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PX_GET_DATA_ALPHA

Name

PX_get_data_alpha -- Get alpha data field

Synopsis

#include <paradox.h>

int PX_get_data_alpha(pxdoc_t *pxdoc, char *data, int len, char **value)

DESCRIPTION

Converts a data field as it is stored in the database file into a string for the given encoding. You must set the target encoding before in order to recode the string. If you do not set the encoding the data will be returned as is. You should use this function instead of accessing the data directly.

data points to the start of the data field in the record. It must be calculated by summing up all field length before the field to operate on and add it to the base pointer of the record.

The function allocates memory for the string returned in *value. This memory has to be freed by the application.

Note

This function is deprecated and obsolete if PX_retrieve_record(3) is used.

RETURN VALUE

Returns 0 if the field data starts with a null byte, -1 in case of an error and 1 otherwise.

SEE ALSO

PX_get_data_byte(3), PX_get_data_long(3), PX_get_data_short(3), PX_get_data_double(3), PX_get_data_bcd(3), PX_get_data_blob(3)

AUTHOR

This manual page was written by Uwe Steinmann .

Latest News

Released version 0.6.6

April 07, 2016

This release fixes some more typos in the documentation.

Released version 0.6.5

Jannuary 11, 2012

pxlib isn't dead, its development has just slowed down. This release fixes some typos and optimizes the configuration process.

Released version 0.6.2

September 19, 2007

This one fixes a long lasting bug on 64 bit architectures. It also is compilable in a mingw environment and Visual C++ with the help of cmake.

Released version 0.6.1

March 29, 2006

There were some bugs related to the changes of the last release. This version fixes them. Besides that the following has changed:

  • Much better support for secondary indexes
  • PX_insert_record() and PX_update_record() treat null values propperly
  • PX_delete_record() now updates the internal index without corrupting it.
  • Various man page updates.
  • Auto increment fields of type pxfAutoInc.
  • Fixed some compile errors and warnings.
  • Fixed various small bugs and memory leaks.

Released version 0.6.0

February 6, 2006

This version includes some major changes to the api while retaining compatible to older versions. If you use the new functions expect bugs but also a much simplier record handling.

  • Databases can be read and written after opening with PX_open_xxx()
  • Use a cache for reading encrypted blobs
  • Added new functions PX_delete_record(), PX_update_record(), PX_insert_record(), PX_retrieve_record()
  • reading and writing encrypted blob files is more efficient.
  • No more than 64 blobs will be stored in blocks of type 3
  • Fixed various small bugs and memory leaks.

Released version 0.5.1

August 11, 2005

  • fixed bug when reading header of blob (Thanks to Giovanni Giacobbi)
  • fixes bug when reading blobs of a certain size from an encrypted .mb file.
  • reading and writing encrypted blob files is more efficient.

Released version 0.5.0

July 14, 2005

  • support for encrypted databases and blob files

New web site

02 Feb 05

After a long time the web site has been overhauled with much more information about pxlib.

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