DDGetoptLongParser.m from redshed at Krugle
Show DDGetoptLongParser.m syntax highlighted
/*
* Copyright (c) 2007 Dave Dribin
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#import "DDGetoptLongParser.h"
#import "DDCliUtil.h"
@interface DDGetoptLongParser (Private)
- (NSString *) optionToKey: (NSString *) option;
- (struct option *) firstOption;
- (struct option *) currentOption;
- (void) addOption;
- (NSString *) errorOption: (NSString *) option;
- (void) handleMissingArgument: (NSString *) option
command: (NSString *) command;
- (void) handleArgumentNotRecognized: (NSString *) option
command: (NSString *) command;
@end
@implementation DDGetoptLongParser
+ (DDGetoptLongParser *) optionsWithTarget: (id) target;
{
return [[[self alloc] initWithTarget: target] autorelease];
}
- (id) initWithTarget: (id) target;
{
self = [super init];
if (self == nil)
return nil;
mTarget = target;
// Non-single char options start after as the last ASCII character
mNextShortOption = 256;
mOptionsData = [[NSMutableData alloc] initWithLength: sizeof(struct option)];
mCurrentOption = 0;
mUtf8Data = [[NSMutableArray alloc] init];
mOptionString = [[NSMutableString alloc] init];
[mOptionString appendString: @":"];
mOptionInfoMap = [[NSMutableDictionary alloc] init];
mGetoptFunction = getopt_long;
return self;
}
- (void) setGetoptLongOnly: (BOOL) getoptLongOnly;
{
if (getoptLongOnly)
mGetoptFunction = getopt_long_only;
else
mGetoptFunction = getopt_long;
}
- (void) addOptionsFromTable: (DDGetoptOption *) optionTable;
{
DDGetoptOption * currentOption = optionTable;
while ((currentOption->longOption != nil) ||
(currentOption->shortOption != 0))
{
[self addLongOption: currentOption->longOption
shortOption: currentOption->shortOption
key: [self optionToKey: currentOption->longOption]
argumentOptions: currentOption->argumentOptions];
currentOption++;
}
}
- (void) addLongOption: (NSString *) longOption
shortOption: (char) shortOption
key: (NSString *) key
argumentOptions: (DDGetoptArgumentOptions) argumentOptions;
{
const char * utf8String = [longOption UTF8String];
NSData * utf8Data = [NSData dataWithBytes: utf8String length: strlen(utf8String)];
struct option * option = [self currentOption];
option->name = utf8String;
option->has_arg = argumentOptions;
option->flag = NULL;
int shortOptionValue;
if (shortOption != 0)
{
shortOptionValue = shortOption;
option->val = shortOption;
if (argumentOptions == DDGetoptRequiredArgument)
[mOptionString appendFormat: @"%c:", shortOption];
else if (argumentOptions == DDGetoptOptionalArgument)
[mOptionString appendFormat: @"%c::", shortOption];
else
[mOptionString appendFormat: @"%c", shortOption];
}
else
{
shortOptionValue = mNextShortOption;
mNextShortOption++;
option->val = shortOptionValue;
}
[self addOption];
NSArray * optionInfo = [NSArray arrayWithObjects:
key, [NSNumber numberWithInt: argumentOptions], nil];
[mOptionInfoMap setObject: optionInfo
forKey: [NSNumber numberWithInt: shortOptionValue]];
[mUtf8Data addObject: utf8Data];
}
- (void) addLongOption: (NSString *) longOption
key: (NSString *) key
argumentOptions: (DDGetoptArgumentOptions) argumentOptions;
{
[self addLongOption: longOption shortOption: 0
key: key argumentOptions: argumentOptions];
}
- (NSArray *) parseOptions;
{
NSProcessInfo * processInfo = [NSProcessInfo processInfo];
NSArray * arguments = [processInfo arguments];
NSString * command = [processInfo processName];
return [self parseOptionsWithArguments: arguments command: command];
}
- (NSArray *) parseOptionsWithArguments: (NSArray *) arguments
command: (NSString *) command;
{
int argc = [arguments count];
char ** argv = alloca(sizeof(char *) * argc);
int i;
for (i = 0; i < argc; i++)
{
NSString * argument = [arguments objectAtIndex: i];
argv[i] = (char *) [argument UTF8String];
}
argv[i] = 0;
// Make sure list is NULL terminated
struct option * option = [self currentOption];
option->name = NULL;
option->has_arg = 0;
option->flag = NULL;
option->val = 0;
const char * optionString = [mOptionString UTF8String];
struct option * options = [self firstOption];
int ch;
opterr = 1;
int longOptionIndex = -1;
while ((ch = mGetoptFunction(argc, argv, optionString, options, &longOptionIndex)) != -1)
{
NSString * last_argv = [NSString stringWithUTF8String: argv[optind-1]];
if (ch == ':')
{
[self handleMissingArgument: last_argv command: command];
return nil;
}
else if (ch == '?')
