ps1.c

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <kernel.h>
#include <sifcmd.h>
#include <libmc.h>

#include "main.h"
#include "ps1.h"
#include "OSDInit.h"

struct PS1DRV
{
    char ver[32];
    int major;
    int minor;
    int region;
};

static struct PS1DRV ps1drv = {"", 0, 0, 0};
static char ps1ver_uni[]    = "rom0:PS1VER?";

int PS1DRVInit(void)
{
    const char *pChar;
    int fd, result;

    ps1drv.ver[0] = '\0';

    fd            = _ps2sdk_open("rom0:PS1ID", O_RDONLY);

    if (fd < 0)
        return -1;

    _ps2sdk_read(fd, ps1drv.ver, sizeof(ps1drv.ver));
    _ps2sdk_close(fd);

    pChar        = ps1drv.ver;
    ps1drv.major = atoi(pChar);

    for (pChar = ps1drv.ver; *pChar >= '0' && *pChar <= '9'; pChar++)
    {
    };

    if (*pChar == '.')
    {
        ps1drv.minor = atoi(pChar + 1);

        for (; *pChar >= '0' && *pChar <= '9'; pChar++)
        {
        };

        result        = 0;
        ps1drv.region = *pChar;
    }
    else
    { //Missing dot
        ps1drv.region = 0;
        ps1drv.major  = 0;
        ps1drv.minor  = 0;
        result        = -1;
    }

    if (result == 0)
    {
        if (OSDGetPS1DRVRegion(&ps1ver_uni[11]) == 0 || (fd = _ps2sdk_open(ps1ver_uni, O_RDONLY)) < 0)
            fd = _ps2sdk_open("rom0:PS1VER", O_RDONLY);

        if (fd >= 0)
        {
            result = _ps2sdk_read(fd, ps1drv.ver, sizeof(ps1drv.ver) - 1);
            _ps2sdk_close(fd);

            //NULL-terminate, only if non-error
            ps1drv.ver[result >= 0 ? result : 0] = '\0';
        }
    }

    //The original always returned -1. But we'll return something more meaningful.
    return result;
}

const char *PS1DRVGetVersion(void)
{
    if (ps1drv.ver[0] == '\0')
    { //rom0:PS1VER is missing (not present in the earliest ROMs)
        return (OSDGetConsoleRegion() == CONSOLE_REGION_JAPAN ? "1.01" : "1.10");
    }

    return ps1drv.ver;
}