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anyoption.cpp
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anyoption.cpp
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/*
* AnyOption 1.3
*
* kishan at hackorama dot com www.hackorama.com JULY 2001
*
* + Acts as a common facade class for reading
* commandline options as well as options from
* an optionfile with delimited type value pairs
*
* + Handles the POSIX style single character options ( -w )
* as well as the newer GNU long options ( --width )
*
* + The option file assumes the traditional format of
* first character based comment lines and type value
* pairs with a delimiter , and flags which are not pairs
*
* # this is a coment
* # next line is an option value pair
* width : 100
* # next line is a flag
* noimages
*
* + Supports printing out Help and Usage
*
* + Why not just use getopt() ?
*
* getopt() Its a POSIX standard not part of ANSI-C.
* So it may not be available on platforms like Windows.
*
* + Why it is so long ?
*
* The actual code which does command line parsing
* and option file parsing are done in few methods.
* Most of the extra code are for providing a flexible
* common public interface to both a resourcefile and
* and command line supporting POSIX style and
* GNU long option as well as mixing of both.
*
* + Please see "anyoption.h" for public method descriptions
*
*/
/* Updated Auguest 2004
* Fix from Michael D Peters (mpeters at sandia.gov)
* to remove static local variables, allowing multiple instantiations
* of the reader (for using multiple configuration files). There is
* an error in the destructor when using multiple instances, so you
* cannot delete your objects (it will crash), but not calling the
* destructor only introduces a small memory leak, so I
* have not bothered tracking it down.
*
* Also updated to use modern C++ style headers, rather than
* depricated iostream.h (it was causing my compiler problems)
*/
/*
* Updated September 2006
* Fix from Boyan Asenov for a bug in mixing up option indexes
* leading to exception when mixing different options types
*/
#include "anyoption.h"
AnyOption::AnyOption()
{
init();
}
AnyOption::AnyOption(int maxopt)
{
init( maxopt , maxopt );
}
AnyOption::AnyOption(int maxopt, int maxcharopt)
{
init( maxopt , maxcharopt );
}
AnyOption::~AnyOption()
{
if( mem_allocated )
cleanup();
}
void
AnyOption::init()
{
init( DEFAULT_MAXOPTS , DEFAULT_MAXOPTS );
}
void
AnyOption::init(int maxopt, int maxcharopt )
{
max_options = maxopt;
max_char_options = maxcharopt;
max_usage_lines = DEFAULT_MAXUSAGE;
usage_lines = 0 ;
argc = 0;
argv = NULL;
posix_style = true;
verbose = false;
filename = NULL;
appname = NULL;
option_counter = 0;
optchar_counter = 0;
new_argv = NULL;
new_argc = 0 ;
max_legal_args = 0 ;
command_set = false;
file_set = false;
values = NULL;
g_value_counter = 0;
mem_allocated = false;
command_set = false;
file_set = false;
opt_prefix_char = '-';
file_delimiter_char = ':';
file_comment_char = '#';
equalsign = '=';
comment = '#' ;
delimiter = ':' ;
endofline = '\n';
whitespace = ' ' ;
nullterminate = '\0';
set = false;
once = true;
hasoptions = false;
autousage = false;
strcpy_s( long_opt_prefix , "--" );
if( alloc() == false ){
