriptp, new_scriptp;
int defsp, new_defsp;
};
std::unique_ptr<const ScriptBuffer> parse_script(ZString, int);
struct argrec_t
{
ZString name;
union _aru
{
int i;
ZString s;
_aru(int n) : i(n) {}
_aru(ZString z) : s(z) {}
} v;
argrec_t(ZString n, int i) : name(n), v(i) {}
argrec_t(ZString n, ZString z) : name(n), v(z) {}
};
int run_script_l(ScriptPointer, int, int, int, argrec_t *args);
int run_script(ScriptPointer, int, int);
struct ScriptLabel;
extern
Map<ScriptLabel, int> scriptlabel_db;
extern
UPMap<FString, const ScriptBuffer> userfunc_db;
void do_init_script(void);
void do_final_script(void);
extern FString mapreg_txt;
extern int script_errors;
#endif // SCRIPT_HPP
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