src/glsl/pp/sl_pp_token_util.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2009 VMware, Inc.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
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  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
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  25  *
  26  **************************************************************************/
  27
  28 #ifndef SL_PP_TOKEN_UTIL_H
  29 #define SL_PP_TOKEN_UTIL_H
  30
  31 struct sl_pp_context;
  32
  33 /*
  34  * A token buffer allows one to get and unget a token
  35  * from a preprocessor context.
  36  */
  37 struct sl_pp_token_buffer {
  38    struct sl_pp_context *context;
  39    unsigned int size;
  40    unsigned int capacity;
  41    struct sl_pp_token_info *tokens;
  42 };
  43
  44 int
  45 sl_pp_token_buffer_init(struct sl_pp_token_buffer *buffer,
  46                         struct sl_pp_context *context);
  47
  48 void
  49 sl_pp_token_buffer_destroy(struct sl_pp_token_buffer *buffer);
  50
  51 int
  52 sl_pp_token_buffer_get(struct sl_pp_token_buffer *buffer,
  53                        struct sl_pp_token_info *out);
  54
  55 void
  56 sl_pp_token_buffer_unget(struct sl_pp_token_buffer *buffer,
  57                          const struct sl_pp_token_info *in);
  58
  59 int
  60 sl_pp_token_buffer_skip_white(struct sl_pp_token_buffer *buffer,
  61                               struct sl_pp_token_info *out);
  62
  63
  64 /*
  65  * A token peek allows one to get a number of tokens from a buffer
  66  * and then either commit the operation or abort it,
  67  * effectively ungetting the peeked tokens.
  68  */
  69 struct sl_pp_token_peek {
  70    struct sl_pp_token_buffer *buffer;
  71    unsigned int size;
  72    unsigned int capacity;
  73    struct sl_pp_token_info *tokens;
  74 };
  75
  76 int
  77 sl_pp_token_peek_init(struct sl_pp_token_peek *peek,
  78                       struct sl_pp_token_buffer *buffer);
  79
  80 void
  81 sl_pp_token_peek_destroy(struct sl_pp_token_peek *peek);
  82
  83 int
  84 sl_pp_token_peek_get(struct sl_pp_token_peek *peek,
  85                      struct sl_pp_token_info *out);
  86
  87 void
  88 sl_pp_token_peek_commit(struct sl_pp_token_peek *peek);
  89
  90 int
  91 sl_pp_token_peek_to_buffer(const struct sl_pp_token_peek *peek,
  92                            struct sl_pp_token_buffer *buffer);
  93
  94 int
  95 sl_pp_token_peek_skip_white(struct sl_pp_token_peek *peek,
  96                             struct sl_pp_token_info *out);
  97
  98 #endif /* SL_PP_TOKEN_UTIL_H */