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1/*
2** $Id: ldump.c,v 2.17 2012/01/23 23:02:10 roberto Exp $
3** save precompiled Lua chunks
4** See Copyright Notice in lua.h
5*/
6
7#include <stddef.h>
8
9#define ldump_c
10#define LUA_CORE
11
12#include "lua.h"
13
14#include "lobject.h"
15#include "lstate.h"
16#include "lundump.h"
17
18typedef struct {
19 lua_State* L;
20 lua_Writer writer;
21 void* data;
22 int strip;
23 int status;
24} DumpState;
25
26#define DumpMem(b,n,size,D) DumpBlock(b,(n)*(size),D)
27#define DumpVar(x,D) DumpMem(&x,1,sizeof(x),D)
28
29static void DumpBlock(const void* b, size_t size, DumpState* D)
30{
31 if (D->status==0)
32 {
33 lua_unlock(D->L);
34 D->status=(*D->writer)(D->L,b,size,D->data);
35 lua_lock(D->L);
36 }
37}
38
39static void DumpChar(int y, DumpState* D)
40{
41 char x=(char)y;
42 DumpVar(x,D);
43}
44
45static void DumpInt(int x, DumpState* D)
46{
47 DumpVar(x,D);
48}
49
50static void DumpNumber(lua_Number x, DumpState* D)
51{
52 DumpVar(x,D);
53}
54
55static void DumpVector(const void* b, int n, size_t size, DumpState* D)
56{
57 DumpInt(n,D);
58 DumpMem(b,n,size,D);
59}
60
61static void DumpString(const TString* s, DumpState* D)
62{
63 if (s==NULL)
64 {
65 size_t size=0;
66 DumpVar(size,D);
67 }
68 else
69 {
70 size_t size=s->tsv.len+1; /* include trailing '\0' */
71 DumpVar(size,D);
72 DumpBlock(getstr(s),size*sizeof(char),D);
73 }
74}
75
76#define DumpCode(f,D) DumpVector(f->code,f->sizecode,sizeof(Instruction),D)
77
78static void DumpFunction(const Proto* f, DumpState* D);
79
80static void DumpConstants(const Proto* f, DumpState* D)
81{
82 int i,n=f->sizek;
83 DumpInt(n,D);
84 for (i=0; i<n; i++)
85 {
86 const TValue* o=&f->k[i];
87 DumpChar(ttypenv(o),D);
88 switch (ttypenv(o))
89 {
90 case LUA_TNIL:
91 break;
92 case LUA_TBOOLEAN:
93 DumpChar(bvalue(o),D);
94 break;
95 case LUA_TNUMBER:
96 DumpNumber(nvalue(o),D);
97 break;
98 case LUA_TSTRING:
99 DumpString(rawtsvalue(o),D);
100 break;
101 default: lua_assert(0);
102 }
103 }
104 n=f->sizep;
105 DumpInt(n,D);
106 for (i=0; i<n; i++) DumpFunction(f->p[i],D);
107}
108
109static void DumpUpvalues(const Proto* f, DumpState* D)
110{
111 int i,n=f->sizeupvalues;
112 DumpInt(n,D);
113 for (i=0; i<n; i++)
114 {
115 DumpChar(f->upvalues[i].instack,D);
116 DumpChar(f->upvalues[i].idx,D);
117 }
118}
119
120static void DumpDebug(const Proto* f, DumpState* D)
121{
122 int i,n;
123 DumpString((D->strip) ? NULL : f->source,D);
124 n= (D->strip) ? 0 : f->sizelineinfo;
125 DumpVector(f->lineinfo,n,sizeof(int),D);
126 n= (D->strip) ? 0 : f->sizelocvars;
127 DumpInt(n,D);
128 for (i=0; i<n; i++)
129 {
130 DumpString(f->locvars[i].varname,D);
131 DumpInt(f->locvars[i].startpc,D);
132 DumpInt(f->locvars[i].endpc,D);
133 }
134 n= (D->strip) ? 0 : f->sizeupvalues;
135 DumpInt(n,D);
136 for (i=0; i<n; i++) DumpString(f->upvalues[i].name,D);
137}
138
139static void DumpFunction(const Proto* f, DumpState* D)
140{
141 DumpInt(f->linedefined,D);
142 DumpInt(f->lastlinedefined,D);
143 DumpChar(f->numparams,D);
144 DumpChar(f->is_vararg,D);
145 DumpChar(f->maxstacksize,D);
146 DumpCode(f,D);
147 DumpConstants(f,D);
148 DumpUpvalues(f,D);
149 DumpDebug(f,D);
150}
151
152static void DumpHeader(DumpState* D)
153{
154 lu_byte h[LUAC_HEADERSIZE];
155 luaU_header(h);
156 DumpBlock(h,LUAC_HEADERSIZE,D);
157}
158
159/*
160** dump Lua function as precompiled chunk
161*/
162int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip)
163{
164 DumpState D;
165 D.L=L;
166 D.writer=w;
167 D.data=data;
168 D.strip=strip;
169 D.status=0;
170 DumpHeader(&D);
171 DumpFunction(f,&D);
172 return D.status;
173}
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