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1109058A
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1993-07-08
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2KB
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52 lines
// strdetab.cpp
#include "stdhdr.h"
#include "strdetab.h"
const char * strdetab (char * out_buf,
const int max_line_length,
const char * in_buf,
const int no_of_tabs,
const int * tab_stops,
int * char_line_length)
{
char * in = (char *) in_buf, * out = out_buf;
int out_count = 0;
while (*in && out_count < max_line_length)
if (*in == '\t')
{ // tab found
if (no_of_tabs == 1)
// The tab interval is specified
{
int tab_interval = *tab_stops;
int next_tab_stop = (out_count
/ tab_interval + 1)
* tab_interval;
while (out_count < max_line_length
&& out_count < next_tab_stop)
// insert spaces in place of the tab
{*out++ = ' '; out_count++;}
}
else
// The positions of the tabs are given
{
for (int i = 0;
i < no_of_tabs
&& tab_stops [i] <= out_count;
i++);
// all the work is in the iteration!
// find the required tab stop
while (out_count < max_line_length
&& out_count < tab_stops [i])
// insert spaces in place of the tab
{*out++ = ' '; out_count++;}
}
in++; // move on to next char
}
else // No tab, so copy the character
{*out++ = *in++; out_count++;}
*out = '\0'; // Null-terminate the string
if (char_line_length != NULL) * char_line_length = strlen (out_buf);
return out_buf;
}