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i2p.i2p/core/java/src/gnu/getopt/Getopt.java
zzz 4dc1241d2f Add lightweight getopt command line parsing lib 
(ticket #1173)
This is Java getopt 1.0.14 (released 2012/02/08)
Source was retrieved from https://github.com/arenn/java-getopt
Previous version 1.0.13 (released 2006/08/29)
is available at http://www.urbanophile.com/arenn/hacking/getopt/
Copyright (c) 1998 by Aaron M. Renn (arenn@urbanophile.com),
LGPL v2.
Include the small translation files, add to build.xml and to .tx/config
Fixes:
  Simplified Chinese
    MessagesBundle_chs.properties renamed to MessagesBundle_zh.properties
  Traditional Chinese
    MessagesBundle_cht.properties renamed to MessagesBundle_zh_TW.properties
  Norwegian Bokmaal
    MessagesBundle_no.properties renamed to MessagesBundle_nb.properties
2014-02-02 15:12:44 +00:00

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/**************************************************************************
/* Getopt.java -- Java port of GNU getopt from glibc 2.0.6
/*
/* Copyright (c) 1987-1997 Free Software Foundation, Inc.
/* Java Port Copyright (c) 1998 by Aaron M. Renn (arenn@urbanophile.com)
/*
/* This program is free software; you can redistribute it and/or modify
/* it under the terms of the GNU Library General Public License as published
/* by the Free Software Foundation; either version 2 of the License or
/* (at your option) any later version.
/*
/* This program is distributed in the hope that it will be useful, but
/* WITHOUT ANY WARRANTY; without even the implied warranty of
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
/* GNU Library General Public License for more details.
/*
/* You should have received a copy of the GNU Library General Public License
/* along with this program; see the file COPYING.LIB. If not, write to
/* the Free Software Foundation Inc., 59 Temple Place - Suite 330,
/* Boston, MA 02111-1307 USA
/**************************************************************************/
package gnu.getopt;
import java.util.Locale;
import java.util.ResourceBundle;
import java.text.MessageFormat;
/**************************************************************************/
/**
* This is a Java port of GNU getopt, a class for parsing command line
* arguments passed to programs. It it based on the C getopt() functions
* in glibc 2.0.6 and should parse options in a 100% compatible manner.
* If it does not, that is a bug. The programmer's interface is also
* very compatible.
* <p>
* To use Getopt, create a Getopt object with a argv array passed to the
* main method, then call the getopt() method in a loop. It will return an
* int that contains the value of the option character parsed from the
* command line. When there are no more options to be parsed, it
* returns -1.
* <p>
* A command line option can be defined to take an argument. If an
* option has an argument, the value of that argument is stored in an
* instance variable called optarg, which can be accessed using the
* getOptarg() method. If an option that requires an argument is
* found, but there is no argument present, then an error message is
* printed. Normally getopt() returns a '?' in this situation, but
* that can be changed as described below.
* <p>
* If an invalid option is encountered, an error message is printed
* to the standard error and getopt() returns a '?'. The value of the
* invalid option encountered is stored in the instance variable optopt
* which can be retrieved using the getOptopt() method. To suppress
* the printing of error messages for this or any other error, set
* the value of the opterr instance variable to false using the
* setOpterr() method.
* <p>
* Between calls to getopt(), the instance variable optind is used to
* keep track of where the object is in the parsing process. After all
* options have been returned, optind is the index in argv of the first
* non-option argument. This variable can be accessed with the getOptind()
* method.
* <p>
* Note that this object expects command line options to be passed in the
* traditional Unix manner. That is, proceeded by a '-' character.
* Multiple options can follow the '-'. For example "-abc" is equivalent
* to "-a -b -c". If an option takes a required argument, the value
* of the argument can immediately follow the option character or be
* present in the next argv element. For example, "-cfoo" and "-c foo"
* both represent an option character of 'c' with an argument of "foo"
* assuming c takes a required argument. If an option takes an argument
* that is not required, then any argument must immediately follow the
* option character in the same argv element. For example, if c takes
* a non-required argument, then "-cfoo" represents option character 'c'
* with an argument of "foo" while "-c foo" represents the option
* character 'c' with no argument, and a first non-option argv element
* of "foo".
* <p>
* The user can stop getopt() from scanning any further into a command line
* by using the special argument "--" by itself. For example:
* "-a -- -d" would return an option character of 'a', then return -1
* The "--" is discarded and "-d" is pointed to by optind as the first
* non-option argv element.
