lua-msgpack/encode.c at master · CandyMi/lua-msgpack · GitHub

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#include"msgpack.h"

intmsgpack_enc_map(lua_State*L, xrio_Buffer*B);
intmsgpack_enc_array(lua_State*L, xrio_Buffer*B);

/* 编码`Nil` */
voidmsgpack_enc_nil(xrio_Buffer*B) {
xrio_addchar(B, MSG_TYPE_NIL);
}

/* 编码`Boolean` */
voidmsgpack_enc_boolean(xrio_Buffer*B, boolop) {
xrio_addchar(B, op== true ? MSG_TYPE_TRUE : MSG_TYPE_FALSE);
}

/* 编码`Number` */
voidmsgpack_enc_number(xrio_Buffer*B, lua_Numbern) {
floatf= (float)n;
// printf("%.8f, %.8f, %s\n", f, n, (double)f == n ? "true" : "false");
if ((double)f==n||sizeof(lua_Number) ==sizeof(f))
 {
xrio_hton32((uint32_t*)&f);
xrio_addchar(B, MSG_TYPE_FLOAT32);
xrio_addlstring(B, (char*)&f, 4);
 }
else
 {
xrio_hton64((uint64_t*)&n);
xrio_addchar(B, MSG_TYPE_FLOAT64);
xrio_addlstring(B, (char*)&n, 8);
 }
}

/* 编码`Integer` */
voidmsgpack_enc_integer(xrio_Buffer*B, lua_Integeri) {
if (i >= 0)
 {
if (i <= INT8_MAX) {
xrio_addchar(B, (uint8_t)i);
return;
 }
if (i <= UINT8_MAX) {
xrio_addchar(B, MSG_TYPE_UINT8);
xrio_addchar(B, (uint8_t)i);
return;
 }
if (i <= UINT16_MAX) {
uint16_tdata=i;
xrio_hton16((uint16_t*)&data);
xrio_addchar(B, MSG_TYPE_UINT16);
xrio_addlstring(B, (char*)&data, 2);
return;
 }
if (i <= UINT32_MAX) {
uint32_tdata=i;
xrio_hton32((uint32_t*)&data);
xrio_addchar(B, MSG_TYPE_UINT32);
xrio_addlstring(B, (char*)&data, 4);
return;
 }
 }
else
 {
if (i >= -32) {
xrio_addchar(B, (uint8_t)i);
return;
 }
if (i >= INT8_MIN) {
xrio_addchar(B, MSG_TYPE_INT8);
xrio_addchar(B, (int8_t)i);
return;
 }
if (i >= INT16_MIN) {
uint16_tdata=i;
xrio_hton16((uint16_t*)&data);
xrio_addchar(B, MSG_TYPE_INT16);
xrio_addlstring(B, (char*)&data, 2);
return;
 }
if (i >= INT32_MIN) {
uint32_tdata=i;
xrio_hton32((uint32_t*)&data);
xrio_addchar(B, MSG_TYPE_INT32);
xrio_addlstring(B, (char*)&data, 4);
return;
 }
 }
uint64_tdata=i;
xrio_hton64((uint64_t*)&data);
xrio_addchar(B, MSG_TYPE_INT64);
xrio_addlstring(B, (char*)&data, 8);
return;
}

intmsgpack_enc_string(lua_State*L, xrio_Buffer*B, constchar*buffer, size_tbsize) {
if (bsize <= 31) {
xrio_addchar(B, 0xa0+bsize); /* fixstr start position + 数量 */
xrio_addlstring(B, buffer, bsize);
returnbsize+1;
 }
if (bsize <= UINT8_MAX) {
xrio_addchar(B, MSG_TYPE_STR8);
xrio_addchar(B, (uint8_t)bsize);
xrio_addlstring(B, buffer, bsize);
returnbsize+2;
 }
if (bsize <= UINT16_MAX) {
xrio_addchar(B, MSG_TYPE_STR16);
returnbsize+3;
 }
if (bsize <= UINT32_MAX) {
xrio_addchar(B, MSG_TYPE_STR32);
returnbsize+5;
 }
returnluaL_error(L, "[msgpack encode]: string was too long(%zu).", bsize);
}

/* 编码`Array` */
intmsgpack_enc_array(lua_State*L, xrio_Buffer*root) {
intkt; intvt; size_tcount=0;
xrio_BufferB; xrio_buffinit(L, &B);
lua_pushnil(L);
while (lua_next(L, -2))
 {
kt=lua_type(L, -2);
if (kt!=LUA_TNUMBER||lua_tointeger(L, -2) -count!=1) {
lua_pop(L, 2); B.L=NULL; xrio_pushresult(&B);
return-1; /* 并非纯数组 */
 }

