#ifndef NOMINMAX
// Fix for: warning C4003: not enough arguments for function-like macro invocation 'max'
// [C:\projects\node-libcurl\build\node_libcurl.vcxproj]
#define NOMINMAX
#endif

/**
 * Copyright (c) Jonathan Cardoso Machado. All Rights Reserved.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */
#include "Curl.h"

#include "CurlHttpPost.h"
#include "Easy.h"

#include <iostream>

namespace NodeLibcurl {

ssize_t addonAllocatedMemory = 0;
bool isLibcurlBuiltWithThreadedResolver = true;

// This should be kept in sync with the options on scripts/utils/curlOptionsBlacklist.js
const std::vector<CurlConstant> curlOptionNotImplemented = {
    // Options that are complex to add support for.
    {"SSL_CTX_FUNCTION", CURLOPT_SSL_CTX_FUNCTION},
    {"OPENSOCKETFUNCTION", CURLOPT_OPENSOCKETFUNCTION},
    {"CLOSESOCKETFUNCTION", CURLOPT_CLOSESOCKETFUNCTION},
    {"SOCKOPTFUNCTION", CURLOPT_SOCKOPTFUNCTION},

#if NODE_LIBCURL_VER_GE(7, 59, 0)
    {"RESOLVER_START_DATA", CURLOPT_RESOLVER_START_DATA},
    {"RESOLVER_START_FUNCTION", CURLOPT_RESOLVER_START_FUNCTION},
#endif

    {"CONV_FROM_UTF8_FUNCTION", CURLOPT_CONV_FROM_UTF8_FUNCTION},
    {"CONV_TO_NETWORK_FUNCTION", CURLOPT_CONV_TO_NETWORK_FUNCTION},
    {"CONV_FROM_NETWORK_FUNCTION", CURLOPT_CONV_FROM_NETWORK_FUNCTION},

    // Options that are used internally.
    {"WRITEDATA", CURLOPT_WRITEDATA},
    {"HEADERDATA", CURLOPT_HEADERDATA},

// Options that are not necessary because javascript nature.
#if NODE_LIBCURL_VER_GE(7, 63, 0)
    // URL's can be easily parsed on JS
    {"CURLU", CURLOPT_CURLU},
#endif

    {"PRIVATE", CURLOPT_PRIVATE},
    {"PROGRESSDATA", CURLOPT_PROGRESSDATA},

#if NODE_LIBCURL_VER_GE(7, 32, 0)
    {"XFERINFODATA", CURLOPT_XFERINFODATA},
#endif

    {"DEBUGDATA", CURLOPT_DEBUGDATA},
    {"SEEKDATA", CURLOPT_SEEKDATA},
    {"IOCTLDATA", CURLOPT_IOCTLDATA},
    {"SOCKOPTDATA", CURLOPT_SOCKOPTDATA},
    {"OPENSOCKETDATA", CURLOPT_OPENSOCKETDATA},
    {"CLOSESOCKETDATA", CURLOPT_CLOSESOCKETDATA},
    {"SSL_CTX_DATA", CURLOPT_SSL_CTX_DATA},
    {"INTERLEAVEDATA", CURLOPT_INTERLEAVEDATA},
    {"CHUNK_DATA", CURLOPT_CHUNK_DATA},
    {"FNMATCH_DATA", CURLOPT_FNMATCH_DATA},
    {"ERRORBUFFER", CURLOPT_ERRORBUFFER},
    {"COPYPOSTFIELDS", CURLOPT_COPYPOSTFIELDS},
    {"SSH_KEYDATA", CURLOPT_SSH_KEYDATA},

#if NODE_LIBCURL_VER_GE(7, 64, 0)
    {"TRAILERDATA", CURLOPT_TRAILERDATA},
#endif

    // Maybe?
    {"INTERLEAVEFUNCTION", CURLOPT_INTERLEAVEFUNCTION},
    {"SSH_KEYFUNCTION", CURLOPT_SSH_KEYFUNCTION},
    {"STDERR", CURLOPT_STDERR},

#if NODE_LIBCURL_VER_GE(7, 46, 0)
    {"STREAM_DEPENDS", CURLOPT_STREAM_DEPENDS},
    {"STREAM_DEPENDS_E", CURLOPT_STREAM_DEPENDS_E},
    {"STREAM_WEIGHT", CURLOPT_STREAM_WEIGHT},
#endif
};

const std::vector<CurlConstant> curlOptionInteger = {
    {"ACCEPTTIMEOUT_MS", CURLOPT_ACCEPTTIMEOUT_MS},
    {"ADDRESS_SCOPE", CURLOPT_ADDRESS_SCOPE},
    {"APPEND", CURLOPT_APPEND},
    {"AUTOREFERER", CURLOPT_AUTOREFERER},
    {"BUFFERSIZE", CURLOPT_BUFFERSIZE},
    {"CERTINFO", CURLOPT_CERTINFO},
    {"CONNECTTIMEOUT", CURLOPT_CONNECTTIMEOUT},
    {"CONNECTTIMEOUT_MS", CURLOPT_CONNECTTIMEOUT_MS},
    {"CONNECT_ONLY", CURLOPT_CONNECT_ONLY},
    {"COOKIESESSION", CURLOPT_COOKIESESSION},
    {"CRLF", CURLOPT_CRLF},
    {"DIRLISTONLY", CURLOPT_DIRLISTONLY},

#if NODE_LIBCURL_VER_GE(7, 60, 0)
    {"DISALLOW_USERNAME_IN_URL", CURLOPT_DISALLOW_USERNAME_IN_URL},
#endif

    {"DNS_CACHE_TIMEOUT", CURLOPT_DNS_CACHE_TIMEOUT},

#if NODE_LIBCURL_VER_GE(7, 60, 0)
    {"DNS_SHUFFLE_ADDRESSES", CURLOPT_DNS_SHUFFLE_ADDRESSES},
#endif
    // Disabled since libcurl 7.62
    {"DNS_USE_GLOBAL_CACHE", CURLOPT_DNS_USE_GLOBAL_CACHE},

#if NODE_LIBCURL_VER_GE(7, 76, 0)
    {"DOH_SSL_VERIFYHOST", CURLOPT_DOH_SSL_VERIFYHOST},
    {"DOH_SSL_VERIFYPEER", CURLOPT_DOH_SSL_VERIFYPEER},
    {"DOH_SSL_VERIFYSTATUS", CURLOPT_DOH_SSL_VERIFYSTATUS},
#endif