cout << endl << "OPTIONS ERROR : Failed allocating memory" ;
cout << endl ;
cout << "Exiting." << endl ;
exit (0);
}
}
bool
AnyOption::alloc()
{
int i = 0 ;
int size = 0 ;
if( mem_allocated )
return true;
size = (max_options+1) * sizeof(const char*);
options = (const char**)malloc( size );
optiontype = (int*) malloc( (max_options+1)*sizeof(int) );
optionindex = (int*) malloc( (max_options+1)*sizeof(int) );
if( options == NULL || optiontype == NULL || optionindex == NULL )
return false;
else
mem_allocated = true;
for( i = 0 ; i < max_options ; i++ ){
options[i] = NULL;
optiontype[i] = 0 ;
optionindex[i] = -1 ;
}
optionchars = (char*) malloc( (max_char_options+1)*sizeof(char) );
optchartype = (int*) malloc( (max_char_options+1)*sizeof(int) );
optcharindex = (int*) malloc( (max_char_options+1)*sizeof(int) );
if( optionchars == NULL ||
optchartype == NULL ||
optcharindex == NULL )
{
mem_allocated = false;
return false;
}
for( i = 0 ; i < max_char_options ; i++ ){
optionchars[i] = '0';
optchartype[i] = 0 ;
optcharindex[i] = -1 ;
}
size = (max_usage_lines+1) * sizeof(const char*) ;
usage = (const char**) malloc( size );
if( usage == NULL ){
mem_allocated = false;
return false;
}
for( i = 0 ; i < max_usage_lines ; i++ )
usage[i] = NULL;
return true;
}
bool
AnyOption::doubleOptStorage()
{
options = (const char**)realloc( options,
((2*max_options)+1) * sizeof( const char*) );
optiontype = (int*) realloc( optiontype ,
((2 * max_options)+1)* sizeof(int) );
optionindex = (int*) realloc( optionindex,
((2 * max_options)+1) * sizeof(int) );
if( options == NULL || optiontype == NULL || optionindex == NULL )
return false;
/* init new storage */
for( int i = max_options ; i < 2*max_options ; i++ ){
options[i] = NULL;
optiontype[i] = 0 ;
optionindex[i] = -1 ;
}
max_options = 2 * max_options ;
return true;
}
bool
AnyOption::doubleCharStorage()
{
optionchars = (char*) realloc( optionchars,
((2*max_char_options)+1)*sizeof(char) );
optchartype = (int*) realloc( optchartype,
((2*max_char_options)+1)*sizeof(int) );
optcharindex = (int*) realloc( optcharindex,
((2*max_char_options)+1)*sizeof(int) );
if( optionchars == NULL ||
optchartype == NULL ||
optcharindex == NULL )
return false;
/* init new storage */
for( int i = max_char_options ; i < 2*max_char_options ; i++ ){
optionchars[i] = '0';
optchartype[i] = 0 ;
optcharindex[i] = -1 ;
}
max_char_options = 2 * max_char_options;
return true;
}
bool
AnyOption::doubleUsageStorage()
{
usage = (const char**)realloc( usage,
((2*max_usage_lines)+1) * sizeof( const char*) );
if ( usage == NULL )
return false;
for( int i = max_usage_lines ; i < 2*max_usage_lines ; i++ )
usage[i] = NULL;
max_usage_lines = 2 * max_usage_lines ;
return true;
}
void
AnyOption::cleanup()
{
free (options);
free (optiontype);
free (optionindex);
free (optionchars);
free (optchartype);
free (optcharindex);
free (usage);
if( values != NULL )
free (values);
if( new_argv != NULL )
free (new_argv);
}
void
AnyOption::setCommandPrefixChar( char _prefix )
{
opt_prefix_char = _prefix;
}
void
AnyOption::setCommandLongPrefix( char *_prefix )
{
if( strlen( _prefix ) > MAX_LONG_PREFIX_LENGTH ){
*( _prefix + MAX_LONG_PREFIX_LENGTH ) = '\0';
}
strcpy_s (long_opt_prefix, _prefix);
}
void
