/******************************************************************************
Put one pixel (Pixel) into GIF file.
******************************************************************************/
int
EGifPutPixel(GifFileType *GifFile, GifPixelType Pixel)
{
GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private;
if (!IS_WRITEABLE(Private)) {
/* This file was NOT open for writing: */
GifFile->Error = E_GIF_ERR_NOT_WRITEABLE;
return GIF_ERROR;
}
if (Private->PixelCount == 0) {
GifFile->Error = E_GIF_ERR_DATA_TOO_BIG;
return GIF_ERROR;
}
--Private->PixelCount;
/* Make sure the code is not out of bit range, as we might generate
* wrong code (because of overflow when we combine them) in this case: */
Pixel &= CodeMask[Private->BitsPerPixel];
return EGifCompressLine(GifFile, &Pixel, 1);
}
/******************************************************************************
This routine should be called before any attempt to dump an image - any
call to any of the pixel dump routines.
******************************************************************************/
int
EGifPutImageDesc(GifFileType *GifFile,
const int Left,
const int Top,
const int Width,
const int Height,
const bool Interlace,
const ColorMapObject *ColorMap)
{
GifByteType Buf[3];
GifFilePrivateType *Private = (GifFilePrivateType *)GifFile->Private;
if (Private->FileState & FILE_STATE_IMAGE &&
Private->PixelCount > 0xffff0000UL) {
/* If already has active image descriptor - something is wrong! */
GifFile->Error = E_GIF_ERR_HAS_IMAG_DSCR;
return GIF_ERROR;
}
if (!IS_WRITEABLE(Private)) {
/* This file was NOT open for writing: */
GifFile->Error = E_GIF_ERR_NOT_WRITEABLE;
return GIF_ERROR;
}
GifFile->Image.Left = Left;
GifFile->Image.Top = Top;
GifFile->Image.Width = Width;
GifFile->Image.Height = Height;
GifFile->Image.Interlace = Interlace;
if (ColorMap) {
if (GifFile->Image.ColorMap != NULL) {
GifFreeMapObject(GifFile->Image.ColorMap);
GifFile->Image.ColorMap = NULL;
}
GifFile->Image.ColorMap = GifMakeMapObject(ColorMap->ColorCount,
ColorMap->Colors);
if (GifFile->Image.ColorMap == NULL) {
GifFile->Error = E_GIF_ERR_NOT_ENOUGH_MEM;
return GIF_ERROR;
}
} else {
GifFile->Image.ColorMap = NULL;
}
/* Put the image descriptor into the file: */
Buf[0] = DESCRIPTOR_INTRODUCER; /* Image separator character. */
InternalWrite(GifFile, Buf, 1);
(void)EGifPutWord(Left, GifFile);
(void)EGifPutWord(Top, GifFile);
(void)EGifPutWord(Width, GifFile);
(void)EGifPutWord(Height, GifFile);
Buf[0] = (ColorMap ? 0x80 : 0x00) |
(Interlace ? 0x40 : 0x00) |
(ColorMap ? ColorMap->BitsPerPixel - 1 : 0);
InternalWrite(GifFile, Buf, 1);
/* If we have Global color map - dump it also: */
if (ColorMap != NULL) {
int i;
for (i = 0; i < ColorMap->ColorCount; i++) {
/* Put the ColorMap out also: */
Buf[0] = ColorMap->Colors[i].Red;
Buf[1] = ColorMap->Colors[i].Green;
Buf[2] = ColorMap->Colors[i].Blue;
if (InternalWrite(GifFile, Buf, 3) != 3) {
GifFile->Error = E_GIF_ERR_WRITE_FAILED;
return GIF_ERROR;
}
}
}
if (GifFile->SColorMap == NULL && GifFile->Image.ColorMap == NULL) {
GifFile->Error = E_GIF_ERR_NO_COLOR_MAP;
return GIF_ERROR;
}
/* Mark this file as has screen descriptor: */
Private->FileState |= FILE_STATE_IMAGE;
Private->PixelCount = (long)Width *(long)Height;
/* Reset compress algorithm parameters. */
(void)EGifSetupCompress(GifFile);
return GIF_OK;
}
/******************************************************************************
This routine should be called before any other EGif calls, immediately
following the GIF file opening.
