misc/liblua/llex.c
author Wuzzy <Wuzzy2@mail.ru>
Fri, 09 Mar 2018 19:05:59 +0100
changeset 13145 5083fb0a2992
parent 10017 de822cd3df3a
permissions -rw-r--r--
A Classic Fairytale: Harden all missions against missing campaign variables in team file and assume default values This assumes the worst case in which the team file is missing all campaign variables except Progress. This has been successfully tested with all 10 missions and still generates a logical storyline. By default, the game assumes: - The cyborg's offer in mission 2 was refused - The traitor in mission 5 was killed As a consequence, missions 8 and 10 use the princessScene cut scene.
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/*
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** $Id: llex.c,v 2.20.1.1 2007/12/27 13:02:25 roberto Exp $
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** Lexical Analyzer
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** See Copyright Notice in lua.h
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*/
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#include <ctype.h>
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#include <locale.h>
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#include <string.h>
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#define llex_c
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#define LUA_CORE
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#include "lua.h"
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#include "ldo.h"
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#include "llex.h"
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#include "lobject.h"
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#include "lparser.h"
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#include "lstate.h"
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#include "lstring.h"
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#include "ltable.h"
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#include "lzio.h"
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#define next(ls) (ls->current = zgetc(ls->z))
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#define currIsNewline(ls)   (ls->current == '\n' || ls->current == '\r')
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/* ORDER RESERVED */
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const char *const luaX_tokens [] = {
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    "and", "break", "do", "else", "elseif",
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    "end", "false", "for", "function", "if",
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    "in", "local", "nil", "not", "or", "repeat",
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    "return", "then", "true", "until", "while",
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    "..", "...", "==", ">=", "<=", "~=",
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    "<number>", "<name>", "<string>", "<eof>",
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    NULL
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};
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#define save_and_next(ls) (save(ls, ls->current), next(ls))
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static void save (LexState *ls, int c) {
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  Mbuffer *b = ls->buff;
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  if (b->n + 1 > b->buffsize) {
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    size_t newsize;
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    if (b->buffsize >= MAX_SIZET/2)
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      luaX_lexerror(ls, "lexical element too long", 0);
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    newsize = b->buffsize * 2;
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    luaZ_resizebuffer(ls->L, b, newsize);
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  }
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  b->buffer[b->n++] = cast(char, c);
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}
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void luaX_init (lua_State *L) {
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  int i;
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  for (i=0; i<NUM_RESERVED; i++) {
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    TString *ts = luaS_new(L, luaX_tokens[i]);
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    luaS_fix(ts);  /* reserved words are never collected */
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    lua_assert(strlen(luaX_tokens[i])+1 <= TOKEN_LEN);
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    ts->tsv.reserved = cast_byte(i+1);  /* reserved word */
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  }
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}
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#define MAXSRC          80
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const char *luaX_token2str (LexState *ls, int token) {
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  if (token < FIRST_RESERVED) {
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    lua_assert(token == cast(unsigned char, token));
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    return (iscntrl(token)) ? luaO_pushfstring(ls->L, "char(%d)", token) :
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                              luaO_pushfstring(ls->L, "%c", token);
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  }
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  else
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    return luaX_tokens[token-FIRST_RESERVED];
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}
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static const char *txtToken (LexState *ls, int token) {
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  switch (token) {
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    case TK_NAME:
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    case TK_STRING:
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    case TK_NUMBER:
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      save(ls, '\0');
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      return luaZ_buffer(ls->buff);
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    default:
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      return luaX_token2str(ls, token);
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  }
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}
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void luaX_lexerror (LexState *ls, const char *msg, int token) {
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  char buff[MAXSRC];
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  luaO_chunkid(buff, getstr(ls->source), MAXSRC);
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  msg = luaO_pushfstring(ls->L, "%s:%d: %s", buff, ls->linenumber, msg);
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  if (token)
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    luaO_pushfstring(ls->L, "%s near " LUA_QS, msg, txtToken(ls, token));
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  luaD_throw(ls->L, LUA_ERRSYNTAX);
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}
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void luaX_syntaxerror (LexState *ls, const char *msg) {
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  luaX_lexerror(ls, msg, ls->t.token);
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}
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TString *luaX_newstring (LexState *ls, const char *str, size_t l) {
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  lua_State *L = ls->L;
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  TString *ts = luaS_newlstr(L, str, l);
