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partial rewrite on parsing 

- will move new one to replace old one in next commit
- basically the same code but works
- args now support arg_data_t as a default
- arg_data_t is now much smarter
v1
Brett 2023-08-07 16:12:43 -04:00
parent 7bf9cdc19b
commit b083245ab4
15 changed files with 1195 additions and 633 deletions
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Start testing: Aug 05 21:40 EDT
----------------------------------------------------------
End testing: Aug 03 01:51 EDT
End testing: Aug 05 21:40 EDT

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@ -119,6 +119,13 @@ build CMakeFiles/BLT.dir/src/blt/parse/argparse.cpp.o: CXX_COMPILER__BLT_unscann
OBJECT_DIR = CMakeFiles/BLT.dir
OBJECT_FILE_DIR = CMakeFiles/BLT.dir/src/blt/parse
build CMakeFiles/BLT.dir/src/blt/parse/argparse_2.cpp.o: CXX_COMPILER__BLT_unscanned_RelWithDebInfo /home/brett/Documents/code/c++/BLT/src/blt/parse/argparse_2.cpp || cmake_object_order_depends_target_BLT
DEP_FILE = CMakeFiles/BLT.dir/src/blt/parse/argparse_2.cpp.o.d
FLAGS = -O2 -g -DNDEBUG -std=gnu++20 -fdiagnostics-color=always -Wall -Wextra -Wpedantic
INCLUDES = -I/home/brett/Documents/code/c++/BLT/libraries/parallel-hashmap -I/home/brett/Documents/code/c++/BLT/include -I/home/brett/Documents/code/c++/BLT/cmake-build-reldebug-asan/config
OBJECT_DIR = CMakeFiles/BLT.dir
OBJECT_FILE_DIR = CMakeFiles/BLT.dir/src/blt/parse
# =============================================================================
# Link build statements for STATIC_LIBRARY target BLT
@ -127,7 +134,7 @@ build CMakeFiles/BLT.dir/src/blt/parse/argparse.cpp.o: CXX_COMPILER__BLT_unscann
#############################################
# Link the static library libBLT.a
build libBLT.a: CXX_STATIC_LIBRARY_LINKER__BLT_RelWithDebInfo CMakeFiles/BLT.dir/src/blt/std/filesystem.cpp.o CMakeFiles/BLT.dir/src/blt/std/format.cpp.o CMakeFiles/BLT.dir/src/blt/std/loader.cpp.o CMakeFiles/BLT.dir/src/blt/std/logging.cpp.o CMakeFiles/BLT.dir/src/blt/std/string.cpp.o CMakeFiles/BLT.dir/src/blt/std/system.cpp.o CMakeFiles/BLT.dir/src/blt/profiling/profiler.cpp.o CMakeFiles/BLT.dir/src/blt/nbt/nbt.cpp.o CMakeFiles/BLT.dir/src/blt/nbt/nbt_block.cpp.o CMakeFiles/BLT.dir/src/blt/parse/argparse.cpp.o
build libBLT.a: CXX_STATIC_LIBRARY_LINKER__BLT_RelWithDebInfo CMakeFiles/BLT.dir/src/blt/std/filesystem.cpp.o CMakeFiles/BLT.dir/src/blt/std/format.cpp.o CMakeFiles/BLT.dir/src/blt/std/loader.cpp.o CMakeFiles/BLT.dir/src/blt/std/logging.cpp.o CMakeFiles/BLT.dir/src/blt/std/string.cpp.o CMakeFiles/BLT.dir/src/blt/std/system.cpp.o CMakeFiles/BLT.dir/src/blt/profiling/profiler.cpp.o CMakeFiles/BLT.dir/src/blt/nbt/nbt.cpp.o CMakeFiles/BLT.dir/src/blt/nbt/nbt_block.cpp.o CMakeFiles/BLT.dir/src/blt/parse/argparse.cpp.o CMakeFiles/BLT.dir/src/blt/parse/argparse_2.cpp.o
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138
include/blt/parse/argparse.h
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@ -13,6 +13,7 @@
#include <optional>
#include <blt/std/hashmap.h>
#include <variant>
#include <blt/std/logging.h>
namespace blt::parser {
@ -39,9 +40,9 @@ namespace blt::parser {
private:
std::vector<std::string> names;
std::vector<std::string> flags;
bool isFlags = false;
void insertAndSort(const std::string& str);
public:
arg_vector_t() = default;
@ -77,52 +78,30 @@ namespace blt::parser {
return flags;
}
struct equals {
bool operator()(const arg_vector_t& a1, const arg_vector_t& a2) const {
// arg cannot have both
if (!a1.names.empty()) {
// match all pos arg
return std::ranges::all_of(a1.names, [&a2](const auto& n) -> bool {
if (std::find(a2.names.begin(), a2.names.end(), n) == a2.names.end())
return false;
return true;
});
} else {
// match any flag (--foo or -f)
return std::ranges::all_of(a1.flags, [&a2](const auto& f) -> bool {
if (std::find(a2.flags.begin(), a2.flags.end(), f) != a2.flags.end())
return true;
return false;
});
}
}
};
/**
* @return true if contains flags
*/
[[nodiscard]] inline bool isFlag() const {
return isFlags;
}
struct hash {
size_t operator()(const arg_vector_t& a) const {
size_t v = 0;
std::hash<std::string> hash;
for (const auto& n : a.names) {
v >>= 8;
v += hash(n);
}
for (const auto& f : a.flags) {
v >>= 8;
v += hash(f);
}
return v;
}
};
[[nodiscard]] inline bool contains(std::string_view string) const {
return std::any_of(flags.begin(), flags.end(), [&string](const auto& flag) -> bool {
return flag == string;
}) || std::any_of(names.begin(), names.end(), [&string](const auto& name) -> bool {
return name == string;
});
}
};
class arg_nargs_t {
private:
friend class argparse;
friend class arg_parse;
static constexpr int UNKNOWN = 0x1;
static constexpr int ALL = 0x2;
static constexpr int ALL_REQUIRED = 0x4;
// 0 means default behaviour (consume 1 if presented otherwise ignore)
int args = 0;
// 0 means ignore
int args = 1;
// 0 indicates args is used
int flags = 0;
@ -153,7 +132,7 @@ namespace blt::parser {
public:
arg_vector_t a_flags;
arg_action_t a_action = arg_action_t::STORE;
arg_nargs_t a_nargs = 0;
arg_nargs_t a_nargs = 1;
std::string a_const{};
std::string a_default{};
std::string a_dest{};
@ -163,6 +142,62 @@ namespace blt::parser {
bool a_required = false;
};
class arg_builder {
arg_properties_t properties;
public:
arg_builder(const arg_vector_t& flags): properties(flags) {}
inline arg_properties_t build() {
return properties;
}
inline arg_builder& setAction(arg_action_t action){
properties.a_action = action;
return *this;
}
inline arg_builder& setNArgs(const arg_nargs_t& nargs){
