proj.h: add proj_context_set_file_finder() and proj_context_set_search_paths() (refs #1150)

1 files changed, 146 insertions, 0 deletions

diff --git a/test/unit/proj_context_test.cpp b/test/unit/proj_context_test.cpp
new file mode 100644
index 00000000..23c46f29
--- /dev/null
+++ b/test/unit/proj_context_test.cpp
@@ -0,0 +1,146 @@
+/******************************************************************************
+ *
+ * Project:  PROJ
+ * Purpose:  Test functions in proj_context namespae
+ * Author:   Even Rouault <even dot rouault at spatialys dot com>
+ *
+ ******************************************************************************
+ * Copyright (c) 2019, Even Rouault <even dot rouault at spatialys dot com>
+ *
+ * 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.
+ ****************************************************************************/
+
+#include <stdlib.h>
+#ifdef _MSC_VER
+#include <io.h>
+#else
+#include <unistd.h>
+#endif
+
+#include "proj.h"
+#include "proj_internal.h"
+
+#include "gtest_include.h"
+
+namespace {
+
+static std::string createTempDict(std::string &dirname) {
+    const char *temp_dir = getenv("TEMP");
+    if (!temp_dir) {
+        temp_dir = getenv("TMP");
+    }
+#ifndef WIN32
+    if (!temp_dir) {
+        temp_dir = "/tmp";
+    }
+#endif
+    if (!temp_dir)
+        return std::string();
+
+    dirname = temp_dir;
+
+    std::string tmpFilename;
+    tmpFilename = temp_dir;
+    tmpFilename += DIR_CHAR;
+    tmpFilename += "temp_proj_dic";
+
+    FILE *f = fopen(tmpFilename.c_str(), "wt");
+    if (!f)
+        return std::string();
+    fprintf(
+        f,
+        "<MY_PIPELINE> +proj=pipeline +step +proj=utm +zone=31 +ellps=GRS80\n");
+    fclose(f);
+    return tmpFilename;
+}
+
+// ---------------------------------------------------------------------------
+
+static int MyUnlink(const std::string &filename) {
+#ifdef _MSC_VER
+    return _unlink(filename.c_str());
+#else
+    return unlink(filename.c_str());
+#endif
+}
+
+// ---------------------------------------------------------------------------
+
+TEST(proj_context, proj_context_set_file_finder) {
+
+    std::string dirname;
+    auto filename = createTempDict(dirname);
+    if (filename.empty())
+        return;
+
+    auto ctx = proj_context_create();
+
+    struct FinderData {
+        PJ_CONTEXT *got_ctx = nullptr;
+        std::string dirname{};
+        std::string tmpFilename{};
+    };
+
+    const auto finder = [](PJ_CONTEXT *got_ctx, const char *file,
+                           void *user_data) -> const char * {
+        auto finderData = static_cast<FinderData *>(user_data);
+        finderData->got_ctx = got_ctx;
+        finderData->tmpFilename = finderData->dirname;
+        finderData->tmpFilename += DIR_CHAR;
+        finderData->tmpFilename += file;
+        return finderData->tmpFilename.c_str();
+    };
+
+    FinderData finderData;
+    finderData.dirname = dirname;
+    proj_context_set_file_finder(ctx, finder, &finderData);
+
+    auto P = proj_create(ctx, "+init=temp_proj_dic:MY_PIPELINE");
+    EXPECT_NE(P, nullptr);
+    proj_destroy(P);
+
+    EXPECT_EQ(finderData.got_ctx, ctx);
+
+    proj_context_destroy(ctx);
+}
+
+// ---------------------------------------------------------------------------
+
+TEST(proj_context, proj_context_set_search_paths) {
+
+    std::string dirname;
+    auto filename = createTempDict(dirname);
+    if (filename.empty())
+        return;
+
+    auto ctx = proj_context_create();
+
+    const char *path = dirname.c_str();
+    proj_context_set_search_paths(ctx, 1, &path);
+
+    auto P = proj_create(ctx, "+init=temp_proj_dic:MY_PIPELINE");
+    EXPECT_NE(P, nullptr);
+    proj_destroy(P);
+
+    proj_context_destroy(ctx);
+
+    MyUnlink(filename);
+}
+
+} // namespace