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  TValue *o = luaH_setstr(L, ls->fs->h, ts);  /* entry for `str' */
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  if (ttisnil(o))
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    setbvalue(o, 1);  /* make sure `str' will not be collected */
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  return ts;
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}
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static void inclinenumber (LexState *ls) {
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  int old = ls->current;
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  lua_assert(currIsNewline(ls));
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  next(ls);  /* skip `\n' or `\r' */
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  if (currIsNewline(ls) && ls->current != old)
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    next(ls);  /* skip `\n\r' or `\r\n' */
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  if (++ls->linenumber >= MAX_INT)
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    luaX_syntaxerror(ls, "chunk has too many lines");
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}
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void luaX_setinput (lua_State *L, LexState *ls, ZIO *z, TString *source) {
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  ls->decpoint = '.';
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  ls->L = L;
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  ls->lookahead.token = TK_EOS;  /* no look-ahead token */
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  ls->z = z;
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  ls->fs = NULL;
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  ls->linenumber = 1;
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  ls->lastline = 1;
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  ls->source = source;
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  luaZ_resizebuffer(ls->L, ls->buff, LUA_MINBUFFER);  /* initialize buffer */
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  next(ls);  /* read first char */
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}
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/*
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** =======================================================
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** LEXICAL ANALYZER
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** =======================================================
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*/
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static int check_next (LexState *ls, const char *set) {
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  if (!strchr(set, ls->current))
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    return 0;
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  save_and_next(ls);
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  return 1;
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}
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static void buffreplace (LexState *ls, char from, char to) {
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  size_t n = luaZ_bufflen(ls->buff);
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  char *p = luaZ_buffer(ls->buff);
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  while (n--)
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    if (p[n] == from) p[n] = to;
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}
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static void trydecpoint (LexState *ls, SemInfo *seminfo) {
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  /* format error: try to update decimal point separator */
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#ifndef ANDROID
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  struct lconv *cv = localeconv();
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#endif
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  char old = ls->decpoint;
6039
d75329716a02 Removed the need for duplicate libraries, the android build now uses lua, freetype and tremor from misc/
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#ifdef ANDROID
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  ls->decpoint = '.';
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#else
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  ls->decpoint = (cv ? cv->decimal_point[0] : '.');
6039
d75329716a02 Removed the need for duplicate libraries, the android build now uses lua, freetype and tremor from misc/
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#endif
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  buffreplace(ls, old, ls->decpoint);  /* try updated decimal separator */
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   189
  if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r)) {
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   190
    /* format error with correct decimal point: no more options */
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   191
    buffreplace(ls, ls->decpoint, '.');  /* undo change (for error message) */
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    luaX_lexerror(ls, "malformed number", TK_NUMBER);
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   193
  }
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   194
}
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   195
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   196
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   197
/* LUA_NUMBER */
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   198
static void read_numeral (LexState *ls, SemInfo *seminfo) {
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   199
  lua_assert(isdigit(ls->current));
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   200
  do {
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diff changeset
   201
    save_and_next(ls);
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diff changeset
   202
  } while (isdigit(ls->current) || ls->current == '.');
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parents:
diff changeset
   203
  if (check_next(ls, "Ee"))  /* `E'? */
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parents:
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   204
    check_next(ls, "+-");  /* optional exponent sign */
0a24853de796 add liblua to sources for macosx
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parents:
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   205
  while (isalnum(ls->current) || ls->current == '_')
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   206
    save_and_next(ls);
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   207
  save(ls, '\0');
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   208
  buffreplace(ls, '.', ls->decpoint);  /* follow locale for decimal point */
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   209
  if (!luaO_str2d(luaZ_buffer(ls->buff), &seminfo->r))  /* format error? */
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   210
    trydecpoint(ls, seminfo); /* try to update decimal point separator */
0a24853de796 add liblua to sources for macosx
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parents:
diff changeset
   211
}
0a24853de796 add liblua to sources for macosx
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parents:
diff changeset
   212
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parents:
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   213
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   214
static int skip_sep (LexState *ls) {
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   215
  int count = 0;
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   216
  int s = ls->current;
