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/* luatools.c
*
* Lua Tools
*
*
*/
#include <lauxlib.h>
#include <lualib.h>
#include <stdio.h>
#include <string.h>
#include "luatools.h"
const char *luaGetFieldString(lua_State *L, const char *key)
{
if (!L || !key)
return NULL;
const char *ret = NULL;
/* push the key string onto stack */
lua_pushstring(L, key);
lua_gettable(L, -2);
if (!lua_isstring(L, -1))
{
fprintf(stderr, "Lua: \"%s\" field within the table is not a string\n", key);
lua_pop(L, 1);
return ret;
}
ret = lua_tostring(L, -1); /* should this be freed at some point? */
lua_pop(L, 1);
return ret;
}
double luaGetFieldNumber(lua_State *L, const char *key)
{
if (!L || !key)
return -1.0;
double ret = -1.0;
/* push the key string onto stack */
lua_pushstring(L, key);
/* remember, -1 points to top of the stack, our table should a second
* item from the top, this call effectively accesses t[key] and
* pushes that value on the stack */
lua_gettable(L, -2);
if (!lua_isnumber(L, -1))
{
fprintf(stderr, "Lua: \"%s\" field within the table is NaN\n", key);
lua_pop(L, 1);
return ret;
}
/* finally retrieve our value */
ret = lua_tonumber(L, -1);
/* value is no longer needed, pop it */
lua_pop(L, 1);
return ret;
}
int luaLoadConfig(lua_State *L, const char *fname)
{
if (!L || !fname)
return -1;
int status;
/* load the file containing the config */
/* call a function, what function? dry run the script? */
status = (luaL_loadfile(L, fname) || lua_pcall(L, 0, 0, 0));
if (status)
{
fprintf(stderr, "Lua: %s\n", lua_tostring(L, -1));
return -1;
}
return 0;
}
int luaFillTablePlatform(lua_State *L, struct luat_table_platform *p)
{
if (!L || !p)
return -1;
double ret;
const char *ret_str = NULL;
/* pushes the table on the stack */
lua_getglobal(L, "platform");
if (!lua_istable(L, -1))
{
fprintf(stderr, "Lua: failed to parse \"platform\" table\n");
lua_pop(L, 1);
return -1;
}
if ((ret_str = luaGetFieldString(L, "name")) != NULL)
p->name = ret_str;
if ((ret_str = luaGetFieldString(L, "icon")) != NULL)
p->icon = ret_str;
if ((ret = luaGetFieldNumber(L, "xres")) != -1.0)
p->xres = (unsigned int) ret;
if ((ret = luaGetFieldNumber(L, "yres")) != -1.0)
p->yres = (unsigned int) ret;
if ((ret = luaGetFieldNumber(L, "bpp")) != -1.0)
p->bpp = (unsigned int) ret;
if ((ret = luaGetFieldNumber(L, "af")) != -1.0)
p->af = (unsigned int) ret;
if ((ret = luaGetFieldNumber(L, "fovy")) != -1.0)
p->fovy = (float) ret;
if ((ret = luaGetFieldNumber(L, "znear")) != -1.0)
p->znear = (float) ret;
if ((ret = luaGetFieldNumber(L, "zfar")) != -1.0)
p->zfar = (float) ret;
if ((ret = luaGetFieldNumber(L, "maxfps")) != -1.0)
p->maxfps = (unsigned int) ret;
/* pop the table */
lua_pop(L, 1);
return 0;
}
void luaPrintTablePlatform(struct luat_table_platform *p)
{
if (!p)
return;
printf("-- Lua platform config file --\n"
" name : %s\n"
" icon : %s\n"
" xres : %u\n"
" yres : %u\n"
" bpp : %u\n"
" af : %u\n"
" fovy : %f\n"
" znear : %f\n"
" zfar : %f\n"
" maxfps: %u\n",
p->name, p->icon, p->xres, p->yres, p->bpp, p->af,
p->fovy, p->znear, p->zfar, p->maxfps);
puts("");
}
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