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GetPot.h
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// -*- c++ -*-
// GetPot Version $$Version$$ $$Date$$
//
// WEBSITE: http://getpot.sourceforge.net
//
// NOTE: The LPGL License for this library is only valid in case that
// it is not used for the production or development of applications
// dedicated to military industry. This is what the author calls
// the 'unofficial peace version of the LPGL'.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 of the
// License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
//
// (C) 2001-2005 Frank R. Schaefer <fschaef@users.sf.net>
//==========================================================================
#ifndef __include_guard_GETPOT_H__
#define __include_guard_GETPOT_H__
#if defined(WIN32) || defined(SOLARIS_RAW) || (__GNUC__ == 2) || defined(__HP_aCC)
#define strtok_r(a, b, c) strtok(a, b)
#endif // WINDOWS or SOLARIS or gcc 2.* or HP aCC
extern "C" {
// leave the 'extern C' to make it 100% sure to work -
// expecially with older distributions of header files.
#ifndef WIN32
// this is necessary (depending on OS)
#include <ctype.h>
#endif
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
}
#include <cmath>
#include <string>
#include <vector>
#include <algorithm>
// This is from Mushthofa
#include <cstring>
#include <fstream>
#include <iostream> // not every compiler distribution includes <iostream>
// // with <fstream>
typedef std::vector<std::string> STRING_VECTOR;
#define victorate(TYPE, VARIABLE, ITERATOR) \
std::vector<TYPE>::const_iterator ITERATOR = (VARIABLE).begin(); \
for(; (ITERATOR) != (VARIABLE).end(); (ITERATOR)++)
class GetPot {
//--------
inline void __basic_initialization();
public:
// (*) constructors, destructor, assignment operator -----------------------
inline GetPot();
inline GetPot(const GetPot&);
inline GetPot(const int argc_, char** argv_,
const char* FieldSeparator=0x0);
inline GetPot(const char* FileName,
const char* CommentStart=0x0, const char* CommentEnd=0x0,
const char* FieldSeparator=0x0);
inline ~GetPot();
inline GetPot& operator=(const GetPot&);
// (*) absorbing contents of another GetPot object
inline void absorb(const GetPot& That);
// -- for ufo detection: recording requested arguments, options etc.
inline void clear_requests();
inline void disable_request_recording() { __request_recording_f = false; }
inline void enable_request_recording() { __request_recording_f = true; }
// (*) direct access to command line arguments -----------------------------
inline const std::string operator[](unsigned Idx) const;
inline int get(unsigned Idx, int Default) const;
inline double get(unsigned Idx, const double& Default) const;
inline const std::string get(unsigned Idx, const char* Default) const;
inline unsigned size() const;
// (*) flags ---------------------------------------------------------------
inline bool options_contain(const char* FlagList) const;
inline bool argument_contains(unsigned Idx, const char* FlagList) const;
// (*) variables -----------------------------------------------------------
// -- scalar values
inline int operator()(const char* VarName, int Default) const;
inline double operator()(const char* VarName, const double& Default) const;
inline const std::string operator()(const char* VarName, const char* Default) const;
// -- vectors
inline int operator()(const char* VarName, int Default, unsigned Idx) const;
inline double operator()(const char* VarName, const double& Default, unsigned Idx) const;
inline const std::string operator()(const char* VarName, const char* Default, unsigned Idx) const;
// -- setting variables
// i) from outside of GetPot (considering prefix etc.)
