90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*
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* $Id: bytecode.c,v 1.3 2005-07-07 16:52:48 bacon Exp $
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*/
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#include <xp/stx/bytecode.h>
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#include <xp/stx/class.h>
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#include <xp/stx/method.h>
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#include <xp/stx/hash.h>
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static void __decode1 (xp_stx_t* stx, xp_word_t idx, void* data);
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static int __decode2 (xp_stx_t* stx,
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xp_stx_class_t* class_obj, xp_stx_method_t* method_obj);
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int xp_stx_decode (xp_stx_t* stx, xp_word_t class)
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{
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xp_stx_class_t* class_obj;
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class_obj = (xp_stx_class_t*)XP_STX_OBJECT(stx, class);
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if (class_obj->methods == stx->nil) return 0;
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/* TODO */
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xp_stx_hash_traverse (stx, class_obj->methods, __decode1, class_obj);
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return 0;
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}
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static void __decode1 (xp_stx_t* stx, xp_word_t idx, void* data)
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{
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xp_stx_method_t* method_obj;
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xp_word_t key = XP_STX_WORDAT(stx,idx,XP_STX_PAIRLINK_KEY);
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xp_word_t value = XP_STX_WORDAT(stx,idx,XP_STX_PAIRLINK_VALUE);
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xp_printf (XP_TEXT("Method: %s\n"), XP_STX_DATA(stx, key));
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method_obj = (xp_stx_method_t*)XP_STX_OBJECT(stx, value);
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__decode2 (stx, data, method_obj);
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}
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static const xp_char_t* opcode_names[] =
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{
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XP_TEXT("PUSH_VARIABLE"),
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XP_TEXT("PUSH_TEMPORARY"),
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XP_TEXT("PUSH_LITERAL_CONSTANT"),
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XP_TEXT("PUSH_LITERAL_VARIABLE"),
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XP_TEXT("STORE_VARIABLE"),
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XP_TEXT("STORE_TEMPORARY"),
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XP_TEXT("DO_SPECIAL"),
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XP_TEXT("DO_PRIMITIVE"),
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XP_TEXT("UNKNOWN"),
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XP_TEXT("UNKNOWN"),
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XP_TEXT("PUSH_VARIABLE_EXTENDED"),
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XP_TEXT("PUSH_TEMPORARY_EXTENDED"),
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XP_TEXT("STORE_TEMPORARY_EXTENDED"),
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XP_TEXT("UNKNOWN"),
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XP_TEXT("UNKNOWN"),
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XP_TEXT("DO_PRIMITIVE_EXTENDED")
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};
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static int __decode2 (xp_stx_t* stx,
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xp_stx_class_t* class_obj, xp_stx_method_t* method_obj)
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{
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xp_stx_byte_object_t* bytecodes;
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xp_word_t bytecode_size, pc = 0;
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xp_byte_t code;
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int opcode, operand;
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bytecodes = XP_STX_BYTE_OBJECT(stx, method_obj->bytecodes);
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bytecode_size = XP_STX_SIZE(stx, method_obj->bytecodes);
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while (pc < bytecode_size) {
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code = bytecodes->data[pc++];
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opcode = (code & 0xF0) >> 4;
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operand = code & 0x0F;
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if (opcode > 0x9) {
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if (pc >= bytecode_size) {
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/* TODO: */
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xp_printf (XP_TEXT("error in bytecodes\n"));
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return -1;
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}
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code = bytecodes->data[pc++];
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operand |= (code << 4);
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}
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xp_printf (XP_TEXT("%s(0x%x), operand = %d\n"),
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opcode_names[opcode], opcode, operand);
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}
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return 0;
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}
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