* <p>
* Here is a basic example of using Getopt:
* <p>
* <pre>
* Getopt g = new Getopt("testprog", argv, "ab:c::d");
* //
* int c;
* String arg;
* while ((c = g.getopt()) != -1)
* {
* switch(c)
* {
* case 'a':
* case 'd':
* System.out.print("You picked " + (char)c + "\n");
* break;
* //
* case 'b':
* case 'c':
* arg = g.getOptarg();
* System.out.print("You picked " + (char)c +
* " with an argument of " +
* ((arg != null) ? arg : "null") + "\n");
* break;
* //
* case '?':
* break; // getopt() already printed an error
* //
* default:
* System.out.print("getopt() returned " + c + "\n");
* }
* }
* </pre>
* <p>
* In this example, a new Getopt object is created with three params.
* The first param is the program name. This is for printing error
* messages in the form "program: error message". In the C version, this
* value is taken from argv[0], but in Java the program name is not passed
* in that element, thus the need for this parameter. The second param is
* the argument list that was passed to the main() method. The third
* param is the list of valid options. Each character represents a valid
* option. If the character is followed by a single colon, then that
* option has a required argument. If the character is followed by two
* colons, then that option has an argument that is not required.
* <p>
* Note in this example that the value returned from getopt() is cast to
* a char prior to printing. This is required in order to make the value
* display correctly as a character instead of an integer.
* <p>
* If the first character in the option string is a colon, for example
* ":abc::d", then getopt() will return a ':' instead of a '?' when it
* encounters an option with a missing required argument. This allows the
* caller to distinguish between invalid options and valid options that
* are simply incomplete.
* <p>
* In the traditional Unix getopt(), -1 is returned when the first non-option
* charcter is encountered. In GNU getopt(), the default behavior is to
* allow options to appear anywhere on the command line. The getopt()
* method permutes the argument to make it appear to the caller that all
* options were at the beginning of the command line, and all non-options
* were at the end. For example, calling getopt() with command line args
* of "-a foo bar -d" returns options 'a' and 'd', then sets optind to
* point to "foo". The program would read the last two argv elements as
* "foo" and "bar", just as if the user had typed "-a -d foo bar".
* <p>
* The user can force getopt() to stop scanning the command line with
* the special argument "--" by itself. Any elements occuring before the
* "--" are scanned and permuted as normal. Any elements after the "--"
* are returned as is as non-option argv elements. For example,
* "foo -a -- bar -d" would return option 'a' then -1. optind would point
* to "foo", "bar" and "-d" as the non-option argv elements. The "--"
* is discarded by getopt().
* <p>
* There are two ways this default behavior can be modified. The first is
* to specify traditional Unix getopt() behavior (which is also POSIX
* behavior) in which scanning stops when the first non-option argument
* encountered. (Thus "-a foo bar -d" would return 'a' as an option and
* have "foo", "bar", and "-d" as non-option elements). The second is to
* allow options anywhere, but to return all elements in the order they
* occur on the command line. When a non-option element is ecountered,
* an integer 1 is returned and the value of the non-option element is
* stored in optarg is if it were the argument to that option. For
* example, "-a foo -d", returns first 'a', then 1 (with optarg set to
* "foo") then 'd' then -1. When this "return in order" functionality
* is enabled, the only way to stop getopt() from scanning all command
* line elements is to use the special "--" string by itself as described
* above. An example is "-a foo -b -- bar", which would return 'a', then
* integer 1 with optarg set to "foo", then 'b', then -1. optind would
* then point to "bar" as the first non-option argv element. The "--"
* is discarded.
* <p>
* The POSIX/traditional behavior is enabled by either setting the
* property "gnu.posixly_correct" or by putting a '+' sign as the first
* character of the option string. The difference between the two
* methods is that setting the gnu.posixly_correct property also forces
* certain error messages to be displayed in POSIX format. To enable
* the "return in order" functionality, put a '-' as the first character
* of the option string. Note that after determining the proper
* behavior, Getopt strips this leading '+' or '-', meaning that a ':'
* placed as the second character after one of those two will still cause
* getopt() to return a ':' instead of a '?' if a required option
* argument is missing.
* <p>
* In addition to traditional single character options, GNU Getopt also
* supports long options. These are preceeded by a "--" sequence and
* can be as long as desired. Long options provide a more user-friendly
* way of entering command line options. For example, in addition to a
* "-h" for help, a program could support also "--help".
* <p>
* Like short options, long options can also take a required or non-required
* argument. Required arguments can either be specified by placing an
* equals sign after the option name, then the argument, or by putting the
* argument in the next argv element. For example: "--outputdir=foo" and
* "--outputdir foo" both represent an option of "outputdir" with an
* argument of "foo", assuming that outputdir takes a required argument.
* If a long option takes a non-required argument, then the equals sign
* form must be used to specify the argument. In this case,
* "--outputdir=foo" would represent option outputdir with an argument of
* "foo" while "--outputdir foo" would represent the option outputdir
* with no argument and a first non-option argv element of "foo".
