ModuleManager.h

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/* -*- mode: c++; indent-tabs-mode: nil -*- */
/*
    ModuleManager.h

    Qore Programming Language

    Copyright (C) 2003 - 2020 Qore Technologies, s.r.o.

    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
    to deal in the Software without restriction, including without limitation
    the rights to use, copy, modify, merge, publish, distribute, sublicense,
    and/or sell copies of the Software, and to permit persons to whom the
    Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    DEALINGS IN THE SOFTWARE.

    Note that the Qore library is released under a choice of three open-source
    licenses: MIT (as above), LGPL 2+, or GPL 2+; see README-LICENSE for more
    information.
*/

#ifndef _QORE_MODULEMANAGER_H

#define _QORE_MODULEMANAGER_H

#include <qore/QoreThreadLock.h>
#include <qore/QoreString.h>

#include <vector>

#define QORE_MODULE_API_MAJOR 0  
#define QORE_MODULE_API_MINOR 24 

#define QORE_MODULE_COMPAT_API_MAJOR 0  
#define QORE_MODULE_COMPAT_API_MINOR 24 

hashdecl qore_mod_api_compat_s {
   unsigned char major;
   unsigned char minor;
};

DLLEXPORT extern const qore_mod_api_compat_s* qore_mod_api_list;

DLLEXPORT extern const unsigned qore_mod_api_list_len;

class QoreNamespace;
class QoreStringNode;
class QoreListNode;
class ExceptionSink;

typedef QoreStringNode* (*qore_module_init_t)();

typedef void (*qore_module_ns_init_t)(QoreNamespace* root_ns, QoreNamespace* qore_ns);

typedef void (*qore_module_delete_t)();

typedef void (*qore_module_parse_cmd_t)(const QoreString& cmd, ExceptionSink* xsink);

enum mod_op_e { MOD_OP_NONE, MOD_OP_EQ, MOD_OP_GT,
                MOD_OP_GE, MOD_OP_LT, MOD_OP_LE };

typedef std::vector<std::string> strvec_t;


hashdecl QoreModuleInfo {
    QoreString name;
    QoreString version;
    QoreString desc;
    QoreString author;
    QoreString url;
    int api_major = -1;
    int api_minor = -1;
    qore_module_init_t init = nullptr;
    qore_module_ns_init_t ns_init = nullptr;
    qore_module_delete_t del = nullptr;
    qore_module_parse_cmd_t parse_cmd = nullptr;

    qore_license_t license;
    QoreString license_str;

    strvec_t dependencies;

    QoreHashNode* info = nullptr;
};

typedef void (*qore_binary_module_desc_t)(QoreModuleInfo& mod_info);


class ModuleManager {
public:
    ModuleManager(const ModuleManager&) = delete;
    ModuleManager& operator=(const ModuleManager&) = delete;


    DLLEXPORT static void addModuleDir(const char* dir);


    DLLEXPORT static void addAutoModuleDir(const char* dir);


    DLLEXPORT static void addModuleDirList(const char* strlist);


    DLLEXPORT static void addAutoModuleDirList(const char* strlist);

    DLLEXPORT static QoreListNode* getModuleList();

    DLLEXPORT static QoreHashNode* getModuleHash();


    DLLEXPORT static int runTimeLoadModule(const char* name, ExceptionSink* xsink);


    DLLEXPORT static int runTimeLoadModule(const char* name, QoreProgram* pgm, ExceptionSink* xsink);


    DLLEXPORT static int runTimeLoadModule(ExceptionSink* xsink, const char* name, QoreProgram* pgm = nullptr,
        qore_binary_module_desc_t mod_desc_func = nullptr);


    DLLEXPORT static QoreStringNode* parseLoadModule(const char* name, QoreProgram* pgm = nullptr);

    DLLEXPORT void registerUserModuleFromSource(const char* name, const char* src, QoreProgram* pgm, ExceptionSink* xsink);

    DLLEXPORT static void addStandardModulePaths();

    // not exported in the public API
    DLLLOCAL ModuleManager();
};

DLLEXPORT extern ModuleManager MM;

static inline bool is_module_api_supported(int major, int minor) {
    for (unsigned i = 0; i < qore_mod_api_list_len; ++i)
        if (qore_mod_api_list[i].major == major && qore_mod_api_list[i].minor == minor)
        return true;
    return false;
}

#endif // _QORE_MODULEMANAGER_H