// ii) from inside, use '__set_variable()' below
inline void set(const char* VarName, const char* Value, const bool Requested = true);
inline void set(const char* VarName, const double& Value, const bool Requested = true);
inline void set(const char* VarName, const int Value, const bool Requested = true);
inline unsigned vector_variable_size(const char* VarName) const;
inline STRING_VECTOR get_variable_names() const;
inline STRING_VECTOR get_section_names() const;
// (*) cursor oriented functions -------------------------------------------
inline void set_prefix(const char* Prefix) { prefix = std::string(Prefix); }
inline bool search_failed() const { return search_failed_f; }
// -- enable/disable search for an option in loop
inline void disable_loop() { search_loop_f = false; }
inline void enable_loop() { search_loop_f = true; }
// -- reset cursor to position '1'
inline void reset_cursor();
inline void init_multiple_occurrence();
// -- search for a certain option and set cursor to position
inline bool search(const char* option);
inline bool search(unsigned No, const char* P, ...);
// -- get argument at cursor++
inline int next(int Default);
inline double next(const double& Default);
inline const std::string next(const char* Default);
// -- search for option and get argument at cursor++
inline int follow(int Default, const char* Option);
inline double follow(const double& Default, const char* Option);
inline const std::string follow(const char* Default, const char* Option);
// -- search for one of the given options and get argument that follows it
inline int follow(int Default, unsigned No, const char* Option, ...);
inline double follow(const double& Default, unsigned No, const char* Option, ...);
inline const std::string follow(const char* Default, unsigned No, const char* Option, ...);
// -- lists of nominuses following an option
inline std::vector<std::string> nominus_followers(const char* Option);
inline std::vector<std::string> nominus_followers(unsigned No, ...);
// -- directly followed arguments
inline int direct_follow(int Default, const char* Option);
inline double direct_follow(const double& Default, const char* Option);
inline const std::string direct_follow(const char* Default, const char* Option);
inline std::vector<std::string> string_tails(const char* StartString);
inline std::vector<int> int_tails(const char* StartString, const int Default = 1);
inline std::vector<double> double_tails(const char* StartString, const double Default = 1.0);
// (*) nominus arguments ---------------------------------------------------
inline STRING_VECTOR nominus_vector() const;
inline unsigned nominus_size() const { return static_cast<unsigned int>(idx_nominus.size()); }
inline std::string next_nominus();
// (*) unidentified flying objects -----------------------------------------
inline STRING_VECTOR unidentified_arguments(unsigned Number, const char* Known, ...) const;
inline STRING_VECTOR unidentified_arguments(const STRING_VECTOR& Knowns) const;
inline STRING_VECTOR unidentified_arguments() const;
inline STRING_VECTOR unidentified_options(unsigned Number, const char* Known, ...) const;
inline STRING_VECTOR unidentified_options(const STRING_VECTOR& Knowns) const;
inline STRING_VECTOR unidentified_options() const;
inline std::string unidentified_flags(const char* Known,
int ArgumentNumber /* =-1 */) const;
inline STRING_VECTOR unidentified_variables(unsigned Number, const char* Known, ...) const;
inline STRING_VECTOR unidentified_variables(const STRING_VECTOR& Knowns) const;
inline STRING_VECTOR unidentified_variables() const;
inline STRING_VECTOR unidentified_sections(unsigned Number, const char* Known, ...) const;
inline STRING_VECTOR unidentified_sections(const STRING_VECTOR& Knowns) const;
inline STRING_VECTOR unidentified_sections() const;
inline STRING_VECTOR unidentified_nominuses(unsigned Number, const char* Known, ...) const;
inline STRING_VECTOR unidentified_nominuses(const STRING_VECTOR& Knowns) const;
inline STRING_VECTOR unidentified_nominuses() const;
// (*) output --------------------------------------------------------------
inline int print() const;
private:
// (*) Type Declaration ----------------------------------------------------
struct variable {
//-----------
// Variable to be specified on the command line or in input files.