* <p>
* Long options can also be specified using a special POSIX argument
* format (one that I highly discourage). This form of entry is
* enabled by placing a "W;" (yes, 'W' then a semi-colon) in the valid
* option string. This causes getopt to treat the name following the
* "-W" as the name of the long option. For example, "-W outputdir=foo"
* would be equivalent to "--outputdir=foo". The name can immediately
* follow the "-W" like so: "-Woutputdir=foo". Option arguments are
* handled identically to normal long options. If a string follows the
* "-W" that does not represent a valid long option, then getopt() returns
* 'W' and the caller must decide what to do. Otherwise getopt() returns
* a long option value as described below.
* <p>
* While long options offer convenience, they can also be tedious to type
* in full. So it is permissible to abbreviate the option name to as
* few characters as required to uniquely identify it. If the name can
* represent multiple long options, then an error message is printed and
* getopt() returns a '?'.
* <p>
* If an invalid option is specified or a required option argument is
* missing, getopt() prints an error and returns a '?' or ':' exactly
* as for short options. Note that when an invalid long option is
* encountered, the optopt variable is set to integer 0 and so cannot
* be used to identify the incorrect option the user entered.
* <p>
* Long options are defined by LongOpt objects. These objects are created
* with a contructor that takes four params: a String representing the
* object name, a integer specifying what arguments the option takes
* (the value is one of LongOpt.NO_ARGUMENT, LongOpt.REQUIRED_ARGUMENT,
* or LongOpt.OPTIONAL_ARGUMENT), a StringBuffer flag object (described
* below), and an integer value (described below).
* <p>
* To enable long option parsing, create an array of LongOpt's representing
* the legal options and pass it to the Getopt() constructor. WARNING: If
* all elements of the array are not populated with LongOpt objects, the
* getopt() method will throw a NullPointerException.
* <p>
* When getopt() is called and a long option is encountered, one of two
* things can be returned. If the flag field in the LongOpt object
* representing the long option is non-null, then the integer value field
* is stored there and an integer 0 is returned to the caller. The val
* field can then be retrieved from the flag field. Note that since the
* flag field is a StringBuffer, the appropriate String to integer converions
* must be performed in order to get the actual int value stored there.
* If the flag field in the LongOpt object is null, then the value field
* of the LongOpt is returned. This can be the character of a short option.
* This allows an app to have both a long and short option sequence
* (say, "-h" and "--help") that do the exact same thing.
* <p>
* With long options, there is an alternative method of determining
* which option was selected. The method getLongind() will return the
* the index in the long option array (NOT argv) of the long option found.
* So if multiple long options are configured to return the same value,
* the application can use getLongind() to distinguish between them.
* <p>
* Here is an expanded Getopt example using long options and various
* techniques described above:
* <p>
* <pre>
* int c;
* String arg;
* LongOpt[] longopts = new LongOpt[3];
* //
* StringBuffer sb = new StringBuffer();
* longopts[0] = new LongOpt("help", LongOpt.NO_ARGUMENT, null, 'h');
* longopts[1] = new LongOpt("outputdir", LongOpt.REQUIRED_ARGUMENT, sb, 'o');
* longopts[2] = new LongOpt("maximum", LongOpt.OPTIONAL_ARGUMENT, null, 2);
* //
* Getopt g = new Getopt("testprog", argv, "-:bc::d:hW;", longopts);
* g.setOpterr(false); // We'll do our own error handling
* //
* while ((c = g.getopt()) != -1)
* switch (c)
* {
* case 0:
* arg = g.getOptarg();
* System.out.println("Got long option with value '" +
* (char)(new Integer(sb.toString())).intValue()
* + "' with argument " +
* ((arg != null) ? arg : "null"));
* break;
* //
* case 1:
* System.out.println("I see you have return in order set and that " +
* "a non-option argv element was just found " +
* "with the value '" + g.getOptarg() + "'");
* break;
* //
* case 2:
* arg = g.getOptarg();
* System.out.println("I know this, but pretend I didn't");
* System.out.println("We picked option " +
* longopts[g.getLongind()].getName() +
* " with value " +
* ((arg != null) ? arg : "null"));
* break;
* //
* case 'b':
* System.out.println("You picked plain old option " + (char)c);
* break;
* //
* case 'c':
* case 'd':
* arg = g.getOptarg();
* System.out.println("You picked option '" + (char)c +
* "' with argument " +
* ((arg != null) ? arg : "null"));
* break;
* //
* case 'h':
* System.out.println("I see you asked for help");
* break;
* //
* case 'W':
* System.out.println("Hmmm. You tried a -W with an incorrect long " +
* "option name");
* break;
* //
* case ':':
* System.out.println("Doh! You need an argument for option " +
* (char)g.getOptopt());
* break;
* //
* case '?':
* System.out.println("The option '" + (char)g.getOptopt() +
* "' is not valid");
* break;
* //
* default:
* System.out.println("getopt() returned " + c);
* break;
* }
* //
* for (int i = g.getOptind(); i < argv.length ; i++)
* System.out.println("Non option argv element: " + argv[i] + "\n");
* </pre>
* <p>
* There is an alternative form of the constructor used for long options
* above. This takes a trailing boolean flag. If set to false, Getopt
* performs identically to the example, but if the boolean flag is true
* then long options are allowed to start with a single '-' instead of
* "--". If the first character of the option is a valid short option
* character, then the option is treated as if it were the short option.
