Class: Informix::Slob

Inherits:
Object
  • Object
show all
Defined in:
lib/informix.rb,
ext/informixc.c

Overview

class Statement

Defined Under Namespace

Classes: Stat

Constant Summary collapse

CLOB = 
INT2FIX(XID_CLOB)
BLOB = 
INT2FIX(XID_BLOB)
RDONLY =

Access modes

INT2FIX(LO_RDONLY)
DIRTY_READ = 
INT2FIX(LO_DIRTY_READ)
WRONLY = 
INT2FIX(LO_WRONLY)
APPEND = 
INT2FIX(LO_APPEND)
RDWR = 
INT2FIX(LO_RDWR)
BUFFER = 
INT2FIX(LO_BUFFER)
NOBUFFER = 
INT2FIX(LO_NOBUFFER)
LOCKALL = 
INT2FIX(LO_LOCKALL)
LOCKRANGE = 
INT2FIX(LO_LOCKRANGE)
SEEK_SET = 
INT2FIX(LO_SEEK_SET)
SEEK_CUR = 
INT2FIX(LO_SEEK_CUR)
SEEK_END = 
INT2FIX(LO_SEEK_END)
LOG =

Creation-time flags

INT2FIX(LO_LOG)
NOLOG = 
INT2FIX(LO_NOLOG)
KEEP_LASTACCESS_TIME = 
INT2FIX(LO_KEEP_LASTACCESS_TIME)
NOKEEP_LASTACCESS_TIME = 
INT2FIX(LO_NOKEEP_LASTACCESS_TIME)
CURRENT_END =

Ranges

INT2FIX(LO_CURRENT_END)
MAX_END = 
INT2FIX(LO_MAX_END)
SHARED_MODE =

Lock modes

INT2FIX(LO_SHARED_MODE)
EXCLUSIVE_MODE = 
INT2FIX(LO_EXCLUSIVE_MODE)

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*args) ⇒ Object

:nodoc:



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# File 'ext/informixc.c', line 557

static VALUE
rb_slob_initialize(int argc, VALUE *argv, VALUE self)
{
  mint ret, error;
  slob_t *slob;
  VALUE db, type, options;
  VALUE col_info, sbspace, estbytes, extsz, createflags, openflags, maxbytes;
/*
 *  EXEC SQL begin declare section;
 */
#line 478 "informixc.ec"
#line 479 "informixc.ec"
  char *did;
/*
 *  EXEC SQL end   declare section;
 */
#line 480 "informixc.ec"


  rb_scan_args(argc, argv, "12", &db, &type, &options);
  Data_Get_Struct(db, char, did);

/*
 *  EXEC SQL set connection :did;
 */
#line 485 "informixc.ec"
  {
#line 485 "informixc.ec"
  sqli_connect_set(0, did, 0);
#line 485 "informixc.ec"
  }
  if (SQLCODE < 0)
    raise_ifx_extended();

  Data_Get_Struct(self, slob_t, slob);
  slob->db = db;
  slob->database_id = did;

  if (!NIL_P(type)) {
    int t = FIX2INT(type);
    if (t != XID_CLOB && t != XID_BLOB)
      rb_raise(rb_eInternalError, "Invalid type %d for an SLOB", t);
    slob->type = t;
  }

  col_info = sbspace = estbytes = extsz = createflags = openflags = maxbytes = Qnil;

  if (!NIL_P(options)) {
    Check_Type(options, T_HASH);
    col_info = rb_hash_aref(options, sym_col_info);
    sbspace = rb_hash_aref(options, sym_sbspace);
    estbytes = rb_hash_aref(options, sym_estbytes);
    extsz = rb_hash_aref(options, sym_extsz);
    createflags = rb_hash_aref(options, sym_createflags);
    openflags = rb_hash_aref(options, sym_openflags);
    maxbytes = rb_hash_aref(options, sym_maxbytes);
  }

  ret = ifx_lo_def_create_spec(&slob->spec);
  if (ret < 0)
    raise_ifx_extended();

  if (!NIL_P(col_info)) {
    ret = ifx_lo_col_info(StringValueCStr(col_info), slob->spec);

    if (ret < 0)
      raise_ifx_extended();
  }
  if (!NIL_P(sbspace)) {
    char *c_sbspace = StringValueCStr(sbspace);
    ret = ifx_lo_specset_sbspace(slob->spec, c_sbspace);
    if (ret == -1)
      rb_raise(rb_eOperationalError, "Could not set sbspace name to %s", c_sbspace);
  }
  if (!NIL_P(estbytes)) {
    ifx_int8_t estbytes8;