// (i.e. of the form var='12 312 341')
// -- constructors, destructors, assignment operator
variable();
variable(const variable&);
variable(const char* Name, const char* Value, const char* FieldSeparator);
~variable();
variable& operator=(const variable& That);
void take(const char* Value, const char* FieldSeparator);
// -- get a specific element in the string vector
// (return 0 if not present)
const std::string* get_element(unsigned Idx) const;
// -- data memebers
std::string name; // identifier of variable
STRING_VECTOR value; // value of variable stored in vector
std::string original; // value of variable as given on command line
};
// (*) member variables --------------------------------------------------------------
std::string prefix; // prefix automatically added in queries
std::string section; // (for dollar bracket parsing)
STRING_VECTOR section_list; // list of all parsed sections
// -- argument vector
STRING_VECTOR argv; // vector of command line arguments stored as strings
unsigned cursor; // cursor for argv
bool search_loop_f; // shall search start at beginning after
// // reaching end of arg array ?
bool search_failed_f; // flag indicating a failed search() operation
// // (e.g. next() functions react with 'missed')
// -- nominus vector
int nominus_cursor; // cursor for nominus_pointers
std::vector<unsigned> idx_nominus; // indecies of 'no minus' arguments
// -- variables
// (arguments of the form "variable=value")
std::vector<variable> variables;
// -- comment delimiters
std::string _comment_start;
std::string _comment_end;
// -- field separator (separating elements of a vector)
std::string _field_separator;
// -- some functions return a char pointer to a temporarily existing string
// this container makes them 'available' until the getpot object is destroyed.
std::vector<char*> __internal_string_container;
// -- keeping track about arguments that are requested, so that the UFO detection
// can be simplified
STRING_VECTOR _requested_arguments;
STRING_VECTOR _requested_variables;
STRING_VECTOR _requested_sections;
bool __request_recording_f; // speed: request recording can be turned off
// -- if an argument is requested record it and the 'tag' the section branch to which
// it belongs. Caution: both functions mark the sections as 'tagged'.
void __record_argument_request(const std::string& Arg);
void __record_variable_request(const std::string& Arg);
// (*) helper functions ----------------------------------------------------
// set variable from inside GetPot (no prefix considered)
inline void __set_variable(const char* VarName, const char* Value);
// -- produce three basic data vectors:
// - argument vector
// - nominus vector
// - variable dictionary
inline void __parse_argument_vector(const STRING_VECTOR& ARGV);
// -- helpers for argument list processing
// * search for a variable in 'variables' array
inline const variable* __find_variable(const char*) const;
// * support finding directly followed arguments
inline const char* __match_starting_string(const char* StartString);
// * support search for flags in a specific argument
inline bool __check_flags(const std::string& Str, const char* FlagList) const;
// * type conversion if possible
inline int __convert_to_type(const std::string& String, int Default) const;
inline double __convert_to_type(const std::string& String, double Default) const;
// * prefix extraction
const std::string __get_remaining_string(const std::string& String,
const std::string& Start) const;
// * search for a specific string
inline bool __search_string_vector(const STRING_VECTOR& Vec,
const std::string& Str) const;
// -- helpers to parse input file
// create an argument vector based on data found in an input file, i.e.:
// 1) delete comments (in between '_comment_start' '_comment_end')
// 2) contract assignment expressions, such as
// my-variable = '007 J. B.'
// into
// my-variable='007 J. B.'
// 3) interprete sections like '[../my-section]' etc.
inline void __skip_whitespace(std::istream& istr);
inline const std::string __get_next_token(std::istream& istr);
inline const std::string __get_string(std::istream& istr);
inline const std::string __get_until_closing_bracket(std::istream& istr);
inline STRING_VECTOR __read_in_stream(std::istream& istr);
inline STRING_VECTOR __read_in_file(const char* FileName);
inline std::string __process_section_label(const std::string& Section,
STRING_VECTOR& section_stack);
// -- dollar bracket expressions
std::string __DBE_expand_string(const std::string str);
std::string __DBE_expand(const std::string str);
const GetPot::variable* __DBE_get_variable(const std::string str);
STRING_VECTOR __DBE_get_expr_list(const std::string str, const unsigned ExpectedNumber);
std::string __double2string(const double& Value) const {
// -- converts a double integer into a string
char* tmp = new char[128];
#ifndef WIN32
snprintf(tmp, (int)sizeof(char)*128, "%e", Value);
#else
_snprintf(tmp, sizeof(char)*128, "%e", Value);
#endif
std::string result(tmp);
delete [] tmp;
return result;
}
std::string __int2string(const int& Value) const {
// -- converts an integer into a string
char* tmp = new char[128];
#ifndef WIN32
snprintf(tmp, (int)sizeof(char)*128, "%i", Value);
#else
_snprintf(tmp, sizeof(char)*128, "%i", Value);
#endif
std::string result(tmp);
delete [] tmp;
return result;
}
STRING_VECTOR __get_section_tree(const std::string& FullPath) {
// -- cuts a variable name into a tree of sub-sections. this is requested for recording
// requested sections when dealing with 'ufo' detection.
