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Refactor string buffer growth helpers.

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This commit is contained in:
Mike Pall
2013-05-29 20:17:26 +02:00
parent b6882a57da
commit c5ebfa0c67
3 changed files with 31 additions and 21 deletions
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36
src/lj_buf.c
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@@ -3,8 +3,6 @@
** Copyright (C) 2005-2013 Mike Pall. See Copyright Notice in luajit.h
*/
#include <stdio.h>
#define lj_buf_c
#define LUA_CORE
@@ -18,23 +16,37 @@
/* -- Buffer management --------------------------------------------------- */
LJ_NOINLINE void LJ_FASTCALL lj_buf_grow(SBuf *sb, char *en)
static void buf_grow(SBuf *sb, MSize sz)
{
lua_State *L = sbufL(sb);
char *b = sbufB(sb);
MSize sz = (MSize)(en - b);
MSize osz = (MSize)(sbufE(sb) - b), nsz = osz;
MSize n = (MSize)(sbufP(sb) - b);
if (LJ_UNLIKELY(sz > LJ_MAX_MEM))
lj_err_mem(L);
MSize osz = sbufsz(sb), len = sbuflen(sb), nsz = osz;
char *b;
if (nsz < LJ_MIN_SBUF) nsz = LJ_MIN_SBUF;
while (nsz < sz) nsz += nsz;
b = (char *)lj_mem_realloc(L, b, osz, nsz);
b = (char *)lj_mem_realloc(sbufL(sb), sbufB(sb), osz, nsz);
setmref(sb->b, b);
setmref(sb->p, b + n);
setmref(sb->p, b + len);
setmref(sb->e, b + nsz);
}
LJ_NOINLINE char *LJ_FASTCALL lj_buf_need2(SBuf *sb, MSize sz)
{
lua_assert(sz > sbufsz(sb));
if (LJ_UNLIKELY(sz > LJ_MAX_MEM))
lj_err_mem(sbufL(sb));
buf_grow(sb, sz);
return sbufB(sb);
}
LJ_NOINLINE char *LJ_FASTCALL lj_buf_more2(SBuf *sb, MSize sz)
{
MSize len = sbuflen(sb);
lua_assert(sz > sbufleft(sb));
if (LJ_UNLIKELY(sz > LJ_MAX_MEM || len + sz > LJ_MAX_MEM))
lj_err_mem(sbufL(sb));
buf_grow(sb, len + sz);
return sbufP(sb);
}
void LJ_FASTCALL lj_buf_shrink(lua_State *L, SBuf *sb)
{
char *b = sbufB(sb);