* Otherwise it behaves as if the option is a long option. Note that
* the name given to this option - long_only - is very counter-intuitive.
* It does not cause only long options to be parsed but instead enables
* the behavior described above.
* <p>
* Note that the functionality and variable names used are driven from
* the C lib version as this object is a port of the C code, not a
* new implementation. This should aid in porting existing C/C++ code,
* as well as helping programmers familiar with the glibc version to
* adapt to the Java version even if it seems very non-Java at times.
* <p>
* In this release I made all instance variables protected due to
* overwhelming public demand. Any code which relied on optarg,
* opterr, optind, or optopt being public will need to be modified to
* use the appropriate access methods.
* <p>
* Please send all bug reports, requests, and comments to
* <a href="mailto:arenn@urbanophile.com">arenn@urbanophile.com</a>.
*
* @version 1.0.7
*
* @author Roland McGrath (roland@gnu.ai.mit.edu)
* @author Ulrich Drepper (drepper@cygnus.com)
* @author Aaron M. Renn (arenn@urbanophile.com)
*
* @see LongOpt
*/
public class Getopt extends Object
{
/**************************************************************************/
/*
* Class Variables
*/
/**
* Describe how to deal with options that follow non-option ARGV-elements.
*
* If the caller did not specify anything,
* the default is REQUIRE_ORDER if the property
* gnu.posixly_correct is defined, PERMUTE otherwise.
*
* The special argument `--' forces an end of option-scanning regardless
* of the value of `ordering'. In the case of RETURN_IN_ORDER, only
* `--' can cause `getopt' to return -1 with `optind' != ARGC.
*
* REQUIRE_ORDER means don't recognize them as options;
* stop option processing when the first non-option is seen.
* This is what Unix does.
* This mode of operation is selected by either setting the property
* gnu.posixly_correct, or using `+' as the first character
* of the list of option characters.
*/
protected static final int REQUIRE_ORDER = 1;
/**
* PERMUTE is the default. We permute the contents of ARGV as we scan,
* so that eventually all the non-options are at the end. This allows options
* to be given in any order, even with programs that were not written to
* expect this.
*/
protected static final int PERMUTE = 2;
/**
* RETURN_IN_ORDER is an option available to programs that were written
* to expect options and other ARGV-elements in any order and that care about
* the ordering of the two. We describe each non-option ARGV-element
* as if it were the argument of an option with character code 1.
* Using `-' as the first character of the list of option characters
* selects this mode of operation.
*/
protected static final int RETURN_IN_ORDER = 3;
/**************************************************************************/
/*
* Instance Variables
*/
/**
* For communication from `getopt' to the caller.
* When `getopt' finds an option that takes an argument,
* the argument value is returned here.
* Also, when `ordering' is RETURN_IN_ORDER,
* each non-option ARGV-element is returned here.
*/
protected String optarg;
/**
* Index in ARGV of the next element to be scanned.
* This is used for communication to and from the caller
* and for communication between successive calls to `getopt'.
*
* On entry to `getopt', zero means this is the first call; initialize.
*
* When `getopt' returns -1, this is the index of the first of the
* non-option elements that the caller should itself scan.
*
* Otherwise, `optind' communicates from one call to the next
* how much of ARGV has been scanned so far.
*/
protected int optind = 0;
/**
* Callers store false here to inhibit the error message
* for unrecognized options.
*/
protected boolean opterr = true;
/**
* When an unrecognized option is encountered, getopt will return a '?'
* and store the value of the invalid option here.
*/
protected int optopt = '?';
/**
* The next char to be scanned in the option-element
* in which the last option character we returned was found.
* This allows us to pick up the scan where we left off.
*
* If this is zero, or a null string, it means resume the scan
* by advancing to the next ARGV-element.
*/
protected String nextchar;
/**
* This is the string describing the valid short options.
*/
protected String optstring;
/**
* This is an array of LongOpt objects which describ the valid long
* options.