properties.a_nargs = nargs;
return *this;
}
inline arg_builder& setConst(const std::string& a_const){
properties.a_const = a_const;
return *this;
}
inline arg_builder& setDefault(const std::string& def){
properties.a_default = def;
return *this;
}
inline arg_builder& setDest(const std::string& dest){
properties.a_dest = dest;
return *this;
}
inline arg_builder& setHelp(const std::string& help){
properties.a_help = help;
return *this;
}
inline arg_builder& setVersion(const std::string& version){
properties.a_version = version;
return *this;
}
inline arg_builder& setMetavar(const std::string& metavar){
properties.a_metavar = metavar;
return *this;
}
inline arg_builder& setRequired(){
properties.a_required = true;
return *this;
}
};
class arg_tokenizer_t {
private:
static constexpr char FLAG = '-';
@ -207,38 +242,41 @@ namespace blt::parser {
}
};
class argparse {
class arg_parse {
public:
typedef std::variant<std::string, bool, int32_t, std::vector<std::string>> arg_data_t;
private:
struct {
friend argparse;
friend arg_parse;
private:
std::vector<arg_properties_t> arg_storage;
public:
std::vector<std::pair<std::string, arg_properties_t*>> name_associations;
HASHMAP<std::string, arg_properties_t*> flag_associations;
HASHSET<arg_vector_t, arg_vector_t::hash, arg_vector_t::equals> required_vars;
HASHSET<std::string> required_vars;
} user_args;
struct arg_results {
friend argparse;
friend arg_parse;
private:
HASHSET<arg_vector_t, arg_vector_t::hash, arg_vector_t::equals> found_required;
HASHSET<std::string> found_required;
std::vector<std::string> unrecognized_args;
public:
std::string program_name;
HASHMAP <arg_vector_t, arg_data_t, arg_vector_t::hash, arg_vector_t::equals> positional_args;
HASHMAP <arg_vector_t, arg_data_t, arg_vector_t::hash, arg_vector_t::equals> flag_args;
HASHMAP <std::string, arg_data_t> positional_args;
HASHMAP <std::string, arg_data_t> flag_args;
} loaded_args;
private:
static std::string filename(const std::string& path);
static bool validateArgument(const arg_properties_t& args);
static bool consumeArguments(arg_tokenizer_t& arg_tokenizer, const arg_properties_t& properties, std::vector<std::string>& v);
static bool consumeArguments(arg_tokenizer_t& arg_tokenizer, const arg_properties_t& properties, std::vector<std::string>& v_out);
void handlePositionalArgument(arg_tokenizer_t& arg_tokenizer, size_t& last_pos);
void handleFlagArgument(arg_tokenizer_t& arg_tokenizer);
void processFlag(arg_tokenizer_t& arg_tokenizer, const std::string& flag);
public:
argparse() = default;
arg_parse() {
//addArgument(arg_builder({"--help", "-h"}).setAction(arg_action_t::HELP).setHelp("Show this help menu").build());
};
void addArgument(const arg_properties_t& args);
@ -247,6 +285,8 @@ namespace blt::parser {
void printHelp();
};
std::string to_string(const blt::parser::arg_parse::arg_data_t& v);
}
#endif //BLT_TESTS_ARGPARSE_H

337
include/blt/parse/argparse_2.h Normal file
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@ -0,0 +1,337 @@
/*
* Created by Brett on 06/08/23.
* Licensed under GNU General Public License V3.0
* See LICENSE file for license detail
*/
#ifndef BLT_TESTS_ARGPARSE_2_H
#define BLT_TESTS_ARGPARSE_2_H
#include <utility>
#include <vector>
#include <string>
#include <initializer_list>
#include <optional>
#include <blt/std/hashmap.h>
#include <variant>
namespace blt
{
typedef std::variant<std::string, bool, int32_t> arg_data_internal_t;
typedef std::vector<arg_data_internal_t> arg_data_vec_t;
typedef std::variant<arg_data_internal_t, arg_data_vec_t> arg_data_t;
enum class arg_action_t
{
STORE,
STORE_CONST,
STORE_TRUE,
STORE_FALSE,
APPEND,
APPEND_CONST,
COUNT,
HELP,
VERSION,
EXTEND
};
class arg_vector_t
{
friend class arg_parse;
private:
std::vector<std::string> flags;
std::string name;
void validateFlags();
public:
arg_vector_t(std::vector<std::string> flags): flags(std::move(flags))
{
validateFlags();
}
arg_vector_t(std::initializer_list<std::string> flags): flags(flags)
{
validateFlags();
}
arg_vector_t(const char* str);
arg_vector_t(const std::string& str);
[[nodiscard]] inline bool isFlag() const
{
return !flags.empty();
}
[[nodiscard]] inline bool contains(const std::string& str)
{
return std::any_of(
flags.begin(), flags.end(), [&str](const std::string& flag) -> bool {
return flag == str;
}
) || str == name;
}
};
class arg_nargs_t
{
friend class arg_parse;
private:
static constexpr int UNKNOWN = 0x1;
static constexpr int ALL = 0x2;
static constexpr int ALL_REQUIRED = 0x4;
// 0 means ignore
int args = 1;
// 0 indicates args is used
int flags = 0;
void decode(char c);
public:
arg_nargs_t() = default;
arg_nargs_t(int args): args(args)
{}
arg_nargs_t(char c);
arg_nargs_t(std::string s);
arg_nargs_t(const char* s);
};
struct arg_properties_t
{
private:
public:
arg_vector_t a_flags;
arg_action_t a_action = arg_action_t::STORE;
arg_nargs_t a_nargs = 1;
std::string a_const{};
arg_data_internal_t a_default{};
std::string a_dest{};
std::string a_help{};
std::string a_version{};
std::string a_metavar{};
bool a_required = true;
};
class arg_builder
{
arg_properties_t properties;
public:
arg_builder(const arg_vector_t& flags): properties(flags)
{}
inline arg_properties_t build()
{
return properties;
}
inline arg_builder& setAction(arg_action_t action)
{
properties.a_action = action;
return *this;
}
inline arg_builder& setNArgs(const arg_nargs_t& nargs)
{
properties.a_nargs = nargs;
return *this;
}
inline arg_builder& setConst(const std::string& a_const)
{
properties.a_const = a_const;