#if NODE_LIBCURL_VER_GE(7, 36, 0)
    {"EXPECT_100_TIMEOUT_MS", CURLOPT_EXPECT_100_TIMEOUT_MS},
#endif

    {"FAILONERROR", CURLOPT_FAILONERROR},
    {"FILETIME", CURLOPT_FILETIME},
    {"FOLLOWLOCATION", CURLOPT_FOLLOWLOCATION},
    {"FORBID_REUSE", CURLOPT_FORBID_REUSE},
    {"FRESH_CONNECT", CURLOPT_FRESH_CONNECT},
    {"FTP_CREATE_MISSING_DIRS", CURLOPT_FTP_CREATE_MISSING_DIRS},
    {"FTP_FILEMETHOD", CURLOPT_FTP_FILEMETHOD},
    {"FTP_RESPONSE_TIMEOUT", CURLOPT_FTP_RESPONSE_TIMEOUT},
    {"FTP_SKIP_PASV_IP", CURLOPT_FTP_SKIP_PASV_IP},
    {"FTP_USE_EPRT", CURLOPT_FTP_USE_EPRT},
    {"FTP_USE_EPSV", CURLOPT_FTP_USE_EPSV},
    {"FTP_USE_PRET", CURLOPT_FTP_USE_PRET},
    {"GSSAPI_DELEGATION", CURLOPT_GSSAPI_DELEGATION},

#if NODE_LIBCURL_VER_GE(7, 59, 0)
    {"HAPPY_EYEBALLS_TIMEOUT_MS", CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS},
#endif

#if NODE_LIBCURL_VER_GE(7, 60, 0)
    {"HAPROXYPROTOCOL", CURLOPT_HAPROXYPROTOCOL},
#endif

    {"HEADER", CURLOPT_HEADER},

#if NODE_LIBCURL_VER_GE(7, 37, 0)
    {"HEADEROPT", CURLOPT_HEADEROPT},
#endif

#if NODE_LIBCURL_VER_GE(7, 74, 0)
    {"HSTS_CTRL", CURLOPT_HSTS_CTRL},
#endif

#if NODE_LIBCURL_VER_GE(7, 64, 0)
    {"HTTP09_ALLOWED", CURLOPT_HTTP09_ALLOWED},
#endif

    {"HTTPAUTH", CURLOPT_HTTPAUTH},
    {"HTTPGET", CURLOPT_HTTPGET},
    {"HTTPPROXYTUNNEL", CURLOPT_HTTPPROXYTUNNEL},
    {"HTTP_CONTENT_DECODING", CURLOPT_HTTP_CONTENT_DECODING},
    {"HTTP_TRANSFER_DECODING", CURLOPT_HTTP_TRANSFER_DECODING},
    {"HTTP_VERSION", CURLOPT_HTTP_VERSION},
    {"IGNORE_CONTENT_LENGTH", CURLOPT_IGNORE_CONTENT_LENGTH},
    {"INFILESIZE", CURLOPT_INFILESIZE},
    {"IPRESOLVE", CURLOPT_IPRESOLVE},

#if NODE_LIBCURL_VER_GE(7, 51, 0)
    {"KEEP_SENDING_ON_ERROR", CURLOPT_KEEP_SENDING_ON_ERROR},
#endif

    {"LOCALPORT", CURLOPT_LOCALPORT},
    {"LOCALPORTRANGE", CURLOPT_LOCALPORTRANGE},
    {"LOW_SPEED_LIMIT", CURLOPT_LOW_SPEED_LIMIT},
    {"LOW_SPEED_TIME", CURLOPT_LOW_SPEED_TIME},

#if NODE_LIBCURL_VER_GE(7, 69, 0)
    {"MAIL_RCPT_ALLLOWFAILS", CURLOPT_MAIL_RCPT_ALLLOWFAILS},
#endif

#if NODE_LIBCURL_VER_GE(7, 65, 0)
    {"MAXAGE_CONN", CURLOPT_MAXAGE_CONN},
#endif

    {"MAXCONNECTS", CURLOPT_MAXCONNECTS},
    {"MAXFILESIZE", CURLOPT_MAXFILESIZE},

#if NODE_LIBCURL_VER_GE(7, 80, 0)
    {"MAXLIFETIME_CONN", CURLOPT_MAXLIFETIME_CONN},
#endif

    {"MAXREDIRS", CURLOPT_MAXREDIRS},
    {"NETRC", CURLOPT_NETRC},
    {"NEW_DIRECTORY_PERMS", CURLOPT_NEW_DIRECTORY_PERMS},
    {"NEW_FILE_PERMS", CURLOPT_NEW_FILE_PERMS},
    {"NOBODY", CURLOPT_NOBODY},
    {"NOPROGRESS", CURLOPT_NOPROGRESS},
    {"NOSIGNAL", CURLOPT_NOSIGNAL},

#if NODE_LIBCURL_VER_GE(7, 42, 0)
    {"PATH_AS_IS", CURLOPT_PATH_AS_IS},
#endif

#if NODE_LIBCURL_VER_GE(7, 43, 0)
    {"PIPEWAIT", CURLOPT_PIPEWAIT},
#endif

    {"PORT", CURLOPT_PORT},
    {"POST", CURLOPT_POST},
    {"POSTFIELDSIZE", CURLOPT_POSTFIELDSIZE},
    {"POSTREDIR", CURLOPT_POSTREDIR},
    {"PROTOCOLS", CURLOPT_PROTOCOLS},
    {"PROXY_TRANSFER_MODE", CURLOPT_PROXY_TRANSFER_MODE},
    {"PROXYAUTH", CURLOPT_PROXYAUTH},
    {"PROXYPORT", CURLOPT_PROXYPORT},

#if NODE_LIBCURL_VER_GE(7, 52, 0)
    {"PROXY_SSL_OPTIONS", CURLOPT_PROXY_SSL_OPTIONS},
    {"PROXY_SSL_VERIFYHOST", CURLOPT_PROXY_SSL_VERIFYHOST},
    {"PROXY_SSL_VERIFYPEER", CURLOPT_PROXY_SSL_VERIFYPEER},
    {"PROXY_SSLVERSION", CURLOPT_PROXY_SSLVERSION},
#endif

    {"PROXYTYPE", CURLOPT_PROXYTYPE},
    {"PUT", CURLOPT_PUT},
    {"READDATA", CURLOPT_READDATA},
    {"REDIR_PROTOCOLS", CURLOPT_REDIR_PROTOCOLS},
    {"RESUME_FROM", CURLOPT_RESUME_FROM},
    {"RTSP_CLIENT_CSEQ", CURLOPT_RTSP_CLIENT_CSEQ},
    {"RTSP_REQUEST", CURLOPT_RTSP_REQUEST},
    {"RTSP_SERVER_CSEQ", CURLOPT_RTSP_SERVER_CSEQ},
    {"SASL_IR", CURLOPT_SASL_IR},

