projCtx_t: Copy ini file settings, proj4_init_rules, etc.. when initializing context from global

.gitignore

@@ -93,6 +93,7 @@ install_manifest.txt
 /data/stlrnc
 /data/stpaul
 /data/tv_out
+/data/for_tests/
 
 # docs
 tmp_breathe
@@ -117,6 +118,7 @@ m4/lt~obsolete.m4
 /src/proj_config.h
 /src/proj_config.h.in
 /src/projinfo
+/src/projsync
 /src/stamp-h1
 /src/test-suite.log
 
@@ -130,6 +132,9 @@ m4/lt~obsolete.m4
 /test/unit/proj_context_test
 /test/unit/test_cpp_api
 /test/unit/proj_errno_string_test
+/test/unit/test_defmodel
+/test/unit/test_network
+/tmp_alias/
 
 # jniwrap
 jniwrap/out

src/ctx.cpp

@@ -167,22 +167,30 @@ void projCtx_t::set_ca_bundle_path(const std::string& ca_bundle_path_in)
 /*                  projCtx_t(const projCtx_t& other)                   */
 /************************************************************************/
 
-projCtx_t::projCtx_t(const projCtx_t& other)
+projCtx_t::projCtx_t(const projCtx_t& other) :
+    debug_level(other.debug_level),
+    logger(other.logger),
+    logger_app_data(other.logger_app_data),
+    fileapi_legacy(other.fileapi_legacy),
+    cpp_context(other.cpp_context ? other.cpp_context->clone(this) : nullptr),
+    use_proj4_init_rules(other.use_proj4_init_rules),
+    epsg_file_exists(other.epsg_file_exists),
+    ca_bundle_path(other.ca_bundle_path),
+    env_var_proj_lib(other.env_var_proj_lib),
+    file_finder_legacy(other.file_finder_legacy),
+    file_finder(other.file_finder),
+    file_finder_user_data(other.file_finder_user_data),
+    custom_sqlite3_vfs_name(other.custom_sqlite3_vfs_name),
+    user_writable_directory(other.user_writable_directory),
+    // BEGIN ini file settings
+    iniFileLoaded(other.iniFileLoaded),
+    endpoint(other.endpoint),
+    networking(other.networking),
+    gridChunkCache(other.gridChunkCache),
+    defaultTmercAlgo(other.defaultTmercAlgo)
+    // END ini file settings
 {
-    debug_level = other.debug_level;
-    logger = other.logger;
-    logger_app_data = other.logger_app_data;
-    fileapi_legacy = other.fileapi_legacy;
-    epsg_file_exists = other.epsg_file_exists;
     set_search_paths(other.search_paths);
-    file_finder = other.file_finder;
-    file_finder_legacy = other.file_finder_legacy;
-    file_finder_user_data = other.file_finder_user_data;
-    networking = other.networking;
-    ca_bundle_path = other.ca_bundle_path;
-    if (other.cpp_context != nullptr) {
-        cpp_context = other.cpp_context->clone(this);
-    }
 }
 
 /************************************************************************/

src/proj_internal.h

@@ -735,22 +735,23 @@ struct projCtx_t {
     const char* (*file_finder) (PJ_CONTEXT *, const char*, void* user_data) = nullptr;
     void* file_finder_user_data = nullptr;
 
-    projNetworkCallbacksAndData networking{};
-    bool defer_grid_opening = false; // set by pj_obj_create()
+    bool defer_grid_opening = false; // set transiently by pj_obj_create()
 
     projFileApiCallbackAndData fileApi{};
     std::string custom_sqlite3_vfs_name{};
+    std::string user_writable_directory{};
 
+    // BEGIN ini file settings
     bool iniFileLoaded = false;
     std::string endpoint{};
-
-    std::string user_writable_directory{};
+    projNetworkCallbacksAndData networking{};
     projGridChunkCache gridChunkCache{};
+    TMercAlgo defaultTmercAlgo = TMercAlgo::PODER_ENGSAGER; // can be overridden by content of proj.ini
+    // END ini file settings
 
     int projStringParserCreateFromPROJStringRecursionCounter = 0; // to avoid potential infinite recursion in PROJStringParser::createFromPROJString()
     int pipelineInitRecursiongCounter = 0; // to avoid potential infinite recursion in pipeline.cpp
 
-    TMercAlgo defaultTmercAlgo = TMercAlgo::PODER_ENGSAGER; // can be overridden by content of proj.ini
 
     projCtx_t() = default;
     projCtx_t(const projCtx_t&);

test/unit/test_c_api.cpp

@@ -4797,6 +4797,51 @@ TEST_F(CApi, proj_context_set_sqlite3_vfs_name) {
 
 // ---------------------------------------------------------------------------
 
+TEST_F(CApi, proj_context_set_sqlite3_vfs_name__from_global_context) {
+
+    // Set a dummy VFS and check it is taken into account
+    // (failure to open proj.db)
+    proj_context_set_sqlite3_vfs_name(nullptr, "dummy_vfs_name");
+
+    PJ_CONTEXT *ctx = proj_context_create();
+    proj_log_func(ctx, nullptr, [](void *, int, const char *) -> void {});
+
+    ASSERT_EQ(proj_create(ctx, "EPSG:4326"), nullptr);
+
+    // Restore default VFS
+    proj_context_set_sqlite3_vfs_name(nullptr, nullptr);
+    proj_context_destroy(ctx);
+}
+
+// ---------------------------------------------------------------------------
+
+TEST_F(CApi, use_proj4_init_rules) {
+    PJ_CONTEXT *ctx = proj_context_create();
+    proj_context_use_proj4_init_rules(ctx, true);
+    ASSERT_TRUE(proj_context_get_use_proj4_init_rules(ctx, true));
+    proj_context_use_proj4_init_rules(ctx, false);
+    ASSERT_TRUE(!proj_context_get_use_proj4_init_rules(ctx, true));
+    proj_context_destroy(ctx);
+}
+
+// ---------------------------------------------------------------------------
+
+TEST_F(CApi, use_proj4_init_rules_from_global_context) {
+
+    int initial_rules = proj_context_get_use_proj4_init_rules(nullptr, true);
+    proj_context_use_proj4_init_rules(nullptr, true);
+    PJ_CONTEXT *ctx = proj_context_create();
+    ASSERT_TRUE(proj_context_get_use_proj4_init_rules(ctx, true));
+    proj_context_destroy(ctx);
+    proj_context_use_proj4_init_rules(nullptr, false);
+    ctx = proj_context_create();
+    ASSERT_TRUE(!proj_context_get_use_proj4_init_rules(ctx, true));
+    proj_context_destroy(ctx);
+    proj_context_use_proj4_init_rules(nullptr, initial_rules);
+}
+
+// ---------------------------------------------------------------------------
+
 TEST_F(CApi, proj_is_equivalent_to_with_ctx) {
     auto from_epsg = proj_create_from_database(m_ctxt, "EPSG", "7844",
                                                PJ_CATEGORY_CRS, false, nullptr);