code gen init

Makefile

@@ -1,4 +1,4 @@
 comp:
 	lex src/lex.l
 	yacc -d src/grammar.y
-	gcc -o bin/main y.tab.c lex.yy.c src/create.c src/interpreter.c src/compiler.c main/main.c
+	gcc -o bin/main y.tab.c lex.yy.c src/create.c src/interpreter.c src/compiler.c src/codegen.c main/main.c

src/codegen.c

@@ -0,0 +1,123 @@
+#include "summoner.h"
+#include <stdlib.h>
+
+typedef struct {
+    int label_address;
+} LabelTable;
+
+typedef struct {
+    int         size;
+    int         alloc_size;
+    SVM_Byte    *code;
+    int         label_table_size;
+    int         label_table_alloc_size;
+    LabelTable  *label_table;
+    int         line_number_size;
+    SVM_LineNumber      *line_number;
+} OpcodeBuf;
+
+static SVM_Executable *
+alloc_executable()
+{
+    SVM_Executable      *exe;
+
+    exe = malloc(sizeof(SVM_Executable));
+
+    exe->constant_pool_count = 0;
+    exe->constant_pool = NULL;
+    exe->global_variable_count = 0;
+    exe->global_variable = NULL;
+    exe->constant_count = 0;
+    exe->constant_definition = NULL;
+    exe->type_specifier_count = 0;
+    exe->type_specifier = NULL;
+
+    return exe;
+}
+
+static void
+init_opcode_buf(OpcodeBuf *ob)
+{
+    ob->size = 0;
+    ob->alloc_size = 0;
+    ob->code = NULL;
+    ob->label_table_size = 0;
+    ob->label_table_alloc_size = 0;
+    ob->label_table = NULL;
+    ob->line_number_size = 0;
+    ob->line_number = NULL;
+}
+
+static void
+add_global_variable(Compiler *compiler, SVM_Executable *exe)
+{
+}
+
+static void
+add_functions(Compiler *compiler, SVM_Executable *exe)
+{
+}
+
+// TODO: huge swith-case
+static void
+generate_statement_list(SVM_Executable *exe, Block *current_block,
+                        StatementList *statement_list,
+                        OpcodeBuf *ob)
+{
+}
+
+static void
+fix_labels(OpcodeBuf *ob)
+{
+} 
+
+static SVM_Byte *
+fix_opcode_buf(OpcodeBuf *ob)
+{
+    SVM_Byte *ret;
+
+    fix_labels(ob);
+    ret = realloc(ob->code, ob->size);
+    free(ob->label_table);
+
+    return ret;
+}
+
+
+static void
+add_top_level(Compiler *compiler, SVM_Executable *exe)
+{
+    OpcodeBuf           ob;
+
+    init_opcode_buf(&ob);
+    generate_statement_list(exe, NULL, compiler->statement_list,
+                            &ob);
+
+    exe->top_level.code_size = ob.size;
+    exe->top_level.code = fix_opcode_buf(&ob);
+    exe->top_level.line_number_size = ob.line_number_size;
+    exe->top_level.line_number = ob.line_number;
+}
+static void
+generate_constant_initializer(Compiler *compiler, SVM_Executable *exe)
+{
+}
+
+SVM_Executable *
+smc_code_gen(Compiler *compiler)
+{
+    SVM_Executable      *exe;
+
+    exe = alloc_executable();
+
+    exe->constant_count = compiler->svm_constant_count;
+    exe->constant_definition = compiler->svm_constant;
+
+    add_global_variable(compiler, exe);
+    add_functions(compiler, exe);
+    add_top_level(compiler, exe);
+
+    generate_constant_initializer(compiler, exe);
+
+    return exe;
+}

src/summoner.h

@@ -2,6 +2,7 @@
 #define _SUMMONER_H_
 
 #include <stdbool.h>
+#include <wchar.h>
 
 typedef enum
 {
@@ -170,12 +171,77 @@ Block *alloc_block(StatementList *list);
 
 TypeSpecifier *alloc_type_specifier(BasicType type, char *identifier);
 
+typedef wchar_t SVM_Char;
+typedef unsigned char SVM_Byte;
+
+typedef enum {
+    SVM_FALSE = 0,
+    SVM_TRUE = 1
+} SVM_Boolean;
+
+typedef struct {
+    TypeSpecifier *type;
+    char        *package_name;
+    char        *name;
+    SVM_Boolean is_defined;
+} SVM_Constant;
+
+typedef enum {
+    SVM_CONSTANT_INT,
+    SVM_CONSTANT_DOUBLE,
+    SVM_CONSTANT_STRING
+} SVM_ConstantPoolTag;
+
+typedef struct {
+    SVM_ConstantPoolTag tag;
+    union {
+        int     c_int;
+        double  c_double;
+        SVM_Char *c_string;
+    } u;
+} SVM_ConstantPool;
+
+typedef struct {
+    char                *name;
+    TypeSpecifier   *type;
+} SVM_Variable;
+
+typedef struct {
+    int line_number;
+    int start_pc;
+    int pc_count;
+} SVM_LineNumber;
+
+typedef struct {
+    int                 code_size;
+    SVM_Byte            *code;
+    int                 line_number_size;
+    SVM_LineNumber      *line_number;
+} SVM_CodeBlock;
+
 typedef struct Compiler
 {
-    Block *current_block;
+    int                 svm_constant_count;
+    SVM_Constant        *svm_constant;
+    StatementList       *statement_list;
+    Block               *current_block;
 } Compiler;
 
 Compiler *get_current_compiler();
 void set_current_compiler(Compiler *compiler);
 
+typedef struct SVM_Executable {
+    int                 constant_pool_count;
+    SVM_ConstantPool    *constant_pool;
+    int                 global_variable_count;
+    SVM_Variable        *global_variable;
+    //int               *function_count;
+    //SVM_Function      *function;
+    int                 type_specifier_count;
+    TypeSpecifier       *type_specifier;
+    int                 constant_count;
+    SVM_Constant        *constant_definition;
+    SVM_CodeBlock       top_level;
+} SVM_Executable;
+
 #endif