STRING_VECTOR result;
const char* Start = FullPath.c_str();
for(char *p = (char*)Start; *p ; p++) {
if( *p == '/' ) {
*p = '\0'; // set terminating zero for convinience
const std::string Section = Start;
*p = '/'; // reset slash at place
result.push_back(Section);
}
}
return result;
}
};
///////////////////////////////////////////////////////////////////////////////
// (*) constructors, destructor, assignment operator
//.............................................................................
//
inline void
GetPot::__basic_initialization()
{
cursor = 0; nominus_cursor = -1;
search_failed_f = true; search_loop_f = true;
prefix = ""; section = "";
// automatic request recording for later ufo detection
__request_recording_f = true;
// comment start and end strings
_comment_start = std::string("#");
_comment_end = std::string("\n");
// default: separate vector elements by whitespaces
_field_separator = " \t\n";
}
inline
GetPot::GetPot()
{
__basic_initialization();
STRING_VECTOR _apriori_argv;
_apriori_argv.push_back(std::string("Empty"));
__parse_argument_vector(_apriori_argv);
}
inline
GetPot::GetPot(const int argc_, char ** argv_,
const char* FieldSeparator /* =0x0 */)
// leave 'char**' non-const to honor less capable compilers ...
{
// TODO: Ponder over the problem when the argument list is of size = 0.
// This is 'sabotage', but it can still occur if the user specifies
// it himself.
assert(argc_ >= 1);
__basic_initialization();
// if specified -> overwrite default string
if( FieldSeparator ) _field_separator = std::string(FieldSeparator);
// -- make an internal copy of the argument list:
STRING_VECTOR _apriori_argv;
// -- for the sake of clarity: we do want to include the first argument in the argument vector !
// it will not be a nominus argument, though. This gives us a minimun vector size of one
// which facilitates error checking in many functions. Also the user will be able to
// retrieve the name of his application by "get[0]"
_apriori_argv.push_back(std::string(argv_[0]));
int i=1;
for(; i<argc_; ++i) {
std::string tmp(argv_[i]); // recall the problem with temporaries,
_apriori_argv.push_back(tmp); // reference counting in arguement lists ...
}
__parse_argument_vector(_apriori_argv);
}
inline
GetPot::GetPot(const char* FileName,
const char* CommentStart /* = 0x0 */, const char* CommentEnd /* = 0x0 */,
const char* FieldSeparator/* = 0x0 */)
{
__basic_initialization();
// if specified -> overwrite default strings
if( CommentStart ) _comment_start = std::string(CommentStart);
if( CommentEnd ) _comment_end = std::string(CommentEnd);
if( FieldSeparator ) _field_separator = FieldSeparator;
STRING_VECTOR _apriori_argv;
// -- file name is element of argument vector, however, it is not parsed for
// variable assignments or nominuses.