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   217
  lua_assert(s == '[' || s == ']');
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parents:
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   218
  save_and_next(ls);
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parents:
diff changeset
   219
  while (ls->current == '=') {
0a24853de796 add liblua to sources for macosx
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   220
    save_and_next(ls);
0a24853de796 add liblua to sources for macosx
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   221
    count++;
0a24853de796 add liblua to sources for macosx
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   222
  }
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   223
  return (ls->current == s) ? count : (-count) - 1;
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   224
}
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diff changeset
   225
0a24853de796 add liblua to sources for macosx
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parents:
diff changeset
   226
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   227
static void read_long_string (LexState *ls, SemInfo *seminfo, int sep) {
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   228
  int cont = 0;
0a24853de796 add liblua to sources for macosx
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   229
  (void)(cont);  /* avoid warnings when `cont' is not used */
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   230
  save_and_next(ls);  /* skip 2nd `[' */
0a24853de796 add liblua to sources for macosx
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parents:
diff changeset
   231
  if (currIsNewline(ls))  /* string starts with a newline? */
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parents:
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   232
    inclinenumber(ls);  /* skip it */
0a24853de796 add liblua to sources for macosx
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parents:
diff changeset
   233
  for (;;) {
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parents:
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   234
    switch (ls->current) {
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   235
      case EOZ:
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   236
        luaX_lexerror(ls, (seminfo) ? "unfinished long string" :
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koda
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   237
                                   "unfinished long comment", TK_EOS);
0a24853de796 add liblua to sources for macosx
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parents:
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   238
        break;  /* to avoid warnings */
0a24853de796 add liblua to sources for macosx
koda
parents:
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   239
#if defined(LUA_COMPAT_LSTR)
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parents:
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   240
      case '[': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   241
        if (skip_sep(ls) == sep) {
0a24853de796 add liblua to sources for macosx
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parents:
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   242
          save_and_next(ls);  /* skip 2nd `[' */
0a24853de796 add liblua to sources for macosx
koda
parents:
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   243
          cont++;
0a24853de796 add liblua to sources for macosx
koda
parents:
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   244
#if LUA_COMPAT_LSTR == 1
0a24853de796 add liblua to sources for macosx
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   245
          if (sep == 0)
0a24853de796 add liblua to sources for macosx
koda
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   246
            luaX_lexerror(ls, "nesting of [[...]] is deprecated", '[');
0a24853de796 add liblua to sources for macosx
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   247
#endif
0a24853de796 add liblua to sources for macosx
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diff changeset
   248
        }
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   249
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   250
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   251
#endif
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   252
      case ']': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   253
        if (skip_sep(ls) == sep) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   254
          save_and_next(ls);  /* skip 2nd `]' */
0a24853de796 add liblua to sources for macosx
koda
parents:
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   255
#if defined(LUA_COMPAT_LSTR) && LUA_COMPAT_LSTR == 2
0a24853de796 add liblua to sources for macosx
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parents:
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   256
          cont--;
0a24853de796 add liblua to sources for macosx
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parents:
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   257
          if (sep == 0 && cont >= 0) break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   258
#endif
0a24853de796 add liblua to sources for macosx
koda
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   259
          goto endloop;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   260
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   261
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   262
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   263
      case '\n':
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   264
      case '\r': {
0a24853de796 add liblua to sources for macosx
koda
parents:
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   265
        save(ls, '\n');
0a24853de796 add liblua to sources for macosx
koda
parents:
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   266
        inclinenumber(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   267
        if (!seminfo) luaZ_resetbuffer(ls->buff);  /* avoid wasting space */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   268
        break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   269
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   270
      default: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   271
        if (seminfo) save_and_next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   272
        else next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   273
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   274
    }
0a24853de796 add liblua to sources for macosx
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parents:
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   275
  } endloop:
0a24853de796 add liblua to sources for macosx
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parents:
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   276
  if (seminfo)
0a24853de796 add liblua to sources for macosx
koda
parents:
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   277
    seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + (2 + sep),
0a24853de796 add liblua to sources for macosx
koda
parents:
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   278
                                     luaZ_bufflen(ls->buff) - 2*(2 + sep));
0a24853de796 add liblua to sources for macosx
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   279
}
0a24853de796 add liblua to sources for macosx
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parents:
diff changeset
   280
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   281
0a24853de796 add liblua to sources for macosx
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   282
static void read_string (LexState *ls, int del, SemInfo *seminfo) {
