| /* |
| ** $Id: lbuffer.c,v 1.8 1999/02/25 19:20:40 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 */ |
| size += EXTRABUFF; |
| l->Mbuffsize = l->Mbuffnext+size; |
| luaM_growvector(l->Mbuffer, l->Mbuffnext, size, char, arrEM, MAX_INT); |
| } |
| |
| |
| 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; |
| } |
| |