/* 获取`Value`字段类型 */
vt=lua_type(L, -1);
switch (vt)
 {
caseLUA_TBOOLEAN:
msgpack_enc_boolean(&B, lua_toboolean(L, -1));
break;
caseLUA_TLIGHTUSERDATA:
msgpack_enc_nil(&B);
break;
caseLUA_TSTRING:
 {
size_tbsize; constchar*buffer=luaL_checklstring(L, -1, &bsize);
msgpack_enc_string(L, &B, buffer, bsize);
 }
break;
caseLUA_TNUMBER:
if (lua_isinteger(L, -1))
msgpack_enc_integer(&B, lua_tointeger(L, -1));
else
msgpack_enc_number(&B, lua_tonumber(L, -1));
break;
caseLUA_TTABLE:
msgpack_enc_map(L, &B);
break;
default:
B.L=NULL; xrio_pushresult(&B);
returnluaL_error(L, "[msgpack encode]: Unsupported array value type `%s`.", lua_typename(L, vt));
 }
lua_pop(L, 1);
count++;
 }

if (count <= 15)
xrio_addchar(root, 0x90+count);
elseif(count <= UINT16_MAX)
xrio_addchar(root, MSG_TYPE_ARR16);
elseif(count <= UINT32_MAX)
xrio_addchar(root, MSG_TYPE_ARR32);
else {
B.L=NULL; xrio_pushresult(&B);
returnluaL_error(L, "[msgpack encode]: Invalid array items `%zu`.", count);
 }

if (count&&B.bidx)
xrio_addlstring(root, B.b, B.bidx);

B.L=NULL; xrio_pushresult(&B);
return0;
}

/* 编码`Map` */
intmsgpack_enc_map(lua_State*L, xrio_Buffer*root) {
intkt; intvt; size_tcount=0;
if (lua_rawlen(L, -1) >0) {
if (!msgpack_enc_array(L, root))
return0;
 } elseif (lua_getmetatable(L, -1) ==1&&luaL_getmetatable(L, "lua_List")) {
intis_list=lua_rawequal(L, -1, -2); lua_pop(L, 2);
if (is_list&& !msgpack_enc_array(L, root))
return0;
 }
lua_pushnil(L);
xrio_BufferB; xrio_buffinit(L, &B);
while (lua_next(L, -2))
 {
/* 获取`Key`字段类型 */
kt=lua_type(L, -2);
switch (kt)
 {
caseLUA_TSTRING:
 {
size_tbsize; constchar*buffer=luaL_checklstring(L, -2, &bsize);
msgpack_enc_string(L, &B, buffer, bsize);
 }
break;
caseLUA_TNUMBER:
if (lua_isinteger(L, -2))
msgpack_enc_integer(&B, lua_tointeger(L, -2));
else
msgpack_enc_number(&B, lua_tonumber(L, -2));
break;
default:
B.L=NULL; xrio_pushresult(&B);
returnluaL_error(L, "[msgpack encode]: Invalid map key type `%s`.", lua_typename(L, kt));
 }
/* 获取`Value`字段类型 */
vt=lua_type(L, -1);
switch (vt)
 {
caseLUA_TBOOLEAN:
msgpack_enc_boolean(&B, lua_toboolean(L, -1));
break;
caseLUA_TLIGHTUSERDATA:
msgpack_enc_nil(&B);
break;
caseLUA_TSTRING:
 {
size_tbsize; constchar*buffer=luaL_checklstring(L, -1, &bsize);
msgpack_enc_string(L, &B, buffer, bsize);
 }
break;
caseLUA_TNUMBER:
if (lua_isinteger(L, -1))
msgpack_enc_integer(&B, lua_tointeger(L, -1));
else
msgpack_enc_number(&B, lua_tonumber(L, -1));
break;
caseLUA_TTABLE:
msgpack_enc_map(L, &B);
break;
default:
B.L=NULL; xrio_pushresult(&B);
returnluaL_error(L, "[msgpack encode]: Unsupported map value type `%s`.", lua_typename(L, vt));
 }
lua_pop(L, 1);
count++;
 }

if (count <= 15)
xrio_addchar(root, 0x80+count);
elseif(count <= UINT16_MAX)
xrio_addchar(root, MSG_TYPE_MAP16);
elseif(count <= UINT32_MAX)
xrio_addchar(root, MSG_TYPE_MAP32);
else {
B.L=NULL; xrio_pushresult(&B);
returnluaL_error(L, "[msgpack encode]: Invalid map items `%zu`.", count);
 }

if (count&&B.bidx)
xrio_addlstring(root, B.b, B.bidx);

B.L=NULL; xrio_pushresult(&B);
return0;
}

intlmsgpack_encode(lua_State*L) {
if (!lua_istable(L, 1))
returnluaL_error(L, "[msgpack error]: encode need a lua table.");
lua_settop(L, 1);

xrio_Bufferroot;
xrio_buffinit(L, &root);
msgpack_enc_map(L, &root);
xrio_pushresult(&root);
return1;
}