return *this;
}
inline arg_builder& setDefault(const arg_data_internal_t& def)
{
properties.a_default = def;
return *this;
}
inline arg_builder& setDest(const std::string& dest)
{
properties.a_dest = dest;
return *this;
}
inline arg_builder& setHelp(const std::string& help)
{
properties.a_help = help;
return *this;
}
inline arg_builder& setVersion(const std::string& version)
{
properties.a_version = version;
return *this;
}
inline arg_builder& setMetavar(const std::string& metavar)
{
properties.a_metavar = metavar;
return *this;
}
inline arg_builder& setRequired()
{
properties.a_required = true;
return *this;
}
};
class arg_tokenizer
{
private:
std::vector<std::string> args;
size_t currentIndex = 0;
public:
arg_tokenizer(std::vector<std::string> args): args(std::move(args))
{}
// returns the current arg
inline const std::string& get()
{
return args[currentIndex];
}
// returns if we have next arg to process
inline bool hasNext()
{
return currentIndex + 1 < args.size();
}
inline bool hasCurrent()
{
return currentIndex < args.size();
}
// returns true if the current arg is a flag
inline bool isFlag()
{
return args[currentIndex].starts_with('-');
}
// returns true if we have next and the next arg is a flag
inline bool isNextFlag()
{
return hasNext() && args[currentIndex + 1].starts_with('-');
}
// advances to the next flag
inline size_t advance()
{
return currentIndex++;
}
};
class arg_parse
{
private:
struct
{
friend arg_parse;
private:
std::vector<arg_properties_t*> arg_properties_storage;
public:
std::vector<arg_properties_t*> name_associations;
HASHMAP<std::string, arg_properties_t*> flag_associations;
} user_args;
struct arg_results
{
friend arg_parse;
private:
HASHSET<std::string> found_args;
std::vector<std::string> unrecognized_args;
public:
std::string program_name;
HASHMAP<std::string, arg_data_t> data;
inline arg_data_t& operator[](const std::string& key)
{
return data[key];
}
inline auto begin()
{
return data.begin();
}
inline auto end()
{
return data.end();
}
inline bool contains(const std::string& key)
{
return data.find(key) != data.end();
}
} loaded_args;
private:
static std::string filename(const std::string& path);
// expects that the current flag has already been consumed (advanced past), leaves tokenizer in a state where the next element is 'current'
static bool consumeArguments(arg_tokenizer& tokenizer, const arg_properties_t& properties, std::vector<arg_data_internal_t>& v_out);
void handlePositionalArgument(arg_tokenizer& tokenizer, size_t& last_pos);
void handleFlagArgument(arg_tokenizer& tokenizer);
void processFlag(arg_tokenizer& tokenizer, const std::string& flag);
template<typename T>
static inline bool holds_alternative(const arg_data_t& v){
if constexpr (std::is_same_v<T, arg_data_vec_t>)
return std::holds_alternative<T>(v);
else
{
if (std::holds_alternative<arg_data_internal_t>(v))
{
arg_data_internal_t data = std::get<arg_data_internal_t>(v);
return std::holds_alternative<T>(data);
} else
return false;
}
}
template<typename T>
static inline T& get(arg_data_t& v){
if constexpr (std::is_same_v<T, arg_data_vec_t>)
return std::get<arg_data_vec_t>(v);
else
return std::get<T>(std::get<arg_data_internal_t>(v));
}
public:
arg_parse()
{
addArgument(arg_builder({"--help", "-h"}).setAction(arg_action_t::HELP).setHelp("Show this help menu").build());
};
void addArgument(const arg_properties_t& args);
arg_results parse_args(int argc, const char** argv);
arg_results parse_args(const std::vector<std::string>& args);
void printHelp();
~arg_parse()
{
for (auto* p : user_args.arg_properties_storage)
delete p;
}
};
std::string to_string(const blt::arg_data_t& v);
std::string to_string(const blt::arg_data_internal_t& v);
}
#endif //BLT_TESTS_ARGPARSE_2_H

636
src/blt/parse/argparse.cpp
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@ -3,299 +3,349 @@
* Licensed under GNU General Public License V3.0
* See LICENSE file for license detail
*/
#include <blt/parse/argparse.h>
#include "blt/std/logging.h"
#include <blt/std/string.h>
namespace blt::parser {
arg_vector_t::arg_vector_t(const std::vector<std::string>& args) {
for (auto& arg : args)
insertAndSort(arg);
}
arg_vector_t::arg_vector_t(std::initializer_list<std::string> args) {
for (auto& arg : args)
insertAndSort(arg);
}
arg_vector_t::arg_vector_t(const std::string& arg) {
insertAndSort(arg);
}
arg_vector_t::arg_vector_t(const char* arg) {
insertAndSort(arg);
}
arg_vector_t& arg_vector_t::operator=(const std::string& arg) {
insertAndSort(arg);
return *this;
}
arg_vector_t& arg_vector_t::operator=(const char* arg) {
insertAndSort(arg);
return *this;
}
arg_vector_t& arg_vector_t::operator=(std::initializer_list<std::string>& args) {
for (auto& arg : args)
insertAndSort(arg);
return *this;
}
arg_vector_t& arg_vector_t::operator=(std::vector<std::string>& args) {
for (auto& arg : args)
insertAndSort(arg);
return *this;
}
void arg_vector_t::insertAndSort(const std::string& str) {
if (str.starts_with('-'))
flags.push_back(str);
else
names.push_back(str);
}
arg_nargs_t::arg_nargs_t(char c) {
decode(c);
}
arg_nargs_t::arg_nargs_t(std::string s) {
decode(s[0]);
}
arg_nargs_t::arg_nargs_t(const char* s) {
decode(*s);
}
arg_nargs_t& arg_nargs_t::operator=(const std::string& s) {
decode(s[0]);
return *this;
}
arg_nargs_t& arg_nargs_t::operator=(char c) {
decode(c);
return *this;
}
arg_nargs_t& arg_nargs_t::operator=(int a) {
args = a;
return *this;
}
arg_nargs_t& arg_nargs_t::operator=(const char* s) {
decode(*s);
return *this;
}
void arg_nargs_t::decode(char c) {
if (c == '?')
