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/* vi: set sw=4 ts=4:
*
* dos2unix.c - convert newline format
*
* Copyright 2012 Rob Landley <rob@landley.net>
*
* No standard
USE_DOS2UNIX(NEWTOY(dos2unix, NULL, TOYFLAG_BIN))
USE_DOS2UNIX(OLDTOY(unix2dos, dos2unix, NULL, TOYFLAG_BIN))
config DOS2UNIX
bool "dos2unix/unix2dos"
default y
help
usage: dos2unix/unix2dos [file...]
Convert newline format between dos (\r\n) and unix (just \n)
If no files listed copy from stdin, "-" is a synonym for stdin.
*/
#include "toys.h"
DEFINE_GLOBALS(
char *tempfile;
)
#define TT this.dos2unix
static void do_dos2unix(int fd, char *name)
{
char c = toys.which->name[0];
int outfd = 1, catch = 0;
if (fd) outfd = copy_tempfile(fd, name, &TT.tempfile);
for (;;) {
int len, in, out;
len = read(fd, toybuf+(sizeof(toybuf)/2), sizeof(toybuf)/2);
if (len<0) {
perror_msg("%s",name);
toys.exitval = 1;
}
if (len<1) break;
for (in = out = 0; in < len; in++) {
char x = toybuf[in+sizeof(toybuf)/2];
// Drop \r only if followed by \n in dos2unix mode
if (catch) {
if (c == 'u' || x != '\n') toybuf[out++] = '\r';
catch = 0;
// Add \r only if \n not after \r in unix2dos mode
} else if (c == 'u' && x == '\n') toybuf[out++] = '\r';
if (x == '\r') catch++;
else toybuf[out++] = x;
}
xwrite(outfd, toybuf, out);
}
if (catch) xwrite(outfd, "\r", 1);
if (fd) replace_tempfile(-1, outfd, &TT.tempfile);
}
void dos2unix_main(void)
{
loopfiles(toys.optargs, do_dos2unix);
}
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