_apriori_argv.push_back(std::string(FileName));
STRING_VECTOR args = __read_in_file(FileName);
_apriori_argv.insert(_apriori_argv.begin()+1, args.begin(), args.end());
__parse_argument_vector(_apriori_argv);
}
inline
GetPot::GetPot(const GetPot& That)
{ GetPot::operator=(That); }
inline
GetPot::~GetPot()
{
// may be some return strings had to be created, delete now !
victorate(char*, __internal_string_container, it)
delete [] *it;
}
inline GetPot&
GetPot::operator=(const GetPot& That)
{
if (&That == this) return *this;
_comment_start = That._comment_start;
_comment_end = That._comment_end;
argv = That.argv;
variables = That.variables;
prefix = That.prefix;
cursor = That.cursor;
nominus_cursor = That.nominus_cursor;
search_failed_f = That.search_failed_f;
idx_nominus = That.idx_nominus;
search_loop_f = That.search_loop_f;
return *this;
}
inline void
GetPot::absorb(const GetPot& That)
{
if (&That == this) return;
STRING_VECTOR __tmp(That.argv);
__tmp.erase(__tmp.begin());
__parse_argument_vector(__tmp);
}
inline void
GetPot::clear_requests()
{
_requested_arguments.erase(_requested_arguments.begin(), _requested_arguments.end());
_requested_variables.erase(_requested_variables.begin(), _requested_variables.end());
_requested_sections.erase(_requested_sections.begin(), _requested_sections.end());
}
inline void
GetPot::__parse_argument_vector(const STRING_VECTOR& ARGV)
{
if( ARGV.size() == 0 ) return;
// build internal databases:
// 1) array with no-minus arguments (usually used as filenames)
// 2) variable assignments:
// 'variable name' '=' number | string
STRING_VECTOR section_stack;
STRING_VECTOR::const_iterator it = ARGV.begin();
section = "";
// -- do not parse the first argument, so that it is not interpreted a s a nominus or so.
argv.push_back(*it);
++it;
// -- loop over remaining arguments
unsigned i=1;
for(; it != ARGV.end(); ++it, ++i) {
std::string arg = *it;
if( arg.length() == 0 ) continue;
// -- [section] labels
if( arg.length() > 1 && arg[0] == '[' && arg[arg.length()-1] == ']' ) {
// (*) sections are considered 'requested arguments'
if( __request_recording_f ) _requested_arguments.push_back(arg);
const std::string Name = __DBE_expand_string(arg.substr(1, arg.length()-2));
section = __process_section_label(Name, section_stack);
// new section --> append to list of sections
if( find(section_list.begin(), section_list.end(), section) == section_list.end() )
if( section.length() != 0 ) section_list.push_back(section);
argv.push_back(arg);
}
else {
arg = section + __DBE_expand_string(arg);
argv.push_back(arg);
}
// -- separate array for nominus arguments
if( arg[0] != '-' ) idx_nominus.push_back(unsigned(i));
// -- variables: does arg contain a '=' operator ?
const char* p = arg.c_str();
for(; *p ; p++) {
if( *p == '=' ) {
// (*) record for later ufo detection
// arguments carriying variables are always treated as 'requested' arguments.
// as a whole! That is 'x=4712' is considered a requested argument.
//
// unrequested variables have to be detected with the ufo-variable
// detection routine.
if( __request_recording_f ) _requested_arguments.push_back(arg);
// set terminating 'zero' to treat first part as single string
// => arg (from start to 'p') = Name of variable
// p+1 (until terminating zero) = value of variable
char* o = (char*)p++;
*o = '\0'; // set temporary terminating zero
// __set_variable(...)
