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



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

/* Memory manager */
#ifdef VBU_MEMMGR
extern void* VBU_MEMMGR(void *ptr, size_t size);
#else
#include <stdlib.h>
static void* VBU_MEMMGR(void *ptr, size_t size) {

    /* Free a buffer */
    if (size == 0) {
        if (ptr != NULL)
            free(ptr);
        return NULL;
    }

    /* Create or resize a buffer */
    return realloc(ptr, size);
}
#endif



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

#include "disassembler.c"
#include "isx.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* vbuDasmDefaults(VBU_DasmConfig *config) {

    /* Error checking */
    if (config == NULL)
        return NULL;

    /* Supply default configuration */
    config->bcondNotation     = VBU_JOINED;
    config->branchNotation    = VBU_ABSOLUTE;
    config->conditionCase     = VBU_LOWER;
    config->conditionCL       = VBU_L;
    config->conditionEZ       = VBU_Z;
    config->conditionNotation = VBU_NAMES;
    config->hexCase           = VBU_UPPER;
    config->hexNotation       = VBU_PREFIX_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) {
    VBU_DasmConfig defs; /* Default settings */

    /* Error checking */
    if (sim == NULL || length == 0)
        return NULL;

    /* Supply default configuration */
    if (config == NULL)
        config = vbuDasmDefaults(&defs);

    /* Disassemble instructions */
    return dasmDisassemble(sim, address, config, length, line);
}

/* Decode an ISX debugger file to a Virtual Boy ROM */
VBUAPI void* vbuFromISX(void *bytes, size_t length, size_t *romLength) {
    return isxFrom(bytes, length, romLength);
}