AnyOption::setFileCommentChar( char _comment )
{
file_delimiter_char = _comment;
}
void
AnyOption::setFileDelimiterChar( char _delimiter )
{
file_comment_char = _delimiter ;
}
bool
AnyOption::CommandSet()
{
return( command_set );
}
bool
AnyOption::FileSet()
{
return( file_set );
}
void
AnyOption::noPOSIX()
{
posix_style = false;
}
bool
AnyOption::POSIX()
{
return posix_style;
}
void
AnyOption::setVerbose()
{
verbose = true ;
}
void
AnyOption::printVerbose()
{
if( verbose )
cout << endl ;
}
void
AnyOption::printVerbose( const char *msg )
{
if( verbose )
cout << msg ;
}
void
AnyOption::printVerbose( char *msg )
{
if( verbose )
cout << msg ;
}
void
AnyOption::printVerbose( char ch )
{
if( verbose )
cout << ch ;
}
bool
AnyOption::hasOptions()
{
return hasoptions;
}
void
AnyOption::autoUsagePrint(bool _autousage)
{
autousage = _autousage;
}
void
AnyOption::useCommandArgs( int _argc, char **_argv )
{
argc = _argc;
argv = _argv;
command_set = true;
appname = argv[0];
if(argc > 1) hasoptions = true;
}
void
AnyOption::useFiileName( const char *_filename )
{
filename = _filename;
file_set = true;
}
/*
* set methods for options
*/
void
AnyOption::setCommandOption( const char *opt )
{
addOption( opt , COMMAND_OPT );
g_value_counter++;
}
void
AnyOption::setCommandOption( char opt )
{
addOption( opt , COMMAND_OPT );
g_value_counter++;
}
void
AnyOption::setCommandOption( const char *opt , char optchar )
{
addOption( opt , COMMAND_OPT );
addOption( optchar , COMMAND_OPT );
g_value_counter++;
}
void
AnyOption::setCommandFlag( const char *opt )
{
addOption( opt , COMMAND_FLAG );
g_value_counter++;
}
void
AnyOption::setCommandFlag( char opt )
{
addOption( opt , COMMAND_FLAG );
g_value_counter++;
}
void
AnyOption::setCommandFlag( const char *opt , char optchar )
{
addOption( opt , COMMAND_FLAG );
addOption( optchar , COMMAND_FLAG );
g_value_counter++;
}
void
AnyOption::setFileOption( const char *opt )
{
addOption( opt , FILE_OPT );
g_value_counter++;
}
void
AnyOption::setFileOption( char opt )
{
addOption( opt , FILE_OPT );
g_value_counter++;
}
void
AnyOption::setFileOption( const char *opt , char optchar )
{
addOption( opt , FILE_OPT );
addOption( optchar, FILE_OPT );
g_value_counter++;
}
void
AnyOption::setFileFlag( const char *opt )
{
addOption( opt , FILE_FLAG );
g_value_counter++;
}
void
AnyOption::setFileFlag( char opt )
{
addOption( opt , FILE_FLAG );
g_value_counter++;
}
void
AnyOption::setFileFlag( const char *opt , char optchar )
{
addOption( opt , FILE_FLAG );
addOption( optchar , FILE_FLAG );
g_value_counter++;
}
void
AnyOption::setOption( const char *opt )
{
addOption( opt , COMMON_OPT );
g_value_counter++;
}
void
AnyOption::setOption( char opt )
{
addOption( opt , COMMON_OPT );
g_value_counter++;
}
void
AnyOption::setOption( const char *opt , char optchar )
{
addOption( opt , COMMON_OPT );
addOption( optchar , COMMON_OPT );
g_value_counter++;
}
void
AnyOption::setFlag( const char *opt )
{
addOption( opt , COMMON_FLAG );
g_value_counter++;
}
void
AnyOption::setFlag( const char opt )
{
addOption( opt , COMMON_FLAG );
g_value_counter++;
}
void
AnyOption::setFlag( const char *opt , char optchar )
{
addOption( opt , COMMON_FLAG );
addOption( optchar , COMMON_FLAG );
g_value_counter++;
}
