730 lines
20 KiB
C++
730 lines
20 KiB
C++
#ifndef APPLICATION_UTILITIES_ARGUMENTPARSER_H
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#define APPLICATION_UTILITIES_ARGUMENTPARSER_H
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#include "./global.h"
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#include <vector>
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#include <initializer_list>
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#include <functional>
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#ifdef DEBUG_BUILD
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# include <cassert>
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#endif
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class ArgumentParserTests;
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namespace ApplicationUtilities {
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LIB_EXPORT extern const char *applicationName;
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LIB_EXPORT extern const char *applicationAuthor;
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LIB_EXPORT extern const char *applicationVersion;
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LIB_EXPORT extern const char *applicationUrl;
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#define SET_APPLICATION_INFO \
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::ApplicationUtilities::applicationName = APP_NAME; \
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::ApplicationUtilities::applicationAuthor = APP_AUTHOR; \
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::ApplicationUtilities::applicationVersion = APP_VERSION; \
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::ApplicationUtilities::applicationUrl = APP_URL
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class Argument;
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class ArgumentParser;
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typedef std::initializer_list<Argument *> ArgumentInitializerList;
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typedef std::vector<Argument *> ArgumentVector;
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typedef std::function<bool (Argument *)> ArgumentPredicate;
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/*!
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* \brief The UnknownArgumentBehavior enum specifies the behavior of the argument parser when an unknown
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* argument is detected.
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*/
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enum class UnknownArgumentBehavior
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{
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Ignore, /**< Unknown arguments are ignored without warnings. */
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Warn, /**< A warning is printed to std::cerr if an unknown argument is detected. */
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Fail /**< Further parsing is aborted and an ApplicationUtilities::Failure instance with an error message is thrown. */
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};
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/*!
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* \brief The ValueCompletionBehavior enum specifies the items to be considered when generating completion for an argument value.
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*/
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enum class ValueCompletionBehavior : unsigned char
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{
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None = 0,
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PreDefinedValues = 2,
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Files = 4,
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Directories = 8,
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FileSystemIfNoPreDefinedValues = 16,
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AppendEquationSign = 32
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};
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constexpr ValueCompletionBehavior operator|(ValueCompletionBehavior lhs, ValueCompletionBehavior rhs)
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{
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return static_cast<ValueCompletionBehavior>(static_cast<unsigned char>(lhs) | static_cast<unsigned char>(rhs));
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}
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constexpr bool operator&(ValueCompletionBehavior lhs, ValueCompletionBehavior rhs)
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{
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return static_cast<bool>(static_cast<unsigned char>(lhs) & static_cast<unsigned char>(rhs));
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}
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Argument LIB_EXPORT *firstPresentUncombinableArg(const ArgumentVector &args, const Argument *except);
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struct LIB_EXPORT ArgumentOccurance
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{
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ArgumentOccurance(std::size_t index);
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ArgumentOccurance(std::size_t index, const std::vector<Argument *> parentPath, Argument *parent);
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std::size_t index;
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std::vector<const char *> values;
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std::vector<Argument *> path;
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};
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inline ArgumentOccurance::ArgumentOccurance(std::size_t index) :
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index(index)
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{}
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inline ArgumentOccurance::ArgumentOccurance(std::size_t index, const std::vector<Argument *> parentPath, Argument *parent) :
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index(index),
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path(parentPath)
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{
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if(parent) {
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path.push_back(parent);
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}
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}
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class LIB_EXPORT Argument
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{
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friend class ArgumentParser;
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public:
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typedef std::function <void (const std::vector<const char *> &)> CallbackFunction;
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Argument(const char *name, char abbreviation = '\0', const char *description = nullptr, const char *example = nullptr);
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~Argument();
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const char *name() const;
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void setName(const char *name);
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char abbreviation() const;
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void setAbbreviation(char abbreviation);
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const char *description() const;
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void setDescription(const char *description);
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const char *example() const;
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void setExample(const char *example);
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const std::vector<const char *> &values(std::size_t occurrance = 0) const;
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std::size_t requiredValueCount() const;
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void setRequiredValueCount(std::size_t requiredValueCount);
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const std::vector<const char *> &valueNames() const;
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void setValueNames(std::initializer_list<const char *> valueNames);
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void appendValueName(const char *valueName);
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bool allRequiredValuesPresent(std::size_t occurrance = 0) const;
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bool isPresent() const;
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std::size_t occurrences() const;
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std::size_t index(std::size_t occurrance) const;
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std::size_t minOccurrences() const;
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std::size_t maxOccurrences() const;