    {"SERVER_RESPONSE_TIMEOUT", CURLOPT_SERVER_RESPONSE_TIMEOUT},

#if NODE_LIBCURL_VER_GE(7, 55, 0)
    {"SOCKS5_AUTH", CURLOPT_SOCKS5_AUTH},
#endif

    {"SOCKS5_GSSAPI_NEC", CURLOPT_SOCKS5_GSSAPI_NEC},
    {"SSH_AUTH_TYPES", CURLOPT_SSH_AUTH_TYPES},

#if NODE_LIBCURL_VER_GE(7, 56, 0)
    {"SSH_COMPRESSION", CURLOPT_SSH_COMPRESSION},
#endif

    {"SSL_OPTIONS", CURLOPT_SSL_OPTIONS},
    {"SSLENGINE_DEFAULT", CURLOPT_SSLENGINE_DEFAULT},

#if NODE_LIBCURL_VER_GE(7, 36, 0)
    {"SSL_ENABLE_ALPN", CURLOPT_SSL_ENABLE_ALPN},
    {"SSL_ENABLE_NPN", CURLOPT_SSL_ENABLE_NPN},
#endif

    {"SSL_SESSIONID_CACHE", CURLOPT_SSL_SESSIONID_CACHE},
    {"SSL_VERIFYHOST", CURLOPT_SSL_VERIFYHOST},
    {"SSL_VERIFYPEER", CURLOPT_SSL_VERIFYPEER},

#if NODE_LIBCURL_VER_GE(7, 41, 0)
    {"SSL_VERIFYSTATUS", CURLOPT_SSL_VERIFYSTATUS},
#endif

    {"SSLVERSION", CURLOPT_SSLVERSION},

#if NODE_LIBCURL_VER_GE(7, 54, 0)
    {"SUPPRESS_CONNECT_HEADERS", CURLOPT_SUPPRESS_CONNECT_HEADERS},
#endif

#if NODE_LIBCURL_VER_GE(7, 49, 0)
    {"TCP_FASTOPEN", CURLOPT_TCP_FASTOPEN},
#endif

    {"TCP_KEEPALIVE", CURLOPT_TCP_KEEPALIVE},
    {"TCP_KEEPIDLE", CURLOPT_TCP_KEEPIDLE},
    {"TCP_KEEPINTVL", CURLOPT_TCP_KEEPINTVL},
    {"TCP_NODELAY", CURLOPT_TCP_NODELAY},
    {"TFTP_BLKSIZE", CURLOPT_TFTP_BLKSIZE},
    {"TIMECONDITION", CURLOPT_TIMECONDITION},
    {"TIMEOUT", CURLOPT_TIMEOUT},
    {"TIMEOUT_MS", CURLOPT_TIMEOUT_MS},
    {"TIMEVALUE", CURLOPT_TIMEVALUE},
    {"TRANSFERTEXT", CURLOPT_TRANSFERTEXT},
    {"TRANSFER_ENCODING", CURLOPT_TRANSFER_ENCODING},
    {"UNRESTRICTED_AUTH", CURLOPT_UNRESTRICTED_AUTH},
    {"UPLOAD", CURLOPT_UPLOAD},

#if NODE_LIBCURL_VER_GE(7, 62, 0)
    {"UPLOAD_BUFFERSIZE", CURLOPT_UPLOAD_BUFFERSIZE},
    {"UPKEEP_INTERVAL_MS", CURLOPT_UPKEEP_INTERVAL_MS},
#endif

    {"USE_SSL", CURLOPT_USE_SSL},
    {"VERBOSE", CURLOPT_VERBOSE},
    {"WILDCARDMATCH", CURLOPT_WILDCARDMATCH},

    // _LARGE options
    {"INFILESIZE_LARGE", CURLOPT_INFILESIZE_LARGE},
    {"MAXFILESIZE_LARGE", CURLOPT_MAXFILESIZE_LARGE},
    {"MAX_RECV_SPEED_LARGE", CURLOPT_MAX_RECV_SPEED_LARGE},
    {"MAX_SEND_SPEED_LARGE", CURLOPT_MAX_SEND_SPEED_LARGE},
    {"POSTFIELDSIZE_LARGE", CURLOPT_POSTFIELDSIZE_LARGE},
    {"RESUME_FROM_LARGE", CURLOPT_RESUME_FROM_LARGE},
#if NODE_LIBCURL_VER_GE(7, 59, 0)
    {"TIMEVALUE_LARGE", CURLOPT_TIMEVALUE_LARGE},
#endif

#if BUILD_IMPERSONATE
    {"SSL_ENABLE_ALPS", CURLOPT_SSL_ENABLE_ALPS},
    {"SSL_ENABLE_TICKET", CURLOPT_SSL_ENABLE_TICKET},
    {"SSL_PERMUTE_EXTENSIONS", CURLOPT_SSL_PERMUTE_EXTENSIONS},
    {"HTTP2_WINDOW_UPDATE", CURLOPT_HTTP2_WINDOW_UPDATE},
    {"TLS_GREASE", CURLOPT_TLS_GREASE},
    {"STREAM_EXCLUSIVE", CURLOPT_STREAM_EXCLUSIVE},
    {"TLS_KEY_USAGE_NO_CHECK", CURLOPT_TLS_KEY_USAGE_NO_CHECK},
    {"TLS_SIGNED_CERT_TIMESTAMPS", CURLOPT_TLS_SIGNED_CERT_TIMESTAMPS},
    {"TLS_STATUS_REQUEST", CURLOPT_TLS_STATUS_REQUEST},
    {"TLS_RECORD_SIZE_LIMIT", CURLOPT_TLS_RECORD_SIZE_LIMIT},
    {"TLS_KEY_SHARES_LIMIT", CURLOPT_TLS_KEY_SHARES_LIMIT},
    {"TLS_USE_NEW_ALPS_CODEPOINT", CURLOPT_TLS_USE_NEW_ALPS_CODEPOINT},
    {"HTTP2_NO_PRIORITY", CURLOPT_HTTP2_NO_PRIORITY},
    {"PROXY_CREDENTIAL_NO_REUSE", CURLOPT_PROXY_CREDENTIAL_NO_REUSE},
#endif
};

const std::vector<CurlConstant> curlOptionString = {
    {"ACCEPT_ENCODING", CURLOPT_ACCEPT_ENCODING},

#if NODE_LIBCURL_VER_GE(7, 75, 0)
    {"AWS_SIGV4", CURLOPT_AWS_SIGV4},
#endif

    {"CAINFO", CURLOPT_CAINFO},
    {"CAPATH", CURLOPT_CAPATH},
    {"COOKIE", CURLOPT_COOKIE},
    {"COOKIEFILE", CURLOPT_COOKIEFILE},
    {"COOKIEJAR", CURLOPT_COOKIEJAR},
    {"COOKIELIST", CURLOPT_COOKIELIST},
    {"CRLFILE", CURLOPT_CRLFILE},
    {"CUSTOMREQUEST", CURLOPT_CUSTOMREQUEST},

