A modern Music Player Daemon based on Rockbox open source high quality audio player
tsiry-sandratraina.com
libadwaita
audio
rust
zig
deno
mpris
rockbox
mpd
1/*
2** $Id: lundump.c,v 2.7.1.4 2008/04/04 19:51:41 roberto Exp $
3** load precompiled Lua chunks
4** See Copyright Notice in lua.h
5*/
6
7#include <string.h>
8
9#define lundump_c
10#define LUA_CORE
11
12#include "lua.h"
13
14#include "ldebug.h"
15#include "ldo.h"
16#include "lfunc.h"
17#include "lmem.h"
18#include "lobject.h"
19#include "lstring.h"
20#include "lundump.h"
21#include "lzio.h"
22
23#ifndef LUA_DISABLE_BYTECODE
24
25typedef struct {
26 lua_State* L;
27 ZIO* Z;
28 Mbuffer* b;
29 const char* name;
30} LoadState;
31
32#ifdef LUAC_TRUST_BINARIES
33#define IF(c,s) if (c) error(S,s)
34#define error(S,s) {(void) S; (void) s;}
35#else
36#define IF(c,s) if (c) error(S,s)
37
38static void error(LoadState* S, const char* why)
39{
40 luaO_pushfstring(S->L,"%s: %s in precompiled chunk",S->name,why);
41 luaD_throw(S->L,LUA_ERRSYNTAX);
42}
43#endif
44
45#define LoadMem(S,b,n,size) LoadBlock(S,b,(n)*(size))
46#define LoadByte(S) (lu_byte)LoadChar(S)
47#define LoadVar(S,x) LoadMem(S,&x,1,sizeof(x))
48#define LoadVector(S,b,n,size) LoadMem(S,b,n,size)
49
50static void LoadBlock(LoadState* S, void* b, size_t size)
51{
52 size_t r=luaZ_read(S->Z,b,size);
53 IF (r!=0, "unexpected end");
54}
55
56static int LoadChar(LoadState* S)
57{
58 char x;
59 LoadVar(S,x);
60 return x;
61}
62
63static int LoadInt(LoadState* S)
64{
65 int x;
66 LoadVar(S,x);
67 IF (x<0, "bad integer");
68 return x;
69}
70
71static lua_Number LoadNumber(LoadState* S)
72{
73 lua_Number x;
74 LoadVar(S,x);
75 return x;
76}
77
78static TString* LoadString(LoadState* S)
79{
80 size_t size;
81 LoadVar(S,size);
82 if (size==0)
83 return NULL;
84 else
85 {
86 char* s=luaZ_openspace(S->L,S->b,size);
87 LoadBlock(S,s,size);
88 return luaS_newlstr(S->L,s,size-1); /* remove trailing '\0' */
89 }
90}
91
92static void LoadCode(LoadState* S, Proto* f)
93{
94 int n=LoadInt(S);
95 f->code=luaM_newvector(S->L,n,Instruction);
96 f->sizecode=n;
97 LoadVector(S,f->code,n,sizeof(Instruction));
98}
99
100static Proto* LoadFunction(LoadState* S, TString* p);
101
102static void LoadConstants(LoadState* S, Proto* f)
103{
104 int i,n;
105 n=LoadInt(S);
106 f->k=luaM_newvector(S->L,n,TValue);
107 f->sizek=n;
108 for (i=0; i<n; i++) setnilvalue(&f->k[i]);
109 for (i=0; i<n; i++)
110 {
111 TValue* o=&f->k[i];
112 int t=LoadChar(S);
113 switch (t)
114 {
115 case LUA_TNIL:
116 setnilvalue(o);
117 break;
118 case LUA_TBOOLEAN:
119 setbvalue(o,LoadChar(S)!=0);
120 break;
121 case LUA_TNUMBER:
122 setnvalue(o,LoadNumber(S));
123 break;
124 case LUA_TSTRING:
125 setsvalue2n(S->L,o,LoadString(S));
126 break;
127 default:
128 error(S,"bad constant");
129 break;
130 }
131 }
132 n=LoadInt(S);
133 f->p=luaM_newvector(S->L,n,Proto*);
134 f->sizep=n;
135 for (i=0; i<n; i++) f->p[i]=NULL;