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void setConstraints(std::size_t minOccurrences, std::size_t maxOccurrences);
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const std::vector<Argument *> &path(std::size_t occurrance = 0) const;
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bool isRequired() const;
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void setRequired(bool required);
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bool isCombinable() const;
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void setCombinable(bool value);
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bool isImplicit() const;
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void setImplicit(bool value);
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bool denotesOperation() const;
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void setDenotesOperation(bool denotesOperation);
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void setCallback(CallbackFunction callback);
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void printInfo(std::ostream &os, unsigned char indentionLevel = 0) const;
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const ArgumentVector &subArguments() const;
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void setSubArguments(const ArgumentInitializerList &subArguments);
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void addSubArgument(Argument *arg);
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bool hasSubArguments() const;
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const ArgumentVector parents() const;
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bool isMainArgument() const;
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bool isParentPresent() const;
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ValueCompletionBehavior valueCompletionBehaviour() const;
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void setValueCompletionBehavior(ValueCompletionBehavior valueCompletionBehaviour);
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const char *preDefinedCompletionValues() const;
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void setPreDefinedCompletionValues(const char *preDefinedCompletionValues);
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Argument *conflictsWithArgument() const;
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void reset();
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private:
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const char *m_name;
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char m_abbreviation;
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const char *m_description;
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const char *m_example;
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std::size_t m_minOccurrences;
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std::size_t m_maxOccurrences;
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bool m_combinable;
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bool m_denotesOperation;
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std::size_t m_requiredValueCount;
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std::vector<const char *> m_valueNames;
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bool m_implicit;
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std::vector<ArgumentOccurance> m_occurances;
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ArgumentVector m_subArgs;
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CallbackFunction m_callbackFunction;
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ArgumentVector m_parents;
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bool m_isMainArg;
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ValueCompletionBehavior m_valueCompletionBehavior;
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const char *m_preDefinedCompletionValues;
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};
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class LIB_EXPORT ArgumentParser
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{
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friend ArgumentParserTests;
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public:
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ArgumentParser();
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const ArgumentVector &mainArguments() const;
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void setMainArguments(const ArgumentInitializerList &mainArguments);
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void addMainArgument(Argument *argument);
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void printHelp(std::ostream &os) const;
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Argument *findArg(const ArgumentPredicate &predicate) const;
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static Argument *findArg(const ArgumentVector &arguments, const ArgumentPredicate &predicate);
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void parseArgs(int argc, const char *const *argv);
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unsigned int actualArgumentCount() const;
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const char *executable() const;
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UnknownArgumentBehavior unknownArgumentBehavior() const;
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void setUnknownArgumentBehavior(UnknownArgumentBehavior behavior);
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Argument *defaultArgument() const;
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void setDefaultArgument(Argument *argument);
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private:
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IF_DEBUG_BUILD(void verifyArgs(const ArgumentVector &args);)
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void readSpecifiedArgs(ArgumentVector &args, std::size_t &index, const char *const *&argv, const char *const *end, Argument *&lastArg, bool completionMode = false);
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void printBashCompletion(int argc, const char * const *argv, unsigned int cursorPos, const Argument *lastDetectedArg);
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void checkConstraints(const ArgumentVector &args);
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void invokeCallbacks(const ArgumentVector &args);
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ArgumentVector m_mainArgs;
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unsigned int m_actualArgc;
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const char *m_executable;
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UnknownArgumentBehavior m_unknownArgBehavior;
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Argument *m_defaultArg;
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};
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/*!
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* \brief Returns the name of the argument.
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*
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* The parser compares the name with the characters following a "--" prefix to
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* identify arguments.
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*/
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inline const char *Argument::name() const
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{
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return m_name;
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}
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/*!
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* \brief Sets the name of the argument.
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*
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* The name mustn't be empty or contain white spaces or equation chars.
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*
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* The parser compares the name with the characters following a "--" prefix to
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* identify arguments.
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*/
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inline void Argument::setName(const char *name)
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{
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#ifdef DEBUG_BUILD
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if(name && *name) {
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for(const char *c = name; *c; ++c) {
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assert(*c != ' ' && *c != '=');
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}
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}
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#endif
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m_name = name;
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}
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/*!