// calls __find_variable(...) which registers the search
// temporarily disable this
const bool tmp = __request_recording_f;
__request_recording_f = false;
__set_variable(arg.c_str(), p); // v-name = c_str() bis 'p', value = rest
__request_recording_f = tmp;
*o = '='; // reset the original '='
break;
}
}
}
}
inline STRING_VECTOR
GetPot::__read_in_file(const char* FileName)
{
std::ifstream i(FileName);
if( ! i ) return STRING_VECTOR();
// argv[0] == the filename of the file that was read in
return __read_in_stream(i);
}
inline STRING_VECTOR
GetPot::__read_in_stream(std::istream& istr)
{
STRING_VECTOR brute_tokens;
while(istr) {
__skip_whitespace(istr);
const std::string Token = __get_next_token(istr);
if( Token.length() == 0 || Token[0] == EOF) break;
brute_tokens.push_back(Token);
}
// -- reduce expressions of token1'='token2 to a single
// string 'token1=token2'
// -- copy everything into 'argv'
// -- arguments preceded by something like '[' name ']' (section)
// produce a second copy of each argument with a prefix '[name]argument'
unsigned i1 = 0;
unsigned i2 = 1;
unsigned i3 = 2;
STRING_VECTOR arglist;
while( i1 < brute_tokens.size() ) {
const std::string& SRef = brute_tokens[i1];
// 1) concatinate 'abcdef' '=' 'efgasdef' to 'abcdef=efgasdef'
// note: java.lang.String: substring(a,b) = from a to b-1
// C++ string: substr(a,b) = from a to a + b
if( i2 < brute_tokens.size() && brute_tokens[i2] == "=" ) {
if( i3 >= brute_tokens.size() )
arglist.push_back(brute_tokens[i1] + brute_tokens[i2]);
else
arglist.push_back(brute_tokens[i1] + brute_tokens[i2] + brute_tokens[i3]);
i1 = i3+1; i2 = i3+2; i3 = i3+3;
continue;
}
else {
arglist.push_back(SRef);
i1=i2; i2=i3; i3++;
}
}
return arglist;
}
inline void
GetPot::__skip_whitespace(std::istream& istr)
// find next non-whitespace while deleting comments
{
int tmp = istr.get();
do {
// -- search a non whitespace
while( isspace(tmp) ) {
tmp = istr.get();
if( ! istr ) return;
}
// -- look if characters match the comment starter string
const std::istream::pos_type Pos = istr.tellg();
unsigned i=0;
for(; i<_comment_start.length() ; ++i) {
if( tmp != _comment_start[i] ) {
istr.seekg(Pos);
// -- one step more backwards, since 'tmp' already at non-whitespace
istr.unget();
return;
}
tmp = istr.get();
if( ! istr ) { istr.unget(); return; }
}
// 'tmp' contains last character of _comment_starter
// -- comment starter found -> search for comment ender
unsigned match_no=0;
while(1+1 == 2) {
tmp = istr.get();
if( ! istr ) { istr.unget(); return; }
if( tmp == _comment_end[match_no] ) {
match_no++;
if( match_no == _comment_end.length() ) {
istr.unget();
break; // shuffle more whitespace, end of comment found
}
}
else
match_no = 0;
}
tmp = istr.get();
} while( istr );
istr.unget();
}
inline const std::string
GetPot::__get_next_token(std::istream& istr)
// get next concatinates string token. consider quotes that embrace
// whitespaces
{
std::string token;
int tmp = 0;
int last_letter = 0;
while(1+1 == 2) {
last_letter = tmp; tmp = istr.get();
if( tmp == EOF
|| ((tmp == ' ' || tmp == '\t' || tmp == '\n') && last_letter != '\\') ) {
return token;
}
else if( tmp == '\'' && last_letter != '\\' ) {
// QUOTES: un-backslashed quotes => it's a string
token += __get_string(istr);
continue;
}
else if( tmp == '{' && last_letter == '$') {
token += '{' + __get_until_closing_bracket(istr);
continue;
}
else if( tmp == '$' && last_letter == '\\') {
token += tmp; tmp = 0; // so that last_letter will become = 0, not '$';
continue;
}
else if( tmp == '\\' && last_letter != '\\')
continue; // don't append un-backslashed backslashes
token += tmp;
}
}
inline const std::string
GetPot::__get_string(std::istream& istr)
// parse input until next matching '
{
std::string str;
int tmp = 0;
int last_letter = 0;
while(1 + 1 == 2) {
last_letter = tmp; tmp = istr.get();
if( tmp == EOF) return str;
// un-backslashed quotes => it's the end of the string
else if( tmp == '\'' && last_letter != '\\') return str;