void
AnyOption::addOption( const char *opt, int type )
{
if( option_counter >= max_options ){
if( doubleOptStorage() == false ){
addOptionError( opt );
return;
}
}
options[ option_counter ] = opt ;
optiontype[ option_counter ] = type ;
optionindex[ option_counter ] = g_value_counter;
option_counter++;
}
void
AnyOption::addOption( char opt, int type )
{
if( !POSIX() ){
printVerbose("Ignoring the option character \"");
printVerbose( opt );
printVerbose( "\" ( POSIX options are turned off )" );
printVerbose();
return;
}
if( optchar_counter >= max_char_options ){
if( doubleCharStorage() == false ){
addOptionError( opt );
return;
}
}
optionchars[ optchar_counter ] = opt ;
optchartype[ optchar_counter ] = type ;
optcharindex[ optchar_counter ] = g_value_counter;
optchar_counter++;
}
void
AnyOption::addOptionError( const char *opt )
{
cout << endl ;
cout << "OPTIONS ERROR : Failed allocating extra memory " << endl ;
cout << "While adding the option : \""<< opt << "\"" << endl;
cout << "Exiting." << endl ;
cout << endl ;
exit(0);
}
void
AnyOption::addOptionError( char opt )
{
cout << endl ;
cout << "OPTIONS ERROR : Failed allocating extra memory " << endl ;
cout << "While adding the option: \""<< opt << "\"" << endl;
cout << "Exiting." << endl ;
cout << endl ;
exit(0);
}
void
AnyOption::processOptions()
{
if( ! valueStoreOK() )
return;
}
void
AnyOption::processCommandArgs(int max_args)
{
max_legal_args = max_args;
processCommandArgs();
}
void
AnyOption::processCommandArgs( int _argc, char **_argv, int max_args )
{
max_legal_args = max_args;
processCommandArgs( _argc, _argv );
}
void
AnyOption::processCommandArgs( int _argc, char **_argv )
{
useCommandArgs( _argc, _argv );
processCommandArgs();
}
void
AnyOption::processCommandArgs()
{
if( ! ( valueStoreOK() && CommandSet() ) )
return;
if( max_legal_args == 0 )
max_legal_args = argc;
new_argv = (int*) malloc( (max_legal_args+1) * sizeof(int) );
for( int i = 1 ; i < argc ; i++ ){/* ignore first argv */
if( argv[i][0] == long_opt_prefix[0] &&
argv[i][1] == long_opt_prefix[1] ) { /* long GNU option */
int match_at = parseGNU( argv[i]+2 ); /* skip -- */
if( match_at >= 0 && i < argc-1 ) /* found match */
setValue( options[match_at] , argv[++i] );
}else if( argv[i][0] == opt_prefix_char ) { /* POSIX char */
if( POSIX() ){
char ch = parsePOSIX( argv[i]+1 );/* skip - */
if( ch != '0' && i < argc-1 ) /* matching char */
setValue( ch , argv[++i] );
} else { /* treat it as GNU option with a - */
int match_at = parseGNU( argv[i]+1 ); /* skip - */
if( match_at >= 0 && i < argc-1 ) /* found match */
setValue( options[match_at] , argv[++i] );
}
}else { /* not option but an argument keep index */
if( new_argc < max_legal_args ){
new_argv[ new_argc ] = i ;
new_argc++;
}else{ /* ignore extra arguments */
printVerbose( "Ignoring extra argument: " );
printVerbose( argv[i] );
printVerbose( );
printAutoUsage();
}
printVerbose( "Unknown command argument option : " );
printVerbose( argv[i] );
printVerbose( );
printAutoUsage();
}
}
}
char
AnyOption::parsePOSIX( char* arg )
{
for( unsigned int i = 0 ; i < strlen(arg) ; i++ ){
char ch = arg[i] ;
if( matchChar(ch) ) { /* keep matching flags till an option */
/*if last char argv[++i] is the value */