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* \brief Returns the abbreviation of the argument.
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*
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* The parser compares the abbreviation with the characters following a "-" prefix to
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* identify arguments.
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*/
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inline char Argument::abbreviation() const
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{
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return m_abbreviation;
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}
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/*!
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* \brief Sets the abbreviation of the argument.
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*
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* The abbreviation might be empty but mustn't contain any white spaces or
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* equation chars when provided.
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*
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* The parser compares the abbreviation with the characters following a "-" prefix to
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* identify arguments.
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*/
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inline void Argument::setAbbreviation(char abbreviation)
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{
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IF_DEBUG_BUILD(assert(abbreviation != ' ' && abbreviation != '='));
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m_abbreviation = abbreviation;
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}
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/*!
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* \brief Returns the description of the argument.
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*
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* The parser uses the description when printing help information.
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*/
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inline const char *Argument::description() const
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{
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return m_description;
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}
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/*!
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* \brief Sets the description of the argument.
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*
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* The parser uses the description when printing help information.
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*/
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inline void Argument::setDescription(const char *description)
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{
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m_description = description;
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}
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/*!
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* \brief Returns the usage example of the argument.
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*
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* The parser uses the description when printing help information.
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*/
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inline const char *Argument::example() const
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{
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return m_example;
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}
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/*!
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* \brief Sets the a usage example for the argument.
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*
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* The parser uses the description when printing help information.
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*/
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inline void Argument::setExample(const char *example)
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{
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m_example = example;
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}
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/*!
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* \brief Returns the additional values for the argument.
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*
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* These values set by the parser when parsing the command line arguments.
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*/
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inline const std::vector<const char *> &Argument::values(std::size_t occurrance) const
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{
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return m_occurances[occurrance].values;
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}
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/*!
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* \brief Returns the number of values which are required to be given
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* for this argument.
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*
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* The parser will expect that many values when parsing command line arguments.
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* A negative value indicates a variable number of arguments to be expected.
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*
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* The default value is 0.
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*
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* \sa setRequiredValueCount()
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* \sa valueNames()
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* \sa setValueNames()
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*/
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inline std::size_t Argument::requiredValueCount() const
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{
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return m_requiredValueCount;
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}
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/*!
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* \brief Sets the number of values which are required to be given
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* for this argument.
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*
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* The parser will expect that many values when parsing command line arguments.
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* A negative value indicates a variable number of arguments to be expected.
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*
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* \sa requiredValueCount()
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* \sa valueNames()
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* \sa setValueNames()
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*/
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inline void Argument::setRequiredValueCount(std::size_t requiredValueCount)
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{
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m_requiredValueCount = requiredValueCount;
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}
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/*!
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* \brief Returns the names of the requried values.
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*
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* These names will be shown when printing information about the argument.
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*
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* \sa setValueNames()
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* \sa appendValueNames()
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*/
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inline const std::vector<const char *> &Argument::valueNames() const
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{
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return m_valueNames;
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}
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/*!
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* \brief Sets the names of the requried values. These names will be used
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* when printing information about the argument.
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*
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* If the number of value names is higher then the number of requried values
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* the additional value names will be ignored.
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* If the number of value names is lesser then the number of requried values
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* generic values will be used for the missing names.
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*
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* \sa appendValueName()
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* \sa valueNames()
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* \sa requiredValueCount()
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*/
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inline void Argument::setValueNames(std::initializer_list<const char *> valueNames)
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{
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m_valueNames.assign(valueNames);
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}
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/*!
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* \brief Appends a value name. The value names names will be shown
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* when printing information about the argument.
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* \sa setValueNames()
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* \sa valueNames()
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*/
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inline void Argument::appendValueName(const char *valueName)
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{
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m_valueNames.emplace_back(valueName);
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}
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/*!
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* \brief Returns an indication whether all required values are present.
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*/
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inline bool Argument::allRequiredValuesPresent(std::size_t occurrance) const
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{
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return m_requiredValueCount == static_cast<std::size_t>(-1)
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|| (m_occurances[occurrance].values.size() >= static_cast<std::size_t>(m_requiredValueCount));
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}
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/*!
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* \brief Returns an indication whether the argument is an implicit argument.
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* \sa setImplicit()
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*/
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inline bool Argument::isImplicit() const
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{
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return m_implicit;
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}
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/*!