else if( tmp == '\\' && last_letter != '\\') continue; // don't append
str += tmp;
}
}
inline const std::string
GetPot::__get_until_closing_bracket(std::istream& istr)
// parse input until next matching }
{
std::string str = "";
int tmp = 0;
int last_letter = 0;
int brackets = 1;
while(1 + 1 == 2) {
last_letter = tmp; tmp = istr.get();
if( tmp == EOF) return str;
else if( tmp == '{' && last_letter == '$') brackets += 1;
else if( tmp == '}') {
brackets -= 1;
// un-backslashed brackets => it's the end of the string
if( brackets == 0) return str + '}';
else if( tmp == '\\' && last_letter != '\\')
continue; // do not append an unbackslashed backslash
}
str += tmp;
}
}
inline std::string
GetPot::__process_section_label(const std::string& Section,
STRING_VECTOR& section_stack)
{
std::string sname = Section;
// 1) subsection of actual section ('./' prefix)
if( sname.length() >= 2 && sname.substr(0, 2) == "./" ) {
sname = sname.substr(2);
}
// 2) subsection of parent section ('../' prefix)
else if( sname.length() >= 3 && sname.substr(0, 3) == "../" ) {
do {
if( section_stack.end() != section_stack.begin() )
section_stack.pop_back();
sname = sname.substr(3);
} while( sname.substr(0, 3) == "../" );
}
// 3) subsection of the root-section
else {
section_stack.erase(section_stack.begin(), section_stack.end());
// [] => back to root section
}
if( sname != "" ) {
// parse section name for 'slashes'
unsigned i=0;
while( i < sname.length() ) {
if( sname[i] == '/' ) {
section_stack.push_back(sname.substr(0,i));
if( i+1 < sname.length()-1 )
sname = sname.substr(i+1);
i = 0;
}
else
++i;
}
section_stack.push_back(sname);
}
std::string section = "";
if( section_stack.size() != 0 ) {
victorate(std::string, section_stack, it)
section += *it + "/";
}
return section;
}
// convert string to DOUBLE, if not possible return Default
inline double
GetPot::__convert_to_type(const std::string& String, double Default) const
{
double tmp;
if( sscanf(String.c_str(),"%lf", &tmp) != 1 ) return Default;
return tmp;
}
// convert string to INT, if not possible return Default
inline int
GetPot::__convert_to_type(const std::string& String, int Default) const
{
// NOTE: intermediate results may be floating points, so that the string
// may look like 2.0e1 (i.e. float format) => use float conversion
// in any case.
return (int)__convert_to_type(String, (double)Default);
}
//////////////////////////////////////////////////////////////////////////////
// (*) cursor oriented functions
//.............................................................................
inline const std::string
GetPot::__get_remaining_string(const std::string& String, const std::string& Start) const
// Checks if 'String' begins with 'Start' and returns the remaining String.
// Returns None if String does not begin with Start.
{
if( Start == "" ) return String;
// note: java.lang.String: substring(a,b) = from a to b-1
// C++ string: substr(a,b) = from a to a + b
if( String.find(Start) == 0 ) return String.substr(Start.length());
else return "";
}
// -- search for a certain argument and set cursor to position
inline bool
GetPot::search(const char* Option)
{
unsigned OldCursor = cursor;
const std::string SearchTerm = prefix + Option;
// (*) record requested arguments for later ufo detection
__record_argument_request(SearchTerm);
if( OldCursor >= argv.size() ) OldCursor = static_cast<unsigned int>(argv.size()) - 1;
search_failed_f = true;
// (*) first loop from cursor position until end
unsigned c = cursor;
for(; c < argv.size(); c++) {
if( argv[c] == SearchTerm )
{ cursor = c; search_failed_f = false; return true; }
}
if( ! search_loop_f ) return false;
// (*) second loop from 0 to old cursor position
for(c = 1; c < OldCursor; c++) {
if( argv[c] == SearchTerm )
{ cursor = c; search_failed_f = false; return true; }
}
// in case nothing is found the cursor stays where it was
return false;
}
inline bool
GetPot::search(unsigned No, const char* P, ...)