*/
protected LongOpt[] long_options;
/**
* This flag determines whether or not we are parsing only long args
*/
protected boolean long_only;
/**
* Stores the index into the long_options array of the long option found
*/
protected int longind;
/**
* The flag determines whether or not we operate in strict POSIX compliance
*/
protected boolean posixly_correct;
/**
* A flag which communicates whether or not checkLongOption() did all
* necessary processing for the current option
*/
protected boolean longopt_handled;
/**
* The index of the first non-option in argv[]
*/
protected int first_nonopt = 1;
/**
* The index of the last non-option in argv[]
*/
protected int last_nonopt = 1;
/**
* Flag to tell getopt to immediately return -1 the next time it is
* called.
*/
private boolean endparse = false;
/**
* Saved argument list passed to the program
*/
protected String[] argv;
/**
* Determines whether we permute arguments or not
*/
protected int ordering;
/**
* Name to print as the program name in error messages. This is necessary
* since Java does not place the program name in argv[0]
*/
protected String progname;
/**
* The localized strings are kept in a separate file
*/
private ResourceBundle _messages = ResourceBundle.getBundle(
"gnu/getopt/MessagesBundle", Locale.getDefault());
/**************************************************************************/
/*
* Constructors
*/
/**
* Construct a basic Getopt instance with the given input data. Note that
* this handles "short" options only.
*
* @param progname The name to display as the program name when printing errors
* @param argv The String array passed as the command line to the program.
* @param optstring A String containing a description of the valid args for this program
*/
public
Getopt(String progname, String[] argv, String optstring)
{
this(progname, argv, optstring, null, false);
}
/**************************************************************************/
/**
* Construct a Getopt instance with given input data that is capable of
* parsing long options as well as short.
*
* @param progname The name to display as the program name when printing errors
* @param argv The String array passed as the command ilne to the program
* @param optstring A String containing a description of the valid short args for this program
* @param long_options An array of LongOpt objects that describes the valid long args for this program
*/
public
Getopt(String progname, String[] argv, String optstring,
LongOpt[] long_options)
{
this(progname, argv, optstring, long_options, false);
}
/**************************************************************************/
/**
* Construct a Getopt instance with given input data that is capable of
* parsing long options and short options. Contrary to what you might
* think, the flag 'long_only' does not determine whether or not we
* scan for only long arguments. Instead, a value of true here allows
* long arguments to start with a '-' instead of '--' unless there is a
* conflict with a short option name.
*
* @param progname The name to display as the program name when printing errors
* @param argv The String array passed as the command ilne to the program
* @param optstring A String containing a description of the valid short args for this program
* @param long_options An array of LongOpt objects that describes the valid long args for this program
* @param long_only true if long options that do not conflict with short options can start with a '-' as well as '--'
*/
public
Getopt(String progname, String[] argv, String optstring,
LongOpt[] long_options, boolean long_only)
{
if (optstring.length() == 0)
optstring = " ";
// This function is essentially _getopt_initialize from GNU getopt
this.progname = progname;
this.argv = argv;
this.optstring = optstring;
this.long_options = long_options;
this.long_only = long_only;
// Check for property "gnu.posixly_correct" to determine whether to
// strictly follow the POSIX standard. This replaces the "POSIXLY_CORRECT"
// environment variable in the C version
if (System.getProperty("gnu.posixly_correct", null) == null)
posixly_correct = false;
else
{
posixly_correct = true;
_messages = ResourceBundle.getBundle("gnu/getopt/MessagesBundle",
Locale.US);
}
// Determine how to handle the ordering of options and non-options
if (optstring.charAt(0) == '-')
{
ordering = RETURN_IN_ORDER;
if (optstring.length() > 1)
this.optstring = optstring.substring(1);
}
else if (optstring.charAt(0) == '+')
{
ordering = REQUIRE_ORDER;
if (optstring.length() > 1)
this.optstring = optstring.substring(1);
}
else if (posixly_correct)
{
ordering = REQUIRE_ORDER;
}
else
{
ordering = PERMUTE; // The normal default case
}
}
/**************************************************************************/
/*
* Instance Methods
*/
/**
* In GNU getopt, it is possible to change the string containg valid options
* on the fly because it is passed as an argument to getopt() each time. In
* this version we do not pass the string on every call. In order to allow
* dynamic option string changing, this method is provided.
*
* @param optstring The new option string to use
*/
public void
setOptstring(String optstring)
{
if (optstring.length() == 0)
optstring = " ";
this.optstring = optstring;
}
/**************************************************************************/
/**
* optind it the index in ARGV of the next element to be scanned.
* This is used for communication to and from the caller
* and for communication between successive calls to `getopt'.
*
* When `getopt' returns -1, this is the index of the first of the
* non-option elements that the caller should itself scan.
*
* Otherwise, `optind' communicates from one call to the next
* how much of ARGV has been scanned so far.
*/
public int
getOptind()
{
return(optind);
}
/**************************************************************************/
/**
* This method allows the optind index to be set manually. Normally this
* is not necessary (and incorrect usage of this method can lead to serious
* lossage), but optind is a public symbol in GNU getopt, so this method
* was added to allow it to be modified by the caller if desired.