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* \brief Sets whether the argument is an implicit argument.
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* \sa isImplicit()
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*/
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inline void Argument::setImplicit(bool implicit)
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{
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m_implicit = implicit;
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}
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/*!
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* \brief Returns an indication whether the argument could be detected when parsing.
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*/
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inline bool Argument::isPresent() const
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{
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return !m_occurances.empty();
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}
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/*!
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* \brief Returns how often the argument could be detected when parsing.
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*/
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inline std::size_t Argument::occurrences() const
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{
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return m_occurances.size();
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}
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/*!
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* \brief Returns the indices of the argument's occurences which could be detected when parsing.
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*/
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inline std::size_t Argument::index(std::size_t occurrance) const
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{
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return m_occurances[occurrance].index;
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}
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/*!
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* \brief Returns the minimum number of occurrences.
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*
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* If the argument occurs not that many times, the parser will complain.
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*/
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inline std::size_t Argument::minOccurrences() const
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{
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return m_minOccurrences;
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}
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/*!
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* \brief Returns the maximum number of occurrences.
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*
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* If the argument occurs more often, the parser will complain.
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*/
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inline std::size_t Argument::maxOccurrences() const
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{
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return m_maxOccurrences;
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}
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/*!
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* \brief Sets the allowed number of occurrences.
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* \sa minOccurrences()
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* \sa maxOccurrences()
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*/
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inline void Argument::setConstraints(std::size_t minOccurrences, std::size_t maxOccurrences)
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{
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m_minOccurrences = minOccurrences;
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m_maxOccurrences = maxOccurrences;
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}
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/*!
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* \brief Returns the path of the specified \a occurrance.
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*/
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inline const std::vector<Argument *> &Argument::path(std::size_t occurrance) const
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{
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return m_occurances[occurrance].path;
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}
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/*!
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* \brief Returns an indication whether the argument is mandatory.
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*
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* The parser will complain if a mandatory argument is not present.
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*
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* The default value is false.
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*
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* \sa setRequired()
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*/
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inline bool Argument::isRequired() const
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{
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return m_minOccurrences;
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}
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/*!
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* \brief Sets whether this argument is mandatory or not.
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*
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* The parser will complain if a mandatory argument is not present.
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*
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* * \sa isRequired()
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*/
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inline void Argument::setRequired(bool required)
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{
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if(required) {
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if(!m_minOccurrences) {
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m_minOccurrences = 1;
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}
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} else {
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m_minOccurrences = 0;
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}
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}
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/*!
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* \brief Returns an indication whether the argument is combinable.
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*
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* The parser will complain if two arguments labeled as uncombinable are
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* present at the same time.
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*
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* \sa setCombinable()
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*/
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inline bool Argument::isCombinable() const
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{
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return m_combinable;
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}
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/*!
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* \brief Sets if this argument can be combined.
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*
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* The parser will complain if two arguments labeled as uncombinable are
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* present at the same time.
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*
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* \sa isCombinable()
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*/
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inline void Argument::setCombinable(bool value)
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{
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m_combinable = value;
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}
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/*!
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* \brief Returns whether the argument denotes the operation.
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*
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* An argument which denotes the operation might be specified
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* withouth "--" or "-" prefix as first main argument.
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*
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* The default value is false.
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*
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* \sa setDenotesOperation()
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*/
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inline bool Argument::denotesOperation() const
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{
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return m_denotesOperation;
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}
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/*!
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* \brief Sets whether the argument denotes the operation.
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* \sa denotesOperation()
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*/
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inline void Argument::setDenotesOperation(bool denotesOperation)
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{
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m_denotesOperation = denotesOperation;
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}
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/*!
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* \brief Sets a \a callback function which will be called by the parser if
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* the argument could be found and no parsing errors occured.
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* \remarks The \a callback will be called for each occurrance of the argument.
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*/
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inline void Argument::setCallback(Argument::CallbackFunction callback)
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{
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m_callbackFunction = callback;
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}
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/*!
