astir.h

   1 /*
   2  * Copyright (C) 2012
   3  *     Wolfgang Bumiller
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a copy of
   6  * this software and associated documentation files (the "Software"), to deal in
   7  * the Software without restriction, including without limitation the rights to
   8  * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is furnished to do
  10  * so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be included in all
  13  * copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  */
  23 #ifndef GMQCC_ASTIR_HDR
  24 #define GMQCC_ASTIR_HDR
  25
  26 #define MEM_VECTOR_PROTO(Towner, Tmem, mem)                   \
  27     bool GMQCC_WARN Towner##_##mem##_add(Towner*, Tmem);      \
  28     bool GMQCC_WARN Towner##_##mem##_remove(Towner*, size_t);
  29
  30 #define MEM_VECTOR_PROTO_ALL(Towner, Tmem, mem)                    \
  31     MEM_VECTOR_PROTO(Towner, Tmem, mem)                            \
  32     bool GMQCC_WARN Towner##_##mem##_find(Towner*, Tmem, size_t*); \
  33     void Towner##_##mem##_clear(Towner*);
  34
  35 #define MEM_VECTOR_MAKE(Twhat, name) \
  36     Twhat  *name;                    \
  37     size_t name##_count;             \
  38     size_t name##_alloc
  39
  40 #define _MEM_VEC_FUN_ADD(Tself, Twhat, mem)                          \
  41 bool GMQCC_WARN Tself##_##mem##_add(Tself *self, Twhat f)            \
  42 {                                                                    \
  43     Twhat *reall;                                                    \
  44     if (self->mem##_count == self->mem##_alloc) {                    \
  45         if (!self->mem##_alloc) {                                    \
  46             self->mem##_alloc = 16;                                  \
  47         } else {                                                     \
  48             self->mem##_alloc *= 2;                                  \
  49         }                                                            \
  50         reall = (Twhat*)mem_a(sizeof(Twhat) * self->mem##_alloc);    \
  51         if (!reall) {                                                \
  52             return false;                                            \
  53         }                                                            \
  54         memcpy(reall, self->mem, sizeof(Twhat) * self->mem##_count); \
  55         mem_d(self->mem);                                            \
  56         self->mem = reall;                                           \
  57     }                                                                \
  58     self->mem[self->mem##_count++] = f;                              \
  59     return true;                                                     \
  60 }
  61
  62 #define _MEM_VEC_FUN_REMOVE(Tself, Twhat, mem)                       \
  63 bool GMQCC_WARN Tself##_##mem##_remove(Tself *self, size_t idx)      \
  64 {                                                                    \
  65     size_t i;                                                        \
  66     Twhat *reall;                                                    \
  67     if (idx >= self->mem##_count) {                                  \
  68         return true; /* huh... */                                    \
  69     }                                                                \
  70     for (i = idx; i < self->mem##_count-1; ++i) {                    \
  71         self->mem[i] = self->mem[i+1];                               \
  72     }                                                                \
  73     self->mem##_count--;                                             \
  74     if (self->mem##_count < self->mem##_count/2)                     \
  75     {                                                                \
  76         self->mem##_alloc /= 2;                                      \
  77         reall = (Twhat*)mem_a(sizeof(Twhat) * self->mem##_count);    \
  78         if (!reall) {                                                \
  79             return false;                                            \
  80         }                                                            \
  81         memcpy(reall, self->mem, sizeof(Twhat) * self->mem##_count); \
  82         mem_d(self->mem);                                            \
  83         self->mem = reall;                                           \
  84     }                                                                \
  85     return true;                                                     \
  86 }
  87
  88 #define _MEM_VEC_FUN_FIND(Tself, Twhat, mem)                    \
  89 bool GMQCC_WARN Tself##_##mem##_find(Tself *self, Twhat obj, size_t *idx) \
  90 {                                                               \
  91     size_t i;                                                   \
  92     for (i = 0; i < self->mem##_count; ++i) {                   \
  93         if (self->mem[i] == obj) {                              \
  94             if (idx) {                                          \
  95                 *idx = i;                                       \
  96             }                                                   \
  97             return true;                                        \
  98         }                                                       \
  99     }                                                           \
 100     return false;                                               \
 101 }
 102
 103 #define _MEM_VEC_FUN_CLEAR(Tself, mem)  \
 104 void Tself##_##mem##_clear(Tself *self) \
 105 {                                       \
 106     if (!self->mem)                     \
 107         return;                         \
 108     free((void*) self->mem);            \
 109     self->mem = NULL;                   \
 110     self->mem##_count = 0;              \
 111     self->mem##_alloc = 0;              \
 112 }
 113
 114 #define MEM_VECTOR_CLEAR(owner, mem) \
 115     if ((owner)->mem)                \
 116         free((void*)((owner)->mem)); \
 117     (owner)->mem = NULL;             \
 118     (owner)->mem##_count = 0;        \
 119     (owner)->mem##_alloc = 0
 120
 121 #define MEM_VECTOR_INIT(owner, mem) \
 122 {                                   \
 123     (owner)->mem = NULL;            \
 124     (owner)->mem##_count = 0;       \
 125     (owner)->mem##_alloc = 0;       \
 126 }
 127
 128 #define MEM_VEC_FUNCTIONS(Tself, Twhat, mem) \
 129 _MEM_VEC_FUN_REMOVE(Tself, Twhat, mem)       \
 130 _MEM_VEC_FUN_ADD(Tself, Twhat, mem)
 131
 132 #define MEM_VEC_FUNCTIONS_ALL(Tself, Twhat, mem) \
 133 MEM_VEC_FUNCTIONS(Tself, Twhat, mem)             \
 134 _MEM_VEC_FUN_CLEAR(Tself, mem)                   \
 135 _MEM_VEC_FUN_FIND(Tself, Twhat, mem)
 136
 137 enum store_types {
 138     store_global,
 139     store_local,  /* local, assignable for now, should get promoted later */
 140     store_value,  /* unassignable */
 141 };
 142
 143 typedef struct {
 144     float x, y, z;
 145 } vector_t;
 146
 147 /* A shallow copy of a lex_file to remember where which ast node
 148  * came from.
 149  */
 150 typedef struct lex_ctx
 151 {
 152     const char *file;
 153     size_t     line;
 154 } lex_ctx_t;
 155
 156 #endif