#ifndef VBUAPI
#define VBUAPI
#endif
#include <stdio.h>
#include <string.h>
#include <vbu.h>

/* Memory management */
#ifndef VBU_REALLOC
    #include <stdlib.h>
    #define VBU_REALLOC realloc
#else
    extern void* VBU_REALLOC(void *, size_t);
#endif



/***************************** Library Functions *****************************/

/* Sign-extend an integer of variable width */
static int32_t SignExtend(int32_t value, int32_t bits) {
    #ifndef VB_SIGNED_PROPAGATE
        value &= ~((uint32_t) 0xFFFFFFFF << bits);
        bits   = (int32_t) 1 << (bits - (int32_t) 1);
        return (value ^ bits) - bits;
    #else
        return value << (32 - bits) >> (32 - bits);
    #endif
}



/******************************** Sub-Modules ********************************/

#include "disassembler.c"



/******************************* API Commands ********************************/

/* Determine the size in bytes of an instruction */
VBUAPI int vbuCodeSize(VB *sim, uint32_t address) {
    int opcode = vbRead(sim, address, VB_U16) >> 10 & 63;
    return opcode < 0x20 || opcode == 0x32 || opcode == 0x36 ? 2 : 4;
}

/* Initialize disassembler options with default settings */
VBUAPI VBU_DasmConfig* vbuDasmInit(VBU_DasmConfig *config) {
    config->bcondNotation     = VBU_JOINED;
    config->conditionCase     = VBU_LOWER;
    config->conditionCL       = VBU_L;
    config->conditionEZ       = VBU_Z;
    config->conditionNotation = VBU_NAMES;
    config->hexCase           = VBU_UPPER;
    config->hexNotation       = VBU_0X;
    config->immediateNotation = VBU_NONE;
    config->memoryNotation    = VBU_OUTSIDE;
    config->mnemonicCase      = VBU_UPPER;
    config->operandOrder      = VBU_DEST_LAST;
    config->programCase       = VBU_LOWER;
    config->programNotation   = VBU_NAMES;
    config->setfNotation      = VBU_SPLIT;
    config->systemCase        = VBU_LOWER;
    config->systemNotation    = VBU_NAMES;
    return config;
}

/* Disassemble from a simulation */
VBUAPI VBU_DasmLine* vbuDisassemble(VB *sim, uint32_t address,
    VBU_DasmConfig *config, unsigned length, int line) {
    return dasmDisassemble(sim, address, config, length, line);
}