******************************************************************************/
int
EGifPutScreenDesc(GifFileType *GifFile,
const int Width,
const int Height,
const int ColorRes,
const int BackGround,
const ColorMapObject *ColorMap)
{
GifByteType Buf[3];
GifFilePrivateType *Private = (GifFilePrivateType *) GifFile->Private;
const char *write_version;
if (Private->FileState & FILE_STATE_SCREEN) {
/* If already has screen descriptor - something is wrong! */
GifFile->Error = E_GIF_ERR_HAS_SCRN_DSCR;
return GIF_ERROR;
}
if (!IS_WRITEABLE(Private)) {
/* This file was NOT open for writing: */
GifFile->Error = E_GIF_ERR_NOT_WRITEABLE;
return GIF_ERROR;
}
write_version = EGifGetGifVersion(GifFile);
/* First write the version prefix into the file. */
if ((unsigned int)InternalWrite(GifFile, (unsigned char *)write_version,
strlen(write_version)) != strlen(write_version)) {
GifFile->Error = E_GIF_ERR_WRITE_FAILED;
return GIF_ERROR;
}
GifFile->SWidth = Width;
GifFile->SHeight = Height;
GifFile->SColorResolution = ColorRes;
GifFile->SBackGroundColor = BackGround;
if (ColorMap) {
GifFile->SColorMap = GifMakeMapObject(ColorMap->ColorCount,
ColorMap->Colors);
if (GifFile->SColorMap == NULL) {
GifFile->Error = E_GIF_ERR_NOT_ENOUGH_MEM;
return GIF_ERROR;
}
} else
GifFile->SColorMap = NULL;
/*
* Put the logical screen descriptor into the file:
*/
/* Logical Screen Descriptor: Dimensions */
(void)EGifPutWord(Width, GifFile);
(void)EGifPutWord(Height, GifFile);
/* Logical Screen Descriptor: Packed Fields */
/* Note: We have actual size of the color table default to the largest
* possible size (7+1 == 8 bits) because the decoder can use it to decide
* how to display the files.
*/
Buf[0] = (ColorMap ? 0x80 : 0x00) | /* Yes/no global colormap */
((ColorRes - 1) << 4) | /* Bits allocated to each primary color */
(ColorMap ? ColorMap->BitsPerPixel - 1 : 0x07 ); /* Actual size of the
color table. */
if (ColorMap != NULL && ColorMap->SortFlag)
Buf[0] |= 0x08;
Buf[1] = BackGround; /* Index into the ColorTable for background color */
Buf[2] = GifFile->AspectByte; /* Pixel Aspect Ratio */
InternalWrite(GifFile, Buf, 3);
/* If we have Global color map - dump it also: */
if (ColorMap != NULL) {
int i;
for (i = 0; i < ColorMap->ColorCount; i++) {
/* Put the ColorMap out also: */
Buf[0] = ColorMap->Colors[i].Red;
Buf[1] = ColorMap->Colors[i].Green;
Buf[2] = ColorMap->Colors[i].Blue;
if (InternalWrite(GifFile, Buf, 3) != 3) {
GifFile->Error = E_GIF_ERR_WRITE_FAILED;
return GIF_ERROR;
}
}
}
/* Mark this file as has screen descriptor, and no pixel written yet: */
Private->FileState |= FILE_STATE_SCREEN;
return GIF_OK;
}
// make a node (regular files only at this time)
int fs_entry_mknod( struct fs_core* core, char const* path, mode_t mode, dev_t dev, uint64_t user, uint64_t vol ) {
// only regular files at this time...