    NUM2INT8(estbytes, &estbytes8);
    ret = ifx_lo_specset_estbytes(slob->spec, &estbytes8);
    if (ret == -1)
      rb_raise(rb_eOperationalError, "Could not set estbytes");
  }
  if (!NIL_P(extsz)) {
    ret = ifx_lo_specset_extsz(slob->spec, FIX2LONG(extsz));
    if (ret == -1)
      rb_raise(rb_eOperationalError, "Could not set extsz to %ld", FIX2LONG(extsz));
  }
  if (!NIL_P(createflags)) {
    ret = ifx_lo_specset_flags(slob->spec, FIX2LONG(createflags));
    if (ret == -1)
      rb_raise(rb_eOperationalError, "Could not set crate-time flags to 0x%X", FIX2LONG(createflags));
  }
  if (!NIL_P(maxbytes)) {
    ifx_int8_t maxbytes8;

    NUM2INT8(maxbytes, (&maxbytes8));
    ret = ifx_lo_specset_maxbytes(slob->spec, &maxbytes8);
    if (ret == -1)
      rb_raise(rb_eOperationalError, "Could not set maxbytes");
  }

  slob->fd = ifx_lo_create(slob->spec, RTEST(openflags)? FIX2LONG(openflags): LO_RDWR, &slob->lo, &error);
  if (slob->fd == -1)
    raise_ifx_extended();

  return self;
}

Class Method Details

._new ⇒ Object 



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# File 'lib/informix.rb', line 292

alias _new new

.new(dbname, query, options = nil) ⇒ Object

Creates a Slob object.

The Slob object is passed to the block if it’s given, and automatically closes it when the block terminates, returning the value of the block.

type can be Slob::BLOB or Slob::CLOB

options can be a Hash object with the following possible keys:

:sbspace     => Sbspace name
:estbytes    => Estimated size, in bytes
:extsz       => Allocation extent size
:createflags => Create-time flags
:openflags   => Access mode
:maxbytes    => Maximum size
:col_info    => Get the previous values from the column-level storage
                characteristics for the specified database column



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# File 'lib/informix.rb', line 314

def self.new(dbname, query, options = nil)
  slob = _new(dbname, query, options)
  return slob if !block_given?
  begin
    yield slob
  ensure
    slob.close
  end
end

Instance Method Details

#<<(data) ⇒ Object

slob << data => slob

Writes data to the Smart Large Object. If data is not a String object it will be converted to String using to_s.

Returns self.



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# File 'ext/informixc.c', line 906

static VALUE
rb_slob_addstr(VALUE self, VALUE data)
{
  rb_slob_write(self, data);
  return self;
}

#atime ⇒ Object

slob.atime => time

Returns the time of last access as a Time object.



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# File 'ext/informixc.c', line 1582

static VALUE
rb_slob_atime(VALUE self)
{
  return slob_stat(self, slob_atime);
}

#close ⇒ Object

slob.close => slob

Closes the Smart Large Object and returns __self__.



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# File 'ext/informixc.c', line 737

static VALUE
rb_slob_close(VALUE self)
{
  slob_t *slob;

  Data_Get_Struct(self, slob_t, slob);
  if (slob->fd != -1) {
/*
 *    EXEC SQL begin declare section;
 */
#line 626 "informixc.ec"
#line 627 "informixc.ec"
  char *did;
/*
 *    EXEC SQL end   declare section;
 */
#line 628 "informixc.ec"


    did = slob->database_id;
/*
 *    EXEC SQL set connection :did;
 */
#line 631 "informixc.ec"
  {
#line 631 "informixc.ec"
  sqli_connect_set(0, did, 0);
#line 631 "informixc.ec"
  }
    if (SQLCODE < 0)
      return self;

    ifx_lo_close(slob->fd);
    slob->fd = -1;
  }

  return self;
}

#ctime ⇒ Object

stat.ctime => time

Returns the time of last change in status as a Time object.



