| /* |
| ** inout.c |
| ** Provide function to realise the input/output function and debugger |
| ** facilities. |
| ** Also provides some predefined lua functions. |
| */ |
| |
| char *rcs_inout="$Id: inout.c,v 2.24 1995/10/23 13:54:11 roberto Exp roberto $"; |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "mem.h" |
| #include "opcode.h" |
| #include "hash.h" |
| #include "inout.h" |
| #include "table.h" |
| #include "tree.h" |
| #include "lua.h" |
| |
| |
| #ifndef MAXFUNCSTACK |
| #define MAXFUNCSTACK 100 |
| #endif |
| |
| #define MAXMESSAGE MAXFUNCSTACK*80 |
| |
| |
| /* Exported variables */ |
| Word lua_linenumber; |
| Bool lua_debug = 0; |
| char *lua_parsedfile; |
| |
| |
| static FILE *fp; |
| static char *st; |
| |
| /* |
| ** Function to get the next character from the input file |
| */ |
| static int fileinput (void) |
| { |
| return fgetc (fp); |
| } |
| |
| /* |
| ** Function to get the next character from the input string |
| */ |
| static int stringinput (void) |
| { |
| return *st++; |
| } |
| |
| /* |
| ** Function to open a file to be input unit. |
| ** Return 0 on success or error message on error. |
| */ |
| char *lua_openfile (char *fn) |
| { |
| lua_setinput (fileinput); |
| if (fn == NULL) |
| { |
| fp = stdin; |
| fn = "(stdin)"; |
| } |
| else |
| fp = fopen (fn, "r"); |
| if (fp == NULL) |
| { |
| static char buff[255]; |
| sprintf(buff, "unable to open file `%.200s'", fn); |
| return buff; |
| } |
| lua_linenumber = 1; |
| lua_parsedfile = lua_constcreate(fn)->ts.str; |
| return NULL; |
| } |
| |
| /* |
| ** Function to close an opened file |
| */ |
| void lua_closefile (void) |
| { |
| if (fp != NULL && fp != stdin) |
| { |
| fclose (fp); |
| fp = NULL; |
| } |
| } |
| |
| /* |
| ** Function to open a string to be input unit |
| */ |
| void lua_openstring (char *s) |
| { |
| lua_setinput (stringinput); |
| st = s; |
| lua_linenumber = 1; |
| lua_parsedfile = lua_constcreate("(string)")->ts.str; |
| } |
| |
| /* |
| ** Function to close an opened string |
| */ |
| void lua_closestring (void) |
| { |
| } |
| |
| |
| /* |
| ** Internal function: do a string |
| */ |
| void lua_internaldostring (void) |
| { |
| lua_Object obj = lua_getparam (1); |
| if (lua_isstring(obj) && !lua_dostring(lua_getstring(obj))) |
| lua_pushnumber(1); |
| else |
| lua_pushnil(); |
| } |
| |
| /* |
| ** Internal function: do a file |
| */ |
| void lua_internaldofile (void) |
| { |
| lua_Object obj = lua_getparam (1); |
| if (lua_isstring(obj) && !lua_dofile(lua_getstring(obj))) |
| lua_pushnumber(1); |
| else |
| lua_pushnil(); |
| } |
| |
| /* |
| ** Internal function: print object values |
| */ |
| void lua_print (void) |
| { |
| int i=1; |
| lua_Object obj; |
| while ((obj=lua_getparam (i++)) != LUA_NOOBJECT) |
| { |
| if (lua_isnumber(obj)) printf("%g\n",lua_getnumber(obj)); |
| else if (lua_isstring(obj)) printf("%s\n",lua_getstring(obj)); |
| else if (lua_isfunction(obj)) printf("function: %p\n",(luaI_Address(obj))->value.tf); |
| else if (lua_iscfunction(obj)) printf("cfunction: %p\n",lua_getcfunction(obj) |
| ); |
| else if (lua_isuserdata(obj)) printf("userdata: %p\n",lua_getuserdata(obj)); |
| else if (lua_istable(obj)) printf("table: %p\n",avalue(luaI_Address(obj))); |
| else if (lua_isnil(obj)) printf("nil\n"); |
| else printf("invalid value to print\n"); |
| } |
| } |
| |
| |
| /* |
| ** Internal function: return an object type. |
| */ |
| void luaI_type (void) |
| { |
| lua_Object o = lua_getparam(1); |
| int t; |
| if (o == LUA_NOOBJECT) |
| lua_error("no parameter to function 'type'"); |
| t = lua_type(o); |
| switch (t) |
| { |
| case LUA_T_NIL : |
| lua_pushliteral("nil"); |
| break; |
| case LUA_T_NUMBER : |
| lua_pushliteral("number"); |
| break; |
| case LUA_T_STRING : |
| lua_pushliteral("string"); |
| break; |
| case LUA_T_ARRAY : |
| lua_pushliteral("table"); |
| break; |
| case LUA_T_FUNCTION : |
| case LUA_T_CFUNCTION : |
| lua_pushliteral("function"); |
| break; |
| default : |
| lua_pushliteral("userdata"); |
| break; |
| } |
| lua_pushnumber(t); |
| } |
| |
| /* |
| ** Internal function: convert an object to a number |
| */ |
| void lua_obj2number (void) |
| { |
| lua_Object o = lua_getparam(1); |
| if (lua_isnumber(o)) |
| lua_pushobject(o); |
| else if (lua_isstring(o)) |
| { |
| char c; |
| float f; |
| if (sscanf(lua_getstring(o),"%f %c",&f,&c) == 1) |
| lua_pushnumber(f); |
| else |
| lua_pushnil(); |
| } |
| else |
| lua_pushnil(); |
| } |
| |
| |
| void luaI_error (void) |
| { |
| char *s = lua_getstring(lua_getparam(1)); |
| if (s == NULL) s = "(no message)"; |
| lua_error(s); |
| } |
| |