| 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 | |
| 18 | typedef 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 | |
| 29 | static 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 | |
| 39 | static void DumpChar(int y, DumpState* D) |
| 40 | { |
| 41 | char x=(char)y; |
| 42 | DumpVar(x,D); |
| 43 | } |
| 44 | |
| 45 | static void DumpInt(int x, DumpState* D) |
| 46 | { |
| 47 | DumpVar(x,D); |
| 48 | } |
| 49 | |
| 50 | static void DumpNumber(lua_Number x, DumpState* D) |
| 51 | { |
| 52 | DumpVar(x,D); |
| 53 | } |
| 54 | |
| 55 | static 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 | |
| 61 | static 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 | |
| 78 | static void DumpFunction(const Proto* f, DumpState* D); |
| 79 | |
| 80 | static 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 | |
| 109 | static 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 | |
| 120 | static 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 | |
| 139 | static 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 | |
| 152 | static 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 | */ |
| 162 | int 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 | } |