*
* @param optind The new value of optind
*/
public void
setOptind(int optind)
{
this.optind = optind;
}
/**************************************************************************/
/**
* Since in GNU getopt() the argument vector is passed back in to the
* function every time, the caller can swap out argv on the fly. Since
* passing argv is not required in the Java version, this method allows
* the user to override argv. Note that incorrect use of this method can
* lead to serious lossage.
*
* @param argv New argument list
*/
public void
setArgv(String[] argv)
{
this.argv = argv;
}
/**************************************************************************/
/**
* For communication from `getopt' to the caller.
* When `getopt' finds an option that takes an argument,
* the argument value is returned here.
* Also, when `ordering' is RETURN_IN_ORDER,
* each non-option ARGV-element is returned here.
* No set method is provided because setting this variable has no effect.
*/
public String
getOptarg()
{
return(optarg);
}
/**************************************************************************/
/**
* Normally Getopt will print a message to the standard error when an
* invalid option is encountered. This can be suppressed (or re-enabled)
* by calling this method. There is no get method for this variable
* because if you can't remember the state you set this to, why should I?
*/
public void
setOpterr(boolean opterr)
{
this.opterr = opterr;
}
/**************************************************************************/
/**
* When getopt() encounters an invalid option, it stores the value of that
* option in optopt which can be retrieved with this method. There is
* no corresponding set method because setting this variable has no effect.
*/
public int
getOptopt()
{
return(optopt);
}
/**************************************************************************/
/**
* Returns the index into the array of long options (NOT argv) representing
* the long option that was found.
*/
public int
getLongind()
{
return(longind);
}
/**************************************************************************/
/**
* Exchange the shorter segment with the far end of the longer segment.
* That puts the shorter segment into the right place.
* It leaves the longer segment in the right place overall,
* but it consists of two parts that need to be swapped next.
* This method is used by getopt() for argument permutation.
*/
protected void
exchange(String[] argv)
{
int bottom = first_nonopt;
int middle = last_nonopt;
int top = optind;
String tem;
while (top > middle && middle > bottom)
{
if (top - middle > middle - bottom)
{
// Bottom segment is the short one.
int len = middle - bottom;
int i;
// Swap it with the top part of the top segment.
for (i = 0; i < len; i++)
{
tem = argv[bottom + i];
argv[bottom + i] = argv[top - (middle - bottom) + i];
argv[top - (middle - bottom) + i] = tem;
}
// Exclude the moved bottom segment from further swapping.
top -= len;
}
else
{
// Top segment is the short one.
int len = top - middle;
int i;
// Swap it with the bottom part of the bottom segment.
for (i = 0; i < len; i++)
{
tem = argv[bottom + i];
argv[bottom + i] = argv[middle + i];
argv[middle + i] = tem;
}
// Exclude the moved top segment from further swapping.
bottom += len;
}
}
// Update records for the slots the non-options now occupy.
first_nonopt += (optind - last_nonopt);
last_nonopt = optind;
}
/**************************************************************************/
/**
* Check to see if an option is a valid long option. Called by getopt().
* Put in a separate method because this needs to be done twice. (The
* C getopt authors just copy-pasted the code!).
*
* @param longind A buffer in which to store the 'val' field of found LongOpt
*
* @return Various things depending on circumstances
*/
protected int
checkLongOption()
{
LongOpt pfound = null;
int nameend;
boolean ambig;
boolean exact;
longopt_handled = true;
ambig = false;
exact = false;
longind = -1;
nameend = nextchar.indexOf("=");
if (nameend == -1)
nameend = nextchar.length();
// Test all lnog options for either exact match or abbreviated matches
for (int i = 0; i < long_options.length; i++)
{
if (long_options[i].getName().startsWith(nextchar.substring(0, nameend)))
{
if (long_options[i].getName().equals(nextchar.substring(0, nameend)))
{
// Exact match found
pfound = long_options[i];
longind = i;
exact = true;
break;
}
else if (pfound == null)
{
// First nonexact match found
pfound = long_options[i];
longind = i;
}
else
{
// Second or later nonexact match found
ambig = true;
}
}
} // for
// Print out an error if the option specified was ambiguous
if (ambig && !exact)
{
if (opterr)
{
Object[] msgArgs = { progname, argv[optind] };
System.err.println(MessageFormat.format(
_messages.getString("getopt.ambigious"),
msgArgs));
}
nextchar = "";