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# File 'ext/informixc.c', line 1594

static VALUE
rb_slob_ctime(VALUE self)
{
  return slob_stat(self, slob_ctime);
}

#estbytes ⇒ Object

slob.estbytes => fixnum or bignum

Returns the estimated size of the SLOB



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# File 'ext/informixc.c', line 1409

static VALUE
rb_slob_estbytes(VALUE self)
{
  return slob_specget(self, slob_estbytes);
}

#extsz ⇒ Object

slob.extsz => fixnum

Returns the allocation extent size of the SLOB



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# File 'ext/informixc.c', line 1421

static VALUE
rb_slob_extsz(VALUE self)
{
  return slob_specget(self, slob_extsz);
}

#extsz=(value) ⇒ Object

slob.extsz = fixnum => fixnum

Sets the allocation extent size for the SLOB



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# File 'ext/informixc.c', line 1469

static VALUE
rb_slob_set_extsz(VALUE self, VALUE value)
{
  return slob_specset(self, slob_extsz, value);
}

#flags ⇒ Object

slob.flags => fixnum

Returns the create-time flags of the SLOB



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# File 'ext/informixc.c', line 1433

static VALUE
rb_slob_flags(VALUE self)
{
  return slob_specget(self, slob_flags);
}

#flags=(value) ⇒ Object

slob.flags = fixnum => fixnum

Sets the create-time flags of the SLOB



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# File 'ext/informixc.c', line 1481

static VALUE
rb_slob_set_flags(VALUE self, VALUE value)
{
  return slob_specset(self, slob_flags, value);
}

#lock(offset, whence, range, mode) ⇒ Object

slob.lock(offset, whence, range, mode) => slob

Locks range number of bytes, starting from offset bytes from whence, in mode mode.

Returns self.

Possible values:

offset  =>  integer
whence  =>  Slob::SEEK_SET, Slob::SEEK_CUR, Slob::SEEK_END
range   =>  integer, Slob::CURRENT_END, Slob::MAX_END
mode    =>  Slob::SHARED_MODE, Slob::EXCLUSIVE_MODE



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# File 'ext/informixc.c', line 1136

static VALUE
rb_slob_lock(VALUE self, VALUE offset, VALUE whence, VALUE range, VALUE mode)
{
  slob_t *slob;
  mint ret;
  ifx_int8_t offset8, range8;
/*
 *  EXEC SQL begin declare section;
 */
#line 928 "informixc.ec"
#line 929 "informixc.ec"
  char *did;
/*
 *  EXEC SQL end   declare section;
 */
#line 930 "informixc.ec"


  Data_Get_Struct(self, slob_t, slob);

  if (slob->fd == -1)
    rb_raise(rb_eProgrammingError, "Open the Slob object first");

  did = slob->database_id;
/*
 *  EXEC SQL set connection :did;
 */
#line 938 "informixc.ec"
  {
#line 938 "informixc.ec"
  sqli_connect_set(0, did, 0);
#line 938 "informixc.ec"
  }
  if (SQLCODE < 0)
    raise_ifx_extended();

  NUM2INT8(offset, &offset8);
  NUM2INT8(range, &range8);
  ret = ifx_lo_lock(slob->fd, &offset8, FIX2INT(whence), &range8, FIX2INT(mode));
  if (ret < 0)
    raise_ifx_extended();

  return self;
}

#maxbytes ⇒ Object

slob.maxbytes => fixnum or bignum

Returns the maximum size of the SLOB



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# File 'ext/informixc.c', line 1445

static VALUE
rb_slob_maxbytes(VALUE self)
{
  return slob_specget(self, slob_maxbytes);
}

#mtime ⇒ Object

stat.mtime => time

Returns the time of last modification as a Time object.