#if NODE_LIBCURL_VER_GE(7, 45, 0)
    {"DEFAULT_PROTOCOL", CURLOPT_DEFAULT_PROTOCOL},
#endif

#if NODE_LIBCURL_VER_GE(7, 33, 0)
    {"DNS_INTERFACE", CURLOPT_DNS_INTERFACE},
    {"DNS_LOCAL_IP4", CURLOPT_DNS_LOCAL_IP4},
    {"DNS_LOCAL_IP6", CURLOPT_DNS_LOCAL_IP6},
#endif

    {"DNS_SERVERS", CURLOPT_DNS_SERVERS},

#if NODE_LIBCURL_VER_GE(7, 62, 0)
    {"DOH_URL", CURLOPT_DOH_URL},
#endif

#if NODE_LIBCURL_VER_GE(8, 8, 0)
    {"ECH", CURLOPT_ECH},
#endif

    {"EGDSOCKET", CURLOPT_EGDSOCKET},
    {"ENCODING", CURLOPT_ENCODING},  // should use ACCEPT_ENCODING
    {"FTPPORT", CURLOPT_FTPPORT},
    {"FTP_ACCOUNT", CURLOPT_FTP_ACCOUNT},
    {"FTP_ALTERNATIVE_TO_USER", CURLOPT_FTP_ALTERNATIVE_TO_USER},
    {"HTTP200ALIASES", CURLOPT_HTTP200ALIASES},

#if NODE_LIBCURL_VER_GE(7, 74, 0)
    {"HSTS", CURLOPT_HSTS},
#endif

    {"INTERFACE", CURLOPT_INTERFACE},
    {"ISSUERCERT", CURLOPT_ISSUERCERT},
    {"KEYPASSWD", CURLOPT_KEYPASSWD},
    {"KRBLEVEL", CURLOPT_KRBLEVEL},

#if NODE_LIBCURL_VER_GE(7, 34, 0)
    {"LOGIN_OPTIONS", CURLOPT_LOGIN_OPTIONS},
#endif

    {"MAIL_AUTH", CURLOPT_MAIL_AUTH},
    {"MAIL_FROM", CURLOPT_MAIL_FROM},
    {"NETRC_FILE", CURLOPT_NETRC_FILE},
    {"NOPROXY", CURLOPT_NOPROXY},
    {"PASSWORD", CURLOPT_PASSWORD},

#if NODE_LIBCURL_VER_GE(7, 39, 0)
    {"PINNEDPUBLICKEY", CURLOPT_PINNEDPUBLICKEY},
#endif

    {"POSTFIELDS", CURLOPT_POSTFIELDS},
    {"POSTQUOTE", CURLOPT_POSTQUOTE},
    {"PREQUOTE", CURLOPT_PREQUOTE},

#if NODE_LIBCURL_VER_GE(7, 52, 0)
    {"PRE_PROXY", CURLOPT_PRE_PROXY},
#endif

#if NODE_LIBCURL_VER_GE(7, 85, 0)
    {"PROTOCOLS_STR", CURLOPT_PROTOCOLS_STR},
#endif

    {"PROXY", CURLOPT_PROXY},

#if NODE_LIBCURL_VER_GE(7, 52, 0)
    {"PROXY_CAINFO", CURLOPT_PROXY_CAINFO},
    {"PROXY_CAPATH", CURLOPT_PROXY_CAPATH},
    {"PROXY_CRLFILE", CURLOPT_PROXY_CRLFILE},
#if NODE_LIBCURL_VER_GE(7, 71, 0)
    {"PROXY_ISSUERCERT", CURLOPT_PROXY_ISSUERCERT},
#endif
    {"PROXY_KEYPASSWD", CURLOPT_PROXY_KEYPASSWD},
    {"PROXY_PINNEDPUBLICKEY", CURLOPT_PROXY_PINNEDPUBLICKEY},
    {"PROXY_SSLCERT", CURLOPT_PROXY_SSLCERT},
    {"PROXY_SSLCERTTYPE", CURLOPT_PROXY_SSLCERTTYPE},
    {"PROXY_SSLKEY", CURLOPT_PROXY_SSLKEY},
    {"PROXY_SSLKEYTYPE", CURLOPT_PROXY_SSLKEYTYPE},
    {"PROXY_SSL_CIPHER_LIST", CURLOPT_PROXY_SSL_CIPHER_LIST},
    {"PROXY_TLSAUTH_PASSWORD", CURLOPT_PROXY_TLSAUTH_PASSWORD},
    {"PROXY_TLSAUTH_TYPE", CURLOPT_PROXY_TLSAUTH_TYPE},
    {"PROXY_TLSAUTH_USERNAME", CURLOPT_PROXY_TLSAUTH_USERNAME},
#endif

#if NODE_LIBCURL_VER_GE(7, 43, 0)
    {"PROXY_SERVICE_NAME", CURLOPT_PROXY_SERVICE_NAME},
#endif

#if NODE_LIBCURL_VER_GE(7, 61, 0)
    {"PROXY_TLS13_CIPHERS", CURLOPT_PROXY_TLS13_CIPHERS},
#endif

    {"PROXYPASSWORD", CURLOPT_PROXYPASSWORD},
    {"PROXYUSERNAME", CURLOPT_PROXYUSERNAME},
    {"PROXYUSERPWD", CURLOPT_PROXYUSERPWD},

    {"QUOTE", CURLOPT_QUOTE},
    {"RANDOM_FILE", CURLOPT_RANDOM_FILE},
    {"RANGE", CURLOPT_RANGE},

#if NODE_LIBCURL_VER_GE(7, 85, 0)
    {"REDIR_PROTOCOLS_STR", CURLOPT_REDIR_PROTOCOLS_STR},
#endif

    {"REFERER", CURLOPT_REFERER},

#if NODE_LIBCURL_VER_GE(7, 55, 0)
    {"REQUEST_TARGET", CURLOPT_REQUEST_TARGET},
#endif

    {"RTSP_SESSION_ID", CURLOPT_RTSP_SESSION_ID},
    {"RTSP_STREAM_URI", CURLOPT_RTSP_STREAM_URI},
    {"RTSP_TRANSPORT", CURLOPT_RTSP_TRANSPORT},

