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- /* dos2unix.c - convert newline format
- *
- * Copyright 2012 Rob Landley <rob@landley.net>
- USE_DOS2UNIX(NEWTOY(dos2unix, 0, TOYFLAG_BIN))
- USE_UNIX2DOS(NEWTOY(unix2dos, 0, TOYFLAG_BIN))
- config DOS2UNIX
- bool "dos2unix/unix2dos"
- default y
- help
- usage: dos2unix [FILE...]
- Convert newline format from dos "\r\n" to unix "\n".
- If no files listed copy from stdin, "-" is a synonym for stdin.
- config UNIX2DOS
- bool "unix2dos"
- default y
- help
- usage: unix2dos [FILE...]
- Convert newline format from unix "\n" to dos "\r\n".
- If no files listed copy from stdin, "-" is a synonym for stdin.
- */
- #define FOR_dos2unix
- #include "toys.h"
- GLOBALS(
- char *tempfile;
- )
- 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_raw(name);
- 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);
- }
- void unix2dos_main(void)
- {
- dos2unix_main();
- }
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