flags = UNKNOWN;
else if (c == '+')
flags = ALL_REQUIRED;
else if (c == '*')
flags = ALL;
else
flags = 0;
}
arg_tokenizer_t::arg_tokenizer_t(size_t argc, const char** argv) {
for (size_t i = 0; i < argc; i++)
args.emplace_back(argv[i]);
}
bool argparse::validateArgument(const arg_properties_t& args) {
return !args.a_flags.getFlags().empty() ^ !args.a_flags.getNames().empty();
}
void argparse::addArgument(const arg_properties_t& args) {
if (!validateArgument(args)) {
BLT_WARN("Argument contains both flags and positional names, this is not allowed!");
BLT_WARN("(Discarding argument)");
return;
}
// store one copy of the properties (arg properties could in theory be very large!)
auto pos = user_args.arg_storage.size();
user_args.arg_storage.push_back(args);
auto& arg = user_args.arg_storage[pos];
// associate the arg properties per name and flag to allow for quick access when parsing
auto& names = args.a_flags.getNames();
for (const auto& name : names)
user_args.name_associations.emplace_back(name, &arg);
auto& flags = args.a_flags.getFlags();
for (const auto& flag : flags)
user_args.flag_associations[flag] = &arg;
if (args.a_required)
user_args.required_vars.insert(args.a_flags);
if (args.a_nargs.flags == arg_nargs_t::UNKNOWN) {
if (args.a_flags.getNames().empty())
loaded_args.flag_args[args.a_flags] = args.a_default;
else
loaded_args.positional_args[args.a_flags] = args.a_default;
}
}
const argparse::arg_results& argparse::parse_args(int argc, const char** argv) {
loaded_args = {};
arg_tokenizer_t arg_tokenizer(argc, argv);
loaded_args.program_name = arg_tokenizer.next();
BLT_TRACE("Loading args for %s", loaded_args.program_name.c_str());
size_t last_positional = 0;
while (arg_tokenizer.hasNext()) {
// a token isn't a flag it must be a positional arg as flags will consume nargs
if (!arg_tokenizer.isFlag()){
handlePositionalArgument(arg_tokenizer, last_positional);
continue;
}
handleFlagArgument(arg_tokenizer);
}
return loaded_args;
}
void argparse::printHelp() {
}
void argparse::handlePositionalArgument(arg_tokenizer_t& arg_tokenizer, size_t& last_pos) {
// TODO:
loaded_args.positional_args[user_args.name_associations[last_pos++].first] = arg_tokenizer.next();
}
void argparse::handleFlagArgument(arg_tokenizer_t& arg_tokenizer) {
// token is a flag, find out special information about it
auto flag = arg_tokenizer.next();
if (flag.starts_with("--"))
processFlag(arg_tokenizer, flag);
else {
// handle special args like -vvv
if (!flag.starts_with('-'))
BLT_TRACE("Flag processed but does not start with '-'!");
// size without -
auto len = flag.size()-1;
// get flag type
std::string str = "- ";
str[1] = flag[1];
for (size_t i = 0; i < len; i++)
processFlag(arg_tokenizer, str);
}
}
void argparse::processFlag(arg_tokenizer_t& arg_tokenizer, const std::string& flag) {
auto loc = user_args.flag_associations.find(flag);
if (loc == user_args.flag_associations.end()){
BLT_WARN("Flag '%s' not an option!", flag.c_str());
printHelp();
return;
}
auto flag_properties = loc->second;
auto dest = flag_properties->a_dest.empty() ? flag_properties->a_flags : arg_vector_t{flag_properties->a_dest};
arg_data_t& data = loaded_args.flag_args[dest];
switch(flag_properties->a_action){
case arg_action_t::HELP:
printHelp();
break;
case arg_action_t::STORE: {
std::vector<std::string> v;
if (!consumeArguments(arg_tokenizer, *flag_properties, v))
return;
if (v.size() == 1)
data = v[0];
else
data = v;
break;
}
case arg_action_t::STORE_CONST:
data = flag_properties->a_const;
break;
case arg_action_t::STORE_FALSE:
data = false;
break;
case arg_action_t::STORE_TRUE:
data = true;
break;
case arg_action_t::COUNT: {
if (!std::holds_alternative<int32_t>(data))
data = 0;
data = std::get<int32_t>(data) + 1;
break;
}
case arg_action_t::EXTEND: {
break;
}
case arg_action_t::VERSION: {
auto file = filename(loaded_args.program_name);
BLT_INFO("%s, %s", file.c_str(), flag_properties->a_version.c_str());
break;
}
case arg_action_t::APPEND_CONST: {
if (!holds_alternative<std::vector<std::string>>(data)) {
data = std::vector<std::string>();
}
auto& l = get<std::vector<std::string>>(data);
l.emplace_back(flag_properties->a_const);