#if NODE_LIBCURL_VER_GE(7, 66, 0)
    {"SASL_AUTHZID", CURLOPT_SASL_AUTHZID},
#endif

#if NODE_LIBCURL_VER_GE(7, 43, 0)
    {"SERVICE_NAME", CURLOPT_SERVICE_NAME},
#endif

    {"SOCKS5_GSSAPI_SERVICE", CURLOPT_SOCKS5_GSSAPI_SERVICE},
    {"SSH_HOST_PUBLIC_KEY_MD5", CURLOPT_SSH_HOST_PUBLIC_KEY_MD5},
    {"SSH_KNOWNHOSTS", CURLOPT_SSH_KNOWNHOSTS},
    {"SSH_PRIVATE_KEYFILE", CURLOPT_SSH_PRIVATE_KEYFILE},
    {"SSH_PUBLIC_KEYFILE", CURLOPT_SSH_PUBLIC_KEYFILE},
    {"SSLCERT", CURLOPT_SSLCERT},
    {"SSLCERTTYPE", CURLOPT_SSLCERTTYPE},
    {"SSLENGINE", CURLOPT_SSLENGINE},
    {"SSLKEY", CURLOPT_SSLKEY},
    {"SSLKEYTYPE", CURLOPT_SSLKEYTYPE},
    {"SSL_CIPHER_LIST", CURLOPT_SSL_CIPHER_LIST},

#if NODE_LIBCURL_VER_GE(7, 73, 0)
    {"SSL_EC_CURVES", CURLOPT_SSL_EC_CURVES},
#endif

    {"TELNETOPTIONS", CURLOPT_TELNETOPTIONS},

#if NODE_LIBCURL_VER_GE(7, 61, 0)
    {"TLS13_CIPHERS", CURLOPT_TLS13_CIPHERS},
#endif

    {"TLSAUTH_PASSWORD", CURLOPT_TLSAUTH_PASSWORD},
    {"TLSAUTH_TYPE", CURLOPT_TLSAUTH_TYPE},
    {"TLSAUTH_USERNAME", CURLOPT_TLSAUTH_USERNAME},

#if NODE_LIBCURL_VER_GE(7, 40, 0)
    {"UNIX_SOCKET_PATH", CURLOPT_UNIX_SOCKET_PATH},
#endif

    {"URL", CURLOPT_URL},
    {"USERAGENT", CURLOPT_USERAGENT},
    {"USERNAME", CURLOPT_USERNAME},
    {"USERPWD", CURLOPT_USERPWD},

#if NODE_LIBCURL_VER_GE(7, 33, 0)
    {"XOAUTH2_BEARER", CURLOPT_XOAUTH2_BEARER},
#endif

#if BUILD_IMPERSONATE
    {"IMPERSONATE", CURLOPT_IMPERSONATE},
    {"SSL_SIG_HASH_ALGS", CURLOPT_SSL_SIG_HASH_ALGS},
    {"SSL_CERT_COMPRESSION", CURLOPT_SSL_CERT_COMPRESSION},
    {"HTTP2_PSEUDO_HEADERS_ORDER", CURLOPT_HTTP2_PSEUDO_HEADERS_ORDER},
    {"HTTP2_SETTINGS", CURLOPT_HTTP2_SETTINGS},
    {"HTTP2_STREAMS", CURLOPT_HTTP2_STREAMS},
    {"TLS_EXTENSION_ORDER", CURLOPT_TLS_EXTENSION_ORDER},
    {"TLS_DELEGATED_CREDENTIALS", CURLOPT_TLS_DELEGATED_CREDENTIALS},
#endif
};

const std::vector<CurlConstant> curlOptionFunction = {
    {"CHUNK_BGN_FUNCTION", CURLOPT_CHUNK_BGN_FUNCTION},
    {"CHUNK_END_FUNCTION", CURLOPT_CHUNK_END_FUNCTION},
    {"FNMATCH_FUNCTION", CURLOPT_FNMATCH_FUNCTION},
    {"DEBUGFUNCTION", CURLOPT_DEBUGFUNCTION},
    {"HEADERFUNCTION", CURLOPT_HEADERFUNCTION},

#if NODE_LIBCURL_VER_GE(7, 74, 0)
    {"HSTSREADFUNCTION", CURLOPT_HSTSREADFUNCTION},
    {"HSTSWRITEFUNCTION", CURLOPT_HSTSWRITEFUNCTION},
#endif

#if NODE_LIBCURL_VER_GE(7, 80, 0)
    {"PREREQFUNCTION", CURLOPT_PREREQFUNCTION},
#endif

    {"PROGRESSFUNCTION", CURLOPT_PROGRESSFUNCTION},
    {"READFUNCTION", CURLOPT_READFUNCTION},
    {"SEEKFUNCTION", CURLOPT_SEEKFUNCTION},

#if NODE_LIBCURL_VER_GE(7, 64, 0)
    {"TRAILERFUNCTION", CURLOPT_TRAILERFUNCTION},
#endif

#if NODE_LIBCURL_VER_GE(7, 32, 0)
    {"XFERINFOFUNCTION", CURLOPT_XFERINFOFUNCTION},
#endif

    {"WRITEFUNCTION", CURLOPT_WRITEFUNCTION},
};

const std::vector<CurlConstant> curlOptionLinkedList = {
#if NODE_LIBCURL_VER_GE(7, 49, 0)
    {"CONNECT_TO", CURLOPT_CONNECT_TO},
#endif

    {"HTTP200ALIASES", CURLOPT_HTTP200ALIASES},
    {"HTTPHEADER", CURLOPT_HTTPHEADER},
    {"HTTPPOST", CURLOPT_HTTPPOST},
    {"MAIL_RCPT", CURLOPT_MAIL_RCPT},

#if NODE_LIBCURL_VER_GE(7, 37, 0)
    {"PROXYHEADER", CURLOPT_PROXYHEADER},
#endif

    {"POSTQUOTE", CURLOPT_POSTQUOTE},
    {"PREQUOTE", CURLOPT_PREQUOTE},
    {"QUOTE", CURLOPT_QUOTE},
    {"RESOLVE", CURLOPT_RESOLVE},
    {"RTSPHEADER", CURLOPT_RTSPHEADER},
    {"TELNETOPTIONS", CURLOPT_TELNETOPTIONS},

#if BUILD_IMPERSONATE
    {"HTTPBASEHEADER", CURLOPT_HTTPBASEHEADER},
#endif
};

const std::vector<CurlConstant> curlOptionHttpPost = {
    {"NAME", CurlHttpPost::NAME},         {"FILE", CurlHttpPost::FILE},
    {"CONTENTS", CurlHttpPost::CONTENTS}, {"TYPE", CurlHttpPost::TYPE},
    {"FILENAME", CurlHttpPost::FILENAME},
};

const std::vector<CurlConstant> curlOptionSpecific = {
    {"SHARE", CURLOPT_SHARE},
};