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koda
parents:
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   283
  save_and_next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   284
  while (ls->current != del) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   285
    switch (ls->current) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   286
      case EOZ:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   287
        luaX_lexerror(ls, "unfinished string", TK_EOS);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   288
        continue;  /* to avoid warnings */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   289
      case '\n':
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   290
      case '\r':
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   291
        luaX_lexerror(ls, "unfinished string", TK_STRING);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   292
        continue;  /* to avoid warnings */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   293
      case '\\': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   294
        int c;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   295
        next(ls);  /* do not save the `\' */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   296
        switch (ls->current) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   297
          case 'a': c = '\a'; break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   298
          case 'b': c = '\b'; break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   299
          case 'f': c = '\f'; break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   300
          case 'n': c = '\n'; break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   301
          case 'r': c = '\r'; break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   302
          case 't': c = '\t'; break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   303
          case 'v': c = '\v'; break;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   304
          case '\n':  /* go through */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   305
          case '\r': save(ls, '\n'); inclinenumber(ls); continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   306
          case EOZ: continue;  /* will raise an error next loop */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   307
          default: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   308
            if (!isdigit(ls->current))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   309
              save_and_next(ls);  /* handles \\, \", \', and \? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   310
            else {  /* \xxx */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   311
              int i = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   312
              c = 0;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   313
              do {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   314
                c = 10*c + (ls->current-'0');
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   315
                next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   316
              } while (++i<3 && isdigit(ls->current));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   317
              if (c > UCHAR_MAX)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   318
                luaX_lexerror(ls, "escape sequence too large", TK_STRING);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   319
              save(ls, c);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   320
            }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   321
            continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   322
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   323
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   324
        save(ls, c);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   325
        next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   326
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   327
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   328
      default:
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   329
        save_and_next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   330
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   331
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   332
  save_and_next(ls);  /* skip delimiter */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   333
  seminfo->ts = luaX_newstring(ls, luaZ_buffer(ls->buff) + 1,
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   334
                                   luaZ_bufflen(ls->buff) - 2);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   335
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   336
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   337
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   338
static int llex (LexState *ls, SemInfo *seminfo) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   339
  luaZ_resetbuffer(ls->buff);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   340
  for (;;) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   341
    switch (ls->current) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   342
      case '\n':
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   343
      case '\r': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   344
        inclinenumber(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   345
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   346
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   347
      case '-': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   348
        next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   349
        if (ls->current != '-') return '-';
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   350
        /* else is a comment */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   351
        next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   352
        if (ls->current == '[') {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   353
          int sep = skip_sep(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   354
          luaZ_resetbuffer(ls->buff);  /* `skip_sep' may dirty the buffer */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   355
          if (sep >= 0) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   356
            read_long_string(ls, NULL, sep);  /* long comment */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   357
            luaZ_resetbuffer(ls->buff);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   358
            continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   359
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   360
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   361
        /* else short comment */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   362
        while (!currIsNewline(ls) && ls->current != EOZ)
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   363
          next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   364
        continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   365
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   366
      case '[': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   367
        int sep = skip_sep(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   368
        if (sep >= 0) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   369
          read_long_string(ls, seminfo, sep);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   370
          return TK_STRING;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   371
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   372
        else if (sep == -1) return '[';
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   373