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# File 'ext/informixc.c', line 1606

static VALUE
rb_slob_mtime(VALUE self)
{
  return slob_stat(self, slob_mtime);
}

#open(*args) ⇒ Object

slob.open(access = Slob::RDONLY) => slob

Opens the Smart Large Object in access mode.

Access modes:

Slob::RDONLY:: Read only Slob::DIRTY_READ:: Read uncommitted data Slob::WRONLY:: Write only Slob::APPEND:: Append data to the end, if combined with RDWR or WRONLY; read only otherwise Slob::RDWR:: Read/Write Slob::BUFFER:: Use standard database server buffer pool Slob::NOBUFFER:: Use private buffer from the session pool of the database server Slob::LOCKALL:: Lock the entire Smart Large Object Slob::LOCKRANGE:: Lock a range of bytes

Returns __self__.



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# File 'ext/informixc.c', line 685

static VALUE
rb_slob_open(int argc, VALUE *argv, VALUE self)
{
  VALUE access;
  slob_t *slob;
  mint error;
/*
 *  EXEC SQL begin declare section;
 */
#line 589 "informixc.ec"
#line 590 "informixc.ec"
  char *did;
/*
 *  EXEC SQL end   declare section;
 */
#line 591 "informixc.ec"


  Data_Get_Struct(self, slob_t, slob);

  if (slob->fd != -1) /* Already open */
    return self;

  did = slob->database_id;
/*
 *  EXEC SQL set connection :did;
 */
#line 599 "informixc.ec"
  {
#line 599 "informixc.ec"
  sqli_connect_set(0, did, 0);
#line 599 "informixc.ec"
  }
  if (SQLCODE < 0)
    raise_ifx_extended();

  rb_scan_args(argc, argv, "01", &access);

  slob->fd = ifx_lo_open(&slob->lo, NIL_P(access)? LO_RDONLY: FIX2INT(access), &error);

  if (slob->fd == -1)
    raise_ifx_extended();

  return self;
}

#pos=(pos) ⇒ Object

slob.pos = integer => integer

Seeks to the given position (in bytes) in slob.



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# File 'ext/informixc.c', line 985

static VALUE
rb_slob_set_pos(VALUE self, VALUE pos)
{
  return rb_slob_seek(self, pos, LO_SEEK_SET);
}

#read(nbytes) ⇒ Object

slob.read(nbytes) => string

Reads at most nbytes bytes from the Smart Large Object.

Returns the bytes read as a String object.



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# File 'ext/informixc.c', line 784

static VALUE
rb_slob_read(VALUE self, VALUE nbytes)
{
  slob_t *slob;
  mint error, ret;
  char *buffer;
  long c_nbytes;
  VALUE str;
/*
 *  EXEC SQL begin declare section;
 */
#line 658 "informixc.ec"
#line 659 "informixc.ec"
  char *did;
/*
 *  EXEC SQL end   declare section;
 */
#line 660 "informixc.ec"



  Data_Get_Struct(self, slob_t, slob);

  if (slob->fd == -1)
    rb_raise(rb_eProgrammingError, "Open the Slob object before reading");

  did = slob->database_id;
/*
 *  EXEC SQL set connection :did;
 */
#line 669 "informixc.ec"
  {
#line 669 "informixc.ec"
  sqli_connect_set(0, did, 0);
#line 669 "informixc.ec"
  }
  if (SQLCODE < 0)
    raise_ifx_extended();

  c_nbytes = FIX2LONG(nbytes);
  buffer = ALLOC_N(char, c_nbytes);
  ret = ifx_lo_read(slob->fd, buffer, c_nbytes, &error);

  if (ret == -1) {
    xfree(buffer);
    raise_ifx_extended();
  }

  str = rb_str_new(buffer, ret);
  xfree(buffer);

  return str;
}

#refcnt ⇒ Object

stat.refcnt => fixnum

Returns the number of references



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# File 'ext/informixc.c', line 1618

static VALUE
rb_slob_refcnt(VALUE self)
{
  return slob_stat(self, slob_refcnt);
}

#rewind ⇒ Object

slob.rewind => fixnum

Moves the cursor position to the start of the Smart Large Object.