if( i == strlen(arg)-1 ){
return ch;
}else{/* else the rest of arg is the value */
i++; /* skip any '=' and ' ' */
while( arg[i] == whitespace
|| arg[i] == equalsign )
i++;
setValue( ch , arg+i );
return '0';
}
}
}
printVerbose( "Unknown command argument option : " );
printVerbose( arg );
printVerbose( );
printAutoUsage();
return '0';
}
int
AnyOption::parseGNU( char *arg )
{
size_t split_at = 0;
/* if has a '=' sign get value */
for( size_t i = 0 ; i < strlen(arg) ; i++ ){
if(arg[i] == equalsign ){
split_at = i ; /* store index */
i = strlen(arg); /* get out of loop */
}
}
if( split_at > 0 ){ /* it is an option value pair */
char* tmp = (char*) malloc( (split_at+1)*sizeof(char) );
for( size_t i = 0 ; i < split_at ; i++ )
tmp[i] = arg[i];
tmp[split_at] = '\0';
if ( matchOpt( tmp ) >= 0 ){
setValue( options[matchOpt(tmp)] , arg+split_at+1 );
free (tmp);
}else{
printVerbose( "Unknown command argument option : " );
printVerbose( arg );
printVerbose( );
printAutoUsage();
free (tmp);
return -1;
}
}else{ /* regular options with no '=' sign */
return matchOpt(arg);
}
return -1;
}
int
AnyOption::matchOpt( char *opt )
{
for( int i = 0 ; i < option_counter ; i++ ){
if( strcmp( options[i], opt ) == 0 ){
if( optiontype[i] == COMMON_OPT ||
optiontype[i] == COMMAND_OPT )
{ /* found option return index */
return i;
}else if( optiontype[i] == COMMON_FLAG ||
optiontype[i] == COMMAND_FLAG )
{ /* found flag, set it */
setFlagOn( opt );
return -1;
}
}
}
printVerbose( "Unknown command argument option : " );
printVerbose( opt ) ;
printVerbose( );
printAutoUsage();
return -1;
}
bool
AnyOption::matchChar( char c )
{
for( int i = 0 ; i < optchar_counter ; i++ ){
if( optionchars[i] == c ) { /* found match */
if(optchartype[i] == COMMON_OPT ||
optchartype[i] == COMMAND_OPT )
{ /* an option store and stop scanning */
return true;
}else if( optchartype[i] == COMMON_FLAG ||
optchartype[i] == COMMAND_FLAG ) { /* a flag store and keep scanning */
setFlagOn( c );
return false;
}
}
}
printVerbose( "Unknown command argument option : " );
printVerbose( c ) ;
printVerbose( );
printAutoUsage();
return false;
}
bool
AnyOption::valueStoreOK( )
{
int size= 0;
if( !set ){
if( g_value_counter > 0 ){
size = g_value_counter * sizeof(char*);
values = (char**)malloc( size );
for( int i = 0 ; i < g_value_counter ; i++)
values[i] = NULL;
set = true;
}
}
return set;
}
/*
* public get methods
*/
char*
AnyOption::getValue( const char *option )
{
if( !valueStoreOK() )
return NULL;
for( int i = 0 ; i < option_counter ; i++ ){
if( strcmp( options[i], option ) == 0 )
return values[ optionindex[i] ];
}
return NULL;
}
bool
AnyOption::getFlag( const char *option )
{
if( !valueStoreOK() )
return false;
for( int i = 0 ; i < option_counter ; i++ ){
if( strcmp( options[i], option ) == 0 )
return findFlag( values[ optionindex[i] ] );
}
return false;
}
char*
AnyOption::getValue( char option )
{
if( !valueStoreOK() )
return NULL;
for( int i = 0 ; i < optchar_counter ; i++ ){
if( optionchars[i] == option )
return values[ optcharindex[i] ];
}
return NULL;
}
bool
AnyOption::getFlag( char option )
{
if( !valueStoreOK() )
return false;
for( int i = 0 ; i < optchar_counter ; i++ ){
if( optionchars[i] == option )
return findFlag( values[ optcharindex[i] ] ) ;