break;
}
case arg_action_t::APPEND: {
if (!holds_alternative<std::vector<std::string>>(data))
data = std::vector<std::string>();
auto& l = get<std::vector<std::string>>(data);
consumeArguments(arg_tokenizer, *flag_properties, l);
break;
}
}
}
bool argparse::consumeArguments(arg_tokenizer_t& arg_tokenizer, const arg_properties_t& properties, std::vector<std::string>& v) {
switch (properties.a_nargs.flags) {
case 0:
for (int i = 0; i < properties.a_nargs.args; i++) {
if (arg_tokenizer.isFlag()) {
BLT_WARN("Expected %d arguments, found flag instead!", properties.a_nargs.args);
return false;
}
v.emplace_back(arg_tokenizer.next());
}
return true;
case arg_nargs_t::UNKNOWN:
// no arg next
if (arg_tokenizer.isFlag()) {
if (!properties.a_const.empty())
v.emplace_back(properties.a_const);
return true;
}
v.emplace_back(arg_tokenizer.next());
return true;
case arg_nargs_t::ALL:
while (arg_tokenizer.hasNext() && !arg_tokenizer.isFlag())
v.emplace_back(arg_tokenizer.next());
return true;
case arg_nargs_t::ALL_REQUIRED:
if (arg_tokenizer.isFlag()) {
BLT_WARN("At least one argument is required!");
return false;
}
while (arg_tokenizer.hasNext() && !arg_tokenizer.isFlag())
v.emplace_back(arg_tokenizer.next());
return true;
}
return false;
}
std::string argparse::filename(const std::string& path) {
auto paths = blt::string::split(path, "/");
auto final = paths[paths.size()-1];
if (final == "/")
return paths[paths.size()-2];
return final;
}
}
//namespace blt::parser {
//
// arg_vector_t::arg_vector_t(const std::vector<std::string>& args) {
// for (auto& arg : args)
// insertAndSort(arg);
// }
//
// arg_vector_t::arg_vector_t(std::initializer_list<std::string> args) {
// for (auto& arg : args)
// insertAndSort(arg);
// }
//
// arg_vector_t::arg_vector_t(const std::string& arg) {
// insertAndSort(arg);
// }
//
// arg_vector_t::arg_vector_t(const char* arg) {
// insertAndSort(arg);
// }
//
// arg_vector_t& arg_vector_t::operator=(const std::string& arg) {
// insertAndSort(arg);
// return *this;
// }
//
// arg_vector_t& arg_vector_t::operator=(const char* arg) {
// insertAndSort(arg);
// return *this;
// }
//
// arg_vector_t& arg_vector_t::operator=(std::initializer_list<std::string>& args) {
// for (auto& arg : args)
// insertAndSort(arg);
// return *this;
// }
//
// arg_vector_t& arg_vector_t::operator=(std::vector<std::string>& args) {
// for (auto& arg : args)
// insertAndSort(arg);
// return *this;
// }
//
// void arg_vector_t::insertAndSort(const std::string& str) {
// if (str.starts_with('-')) {
// flags.push_back(str);
// isFlags = true;
// } else {
// names.push_back(str);
// isFlags = false;
// }
// if (!flags.empty() && !names.empty())
// BLT_WARN("Flags provided alongside named positional args. This is not supported!");
// }
//
// arg_nargs_t::arg_nargs_t(char c) {
// decode(c);
// }
//
// arg_nargs_t::arg_nargs_t(std::string s) {
// decode(s[0]);
// }
//
// arg_nargs_t::arg_nargs_t(const char* s) {
// decode(*s);
// }
//
// arg_nargs_t& arg_nargs_t::operator=(const std::string& s) {
// decode(s[0]);
// return *this;
// }
//
// arg_nargs_t& arg_nargs_t::operator=(char c) {
// decode(c);
// return *this;
// }
//
// arg_nargs_t& arg_nargs_t::operator=(int a) {
// args = a;
// return *this;
// }
//
// arg_nargs_t& arg_nargs_t::operator=(const char* s) {
// decode(*s);
// return *this;
// }
//
// void arg_nargs_t::decode(char c) {
// if (c == '?')
// flags = UNKNOWN;
// else if (c == '+')
// flags = ALL_REQUIRED;
// else if (c == '*')
// flags = ALL;
// else
// flags = 0;
// }
//
// arg_tokenizer_t::arg_tokenizer_t(size_t argc, const char** argv) {
// for (size_t i = 0; i < argc; i++)
// args.emplace_back(argv[i]);
// }
//
// bool arg_parse::validateArgument(const arg_properties_t& args) {
// return !(args.a_flags.getFlags().empty() ^ args.a_flags.getNames().empty());
// }
//
// void arg_parse::addArgument(const arg_properties_t& args) {
// if (validateArgument(args)) {
// BLT_WARN("Argument contains both flags and positional names, this is not allowed!");
// return;
// }
// // store one copy of the properties (arg properties could in theory be very large!)
