#include <TH.h>
#include <luaT.h>

#define torch_(NAME) TH_CONCAT_3(torch_, Real, NAME)
#define torch_Tensor TH_CONCAT_STRING_3(torch., Real, Tensor)
#define libppm_(NAME) TH_CONCAT_3(libppm_, Real, NAME)

/* Get the next character in the file, skipping over comments, which
 * start with a # and continue to the end of the line. 
 */
static char ppm_getc(FILE *fp)
{
   char ch;

   ch = (char)getc(fp);
   if (ch == '#') {
      do {
         ch = (char)getc(fp);
      } while (ch != '\n' && ch != '\r');
   }

   return ch;
}

/* Get the next integer, skipping whitespace and comments. */
static long ppm_get_long(FILE *fp)
{
   char ch;
   long i = 0;

   do {
      ch = ppm_getc(fp);
   } while (ch == ' ' || ch == ',' || ch == '\t' || ch == '\n' || ch == '\r');

   do {
      i = i * 10 + ch - '0';
      ch = ppm_getc(fp);
   } while (ch >= '0' && ch <= '9');

   return i;
}

#include "generic/ppm.c"
#include "THGenerateAllTypes.h"

DLL_EXPORT int luaopen_libppm(lua_State *L)
{
  libppm_FloatMain_init(L);
  libppm_DoubleMain_init(L);
  libppm_ByteMain_init(L);

  lua_newtable(L);
  lua_pushvalue(L, -1);
  lua_setglobal(L, "libppm");

  lua_newtable(L);
  luaT_setfuncs(L, libppm_DoubleMain__, 0);
  lua_setfield(L, -2, "double");

  lua_newtable(L);
  luaT_setfuncs(L, libppm_FloatMain__, 0);
  lua_setfield(L, -2, "float");

  lua_newtable(L);
  luaT_setfuncs(L, libppm_ByteMain__, 0);
  lua_setfield(L, -2, "byte");

  return 1;
}