Add error code to string conversions

include/coeurl/errors.hpp

+#pragma once
+
+/// @file
+/// @brief Include for error to string conversions
+
+#include <curl/curl.h>
+
+namespace coeurl {
+    const char* to_string(CURLcode c);
+    const char* to_string(CURLUcode c);
+    const char* to_string(CURLMcode c);
+    const char* to_string(CURLSHcode c);
+};
+

lib/errors.cpp

+#include <coeurl/errors.hpp>
+
+const char* coeurl::to_string(CURLcode c) {
+    return curl_easy_strerror(c);
+}
+
+const char* coeurl::to_string(CURLUcode c) {
+    return curl_url_strerror(c);
+}
+
+const char* coeurl::to_string(CURLMcode c) {
+    return curl_multi_strerror(c);
+}
+
+const char* coeurl::to_string(CURLSHcode c) {
+    return curl_share_strerror(c);
+}

meson.build

@@ -94,14 +94,14 @@ if target_machine.system() == 'windows'
   ]
 endif
 
-lib = library('coeurl', ['lib/client.cpp', 'lib/request.cpp'],
+lib = library('coeurl', ['lib/client.cpp', 'lib/request.cpp', 'lib/errors.cpp'],
   include_directories: include,
   cpp_args : defines,
   dependencies: deps,
   version: meson.project_version(),
   install : true)
 
-install_headers('include/coeurl/headers.hpp', 'include/coeurl/client.hpp', 'include/coeurl/request.hpp', subdir : 'coeurl')
+install_headers('include/coeurl/headers.hpp', 'include/coeurl/client.hpp', 'include/coeurl/request.hpp', 'include/coeurl/errors.hpp', subdir : 'coeurl')
 
 coeurl_dep = declare_dependency(include_directories: include, link_with: lib, dependencies: deps)
 meson.override_dependency('coeurl', coeurl_dep)