{
[self handleArgumentNotRecognized: last_argv command: command];
return nil;
}
NSString * nsoptarg = nil;
if (optarg != NULL)
nsoptarg = [NSString stringWithUTF8String: optarg];
NSArray * optionInfo = [mOptionInfoMap objectForKey: [NSNumber numberWithInt: ch]];
NSAssert(optionInfo != nil, @"optionInfo should not be nil");
if (optionInfo != nil)
{
NSString * key = [optionInfo objectAtIndex: 0];
int argumentOptions = [[optionInfo objectAtIndex: 1] intValue];
if (argumentOptions == DDGetoptNoArgument)
[mTarget setValue: [NSNumber numberWithBool: YES] forKey: key];
else
[mTarget setValue: nsoptarg forKey: key];
}
}
NSRange range = NSMakeRange(optind, argc - optind);
return [arguments subarrayWithRange: range];
}
@end
@implementation DDGetoptLongParser (Private)
- (NSString *) optionToKey: (NSString *) option;
{
NSScanner * scanner = [NSScanner scannerWithString: option];
[scanner setCharactersToBeSkipped: [NSCharacterSet characterSetWithCharactersInString: @"-"]];
NSMutableString * key = [NSMutableString string];
NSString * string = nil;
BOOL caps = NO;
while ([scanner scanUpToString: @"-" intoString: &string])
{
if (caps)
string = [string capitalizedString];
[key appendString: string];
caps = YES;
}
return key;
}
- (struct option *) firstOption;
{
struct option * options = [mOptionsData mutableBytes];
return options;
}
- (struct option *) currentOption;
{
struct option * options = [mOptionsData mutableBytes];
return &options[mCurrentOption];
}
- (void) addOption;
{
[mOptionsData increaseLengthBy: sizeof(struct option)];
mCurrentOption++;
}
- (NSString *) errorOption: (NSString *) option;
{
if (![option hasPrefix: @"-"])
return [NSString stringWithFormat: @"%c", optopt];
else
return option;
}
- (void) handleMissingArgument: (NSString *) option
command: (NSString *) command;
{
option = [self errorOption: option];
if ([mTarget respondsToSelector: @selector(optionIsMissingArgument:)])
{
[mTarget optionIsMissingArgument: option];
}
else
{
ddfprintf(stderr, @"%@: option `%@' requires an argument\n",
command, option);
ddfprintf(stderr, @"Try `%@ --help` for more information.\n", command);
}
}
- (void) handleArgumentNotRecognized: (NSString *) option
command: (NSString *) command;
{
option = [self errorOption: option];
if ([mTarget respondsToSelector: @selector(optionIsNotRecognized:)])
{
[mTarget optionIsNotRecognized: option];
}
else
{
ddfprintf(stderr, @"%@: unrecognized option `%@'\n",
command, option);
ddfprintf(stderr, @"Try `%@ --help` for more information.\n", command);
}
}
@end
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