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Diffstat (limited to 'text_cmds/pr/egetopt.c')
| -rw-r--r-- | text_cmds/pr/egetopt.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/text_cmds/pr/egetopt.c b/text_cmds/pr/egetopt.c new file mode 100644 index 0000000..46257f4 --- /dev/null +++ b/text_cmds/pr/egetopt.c @@ -0,0 +1,218 @@ +/*- + * Copyright (c) 1991 Keith Muller. + * Copyright (c) 1993 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Keith Muller of the University of California, San Diego. + * + * 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. + */ + +#if 0 +#ifndef lint +static char sccsid[] = "@(#)egetopt.c 8.1 (Berkeley) 6/6/93"; +#endif /* not lint */ +#endif + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD: src/usr.bin/pr/egetopt.c,v 1.3 2002/06/23 20:42:30 charnier Exp $"); + +#include <ctype.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "extern.h" + +/* + * egetopt: get option letter from argument vector (an extended + * version of getopt). + * + * Non standard additions to the ostr specs are: + * 1) '?': immediate value following arg is optional (no white space + * between the arg and the value) + * 2) '#': +/- followed by a number (with an optional sign but + * no white space between the arg and the number). The - may be + * combined with other options, but the + cannot. + */ + +int eopterr = 1; /* if error message should be printed */ +int eoptind = 1; /* index into parent argv vector */ +int eoptopt; /* character checked for validity */ +char *eoptarg; /* argument associated with option */ + +#define BADCH (int)'?' + +static char emsg[] = ""; + +int +egetopt(int nargc, char * const *nargv, const char *ostr) +{ + static char *place = emsg; /* option letter processing */ + char *oli; /* option letter list index */ + static int delim; /* which option delimeter */ + char *p; + static char savec = '\0'; + + if (savec != '\0') { + *place = savec; + savec = '\0'; + } + + if (!*place) { + /* + * update scanning pointer + */ + if ((eoptind >= nargc) || + ((*(place = nargv[eoptind]) != '-') && (*place != '+'))) { + place = emsg; + return (-1); + } + + delim = (int)*place; + if (place[1] && *++place == '-' && !place[1]) { + /* + * found "--" + */ + ++eoptind; + place = emsg; + return (-1); + } + } + + /* + * check option letter + */ + if ((eoptopt = (int)*place++) == (int)':' || (eoptopt == (int)'?') || + !(oli = strchr(ostr, eoptopt))) { + /* + * if the user didn't specify '-' as an option, + * assume it means -1 when by itself. + */ + if ((eoptopt == (int)'-') && !*place) + return (-1); + if (strchr(ostr, '#') && (isdigit(eoptopt) || + (((eoptopt == (int)'-') || (eoptopt == (int)'+')) && + isdigit(*place)))) { + /* + * # option: +/- with a number is ok + */ + for (p = place; *p != '\0'; ++p) { + if (!isdigit(*p)) + break; + } + eoptarg = place-1; + + if (*p == '\0') { + place = emsg; + ++eoptind; + } else { + place = p; + savec = *p; + *place = '\0'; + } + return (delim); + } + + if (!*place) + ++eoptind; + if (eopterr) { + if (!(p = strrchr(*nargv, '/'))) + p = *nargv; + else + ++p; + (void)fprintf(stderr, "%s: illegal option -- %c\n", + p, eoptopt); + } + return (BADCH); + } + if (delim == (int)'+') { + /* + * '+' is only allowed with numbers + */ + if (!*place) + ++eoptind; + if (eopterr) { + if (!(p = strrchr(*nargv, '/'))) + p = *nargv; + else + ++p; + (void)fprintf(stderr, + "%s: illegal '+' delimiter with option -- %c\n", + p, eoptopt); + } + return (BADCH); + } + ++oli; + if ((*oli != ':') && (*oli != '?')) { + /* + * don't need argument + */ + eoptarg = NULL; + if (!*place) + ++eoptind; + return (eoptopt); + } + + if (*place) { + /* + * no white space + */ + eoptarg = place; + } else if (*oli == '?') { + /* + * no arg, but NOT required + */ + eoptarg = NULL; + } else if (nargc <= ++eoptind) { + /* + * no arg, but IS required + */ + place = emsg; + if (eopterr) { + if (!(p = strrchr(*nargv, '/'))) + p = *nargv; + else + ++p; + (void)fprintf(stderr, + "%s: option requires an argument -- %c\n", p, + eoptopt); + } + return (BADCH); + } else { + /* + * arg has white space + */ + eoptarg = nargv[eoptind]; + } + place = emsg; + ++eoptind; + return (eoptopt); +} |