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|
* \brief Returns the secondary arguments for this argument.
|
|
*
|
|
* \sa setSecondaryArguments()
|
|
* \sa hasSecondaryArguments()
|
|
*/
|
|
inline const ArgumentVector &Argument::subArguments() const
|
|
{
|
|
return m_subArgs;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns an indication whether the argument has secondary arguments.
|
|
*
|
|
* \sa secondaryArguments()
|
|
* \sa setSecondaryArguments()
|
|
*/
|
|
inline bool Argument::hasSubArguments() const
|
|
{
|
|
return !m_subArgs.empty();
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the parents of this argument.
|
|
*
|
|
* If this argument is used as secondary argument, the arguments which
|
|
* contain this argument as secondary arguments are returned
|
|
* as "parents" of this argument.
|
|
*
|
|
* If this argument is used as a main argument shouldn't be used as
|
|
* secondary argument at the same time and thus have no parents.
|
|
*/
|
|
inline const ArgumentVector Argument::parents() const
|
|
{
|
|
return m_parents;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns an indication whether the argument is used as main argument.
|
|
*
|
|
* An argument used as main argument shouldn't be used as secondary
|
|
* arguments at the same time.
|
|
*/
|
|
inline bool Argument::isMainArgument() const
|
|
{
|
|
return m_isMainArg;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the items to be considered when generating completion for the values.
|
|
*/
|
|
inline ValueCompletionBehavior Argument::valueCompletionBehaviour() const
|
|
{
|
|
return m_valueCompletionBehavior;
|
|
}
|
|
|
|
/*!
|
|
* \brief Sets the items to be considered when generating completion for the values.
|
|
*/
|
|
inline void Argument::setValueCompletionBehavior(ValueCompletionBehavior completionValues)
|
|
{
|
|
m_valueCompletionBehavior = completionValues;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the assigned values used when generating completion for the values.
|
|
*/
|
|
inline const char *Argument::preDefinedCompletionValues() const
|
|
{
|
|
return m_preDefinedCompletionValues;
|
|
}
|
|
|
|
/*!
|
|
* \brief Assignes the values to be used when generating completion for the values.
|
|
*/
|
|
inline void Argument::setPreDefinedCompletionValues(const char *preDefinedCompletionValues)
|
|
{
|
|
m_preDefinedCompletionValues = preDefinedCompletionValues;
|
|
}
|
|
|
|
/*!
|
|
* \brief Resets occurrences (indices, values and paths).
|
|
*/
|
|
inline void Argument::reset()
|
|
{
|
|
m_occurances.clear();
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the main arguments.
|
|
* \sa setMainArguments()
|
|
*/
|
|
inline const ArgumentVector &ArgumentParser::mainArguments() const
|
|
{
|
|
return m_mainArgs;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the actual number of arguments that could be found when parsing.
|
|
*/
|
|
inline unsigned int ArgumentParser::actualArgumentCount() const
|
|
{
|
|
return m_actualArgc;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the name of the current executable.
|
|
*/
|
|
inline const char *ArgumentParser::executable() const
|
|
{
|
|
return m_executable;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns how unknown arguments are treated.
|
|
*
|
|
* The default value is UnknownArgumentBehavior::Fail.
|
|
*/
|
|
inline UnknownArgumentBehavior ArgumentParser::unknownArgumentBehavior() const
|
|
{
|
|
return m_unknownArgBehavior;
|
|
}
|
|
|
|
/*!
|
|
* \brief Sets how unknown arguments are treated.
|
|
*
|
|
* The default value is UnknownArgumentBehavior::Fail.
|
|
*/
|
|
inline void ArgumentParser::setUnknownArgumentBehavior(UnknownArgumentBehavior behavior)
|
|
{
|
|
m_unknownArgBehavior = behavior;
|
|
}
|
|
|
|
/*!
|
|
* \brief Returns the default argument.
|
|
* \remarks The default argument is assumed to be present if no other arguments have been specified.
|
|
*/
|
|
inline Argument *ArgumentParser::defaultArgument() const
|
|
{
|
|
return m_defaultArg;
|
|
}
|
|
|
|
/*!
|
|
* \brief Sets the default argument.
|
|
* \remarks The default argument is assumed to be present if no other arguments have been specified.
|
|
*/
|
|
inline void ArgumentParser::setDefaultArgument(Argument *argument)
|
|
{
|
|
m_defaultArg = argument;
|
|
}
|
|
|
|
class LIB_EXPORT HelpArgument : public Argument
|
|
{
|
|
public:
|
|
HelpArgument(ArgumentParser &parser);
|
|
};
|
|
|
|
}
|
|
|
|
#endif // APPLICATION_UTILITIES_ARGUMENTPARSER_H
|