diff options
Diffstat (limited to 'ThirdParty/tolua-5.2.4/src/lib/tolua_is.c')
| -rw-r--r-- | ThirdParty/tolua-5.2.4/src/lib/tolua_is.c | 567 |
1 files changed, 567 insertions, 0 deletions
diff --git a/ThirdParty/tolua-5.2.4/src/lib/tolua_is.c b/ThirdParty/tolua-5.2.4/src/lib/tolua_is.c new file mode 100644 index 0000000..c28e01a --- /dev/null +++ b/ThirdParty/tolua-5.2.4/src/lib/tolua_is.c @@ -0,0 +1,567 @@ +/* tolua: functions to check types. + ** Support code for Lua bindings. + ** Written by Waldemar Celes + ** TeCGraf/PUC-Rio + ** Apr 2003 + ** $Id: tolua_is.c,v 1.5 2009/11/24 16:45:15 fabraham Exp $ + */ + +/* This code is free software; you can redistribute it and/or modify it. + ** The software provided hereunder is on an "as is" basis, and + ** the author has no obligation to provide maintenance, support, updates, + ** enhancements, or modifications. + */ + +#include "tolua.h" +#include "lauxlib.h" + +#include <stdlib.h> +#include <string.h> + +/* Push and returns the corresponding object typename */ +TOLUA_API const char* tolua_typename (lua_State* L, int lo) +{ + int tag = lua_type(L,lo); + if (tag == LUA_TNONE) + lua_pushstring(L,"[no object]"); + else if (tag != LUA_TUSERDATA && tag != LUA_TTABLE) + lua_pushstring(L,lua_typename(L,tag)); + else if (tag == LUA_TUSERDATA) + { + if (!lua_getmetatable(L,lo)) { + lua_pushstring(L,lua_typename(L,tag)); + } + else + { + lua_rawget(L,LUA_REGISTRYINDEX); + if (!lua_isstring(L,-1)) + { + lua_pop(L,1); + lua_pushstring(L,"[undefined]"); + } + } + } + else /* is table */ + { + lua_pushvalue(L,lo); + lua_rawget(L,LUA_REGISTRYINDEX); + if (!lua_isstring(L,-1)) + { + lua_pop(L,1); + lua_pushstring(L,"table"); + } + else + { + lua_pushstring(L,"class "); + lua_insert(L,-2); + lua_concat(L,2); + } + } + return lua_tostring(L,-1); +} + +TOLUA_API void tolua_error (lua_State* L, const char* msg, tolua_Error* err) +{ + if (msg[0] == '#') + { + const char* expected = err->type; + const char* provided = tolua_typename(L,err->index); + if (msg[1]=='f') + { + int narg = err->index; + if (err->array) + luaL_error(L,"%s\n argument #%d is array of '%s'; array of '%s' expected.\n", + msg+2,narg,provided,expected); + else + luaL_error(L,"%s\n argument #%d is '%s'; '%s' expected.\n", + msg+2,narg,provided,expected); + } + else if (msg[1]=='v') + { + if (err->array) + luaL_error(L,"%s\n value is array of '%s'; array of '%s' expected.\n", + msg+2,provided,expected); + else + luaL_error(L,"%s\n value is '%s'; '%s' expected.\n", + msg+2,provided,expected); + } + } + else + luaL_error(L,msg); +} + +/* the equivalent of lua_is* for usertable */ +static int lua_isusertable (lua_State* L, int lo, const char* type) +{ + int r = 0; + if (lo < 0) lo = lua_gettop(L)+lo+1; + lua_pushvalue(L,lo); + lua_rawget(L,LUA_REGISTRYINDEX); /* get registry[t] */ + if (lua_isstring(L,-1)) + { + r = strcmp(lua_tostring(L,-1),type)==0; + if (!r) + { + /* try const */ + lua_pushstring(L,"const "); + lua_insert(L,-2); + lua_concat(L,2); + r = lua_isstring(L,-1) && strcmp(lua_tostring(L,-1),type)==0; + } + } + lua_pop(L, 1); + return r; +} + +/* the equivalent of lua_is* for usertype */ +static int lua_isusertype (lua_State* L, int lo, const char* type) +{ + if (lua_isuserdata(L,lo)) + { + /* check if it is of the same type */ + int r; + const char *tn; + if (lua_getmetatable(L,lo)) /* if metatable? */ + { + lua_rawget(L,LUA_REGISTRYINDEX); /* get registry[mt] */ + tn = lua_tostring(L,-1); + r = tn && (strcmp(tn,type) == 0); + lua_pop(L, 1); + if (r) + return 1; + else + { + /* check if it is a specialized class */ + lua_pushstring(L,"tolua_super"); + lua_rawget(L,LUA_REGISTRYINDEX); /* get super */ + lua_getmetatable(L,lo); + lua_rawget(L,-2); /* get super[mt] */ + if (lua_istable(L,-1)) + { + int b; + lua_pushstring(L,type); + lua_rawget(L,-2); /* get super[mt][type] */ + b = lua_toboolean(L,-1); + lua_pop(L,3); + if (b) + return 1; + } + } + } + } + return 0; +} + +TOLUA_API int tolua_isnoobj (lua_State* L, int lo, tolua_Error* err) +{ + if (lua_gettop(L)<abs(lo)) + return 1; + err->index = lo; + err->array = 0; + err->type = NULL; + return 0; +} +TOLUA_API int tolua_isvalue (lua_State* L, int lo, int def, tolua_Error* err) +{ + if (def || abs(lo)<=lua_gettop(L)) /* any valid index */ + return 1; + err->index = lo; + err->array = 0; + err->type = "value"; + return 0; +} + +TOLUA_API int tolua_isboolean (lua_State* L, int lo, int def, tolua_Error* err) +{ + if (def && lua_gettop(L)<abs(lo)) + return 1; + if (lua_isnil(L,lo) || lua_isboolean(L,lo)) + return 1; + err->index = lo; + err->array = 0; + err->type = "boolean"; + return 0; +} + +TOLUA_API int tolua_isnumber (lua_State* L, int lo, int def, tolua_Error* err) +{ + if (def && lua_gettop(L)<abs(lo)) + return 1; + if (lua_isnumber(L,lo)) + return 1; + err->index = lo; + err->array = 0; + err->type = "number"; + return 0; +} + +TOLUA_API int tolua_isstring (lua_State* L, int lo, int def, tolua_Error* err) +{ + if (def && lua_gettop(L)<abs(lo)) + return 1; + if (lua_isnil(L,lo) || lua_isstring(L,lo)) + return 1; + err->index = lo; + err->array = 0; + err->type = "string"; + return 0; +} + +TOLUA_API int tolua_istable (lua_State* L, int lo, int def, tolua_Error* err) +{ + if (def && lua_gettop(L)<abs(lo)) + return 1; + if (lua_istable(L,lo)) + return 1; + err->index = lo; + err->array = 0; + err->type = "table"; + return 0; +} + +TOLUA_API int tolua_isusertable (lua_State* L, int lo, const char* type, int def, tolua_Error* err) +{ + if (def && lua_gettop(L)<abs(lo)) + return 1; + if (lua_isusertable(L,lo,type)) + return 1; + err->index = lo; + err->array = 0; + err->type = type; + return 0; +} + +TOLUA_API int tolua_isfunction (lua_State* L, int lo, int def, tolua_Error* err) +{ + if (def && lua_gettop(L)<abs(lo)) + return 1; + if (lua_isfunction(L,lo)) + return 1; + err->index = lo; + err->array = 0; + err->type = "function"; + return 0; +} + +TOLUA_API int tolua_isuserdata (lua_State* L, int lo, int def, tolua_Error* err) +{ + if (def && lua_gettop(L)<abs(lo)) + return 1; + if (lua_isnil(L,lo) || lua_isuserdata(L,lo)) + return 1; + err->index = lo; + err->array = 0; + err->type = "userdata"; + return 0; +} + +TOLUA_API int tolua_isusertype (lua_State* L, int lo, const char* type, int def, tolua_Error* err) +{ + if (def && lua_gettop(L)<abs(lo)) + return 1; + if (lua_isnil(L,lo) || lua_isusertype(L,lo,type)) + return 1; + err->index = lo; + err->array = 0; + err->type = type; + return 0; +} + +TOLUA_API int tolua_isvaluearray +(lua_State* L, int lo, int dim, int def, tolua_Error* err) +{ + if (!tolua_istable(L,lo,def,err)) + return 0; + else + return 1; +} + +TOLUA_API int tolua_isbooleanarray +(lua_State* L, int lo, int dim, int def, tolua_Error* err) +{ + if (!tolua_istable(L,lo,def,err)) + return 0; + else + { + int i; + for (i=1; i<=dim; ++i) + { + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (!(lua_isnil(L,-1) || lua_isboolean(L,-1)) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = "boolean"; + return 0; + } + lua_pop(L,1); + } + } + return 1; +} + +TOLUA_API int tolua_isnumberarray +(lua_State* L, int lo, int dim, int def, tolua_Error* err) +{ + if (!tolua_istable(L,lo,def,err)) + return 0; + else + { + int i; + for (i=1; i<=dim; ++i) + { + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (!lua_isnumber(L,-1) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = "number"; + return 0; + } + lua_pop(L,1); + } + } + return 1; +} + +TOLUA_API int tolua_isstringarray +(lua_State* L, int lo, int dim, int def, tolua_Error* err) +{ + if (!tolua_istable(L,lo,def,err)) + return 0; + else + { + int i; + for (i=1; i<=dim; ++i) + { + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (!