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cvt.c
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cvt.c
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/*
* Copyright (C) 1984-2023 Mark Nudelman
*
* You may distribute under the terms of either the GNU General Public
* License or the Less License, as specified in the README file.
*
* For more information, see the README file.
*/
/*
* Routines to convert text in various ways. Used by search.
*/
#include "less.h"
#include "charset.h"
extern int utf_mode;
/*
* Get the length of a buffer needed to convert a string.
*/
public size_t cvt_length(size_t len, int ops)
{
if (utf_mode)
/*
* Just copying a string in UTF-8 mode can cause it to grow
* in length.
* Four output bytes for one input byte is the worst case.
*/
len *= 4;
return (len + 1);
}
/*
* Allocate a chpos array for use by cvt_text.
*/
public int * cvt_alloc_chpos(size_t len)
{
int i;
int *chpos = (int *) ecalloc(len, sizeof(int));
/* Initialize all entries to an invalid position. */
for (i = 0; i < len; i++)
chpos[i] = -1;
return (chpos);
}
/*
* Convert text. Perform the transformations specified by ops.
* Returns converted text in odst. The original offset of each
* odst character (when it was in osrc) is returned in the chpos array.
*/
public void cvt_