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/*
* min.c -- a minimal Lua interpreter
* loads stdin only with minimal error handling.
* no interaction, and no standard library, only a "print" function.
*/
#include <stdio.h>
#include "lua.h"
#include "lauxlib.h"
static int print(lua_State *L)
{
int n=lua_gettop(L);
int i;
for (i=1; i<=n; i++)
{
if (i>1) printf("\t");
if (lua_isstring(L,i))
printf("%s",lua_tostring(L,i));
else if (lua_isnil(L,i))
printf("%s","nil");
else if (lua_isboolean(L,i))
printf("%s",lua_toboolean(L,i) ? "true" : "false");
else
printf("%s:%p",lua_typename(L,lua_type(L,i)),lua_topointer(L,i));
}
printf("\n");
return 0;
}
static const char *getF(lua_State *L, void *ud, size_t *size)
{
FILE *f=(FILE *)ud;
static char buff[512];
if (feof(f)) return NULL;
*size=fread(buff,1,sizeof(buff),f);
return (*size>0) ? buff : NULL;
}
int main(void)
{
lua_State *L=lua_open();
lua_register(L,"print",print);
if (lua_load(L,getF,stdin,"=stdin") || lua_pcall(L,0,0,0))
fprintf(stderr,"%s\n",lua_tostring(L,-1));
lua_close(L);
return 0;
}
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