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/*
** $Id: lbuffer.c,v 1.9 1999/02/26 15:48:55 roberto Exp roberto $
** Auxiliary functions for building Lua libraries
** See Copyright Notice in lua.h
*/
#include <stdio.h>
#include "lauxlib.h"
#include "lmem.h"
#include "lstate.h"
/*-------------------------------------------------------
** Auxiliary buffer
-------------------------------------------------------*/
#define EXTRABUFF 32
#define openspace(size) if (L->Mbuffnext+(size) > L->Mbuffsize) Openspace(size)
static void Openspace (int size) {
lua_State *l = L; /* to optimize */
l->Mbuffsize = (l->Mbuffnext+size+EXTRABUFF)*2;
luaM_reallocvector(l->Mbuffer, l->Mbuffsize, char);
}
char *luaL_openspace (int size) {
openspace(size);
return L->Mbuffer+L->Mbuffnext;
}
void luaL_addchar (int c) {
openspace(1);
L->Mbuffer[L->Mbuffnext++] = (char)c;
}
void luaL_resetbuffer (void) {
L->Mbuffnext = L->Mbuffbase;
}
void luaL_addsize (int n) {
L->Mbuffnext += n;
}
int luaL_getsize (void) {
return L->Mbuffnext-L->Mbuffbase;
}
int luaL_newbuffer (int size) {
int old = L->Mbuffbase;
openspace(size);
L->Mbuffbase = L->Mbuffnext;
return old;
}
void luaL_oldbuffer (int old) {
L->Mbuffnext = L->Mbuffbase;
L->Mbuffbase = old;
}
char *luaL_buffer (void) {
return L->Mbuffer+L->Mbuffbase;
}
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