        else luaX_lexerror(ls, "invalid long string delimiter", TK_STRING);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   374
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   375
      case '=': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   376
        next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   377
        if (ls->current != '=') return '=';
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   378
        else { next(ls); return TK_EQ; }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   379
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   380
      case '<': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   381
        next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   382
        if (ls->current != '=') return '<';
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   383
        else { next(ls); return TK_LE; }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   384
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   385
      case '>': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   386
        next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   387
        if (ls->current != '=') return '>';
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   388
        else { next(ls); return TK_GE; }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   389
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   390
      case '~': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   391
        next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   392
        if (ls->current != '=') return '~';
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   393
        else { next(ls); return TK_NE; }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   394
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   395
      case '"':
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   396
      case '\'': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   397
        read_string(ls, ls->current, seminfo);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   398
        return TK_STRING;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   399
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   400
      case '.': {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   401
        save_and_next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   402
        if (check_next(ls, ".")) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   403
          if (check_next(ls, "."))
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   404
            return TK_DOTS;   /* ... */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   405
          else return TK_CONCAT;   /* .. */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   406
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   407
        else if (!isdigit(ls->current)) return '.';
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   408
        else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   409
          read_numeral(ls, seminfo);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   410
          return TK_NUMBER;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   411
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   412
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   413
      case EOZ: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   414
        return TK_EOS;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   415
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   416
      default: {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   417
        if (isspace(ls->current)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   418
          lua_assert(!currIsNewline(ls));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   419
          next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   420
          continue;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   421
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   422
        else if (isdigit(ls->current)) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   423
          read_numeral(ls, seminfo);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   424
          return TK_NUMBER;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   425
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   426
        else if (isalpha(ls->current) || ls->current == '_') {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   427
          /* identifier or reserved word */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   428
          TString *ts;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   429
          do {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   430
            save_and_next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   431
          } while (isalnum(ls->current) || ls->current == '_');
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   432
          ts = luaX_newstring(ls, luaZ_buffer(ls->buff),
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   433
                                  luaZ_bufflen(ls->buff));
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   434
          if (ts->tsv.reserved > 0)  /* reserved word? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   435
            return ts->tsv.reserved - 1 + FIRST_RESERVED;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   436
          else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   437
            seminfo->ts = ts;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   438
            return TK_NAME;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   439
          }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   440
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   441
        else {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   442
          int c = ls->current;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   443
          next(ls);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   444
          return c;  /* single-char tokens (+ - / ...) */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   445
        }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   446
      }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   447
    }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   448
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   449
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   450
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   451
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   452
void luaX_next (LexState *ls) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   453
  ls->lastline = ls->linenumber;
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   454
  if (ls->lookahead.token != TK_EOS) {  /* is there a look-ahead token? */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   455
    ls->t = ls->lookahead;  /* use this one */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   456
    ls->lookahead.token = TK_EOS;  /* and discharge it */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   457
  }
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   458
  else
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   459
    ls->t.token = llex(ls, &ls->t.seminfo);  /* read next token */
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   460
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   461
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   462
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   463
void luaX_lookahead (LexState *ls) {
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   464
  lua_assert(ls->lookahead.token == TK_EOS);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   465
  ls->lookahead.token = llex(ls, &ls->lookahead.seminfo);
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   466
}
0a24853de796 add liblua to sources for macosx
koda
parents:
diff changeset
   467