ast.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4
   5 #include "ast.h"
   6
   7 #define ast_setfunc(me, fn, what) ( *(void**)&((me)->fn) = what )
   8
   9 #define ast_instantiate(T, ctx, destroyfn) \
  10         T *self = (T*)mem_a(sizeof(T)); \
  11         ast_node_init((ast_node*)self, ctx); \
  12         ast_setfunc(&((ast_node*)self)->node, destroy, destroyfn)
  13
  14 /* It must not be possible to get here. */
  15 static void _ast_node_destroy(ast_node *self)
  16 {
  17         fprintf(stderr, "ast node missing destroy()\n");
  18         abort();
  19 }
  20
  21 /* Initialize main ast node aprts */
  22 static void ast_node_init(ast_node *self, lex_ctx_t ctx)
  23 {
  24         self->node.context = ctx;
  25         self->node.destroy = &_ast_node_destroy;
  26 }
  27
  28 /* General expression initialization */
  29 static void ast_expression_init(ast_expression *self,
  30                                 ast_expression_codegen *codegen)
  31 {
  32         ast_setfunc(&self->expression, codegen, codegen);
  33 }
  34
  35 ast_value* ast_value_new(lex_ctx_t ctx, const char *name, qc_type_t t)
  36 {
  37         ast_instantiate(ast_value, ctx, ast_value_delete);
  38         ast_expression_init((ast_expression*)self,
  39                             (ast_expression_codegen*)&ast_value_codegen);
  40
  41         self->name = name ? util_strdup(name) : NULL;
  42         self->vtype = t;
  43         self->next = NULL;
  44 #if 0
  45         self->array = -1;
  46 #endif
  47         VEC_INIT(self, params);
  48         self->has_constval = ifalse;
  49         memset(&self->cvalue, 0, sizeof(self->cvalue));
  50
  51         self->ir_v = NULL;
  52
  53         return self;
  54 }
  55 MEM_VEC_FUNCTIONS(ast_value, ast_value*, params)
  56
  57 void ast_value_delete(ast_value* self)
  58 {
  59         size_t i;
  60         if (self->_name)
  61                 mem_d((void*)self->_name);
  62         for (i = 0; i < self->params_count; ++i)
  63                 ast_delete(self->params[i]);
  64         VEC_CLEAR(self, params);
  65         if (self->next)
  66                 ast_delete(self->next);
  67         if (self->has_constval) {
  68                 switch (self->vtype)
  69                 {
  70                 case qc_string:
  71                         mem_d((void*)self->cvalue.vstring);
  72                         break;
  73                 /* NOTE: delete function? currently collected in
  74                  * the parser structure
  75                  */
  76                 default:
  77                         break;
  78                 }
  79         }
  80         mem_d(self);
  81 }
  82
  83 void ast_value_set_name(ast_value *self, const char *name)
  84 {
  85         if (self->_name)
  86                 mem_d((void*)self->_name);
  87         self->_name = strdup(name);
  88 }
  89
  90 ast_binary* ast_binary_new(filecontext_t ctx, qc_op_t op,
  91                            ast_value* left, ast_value* right)
  92 {
  93         ast_instantiate(ast_binary, ctx, ast_binary_delete);
  94         ast_expression_init((ast_expression*)self, (ast_expression_codegen*)codegen);
  95
  96         self->op = op;
  97         self->left = left;
  98         self->right = right;
  99
 100         return self;
 101 }
 102
 103 void ast_binary_delete(ast_binary *self)
 104 {
 105         mem_d(self);
 106 }
 107
 108 ast_block* ast_block_new(filecontext_t ctx)
 109 {
 110         ast_instantiate(ast_block, ctx, ast_block_delete);
 111         ast_expression_init((ast_expression*)self,
 112                             (ast_expression_codegen*)&ast_block_codegen);
 113
 114         VEC_INIT(self, locals);
 115         VEC_INIT(self, exprs);
 116
 117         return self;
 118 }
 119 MEM_VEC_FUNCTIONS(ast_block, ast_value*, locals)
 120 MEM_VEC_FUNCTIONS(ast_block, ast_expression*, exprs)
 121
 122 void ast_block_delete(ast_block *self)
 123 {
 124         size_t i;
 125         for (i = 0; i < self->locals_count; ++i)
 126                 ast_delete(self->locals[i]);
 127         VEC_CLEAR(self, locals);
 128         for (i = 0; i < self->exprs_count; ++i)
 129                 ast_delete(self->exprs[i]);
 130         VEC_CLEAR(self, exprs);
 131         mem_d(self);
 132 }
 133
 134 ast_function* ast_function_new(filecontext_t ctx, const char *name, ast_value *vtype)
 135 {
 136         ast_instantiate(ast_function, ctx, ast_function_delete);
 137
 138         self->vtype = vtype;
 139         self->_name = name ? strdup(name) : NULL;
 140         VEC_INIT(self, blocks);
 141
 142         return self;
 143 }
 144
 145 MEM_VEC_FUNCTIONS(ast_function, ast_block*, blocks)
 146
 147 void ast_function_delete(ast_function *self)
 148 {
 149         size_t i;
 150         if (self->_name)
 151                 mem_d((void*)self->_name);
 152         if (self->vtype)
 153                 ast_value_delete(self->vtype);
 154         for (i = 0; i < self->blocks_count; ++i)
 155                 ast_delete(self->blocks[i]);
 156         VEC_CLEAR(self, blocks);
 157         mem_d(self);
 158 }