/games/minimal/mods/default/textures/

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/*
** $Id: llex.c,v 2.20.1.2 2009/11/23 14:58:22 roberto Exp $
** Lexical Analyzer
** See Copyright Notice in lua.h
*/


#include <ctype.h>
#include <locale.h>
#include <string.h>

#define llex_c
#define LUA_CORE

#include "lua.h"

#include "ldo.h"
#include "llex.h"
#include "lobject.h"
#include "lparser.h"
#include "lstate.h"
#include "lstring.h"
#include "ltable.h"
#include "lzio.h"



#define next(ls) (ls->current = zgetc(ls->z))




#define currIsNewline(ls)	(ls->current == '\n' || ls->current == '\r')


/* ORDER RESERVED */
const char *const luaX_tokens [] = {
    "and", "break", "do", "else", "elseif",
    "end", "false", "for", "function", "if",
    "in", "local", "nil", "not", "or", "repeat",
    "return", "then", "true", "until", "while",
    "..", "...", "==", ">=", "<=", "~=",
    "<number>", "<name>", "<string>", "<eof>",
    NULL
};


#define save_and_next(ls) (save(ls, ls->current), next(ls))


static void save (LexState *ls, int c) {
  Mbuffer *b = ls->buff;
  if (b->n + 1 > b->buffsize) {
    size_t newsize;
    if (b->buffsize >= MAX_SIZET/2)
      luaX_lexerror(ls, "lexical element too long", 0);
    newsize = b->buffsize * 2;
    luaZ_resizebuffer(ls->L, b, newsize);
  }
  b->buffer[b->n++] = cast(char, c);
}


void luaX_init (lua_State *L) {
  int i;
  for (i=0; i<NUM_RESERVED; i++) {
    TString *ts = luaS_new(L, luaX_tokens[i]);
    luaS_fix(ts);  /* reserved words are never collected */
    lua_assert(strlen(luaX_tokens[i])+1 <= TOKEN_LEN);
    ts->tsv.reserved = cast_byte(i+1);  /* reserved word */
  }
}


#define MAXSRC          80


const char *luaX_token2str (LexState *ls, int token) {
  if (token < FIRST_RESERVED) {
    lua_assert(token == cast(unsigned char, token));
    return (iscntrl(token)) ? luaO_pushfstring(ls->L, "char(%d)", token) :
                              luaO_pushfstring(ls->L, "%c", token);
  }
  else
    return luaX_tokens[token-FIRST_RESERVED];
}


static const char *txtToken (LexState *ls, int token) {
  switch (token) {
    case TK_NAME:
    case TK_STRING:
    case TK_NUMBER:
      save(ls, '\0');
      return luaZ_buffer(ls->buff);
    default:
      return luaX_token2str(ls, token);
  }
}


void luaX_lexerror (LexState *ls, const char *msg, int token) {
  char buff[MAXSRC];
  luaO_chunkid(buff, getstr(ls->source), MAXSRC);
  msg = luaO_pushfstring(ls->L, "%s:%d: %s", buff, ls->linenumber, msg);
  if (token)
    luaO_pushfstring(ls->L, "%s near " LUA_QS, msg, txtToken(ls, token));
  luaD_throw(ls->L, LUA_ERRSYNTAX);
}


void luaX_syntaxerror (LexState *ls, const char *msg) {
  luaX_lexerror(ls, msg, ls->t.token);
}