(lua_isnil(L,-1) || lua_isstring(L,-1)) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = "string"; + return 0; + } + lua_pop(L,1); + } + } + return 1; +} + +TOLUA_API int tolua_istablearray +(lua_State* L, int lo, int dim, int def, tolua_Error* err) +{ + if (!tolua_istable(L,lo,def,err)) + return 0; + else + { + int i; + for (i=1; i<=dim; ++i) + { + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (! lua_istable(L,-1) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = "table"; + return 0; + } + lua_pop(L,1); + } + } + return 1; +} + +TOLUA_API int tolua_isuserdataarray +(lua_State* L, int lo, int dim, int def, tolua_Error* err) +{ + if (!tolua_istable(L,lo,def,err)) + return 0; + else + { + int i; + for (i=1; i<=dim; ++i) + { + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (!(lua_isnil(L,-1) || lua_isuserdata(L,-1)) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = "userdata"; + return 0; + } + lua_pop(L,1); + } + } + return 1; +} + +TOLUA_API int tolua_isusertypearray +(lua_State* L, int lo, const char* type, int dim, int def, tolua_Error* err) +{ + if (!tolua_istable(L,lo,def,err)) + return 0; + else + { + int i; + for (i=1; i<=dim; ++i) + { + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (!(lua_isnil(L,-1) || lua_isuserdata(L,-1)) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->type = type; + err->array = 1; + return 0; + } + lua_pop(L,1); + } + } + return 1; +} + +#if 0 +int tolua_isbooleanfield +(lua_State* L, int lo, int i, int def, tolua_Error* err) +{ + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (!(lua_isnil(L,-1) || lua_isboolean(L,-1)) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = "boolean"; + return 0; + } + lua_pop(L,1); + return 1; +} + +int tolua_isnumberfield +(lua_State* L, int lo, int i, int def, tolua_Error* err) +{ + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (!lua_isnumber(L,-1) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = "number"; + return 0; + } + lua_pop(L,1); + return 1; +} + +int tolua_isstringfield +(lua_State* L, int lo, int i, int def, tolua_Error* err) +{ + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (!(lua_isnil(L,-1) || lua_isstring(L,-1)) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = "string"; + return 0; + } + lua_pop(L,1); + return 1; +} + +int tolua_istablefield +(lua_State* L, int lo, int i, int def, tolua_Error* err) +{ + lua_pushnumber(L,i+1); + lua_gettable(L,lo); + if (! lua_istable(L,-1) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = "table"; + return 0; + } + lua_pop(L,1); +} + +int tolua_isusertablefield +(lua_State* L, int lo, const char* type, int i, int def, tolua_Error* err) +{ + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (! lua_isusertable(L,-1,type) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = type; + return 0; + } + lua_pop(L,1); + return 1; +} + +int tolua_isuserdatafield +(lua_State* L, int lo, int i, int def, tolua_Error* err) +{ + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (!(lua_isnil(L,-1) || lua_isuserdata(L,-1)) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->array = 1; + err->type = "userdata"; + return 0; + } + lua_pop(L,1); + return 1; +} + +int tolua_isusertypefield +(lua_State* L, int lo, const char* type, int i, int def, tolua_Error* err) +{ + lua_pushnumber(L,i); + lua_gettable(L,lo); + if (!(lua_isnil(L,-1) || lua_isusertype(L,-1,type)) && + !(def && lua_isnil(L,-1)) + ) + { + err->index = lo; + err->type = type; + err->array = 1; + return 0; + } + lua_pop(L,1); + return 1; +} + +#endif |