diff options
| -rw-r--r-- | Makefile | 3 | ||||
| -rw-r--r-- | debian/changelog | 1 | ||||
| -rw-r--r-- | debian/libreichwein-dev.install | 1 | ||||
| -rw-r--r-- | programopts.cpp | 84 | ||||
| -rw-r--r-- | programopts.h | 29 |
5 files changed, 118 insertions, 0 deletions
@@ -24,6 +24,7 @@ PROGSRC=\ mime.cpp \ os.cpp \ process.cpp \ + programopts.cpp \ stringhelper.cpp \ tempfile.cpp \ url.cpp \ @@ -114,6 +115,8 @@ os.cpp \ os.h \ process.cpp \ process.h \ +programopts.cpp \ +programopts.h \ remote-install.sh \ stringhelper.cpp \ stringhelper.h \ diff --git a/debian/changelog b/debian/changelog index 5481d63..1ada900 100644 --- a/debian/changelog +++ b/debian/changelog @@ -1,6 +1,7 @@ libreichwein (1.6) UNRELEASED; urgency=medium * Fixed dependencies + * Added programopts.h -- Roland Reichwein <mail@reichwein.it> Sun, 07 Jan 2024 20:37:30 +0100 diff --git a/debian/libreichwein-dev.install b/debian/libreichwein-dev.install index dc2511d..65a3203 100644 --- a/debian/libreichwein-dev.install +++ b/debian/libreichwein-dev.install @@ -4,6 +4,7 @@ usr/include/libreichwein/file.h usr/include/libreichwein/mime.h usr/include/libreichwein/os.h usr/include/libreichwein/process.h +usr/include/libreichwein/programopts.h usr/include/libreichwein/stringhelper.h usr/include/libreichwein/tempfile.h usr/include/libreichwein/url.h diff --git a/programopts.cpp b/programopts.cpp new file mode 100644 index 0000000..81f1be9 --- /dev/null +++ b/programopts.cpp @@ -0,0 +1,84 @@ +#include "programopts.h" + +#include <algorithm> +#include <iterator> + +using namespace std::string_literals; + +namespace { + struct PrefixCmp + { + bool operator()(const std::string& lhs, const std::string& rhs) const + { + return !(lhs.starts_with(rhs) || rhs.starts_with(lhs)) && lhs < rhs; + } + }; +} + +struct Reichwein::ProgramOpts::impl +{ + int m_argc; + char** m_argv; + std::string m_programName; + std::vector<std::string> m_parameters; + std::map<std::string, std::function<bool(const std::string&)>, PrefixCmp> m_option_prefixes; +}; + +Reichwein::ProgramOpts::ProgramOpts(int argc, char* argv[], std::map<std::string, std::function<bool(const std::string&)>>& option_prefixes): + m_pimpl(std::make_unique<impl>()) +{ + m_pimpl->m_argc = argc; + m_pimpl->m_argv = argv; + if (m_pimpl->m_argc >= 1) + m_pimpl->m_programName = m_pimpl->m_argv[0]; + //std::copy(option_prefixes.begin(), option_prefixes.end(), std::inserter(m_pimpl->m_option_prefixes, std::next(m_pimpl->m_option_prefixes.begin()))); +} + +Reichwein::ProgramOpts::~ProgramOpts() +{ +} + +void Reichwein::ProgramOpts::process() +{ + for (int i = 1; i < m_pimpl->m_argc; i++) { + std::string arg{ m_pimpl->m_argv[i] }; + if (arg.size() == 0) + throw std::runtime_error("Empty option #"s + std::to_string(i)); + + if (arg[0] != '-') { // non-option parameter + m_pimpl->m_parameters.push_back(arg); + } else { + auto prefix_iterator = m_pimpl->m_option_prefixes.find(arg); + if (prefix_iterator == m_pimpl->m_option_prefixes.end()) + throw std::runtime_error("Unknown option: "s + arg); + auto& [prefix, f] = *prefix_iterator; + std::string optional_parameter; + bool parameter_provided{ false }; + + if (prefix.size() < arg.size()) { + optional_parameter = arg.substr(prefix.size()); + } else { + if (i < m_pimpl->m_argc - 1) + optional_parameter = m_pimpl->m_argv[i + 1]; + if (optional_parameter.size() > 0 && optional_parameter[0] == '-') + optional_parameter = ""; + else + parameter_provided = true; + } + bool parameter_consumed = f(optional_parameter); // call the function from the map + if (parameter_provided && parameter_consumed) + i++; // skip parameter + } + } +} + +std::string Reichwein::ProgramOpts::programName() +{ + return m_pimpl->m_programName; +} + +std::vector<std::string> Reichwein::ProgramOpts::nonOptionArguments() +{ + return m_pimpl->m_parameters; +} + diff --git a/programopts.h b/programopts.h new file mode 100644 index 0000000..442d3b0 --- /dev/null +++ b/programopts.h @@ -0,0 +1,29 @@ +// Parse command line options of program + +#pragma once + +#include <functional> +#include <map> +#include <memory> +#include <string> +#include <vector> + +#define EXPORT __attribute__((visibility("default"))) + +namespace Reichwein { + +class EXPORT ProgramOpts +{ +public: + // Processing of options in lambdas: each do return true iff parameter was consumed + ProgramOpts(int argc, char* argv[], std::map<std::string, std::function<bool(const std::string&)>>& option_prefixes); + ~ProgramOpts(); + void process(); // must be called to run functions per option, given to ctor + std::string programName(); + std::vector<std::string> nonOptionArguments(); +private: + struct impl; + std::unique_ptr<impl> m_pimpl; +}; + +} // namespace |