diff options
Diffstat (limited to 'text_cmds/expand/expand.c')
| -rw-r--r-- | text_cmds/expand/expand.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/text_cmds/expand/expand.c b/text_cmds/expand/expand.c new file mode 100644 index 0000000..73a3ee0 --- /dev/null +++ b/text_cmds/expand/expand.c @@ -0,0 +1,200 @@ +/* + * Copyright (c) 1980, 1993 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static const char copyright[] = +"@(#) Copyright (c) 1980, 1993\n\ + The Regents of the University of California. All rights reserved.\n"; +#endif /* not lint */ + +#ifndef lint +#if 0 +static char sccsid[] = "@(#)expand.c 8.1 (Berkeley) 6/9/93"; +#endif +#endif /* not lint */ +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: src/usr.bin/expand/expand.c,v 1.15 2004/06/24 13:42:26 tjr Exp $"); + +#include <ctype.h> +#include <err.h> +#include <locale.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <wchar.h> +#include <wctype.h> + +/* + * expand - expand tabs to equivalent spaces + */ +int nstops; +int tabstops[100]; + +static void getstops(char *); +static void usage(void); + +int +main(int argc, char *argv[]) +{ + const char *curfile; + wint_t wc; + int c, column; + int n; + int rval; + int width; + + setlocale(LC_CTYPE, ""); + + /* handle obsolete syntax */ + while (argc > 1 && argv[1] && argv[1][0] == '-' && + isdigit((unsigned char)argv[1][1])) { + getstops(&argv[1][1]); + argc--; argv++; + } + + while ((c = getopt (argc, argv, "t:")) != -1) { + switch (c) { + case 't': + getstops(optarg); + break; + case '?': + default: + usage(); + /* NOTREACHED */ + } + } + argc -= optind; + argv += optind; + + rval = 0; + do { + if (argc > 0 && *argv) { + if (freopen(argv[0], "r", stdin) == NULL) { + warn("%s", argv[0]); + rval = 1; + argc--, argv++; + continue; + } + curfile = argv[0]; + argc--, argv++; + } else + curfile = "stdin"; + column = 0; + while ((wc = getwchar()) != WEOF) { + switch (wc) { + case '\t': + if (nstops == 0) { + do { + putwchar(' '); + column++; + } while (column & 07); + continue; + } + if (nstops == 1) { + do { + putwchar(' '); + column++; + } while (((column - 1) % tabstops[0]) != (tabstops[0] - 1)); + continue; + } + for (n = 0; n < nstops; n++) + if (tabstops[n] > column) + break; + if (n == nstops) { + putwchar(' '); + column++; + continue; + } + while (column < tabstops[n]) { + putwchar(' '); + column++; + } + continue; + + case '\b': + if (column) + column--; + putwchar('\b'); + continue; + + default: + putwchar(wc); + if ((width = wcwidth(wc)) > 0) + column += width; + continue; + + case '\n': + putwchar(wc); + column = 0; + continue; + } + } + if (ferror(stdin)) { + warn("%s", curfile); + rval = 1; + } + } while (argc > 0); + exit(rval); +} + +static void +getstops(char *cp) +{ + int i; + + nstops = 0; + for (;;) { + i = 0; + while (*cp >= '0' && *cp <= '9') + i = i * 10 + *cp++ - '0'; + if (i <= 0) + errx(1, "bad tab stop spec"); + if (nstops > 0 && i <= tabstops[nstops-1]) + errx(1, "bad tab stop spec"); + if (nstops == sizeof(tabstops) / sizeof(*tabstops)) + errx(1, "too many tab stops"); + tabstops[nstops++] = i; + if (*cp == 0) + break; + if (*cp != ',' && !isblank((unsigned char)*cp)) + errx(1, "bad tab stop spec"); + cp++; + } +} + +static void +usage(void) +{ + (void)fprintf (stderr, "usage: expand [-t tablist] [file ...]\n"); + exit(1); +} |