// This should be kept in sync with the options on scripts/utils/multiOptionsBlacklist.js
const std::vector<CurlConstant> curlMultiOptionNotImplemented = {
    // Used internally.
    {"SOCKETFUNCTION", CURLMOPT_SOCKETFUNCTION},
    {"SOCKETDATA", CURLMOPT_SOCKETDATA},
    {"TIMERFUNCTION", CURLMOPT_TIMERFUNCTION},
    {"TIMERDATA", CURLMOPT_TIMERDATA},
// Unnecessary
#if NODE_LIBCURL_VER_GE(7, 44, 0)
    {"PUSHDATA", CURLMOPT_PUSHDATA},
#endif
};

const std::vector<CurlConstant> curlMultiOptionInteger = {
    {"CHUNK_LENGTH_PENALTY_SIZE", CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE},
    {"CONTENT_LENGTH_PENALTY_SIZE", CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE},
#if NODE_LIBCURL_VER_GE(7, 67, 0)
    {"MAX_CONCURRENT_STREAMS", CURLMOPT_MAX_CONCURRENT_STREAMS},
#endif
    {"MAX_HOST_CONNECTIONS", CURLMOPT_MAX_HOST_CONNECTIONS},
    {"MAX_TOTAL_CONNECTIONS", CURLMOPT_MAX_TOTAL_CONNECTIONS},
    {"MAXCONNECTS", CURLMOPT_MAXCONNECTS},
    // Pipelining was removed on libcurl 7.62, since then those options do nothing
    // Also see: https://github.com/curl/curl/pull/3651
    {"MAX_PIPELINE_LENGTH", CURLMOPT_MAX_PIPELINE_LENGTH},
    {"PIPELINING", CURLMOPT_PIPELINING},
};

const std::vector<CurlConstant> curlMultiOptionStringArray = {
    // Pipelining was removed on libcurl 7.62, since then those options do nothing
    // Also see: https://github.com/curl/curl/pull/3651
    {"PIPELINING_SERVER_BL", CURLMOPT_PIPELINING_SERVER_BL},
    {"PIPELINING_SITE_BL", CURLMOPT_PIPELINING_SITE_BL},
};

const std::vector<CurlConstant> curlMultiOptionFunction = {
#if NODE_LIBCURL_VER_GE(7, 44, 0)
    {"PUSHFUNCTION", CURLMOPT_PUSHFUNCTION},
#endif
};

const std::vector<CurlConstant> curlInfoNotImplemented = {
// Complex.
#if NODE_LIBCURL_VER_GE(7, 34, 0)
    {"TLS_SESSION", CURLINFO_TLS_SESSION},
#endif
#if NODE_LIBCURL_VER_GE(7, 48, 0)
    {"TLS_SSL_PTR", CURLINFO_TLS_SSL_PTR},
#endif
    // Unnecessary.
    {"PRIVATE", CURLINFO_PRIVATE},
    // Maybe
};

const std::vector<CurlConstant> curlInfoString = {
#if NODE_LIBCURL_VER_GE(7, 84, 0)
    {"CAINFO", CURLINFO_CAINFO},
    {"CAPATH", CURLINFO_CAPATH},
#endif

    {"CONTENT_TYPE", CURLINFO_CONTENT_TYPE},
    {"EFFECTIVE_URL", CURLINFO_EFFECTIVE_URL},

#if NODE_LIBCURL_VER_GE(7, 72, 0)
    {"EFFECTIVE_METHOD", CURLINFO_EFFECTIVE_METHOD},
#endif

    {"FTP_ENTRY_PATH", CURLINFO_FTP_ENTRY_PATH},
    {"LOCAL_IP", CURLINFO_LOCAL_IP},
    {"PRIMARY_IP", CURLINFO_PRIMARY_IP},
    {"REDIRECT_URL", CURLINFO_REDIRECT_URL},

#if NODE_LIBCURL_VER_GE(7, 76, 0)
    {"REFERER", CURLINFO_REFERER},
#endif

    {"RTSP_SESSION_ID", CURLINFO_RTSP_SESSION_ID},

#if NODE_LIBCURL_VER_GE(7, 52, 0)
    {"SCHEME", CURLINFO_SCHEME},
#endif
};

const std::vector<CurlConstant> curlInfoOffT = {
#if NODE_LIBCURL_VER_GE(7, 55, 0)
    {"CONTENT_LENGTH_DOWNLOAD_T", CURLINFO_CONTENT_LENGTH_DOWNLOAD_T},
    {"CONTENT_LENGTH_UPLOAD_T", CURLINFO_CONTENT_LENGTH_UPLOAD_T},
    {"SIZE_DOWNLOAD_T", CURLINFO_SIZE_DOWNLOAD_T},
    {"SIZE_UPLOAD_T", CURLINFO_SIZE_UPLOAD_T},
    {"SPEED_DOWNLOAD_T", CURLINFO_SPEED_DOWNLOAD_T},
    {"SPEED_UPLOAD_T", CURLINFO_SPEED_UPLOAD_T},
#endif
#if NODE_LIBCURL_VER_GE(7, 59, 0)
    {"FILETIME_T", CURLINFO_FILETIME_T},
#endif
#if NODE_LIBCURL_VER_GE(7, 61, 0)
    {"APPCONNECT_TIME_T", CURLINFO_APPCONNECT_TIME_T},
    {"CONNECT_TIME_T", CURLINFO_CONNECT_TIME_T},
    {"NAMELOOKUP_TIME_T", CURLINFO_NAMELOOKUP_TIME_T},
    {"PRETRANSFER_TIME_T", CURLINFO_PRETRANSFER_TIME_T},
    {"REDIRECT_TIME_T", CURLINFO_REDIRECT_TIME_T},
    {"STARTTRANSFER_TIME_T", CURLINFO_STARTTRANSFER_TIME_T},
    {"TOTAL_TIME_T", CURLINFO_TOTAL_TIME_T},
#endif
#if NODE_LIBCURL_VER_GE(7, 66, 0)
    {"RETRY_AFTER", CURLINFO_RETRY_AFTER},
#endif
};

const std::vector<CurlConstant> curlInfoDouble = {
    {"APPCONNECT_TIME", CURLINFO_APPCONNECT_TIME},
    {"CONNECT_TIME", CURLINFO_CONNECT_TIME},
    {"CONTENT_LENGTH_DOWNLOAD", CURLINFO_CONTENT_LENGTH_DOWNLOAD},
    {"CONTENT_LENGTH_UPLOAD", CURLINFO_CONTENT_LENGTH_UPLOAD},
    {"NAMELOOKUP_TIME", CURLINFO_NAMELOOKUP_TIME},
    {"PRETRANSFER_TIME", CURLINFO_PRETRANSFER_TIME},
    {"REDIRECT_TIME", CURLINFO_REDIRECT_TIME},
    {"SIZE_DOWNLOAD", CURLINFO_SIZE_DOWNLOAD},
    {"SIZE_UPLOAD", CURLINFO_SIZE_UPLOAD},
    {"SPEED_DOWNLOAD", CURLINFO_SPEED_DOWNLOAD},
    {"SPEED_UPLOAD", CURLINFO_SPEED_UPLOAD},
    {"STARTTRANSFER_TIME", CURLINFO_STARTTRANSFER_TIME},
    {"TOTAL_TIME", CURLINFO_TOTAL_TIME},
};

const std::vector<CurlConstant> curlInfoInteger = {
    {"CONDITION_UNMET", CURLINFO_CONDITION_UNMET},
    {"FILETIME", CURLINFO_FILETIME},
    {"HEADER_SIZE", CURLINFO_HEADER_SIZE},
    {"HTTPAUTH_AVAIL", CURLINFO_HTTPAUTH_AVAIL},
    {"HTTP_CONNECTCODE", CURLINFO_HTTP_CONNECTCODE},

