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/*
** $Id: lbuffer.c,v 1.10 1999/11/10 15:40:46 roberto Exp roberto $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
#include <stdio.h>
#define LUA_REENTRANT
#include "lauxlib.h"
#include "lmem.h"
#include "lstate.h"
/*-------------------------------------------------------
** Auxiliary buffer
-------------------------------------------------------*/
#define EXTRABUFF 32
#define openspace(L, size) if (L->Mbuffnext+(size) > L->Mbuffsize) Openspace(L, size)
static void Openspace (lua_State *L, int size) {
L->Mbuffsize = (L->Mbuffnext+size+EXTRABUFF)*2;
luaM_reallocvector(L, L->Mbuffer, L->Mbuffsize, char);
}
char *luaL_openspace (lua_State *L, int size) {
openspace(L, size);
return L->Mbuffer+L->Mbuffnext;
}
void luaL_addchar (lua_State *L, int c) {
openspace(L, 1);
L->Mbuffer[L->Mbuffnext++] = (char)c;
}
void luaL_resetbuffer (lua_State *L) {
L->Mbuffnext = L->Mbuffbase;
}
void luaL_addsize (lua_State *L, int n) {
L->Mbuffnext += n;
}
int luaL_getsize (lua_State *L) {
return L->Mbuffnext-L->Mbuffbase;
}
int luaL_newbuffer (lua_State *L, int size) {
int old = L->Mbuffbase;
openspace(L, size);
L->Mbuffbase = L->Mbuffnext;
return old;
}
void luaL_oldbuffer (lua_State *L, int old) {
L->Mbuffnext = L->Mbuffbase;
L->Mbuffbase = old;
}
char *luaL_buffer (lua_State *L) {
return L->Mbuffer+L->Mbuffbase;
}
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