From: Joel Rosdahl Date: Wed, 17 Feb 2010 18:13:27 +0000 (+0100) Subject: Add getopt_long implementation borrowed from PostgreSQL X-Git-Tag: v3.0pre0~89 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=00a9c50bb5c9d506e2029a0471c95d45999b3e28;p=thirdparty%2Fccache.git Add getopt_long implementation borrowed from PostgreSQL --- diff --git a/getopt_long.c b/getopt_long.c new file mode 100644 index 000000000..9433b5682 --- /dev/null +++ b/getopt_long.c @@ -0,0 +1,200 @@ +/* + * getopt_long() -- long options parser + * + * Portions Copyright (c) 1987, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Portions Copyright (c) 2003 + * PostgreSQL Global Development Group + * + * 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. 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. + * + * $PostgreSQL: pgsql/src/port/getopt_long.c,v 1.8 2009/06/11 14:49:15 momjian Exp $ + */ + +#include "c.h" + +#include "getopt_long.h" + +#ifndef HAVE_INT_OPTRESET +int optreset; + +/* else the "extern" was provided by getopt_long.h */ +#endif + +#define BADCH '?' +#define BADARG ':' +#define EMSG "" + + +int +getopt_long(int argc, char *const argv[], + const char *optstring, + const struct option * longopts, int *longindex) +{ + static char *place = EMSG; /* option letter processing */ + char *oli; /* option letter list index */ + + if (optreset || !*place) + { /* update scanning pointer */ + optreset = 0; + + if (optind >= argc) + { + place = EMSG; + return -1; + } + + place = argv[optind]; + + if (place[0] != '-') + { + place = EMSG; + return -1; + } + + place++; + + if (place[0] && place[0] == '-' && place[1] == '\0') + { /* found "--" */ + ++optind; + place = EMSG; + return -1; + } + + if (place[0] && place[0] == '-' && place[1]) + { + /* long option */ + size_t namelen; + int i; + + place++; + + namelen = strcspn(place, "="); + for (i = 0; longopts[i].name != NULL; i++) + { + if (strlen(longopts[i].name) == namelen + && strncmp(place, longopts[i].name, namelen) == 0) + { + if (longopts[i].has_arg) + { + if (place[namelen] == '=') + optarg = place + namelen + 1; + else if (optind < argc - 1) + { + optind++; + optarg = argv[optind]; + } + else + { + if (optstring[0] == ':') + return BADARG; + if (opterr) + fprintf(stderr, + "%s: option requires an argument -- %s\n", + argv[0], place); + place = EMSG; + optind++; + return BADCH; + } + } + else + { + optarg = NULL; + if (place[namelen] != 0) + { + /* XXX error? */ + } + } + + optind++; + + if (longindex) + *longindex = i; + + place = EMSG; + + if (longopts[i].flag == NULL) + return longopts[i].val; + else + { + *longopts[i].flag = longopts[i].val; + return 0; + } + } + } + + if (opterr && optstring[0] != ':') + fprintf(stderr, + "%s: illegal option -- %s\n", argv[0], place); + place = EMSG; + optind++; + return BADCH; + } + } + + /* short option */ + optopt = (int) *place++; + + oli = strchr(optstring, optopt); + if (!oli) + { + if (!*place) + ++optind; + if (opterr && *optstring != ':') + fprintf(stderr, + "%s: illegal option -- %c\n", argv[0], optopt); + return BADCH; + } + + if (oli[1] != ':') + { /* don't need argument */ + optarg = NULL; + if (!*place) + ++optind; + } + else + { /* need an argument */ + if (*place) /* no white space */ + optarg = place; + else if (argc <= ++optind) + { /* no arg */ + place = EMSG; + if (*optstring == ':') + return BADARG; + if (opterr) + fprintf(stderr, + "%s: option requires an argument -- %c\n", + argv[0], optopt); + return BADCH; + } + else + /* white space */ + optarg = argv[optind]; + place = EMSG; + ++optind; + } + return optopt; +} diff --git a/getopt_long.h b/getopt_long.h new file mode 100644 index 000000000..5c3bdd332 --- /dev/null +++ b/getopt_long.h @@ -0,0 +1,44 @@ +/* + * Portions Copyright (c) 1987, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Portions Copyright (c) 2003-2010, PostgreSQL Global Development Group + * + * $PostgreSQL: pgsql/src/include/getopt_long.h,v 1.12 2010/01/02 16:58:00 momjian Exp $ + */ +#ifndef GETOPT_LONG_H +#define GETOPT_LONG_H + +#ifdef HAVE_GETOPT_H +#include +#endif + +/* These are picked up from the system's getopt() facility. */ +extern int opterr; +extern int optind; +extern int optopt; +extern char *optarg; +extern int optreset; + +#ifndef HAVE_STRUCT_OPTION + +struct option +{ + const char *name; + int has_arg; + int *flag; + int val; +}; + +#define no_argument 0 +#define required_argument 1 +#endif + +#ifndef HAVE_GETOPT_LONG + +extern int getopt_long(int argc, char *const argv[], + const char *optstring, + const struct option * longopts, int *longindex); +#endif + +#endif /* GETOPT_LONG_H */