#if NODE_LIBCURL_VER_GE(7, 50, 1)
    {"HTTP_VERSION", CURLINFO_HTTP_VERSION},
#endif

    {"LASTSOCKET", CURLINFO_LASTSOCKET},  // deprecated since 7.45.0
    {"LOCAL_PORT", CURLINFO_LOCAL_PORT},
    {"NUM_CONNECTS", CURLINFO_NUM_CONNECTS},
    {"OS_ERRNO", CURLINFO_OS_ERRNO},
    {"PRIMARY_PORT", CURLINFO_PRIMARY_PORT},

#if NODE_LIBCURL_VER_GE(7, 52, 0)
    {"PROTOCOL", CURLINFO_PROTOCOL},
#endif

    {"PROXYAUTH_AVAIL", CURLINFO_PROXYAUTH_AVAIL},

#if NODE_LIBCURL_VER_GE(7, 73, 0)
    {"PROXY_ERROR", CURLINFO_PROXY_ERROR},
#endif

#if NODE_LIBCURL_VER_GE(7, 52, 0)
    {"PROXY_SSL_VERIFYRESULT", CURLINFO_PROXY_SSL_VERIFYRESULT},
#endif

    {"REDIRECT_COUNT", CURLINFO_REDIRECT_COUNT},
    {"REQUEST_SIZE", CURLINFO_REQUEST_SIZE},
    {"RESPONSE_CODE", CURLINFO_RESPONSE_CODE},
    {"RTSP_CLIENT_CSEQ", CURLINFO_RTSP_CLIENT_CSEQ},
    {"RTSP_CSEQ_RECV", CURLINFO_RTSP_CSEQ_RECV},
    {"RTSP_SERVER_CSEQ", CURLINFO_RTSP_SERVER_CSEQ},
    {"SSL_VERIFYRESULT", CURLINFO_SSL_VERIFYRESULT},
};

const std::vector<CurlConstant> curlInfoSocket = {
#if NODE_LIBCURL_VER_GE(7, 45, 0)
    {"ACTIVESOCKET", CURLINFO_ACTIVESOCKET},
#endif
};

const std::vector<CurlConstant> curlInfoLinkedList = {
    {"SSL_ENGINES", CURLINFO_SSL_ENGINES},
    {"COOKIELIST", CURLINFO_COOKIELIST},
    {"CERTINFO", CURLINFO_CERTINFO},
};

const std::vector<CurlConstant> curlOptionBlob = {
#if NODE_LIBCURL_VER_GE(7, 77, 0)
    {"CAINFO_BLOB", CURLOPT_CAINFO_BLOB},
#endif

#if NODE_LIBCURL_VER_GE(7, 71, 0)
    {"ISSUERCERT_BLOB", CURLOPT_ISSUERCERT_BLOB},

#if NODE_LIBCURL_VER_GE(7, 77, 0)
    {"PROXY_CAINFO_BLOB", CURLOPT_PROXY_CAINFO_BLOB},
#endif

    {"PROXY_SSLCERT_BLOB", CURLOPT_PROXY_SSLCERT_BLOB},
    {"PROXY_SSLKEY_BLOB", CURLOPT_PROXY_SSLKEY_BLOB},
    {"SSLCERT_BLOB", CURLOPT_SSLCERT_BLOB},
    {"SSLKEY_BLOB", CURLOPT_SSLKEY_BLOB},
#endif
};

static void ExportConstants(v8::Local<v8::Object> obj,
                            const std::vector<NodeLibcurl::CurlConstant>& optionGroup,
                            v8::PropertyAttribute attributes) {
  Nan::HandleScope scope;

  for (std::vector<NodeLibcurl::CurlConstant>::const_iterator it = optionGroup.begin(),
                                                              end = optionGroup.end();
       it != end; ++it) {
    Nan::DefineOwnProperty(obj, Nan::New<v8::String>(it->name).ToLocalChecked(),
                           Nan::New<v8::Integer>(static_cast<int32_t>(it->value)), attributes);
  }
}

// Add Curl constructor to the module exports
NAN_MODULE_INIT(Initialize) {
  Nan::HandleScope scope;

  v8::Local<v8::Object> obj = Nan::New<v8::Object>();

  v8::PropertyAttribute attributes =
      static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete);
  v8::PropertyAttribute attributesDontEnum =
      static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete | v8::DontEnum);

  // export options
  v8::Local<v8::Object> optionsObj = Nan::New<v8::Object>();
  ExportConstants(optionsObj, curlOptionNotImplemented, attributesDontEnum);
  ExportConstants(optionsObj, curlOptionString, attributes);
  ExportConstants(optionsObj, curlOptionInteger, attributes);
  ExportConstants(optionsObj, curlOptionFunction, attributes);
  ExportConstants(optionsObj, curlOptionLinkedList, attributes);
  ExportConstants(optionsObj, curlOptionSpecific, attributes);
  ExportConstants(optionsObj, curlOptionBlob, attributes);

  // export infos
  v8::Local<v8::Object> infosObj = Nan::New<v8::Object>();
  ExportConstants(infosObj, curlInfoNotImplemented, attributesDontEnum);
  ExportConstants(infosObj, curlInfoString, attributes);
  ExportConstants(infosObj, curlInfoOffT, attributes);
  ExportConstants(infosObj, curlInfoDouble, attributes);
  ExportConstants(infosObj, curlInfoInteger, attributes);
  ExportConstants(infosObj, curlInfoSocket, attributes);
  ExportConstants(infosObj, curlInfoLinkedList, attributes);

  // export Curl codes
  v8::Local<v8::Object> multiObj = Nan::New<v8::Object>();
  ExportConstants(multiObj, curlMultiOptionNotImplemented, attributesDontEnum);
  ExportConstants(multiObj, curlMultiOptionInteger, attributes);
  ExportConstants(multiObj, curlMultiOptionStringArray, attributes);
  ExportConstants(multiObj, curlMultiOptionFunction, attributes);

  // static members
  Nan::DefineOwnProperty(obj, Nan::New<v8::String>("option").ToLocalChecked(), optionsObj,
                         attributes);
  Nan::DefineOwnProperty(obj, Nan::New<v8::String>("info").ToLocalChecked(), infosObj, attributes);
  Nan::DefineOwnProperty(obj, Nan::New<v8::String>("multi").ToLocalChecked(), multiObj, attributes);

