/*
** String handling.
** Copyright (C) 2005-2010 Mike Pall. See Copyright Notice in luajit.h
*/

#ifndef _LJ_STR_H
#define _LJ_STR_H

#include <stdarg.h>

#include "lj_obj.h"

/* String interning. */
LJ_FUNC int32_t LJ_FASTCALL lj_str_cmp(GCstr *a, GCstr *b);
LJ_FUNC void lj_str_resize(lua_State *L, MSize newmask);
LJ_FUNCA GCstr *lj_str_new(lua_State *L, const char *str, size_t len);
LJ_FUNC void LJ_FASTCALL lj_str_free(global_State *g, GCstr *s);

#define lj_str_newz(L, s)	(lj_str_new(L, s, strlen(s)))
#define lj_str_newlit(L, s)	(lj_str_new(L, "" s, sizeof(s)-1))

/* Type conversions. */
LJ_FUNC int LJ_FASTCALL lj_str_numconv(const char *s, TValue *n);
LJ_FUNC int LJ_FASTCALL lj_str_tonum(GCstr *str, TValue *n);
LJ_FUNCA GCstr * LJ_FASTCALL lj_str_fromnum(lua_State *L, const lua_Number *np);
LJ_FUNC GCstr * LJ_FASTCALL lj_str_fromint(lua_State *L, int32_t k);

/* String formatting. */
LJ_FUNC const char *lj_str_pushvf(lua_State *L, const char *fmt, va_list argp);
LJ_FUNC const char *lj_str_pushf(lua_State *L, const char *fmt, ...)
#if defined(__GNUC__)
  __attribute__ ((format (printf, 2, 3)))
#endif
  ;

/* Resizable string buffers. Struct definition in lj_obj.h. */
LJ_FUNC char *lj_str_needbuf(lua_State *L, SBuf *sb, MSize sz);

#define lj_str_initbuf(L, sb)	((sb)->buf = NULL, (sb)->sz = 0)
#define lj_str_resetbuf(sb)	((sb)->n = 0)
#define lj_str_resizebuf(L, sb, size) \
  ((sb)->buf = (char *)lj_mem_realloc(L, (sb)->buf, (sb)->sz, (size)), \
   (sb)->sz = (size))
#define lj_str_freebuf(g, sb)	lj_mem_free(g, (void *)(sb)->buf, (sb)->sz)

#endif