}
return false;
}
bool
AnyOption::findFlag( char* val )
{
if( val == NULL )
return false;
if( strcmp( TRUE_FLAG , val ) == 0 )
return true;
return false;
}
/*
* private set methods
*/
bool
AnyOption::setValue( const char *option , char *value )
{
if( !valueStoreOK() )
return false;
for( int i = 0 ; i < option_counter ; i++ ){
if( strcmp( options[i], option ) == 0 ){
size_t length = (strlen(value)+1)*sizeof(char);
values[ optionindex[i] ] = (char*) malloc(length);
strcpy_s( values[ optionindex[i] ], length, value );
return true;
}
}
return false;
}
bool
AnyOption::setFlagOn( const char *option )
{
if( !valueStoreOK() )
return false;
for( int i = 0 ; i < option_counter ; i++ ){
if( strcmp( options[i], option ) == 0 ){
size_t length = (strlen(TRUE_FLAG)+1)*sizeof(char);
values[ optionindex[i] ] = (char*) malloc(length);
strcpy_s( values[ optionindex[i] ], length, TRUE_FLAG );
return true;
}
}
return false;
}
bool
AnyOption::setValue( char option , char *value )
{
if( !valueStoreOK() )
return false;
for( int i = 0 ; i < optchar_counter ; i++ ){
if( optionchars[i] == option ){
size_t length = (strlen(value)+1)*sizeof(char);
values[ optcharindex[i] ] = (char*) malloc(length);
strcpy_s( values[ optcharindex[i] ], length, value );
return true;
}
}
return false;
}
bool
AnyOption::setFlagOn( char option )
{
if( !valueStoreOK() )
return false;
for( int i = 0 ; i < optchar_counter ; i++ ){
if( optionchars[i] == option ){
size_t length = (strlen(TRUE_FLAG)+1)*sizeof(char);
values[ optcharindex[i] ] = (char*) malloc(length);
strcpy_s( values[ optcharindex[i] ] , length, TRUE_FLAG );
return true;
}
}
return false;
}
int
AnyOption::getArgc( )
{
return new_argc;
}
char*
AnyOption::getArgv( int index )
{
if( index < new_argc ){
return ( argv[ new_argv[ index ] ] );
}
return NULL;
}
/* dotfile sub routines */
bool
AnyOption::processFile()
{
if( ! (valueStoreOK() && FileSet()) )
return false;
return ( consumeFile(readFile()) );
}
bool
AnyOption::processFile( const char *filename )
{
useFiileName(filename );
return ( processFile() );
}
char*
AnyOption::readFile()
{
return ( readFile(filename) );
}
/*
* read the file contents to a character buffer
*/
char*
AnyOption::readFile( const char* fname )
{
char *buffer;
ifstream is;
is.open ( fname , ifstream::in );
if( ! is.good() ){
is.close();
return NULL;
}
is.seekg (0, ios::end);
size_t length = (size_t)is.tellg();
is.seekg (0, ios::beg);
buffer = (char*) malloc(length*sizeof(char));
is.read (buffer,length);
is.close();
return buffer;
}
/*
* scans a char* buffer for lines that does not
* start with the specified comment character.
*/
bool
AnyOption::consumeFile( char *buffer )
{
if( buffer == NULL )
return false;
char *cursor = buffer;/* preserve the ptr */
char *pline = NULL ;
int linelength = 0;
bool newline = true;
for( unsigned int i = 0 ; i < strlen( buffer ) ; i++ ){
if( *cursor == endofline ) { /* end of line */
if( pline != NULL ) /* valid line */
processLine( pline, linelength );
pline = NULL;
newline = true;
}else if( newline ){ /* start of line */
newline = false;
if( (*cursor != comment ) ){ /* not a comment */
pline = cursor ;
linelength = 0 ;
}
}
cursor++; /* keep moving */
linelength++;
}
free (buffer);
return true;