Make a library for writing and reading tiff, added tests (#347)

* removed Makefile for moench and integrated the build in CMake
* broke out tiff reading and writing to its own library
* moved tiff includes to include/sls
* moved tiffio source to src
* removed incorrectly used bps
* cleanup and tests for tiffio
* removed using namespace std from header
* some fixing for moench04
* Program for offline processing renamed

Co-authored-by: Anna Bergamaschi <anna.bergamaschi@psi.ch>

slsDetectorCalibration/tiffio/tests/CMakeLists.txt

@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: LGPL-3.0-or-other
+# Copyright (C) 2021 Contributors to the SLS Detector Package
+target_sources(tests PRIVATE 
+                ${CMAKE_CURRENT_SOURCE_DIR}/test-tiffio.cpp
+)

slsDetectorCalibration/tiffio/tests/test-tiffio.cpp

@@ -0,0 +1,54 @@
+
+
+#include "catch.hpp"
+#include "sls/tiffIO.h"
+#include <cstdio>
+#include <ftw.h>
+#include <iostream>
+#include <vector>
+
+/* Call-back to the 'remove()' function called by nftw() */
+static int remove_callback(const char *pathname,
+                           __attribute__((unused)) const struct stat *sbuf,
+                           __attribute__((unused)) int type,
+                           __attribute__((unused)) struct FTW *ftwb) {
+    return remove(pathname);
+}
+
+TEST_CASE("Write and read back data from tiff file") {
+
+    std::vector<float> data{1, 2, 3, 4, 5, 6, 7, 8, 9};
+
+    /* Create the temporary directory */
+    char tmp[] = "/tmp/tmpdir.XXXXXX";
+    char *tmp_dirname = mkdtemp(tmp);
+
+    if (tmp_dirname == NULL) {
+        perror("tempdir: error: Could not create tmp directory");
+        CHECK(false);
+    }
+
+    std::string fname = std::string(tmp_dirname) + std::string("/test.tif");
+    std::cout << "Writing to: " << fname<< '\n';
+    
+    WriteToTiff(data.data(), fname.c_str(), 3, 3);
+
+    //Readback
+    uint32_t nrow, ncol;
+    float* ptr = ReadFromTiff(fname.c_str(), nrow, ncol);
+    CHECK(nrow == 3);
+    CHECK(ncol == 3);
+    uint32_t size = nrow*ncol;
+    for (uint32_t i = 0; i!=size; ++i){
+        CHECK(data[i] == ptr[i]);
+    }
+
+    delete[] ptr;
+
+    /* Delete the temporary directory */
+    if (nftw(tmp_dirname, remove_callback, FOPEN_MAX,
+             FTW_DEPTH | FTW_MOUNT | FTW_PHYS) == -1) {
+        perror("tempdir: error: ");
+        exit(EXIT_FAILURE);
+    }
+}