// auto pos = user_args.arg_storage.size();
// user_args.arg_storage.push_back(args);
// auto& arg = user_args.arg_storage[pos];
// if (arg.a_dest.empty()) {
// // update dest with first full flag (same as python's behaviour)
// if (arg.a_flags.isFlag()) {
// for (const auto& flag : arg.a_flags.getFlags()) {
// if (flag.starts_with("--")) {
// arg.a_dest = flag;
// break;
// }
// }
// } else {
// for (const auto& name : arg.a_flags.getNames()) {
// arg.a_dest = name;
// break;
// }
// }
// }
// BLT_TRACE("Flag %s: %p", arg.a_dest.c_str(), &arg);
// // associate the arg properties per name and flag to allow for quick access when parsing
// auto& names = arg.a_flags.getNames();
// for (const auto& name : names) {
// user_args.name_associations.emplace_back(name, &arg);
// user_args.required_vars.insert(name);
// }
//
// auto& flags = arg.a_flags.getFlags();
// for (const auto& flag : flags)
// user_args.flag_associations[flag] = &arg;
//
// if (arg.a_required)
// user_args.required_vars.insert(arg.a_dest);
//
// if (arg.a_nargs.flags == arg_nargs_t::UNKNOWN) {
// if (arg.a_flags.getNames().empty()) {
// for (const auto& flag : arg.a_flags.getFlags())
// loaded_args.flag_args[flag] = arg.a_default;
// } else {
// for (const auto& name : arg.a_flags.getNames())
// loaded_args.positional_args[name] = arg.a_default;
// }
// }
//
// BLT_DEBUG("PRINTING: %d, %d", user_args.arg_storage[pos].a_flags.getFlags().size(), user_args.arg_storage[pos].a_flags.getNames().size());
//
// }
//
// const arg_parse::arg_results& arg_parse::parse_args(int argc, const char** argv) {
// loaded_args = {};
// arg_tokenizer_t arg_tokenizer(argc, argv);
// loaded_args.program_name = arg_tokenizer.next();
//
// size_t last_positional = 0;
// while (arg_tokenizer.hasNext()) {
// // a token isn't a flag it must be a positional arg as flags will consume nargs
// if (!arg_tokenizer.isFlag()){
// handlePositionalArgument(arg_tokenizer, last_positional);
// continue;
// }
// handleFlagArgument(arg_tokenizer);
// }
//
// if (loaded_args.unrecognized_args.empty())
// return loaded_args;
//
// std::string unrec;
// for (const auto& r : loaded_args.unrecognized_args) {
// unrec += '\'';
// unrec += r;
// unrec += '\'';
// unrec += ' ';
// }
// unrec = unrec.substr(0, unrec.size()-1);
// BLT_WARN("Unrecognized args: %s", unrec.c_str());
// printHelp();
//
// return loaded_args;
// }
//
// void arg_parse::printHelp() {
//
// }
//
// void arg_parse::handlePositionalArgument(arg_tokenizer_t& arg_tokenizer, size_t& last_pos) {
// // TODO:
// auto index = last_pos++;
// if (index >= user_args.name_associations.size())
// loaded_args.unrecognized_args.push_back(arg_tokenizer.next());
// else
// loaded_args.positional_args[user_args.name_associations[index].first] = arg_tokenizer.next();
// }
//
// void arg_parse::handleFlagArgument(arg_tokenizer_t& arg_tokenizer) {
// // token is a flag, find out special information about it
// auto flag = arg_tokenizer.next();
//
// if (flag.starts_with("--"))
// processFlag(arg_tokenizer, flag);
// else {
// // handle special args like -vvv
// if (!flag.starts_with('-'))
// BLT_TRACE("Flag processed but does not start with '-'!");
// // size without -
// auto len = flag.size()-1;
// // get flag type
// std::string str = "- ";
// str[1] = flag[1];
// for (size_t i = 0; i < len; i++)
// processFlag(arg_tokenizer, str);
// }
// }
//
// void arg_parse::processFlag(arg_tokenizer_t& arg_tokenizer, const std::string& flag) {
// auto loc = user_args.flag_associations.find(flag);
// if (loc == user_args.flag_associations.end()){
// BLT_WARN("Flag '%s' not an option!", flag.c_str());
// printHelp();
// return;
// }
//
// auto* flag_properties = loc->second;
// if (flag_properties->a_dest.empty()) {
// BLT_ERROR("Flag dest empty! %s : %d, %p", flag.c_str(), flag_properties->a_flags.getFlags().size(), flag_properties);
// return;
// }
// auto dest = flag_properties->a_dest;
//
// arg_data_t& data = loaded_args.flag_args[dest];
// switch(flag_properties->a_action){
// case arg_action_t::HELP:
// printHelp();
// break;
// case arg_action_t::STORE: {
// std::vector<std::string> v;
// if (!consumeArguments(arg_tokenizer, *flag_properties, v)) {
// printHelp();
// return;
// }
// if (v.size() == 1)
// data = v[0];
// else
// data = v;
// break;
// }
// case arg_action_t::STORE_CONST:
// data = flag_properties->a_const;
// break;
// case arg_action_t::STORE_FALSE:
// data = false;
// break;
// case arg_action_t::STORE_TRUE:
// data = true;
// break;
// case arg_action_t::COUNT: {
// if (!std::holds_alternative<int32_t>(data))
// data = 0;
// data = std::get<int32_t>(data) + 1;
// break;
// }
// case arg_action_t::EXTEND: {
//
// break;
// }
// case arg_action_t::VERSION: {
// auto file = filename(loaded_args.program_name);
// BLT_INFO("%s, %s", file.c_str(), flag_properties->a_version.c_str());
// break;
// }
// case arg_action_t::APPEND_CONST: {
// if (!holds_alternative<std::vector<std::string>>(data)) {
// data = std::vector<std::string>();
// }
// auto& l = get<std::vector<std::string>>(data);
// l.emplace_back(flag_properties->a_const);
// break;
// }
// case arg_action_t::APPEND: {
// if (!holds_alternative<std::vector<std::string>>(data))
// data = std::vector<std::string>();
// auto& l = get<std::vector<std::string>>(data);
// consumeArguments(arg_tokenizer, *flag_properties, l);
// break;
// }
// }
// }
//
// bool arg_parse::consumeArguments(arg_tokenizer_t& arg_tokenizer, const arg_properties_t& properties, std::vector<std::string>& v_out) {
// switch (properties.a_nargs.flags) {
// case 0:
// for (int i = 0; i < properties.a_nargs.args; i++) {
// if (!arg_tokenizer.hasNext()){
// BLT_WARN("Expected %d arguments got %d instead!", properties.a_nargs.args, i);
// return false;
// }
// if (arg_tokenizer.isFlag()) {
// BLT_WARN("Expected %d arguments, found flag instead!", properties.a_nargs.args);
// return false;
// }
// v_out.emplace_back(arg_tokenizer.next());
// }
// return true;
// case arg_nargs_t::UNKNOWN:
// // no arg next
// if (!arg_tokenizer.hasNext() || arg_tokenizer.isFlag()) {
// if (!properties.a_const.empty())
// v_out.emplace_back(properties.a_const);
// else
// v_out.emplace_back(properties.a_default);
// return true;
// }
// v_out.emplace_back(arg_tokenizer.next());
// return true;
// case arg_nargs_t::ALL:
// while (arg_tokenizer.hasNext() && !arg_tokenizer.isFlag())
// v_out.emplace_back(arg_tokenizer.next());
// return true;
// case arg_nargs_t::ALL_REQUIRED:
// if (arg_tokenizer.isFlag()) {
// BLT_WARN("At least one argument is required!");
// return false;
// }
// while (arg_tokenizer.hasNext() && !arg_tokenizer.isFlag())
// v_out.emplace_back(arg_tokenizer.next());
// return true;
// }
// return false;
// }
//
//}

393
src/blt/parse/argparse_2.cpp Normal file
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@ -0,0 +1,393 @@
/*
* Created by Brett on 06/08/23.
