I wrote these two trivial utilities for the purpose of canonicalizing source
code before checkins and to deal with FreeBSD's inability to deal with CRLF line
endings, and because I can never figure out the right settings for git to make
it do the canonicalization.
tolf - converts LF, CR, and CRLF line endings to LF.
detab - converts all tabs to the correct number of spaces. Assumes tabs are 8
column tabs. Removes trailing whitespace from lines.
Posted here just in case someone wonders what they are.
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/* Replace tabs with spaces, and remove trailing whitespace from lines.
*/
import std.file;
import std.path;
int main(string[] args)
{
foreach (f; args[1 .. $])
{
auto input = cast(char[]) std.file.read(f);
auto output = filter(input);
if (output != input)
std.file.write(f, output);
}
return 0;
}
char[] filter(char[] input)
{
char[] output;
size_t j;
int column;
for (size_t i = 0; i < input.length; i++)
{
auto c = input[i];
switch (c)
{
case '\t':
while ((column & 7) != 7)
{ output ~= ' ';
j++;
column++;
}
c = ' ';
column++;
break;
case '\r':
case '\n':
while (j && output[j - 1] == ' ')
j--;
output = output[0 .. j];
column = 0;
break;
default:
column++;
break;
}
output ~= c;
j++;
}
while (j && output[j - 1] == ' ')
j--;
return output[0 .. j];
}
-----------------------------------------------------
/* Replace line endings with LF
*/
import std.file;
import std.path;
int main(string[] args)
{
foreach (f; args[1 .. $])
{
auto input = cast(char[]) std.file.read(f);
auto output = filter(input);
if (output != input)
std.file.write(f, output);
}
return 0;
}
char[] filter(char[] input)
{
char[] output;
size_t j;
for (size_t i = 0; i < input.length; i++)
{
auto c = input[i];
switch (c)
{
case '\r':
c = '\n';
break;
case '\n':
if (i && input[i - 1] == '\r')
continue;
break;
case 0:
continue;
default:
break;
}
output ~= c;
j++;
}
return output[0 .. j];
}
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