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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  26  **************************************************************************/
  27
  28 #ifndef SL_PP_TOKEN_UTIL_H
  29 #define SL_PP_TOKEN_UTIL_H
  30
  31 #include <assert.h>
  32 #include <stdlib.h>
  33 #include "sl_pp_token.h"
  34
  35
  36 struct sl_pp_context;
  37
  38 /*
  39  * A token buffer allows one to get and unget a token
  40  * from a preprocessor context.
  41  */
  42 struct sl_pp_token_buffer {
  43    struct sl_pp_context *context;
  44    unsigned int size;
  45    unsigned int capacity;
  46    struct sl_pp_token_info *tokens;
  47 };
  48
  49 int
  50 sl_pp_token_buffer_init(struct sl_pp_token_buffer *buffer,
  51                         struct sl_pp_context *context);
  52
  53 void
  54 sl_pp_token_buffer_destroy(struct sl_pp_token_buffer *buffer);
  55
  56 int
  57 sl_pp_token_buffer_get(struct sl_pp_token_buffer *buffer,
  58                        struct sl_pp_token_info *out);
  59
  60 void
  61 sl_pp_token_buffer_unget(struct sl_pp_token_buffer *buffer,
  62                          const struct sl_pp_token_info *in);
  63
  64 int
  65 sl_pp_token_buffer_skip_white(struct sl_pp_token_buffer *buffer,
  66                               struct sl_pp_token_info *out);
  67
  68
  69 /*
  70  * A token peek allows one to get a number of tokens from a buffer
  71  * and then either commit the operation or abort it,
  72  * effectively ungetting the peeked tokens.
  73  */
  74 struct sl_pp_token_peek {
  75    struct sl_pp_token_buffer *buffer;
  76    unsigned int size;
  77    unsigned int capacity;
  78    struct sl_pp_token_info *tokens;
  79 };
  80
  81 int
  82 sl_pp_token_peek_init(struct sl_pp_token_peek *peek,
  83                       struct sl_pp_token_buffer *buffer);
  84
  85 void
  86 sl_pp_token_peek_destroy(struct sl_pp_token_peek *peek);
  87
  88 int
  89 sl_pp_token_peek_get(struct sl_pp_token_peek *peek,
  90                      struct sl_pp_token_info *out);
  91
  92 void
  93 sl_pp_token_peek_commit(struct sl_pp_token_peek *peek);
  94
  95 int
  96 sl_pp_token_peek_to_buffer(const struct sl_pp_token_peek *peek,
  97                            struct sl_pp_token_buffer *buffer);
  98
  99 int
 100 sl_pp_token_peek_skip_white(struct sl_pp_token_peek *peek,
 101                             struct sl_pp_token_info *out);
 102
 103 #endif /* SL_PP_TOKEN_UTIL_H */