optopt = 0;
++optind;
return('?');
}
if (pfound != null)
{
++optind;
if (nameend != nextchar.length())
{
if (pfound.has_arg != LongOpt.NO_ARGUMENT)
{
if (nextchar.substring(nameend).length() > 1)
optarg = nextchar.substring(nameend+1);
else
optarg = "";
}
else
{
if (opterr)
{
// -- option
if (argv[optind - 1].startsWith("--"))
{
Object[] msgArgs = { progname, pfound.name };
System.err.println(MessageFormat.format(
_messages.getString("getopt.arguments1"),
msgArgs));
}
// +option or -option
else
{
Object[] msgArgs = { progname, new
Character(argv[optind-1].charAt(0)).toString(),
pfound.name };
System.err.println(MessageFormat.format(
_messages.getString("getopt.arguments2"),
msgArgs));
}
}
nextchar = "";
optopt = pfound.val;
return('?');
}
} // if (nameend)
else if (pfound.has_arg == LongOpt.REQUIRED_ARGUMENT)
{
if (optind < argv.length)
{
optarg = argv[optind];
++optind;
}
else
{
if (opterr)
{
Object[] msgArgs = { progname, argv[optind-1] };
System.err.println(MessageFormat.format(
_messages.getString("getopt.requires"),
msgArgs));
}
nextchar = "";
optopt = pfound.val;
if (optstring.charAt(0) == ':')
return(':');
else
return('?');
}
} // else if (pfound)
nextchar = "";
if (pfound.flag != null)
{
pfound.flag.setLength(0);
pfound.flag.append(pfound.val);
return(0);
}
return(pfound.val);
} // if (pfound != null)
longopt_handled = false;
return(0);
}
/**************************************************************************/
/**
* This method returns a char that is the current option that has been
* parsed from the command line. If the option takes an argument, then
* the internal variable 'optarg' is set which is a String representing
* the the value of the argument. This value can be retrieved by the
* caller using the getOptarg() method. If an invalid option is found,
* an error message is printed and a '?' is returned. The name of the
* invalid option character can be retrieved by calling the getOptopt()
* method. When there are no more options to be scanned, this method
* returns -1. The index of first non-option element in argv can be
* retrieved with the getOptind() method.
*
* @return Various things as described above
*/
public int
getopt()
{
optarg = null;
if (endparse == true)
return(-1);
if ((nextchar == null) || (nextchar.equals("")))
{
// If we have just processed some options following some non-options,
// exchange them so that the options come first.
if (last_nonopt > optind)
last_nonopt = optind;
if (first_nonopt > optind)
first_nonopt = optind;
if (ordering == PERMUTE)
{
// If we have just processed some options following some non-options,
// exchange them so that the options come first.
if ((first_nonopt != last_nonopt) && (last_nonopt != optind))
exchange(argv);
else if (last_nonopt != optind)
first_nonopt = optind;
// Skip any additional non-options
// and extend the range of non-options previously skipped.
while ((optind < argv.length) && (argv[optind].equals("") ||
(argv[optind].charAt(0) != '-') || argv[optind].equals("-")))
{
optind++;
}
last_nonopt = optind;
}
// The special ARGV-element `--' means premature end of options.
// Skip it like a null option,
// then exchange with previous non-options as if it were an option,
// then skip everything else like a non-option.
if ((optind != argv.length) && argv[optind].equals("--"))
{
optind++;
if ((first_nonopt != last_nonopt) && (last_nonopt != optind))
exchange (argv);
else if (first_nonopt == last_nonopt)
first_nonopt = optind;
last_nonopt = argv.length;
optind = argv.length;
}
// If we have done all the ARGV-elements, stop the scan
// and back over any non-options that we skipped and permuted.
if (optind == argv.length)
{
// Set the next-arg-index to point at the non-options
// that we previously skipped, so the caller will digest them.
if (first_nonopt != last_nonopt)
optind = first_nonopt;
return(-1);
}
// If we have come to a non-option and did not permute it,
// either stop the scan or describe it to the caller and pass it by.
if (argv[optind].equals("") || (argv[optind].charAt(0) != '-') ||
argv[optind].equals("-"))
{
if (ordering == REQUIRE_ORDER)
return(-1);
optarg = argv[optind++];
return(1);
}
// We have found another option-ARGV-element.
// Skip the initial punctuation.
if (argv[optind].startsWith("--"))
nextchar = argv[optind].substring(2);
else
nextchar = argv[optind].substring(1);
}
// Decode the current option-ARGV-element.
/* Check whether the ARGV-element is a long option.
If long_only and the ARGV-element has the form "-f", where f is
a valid short option, don't consider it an abbreviated form of
a long option that starts with f. Otherwise there would be no
way to give the -f short option.
On the other hand, if there's a long option "fubar" and
the ARGV-element is "-fu", do consider that an abbreviation of
the long option, just like "--fu", and not "-f" with arg "u".