* Licensed under GNU General Public License V3.0
* See LICENSE file for license detail
*/
#include <blt/parse/argparse_2.h>
#include <blt/std/logging.h>
#include <blt/std/string.h>
namespace blt
{
void arg_nargs_t::decode(char c)
{
if (c == '?')
flags = UNKNOWN;
else if (c == '+')
flags = ALL_REQUIRED;
else if (c == '*')
flags = ALL;
else
flags = 0;
}
arg_nargs_t::arg_nargs_t(char c)
{
decode(c);
}
arg_nargs_t::arg_nargs_t(std::string s)
{
decode(s[0]);
}
arg_nargs_t::arg_nargs_t(const char* s)
{
decode(*s);
}
class invalid_argument_exception : public std::runtime_error
{
public:
invalid_argument_exception(const std::string& str): std::runtime_error(str)
{}
};
void arg_vector_t::validateFlags()
{
for (const auto& flag : flags)
if (!flag.starts_with('-'))
throw invalid_argument_exception("Flag '" + flag + "' must start with - or --");
}
arg_vector_t::arg_vector_t(const char* str) {
std::string as_string(str);
if (as_string.starts_with('-'))
flags.emplace_back(as_string);
else
name = as_string;
}
arg_vector_t::arg_vector_t(const std::string& str) {
if (str.starts_with('-'))
flags.emplace_back(str);
else
name = str;
}
std::string to_string(const arg_data_t& v)
{
if (holds_alternative<arg_data_internal_t>(v))
return to_string(std::get<arg_data_internal_t>(v));
else if (std::holds_alternative<arg_data_vec_t>(v))
{
const auto& vec = std::get<arg_data_vec_t>(v);
if (vec.size() == 1)
return to_string(vec[0]);
if (vec.empty())
return "Empty Vector";
std::string str;
for (const auto& r : vec)
{
str += to_string(r);
str += ' ';
}
return "Vector of contents: " + str;
}
return "Empty";
}
std::string to_string(const arg_data_internal_t& v)
{
if (std::holds_alternative<std::string>(v)){
return std::get<std::string>(v);
} else if (std::holds_alternative<bool>(v)) {
return std::get<bool>(v) ? "True" : "False";
}
return std::to_string(std::get<int32_t>(v));
}
std::string arg_parse::filename(const std::string& path)
{
auto paths = blt::string::split(path, "/");
auto final = paths[paths.size() - 1];
if (final == "/")
return paths[paths.size() - 2];
return final;
}
void arg_parse::addArgument(const arg_properties_t& args)
{
auto properties = new arg_properties_t(args);
// determine where to store the arg when parsing
if (properties->a_dest.empty())
{
if (properties->a_flags.isFlag())
{
// take first arg so a_dest exists, could be - or --
properties->a_dest = properties->a_flags.flags[0];
// look for a -- arg (python's behaviour)
for (const auto& flag : properties->a_flags.flags)
{
if (flag.starts_with("--"))
{
properties->a_dest = flag;
break;
}
}
} else
properties->a_dest = properties->a_flags.name;
}
// associate flags with their properties
for (const auto& flag : properties->a_flags.flags)
user_args.flag_associations[flag] = properties;
// positional args uses index (vector) to store the properties
if (!properties->a_flags.isFlag())
user_args.name_associations.push_back(properties);
user_args.arg_properties_storage.push_back(properties);
}
bool arg_parse::consumeArguments(arg_tokenizer& tokenizer, const arg_properties_t& properties, std::vector<arg_data_internal_t>& v_out)
{
switch (properties.a_nargs.flags)
{
case 0:
for (int i = 0; i < properties.a_nargs.args; i++)
{
// if we don't have another arg to consume we have a problem!
if (!tokenizer.hasCurrent())
{
BLT_WARN("Expected %d arguments got %d instead!", properties.a_nargs.args, i);
return false;
}
// if we do have one, but it is a flag then we also have a problem!
if (tokenizer.isFlag())
{
BLT_WARN("Expected %d arguments, found flag instead!", properties.a_nargs.args);
return false;
}
// get the value and advance
v_out.emplace_back(tokenizer.get());
tokenizer.advance();
}
return true;
case arg_nargs_t::UNKNOWN:
// no arg next
if (!tokenizer.hasCurrent() || tokenizer.isFlag())
{
// python's default is to store const if around otherwise store default
if (!properties.a_const.empty())
v_out.emplace_back(properties.a_const);
else // this should no longer be required with the changes to how defaults are handled
v_out.emplace_back(properties.a_default);
return true;
}
v_out.emplace_back(tokenizer.get());
tokenizer.advance();
return true;
case arg_nargs_t::ALL:
while (tokenizer.hasCurrent() && !tokenizer.isFlag())
{
v_out.emplace_back(tokenizer.get());
tokenizer.advance();
}
return true;
case arg_nargs_t::ALL_REQUIRED:
if (tokenizer.hasCurrent() && tokenizer.isFlag())
{
BLT_WARN("At least one argument is required!");
return false;
}
while (tokenizer.hasCurrent() && !tokenizer.isFlag())
{
v_out.emplace_back(tokenizer.get());
tokenizer.advance();
}
return true;
}
return false;
}
void arg_parse::handlePositionalArgument(arg_tokenizer& tokenizer, size_t& last_pos)
{
auto index = last_pos++;
if (index >= user_args.name_associations.size())
loaded_args.unrecognized_args.push_back(tokenizer.get());
else
loaded_args.data[user_args.name_associations[index]->a_dest] = tokenizer.get();
tokenizer.advance();
}
void arg_parse::handleFlagArgument(arg_tokenizer& tokenizer)
{
auto flag = tokenizer.get();
tokenizer.advance();
// token is a flag, figure out how to handle it
