77 lines
1.6 KiB
C
77 lines
1.6 KiB
C
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/* dos2unix.c - convert newline format
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*
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* Copyright 2012 Rob Landley <rob@landley.net>
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USE_DOS2UNIX(NEWTOY(dos2unix, 0, TOYFLAG_BIN))
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USE_UNIX2DOS(NEWTOY(unix2dos, 0, TOYFLAG_BIN))
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config DOS2UNIX
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bool "dos2unix/unix2dos"
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default y
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help
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usage: dos2unix [FILE...]
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Convert newline format from dos "\r\n" to unix "\n".
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If no files listed copy from stdin, "-" is a synonym for stdin.
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config UNIX2DOS
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bool "unix2dos"
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default y
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help
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usage: unix2dos [FILE...]
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Convert newline format from unix "\n" to dos "\r\n".
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If no files listed copy from stdin, "-" is a synonym for stdin.
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*/
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#define FOR_dos2unix
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#include "toys.h"
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GLOBALS(
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char *tempfile;
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)
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static void do_dos2unix(int fd, char *name)
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{
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char c = toys.which->name[0];
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int outfd = 1, catch = 0;
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if (fd) outfd = copy_tempfile(fd, name, &TT.tempfile);
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for (;;) {
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int len, in, out;
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len = read(fd, toybuf+(sizeof(toybuf)/2), sizeof(toybuf)/2);
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if (len<0) perror_msg_raw(name);
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if (len<1) break;
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for (in = out = 0; in < len; in++) {
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char x = toybuf[in+sizeof(toybuf)/2];
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// Drop \r only if followed by \n in dos2unix mode
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if (catch) {
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if (c == 'u' || x != '\n') toybuf[out++] = '\r';
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catch = 0;
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// Add \r only if \n not after \r in unix2dos mode
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} else if (c == 'u' && x == '\n') toybuf[out++] = '\r';
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if (x == '\r') catch++;
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else toybuf[out++] = x;
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}
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xwrite(outfd, toybuf, out);
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}
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if (catch) xwrite(outfd, "\r", 1);
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if (fd) replace_tempfile(-1, outfd, &TT.tempfile);
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}
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void dos2unix_main(void)
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{
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loopfiles(toys.optargs, do_dos2unix);
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}
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void unix2dos_main(void)
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{
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dos2unix_main();
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}
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