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98 lines
2.6 KiB
Groff
98 lines
2.6 KiB
Groff
.\"
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.\" $Id: ucpgba.man,v 1.1 1999/11/19 16:08:34 mleisher Exp $
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.\"
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.TH ucpgba 3 "19 November 1999"
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.SH NAME
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ucpgba \- functions for doing bidirectional reordering of Unicode text and
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logical and visual cursor motion
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.SH SYNOPSIS
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.nf
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#include <ucdata.h>
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#include <ucpgba.h>
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ucstring_t *ucstring_create(unsigned long *source, unsigned long start,
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unsigned long end, int default_direction,
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int cursor_motion)
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.sp
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void ucstring_free(ucstring_t *string)
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.sp
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int ucstring_set_cursor_motion(ucstring_t *string, int cursor_motion)
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.sp
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int ucstring_cursor_right(ucstring_t *string, int count)
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.sp
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int ucstring_cursor_left(ucstring_t *string, int count)
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.sp
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void ucstring_cursor_info(ucstring_t *string, int *direction,
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unsigned long *position)
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.SH DESCRIPTION
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.TP 4
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.BR Macros
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UCPGBA_LTR
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.br
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UCPGBA_RTL
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.br
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UCPGBA_CURSOR_VISUAL
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.br
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UCPGBA_CURSOR_LOGICAL
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.TP 4
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.BR ucstring_create()
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This function will create a reordered string by using the implicit
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directionality of the characters in the specified substring.
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.sp
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The `default_direction' parameter should be one of UCPGBA_LTR or UCPGBA_RTL
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and is used only in cases where a string contains no characters with strong
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directionality.
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.sp
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The `cursor_motion' parameter should be one of UCPGBA_CURSOR_VISUAL or
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UCPGBA_CURSOR_LOGICAL, and is used to specify the initial cursor motion
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behavior. This behavior can be switched at any time using
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ustring_set_cursor_motion().
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.TP 4
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.BR ucstring_free()
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This function will deallocate the memory used by the string, including the
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string itself.
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.TP 4
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.BR ucstring_cursor_info()
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This function will return the text position of the internal cursor and the
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directionality of the text at that position. The position returned is the
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original text position of the character.
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.TP 4
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.BR ucstring_set_cursor_motion()
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This function will change the cursor motion type and return the previous
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cursor motion type.
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.TP 4
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.BR ucstring_cursor_right()
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This function will move the internal cursor to the right according to the
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type of cursor motion set for the string.
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.sp
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If no cursor motion is performed, it returns 0. Otherwise it will return a 1.
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.TP 4
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.BR ucstring_cursor_left()
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This function will move the internal cursor to the left according to the
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type of cursor motion set for the string.
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.sp
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If no cursor motion is performed, it returns 0. Otherwise it will return a 1.
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.SH "SEE ALSO"
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ucdata(3)
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.SH ACKNOWLEDGMENTS
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These are people who have helped with patches or alerted me about problems.
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.SH AUTHOR
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Mark Leisher
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.br
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Computing Research Lab
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.br
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New Mexico State University
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.br
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Email: mleisher@crl.nmsu.edu
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