mirror of https://github.com/odrling/Aegisub
104 lines
2.9 KiB
C
104 lines
2.9 KiB
C
/*
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** Buffer handling.
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** Copyright (C) 2005-2017 Mike Pall. See Copyright Notice in luajit.h
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*/
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#ifndef _LJ_BUF_H
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#define _LJ_BUF_H
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#include "lj_obj.h"
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#include "lj_gc.h"
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#include "lj_str.h"
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/* Resizable string buffers. Struct definition in lj_obj.h. */
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#define sbufB(sb) (mref((sb)->b, char))
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#define sbufP(sb) (mref((sb)->p, char))
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#define sbufE(sb) (mref((sb)->e, char))
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#define sbufL(sb) (mref((sb)->L, lua_State))
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#define sbufsz(sb) ((MSize)(sbufE((sb)) - sbufB((sb))))
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#define sbuflen(sb) ((MSize)(sbufP((sb)) - sbufB((sb))))
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#define sbufleft(sb) ((MSize)(sbufE((sb)) - sbufP((sb))))
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#define setsbufP(sb, q) (setmref((sb)->p, (q)))
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#define setsbufL(sb, l) (setmref((sb)->L, (l)))
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/* Buffer management */
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LJ_FUNC char *LJ_FASTCALL lj_buf_need2(SBuf *sb, MSize sz);
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LJ_FUNC char *LJ_FASTCALL lj_buf_more2(SBuf *sb, MSize sz);
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LJ_FUNC void LJ_FASTCALL lj_buf_shrink(lua_State *L, SBuf *sb);
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LJ_FUNC char * LJ_FASTCALL lj_buf_tmp(lua_State *L, MSize sz);
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static LJ_AINLINE void lj_buf_init(lua_State *L, SBuf *sb)
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{
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setsbufL(sb, L);
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setmref(sb->p, NULL); setmref(sb->e, NULL); setmref(sb->b, NULL);
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}
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static LJ_AINLINE void lj_buf_reset(SBuf *sb)
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{
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setmrefr(sb->p, sb->b);
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}
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static LJ_AINLINE SBuf *lj_buf_tmp_(lua_State *L)
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{
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SBuf *sb = &G(L)->tmpbuf;
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setsbufL(sb, L);
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lj_buf_reset(sb);
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return sb;
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}
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static LJ_AINLINE void lj_buf_free(global_State *g, SBuf *sb)
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{
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lj_mem_free(g, sbufB(sb), sbufsz(sb));
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}
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static LJ_AINLINE char *lj_buf_need(SBuf *sb, MSize sz)
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{
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if (LJ_UNLIKELY(sz > sbufsz(sb)))
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return lj_buf_need2(sb, sz);
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return sbufB(sb);
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}
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static LJ_AINLINE char *lj_buf_more(SBuf *sb, MSize sz)
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{
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if (LJ_UNLIKELY(sz > sbufleft(sb)))
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return lj_buf_more2(sb, sz);
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return sbufP(sb);
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}
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/* Low-level buffer put operations */
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LJ_FUNC SBuf *lj_buf_putmem(SBuf *sb, const void *q, MSize len);
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LJ_FUNC SBuf * LJ_FASTCALL lj_buf_putchar(SBuf *sb, int c);
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LJ_FUNC SBuf * LJ_FASTCALL lj_buf_putstr(SBuf *sb, GCstr *s);
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static LJ_AINLINE char *lj_buf_wmem(char *p, const void *q, MSize len)
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{
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return (char *)memcpy(p, q, len) + len;
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}
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static LJ_AINLINE void lj_buf_putb(SBuf *sb, int c)
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{
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char *p = lj_buf_more(sb, 1);
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*p++ = (char)c;
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setsbufP(sb, p);
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}
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/* High-level buffer put operations */
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LJ_FUNCA SBuf * LJ_FASTCALL lj_buf_putstr_reverse(SBuf *sb, GCstr *s);
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LJ_FUNCA SBuf * LJ_FASTCALL lj_buf_putstr_lower(SBuf *sb, GCstr *s);
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LJ_FUNCA SBuf * LJ_FASTCALL lj_buf_putstr_upper(SBuf *sb, GCstr *s);
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LJ_FUNC SBuf *lj_buf_putstr_rep(SBuf *sb, GCstr *s, int32_t rep);
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LJ_FUNC SBuf *lj_buf_puttab(SBuf *sb, GCtab *t, GCstr *sep,
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int32_t i, int32_t e);
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/* Miscellaneous buffer operations */
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LJ_FUNCA GCstr * LJ_FASTCALL lj_buf_tostr(SBuf *sb);
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LJ_FUNC GCstr *lj_buf_cat2str(lua_State *L, GCstr *s1, GCstr *s2);
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LJ_FUNC uint32_t LJ_FASTCALL lj_buf_ruleb128(const char **pp);
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static LJ_AINLINE GCstr *lj_buf_str(lua_State *L, SBuf *sb)
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{
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return lj_str_new(L, sbufB(sb), sbuflen(sb));
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}
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#endif
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