Subversion Repositories Kolibri OS

/*

Kolibri OS port for gcc 5.4

Started by Siemargl @Nov 2016

Contains realization of directory handling functions:

    mkdir()

    closedir()

    opendir()

    readdir()

    rewinddir()

    !!non reentrant

*/

#include 

#include 

#include 

#include 

#include 

#include 

#include "kos32sys1.h"

#include "sys/kos_io.h"

/* defined in newlib headers

int	_EXFUN(mkdir,( const char *_path, mode_t __mode ));

struct dirent {

  char d_namlen;

  char d_name[256];

};

typedef struct

{

//    struct systree_info2 fileinfo;

    struct dirent entry;

//    __u8 bdfeheader[0x20];

//    struct bdfe_item bdfebase;

//    __u8 bdfename[264];

} DIR;

int     closedir(DIR *dirp);

DIR *       opendir(const char *_dirname);

struct dirent * readdir(DIR *_dirp);

void      rewinddir(DIR *_dirp);

*/

static int32_t lastread_block = -1; // non reentrant, must me -1ed in closedir, or will assert

static uint32_t lastread_dir_size;

static DIR  lastread_dir;

DIR *opendir(const char *_dirname)

{

    assert(sizeof(struct fs_dirinfo) == 25);  // check struct aligment

    assert(lastread_block == -1);

    struct fs_dirinfo di;

    struct fs_dirheader dhead;

    memset(&di, 0, sizeof di);

    di.ppath = (char*)_dirname;

    di.retval = (uint32_t)&dhead;

    int rc = sf_file(1, &di);  // read dir size

    if(rc) {

        fprintf(stderr, "Error reading dir size %s\n", _dirname);

        errno = rc;

        return NULL;

    }

    lastread_dir_size = dhead.totl_blocks;

    lastread_dir.entry.d_namlen = strlen(_dirname);

    assert (lastread_dir.entry.d_namlen < sizeof(lastread_dir.entry.d_name));

    strcpy(lastread_dir.entry.d_name, _dirname);

    return &lastread_dir;

};

int closedir(DIR *dirp)

{

    assert (lastread_block != -1);  // was opened

    if (!dirp || lastread_block == -1)

    {

        errno = EBADF;

        return -1;

    }

    lastread_block = -1;

    lastread_dir_size = 0;

    lastread_dir.entry.d_namlen = 0;

    lastread_dir.entry.d_name[0] = '\0';

    return 0;

};

struct dirent* readdir(DIR *dirp)

{

    assert (lastread_block != -1);  // was opened

    if (!dirp || lastread_block == -1)

    {

        errno = EBADF;

        return NULL;

    }

    struct fs_dirinfo di;

    assert (lastread_block != -1);  // was opened

    char retdir[sizeof(struct fs_dirheader) + sizeof(struct fsBDFE)];   // 1 block w/cp866 encoding

    struct fsBDFE *bdfe = (struct fsBDFE *)(retdir + sizeof(struct fs_dirheader));

    memset(&di, 0, sizeof di);

    di.ppath = dirp->entry.d_name;

    di.retval = (uint32_t)retdir;

    di.start = lastread_block;

    di.size = 1;

    int rc = sf_file(1, &di);  // read dir

    if(rc) {

        fprintf(stderr, "Error %d reading dir item %s\n", rc, dirp->entry.d_name);

        errno = rc;

        return NULL;

    }

    static struct dirent ent;

    ent.d_namlen = strlen(bdfe->fname);

    assert (ent.d_namlen < sizeof(ent.d_name));

    strcpy(ent.d_name, bdfe->fname);

    lastread_block++;

    return &ent;

};

void rewinddir(DIR *dirp)

{

    if (!dirp || lastread_block == -1)

    {

        return;

    }

    lastread_block = 0;

}

int	mkdir(const char *_path, mode_t m)

{

    char   namebuffer[1050]; // need for save data after di!!!

    struct fs_dirinfo *di = (struct fs_dirinfo *)namebuffer;

//debug_board_printf("mkdir start (%s)\n", _path);

    memset(di, 0, sizeof(struct fs_dirinfo));

    //di.ppath = (char*)_path;  // dont work with 70.9

    strcpy(di->path, _path);

    int rc = sf_file(9, di);  // creat dir

    if(rc) {

        fprintf(stderr, "Error %d creating dir item %s\n", rc, _path);

        errno = rc;

        return -1;

    }

//debug_board_printf("mkdir end (%s)\n", _path);

    return 0;

}

////////////////////////////////////////////////////////////////////////////////////////

void __attribute__ ((noinline)) debug_board_write_str(const char* str){

  while(*str)

    debug_board_write_byte(*str++);

}

void __attribute__ ((noinline)) debug_board_printf(const char *format,...)

{

        va_list ap;

        char log_board[300];

        va_start (ap, format);

        vsnprintf(log_board, sizeof log_board, format, ap);

        va_end(ap);

        debug_board_write_str(log_board);

}

__attribute__ ((noinline)) void trap(int n)

{

    // nothing todo, just see n in debugger. use "bp trap" command

    __asm__ __volatile__(

    "nop"

    :

    :"a"(n));

}

/* tested example

void* read_folderdata(char* name)

{

    struct fs_dirinfo di;

    struct fs_dirheader dhead;

    assert(sizeof di == 25);

    memset(&di, 0, sizeof di);

    di.ppath = name;

    di.retval = (uint32_t)&dhead;

    int rc = sf_file(1, &di);  // read dir size

    if(rc) {

        debug_board_printf("Error reading dir size %s", name);

        exit(1);

    }

    di.size = dhead.totl_blocks;

    char *retdir = malloc(sizeof dhead + dhead.totl_blocks * sizeof(struct fsBDFE));

    if(!retdir) {

        debug_board_printf("No memory for dir %s", name);

        exit(1);

    }

    di.retval = (uint32_t)retdir;

    rc = sf_file(1, &di);  // read dir

    if(rc) {

        debug_board_printf("Error 2 reading dir size %s", name);

        exit(1);

    }

    // manual clear mark flag (random junk in fname free space)

    int i;

    for (i = 0; i < dhead.totl_blocks; i++)

        ((struct fsBDFE*)(retdir+32))[i].fname[259] = 0;

    debug_board_printf("Loaded dir [%s] etnries %d,\n first file [%s]\n", name, ((struct fs_dirheader*)(retdir))->curn_blocks, ((struct fsBDFE*)(retdir+32))->fname);

    return retdir;

}

*/

// while not in newlib

int set_fileinfo(const char *path, fileinfo_t *info)

{

    int retval;

    __asm__ __volatile__ (

    "pushl $0 \n\t"

    "pushl $0 \n\t"

    "movl %1, 1(%%esp) \n\t"

    "pushl %%ebx \n\t"

    "pushl $0 \n\t"

    "pushl $0 \n\t"

    "pushl $0 \n\t"

    "pushl $6 \n\t"

    "movl %%esp, %%ebx \n\t"

    "movl $70, %%eax \n\t"

    "int $0x40 \n\t"

    "addl $28, %%esp \n\t"

    :"=a" (retval)

    :"r" (path), "b" (info));

   return retval;

};