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# File 'ext/informixc.c', line 997

static VALUE
rb_slob_rewind(VALUE self)
{
  return rb_slob_seek(self, INT2FIX(0), LO_SEEK_SET);
}

#sbspace ⇒ Object

slob.sbspace => string

Returns the name of the sbspace where the SLOB is stored



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# File 'ext/informixc.c', line 1457

static VALUE
rb_slob_sbspace(VALUE self)
{
  return slob_specget(self, slob_sbspace);
}

#seek(offset, whence) ⇒ Object

slob.seek(offset, whence) => fixnum or bignum

Sets the file position for the next read or write operation on the open Smart Large Object.

offset offset from the starting seek position whence identifies the starting seek position

Values for whence:

Slob::SEEK_SET:: The start of the Smart Large Object Slob::SEEK_CUR:: The current seek position in the Smart Large Object Slob::SEEK_END:: The end of the Smart Large Object

Returns the new position.



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# File 'ext/informixc.c', line 932

static VALUE
rb_slob_seek(VALUE self, VALUE offset, VALUE whence)
{
  slob_t *slob;
  mint ret;
  VALUE seek_pos;
  ifx_int8_t offset8, seek_pos8;
/*
 *  EXEC SQL begin declare section;
 */
#line 773 "informixc.ec"
#line 774 "informixc.ec"
  char *did;
/*
 *  EXEC SQL end   declare section;
 */
#line 775 "informixc.ec"


  Data_Get_Struct(self, slob_t, slob);

  if (slob->fd == -1)
    rb_raise(rb_eProgrammingError, "Open the Slob object first");

  did = slob->database_id;
/*
 *  EXEC SQL set connection :did;
 */
#line 783 "informixc.ec"
  {
#line 783 "informixc.ec"
  sqli_connect_set(0, did, 0);
#line 783 "informixc.ec"
  }
  if (SQLCODE < 0)
    raise_ifx_extended();

  NUM2INT8(offset, &offset8);
  ret = ifx_lo_seek(slob->fd, &offset8, FIX2INT(whence), &seek_pos8);
  if (ret < 0)
    raise_ifx_extended();

  INT82NUM(&seek_pos8, seek_pos);

  return seek_pos;
}

#size ⇒ Object

stat.size => fixnum or bignum

Returns the size in bytes



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# File 'ext/informixc.c', line 1630

static VALUE
rb_slob_size(VALUE self)
{
  return slob_stat(self, slob_size);
}

#stat ⇒ Object

slob.stat => stat

Creates and returns an Slob::Stat object with status information for slob.



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# File 'ext/informixc.c', line 1114

static VALUE
rb_slob_stat(VALUE self)
{
  return rb_class_new_instance(1, &self, rb_cSlobStat);
}

#tell ⇒ Object Also known as: pos

slob.tell => integer slob.pos => integer

Returns the current file or seek position for an open Smart Large Object



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# File 'ext/informixc.c', line 1010

static VALUE
rb_slob_tell(VALUE self)
{
  slob_t *slob;
  mint ret;
  VALUE seek_pos;
  ifx_int8_t seek_pos8;
/*
 *  EXEC SQL begin declare section;
 */
#line 835 "informixc.ec"
#line 836 "informixc.ec"
  char *did;
/*
 *  EXEC SQL end   declare section;
 */
#line 837 "informixc.ec"


  Data_Get_Struct(self, slob_t, slob);

  if (slob->fd == -1)
    rb_raise(rb_eProgrammingError, "Open the Slob object first");

  did = slob->database_id;
/*
 *  EXEC SQL set connection :did;
 */
#line 845 "informixc.ec"
  {
#line 845 "informixc.ec"
  sqli_connect_set(0, did, 0);
#line 845 "informixc.ec"
  }
  if (SQLCODE < 0)
    raise_ifx_extended();

  ret = ifx_lo_tell(slob->fd, &seek_pos8);
  if (ret < 0)
    raise_ifx_extended();

  INT82NUM(&seek_pos8, seek_pos);

  return seek_pos;
}

#truncate(offset) ⇒ Object

slob.truncate(offset) => slob

Truncates a Smart Large Object at a specified byte position.

Returns __self__.



