src/lexer.c

   1 /*!@file
   2   \brief   lexical analyzer implementation for APC
   3   \details The lexer manages two FIFO stacks.  One for maintaining tokens, the
   4            other for maintaining a list of files to be scanned.  During
   5            execution, the lexer will return a token from its token queue if any
   6            are present.  If not, the lexer will will pop an element from its
   7            file queue to 'scanner' to be tokenized.  If the file queue is empty,
   8            the lexer will instead call 'parsedir' to traverse the directory tree
   9            and tokenize the results.  If 'parsedir' does not generate any new
  10            tokens, we are done.
  11   \author  Jordan Lavatai
  12   \date    Aug 2016
  13   ----------------------------------------------------------------------------*/
  14 /* Standard */
  15 #include <stdio.h>
  16 #include <string.h>
  17 #include <stdint.h>
  18 #include <errno.h>
  19 /* Posix */
  20 #include <unistd.h>
  21 #include <unitypes.h>
  22 #include <unistr.h>
  23 #include <uniconv.h>
  24 #include <uniname.h>
  25 #include <unistdio.h>
  26 #include <stdlib.h>
  27 #include <dirent.h>
  28 /* Local */
  29 #include "apc.h"
  30 #include "parser.tab.h"
  31 /* Public */
  32 /* Private */
  33 extern //lexer.rl
  34 int lexer_lexstring(uint8_t const*, int);
  35 extern //scanner.c
  36 yypstate* apc_pstate;
  37 extern //scanner.c
  38 yycstate* apc_cstate;
  39
  40