This distinction seems to be the most useful approach. */
if ((long_options != null) && (argv[optind].startsWith("--")
|| (long_only && ((argv[optind].length() > 2) ||
(optstring.indexOf(argv[optind].charAt(1)) == -1)))))
{
int c = checkLongOption();
if (longopt_handled)
return(c);
// Can't find it as a long option. If this is not getopt_long_only,
// or the option starts with '--' or is not a valid short
// option, then it's an error.
// Otherwise interpret it as a short option.
if (!long_only || argv[optind].startsWith("--")
|| (optstring.indexOf(nextchar.charAt(0)) == -1))
{
if (opterr)
{
if (argv[optind].startsWith("--"))
{
Object[] msgArgs = { progname, nextchar };
System.err.println(MessageFormat.format(
_messages.getString("getopt.unrecognized"),
msgArgs));
}
else
{
Object[] msgArgs = { progname, new
Character(argv[optind].charAt(0)).toString(),
nextchar };
System.err.println(MessageFormat.format(
_messages.getString("getopt.unrecognized2"),
msgArgs));
}
}
nextchar = "";
++optind;
optopt = 0;
return('?');
}
} // if (longopts)
// Look at and handle the next short option-character */
int c = nextchar.charAt(0); //**** Do we need to check for empty str?
if (nextchar.length() > 1)
nextchar = nextchar.substring(1);
else
nextchar = "";
String temp = null;
if (optstring.indexOf(c) != -1)
temp = optstring.substring(optstring.indexOf(c));
if (nextchar.equals(""))
++optind;
if ((temp == null) || (c == ':'))
{
if (opterr)
{
if (posixly_correct)
{
// 1003.2 specifies the format of this message
Object[] msgArgs = { progname, new
Character((char)c).toString() };
System.err.println(MessageFormat.format(
_messages.getString("getopt.illegal"), msgArgs));
}
else
{
Object[] msgArgs = { progname, new
Character((char)c).toString() };
System.err.println(MessageFormat.format(
_messages.getString("getopt.invalid"), msgArgs));
}
}
optopt = c;
return('?');
}
// Convenience. Treat POSIX -W foo same as long option --foo
if ((temp.charAt(0) == 'W') && (temp.length() > 1) && (temp.charAt(1) == ';'))
{
if (!nextchar.equals(""))
{
optarg = nextchar;
}
// No further cars in this argv element and no more argv elements
else if (optind == argv.length)
{
if (opterr)
{
// 1003.2 specifies the format of this message.
Object[] msgArgs = { progname, new
Character((char)c).toString() };
System.err.println(MessageFormat.format(
_messages.getString("getopt.requires2"), msgArgs));
}
optopt = c;
if (optstring.charAt(0) == ':')
return(':');
else
return('?');
}
else
{
// We already incremented `optind' once;
// increment it again when taking next ARGV-elt as argument.
nextchar = argv[optind];
optarg = argv[optind];
}
c = checkLongOption();
if (longopt_handled)
return(c);
else
// Let the application handle it
{
nextchar = null;
++optind;
return('W');
}
}
if ((temp.length() > 1) && (temp.charAt(1) == ':'))
{
if ((temp.length() > 2) && (temp.charAt(2) == ':'))
// This is an option that accepts and argument optionally
{
if (!nextchar.equals(""))
{
optarg = nextchar;
++optind;
}
else
{
optarg = null;
}
nextchar = null;
}
else
{
if (!nextchar.equals(""))
{
optarg = nextchar;
++optind;
}
else if (optind == argv.length)
{
if (opterr)
{
// 1003.2 specifies the format of this message
Object[] msgArgs = { progname, new
Character((char)c).toString() };
System.err.println(MessageFormat.format(
_messages.getString("getopt.requires2"), msgArgs));
}
optopt = c;
if (optstring.charAt(0) == ':')
return(':');
else
return('?');
}
else
{
optarg = argv[optind];
++optind;
// Ok, here's an obscure Posix case. If we have o:, and
// we get -o -- foo, then we're supposed to skip the --,
// end parsing of options, and make foo an operand to -o.
// Only do this in Posix mode.
if ((posixly_correct) && optarg.equals("--"))
{
// If end of argv, error out
if (optind == argv.length)
{
if (opterr)
{
// 1003.2 specifies the format of this message
Object[] msgArgs = { progname, new
Character((char)c).toString() };
System.err.println(MessageFormat.format(
_messages.getString("getopt.requires2"), msgArgs));
}
optopt = c;
if (optstring.charAt(0) == ':')
return(':');
else
return('?');
}
// Set new optarg and set to end
// Don't permute as we do on -- up above since we
// know we aren't in permute mode because of Posix.
optarg = argv[optind];
++optind;
first_nonopt = optind;
last_nonopt = argv.length;
endparse = true;
}
}
nextchar = null;
}
}
return(c);
}
} // Class Getopt
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