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add getopt_long implementation and detection

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This commit is contained in:
James Laird
2013-06-20 00:23:00 +10:00
parent 706e4d6518
commit 3aa8bab70b
6 changed files with 265 additions and 0 deletions
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LICENSES
+7
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@@ -3,6 +3,13 @@ alac.c:
All rights reserved.
see alac.c for full license text
getopt_long.c, getopt_long.h:
Portions Copyright (c) 1987, 1993, 1994
The Regents of the University of California. All rights reserved.
Portions Copyright (c) 2003
PostgreSQL Global Development Group
see getopt_long.[ch] for full license text
Shairport:
Copyright (c) 2011-2013 James Laird <jhl@mafipulation.org>
Makefile
+4
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@@ -19,6 +19,10 @@ ifdef CONFIG_AVAHI
SRCS += avahi.c
endif
ifndef CONFIG_HAVE_GETOPT_H
SRCS += getopt_long.c
endif
# default target
all: shairport
Makefile.tests
+4
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@@ -0,0 +1,4 @@
test_getopt:
echo '#include <getopt.h>' > .test_getopt.c
$(CC) $(CFLAGS) -c .test_getopt.c
rm .test_getopt.c .test_getopt.o
configure
Vendored
+8
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@@ -8,6 +8,14 @@ echo "// automatically generated file" > config.h
LDFLAGS="${LDFLAGS} -lm -lpthread"
if make -f Makefile.tests test_getopt > /dev/null; then
echo "getopt.h found (or compiler broken)"
echo "#define CONFIG_HAVE_GETOPT_H" >> config.h
echo "CONFIG_HAVE_GETOPT_H=yes" >> config.mk
else
echo "getopt.h not found, using our own getopt_long."
fi
if pkg-config openssl 2>/dev/null; then
CFLAGS="${CFLAGS} `pkg-config --cflags openssl`"
LDFLAGS="${LDFLAGS} `pkg-config --libs openssl`"
getopt_long.c
+201
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@@ -0,0 +1,201 @@
/*
* 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.
*
*/
#include <string.h>
#include "common.h"
#include "getopt_long.h"
#define BADCH '?'
#define BADARG ':'
#define EMSG ""
/*
* getopt_long
* Parse argc/argv argument vector, with long options.
*
* This implementation does not use optreset. Instead, we guarantee that
* it can be restarted on a new argv array after a previous call returned -1,
* if the caller resets optind to 1 before the first call of the new series.
* (Internally, this means we must be sure to reset "place" to EMSG before
* returning -1.)
*/
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 (!*place)
{ /* update scanning pointer */
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)
warn(
"%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] != ':')
warn(
"%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 != ':')
warn(
"%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)
warn(
"%s: option requires an argument -- %c\n",
argv[0], optopt);
return BADCH;
}
else
/* white space */
optarg = argv[optind];
place = EMSG;
++optind;
}
return optopt;
}
getopt_long.h
+41
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@@ -0,0 +1,41 @@
/*
* Portions Copyright (c) 1987, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Portions Copyright (c) 2003-2013, PostgreSQL Global Development Group
*
*/
#ifndef GETOPT_LONG_H
#define GETOPT_LONG_H
#include "config.h"
#ifdef CONFIG_HAVE_GETOPT_H
#include <getopt.h>
#else
/* These are picked up from the system's getopt() facility. */
extern int opterr;
extern int optind;
extern int optopt;
extern char *optarg;
struct option
{
const char *name;
int has_arg;
int *flag;
int val;
};
#define no_argument 0
#define required_argument 1
extern int getopt_long(int argc, char *const argv[],
const char *optstring,
const struct option * longopts, int *longindex);
#endif /* CONFIG_HAVE_GETOPT_H */
#endif /* GETOPT_LONG_H */