Function pj_load_ini

ThirdParty/libproj/vtklibproj/src/filemanager.cpp:1793–1867

/************************************************************************/

void pj_load_ini(PJ_CONTEXT *ctx) {
    if (ctx->iniFileLoaded)
        return;

    const char *endpoint_from_env = getenv("PROJ_NETWORK_ENDPOINT");
    if (endpoint_from_env && endpoint_from_env[0] != '\0') {
        ctx->endpoint = endpoint_from_env;
    }

    ctx->iniFileLoaded = true;
    auto file = std::unique_ptr<NS_PROJ::File>(
        reinterpret_cast<NS_PROJ::File *>(pj_open_lib_internal(
            ctx, "proj.ini", "rb", pj_open_file_with_manager, nullptr, 0)));
    if (!file)
        return;
    file->seek(0, SEEK_END);
    const auto filesize = file->tell();
    if (filesize == 0 || filesize > 100 * 1024U)
        return;
    file->seek(0, SEEK_SET);
    std::string content;
    content.resize(static_cast<size_t>(filesize));
    const auto nread = file->read(&content[0], content.size());
    if (nread != content.size())
        return;
    content += '\n';
    size_t pos = 0;
    while (pos != std::string::npos) {
        const auto eol = content.find_first_of("\r\n", pos);
        if (eol == std::string::npos) {
            break;
        }

        const auto equal = content.find('=', pos);
        if (equal < eol) {
            const auto key = trim(content.substr(pos, equal - pos));
            const auto value =
                trim(content.substr(equal + 1, eol - (equal + 1)));
            if (ctx->endpoint.empty() && key == "cdn_endpoint") {
                ctx->endpoint = value;
            } else if (key == "network") {
                const char *enabled = getenv("PROJ_NETWORK");
                if (enabled == nullptr || enabled[0] == '\0') {
                    ctx->networking.enabled = ci_equal(value, "ON") ||
                                              ci_equal(value, "YES") ||
                                              ci_equal(value, "TRUE");
                }
            } else if (key == "cache_enabled") {
                ctx->gridChunkCache.enabled = ci_equal(value, "ON") ||
                                              ci_equal(value, "YES") ||
                                              ci_equal(value, "TRUE");
            } else if (key == "cache_size_MB") {
                const int val = atoi(value.c_str());
                ctx->gridChunkCache.max_size =
                    val > 0 ? static_cast<long long>(val) * 1024 * 1024 : -1;
            } else if (key == "cache_ttl_sec") {
                ctx->gridChunkCache.ttl = atoi(value.c_str());
            } else if (key == "tmerc_default_algo") {