if( ! ( S_ISREG( mode ) || S_ISFIFO( mode ) ) ) {
return -ENOTSUP;
}
// revalidate this path
int rc = fs_entry_revalidate_path( core, path );
if( rc != 0 && rc != -ENOENT ) {
// consistency cannot be guaranteed
SG_error("fs_entry_revalidate_path(%s) rc = %d\n", path, rc );
return rc;
}
int err = 0;
// get the parent directory and lock it
char* path_dirname = md_dirname( path, NULL );
struct fs_entry* parent = fs_entry_resolve_path( core, path_dirname, user, vol, true, &err );
free( path_dirname );
if( !IS_DIR_READABLE( parent->mode, parent->owner, parent->volume, user, vol ) ) {
// not searchable
fs_entry_unlock( parent );
return -EACCES;
}
if( !IS_WRITEABLE( parent->mode, parent->owner, parent->volume, user, vol ) ) {
// not writeable
fs_entry_unlock( parent );
return -EACCES;
}
uint64_t parent_id = parent->file_id;
char* parent_name = strdup( parent->name );
char* path_basename = md_basename( path, NULL );
// make sure it doesn't exist already (or isn't in the process of being deleted, since we might have to re-create it if deleting it fails)
if( fs_entry_set_find_name( parent->children, path_basename ) != NULL ) {
free( path_basename );
fs_entry_unlock( parent );
free( parent_name );
return -EEXIST;
}
struct fs_entry* child = (struct fs_entry*)calloc( sizeof(struct fs_entry), 1 );
struct timespec ts;
clock_gettime( CLOCK_REALTIME, &ts );
int mmode = 0;
if (S_ISFIFO(mode)) {
mmode = ( mode & 0777 ) | S_IFIFO;
err = fs_entry_init_fifo( core, child, path_basename, 0, fs_entry_next_file_version(), user, core->gateway, vol, mmode, 0, ts.tv_sec, ts.tv_nsec, 0, 0 );
}
if (S_ISREG(mode)) {
mmode = ( mode & 0777 );
err = fs_entry_init_file( core, child, path_basename, 0, fs_entry_next_file_version(), user, core->gateway, vol, mmode, 0, ts.tv_sec, ts.tv_nsec, 0, 0 );
}
if( err == 0 ) {
// mark it as created in this session
child->created_in_session = true;
// we're creating, so this manifest is initialized (to zero blocks)
child->manifest->initialize_empty( child->version );
fs_entry_wlock( child );
// call the driver
err = driver_create_file( core, core->closure, path, child );
if( err != 0 ) {
// undo
SG_error("driver_create_file(%s) rc = %d\n", path, err );
child->open_count = 0;
fs_entry_unlock( child );
fs_entry_destroy( child, false );
free( child );
}
else {
// attach the file
fs_entry_attach_lowlevel( core, parent, child );
struct md_entry data;
fs_entry_to_md_entry( core, &data, child, parent_id, parent_name );
// create the child on the MS, obtaining its file ID and write nonce
err = ms_client_create( core->ms, &child->file_id, &child->write_nonce, &data );
md_entry_free( &data );
if( err != 0 ) {
SG_error( "ms_client_create(%s) rc = %d\n", path, err );
err = -EREMOTEIO;
child->open_count = 0;
fs_entry_unlock( child );
fs_entry_detach_lowlevel( core, parent, child );
free( child );
}
else {
fs_entry_unlock( child );
}
}
}
fs_entry_unlock( parent );
free( parent_name );
free( path_basename );
return err;
}
// carry out the create locally.
// check permissions, initialize the child, and add it as a child of parent.
// return the initialized child (which will NOT be locked) via *ret_child
// return 0 on success
// return -EACCES on permission failure
// parent MUST be write locked
int fs_entry_do_create( struct fs_core* core, char const* path, struct fs_entry* parent, struct fs_entry** ret_child, uint64_t user, uint64_t vol, mode_t mode ) {
int rc = 0;
struct fs_entry* child = NULL;
if( !IS_WRITEABLE(parent->mode, parent->owner, parent->volume, user, vol) ) {
// can't create
return -EACCES;
}
else {
struct timespec ts;
clock_gettime( CLOCK_REALTIME, &ts );
// can create--initialize the child
child = SG_CALLOC( struct fs_entry, 1 );
char* path_basename = md_basename( path, NULL );
rc = fs_entry_init_file( core, child, path_basename, 0, fs_entry_next_file_version(), user, core->gateway, vol, mode, 0, ts.tv_sec, ts.tv_nsec, 0, 0 );
free( path_basename );
if( rc != 0 ) {
SG_error("fs_entry_init_file(%s) rc = %d\n", path, rc );
fs_entry_destroy( child, false );
free( child );
return rc;
}
else {
// mark it as created in this session
child->created_in_session = true;
// we're creating, so this manifest is initialized (to zero blocks)
child->manifest->initialize_empty( child->version );
// run the driver
int driver_rc = driver_create_file( core, core->closure, path, child );
if( driver_rc != 0 ) {
SG_error("driver_create_file(%s) rc = %d\n", path, driver_rc );
fs_entry_destroy( child, false );
free( child );
return driver_rc;
}
// insert it into the filesystem
fs_entry_wlock( child );
// open it
child->open_count++;
fs_entry_setup_working_data( core, child );
fs_entry_attach_lowlevel( core, parent, child );
fs_entry_unlock( child );
*ret_child = child;
}
}
return 0;
}
