isl_stream.h

   1 /*
   2  * Copyright 2008-2009 Katholieke Universiteit Leuven
   3  *
   4  * Use of this software is governed by the GNU LGPLv2.1 license
   5  *
   6  * Written by Sven Verdoolaege, K.U.Leuven, Departement
   7  * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
   8  */
   9
  10 #ifndef ISL_STREAM_H
  11 #define ISL_STREAM_H
  12
  13 #include <stdio.h>
  14 #include <isl_hash.h>
  15
  16 #if defined(__cplusplus)
  17 extern "C" {
  18 #endif
  19
  20 enum isl_token_type { ISL_TOKEN_ERROR = -1,
  21                         ISL_TOKEN_UNKNOWN = 256, ISL_TOKEN_VALUE,
  22                         ISL_TOKEN_IDENT, ISL_TOKEN_GE,
  23                         ISL_TOKEN_LE, ISL_TOKEN_GT, ISL_TOKEN_LT,
  24                         ISL_TOKEN_TO, ISL_TOKEN_AND,
  25                         ISL_TOKEN_OR, ISL_TOKEN_EXISTS,
  26                         ISL_TOKEN_DEF,
  27                         ISL_TOKEN_LAST };
  28
  29 struct isl_token {
  30         enum isl_token_type  type;
  31
  32         unsigned int on_new_line : 1;
  33         int line;
  34         int col;
  35
  36         union {
  37                 isl_int v;
  38                 char    *s;
  39         } u;
  40 };
  41
  42 void isl_token_free(struct isl_token *tok);
  43
  44 struct isl_stream {
  45         struct isl_ctx  *ctx;
  46         FILE            *file;
  47         const char      *str;
  48         int             line;
  49         int             col;
  50         int             eof;
  51
  52         char            *buffer;
  53         size_t          size;
  54         size_t          len;
  55         int             c;
  56
  57         struct isl_token        *tokens[5];
  58         int             n_token;
  59
  60         struct isl_hash_table   *keywords;
  61         enum isl_token_type      next_type;
  62 };
  63
  64 struct isl_stream* isl_stream_new_file(struct isl_ctx *ctx, FILE *file);
  65 struct isl_stream* isl_stream_new_str(struct isl_ctx *ctx, const char *str);
  66 void isl_stream_free(struct isl_stream *s);
  67
  68 void isl_stream_error(struct isl_stream *s, struct isl_token *tok, char *msg);
  69
  70 struct isl_token *isl_stream_next_token(struct isl_stream *s);
  71 struct isl_token *isl_stream_next_token_on_same_line(struct isl_stream *s);
  72 int isl_stream_next_token_is(struct isl_stream *s, int type);
  73 void isl_stream_push_token(struct isl_stream *s, struct isl_token *tok);
  74 int isl_stream_eat_if_available(struct isl_stream *s, int type);
  75 char *isl_stream_read_ident_if_available(struct isl_stream *s);
  76 int isl_stream_eat(struct isl_stream *s, int type);
  77 int isl_stream_is_empty(struct isl_stream *s);
  78
  79 enum isl_token_type isl_stream_register_keyword(struct isl_stream *s,
  80         const char *name);
  81
  82 #if defined(__cplusplus)
  83 }
  84 #endif
  85
  86 #endif