1 /* $NetBSD: ldump.c,v 1.1.1.2 2012/03/15 00:08:12 alnsn Exp $ */ 2 3 /* 4 ** $Id: ldump.c,v 1.1.1.2 2012/03/15 00:08:12 alnsn Exp $ 5 ** save precompiled Lua chunks 6 ** See Copyright Notice in lua.h 7 */ 8 9 #include <stddef.h> 10 11 #define ldump_c 12 #define LUA_CORE 13 14 #include "lua.h" 15 16 #include "lobject.h" 17 #include "lstate.h" 18 #include "lundump.h" 19 20 typedef struct { 21 lua_State* L; 22 lua_Writer writer; 23 void* data; 24 int strip; 25 int status; 26 } DumpState; 27 28 #define DumpMem(b,n,size,D) DumpBlock(b,(n)*(size),D) 29 #define DumpVar(x,D) DumpMem(&x,1,sizeof(x),D) 30 31 static void DumpBlock(const void* b, size_t size, DumpState* D) 32 { 33 if (D->status==0) 34 { 35 lua_unlock(D->L); 36 D->status=(*D->writer)(D->L,b,size,D->data); 37 lua_lock(D->L); 38 } 39 } 40 41 static void DumpChar(int y, DumpState* D) 42 { 43 char x=(char)y; 44 DumpVar(x,D); 45 } 46 47 static void DumpInt(int x, DumpState* D) 48 { 49 DumpVar(x,D); 50 } 51 52 static void DumpNumber(lua_Number x, DumpState* D) 53 { 54 DumpVar(x,D); 55 } 56 57 static void DumpVector(const void* b, int n, size_t size, DumpState* D) 58 { 59 DumpInt(n,D); 60 DumpMem(b,n,size,D); 61 } 62 63 static void DumpString(const TString* s, DumpState* D) 64 { 65 if (s==NULL || getstr(s)==NULL) 66 { 67 size_t size=0; 68 DumpVar(size,D); 69 } 70 else 71 { 72 size_t size=s->tsv.len+1; /* include trailing '\0' */ 73 DumpVar(size,D); 74 DumpBlock(getstr(s),size,D); 75 } 76 } 77 78 #define DumpCode(f,D) DumpVector(f->code,f->sizecode,sizeof(Instruction),D) 79 80 static void DumpFunction(const Proto* f, const TString* p, DumpState* D); 81 82 static void DumpConstants(const Proto* f, DumpState* D) 83 { 84 int i,n=f->sizek; 85 DumpInt(n,D); 86 for (i=0; i<n; i++) 87 { 88 const TValue* o=&f->k[i]; 89 DumpChar(ttype(o),D); 90 switch (ttype(o)) 91 { 92 case LUA_TNIL: 93 break; 94 case LUA_TBOOLEAN: 95 DumpChar(bvalue(o),D); 96 break; 97 case LUA_TNUMBER: 98 DumpNumber(nvalue(o),D); 99 break; 100 case LUA_TSTRING: 101 DumpString(rawtsvalue(o),D); 102 break; 103 default: 104 lua_assert(0); /* cannot happen */ 105 break; 106 } 107 } 108 n=f->sizep; 109 DumpInt(n,D); 110 for (i=0; i<n; i++) DumpFunction(f->p[i],f->source,D); 111 } 112 113 static void DumpDebug(const Proto* f, DumpState* D) 114 { 115 int i,n; 116 n= (D->strip) ? 0 : f->sizelineinfo; 117 DumpVector(f->lineinfo,n,sizeof(int),D); 118 n= (D->strip) ? 0 : f->sizelocvars; 119 DumpInt(n,D); 120 for (i=0; i<n; i++) 121 { 122 DumpString(f->locvars[i].varname,D); 123 DumpInt(f->locvars[i].startpc,D); 124 DumpInt(f->locvars[i].endpc,D); 125 } 126 n= (D->strip) ? 0 : f->sizeupvalues; 127 DumpInt(n,D); 128 for (i=0; i<n; i++) DumpString(f->upvalues[i],D); 129 } 130 131 static void DumpFunction(const Proto* f, const TString* p, DumpState* D) 132 { 133 DumpString((f->source==p || D->strip) ? NULL : f->source,D); 134 DumpInt(f->linedefined,D); 135 DumpInt(f->lastlinedefined,D); 136 DumpChar(f->nups,D); 137 DumpChar(f->numparams,D); 138 DumpChar(f->is_vararg,D); 139 DumpChar(f->maxstacksize,D); 140 DumpCode(f,D); 141 DumpConstants(f,D); 142 DumpDebug(f,D); 143 } 144 145 static void DumpHeader(DumpState* D) 146 { 147 char h[LUAC_HEADERSIZE]; 148 luaU_header(h); 149 DumpBlock(h,LUAC_HEADERSIZE,D); 150 } 151 152 /* 153 ** dump Lua function as precompiled chunk 154 */ 155 int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip) 156 { 157 DumpState D; 158 D.L=L; 159 D.writer=w; 160 D.data=data; 161 D.strip=strip; 162 D.status=0; 163 DumpHeader(&D); 164 DumpFunction(f,NULL,&D); 165 return D.status; 166 } 167