136 for (i=0; i<n; i++) f->p[i]=LoadFunction(S,f->source);
137}
138
139static void LoadDebug(LoadState* S, Proto* f)
140{
141 int i,n;
142 n=LoadInt(S);
143#ifdef LUA_OPTIMIZE_DEBUG
144 if(n) {
145 f->packedlineinfo=luaM_newvector(S->L,n,unsigned char);
146 LoadBlock(S,f->packedlineinfo,n);
147 } else {
148 f->packedlineinfo=NULL;
149 }
150#else
151 f->lineinfo=luaM_newvector(S->L,n,int);
152 f->sizelineinfo=n;
153 LoadVector(S,f->lineinfo,n,sizeof(int));
154#endif
155 n=LoadInt(S);
156 f->locvars=luaM_newvector(S->L,n,LocVar);
157 f->sizelocvars=n;
158 for (i=0; i<n; i++) f->locvars[i].varname=NULL;
159 for (i=0; i<n; i++)
160 {
161 f->locvars[i].varname=LoadString(S);
162 f->locvars[i].startpc=LoadInt(S);
163 f->locvars[i].endpc=LoadInt(S);
164 }
165 n=LoadInt(S);
166 f->upvalues=luaM_newvector(S->L,n,TString*);
167 f->sizeupvalues=n;
168 for (i=0; i<n; i++) f->upvalues[i]=NULL;
169 for (i=0; i<n; i++) f->upvalues[i]=LoadString(S);
170}
171
172static Proto* LoadFunction(LoadState* S, TString* p)
173{
174 Proto* f;
175 if (++S->L->nCcalls > LUAI_MAXCCALLS) error(S,"code too deep");
176 f=luaF_newproto(S->L);
177 setptvalue2s(S->L,S->L->top,f); incr_top(S->L);
178 f->source=LoadString(S); if (f->source==NULL) f->source=p;
179 f->linedefined=LoadInt(S);
180 f->lastlinedefined=LoadInt(S);
181 f->nups=LoadByte(S);
182 f->numparams=LoadByte(S);
183 f->is_vararg=LoadByte(S);
184 f->maxstacksize=LoadByte(S);
185 LoadCode(S,f);
186 LoadConstants(S,f);
187 LoadDebug(S,f);
188 IF (!luaG_checkcode(f), "bad code");
189 S->L->top--;
190 S->L->nCcalls--;
191 return f;
192}
193
194static void LoadHeader(LoadState* S)
195{
196 char h[LUAC_HEADERSIZE];
197 char s[LUAC_HEADERSIZE];
198 luaU_header(h);
199 LoadBlock(S,s,LUAC_HEADERSIZE);
200 IF (memcmp(h,s,LUAC_HEADERSIZE)!=0, "bad header");
201}
202
203/*
204** load precompiled chunk
205*/
206Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name)
207{
208 LoadState S;
209 if (*name=='@' || *name=='=')
210 S.name=name+1;
211 else if (*name==LUA_SIGNATURE[0])
212 S.name="binary string";
213 else
214 S.name=name;
215 S.L=L;
216 S.Z=Z;
217 S.b=buff;
218 LoadHeader(&S);
219 return LoadFunction(&S,luaS_newliteral(L,"=?"));
220}
221
222/*
223* make header
224*/
225void luaU_header (char* h)
226{
227 int x=1;
228 memcpy(h,LUA_SIGNATURE,sizeof(LUA_SIGNATURE)-1);
229 h+=sizeof(LUA_SIGNATURE)-1;
230 *h++=(char)LUAC_VERSION;
231 *h++=(char)LUAC_FORMAT;
232 *h++=(char)*(char*)&x; /* endianness */
233 *h++=(char)sizeof(int);
234 *h++=(char)sizeof(size_t);
235 *h++=(char)sizeof(Instruction);
236 *h++=(char)sizeof(lua_Number);
237 *h++=(char)(((lua_Number)0.5)==0); /* is lua_Number integral? */
238}
239
240#else /* LUA_DISABLE_BYTECODE */
241#include "lauxlib.h"
242Proto* luaU_undump (lua_State* L, ZIO* Z, Mbuffer* buff, const char* name)
243{
244 (void) Z;
245 (void) buff;
246 luaL_error(L, LUA_QL("%s") " bytecode not supported", name);
247 return NULL;
248}
249#endif