#ifndef AS_DCPU16_H_PTFNJB09
#define AS_DCPU16_H_PTFNJB09

#include "dcpu16.h"

struct instruction_ {
    char *label;  /* set if a label points here */
    char *opcode; /* tokenized instruction text */
    struct operand_ *operands;  /* list of operands */
    unsigned int length; /* words */
    unsigned int ready : 1; /* bytecode computed? */
    DCPU16_WORD instr_words[];
};


enum operand_types_{
    OT_DIRECT,  /* these operands simply render their contents into bytecode */
    OT_NEXT,    /* these operands increase instruction length */
    OT_LABEL    /* labels need to be computed then converted to other types */
};

struct operand_ {
    struct operand_ *next;
    char *operand; /* tokenized operand text */
    enum operand_types_ type;
    union {
        DCPU16_WORD word_value;
        struct instruction_ *label_destination;
    } value;
};


#define IL_SIZE(entries) (((entries) * sizeof(struct instruction_ *)) + sizeof(struct instruction_list_))

struct instruction_list_ {
    size_t allocated;
    size_t entries;
    struct instruction_ *instr[];
};


/* note label table holds its own structs, not pointers */
struct label_ {
    char *label; /* name of label */
    struct instruction_ *instr;
};

#define LL_SIZE(entries) (((entries) * sizeof(struct label_ *)) + sizeof(struct label_list_))

struct label_list_ {
    size_t allocated;
    size_t entries;
    struct label_ label[];
};

#endif /* AS_DCPU16_H_PTFNJB09 */