  Nan::SetMethod(obj, "globalInit", GlobalInit);
  Nan::SetMethod(obj, "globalCleanup", GlobalCleanup);
  Nan::SetMethod(obj, "getVersion", GetVersion);
  Nan::SetMethod(obj, "getCount", GetCount);
  Nan::SetAccessor(obj, Nan::New("VERSION_NUM").ToLocalChecked(), GetterVersionNum, 0,
                   v8::Local<v8::Value>(), v8::DEFAULT, attributes);

  Nan::Set(target, Nan::New("Curl").ToLocalChecked(), obj);
}

int32_t IsInsideCurlConstantStruct(const std::vector<CurlConstant>& curlConstants,
                                   const v8::Local<v8::Value>& searchFor) {
  Nan::HandleScope scope;

  bool isString = searchFor->IsString();
  bool isInt = searchFor->IsInt32();

  std::string optionName = "";
  int32_t optionId = -1;

  if (!isString && !isInt) {
    return 0;
  }

  if (isString) {
    Nan::Utf8String optionNameV8(searchFor);

    optionName = std::string(*optionNameV8);

    std::transform(optionName.begin(), optionName.end(), optionName.begin(), ::toupper);

  } else {  // int
    optionId = Nan::To<int32_t>(searchFor).FromJust();
  }

  for (std::vector<CurlConstant>::const_iterator it = curlConstants.begin(),
                                                 end = curlConstants.end();
       it != end; ++it) {
    if ((isString && it->name == optionName) || (isInt && it->value == optionId)) {
      return static_cast<int32_t>(it->value);
    }
  }

  return 0;
}

// based on https://github.com/libxmljs/libxmljs/blob/master/src/libxmljs.cc#L45
void AdjustMemory(ssize_t diff) {
  Nan::HandleScope scope;

  addonAllocatedMemory += diff;

  // if v8 is no longer running, don't try to adjust memory

  // Return if no available Isolate
  if (v8::Isolate::GetCurrent() == 0 || v8::Isolate::GetCurrent()->IsDead()) {
    return;
  }

  Nan::AdjustExternalMemory(static_cast<int>(diff));
}

// Return human readable string with the version number of libcurl and some of its important
// components (like OpenSSL version).
NAN_METHOD(GetVersion) {
  Nan::HandleScope scope;

  const char* version = curl_version();

  v8::Local<v8::Value> versionObj = Nan::New<v8::String>(version).ToLocalChecked();

  info.GetReturnValue().Set(versionObj);
}

NAN_METHOD(GetCount) {
  Nan::HandleScope scope;

  info.GetReturnValue().Set(Easy::currentOpenedHandles);
}

// The following memory allocation wrappers are mostly the ones at
//  https://github.com/gagern/libxmljs/blob/master/src/libxmljs.cc#L77
//  made by Martin von Gagern (https://github.com/gagern)
//  Related code review at http://codereview.stackexchange.com/q/128547/10394
struct MemWrapper {
  size_t size;
  curl_off_t data;
};

#define MEMWRAPPER_SIZE offsetof(MemWrapper, data)

inline void* MemWrapperToClient(MemWrapper* memWrapper) {
  return static_cast<void*>(reinterpret_cast<char*>(memWrapper) + MEMWRAPPER_SIZE);
}

inline MemWrapper* ClientToMemWrapper(void* client) {
  return reinterpret_cast<MemWrapper*>(static_cast<char*>(client) - MEMWRAPPER_SIZE);
}

void* MallocCallback(size_t size) {
  size_t totalSize = size + MEMWRAPPER_SIZE;
  MemWrapper* mem = static_cast<MemWrapper*>(malloc(totalSize));
  if (!mem) return NULL;
  mem->size = size;
  AdjustMemory(totalSize);
  return MemWrapperToClient(mem);
}

void FreeCallback(void* p) {
  if (!p) return;
  MemWrapper* mem = ClientToMemWrapper(p);
  ssize_t totalSize = mem->size + MEMWRAPPER_SIZE;
  AdjustMemory(-totalSize);
  free(mem);
}

void* ReallocCallback(void* ptr, size_t size) {
  if (!ptr) return MallocCallback(size);
  MemWrapper* mem1 = ClientToMemWrapper(ptr);
  ssize_t oldSize = mem1->size;
  MemWrapper* mem2 = static_cast<MemWrapper*>(realloc(mem1, size + MEMWRAPPER_SIZE));
  if (!mem2) return NULL;
  mem2->size = size;
  AdjustMemory(ssize_t(size) - oldSize);
  return MemWrapperToClient(mem2);
}

char* StrdupCallback(const char* str) {
  size_t size = strlen(str) + 1;
  char* res = static_cast<char*>(MallocCallback(size));
  if (res) memcpy(res, str, size);
  return res;
}

void* CallocCallback(size_t nmemb, size_t size) {
  void* ptr = MallocCallback(nmemb * size);
  if (!ptr) return NULL;
  memset(ptr, 0, nmemb * size);  // zero-fill
  return ptr;
}

NAN_METHOD(GlobalInit) {
  Nan::HandleScope scope;

  long flags = info[0]->IsUndefined()                                         // NOLINT(runtime/int)
                   ? static_cast<long>(Nan::To<int32_t>(info[0]).FromJust())  // NOLINT(runtime/int)
                   : CURL_GLOBAL_ALL;

  curl_version_info_data* version = curl_version_info(CURLVERSION_NOW);
  isLibcurlBuiltWithThreadedResolver =
      (version->features & CURL_VERSION_ASYNCHDNS) == CURL_VERSION_ASYNCHDNS;

  CURLcode globalInitRetCode;

  // We only add the allloc wrappers if we are running libcurl without the threaded resolver
  //  that is because v8 AdjustAmountOfExternalAllocatedMemory must be called from the Node thread
  if (!isLibcurlBuiltWithThreadedResolver) {
    globalInitRetCode = curl_global_init_mem(flags, MallocCallback, FreeCallback, ReallocCallback,
                                             StrdupCallback, CallocCallback);
  } else {
    globalInitRetCode = curl_global_init(flags);
  }

  info.GetReturnValue().Set(globalInitRetCode);
}

NAN_METHOD(GlobalCleanup) {
  Nan::HandleScope scope;

  curl_global_cleanup();

  info.GetReturnValue().Set(Nan::Undefined());
}

// Return hexdecimal representation of the libcurl version.
NAN_GETTER(GetterVersionNum) {
  Nan::HandleScope scope;

  v8::Local<v8::Int32> version = Nan::New(LIBCURL_VERSION_NUM);

  info.GetReturnValue().Set(version);
}

}  // namespace NodeLibcurl