1 files changed, 76 insertions, 0 deletions

diff --git a/src/lj_buf.h b/src/lj_buf.h
new file mode 100644
index 00000000..289eb01d
--- /dev/null
+++ b/src/lj_buf.h
@@ -0,0 +1,76 @@
+/*
+** Buffer handling.
+** Copyright (C) 2005-2013 Mike Pall. See Copyright Notice in luajit.h
+*/
+
+#ifndef _LJ_BUF_H
+#define _LJ_BUF_H
+
+#include "lj_obj.h"
+#include "lj_gc.h"
+#include "lj_str.h"
+
+/* Resizable string buffers. Struct definition in lj_obj.h. */
+#define sbufB(sb)       (mref((sb)->b, char))
+#define sbufP(sb)       (mref((sb)->p, char))
+#define sbufE(sb)       (mref((sb)->e, char))
+#define sbufL(sb)       (mref((sb)->L, lua_State))
+#define sbufsz(sb)      ((MSize)(sbufE((sb)) - sbufB((sb))))
+#define sbuflen(sb)     ((MSize)(sbufP((sb)) - sbufB((sb))))
+#define setsbufP(sb, q) (setmref((sb)->p, (q)))
+#define setsbufL(sb, l) (setmref((sb)->L, (l)))
+
+LJ_FUNC char * LJ_FASTCALL lj_buf_tmp(lua_State *L, MSize sz);
+LJ_FUNC void LJ_FASTCALL lj_buf_grow(SBuf *sb, char *en);
+LJ_FUNC void LJ_FASTCALL lj_buf_shrink(lua_State *L, SBuf *sb);
+
+LJ_FUNC char *lj_buf_wmem(char *p, const void *q, MSize len);
+LJ_FUNC void lj_buf_putmem(SBuf *sb, const void *q, MSize len);
+LJ_FUNC uint32_t LJ_FASTCALL lj_buf_ruleb128(const char **pp);
+LJ_FUNC char * LJ_FASTCALL lj_buf_wuleb128(char *p, uint32_t v);
+
+static LJ_AINLINE void lj_buf_init(lua_State *L, SBuf *sb)
+{
+  setsbufL(sb, L);
+  setmref(sb->p, NULL); setmref(sb->e, NULL); setmref(sb->b, NULL);
+}
+
+static LJ_AINLINE void lj_buf_reset(SBuf *sb)
+{
+  setmrefr(sb->p, sb->b);
+}
+
+static LJ_AINLINE void lj_buf_free(global_State *g, SBuf *sb)
+{
+  lj_mem_free(g, sbufB(sb), sbufsz(sb));
+}
+
+static LJ_AINLINE GCstr *lj_buf_str(lua_State *L, SBuf *sb)
+{
+  return lj_str_new(L, sbufB(sb), sbuflen(sb));
+}
+
+static LJ_AINLINE char *lj_buf_need(SBuf *sb, MSize sz)
+{
+  char *en = sbufB(sb) + sz;
+  if (LJ_UNLIKELY(en > sbufE(sb)))
+    lj_buf_grow(sb, en);
+  return sbufB(sb);
+}
+
+static LJ_AINLINE char *lj_buf_more(SBuf *sb, MSize sz)
+{
+  char *en = sbufP(sb) + sz;
+  if (LJ_UNLIKELY(en > sbufE(sb)))
+    lj_buf_grow(sb, en);
+  return sbufP(sb);
+}
+
+static LJ_AINLINE void lj_buf_putb(SBuf *sb, int c)
+{
+  char *p = lj_buf_more(sb, 1);
+  *p++ = (char)c;
+  setsbufP(sb, p);
+}
+
+#endif