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# File 'ext/informixc.c', line 1064

static VALUE
rb_slob_truncate(VALUE self, VALUE offset)
{
  slob_t *slob;
  mint ret;
  ifx_int8_t offset8;
/*
 *  EXEC SQL begin declare section;
 */
#line 872 "informixc.ec"
#line 873 "informixc.ec"
  char *did;
/*
 *  EXEC SQL end   declare section;
 */
#line 874 "informixc.ec"


  Data_Get_Struct(self, slob_t, slob);

  if (slob->fd == -1)
    rb_raise(rb_eProgrammingError, "Open the Slob object first");

  did = slob->database_id;
/*
 *  EXEC SQL set connection :did;
 */
#line 882 "informixc.ec"
  {
#line 882 "informixc.ec"
  sqli_connect_set(0, did, 0);
#line 882 "informixc.ec"
  }
  if (SQLCODE < 0)
    raise_ifx_extended();

  NUM2INT8(offset, &offset8);
  ret = ifx_lo_truncate(slob->fd, &offset8);
  if (ret < 0)
    raise_ifx_extended();

  return self;
}

#unlock(offset, whence, range) ⇒ Object

slob.unlock(offset, whence, range) => slob

Unlocks range number of bytes, starting from offset bytes from whence.

Returns self.

Possible values:

offset  =>  integer
whence  =>  Slob::SEEK_SET, Slob::SEEK_CUR, Slob::SEEK_END
range   =>  integer



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# File 'ext/informixc.c', line 1196

static VALUE
rb_slob_unlock(VALUE self, VALUE offset, VALUE whence, VALUE range)
{
  slob_t *slob;
  mint ret;
  ifx_int8_t offset8, range8;
/*
 *  EXEC SQL begin declare section;
 */
#line 972 "informixc.ec"
#line 973 "informixc.ec"
  char *did;
/*
 *  EXEC SQL end   declare section;
 */
#line 974 "informixc.ec"


  Data_Get_Struct(self, slob_t, slob);

  if (slob->fd == -1)
    rb_raise(rb_eProgrammingError, "Open the Slob object first");

  did = slob->database_id;
/*
 *  EXEC SQL set connection :did;
 */
#line 982 "informixc.ec"
  {
#line 982 "informixc.ec"
  sqli_connect_set(0, did, 0);
#line 982 "informixc.ec"
  }
  if (SQLCODE < 0)
    raise_ifx_extended();

  NUM2INT8(offset, &offset8);
  NUM2INT8(range, &range8);
  ret = ifx_lo_unlock(slob->fd, &offset8, FIX2INT(whence), &range8);
  if (ret < 0)
    raise_ifx_extended();

  return self;
}

#write(data) ⇒ Object

slob.write(data) => fixnum or bignum

Writes data to the Smart Large Object. If data is not a String object it will be converted to String using to_s.

Returns the number of bytes written.



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# File 'ext/informixc.c', line 847

static VALUE
rb_slob_write(VALUE self, VALUE data)
{
  slob_t *slob;
  mint error, ret;
  char *buffer;
  long nbytes;
  VALUE str;
/*
 *  EXEC SQL begin declare section;
 */
#line 705 "informixc.ec"
#line 706 "informixc.ec"
  char *did;
/*
 *  EXEC SQL end   declare section;
 */
#line 707 "informixc.ec"


  Data_Get_Struct(self, slob_t, slob);

  if (slob->fd == -1)
    rb_raise(rb_eProgrammingError, "Open the Slob object before writing");

  did = slob->database_id;
/*
 *  EXEC SQL set connection :did;
 */
#line 715 "informixc.ec"
  {
#line 715 "informixc.ec"
  sqli_connect_set(0, did, 0);
#line 715 "informixc.ec"
  }
  if (SQLCODE < 0)
    raise_ifx_extended();

  str = rb_obj_as_string(data);
  buffer = RSTRING_PTR(str);
  nbytes = RSTRING_LEN(str);

  ret = ifx_lo_write(slob->fd, buffer, nbytes, &error);

  if (ret == -1)
    raise_ifx_extended();

  return LONG2NUM(ret);
}