{
// (*) recording the requested arguments happens in subroutine 'search'
if( No == 0 ) return false;
// search for the first argument
if( search(P) == true ) return true;
// start interpreting variable argument list
va_list ap;
va_start(ap, P);
unsigned i = 1;
for(; i < No; ++i) {
char* Opt = va_arg(ap, char *);
if( search(Opt) == true ) break;
}
if( i < No ) {
++i;
// loop was left before end of array --> hit but
// make sure that the rest of the search terms is marked
// as requested.
for(; i < No; ++i) {
char* Opt = va_arg(ap, char *);
// (*) record requested arguments for later ufo detection
__record_argument_request(Opt);
}
va_end(ap);
return true;
}
va_end(ap);
// loop was left normally --> no hit
return false;
}
inline void
GetPot::reset_cursor()
{ search_failed_f = false; cursor = 0; }
inline void
GetPot::init_multiple_occurrence()
{ disable_loop(); reset_cursor(); }
///////////////////////////////////////////////////////////////////////////////
// (*) direct access to command line arguments
//.............................................................................
//
inline const std::string
GetPot::operator[](unsigned idx) const
{ return idx < argv.size() ? argv[idx] : ""; }
inline int
GetPot::get(unsigned Idx, int Default) const
{
if( Idx >= argv.size() ) return Default;
return __convert_to_type(argv[Idx], Default);
}
inline double
GetPot::get(unsigned Idx, const double& Default) const
{
if( Idx >= argv.size() ) return Default;
return __convert_to_type(argv[Idx], Default);
}
inline const std::string
GetPot::get(unsigned Idx, const char* Default) const
{
if( Idx >= argv.size() ) return Default;
else return argv[Idx];
}
inline unsigned
GetPot::size() const
{ return static_cast<unsigned int>(argv.size()); }
// -- next() function group
inline int
GetPot::next(int Default)
{
if( search_failed_f ) return Default;
cursor++;
if( cursor >= argv.size() )
{ cursor = static_cast<unsigned int>(argv.size()); return Default; }
// (*) record requested argument for later ufo detection
__record_argument_request(argv[cursor]);
const std::string Remain = __get_remaining_string(argv[cursor], prefix);
return Remain != "" ? __convert_to_type(Remain, Default) : Default;
}
inline double
GetPot::next(const double& Default)
{
if( search_failed_f ) return Default;
cursor++;
if( cursor >= argv.size() )
{ cursor = static_cast<unsigned int>(argv.size()); return Default; }
// (*) record requested argument for later ufo detection
__record_argument_request(argv[cursor]);
std::string Remain = __get_remaining_string(argv[cursor], prefix);
return Remain != "" ? __convert_to_type(Remain, Default) : Default;
}
inline const std::string
GetPot::next(const char* Default)
{
if( search_failed_f ) return Default;
cursor++;
if( cursor >= argv.size() )
{ cursor = static_cast<unsigned int>(argv.size()); return Default; }
// (*) record requested argument for later ufo detection
__record_argument_request(argv[cursor]);
const std::string Remain = __get_remaining_string(argv[cursor], prefix);
if( Remain == "" ) return Default;
// (*) function returns a pointer to a char array (inside Remain)
// this array will be deleted, though after this function call.
// To ensure propper functioning, create a copy inside *this
// object and only delete it, when *this is deleted.
char* result = new char[Remain.length()+1];
strncpy(result, Remain.c_str(), Remain.length()+1);