if (flag.starts_with("--"))
processFlag(tokenizer, flag);
else
{
// handle special args like -vvv
if (!flag.starts_with('-'))
BLT_ERROR("Flag processed but does not start with '-'");
// make sure the flag only contains the same character
auto type = flag[1];
for (char c : flag.substr(1))
{
if (c != type)
{
BLT_ERROR("Processed flag '%s' expected %c found %c", flag.c_str(), type, c);
return;
}
}
// size without -
auto len = flag.size() - 1;
// get flag type
std::string str = "- ";
str[1] = flag[1];
for (size_t i = 0; i < len; i++)
processFlag(tokenizer, str);
}
}
void arg_parse::processFlag(arg_tokenizer& tokenizer, const std::string& flag)
{
auto flag_itr = user_args.flag_associations.find(flag);
if (flag_itr == user_args.flag_associations.end())
{
loaded_args.unrecognized_args.push_back(flag);
return;
}
const auto* const properties = user_args.flag_associations.at(flag);
if (properties->a_dest.empty())
{
loaded_args.unrecognized_args.push_back(flag);
return;
}
auto dest = properties->a_dest;
if (dest.starts_with("--"))
dest = dest.substr(2);
else if (dest.starts_with('-'))
dest = dest.substr(1);
switch (properties->a_action)
{
case arg_action_t::HELP:
printHelp();
break;
case arg_action_t::STORE:
{
arg_data_t& data = loaded_args.data[dest];
arg_data_vec_t v;
if (!consumeArguments(tokenizer, *properties, v))
{
printHelp();
return;
}
if (v.size() == 1)
data = v[0];
else
data = v;
break;
}
case arg_action_t::STORE_CONST:
loaded_args.data[dest] = properties->a_const;
break;
case arg_action_t::STORE_FALSE:
loaded_args.data[dest] = false;
break;
case arg_action_t::STORE_TRUE:
loaded_args.data[dest] = true;
break;
case arg_action_t::COUNT:
{
auto& data = loaded_args.data[dest];
if (!holds_alternative<int32_t>(data))
data = 0;
data = get<int32_t>(data) + 1;
break;
}
case arg_action_t::EXTEND:
{
break;
}
case arg_action_t::VERSION:
{
auto file = filename(loaded_args.program_name);
BLT_INFO("%s, %s", file.c_str(), properties->a_version.c_str());
break;
}
case arg_action_t::APPEND_CONST:
{
auto& data = loaded_args.data[dest];
if (!std::holds_alternative<arg_data_vec_t>(data))
{
data = arg_data_vec_t();
}
auto& l = get<arg_data_vec_t>(data);
l.emplace_back(properties->a_const);
break;
}
case arg_action_t::APPEND:
{
auto& data = loaded_args.data[dest];
if (!holds_alternative<arg_data_vec_t>(data))
data = arg_data_vec_t();
auto& l = get<arg_data_vec_t>(data);
consumeArguments(tokenizer, *properties, l);
break;
}
}
}
arg_parse::arg_results arg_parse::parse_args(int argc, const char** argv)
{
std::vector<std::string> args;
args.reserve(argc);
for (int i = 0; i < argc; i++)
args.emplace_back(argv[i]);
return parse_args(args);
}
arg_parse::arg_results arg_parse::parse_args(const std::vector<std::string>& args)
{
arg_tokenizer tokenizer(args);
loaded_args.program_name = tokenizer.get();
tokenizer.advance();
size_t last_positional = 0;
while (tokenizer.hasCurrent())
{
if (tokenizer.isFlag())
handleFlagArgument(tokenizer);
else
handlePositionalArgument(tokenizer, last_positional);
}
// if there was no problems processing then return the loaded args
if (loaded_args.unrecognized_args.empty())
return loaded_args;
// otherwise construct a string detailing the unrecognized args
std::string unrec;
for (const auto& r : loaded_args.unrecognized_args)
{
unrec += '\'';
unrec += r;
unrec += '\'';
unrec += ' ';
}
// remove the last space caused by the for loop
unrec = unrec.substr(0, unrec.size() - 1);
// TODO: use exceptions?
BLT_WARN("Unrecognized args: %s", unrec.c_str());
printHelp();
return loaded_args;
}
void arg_parse::printHelp()
{
BLT_TRACE("I am helpful!");
std::exit(0);
}
}

24
src/tests/main.cpp
View File

@ -4,7 +4,7 @@
//#include "logging.h"
#include "profiling_tests.h"
#include "nbt_tests.h"
#include "blt/parse/argparse.h"
#include "blt/parse/argparse_2.h"
//#include "queue_tests.h"
//#include "blt/math/vectors.h"
//#include "blt/math/matrix.h"
@ -68,11 +68,25 @@ int (*func_func)(int) = [](int i) -> int {
int (*func_func_in)(int) = &test_as_func;
int main(int argc, const char** argv) {
blt::parser::argparse parser;
parser.addArgument({{"--foo", "-f"}});
blt::arg_parse parser;
parser.addArgument(blt::arg_builder({"--poo", "-p"}).build());
parser.addArgument(blt::arg_builder({"--foo", "-f"}).setAction(blt::arg_action_t::STORE_TRUE).setDefault(false).build());
parser.addArgument(blt::arg_builder({"--goo", "-g"}).build());
parser.addArgument(blt::arg_builder({"--oop", "-o"}).build());
parser.addArgument(blt::arg_builder("Sexy_pos").build());
auto args = parser.parse_args(argc, argv);
const char* r[2]{"BLT_TESTS", "--foo"};
auto args2 = parser.parse_args(2, r);
std::vector<std::string> superArgs {
"BLT_TESTS",
"Sexy",
"--poo", "I have poop",
};
auto args2 = parser.parse_args(superArgs);
for (const auto& a : args2.data){
BLT_TRACE("['%s' = '%s']", a.first.c_str(), blt::to_string(a.second).c_str());
}
BLT_TRACE(args2.program_name);
//
// if (argc > 1 && std::string(argv[1]) == "--no_color") {
// for (int i = (int)blt::logging::log_level::NONE; i < (int)blt::logging::log_level::FATAL; i++) {